CN111705419B - A kind of graphene-based flexible non-woven fabric loaded with metal-doped carbon nitride and its preparation method and application - Google Patents
A kind of graphene-based flexible non-woven fabric loaded with metal-doped carbon nitride and its preparation method and application Download PDFInfo
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- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
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- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
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- D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
- D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
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- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C7/00—Heating or cooling textile fabrics
- D06C7/04—Carbonising or oxidising
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Abstract
本发明公开了一种负载金属掺杂氮化碳的石墨烯基柔性无纺布及其制备方法和应用，步骤如下：首先将氧化石墨烯分散液注入含有一定量金属离子的凝固浴中得到交联的凝胶纤维，并通过溶胀‑融合的作用得到含有金属离子的氧化石墨烯无纺布，再利用化学气相沉积法在无纺布上原位生成金属掺杂的氮化碳，获得负载金属掺杂氮化碳的石墨烯基柔性无纺布。此无纺布具有一定的耐弯曲性能，且具有很强的光响应活性，在可见光催化领域具有广阔的应用前景。本发明推动了石墨烯基材料的实际应用，拓展了光催化器件制备方法，为发展便携式光催化器件提供有益助力。
The invention discloses a graphene-based flexible non-woven fabric loaded with metal doped carbon nitride and a preparation method and application thereof. The steps are as follows: firstly, a graphene oxide dispersion liquid is injected into a coagulation bath containing a certain amount of metal ions to obtain a cross-linking solution. gel fibers, and obtain graphene oxide non-woven fabric containing metal ions through the effect of swelling-fusion, and then use chemical vapor deposition method to generate metal-doped carbon nitride on the non-woven fabric in situ to obtain supported metal Graphene-based flexible nonwovens doped with carbon nitride. The non-woven fabric has certain bending resistance and strong light-responsive activity, and has broad application prospects in the field of visible light catalysis. The invention promotes the practical application of graphene-based materials, expands the preparation method of photocatalytic devices, and provides beneficial assistance for the development of portable photocatalytic devices.
Description
Technical Field
The invention belongs to the field of graphene materials, and relates to a metal-doped carbon nitride-loaded graphene-based flexible non-woven fabric, and a preparation method and application thereof.
Background
Currently, among the various possibilities to explore attractive sustainable energy sources and technologies, photocatalytic technology is considered one of the most attractive and promising technologies to directly capture, convert and store renewable solar energy to produce sustainable green energy and a wide range of environments. Heterogeneous photocatalysis on powder semiconductors has wide applications in the fields of water decomposition, environmental remediation, carbon dioxide reduction, space disinfection, selective organic conversion and the like. It is clear that high efficiency photocatalysts play a crucial role in determining the overall quantum efficiency of all these photocatalytic reaction systems. Carbon nitride (C)3N4) As a metal-free polymer n-type semiconductor material, it has unique electrical, optical, structural and physicochemical properties, and has been widely used in fundamental research of photocatalysis. But do notThe method still faces scientific and industrial problems that the photoproduction electron hole pair is difficult to separate, the electron mobility is not high, the band gap is difficult to regulate and control, and the like. To date, no reliable commercial material has been able to meet the requirements of high visible light quantum efficiency, stability, safety, and low cost.
Graphene, which is a typical representative of two-dimensional materials, has a large specific surface area and high electrical conductivity, making it an ideal carrier for electrode materials. The band gap can be accurately regulated and controlled through heteroatom doping, the preparation method becomes a new hot spot in the field of photocatalysis, and the development of visible light photocatalytic materials is greatly promoted through controllable compounding of the preparation method and a high-activity optical semiconductor. The energy band structure and the micro morphology of the carbon nitride are regulated and controlled by the graphene-based material, so that a powerful means for improving the overall performance of the photocatalytic material is provided. However, the current research mainly focuses on the regulation and control of the composite energy band of graphene and carbon nitride and the construction of the micro-morphology, and reports are rarely made on the assembly form of the two macro materials and the related large-scale preparation. In addition, the demand of the modern society for portable devices is higher and higher, and how to obtain a light, bending-resistant and easy-to-store photocatalytic device is also a bottleneck at present.
Disclosure of Invention
The invention aims to provide a metal-doped carbon nitride-loaded graphene-based flexible non-woven fabric and a preparation method and application thereof, aiming at the defects of the prior art, the preparation method is simple and feasible, wet spinning and temperature-controlled calcination are mature processes and are suitable for amplification production, the proposed composite material structure is reasonably constructed, the composite material not only has a multi-fold structure of a graphene framework and is beneficial to increasing a reaction interface and improving the reaction rate, but also has uniformly-distributed metal-doped carbon nitride nano materials, the energy band structure is controllable and easy to control, and the optical activity is easy to optimize and enhance.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a preparation method of metal-loaded carbon nitride-doped graphene-based flexible non-woven fabric comprises the following specific steps:
(1) injecting the graphene oxide water-based dispersion liquid into an aqueous solution coagulating bath containing metal salt with the concentration of 0.01-0.1 mol/L through a circular spinning head to obtain metal ion crosslinked graphene oxide hydrogel fibers;
(2) filtering the hydrogel fiber, washing the hydrogel fiber by using a solvent containing the same metal salt, and drying to obtain a partially-crosslinked graphene oxide non-woven fabric containing metal ions;
(3) and arranging the non-woven fabric above a porcelain boat, adding a carbon nitride precursor below the porcelain boat, and then placing the porcelain boat in a tubular furnace for high-temperature calcination to obtain the metal-doped carbon nitride-loaded graphene-based flexible non-woven fabric.
Preferably, in the step (1), the metal salt is a soluble salt of transition metal iron, cobalt, nickel, copper or zinc.
Preferably, in the step (2), the detergent solvent is one or more of water, ethanol or acetone polar solvents, and the molar concentration of the detergent metal salt is 1-10 times of that of the coagulating bath.
Preferably, in the step (3), the carbon nitride precursor is one or a mixture of more of cyanamide, dicyandiamide and urea, and the mass ratio of the carbon nitride precursor to the graphene oxide non-woven fabric is 500: 1-50: 1.
Preferably, in the step (3), the heat treatment atmosphere is nitrogen or argon, the temperature is 550-600 ℃, and the holding time is between 0.5 and 5 hours.
Preferably, in the step (1), the metal ions are cobalt ions, the concentration of the cobalt ions is 0.05 mol/l, the cobalt ions of the detergent in the step (2) are 0.25 mol/l, the cobalt ions are washed by a mixed solution of ethanol and water with the same volume, urea with the mass of 200 times of that of the detergent in the step (3) is used as a precursor, and the precursor is calcined at 580 ℃ for 2 hours to obtain the graphene-based flexible non-woven fabric uniformly loaded with the cobalt-doped carbon nitride.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: the metal-doped carbon nitride-loaded graphene-based flexible non-woven fabric prepared by any one of the methods.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: the metal-doped carbon nitride-loaded graphene-based flexible non-woven fabric can be applied as a catalyst for photocatalytic decomposition of organic matters.
Preferably, in the step (1), the metal ions are cobalt ions, the concentration of the cobalt ions is 0.05 mol/l, the cobalt ions of the detergent in the step (2) are 0.5 mol/l, the cobalt ions are washed by a mixed solution of ethanol and water with the same volume, urea with the mass of 200 times of that of the detergent in the step (3) is used as a precursor, and the obtained product is calcined at 580 ℃ for 2 hours to obtain the graphene-based flexible non-woven fabric with the uniformly loaded cobalt-doped carbon nitride, wherein the graphene-based flexible non-woven fabric has the performance of photocatalytic decomposition of organic matters: the reaction rate reached 2.9 per hour.
A preparation method of metal-loaded carbon nitride-doped graphene-based flexible non-woven fabric comprises the following steps:
(1) injecting the graphene oxide water-based dispersion liquid into a coagulating bath containing metal salt through a circular spinning head to obtain metal ion crosslinked graphene oxide hydrogel fibers;
(2) filtering the hydrogel fiber, washing the hydrogel fiber by using a solvent containing the same metal salt, and drying to obtain a partially-crosslinked graphene oxide non-woven fabric containing metal ions;
(3) and arranging the non-woven fabric above a porcelain boat, adding a carbon nitride precursor below the porcelain boat, and then placing the porcelain boat in a tubular furnace for high-temperature calcination to obtain the metal-doped carbon nitride-loaded graphene-based flexible non-woven fabric.
The metal salt in the step (1) is soluble transition metal salt, and the concentration is 0.01-0.1 mol per liter.
The detergent solvent in the step (2) is one or more of polar solvents such as water, ethanol and acetone, and the concentration of the detergent metal salt is 1-10 times of that of the coagulating bath.
The carbon nitride precursor in the step (3) is one or a mixture of more of cyanamide, dicyandiamide and urea, and the mass ratio of the carbon nitride precursor to the graphene oxide non-woven fabric is 500: 1-50: 1.
The heat treatment atmosphere in the step (3) is nitrogen or argon, the temperature is 550-600 ℃, and the heat preservation time is 0.5-5 hours.
The invention has the beneficial effects that:
(1) the invention provides a preparation method of a metal-doped carbon nitride-graphene composite flexible photocatalytic material for the first time, expands the field of flexible photocatalytic assemblies, and provides a beneficial reference for promoting the development of portable photocatalytic devices;
(2) the preparation method adopted by the invention is simple and easy to implement, and wet spinning and temperature-controlled calcination are mature processes, so that the preparation method is suitable for large-scale production;
(3) the composite material provided by the invention has a reasonable structure, not only has a multi-fold structure of a graphene framework, is beneficial to increasing a reaction interface and improving the reaction rate, but also has uniformly distributed metal-doped carbon nitride nano materials, and has controllable and easily controllable energy band structure and easily optimized and enhanced optical activity.
(4) The metal-doped carbon nitride-loaded graphene-based flexible non-woven fabric is formed by disordered bonding of graphene-based fibers with the diameter of hundreds of micrometers, metal-doped carbon nitride nano particles uniformly grow on the fibers in situ, and the metal-doped carbon nitride-loaded graphene-based flexible non-woven fabric is rarely reported in appearance.
(5) The invention discloses a metal-loaded carbon nitride-doped graphene-based flexible non-woven fabric and a preparation method thereof, wherein the preparation method comprises the following steps: firstly, injecting a graphene oxide dispersion liquid into a coagulating bath containing a certain amount of metal ions to obtain a crosslinked gel fiber, obtaining a graphene oxide non-woven fabric containing the metal ions through swelling-fusing, and then generating metal-doped carbon nitride on the non-woven fabric in situ by using a chemical vapor deposition method to obtain the metal-doped carbon nitride-loaded graphene-based flexible non-woven fabric. The non-woven fabric has certain bending resistance, strong photoresponse activity and wide application prospect in the field of visible light catalysis. The invention promotes the practical application of the graphene-based material, expands the preparation method of the photocatalytic device and provides beneficial assistance for developing the portable photocatalytic device.
Drawings
FIG. 1 is a schematic diagram of a cobalt-doped carbon nitride-loaded graphene-based flexible non-woven fabric in example 1
FIG. 2 is a graph showing the bending resistance of the cobalt-doped carbon nitride-loaded graphene-based flexible non-woven fabric in example 1
FIG. 3 is a scanning electron microscope image of the cobalt-doped carbon nitride loaded graphene-based flexible non-woven fabric in example 1
FIG. 4 is an ultraviolet diagram of catalytic decomposition of rhodamine by cobalt-doped carbon nitride-loaded graphene-based flexible non-woven fabric in example 1
FIG. 5 is ultraviolet diagram of catalytic decomposition of rhodamine by graphene-based flexible non-woven fabric in comparative example 1
Detailed Description
The method is based on a rapid and efficient wet spinning technology, the characteristic that graphene oxide is formed in a cross-linking mode under the action of metal ions is utilized, fibrous graphene oxide hydrogel is obtained through the shaping effect of a spinning head, the washing condition is accurately controlled through regulating and controlling the interface swelling-fusing effect, filtering and drying are carried out to obtain the graphene oxide non-woven fabric containing metal ions, and after subsequent heat treatment, a carbon nitride nano material with optical activity is generated on the surface of the graphene oxide in situ, so that the metal-doped carbon nitride-loaded graphene-based flexible non-woven fabric is prepared. The nanoscale carbon nitride has good photoresponse activity, and the carbon nitride is accurately doped by metal, so that the valence band structure of the composite material can be optimized, a proper band gap is constructed, and the optical responsivity is enhanced. The non-woven fabric has excellent flexibility and can resist certain bending, multiple folds on the surface of the non-woven fabric can easily absorb photons, the highly conductive graphene fiber is used as a framework, the highly responsive metal-doped carbon nitride is used as an active load, and the non-woven fabric has great application potential in the aspect of portable photocatalysis.
The present invention is described in detail below by way of examples, which are only used for further illustration of the present invention and are not to be construed as limiting the scope of the present invention, and the non-essential changes and modifications made by those skilled in the art according to the present invention belong to the scope of the present invention.
Example 1
(1) Injecting the graphene oxide aqueous dispersion liquid into a coagulating bath containing 0.05 mol/L of cobalt nitrate to obtain cobalt ion crosslinked graphene oxide hydrogel fibers;
(2) filtering the hydrogel fiber, washing with a solvent containing cobalt ions, wherein the solvent of the detergent is a mixed solution (volume ratio is 1:1) of water and ethanol, the concentration of the cobalt ions in the detergent is 5 times that in the coagulating bath, and drying to obtain a cobalt ion-containing graphene oxide non-woven fabric;
(3) and (2) arranging the non-woven fabric above a porcelain boat, adding urea below the porcelain boat, wherein the mass ratio of the urea to the graphene oxide non-woven fabric is 200:1, and then placing the porcelain boat in a tubular furnace to calcine for 2 hours at 580 ℃ to obtain the cobalt-doped carbon nitride-loaded graphene-based flexible non-woven fabric.
The cobalt-doped carbon nitride-loaded graphene-based flexible non-woven fabric obtained in the embodiment has a yellowish black appearance, and can be cut into various required shapes, as shown in fig. 1. The composite non-woven fabric has excellent flexibility, can resist 90-degree bending without being broken, and has no obvious crack after repeated bending, as shown in figure 2. The microstructure shown in fig. 3 shows that the surface of the fiber has a large number of graphene-based folds, which is beneficial to photon absorption, and the amplified result shows that the cobalt-doped carbon nitride is in a nanowire shape and is uniformly distributed on the graphene folds, so that active sites are effectively exposed, and the photoresponse activity of the material is improved.
In the embodiment, rhodamine is used as a quasi-decomposition product, a graphene-based flexible non-woven fabric loaded with cobalt-doped carbon nitride and having a thickness of 5 square centimeters is placed in 100 milliliters of 1 millimole per liter of rhodamine, and the liquid can be completely faded after 1.5 hours of illumination, so that the concentration of the rhodamine is reduced to below 0.01 millimole per liter. The ultraviolet spectrum is shown in figure 4, the reaction rate is 2.9 per hour, and the good photocatalytic function is embodied. The non-woven fabric is directly taken out and then washed by water, can be placed in rhodamine again for photocatalysis, has no obvious performance attenuation after being repeated for 4 times, and proves that the non-woven fabric has an excellent recycling function.
Comparative example 1 pure graphene non-woven fabric containing no metal-doped carbon nitride
(1) Injecting the graphene oxide dimethylformamide dispersion liquid into a coagulating bath of ethyl acetate to obtain graphene oxide hydrogel fibers;
(2) filtering the hydrogel fibers, and drying to obtain graphene oxide non-woven fabrics;
(3) and placing the non-woven fabric into a porcelain boat, and then placing the porcelain boat into a tube furnace to calcine for 2 hours at 580 ℃, so as to obtain the graphene flexible non-woven fabric.
Through the above steps, the obtained graphene fiber has excellent flexibility and conductivity, but the color is darker and darker black than that of the cobalt-doped carbon nitride-loaded graphene-based flexible non-woven fabric obtained in example 1, because yellow cobalt-doped carbon nitride is generated on the surface of the graphene-based carbon nitride fiber obtained in example 1. Compared with the cobalt-doped carbon nitride-loaded graphene-based flexible non-woven fabric obtained in example 1, the pure graphene has poor optical responsiveness, and the photochemical activity of the pure graphene non-woven fabric is basically absent, so that the quasi-decomposition product cannot be effectively degraded under the illumination. After 2 hours of illumination, the color of the water containing 1 millimole of rhodamine per liter is basically unchanged, and even after 24 hours of illumination, the rhodamine concentration is not obviously reduced. The reliability and feasibility of the metal-doped carbon nitride-loaded graphene non-woven fabric provided by the invention for enhancing the photoresponse are fully demonstrated. Therefore, in order to obtain a graphene-based material with practical photocatalytic value, it is of great significance to introduce photochemically active metal-doped carbon nitride in situ on a graphene non-woven fabric.
Example 2
(1) Injecting the graphene oxide aqueous dispersion liquid into a coagulating bath containing 0.01 mol/L of zinc nitrate to obtain zinc ion crosslinked graphene oxide hydrogel fibers;
(2) filtering the hydrogel fiber, washing with a solvent containing zinc ions, wherein the solvent of the detergent is acetone, the concentration of the zinc ions in the detergent is 10 times that in a coagulating bath, and drying to obtain a zinc ion-containing graphene oxide non-woven fabric;
(3) and arranging the non-woven fabric above a porcelain boat, adding dicyandiamide below the porcelain boat, wherein the mass ratio of dicyandiamide to graphene oxide non-woven fabric is 50:1, and then placing the porcelain boat in a tube furnace to calcine at 550 ℃ for 5 hours to obtain the zinc-doped carbon nitride loaded graphene-based flexible non-woven fabric.
The zinc-doped carbon nitride-loaded graphene-based flexible non-woven fabric obtained by the embodiment is yellowish black in appearance, excellent in flexibility, free of obvious cracks during repeated bending, and beneficial to photon absorption due to the fact that a large number of graphene-based folds are formed on the surface of the fiber, and cobalt-doped carbon nitride is uniformly distributed on the graphene folds, so that active sites are effectively exposed, and the photoresponse activity of the material is improved.
In the embodiment, rhodamine is used as a quasi-decomposition product, 5 square centimeters of graphene-based flexible non-woven fabric loaded with zinc-doped carbon nitride is placed in 100 milliliters of 1 millimole per liter of rhodamine, and the liquid can be completely faded after 6 hours of illumination, the reaction rate is 0.8 per hour, and a good photocatalytic function is embodied.
Example 3
(1) Injecting the graphene oxide aqueous dispersion liquid into a coagulating bath containing 0.1 mol/L of nickel nitrate to obtain nickel ion crosslinked graphene oxide hydrogel fibers;
(2) filtering the hydrogel fiber, washing with a solvent containing nickel ions, wherein the solvent of the detergent is ethanol, the concentration of the nickel ions in the detergent is the same as that in a coagulating bath, and drying to obtain a nickel ion-containing graphene oxide non-woven fabric;
(3) and arranging the non-woven fabric above a porcelain boat, adding cyanamide below the porcelain boat, wherein the mass ratio of the cyanamide to the graphene oxide non-woven fabric is 500:1, and then placing the porcelain boat in a tubular furnace to calcine for 0.5 hour at 600 ℃ to obtain the nickel-doped carbon nitride-loaded graphene-based flexible non-woven fabric.
The nickel-doped carbon nitride-loaded graphene-based flexible non-woven fabric obtained by the embodiment is yellowish black in appearance, excellent in flexibility, free of obvious cracks during repeated bending, and beneficial to photon absorption due to the fact that a large number of graphene-based folds are formed on the surface of the fiber, and cobalt-doped carbon nitride is uniformly distributed on the graphene folds, so that active sites are effectively exposed, and the photoresponse activity of the material is improved.
In the embodiment, rhodamine is used as a pseudo-decomposition product, 5 square centimeters of graphene-based flexible non-woven fabric loaded with nickel-doped carbon nitride is placed in 100 milliliters of 1 millimole per liter of rhodamine, and the liquid can be completely faded after illumination for 4.5 hours, the reaction rate is 1.2 per hour, and a good photocatalytic function is embodied.
Example 4
(1) Injecting the graphene oxide aqueous dispersion liquid into a coagulating bath containing 0.08 mol/L ferric chloride to obtain iron ion crosslinked graphene oxide hydrogel fibers;
(2) filtering hydrogel fibers, washing with a solvent containing iron ions, wherein the solvent of a washing agent is a mixed solution (volume ratio is 1:1) of ethanol and acetone, the concentration of the iron ions in the washing agent is 2 times that in a coagulating bath, and drying to obtain a graphene oxide non-woven fabric containing the iron ions;
(3) and (2) arranging the non-woven fabric above a porcelain boat, adding a mixture of dicyandiamide and cyanamide (mass ratio is 1:1) below the porcelain boat, wherein the mass ratio of the mixture to the graphene oxide non-woven fabric is 100:1, and then placing the porcelain boat in a tube furnace to calcine at 550 ℃ for 4 hours to obtain the iron-doped carbon nitride-loaded graphene-based flexible non-woven fabric.
The iron-doped carbon nitride-loaded graphene-based flexible non-woven fabric obtained by the embodiment has orange black appearance, excellent flexibility, no obvious crack is seen after repeated bending, a large number of graphene-based folds are formed on the surface of the fiber, photon absorption is facilitated, cobalt-doped carbon nitride is uniformly distributed on the graphene folds, active sites are effectively exposed, and the photoresponse activity of the material is improved.
In the embodiment, methyl orange is used as a pseudo-decomposition product, 5 square centimeters of graphene-based flexible non-woven fabric loaded with zinc-doped carbon nitride is placed in 100 milliliters of 1 millimole per liter of methyl orange, and the liquid can be completely faded after being illuminated for 3 hours, wherein the reaction rate is 1.8 per hour, and a good photocatalytic function is embodied.
Example 5
(1) Injecting the graphene oxide aqueous dispersion liquid into a coagulating bath containing 0.02 mol/L of copper acetate to obtain copper ion crosslinked graphene oxide hydrogel fibers;
(2) filtering hydrogel fibers, washing with a solvent containing copper ions, wherein the solvent of a washing agent is ethanol, the concentration of the copper ions in the washing agent is 8 times that in a coagulating bath, and drying to obtain a copper ion-containing graphene oxide non-woven fabric;
(3) and (2) arranging the non-woven fabric above a porcelain boat, adding urea below the porcelain boat, wherein the mass ratio of the urea to the graphene oxide non-woven fabric is 400:1, and then placing the porcelain boat in a tube furnace to calcine for 1 hour at 600 ℃ to obtain the copper-doped carbon nitride-loaded graphene-based flexible non-woven fabric.
The copper-doped carbon nitride loaded graphene-based flexible non-woven fabric obtained by the embodiment is reddish black in appearance, excellent in flexibility, free from obvious cracks due to repeated bending, and beneficial to photon absorption due to the fact that a large number of graphene-based folds are formed on the surface of the fiber, and cobalt-doped carbon nitride is uniformly distributed on the graphene folds, so that active sites are effectively exposed, and the photoresponse activity of the material is improved.
In the embodiment, methyl orange is used as a pseudo-decomposition product, 5 square centimeters of graphene-based flexible non-woven fabric loaded with copper-doped carbon nitride is placed in 100 milliliters of 1 millimole per liter of methyl orange, the liquid can be completely faded after being illuminated for 7 hours, the reaction rate is 0.7 per hour, and a good photocatalytic function is embodied.
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| CN113215857B (en) * | 2021-04-13 | 2022-07-08 | 中国科学院电工研究所 | A kind of heteroatom-doped graphene nanofiber nonwoven fabric and preparation method thereof |
| CN114130208B (en) * | 2021-11-24 | 2024-03-15 | 浙江枫翎控股集团有限公司 | Preparation method of high-solid-content high-strength copper alginate antibacterial filtering membrane |
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