Preparation method of a sulfur-doped ceria mesoporous hollow sphere photocatalyst

Abstract

The invention discloses a preparation method of sulfur-doped cerium dioxide mesoporous hollow sphere photocatalysts, relates to a preparation method of cerium dioxide mesoporous hollow sphere photocatalysts, and aims to overcome defects that existing cerium dioxide is small in specific surface area, large in particle size, non-uniform in pore diameter and low in photocatalytic activity. The method comprises the steps as follows: I, preparing a cerium source water solution; II, adding a sulfur source; III, adding a surfactant; IV, realizing a hydrothermal reaction; V, separating, washing and drying; and VI, roasting. The method has the advantages as follows: I, specific surface areas of the sulfur-doped cerium dioxide mesoporous hollow sphere photocatalysts prepared with the method are in a range of 60 m<2> / g-120 m<2> / g, and diameters are in a range of 250 nm-850 nm; and II, pore diameters of the sulfur-doped cerium dioxide mesoporous hollow sphere photocatalysts prepared with the method are uniform, and degradation rates on pollutants within 4 h under the irradiation of visible light are in a range of 85-98%. According to the method, the sulfur-doped cerium dioxide mesoporous hollow sphere photocatalysts can be obtained.

Description

technical field [0001] The invention relates to a preparation method of ceria mesoporous hollow sphere photocatalyst. Background technique [0002] Cerium dioxide is an inexpensive and versatile rare earth oxide. Due to its relatively stable chemical properties, strong oxygen absorption and oxygen release ability, and good absorption in the visible and near ultraviolet regions, it is widely used in luminescent materials, polishing agents, ultraviolet absorbers, automobile exhaust absorption catalysts, electronics, etc. Ceramics, etc., especially it has relatively good photocatalytic and thermal catalytic activity, and can be well applied in photolysis of water and fuel cells. However, due to its small specific surface area, the low dispersion of active components affects the improvement of catalytic activity. [0003] In order to improve its catalytic activity, on the one hand, people are committed to studying various morphologies, such as layered structures, nanocubes, na...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the shortcomings of the existing ceria with small specific surface area, large particle size, non-uniform pore size and low photocatalytic activity, and provide a preparation method of sulfur-doped ceria mesoporous hollow sphere photocatalyst

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