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Novel bismuth selenate photocatalyst, and preparation method and application thereof

A technology of photocatalyst and bismuth selenate, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of poor recyclability of reactors, rising production costs, complicated operation methods, etc., and achieve high Practical value and application prospect, strong regeneration ability, and the effect of high-efficiency decolorization

Inactive Publication Date: 2015-12-30
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the products obtained by this method are generally accompanied by unreacted SeO 2 and Bi 2 o 3 , and the impurity product Bi 2 Se 3 o 9 and Bi 2 Se 4 o 11 , so that the purity of the sample obtained by the reaction is not high; rising costs

Method used

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  • Novel bismuth selenate photocatalyst, and preparation method and application thereof
  • Novel bismuth selenate photocatalyst, and preparation method and application thereof
  • Novel bismuth selenate photocatalyst, and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0021] Dissolve 2mmol bismuth chloride, 3mmol selenium powder, 1.0g polyvinylpyrrolidone and 0.5g citric acid in 40mL deionized water, add NaOH solution with a concentration of 0.2mol / L under rapid stirring, adjust the pH value to 8, and continue stirring After 30 min, hydrothermally reacted at 210 °C for 24 h, then cooled to room temperature, centrifuged, the precipitate was washed with distilled water and absolute ethanol, and dried under vacuum at 80 °C to obtain Bi 2 Se 3 Precursor; Weigh 0.4gBi 2 Se 3 The precursor was placed in a crucible and placed in a muffle furnace, and calcined at 500 °C for 2 h in an air atmosphere to obtain Bi 2 SeO 5 Nanoparticles are bismuth selenate photocatalysts.

Embodiment 2

[0023] Dissolve 2mmol bismuth chloride, 3mmol selenium powder, 0.08g polyvinylpyrrolidone and 0.1g citric acid in 30mL deionized water, add NaOH solution with a concentration of 0.2mol / L under rapid stirring, adjust the pH value to 10, and continue stirring After 30 min, hydrothermally reacted at 210 °C for 24 h, then cooled to room temperature, centrifuged, the precipitate was washed with distilled water and absolute ethanol, and dried under vacuum at 80 °C to obtain Bi 2 Se 3 Precursor; weigh 1gBi 2 Se 3 The precursor was placed in a crucible and placed in a muffle furnace, and calcined at 300°C for 0.5h in an air atmosphere to obtain Bi 2 SeO 5 Nanoparticles are bismuth selenate photocatalysts.

Embodiment 3

[0025] Dissolve 2mmol bismuth chloride, 3mmol selenium powder, and 0.05g polyvinylpyrrolidone in 70mL deionized water, add NaOH solution with a concentration of 0.2mol / L under rapid stirring, adjust the pH value to 9, and continue stirring for 30min. The hydrothermal reaction was carried out at ℃ for 24 h, then cooled to room temperature, centrifuged, the precipitate was washed with distilled water and absolute ethanol, and vacuum-dried at 80 ℃ to obtain Bi 2 Se 3 Precursor; Weigh 0.5gBi 2 Se 3 The precursor was placed in a crucible and placed in a muffle furnace, and calcined at 400 °C for 4 h in an air atmosphere to obtain Bi 2 SeO 5 Nanoparticles are bismuth selenate photocatalysts.

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Abstract

The invention discloses a n novel bismuth selenate photocatalyst, and a preparation method and application thereof, and belongs to the technical field of material preparation and environment pollution treatment. The bismuth selenate photocatalyst is Bi2SeO5. Bismuth chloride and selenium powder are taken as initiators, a hydro-thermal synthesis method is firstly employed for preparing a bismuth selenide precursor, and then a thermooxidizing method is employed for preparing the Bi2SeO5 nanometer particle with photocatalytic activity. The prepared bismuth selenate photocatalyst is capable of efficiently degrading organic pollutants in water and indoor formaldehyde and other VOC substances, and possesses efficient decoloring degradation effects on pollutants in printing and dyeing wastewater. The preparation technology is simple, low in cost, and green and environment-friendly in production process. The obtained catalyst is high in stability, accords with practical production demand and possesses relatively large application potential.

Description

technical field [0001] The invention belongs to the technical field of material preparation and environmental pollution control, and in particular relates to a novel bismuth selenate photocatalyst and its preparation method and application. Background technique [0002] In recent years, with the continuous development of dye synthesis, printing and dyeing industry, etc. and the extensive use of various dyes, the number and types of dyes entering the environment through various channels have continued to increase, and the environmental pollution caused by dyes has become increasingly serious. Dye wastewater has the characteristics of many refractory substances, complex organic components, high concentration, and high toxicity. At present, the traditional methods for treating this wastewater mainly include physical treatment, biological treatment and some conventional chemical treatments. These traditional treatment methods cannot completely eliminate pollutants, so it is impe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/057C02F1/30B01D53/86
CPCY02W10/37
Inventor 梁诗景吴秀琴祝淑颖毕进红吴棱
Owner FUZHOU UNIV
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