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BiVO4 full-mesoporous fiber material efficient photocatalyst

A fiber material and photocatalyst technology, which is applied in the field of BiVO4 full mesoporous fiber material high-efficiency photocatalyst, can solve the problems of low conduction band, inability to meet reduction potential, fast electron-hole combination rate, etc., and achieve the effect of improving electrical conductivity.

Inactive Publication Date: 2016-03-30
NINGBO UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it also has many disadvantages, because the conduction band of bismuth vanadate is low, it cannot meet the requirements of H in the visible light hydrolysis reaction. + The reduction potential of bismuth vanadate is because the electron-hole combination rate of bismuth vanadate is fast and the electron transport speed is slow in the photocatalytic reaction, which affects the photocatalytic activity of bismuth vanadate

Method used

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  • BiVO4 full-mesoporous fiber material efficient photocatalyst
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  • BiVO4 full-mesoporous fiber material efficient photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh polyvinylpyrrolidone (PVP) 0.7g (10%), bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O) 1.21g (17.3%) and vanadyl acetylacetonate (VO (acac) 2 ) 0.662g (9.5%) was dissolved in a mixture of 2.5g absolute ethanol, N-N dimethylformamide (DMF) 2.5g and 2g glacial acetic acid, stirred and mixed with a magnet for 6 hours at room temperature to obtain dark green Clear solution. Measure 6ml of the solution to be spun and inject it into a plastic needle tube, place it on a micro-injection pump, and set the injection speed to 0.2mm / min. The metal needle is used as the electrospinning anode, and the aluminum foil-coated roller is used as the cathode of the receiving material. The distance between the anode and the cathode is 20 cm, and electrospinning is carried out under 12kV high voltage (the environment during spinning is room temperature (20-30°C) ), humidity: 50-60%), and prepare the organic precursor fiber material. Then place the organic precursor fiber materia...

Embodiment 2

[0035] Weigh 0.7 g of polyvinylpyrrolidone (PVP), bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O) 1.21g and vanadyl acetylacetonate (VO(acac) 2 ) 0.662g is dissolved in the mixed solution of 2.5g dehydrated alcohol, N-N dimethylformamide (DMF) 2.5g and 2g glacial acetic acid, adds 0.5g diisopropyl azodicarboxylate ( Foaming agent, DIPA) and continued stirring to obtain a light brown-green transparent solution. After the microemulsion to be spun was left to stand, 6ml was measured and injected into a plastic needle tube, and placed on a micro-injection pump, and the injection speed was set at 0.2mm / min. The metal needle is used as the electrospinning anode, and the barbed wire is used as the cathode of the receiving material. The distance between the anode and the cathode is 20 cm, and electrospinning is carried out under 12kV high voltage (the environment is 30°C during spinning, humidity: 50-60%), Preparation of organic precursor fiber materials. Then, the organic pre...

Embodiment 3

[0037] Weigh 0.7 g of polyvinylpyrrolidone (PVP), bismuth nitrate pentahydrate (Bi(NO 3 ) 3 ·5H 2 O) 1.21g and vanadyl acetylacetonate (VO(acac) 2 ) 0.662g is dissolved in the mixed solution of 2.5g dehydrated alcohol, N-N dimethylformamide (DMF) 2.5g and 2g glacial acetic acid, adds 1.06g diisopropyl azodicarboxylate ( Foaming agent, DIPA) and continued stirring to obtain a light brown-green transparent solution. After the microemulsion to be spun was left to stand, 6ml was measured and injected into a plastic needle tube, and placed on a micro-injection pump, and the injection speed was set at 0.2mm / min. The metal needle is used as the electrospinning anode, and the barbed wire is used as the cathode of the receiving material. The distance between the anode and the cathode is 20cm, and electrospinning is carried out under 12kV high voltage (the environment is 40°C during spinning, humidity: 30-40%), Preparation of organic precursor fiber materials. Then, the organic pre...

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Abstract

The invention discloses a BiVO4 full-mesoporous fiber material efficient photocatalyst comprising a fiber material, wherein elements of the fiber material comprise three elements Bi, V and O; the surface of the fiber material has a porous structure, and the fiber material comprises monoclinic BiVO4 crystals. The invention provides the BiVO4 fiber material efficient photocatalyst having higher neat crystallinity; the fiber material has good micro-pore distribution, and besides, also has good fine controllability of the micro-pore structure; and moreover, the catalytic efficiency is high.

Description

technical field [0001] The invention relates to a photocatalyst, in particular to a high-efficiency photocatalyst of BiVO4 fully mesoporous fiber material. Background technique [0002] With the continuous development of the economy, the increasing environmental pollution has seriously restricted the sustainable development of the human economy and society. How to solve the problem of environmental pollution has become one of the hot issues of global concern. As a feasible and ideal strategy to solve environmental problems, semiconductor photocatalysis technology to degrade organic matter has attracted a lot of research attention. Photocatalysis technology uses semiconductor photocatalysts to absorb solar energy to degrade toxic pollutants. It has the advantages of mild reaction conditions, no secondary pollution and low cost, and has become an important technical means to solve environmental problems. Bismuth vanadate (BiVO 4 ) One-dimensional nanomaterials play an import...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22B01J35/06B01J35/10A62D3/17D01D1/02D01D5/00A62D101/26A62D101/28
CPCD01D1/02D01D5/0015B01J23/22A62D2101/28A62D2101/26B01J35/39B01J35/58
Inventor 杨为佑刘华兵侯慧林
Owner NINGBO UNIVERSITY OF TECHNOLOGY
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