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[期刊论文]

Hollow Mesoporous WO3 Spheres: Preparation and Photocatalytic Activity

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作者:

Liu Bai-Xiong (Liu Bai-Xiong.) | Wang Jin-Shu (Wang Jin-Shu.) (学者:王金淑) | Li Hong-Yi (Li Hong-Yi.) (学者:李洪义) | 展开

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Scopus SCIE PKU CSCD

摘要:

Based on the hollow ammonium metatungstate spheres (HAMTS) prepared by spray drying method, hollow mesoporous WO3 spheres were synthesized by adjusting calcination temperature. The results show that [H2W12O40](6-) with Keggin structure in HAMTS is destroyed in the temperature of 417 to 439 degrees C. Apart from WO3, a small amount of ammonium ions and bounding water still exist in the form of (NH4)(0.06)WO3(H2O)(0.11) in the sample after being calcined at 500 or 550 degrees C. Increasing temperature to 700 degrees C for 2 h, hollow mesoporous WO3 spheres can be obtained. The mechanism for the formation of hollow mesoporous structure is proposed as follows. Due to the difference of the subgrain orientation and the preferred [002] growth, narrow particles are crystallized by integrating HAMTS subgrains during the heat treatment process, leading to the mesoporous structure on the surface of hollow WO3 spheres. When the sample is calcined at 800 degrees C for 2 h, the channels between the grains disappear. The photocatalytic degradation rate of methylene over blue hollow mesoporous WO3 spheres is 65.9% under the illumination of 500 W high pressure mercury arc for 150 min.

关键词:

photocatalysis mcsoporous hollow WO3

作者机构:

  • [ 1 ] [Liu Bai-Xiong]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 2 ] [Wang Jin-Shu]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 3 ] [Li Hong-Yi]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 4 ] [Wu Jun-Shu]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 5 ] [Li Zhi-Fei]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 6 ] [Liu Bai-Xiong]Jiangxi Univ Sci & Technol, Inst Res & Engn, Ganzhou 341000, Jiangxi, Peoples R China

通讯作者信息:

  • 王金淑

    [Wang Jin-Shu]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China

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来源 :

CHINESE JOURNAL OF INORGANIC CHEMISTRY

ISSN: 1001-4861

年份: 2012

期: 3

卷: 28

页码: 465-470

0 . 7 0 0

JCR@2022

ESI学科: CHEMISTRY;

JCR分区:4

中科院分区:4

被引次数:

WoS核心集被引频次: 9

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