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WO3/V2O5/FTO composite photoelectrode as well as preparation and use methods thereof

A composite light and electrode technology, applied in chemical instruments and methods, water/sewage treatment equipment, water/sludge/sewage treatment, etc. The raw materials and operation process are simple, the labor labor is reduced, and the spinning speed is fast.

Active Publication Date: 2016-09-07
JISHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of a single semiconductor catalyst has defects such as narrow light frequency and narrow application range. Therefore, in order to overcome the above defects, people use composite materials combined with semiconductor catalysts to solve the above problems.
However, the properties of materials vary greatly, and the coordination between materials may have functions that cancel each other out, and may also produce functions that promote each other. Therefore, screening suitable composite materials as semiconductor catalysts and improving photocatalytic efficiency have always been a hot topic of research.
[0003] In addition, most of the semiconductor catalysts prepared by conventional methods are nano-powders, which are easy to agglomerate and difficult to separate and recycle, which greatly restricts their commercialization process in photocatalytic technology.

Method used

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  • WO3/V2O5/FTO composite photoelectrode as well as preparation and use methods thereof
  • WO3/V2O5/FTO composite photoelectrode as well as preparation and use methods thereof
  • WO3/V2O5/FTO composite photoelectrode as well as preparation and use methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation process is as image 3 shown

[0030] (1) Preparation of precursor sol: weigh 0.1000g C with an electronic balance 15 h 21 o 6 Dissolve V in 4mL DMF, seal it and stir until completely dissolved; weigh 0.0728g H 40 N 10 W 12 ·xH 2 Dissolve O in 1mL of 0.1g / mL oxalic acid solution, seal it until dissolved; weigh 0.8000g PVP, dissolve it in 4mL DMF, seal it and stir until completely dissolved; mix the above three solutions, seal and stir until transparent to obtain n Viscous PVP / H with (V) / n(W) 1:1 40 N 10 W 12 ·xH 2 O / C 15 h 21 o 6 V precursor sol.

[0031] (2) Electrospinning: Inhale the precursor sol configured in step (1) into the syringe, clamp the metal electrode at the front end of the syringe at 2.0 cm, adjust the tilt angle of the syringe so that it forms an angle of 90° with the horizontal plane, and place the The temperature is ≤25°C, the humidity is ≤30%, and the distance between the needle of the syringe and the receiving conduct...

Embodiment 2

[0037] (1) Preparation of precursor sol: weigh 0.1000g C with an electronic balance 15 h 21 o 6 Dissolve V in 4mL DMF, seal it and stir until completely dissolved; weigh 0.1456g H 40 N 10 W 12 ·xH 2 O was dissolved in 2mL of 0.1g / mL oxalic acid solution, and sealed until completely dissolved; weighed 0.9000g PVP, dissolved in 5mL DMF, sealed and stirred until completely dissolved; mixed the above three solutions, sealed and stirred until transparent to obtain Viscous PVP / H with n(V) / n(W) 1:2 40 N 10 W 12 ·xH 2 O / C 15 h 21 o 6 V precursor sol.

[0038] (2) Electrospinning: Inhale the precursor sol configured in step (1) into the syringe, clamp the metal electrode at the front end of the syringe at 1.8 cm, adjust the tilt angle of the syringe so that it forms an angle of 100° with the horizontal plane, and place the The temperature is 32°C, the humidity is ≤28%, the distance between the needle of the syringe and the receiving conductive glass is adjusted to 15cm, an...

Embodiment 3

[0043] (1) Preparation of precursor sol: weigh 0.1000g C with an electronic balance 15 h 21 o 6 Dissolve V in 4mL DMF, seal it and stir until completely dissolved; weigh 0.2912g H 40 N 10 W 12 ·xH 2 O was dissolved in 4mL of 0.1g / mL oxalic acid solution, sealed until completely dissolved; weighed 1.0000g PVP, dissolved in 6mL DMF, sealed and stirred until completely dissolved; mixed the above three solutions, sealed and stirred until transparent to obtain n Viscous PVP / H with a (V) / n(W) ratio of 1:4 40 N 10 W 12 ·xH 2 O / C 15 h 21 o 6 V precursor sol.

[0044] (2) Electrospinning: Inhale the precursor sol configured in step (1) into the syringe, clamp the metal electrode at the front end of the syringe at 1.3 cm, adjust the tilt angle of the syringe so that it forms an angle of 120° with the horizontal plane, and place the Temperature ≤ 34°C, humidity ≤ 25%, adjust the distance between the syringe needle and the receiving conductive glass to 18cm, apply 13kV positi...

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Abstract

The invention belongs to the field of materials and discloses a method for preparing a conductive glass (FTO)-loaded tungsten trioxide (WO3) / vanadium pentoxide (V2O5) composite photoelectrode (WO3 / V2O5 / FTO). The method comprises the following steps: adopting vanadyl acetylacetonate and ammonium tungstate as raw materials, polyvinylpyrrolidone (PVP) as an auxiliary material, and dimethylformamide (DMF) and oxalic acid solution as solvents; loading a composite precursor onto conductive glass according to an electrostatic spinning technology and finally carrying out high-temperature roasting to obtain a WO3 / V2O5 / FTO composite photoelectrode material with high photo-electro-catalytic activity. The material is characterized through scanning electron microscope (SEM), X-ray diffraction (XRD), thermo-gravimetric-differential thermal analysis (TG-DTA), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared ray spectroscopy (FT-IR) and other means, so that the fiber material obtained by the method disclosed by the invention can be discovered that the release is uniform, and the diameter is 100-150 nm. The WO3 / V2O5 / FTO composite photoelectrode material prepared by adopting the method disclosed by the invention is simple in process and has higher photocatalysis under visible light.

Description

technical field [0001] The invention relates to a composite material, in particular to a WO 3 / V 2 o 5 / FTO composite photoelectrode and its preparation method. Background technique [0002] The elimination of organic pollutants is an unresolved environmental problem, and traditional governance methods have disadvantages such as poor economy, incomplete governance, and low efficiency. Photocatalytic technology can directly use solar energy, and has the advantages of easy control of operating conditions, simple process equipment, and high processing efficiency. It has been found that nano-scale semiconductor catalysts have the best photocatalytic properties. However, the use of a single semiconductor catalyst has defects such as narrow light frequency and narrow application range. Therefore, in order to overcome the above defects, people use composite materials combined with semiconductor catalysts to solve the above problems. However, the properties of materials vary gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30C02F1/461D01F9/08C02F101/38
CPCC02F1/30C02F1/46109C02F2001/46133C02F2101/308C02F2101/38C02F2201/46105D01F9/08
Inventor 林晓李佑稷李思思
Owner JISHOU UNIVERSITY
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