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Preparation method of amorphous iron oxyhydroxide/bismuth vanitate composite photocatalytic material

A kind of bismuth vanadate catalytic material, composite photocatalytic technology

Active Publication Date: 2022-04-08
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Application Information

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Problems solved by technology

Among them, due to the narrower forbidden band width of the amorphous structure, the lack of ordered atomic arrangement, and more defects

Method used

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  • Preparation method of amorphous iron oxyhydroxide/bismuth vanitate composite photocatalytic material
  • Preparation method of amorphous iron oxyhydroxide/bismuth vanitate composite photocatalytic material
  • Preparation method of amorphous iron oxyhydroxide/bismuth vanitate composite photocatalytic material

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Embodiment

[0033] Weigh 5 mmol Bi(NO3)3·5H2O (analytical grade) and dissolve in 5 mL of 3 mol·L-1 HNO3 solution and 15 mL of ethylene glycol mixed solution to prepare A solution, weigh 5 mmol NH4VO3 (analytical Pure) was dissolved in 20 mL of hot water added with 0.4 g of sodium dodecylbenzenesulfonate (SDBS) to prepare solution B. After each stirring at room temperature for 30 min, solution A was added dropwise to solution B, the pH value was adjusted to 6 using NaOH solution with a concentration of 1 mol L-1, and the mixed solution was stirred for 30 min to obtain the BiVO4 catalyst precursor. Transfer the obtained solution into a 100 mL autoclave lined with polytetrafluoroethylene, seal it, put it in an oven, conduct a hydrothermal reaction at 200 °C for 22 hours, cool it down to room temperature naturally, and wash it repeatedly with distilled water and absolute ethanol for more than 3 times , Dry at a constant temperature at 60°C for 6h, and grind it with a mortar after cooling to o...

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Abstract

The invention belongs to the field of photocatalyst preparation, and particularly relates to a preparation method of an amorphous iron oxyhydroxide / bismuth vanadate composite photocatalytic material. The process steps of the amorphous iron oxyhydroxide / bismuth vanadate are as follows: the bismuth vanadate is synthesized by a hydrothermal method, and The synthesized bismuth vanadate is used as a substrate, the bismuth vanadate is put into a mixed solution of ferric chloride and ammonium bicarbonate, stirred, centrifuged and dried, and the obtained product is an amorphous iron oxyhydroxide / bismuth vanadate composite photocatalyst. The invention uses the amorphous material as the cocatalyst, and because of the special structure of the amorphous itself, it lacks orderly arrangement of atoms and has a narrower band gap. These characteristics make the surface of the catalyst produce more defects, provide more active sites, and expand the range of light absorption, thereby improving the photocatalytic performance.

Description

technical field [0001] The invention belongs to the field of photocatalyst preparation, in particular to a method for preparing an amorphous iron oxyhydroxide / bismuth vanitate composite photocatalyst material. Background technique [0002] Photocatalytic water splitting is one of the important methods for solar energy production. Today's co-catalysts for photolysis of water include Pt, Au, Pt / g-C3N4 and other noble metals and noble metal composites. Although the photocatalytic performance is relatively improved, the huge cost also limits its application space. Therefore, people turn their attention to non-precious metal cocatalysts. For example: Fe, Co, Ni, Cu, Zn and carbon-based materials (CoS, Ni(OH)2, NiS, Cu2O, ZnIn2S4 and carbon quantum dots, etc.). However, these co-catalysts are all in the form of crystals to improve the photocatalytic performance, which also reveals that these co-catalysts are strongly dependent on the crystal structure and morphology, especially ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/847B01J37/10C01B13/02
Inventor 杨占旭张莹石磊谭文
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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