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Method for preparing fullerene self-assembled nanometer bismuth vanadate photocatalyst

A photocatalyst, fullerene technology, applied in chemical instruments and methods, light water/sewage treatment, water pollutants, etc., can solve the problems of limited light response range, unsatisfactory treatment effect, etc. The preparation method is simple and feasible, and the effect of large specific surface area

Inactive Publication Date: 2012-06-13
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, many scholars have considered TiO 2 Although the photocatalytic degradation of organic pollutants in water has achieved certain results, the treatment effect is often not ideal due to the limitation of its photoresponse range.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Add bismuth nitrate and disodium edetate into the phosphate buffer, and stir magnetically for 15 minutes to form a suspension; dissolve sodium metavanadate evenly in the phosphate buffer, and then add it dropwise to the In the above-mentioned suspension, the magnetic stirring is uniform to form a transparent solution; wherein the amount concentration of bismuth nitrate, sodium metavanate and disodium edetate is 0.01mol / L, and the phosphate buffer is composed of 0.025mol / L sodium dihydrogen phosphate and 0.05mol / L sodium hydrogen phosphate;

[0024] (2) Use a sodium hydroxide aqueous solution with a concentration of 0.5mol / L to adjust the pH value of the above-mentioned transparent solution to 4.5, and then add a certain proportion of fullerene at 60°C, wherein the mass ratio of bismuth salt to fullerene is 1 : 5, continuous magnetic stirring and mixing, reflux for 6h, centrifugation, filtration, and after washing, a yellow product can be obtained, and finally the r...

Embodiment 2

[0026] (1) Add bismuth chloride and sodium gluconate to the phosphate buffer, stir magnetically for 35 minutes to form a suspension; dissolve ammonium metavanadate evenly in the phosphate buffer, and then add it dropwise to the above suspension In the liquid, the magnetic stirring is uniform to form a transparent solution; wherein the molar concentration of bismuth chloride substance is 0.06mol / L, the molar concentration of sodium gluconate substance is 0.03mol / L, and the molar concentration of ammonium metavanitate substance is 0.06mol / L L, phosphate buffer is composed of 0.03mol / L sodium dihydrogen phosphate and 0.08mol / L sodium hydrogen phosphate;

[0027] (2) The pH value of the above-mentioned transparent solution is adjusted to 7 by an aqueous potassium hydroxide solution with a concentration of 1mol / L, and then a certain proportion of fullerenes are added at 80°C, wherein the mass ratio of bismuth salts to fullerenes is 1: 12. Continuous magnetic stirring and mixing, re...

Embodiment 3

[0029] (1) Add bismuth acetate and butane tetracarboxylic acid into the phosphate buffer, stir magnetically for 60 minutes to form a suspension; dissolve potassium metavanadate evenly in the phosphate buffer, and then add it dropwise to the above suspension In the turbid liquid, the magnetic stirring is uniform to form a transparent solution; wherein the molar concentration of bismuth acetate is 0.15mol / L, butane tetracarboxylic acid is 0.05mol / L, and potassium metavanate is 0.05mol / L. 0.15mol / L, the phosphate buffer is composed of 0.05mol / L sodium dihydrogen phosphate and 0.1mol / L sodium hydrogen phosphate;

[0030] (2) Using a sodium hydroxide aqueous solution with a concentration of 1.5mol / L to adjust the pH value of the above-mentioned transparent solution to 9, and then adding a certain proportion of fullerene at 100°C, wherein the mass ratio of bismuth salt to fullerene is 1 : 20, continuous magnetic stirring and mixing, reflux for 24h, centrifugation, filtration, and af...

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Abstract

The invention relates to a method for preparing a fullerene self-assembled nanometer bismuth vanadate photocatalyst. The method comprises the following steps of: (1) adding bismuth salt and a stabilizer into phosphate buffer, and stirring for 15 to 60 minutes to form suspension; and uniformly dissolving metavanadate in phosphate buffer, adding into the suspension, and uniformly stirring to obtain a transparent solution; and (2) regulating the pH value by using an alkaline solution, adding fullerene at the temperature of between 20 and 100 DEG C, stirring and mixing, refluxing for 6 to 24 hours, centrifuging, filtering, washing, calcining the obtained product, cooling, and grinding. The method is low in cost, simple and practicable, low in equipment requirement and high in operability; and the prepared fullerene powder bismuth vanadate is uniformly self-assembled, can efficiently degrade persistent toxic and harmful substances under the conditions of ultraviolet light and visible light, is easy and convenient to recycle, and is particularly suitable for the deep treatment of wastewater.

Description

technical field [0001] The invention belongs to the field of preparation of bismuth vanadate photocatalysts, in particular to a preparation method of fullerene self-assembled nano bismuth vanadate photocatalysts. Background technique [0002] In recent years, titanium dioxide (TiO 2 ) as the core representative of photocatalytic technology in the field of environmental pollution control, especially in the treatment of refractory biodegradable wastewater and air purification is more and more widely used, but because of its wide band gap, it can only be effective under the irradiation of ultraviolet light Photocatalysis, thus limiting the further expansion of its application field. In order to be able to increase the TiO 2 For the utilization efficiency of sunlight, many experts and scholars at home and abroad focus on TiO2 which responds to visible light. 2 A lot of research work has been carried out on photocatalysts, mainly for TiO 2 Photocatalyst surface structure modi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22C02F1/30C02F101/30
Inventor 李浩刘保江
Owner DONGHUA UNIV
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