Preparation method, product and application of BiOI/WO3 heterojunction efficient photoelectrocatalysis electrodes

A photoelectric catalysis, heterojunction technology, applied in chemical instruments and methods, physical/chemical process catalysts, water/sludge/sewage treatment, etc. The problem of high hole-pair recombination rate, to achieve the effect of broadening the light absorption range, broadening the visible light response wavelength, and excellent electron mobility

Active Publication Date: 2019-10-25
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, WO 3 Thin-film electrodes have a small solar light absorption range and a high recombination rate of photogenerated electron-hole pairs, which severely limits their wide application in the field of photocatalysis.

Method used

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  • Preparation method, product and application of BiOI/WO3 heterojunction efficient photoelectrocatalysis electrodes
  • Preparation method, product and application of BiOI/WO3 heterojunction efficient photoelectrocatalysis electrodes
  • Preparation method, product and application of BiOI/WO3 heterojunction efficient photoelectrocatalysis electrodes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Step 1: WO 3 Preparation of photoelectrocatalytic electrodes

[0037] 0.231g Na 2 WO 4 ·H 2 O was dissolved in 30ml of deionized water and continuously magnetically stirred to make it evenly mixed, and 10ml of 3mol / L HCl solution was added dropwise to the solution, and 0.2g (NH 4 ) 2 C 2 o 4 , continue to stir for 10 minutes, add 30ml of deionized water again, stir magnetically for 30 minutes, place the FTO conductive glass in the hydrothermal reaction kettle with the above solution, transfer the hydrothermal reaction kettle to the oven, and control the hydrothermal reaction temperature to 120°C , stop the reaction after 2h, and after the hydrothermal reactor is cooled to room temperature, WO will grow 3 The FTO conductive glass was taken out, washed with deionized water, dried in an oven at 60°C for 20min, and then calcined in a muffle furnace at 500°C for 1h to obtain WO 3 Photoelectrocatalytic electrodes.

[0038] Step 2: BiOI / WO 3 Preparation of Heterojunc...

Embodiment 2

[0041] The preparation process is the same as in Example 1, the difference is that the electrodeposition time is 60s, and BiOI / WO 3-60S Heterojunction photocatalytic electrodes.

Embodiment 3

[0043] The preparation process is the same as in Example 1, the difference is that the electrodeposition time is 90s, and BiOI / WO 3-90S Heterojunction photocatalytic electrodes.

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Abstract

The invention discloses a preparation method, product and application of BiOI/WO3 heterojunction efficient photoelectrocatalysis electrodes, and particularly relates to that a hydrothermal method is adopted firstly. WO3 films grow in situ on FTO, bismuth nitrate, potassium iodide, anhydrous ethanol and p-benzoquinone are used for preparing an electro-deposition solution according to certain raw material ratio, the electrodeposition of the BiOI is conducted on the WO3 in the electro-deposition solution to prepare the BiOI/WO3 heterojunction photoelectrocatalysis electrodes. By changing the timeof electrodeposition, BiOI/WO3 heterojunction electrodes with different shapes and thicknesses are obtained. According to the preparation method of the BiOI/WO3 heterojunction efficient photoelectrocatalysis electrodes, the prepared BiOI/WO3 heterojunction electrodes have higher activity of photoelectrocatalysis degradation of organic wastewater than pure WO3, and the preparation method has the characteristics of easy availability of raw materials, simple production processes, and the like, the heterojunction photoelectrocatalysis electrodes can be used circularly without causing secondary pollution.

Description

technical field [0001] The invention relates to the field of semiconductor photocatalytic oxidation, in particular to a BiOI / WO 3 Preparation methods, products and applications of heterojunction high-efficiency photoelectrocatalytic electrodes. Background technique [0002] The rapid development of industrialization has produced a large amount of wastewater, and organic dyes are one of the main components of wastewater. Widespread environmental and health concerns arise from organic dyes from the textile, plastic, leather and cosmetics industries. Since organic dyes absorb sunlight, chromophore dyes like methylene blue affect phytoplankton in water by inhibiting photosynthetic activity. These carcinogenic pollutants pose a threat to mammals through the food chain and direct contact with contaminated water. Many traditional water treatment methods such as biological oxidation, adsorption, photocatalysis, and flocculation-ion precipitation have been used to remove organic c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/132C02F1/30C02F101/34C02F101/36C02F101/38
CPCB01J27/132B01J35/004B01J35/0033C02F1/30C02F2101/40C02F2101/38C02F2101/36C02F2101/34C02F2305/10
Inventor 毕强高越党晨轩王增强薛娟琴唐长斌
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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