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

A mesoporous hollow sphere, ceria technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of low photocatalytic activity, small specific surface area, non-uniform pore size, etc. Achieve effective degradation, increase specific surface area, and uniform pore size distribution

Inactive Publication Date: 2015-09-09
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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

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specific Embodiment approach 1

[0022] Embodiment 1: This embodiment is a preparation method of sulfur-doped ceria mesoporous hollow sphere photocatalyst, which is specifically completed according to the following steps:

[0023] 1. Preparation of cerium source aqueous solution: dissolving cerium source in distilled water to obtain cerium source aqueous solution;

[0024] The mass of the cerium source described in step 1 and the volume ratio of distilled water are 1g:(160mL~170mL);

[0025] 2. Add sulfur source: add sulfur source to cerium source aqueous solution, stir until sulfur source is dissolved in cerium source aqueous solution, obtain cerium source / sulfur source aqueous solution;

[0026] The mass ratio of the mass of the cerium source in the aqueous solution of the cerium source described in step 2 to the mass ratio of the sulfur source is 1:(1.5~3);

[0027] 3. Adding a surfactant: adding a surfactant to the cerium source / sulfur source aqueous solution, stirring evenly to obtain a mixed solution; ...

specific Embodiment approach 2

[0034] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the source of cerium in step 1 is cerium nitrate. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0035] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the volume ratio of the mass of the cerium source described in step 1 to the distilled water is 1g:(165mL-170mL). Other steps are the same as those in Embodiment 1 or 2.

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/04B01J35/10C02F1/30C02F101/34
Inventor 陈亚杰付宏刚田国辉肖玉婷孙明悦
Owner HEILONGJIANG UNIV
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