Bismuth-amorphous bismuth tungstate-bismuth trioxide ternary organic composite photocatalyst and preparation method thereof

A technology of bismuth trioxide and bismuth tungstate, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. Narrow range, recombination of photogenerated electrons and holes, etc., to achieve the effect of improving visible light photocatalytic activity, low price, and simple preparation

Active Publication Date: 2017-06-09
CHONGQING TECH & BUSINESS UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of bismuth-amorphous bismuth tungstate-bismuth trioxide ternary organic composite photocatalyst and preparation method, to solve the bismuth photocatalyst described in background technology, because light response range is narrow, solar energy ( The low utilization rate of visible light and the serious recombination of photogenerated electrons and holes are technical problems that hinder the application of photocatalytic technology.

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  • Bismuth-amorphous bismuth tungstate-bismuth trioxide ternary organic composite photocatalyst and preparation method thereof
  • Bismuth-amorphous bismuth tungstate-bismuth trioxide ternary organic composite photocatalyst and preparation method thereof
  • Bismuth-amorphous bismuth tungstate-bismuth trioxide ternary organic composite photocatalyst and preparation method thereof

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preparation example Construction

[0047] Please refer to the attached figure 1 , the preparation method of bismuth-amorphous bismuth tungstate-bismuth trioxide ternary organic composite photocatalyst provided by the embodiment of the present invention comprises the following steps:

[0048] S101 Dissolve the precursor of bismuth element in deionized water to obtain a bismuth solution, and dissolve the precursor of tungstate in deionized water to obtain a tungstate solution;

[0049] S102 uniformly mixing the bismuth solution and the tungstate solution, and reacting at a constant temperature in an oven to obtain amorphous bismuth tungstate powder;

[0050] S103 Dissolve the reducing agent and the amorphous bismuth tungstate powder in deionized water respectively, and perform mixed magnetic stirring at room temperature, and obtain bismuth-amorphous bismuth tungstate-bismuth trioxide ternary organic compound by in-situ deposition method. composite photocatalyst.

[0051] This application adopts the in-situ depo...

Embodiment 1

[0071] 1.390g Bi(NO 3 ) 3 ·5H 2 O and 0.473g Na 2 WO 4 2H 2 O was dispersed in 40ml and 20ml of deionized water respectively, and then mixed with magnetic stirring at room temperature for 1h, transferred to an oven at 100°C for 20h with water heating, and after washing and drying, a pure phase of amorphous bismuth tungstate was obtained; according to the reducing agent NaBH 4 The molar ratio of 20% to amorphous bismuth tungstate is respectively dispersed in 20ml of deionized water, and then mixed and magnetically stirred for 30min at room temperature, and after washing and drying, bismuth-amorphous bismuth tungstate-bismuth trioxide trioxide is obtained. Yuan-organic composite photocatalyst; then packed in a sample bag for use.

[0072] The bismuth-amorphous bismuth tungstate-bismuth trioxide ternary organic composite photocatalyst prepared in the examples of the present invention was characterized by XRD, SEM, TEM, HRTEM, and UV-Vis DRS.

[0073]The bismuth-amorphous b...

Embodiment 2

[0075] 1.390g Bi(NO 3 ) 3 ·5H 2 O and 0.473g Na 2 WO 4 2H 2 O was dispersed in 40ml and 20ml of deionized water respectively, and then mixed with magnetic stirring at room temperature for 1h, transferred to an oven at 100°C for 20h with water heating, and after washing and drying, a pure phase of amorphous bismuth tungstate was obtained; according to the reducing agent NaBH 4 The molar ratio of 50% to amorphous bismuth tungstate was dispersed in 20ml of deionized water, and then mixed and magnetically stirred at room temperature for 30 minutes. After washing and drying, bismuth-amorphous bismuth tungstate-bismuth trioxide trioxide was obtained. Yuan-organic composite photocatalyst; then packed in a sample bag for use.

[0076] The characterization of the bismuth-amorphous bismuth tungstate-bismuth trioxide ternary organic composite photocatalyst prepared in the embodiment of the present invention and the degradation test process of the composite photocatalyst to NO are t...

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Abstract

The embodiment of the application provides a bismuth-amorphous bismuth tungstate-bismuth trioxide ternary organic composite photocatalyst and a preparation method thereof. The preparation method comprises the following steps: dissolving a precursor of bismuth in deionized water to obtain a bismuth solution, and dissolving a precursor of tungstateradicle in deionized water to obtain a tungstateradicle solution; uniforming mixing the bismuth solution and the tungstateradicle solution, and performing a thermostatic reaction in a drying oven to obtain amorphous bismuth tungstate powder; and respectively dissolving a reducing agent and the amorphous bismuth tungstate powder in deionized water, performing mixing and magnetic stirring under the room temperature, and adopting an in-situ deposition method to obtain the bismuth-amorphous bismuth tungstate-bismuth trioxide ternary organic composite photocatalyst. In the organic composite photocatalyst obtained by adoption of the preparation method, the simple substance Bi is loaded on the surface of bismuth tungstate in situ and forms a heterojunction together with an oxide Bi2O3 of the simple substance Bi, so that separation of photo-induced electrons from electron-hole pairs of amorphous bismuth tungstate is quickened to the utmost extent, and furthermore, the photocatalytic activity of the ternary organic composite photocatalyst is improved.

Description

technical field [0001] The invention relates to the technical field of photocatalyst preparation, and more specifically relates to a bismuth-amorphous bismuth tungstate-bismuth trioxide ternary organic composite photocatalyst 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 ox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/31B01D53/86B01D53/56
CPCB01D53/8628B01D2259/802B01J23/31B01J35/004
Inventor 董帆何文杰董兴安王红
Owner CHONGQING TECH & BUSINESS UNIV
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