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Carbonate-bismuth oxyiodide compound catalyst and preparation method thereof

A technology of bismuth iodide and catalyst, applied in the field of catalysis, can solve the problems of hindering the application of photocatalysis technology, low photon conversion efficiency, low solar energy utilization rate, etc., and achieve the effects of excellent catalytic performance, increased specific surface area, and increased light absorption efficiency.

Inactive Publication Date: 2017-06-09
CHONGQING TECH & BUSINESS UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the bismuth-based semiconductor photocatalysts prepared by the prior art have low light quantum conversion efficiency, narrow photoresponse range, and low utilization rate of solar energy (visible light), which hinder the application of photocatalytic technology.

Method used

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  • Carbonate-bismuth oxyiodide compound catalyst and preparation method thereof
  • Carbonate-bismuth oxyiodide compound catalyst and preparation method thereof
  • Carbonate-bismuth oxyiodide compound catalyst and preparation method thereof

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preparation example Construction

[0045]figure 1 The preparation method of a kind of barium carbonate-bismuth oxyiodide composite photocatalyst shown for the embodiment of the application, said method comprises:

[0046] S101 adding bismuth nitrate pentahydrate into the solvent and stirring to obtain the first intermediate of milky white suspension;

[0047] S102 adding barium carbonate powder into the first intermediate of the milky white suspension, and stirring to obtain the second intermediate of the milky white suspension;

[0048] S103 adding potassium iodide solution dropwise to the milky white suspension second intermediate, stirring to obtain a precipitate;

[0049] S104 washing the precipitate with water and alcohol, and drying to obtain a barium carbonate-bismuth oxyiodide composite photocatalyst.

[0050] figure 2 The preparation method of a kind of strontium carbonate-bismuth oxyiodide composite photocatalyst shown for the embodiment of the present application, the method comprises:

[0051] S...

Embodiment 1

[0076] 1) After barium carbonate and bismuth nitrate pentahydrate were weighed according to the stoichiometric ratio of 6:3, bismuth nitrate pentahydrate was added to water and ethylene glycol mixed uniformly at a volume ratio of 9:1, and stirred for 30 minutes to obtain a milky white suspension. Turbid liquid first intermediate;

[0077] 2) adding pure-phase barium carbonate powder into the first intermediate of the milky white suspension, and stirring for 30 minutes to obtain the second intermediate of the milky white suspension;

[0078] 3) Add the dissolved potassium iodide solution dropwise to the second intermediate of the milky white suspension, stir for 2 hours, and then precipitate to obtain a barium carbonate-bismuth oxyiodide composite photocatalyst.

[0079] The barium carbonate and bismuth nitrate pentahydrate prepared in the examples of the present application were characterized by XRD, SEM, TEM, HRTEM, PL, UV-VisDRS, and XPS according to the barium carbonate-bis...

Embodiment 2

[0082] 1) After barium carbonate and bismuth nitrate pentahydrate were weighed according to the stoichiometric ratio of 6:4, bismuth nitrate pentahydrate was added to water and ethylene glycol mixed uniformly at a volume ratio of 9:1, and stirred for 30 minutes to obtain a milky white suspension. Turbid liquid first intermediate;

[0083] 2) adding pure-phase barium carbonate powder into the first intermediate of the milky white suspension, and stirring for 30 minutes to obtain the second intermediate of the milky white suspension;

[0084] 3) adding the dissolved potassium iodide solution dropwise to the second intermediate of the milky white suspension, stirring for 2 hours and then precipitating to obtain a barium carbonate-bismuth oxyiodide composite photocatalyst.

[0085] The characterization of the barium carbonate-bismuth oxyiodide composite photocatalyst with a stoichiometric ratio of 6:4 prepared by the barium carbonate and bismuth nitrate pentahydrate prepared in th...

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Abstract

The invention provides a carbonate-bismuth oxyiodide compound catalyst and a preparation method thereof. The preparation method in the embodiment of the invention comprises the following steps: compounding barium carbonate or strontium carbonate with bismuth oxyiodide through a chemical precipitation method, and thus obtaining a barium carbonate-bismuth oxyiodide compound photo-catalyst or a strontium carbonate-bismuth oxyiodide compound photo-catalyst. According to the preparation method in the embodiment of the invention, a heterojunction formed by the prepared compound photo-catalyst has a matched energy gap, and is beneficial to separation and transmission of photo-induced electrons; photo-response is expanded to a visible region from an ultraviolet region, and the photo-absorption efficiency is improved; moreover, increased specific surface area is beneficial to adsorption of pollutants and generation of reaction sites, so that the catalyst has an excellent catalytic performance under visible light, and the preparation of the photo-catalytic material is expanded.

Description

technical field [0001] The embodiments of the present application relate to the technical field of catalysis, and in particular to a carbonate-bismuth oxyiodide composite catalyst and a preparation method thereof. Background technique [0002] With the advancement of human science and technology civilization, the industry has developed on a large scale, and automobiles have become more and more popular, and a large amount of nitrogen oxides have been discharged into the atmosphere. Nitrogen oxides are pollutants of photochemical smog, acid rain, and ozone layer destruction. Nitrogen oxides have become air pollutants that need to be solved urgently in countries all over the world. Visible light-driven photocatalysis, as an environmentally friendly green technology, has shown good application prospects in both environmental pollution purification and solar energy conversion. The photocatalytic method driven by visible light can oxidize nitrogen oxides under the action of phot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/232B01D53/86B01D53/56
CPCB01D53/8628B01J27/232B01D2257/404B01J35/39
Inventor 董帆王红崔雯张育新
Owner CHONGQING TECH & BUSINESS UNIV
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