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Rhodium-loaded bismuth venerate with efficient photocatalytic water splitting oxygen production performance and preparation method and application of rhodium-loaded bismuth vanadate

A bismuth vanadate and photocatalytic technology, applied in the field of rhodium-supported bismuth vanadate, can solve the problems of slow water oxidation kinetics, internal charge separation, high charge recombination rate, etc., and achieves mild conditions, mild synthesis conditions, and simple synthesis operations. Effect

Inactive Publication Date: 2020-02-18
EAST CHINA UNIV OF SCI & TECH
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Problems solved by technology

However, bismuth vanadate as a semiconductor material still suffers from internal charge separation, low transport efficiency, high charge recombination rate, and slow water oxidation kinetics.

Method used

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  • Rhodium-loaded bismuth venerate with efficient photocatalytic water splitting oxygen production performance and preparation method and application of rhodium-loaded bismuth vanadate
  • Rhodium-loaded bismuth venerate with efficient photocatalytic water splitting oxygen production performance and preparation method and application of rhodium-loaded bismuth vanadate
  • Rhodium-loaded bismuth venerate with efficient photocatalytic water splitting oxygen production performance and preparation method and application of rhodium-loaded bismuth vanadate

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Embodiment 1

[0031] Step 1, preparation of rhodium-loaded bismuth vanadate

[0032] Synthesize BiVO first 4 : Mo, K 2 CO 3 , V2 o 5 、MoO 3 Mix well according to Mo / V=0.05mol%, K / V=166.6mol%, and calcined at 450°C in air for 5 hours to form layered Mo-doped K 3 V 5 o 14 , while Bi(NO 3 ) 3 ·5H 2 O reaction with deionized water to form slightly soluble BiONO 3 . Mo-doped K 3 V 5 o 14 Powder and BiONO 3 The suspension of the solution was gently stirred at room temperature for 3 days. The resulting bright yellow powder collected by filtration is BiVO 4 : Mo, washed three times with deionized water, and dried under vacuum at 60 °C overnight. For Rh loading, 200mg BiVO 4 :Mo powder and 600 μL RhCl 3 The solution (2 mg Rh / mL) was added to 10 mL of deionized water, and the pH of the solution was controlled at around 13 with NaOH. After vigorous stirring at room temperature for 4 h, the solution was centrifuged and washed three times with deionized water, then freeze-dried in a ...

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Abstract

The invention relates to rhodium-loaded bismuth vanadate with efficient photocatalytic water splitting oxygen production performance and a preparation method and application of the rhodium-loaded bismuth vanadate. According to the preparation method, a liquid phase method is utilized to synthesize bismuth vanadate in a monoclinic crystal form, then RhCl<3> is loaded to the surface of the bismuth vanadate through a quasi-impregnation method, and a small-sized cluster with the Rh loading state being metal rhodium and oxidized rhodium coexistence is obtained through hydrogen-argon mixed gas thermal treatment, wherein the loading state is the key to improving the photocatalytic oxygen production performance of the bismuth vanadate, the optimal oxygen production performance is 7,224+ / -380 micron-mol g<-1>h<-1>, and the apparent quantum yield (AQY) at 420nm wavelength is 29.19+ / -1.05%. The bismuth vanadate with the efficient photocatalytic oxygen production performance can serve as an oxygenproduction end material of a photocatalytic total-water-splitting Z system, plays an important role in promoting further device production from a photocatalytic material, and has quite broad application prospects in the fields of environmental science and new energy.

Description

technical field [0001] The invention relates to a rhodium-loaded bismuth vanadate with high-efficiency photocatalytic decomposition of water and oxygen production performance, and a preparation method and application thereof. The loading state of Rh is the key to effectively improving material performance. As a photocatalytic oxygen generation material, it has high photocatalytic oxygen generation performance. In the future, it will be used as the oxygen-generating terminal material of the photocatalytic Z system, which is expected to promote the further realization of deviceization and industrialization of photocatalytic materials, and has very important prospects in the fields of environmental science and new energy. Background technique [0002] At present, the energy crisis and environmental problems are one of the important problems that need to be solved urgently in the world. Photocatalytic water splitting to generate clean energy is one of the most potential and att...

Claims

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Application Information

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IPC IPC(8): B01J23/652C01B13/02
CPCB01J23/6525B01J23/002C01B13/02B01J2523/00B01J35/39B01J2523/54B01J2523/55B01J2523/68B01J2523/822
Inventor 杨化桂王立杰刘鹏飞袁海洋侯宇杨晓华刘袁微
Owner EAST CHINA UNIV OF SCI & TECH
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