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Bismuth-tungstate-modified antimony-doped stannic oxide compound photoelectrocatalysis electrode, preparing method and application

A technology of tin dioxide and photoelectric catalysis, which is applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problems of low photocatalytic efficiency and achieve electrocatalytic performance Improvement, improvement of processing efficiency, effect of photocurrent increase

Active Publication Date: 2019-05-21
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the photoelectrocatalytic efficiency of existing antimony-doped tin dioxide electrodes is low, and how to obtain antimony-doped tin dioxide electrodes with high catalytic efficiency has become a research hotspot in the field of wastewater treatment.

Method used

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  • Bismuth-tungstate-modified antimony-doped stannic oxide compound photoelectrocatalysis electrode, preparing method and application
  • Bismuth-tungstate-modified antimony-doped stannic oxide compound photoelectrocatalysis electrode, preparing method and application
  • Bismuth-tungstate-modified antimony-doped stannic oxide compound photoelectrocatalysis electrode, preparing method and application

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Experimental program
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Effect test

Embodiment 1

[0041] In this example, the preparation method of bismuth tungstate modified antimony-doped tin dioxide composite photoelectrocatalytic electrode is as follows:

[0042] S1. Dissolve 2 mmol of bismuth nitrate pentahydrate in 30 mL of water, stir and sonicate for 30 min to obtain solution A;

[0043] Dissolve 1mmol sodium tungstate dihydrate in 20mL ethylene glycol, stir and sonicate for 30min to obtain solution B;

[0044] Solution B was dripped into solution A at a rate of 0.3mL / min under ultrasonic conditions and mixed to obtain solution C;

[0045] Transfer solution C to a hydrothermal reaction kettle, react at 180°C for 12h, take it out and cool to room temperature, filter the obtained product with suction, wash with water and ethanol three times, and then dry at 80°C for 12h to obtain bismuth tungstate (in Bi 2 WO 6 meter), the product was placed in a crucible, and calcined at 450°C for 3h;

[0046] S2, citric acid, ethylene glycol, tin tetrachloride pentahydrate, ant...

Embodiment 2

[0053] In order to test the bismuth tungstate prepared in Example 1 to modify the antimony-doped tin dioxide composite photoelectrocatalytic electrode to the degradation effect of ciprofloxacin, adopt the following method to test:

[0054] Preparation concentration is 100mL of ciprofloxacin simulated waste water of 30mg / L, add 25g / L sodium sulfate as electrolyte, the electrode prepared in Example 1 is used as anode, stainless steel is used as cathode, and the control current density is 15mA / cm 2 . Stir in the dark for 30 minutes, turn on the light source and power on at the same time, take samples every 15 minutes, measure the concentration of ciprofloxacin, and record the data. Figure 4 It is the time-varying curve of the degradation of ciprofloxacin by the composite photoelectrocatalytic electrode of Example 1. The results show that after light irradiation for 60min, the electrode prepared in Example 1 can remove more than 90% of ciprofloxacin, while the unmodified antimon...

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Abstract

The invention relates to a bismuth-tungstate-modified antimony-doped stannic oxide compound photoelectrocatalysis electrode, a preparing method and application, and belongs to the field of photoelectrocatalysis. The compound photoelectrocatalysis electrode is an electrode composed of bismuth tungstate and antimony-doped stannic oxide, wherein the mole ratio of the stannic oxide to the bismuth tungstate is 9:(0.1-2). The preparing method of the bismuth-tungstate-modified antimony-doped stannic oxide compound photoelectrocatalysis electrode comprises the steps of adopting a hydrothermal synthesis method for synthesizing bismuth tungstate powder, after high-temperature treatment, adding bismuth tungstate when tin-antimony sol gel is prepared, and adopting a sol gel coating thermal decomposition method for preparing the compound photoelectrocatalysis electrode. It is shown through photoelectric property experiments that the compound photoelectrocatalysis electrode has a higher catalytic activity and photoelectric current relative to the antimony-doped stannic oxide electrode, and has a potential application prospect in the field of solar energy utilization and wastewater treatment.

Description

technical field [0001] The invention relates to a bismuth tungstate-modified antimony-doped tin dioxide composite photoelectric catalysis electrode, a preparation method and an application thereof, and belongs to the technical field of photoelectric catalysis electrodes. Background technique [0002] Industrial production and agricultural development have produced a large amount of wastewater containing persistent refractory organic compounds, causing serious pollution to the environment. Traditional wastewater treatment processes are mainly biological treatment methods, which cannot completely remove pesticides or antibiotics from water bodies. Titanium-based antimony-doped tin dioxide electrode has a good effect on the treatment of organic wastewater. It has the characteristics of cheap and easy to obtain, excellent catalytic performance, good electrical conductivity and chemical stability, and is widely used in the field of electrocatalytic wastewater treatment. However,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/31B01J37/34B01J37/10B01J37/08C02F1/461C02F1/30C02F1/72C02F101/30
Inventor 黄聪李海普杨兆光慕彦光姚晶晶
Owner CENT SOUTH UNIV
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