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Preparation method of BiOCl-TiO2/Sb2S3 composite photocatalyst

A technology of composite photocatalytic glue and catalyst, applied in catalyst activation/preparation, physical/chemical process catalyst, chemical instrument and method, etc., can solve the problems of instability, low utilization rate of light energy, easy decomposition of harmful substances, etc. Achieve high stability, uniform distribution, and improve photocatalytic performance.

Inactive Publication Date: 2018-04-03
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Photocatalytic degradation has become a research hotspot in the treatment of organic pollutants because of its advantages such as mild reaction conditions, no secondary pollution, and direct use of solar energy; the problem in the prior art is that traditional equal-bandgap photocatalysts often only It can absorb and utilize ultraviolet light, which accounts for a small proportion of sunlight, and has low utilization rate of light energy, while narrow-bandgap photocatalysts such as cadmium sulfide are usually unstable and easy to decompose harmful substances

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A BiOCl-TiO 2 / Sb 2 S 3 The preparation method of composite photocatalyst, this method comprises the following steps:

[0015] Step 1, at room temperature, 9mol BiCl 3 and 3mol TiO 2 / Sb 2 S 3 The composite photocatalytic colloid is soluble in a concentration of 1mol L -1 dilute nitric acid solution, and then use a concentration of 4mol L -1 The pH value of the mixed solution was adjusted to 14 with NaOH solution, stirred and aged for 2 hours, and the suspension containing the precipitate was transferred to a reaction kettle and heated in an oven at 220°C for 24 hours. After the precipitate obtained by the hydrothermal method was centrifuged and dried, the yellow powder product Bi was obtained. 2 o 3 -TiO 2 / Sb 2 S 3 ;

[0016] Step 2, dilute concentrated hydrochloric acid with a mass fraction of 38% to obtain 0.2mol L -1 The dilute hydrochloric acid aqueous solution, take the above yellow powder, put it into the dilute hydrochloric acid solution and magne...

Embodiment 2

[0023] Step 1, at room temperature, 9mol BiCl 3 and 1mol TiO 2 / Sb 2 S 3 The composite photocatalytic colloid is soluble in a concentration of 1mol L -1 dilute nitric acid solution, and then use a concentration of 4mol L -1 The pH value of the mixed solution was adjusted to 14 with NaOH solution, stirred and aged for 2 hours, and the suspension containing the precipitate was transferred to a reaction kettle and heated in an oven at 220°C for 24 hours. After the precipitate obtained by the hydrothermal method was centrifuged and dried, the yellow powder product Bi was obtained. 2 o 3 -TiO 2 / Sb 2 S 3 ;

[0024] All the other steps are the same as in Example 1.

Embodiment 3

[0026] Step 1, at room temperature, 9mol BiCl 3 and 0.5mol TiO 2 / Sb 2 S 3 The composite photocatalytic colloid is soluble in a concentration of 1mol L -1 dilute nitric acid solution, and then use a concentration of 4mol L -1 The pH value of the mixed solution was adjusted to 14 with NaOH solution, stirred and aged for 2 hours, and the suspension containing the precipitate was transferred to a reaction kettle and heated in an oven at 220°C for 24 hours. After the precipitate obtained by the hydrothermal method was centrifuged and dried, the yellow powder product Bi was obtained. 2 o 3 -TiO 2 / Sb 2 S 3 ;

[0027] All the other steps are the same as in Example 1.

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Abstract

The invention discloses a preparation method of a BiOCl-TiO2 / Sb2S3 composite photocatalyst. According to the preparation method, with titanium butoxide, anhydrous ethanol, yttrium oxide, hydrochloricacid, H2S, BiCl3 and TiO2 / Sb2S3 as main raw materials, nanometer bismuth particles are produced in situ through combination of a solvothermal method and a hydrothermal method; the nanometer bismuth particles are uniformly distributed and densely bonded, so that the bismuth oxychloride composite photocatalyst has relatively high stability; the bismuth modification amount can be controlled by adjusting the temperature, the using amount of a reducing agent and other conditions; a preparation technology of the BiOCl-TiO2 / Sb2S3 composite photocatalyst is novel; by the preparation method, a good visible light degrading effect is achieved, and the cost and the pollution can be reduced; the preparation method has a good application prospect and good economic benefits in decomposition of organic pollutants.

Description

technical field [0001] The present invention relates to a kind of BiOCl-TiO 2 / Sb 2 S 3 A composite photocatalyst and a preparation method thereof belong to the technical field of catalysts. Background technique [0002] Photocatalytic technology refers to the catalyst that converts light energy into the energy required for chemical reactions under light conditions, and then produces catalytic action. It is a new type of high-efficiency energy-saving and environmental protection technology. Photocatalytic degradation is the use of light radiation to generate active free radicals in the reaction system, and decompose organic pollutants into non-toxic or low-toxic inorganic substances through processes such as addition, substitution, and electron transfer with organic pollutants. Photocatalytic degradation has become a research hotspot in the treatment of organic pollutants because of its advantages such as mild reaction conditions, no secondary pollution, and direct use of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/135B01J37/10C02F1/30
CPCC02F1/30B01J27/135B01J37/10C02F2101/308C02F2305/10B01J35/39
Inventor 高光珍
Owner XUZHOU NORMAL UNIVERSITY
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