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Title: Preparation, characterization and photocatalytic applications of amine-functionalized mesoporous silica impregnated with transition-metal-monosubstituted polyoxometalates

Abstract

Amine-functionalized mesoporous silica materials impregnated with transition-metal-monosubstituted polyoxometalates, K{sub 5}[M(H{sub 2}O)PW{sub 11}O{sub 39}]-(EtO){sub 3}SiCH{sub 2}CH{sub 2}CH{sub 2}NH{sub 2}-MCM-48 (M = Co/Ni), were prepared by coordination of nickel/cobalt centers in the clusters with the amine surface groups in amine-functionalized mesoporous silica supports. The materials obtained were characterized by powder X-ray diffraction (XRD), UV-vis diffuse reflectance spectra (UV-vis-DR), infrared (IR) spectra, magic-angle spinning {sup 31}P MAS NMR, transmission electron microscopy (TEM) and nitrogen adsorption measurements, indicating that the primary Keggin structures remained intact in as-prepared composites, and the composites possessed mesoporous structures. The composites exhibited UV-photocatalytic activity to degrade dye rhodamine B (RB), and the pesticides including hexachlorobenzene (HCB) and methylparathion (MPT). Leakage of K{sub 5}[M(H{sub 2}O)PW{sub 11}O{sub 39}] from the support was hardly observed during the photocatalytic tests, attributed to strong coordination interactions between the Keggin units and the amine-functionalized silica surface. -- Graphical abstract: The K{sub 5}[M(H{sub 2}O)PW{sub 11}O{sub 39}]-(EtO){sub 3}SiCH{sub 2}CH{sub 2}CH{sub 2}NH{sub 2}-SiO{sub 2} composites were prepared by coordination of M centers in the Keggin units with the amine surface groups in amine-functionalized mesoporous silica supports, and the composites exhibited photocatalytic activity to degrade aqueous rhodamine B, hexachlorobenzene and methyl parathion.

Authors:
 [1];  [2];  [3];  [1];  [1];  [4]
  1. Faculty of Chemistry, Northeast Normal University, Changchun 130024 (China)
  2. Department of Chemistry, Changchun Teacher's College, Changchun 130032 (China)
  3. College of Material and Chemical Engineering, Changchun University of Science and Technology, Changchun 130024 (China)
  4. Department of Chemistry, Beijing Institute of Technology, Beijing 100081 (China)
Publication Date:
OSTI Identifier:
20891622
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 41; Journal Issue: 2; Other Information: DOI: 10.1016/j.materresbull.2005.08.013; PII: S0025-5408(05)00319-3; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION SPECTROSCOPY; ADSORPTION; AMINES; DYES; INFRARED SPECTRA; M CENTERS; PARATHION; PHOTOCATALYSIS; SILICA; SILICON OXIDES; TRANSMISSION ELECTRON MICROSCOPY

Citation Formats

Li, Li, Faculty of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, Liu, Chunming, Aifang, Geng, Chunjie, Jiang, Yihang, Guo, and Changwen, Hu. Preparation, characterization and photocatalytic applications of amine-functionalized mesoporous silica impregnated with transition-metal-monosubstituted polyoxometalates. United States: N. p., 2006. Web. doi:10.1016/j.materresbull.2005.08.013.
Li, Li, Faculty of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, Liu, Chunming, Aifang, Geng, Chunjie, Jiang, Yihang, Guo, & Changwen, Hu. Preparation, characterization and photocatalytic applications of amine-functionalized mesoporous silica impregnated with transition-metal-monosubstituted polyoxometalates. United States. doi:10.1016/j.materresbull.2005.08.013.
Li, Li, Faculty of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, Liu, Chunming, Aifang, Geng, Chunjie, Jiang, Yihang, Guo, and Changwen, Hu. Thu . "Preparation, characterization and photocatalytic applications of amine-functionalized mesoporous silica impregnated with transition-metal-monosubstituted polyoxometalates". United States. doi:10.1016/j.materresbull.2005.08.013.
@article{osti_20891622,
title = {Preparation, characterization and photocatalytic applications of amine-functionalized mesoporous silica impregnated with transition-metal-monosubstituted polyoxometalates},
author = {Li, Li and Faculty of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006 and Liu, Chunming and Aifang, Geng and Chunjie, Jiang and Yihang, Guo and Changwen, Hu},
abstractNote = {Amine-functionalized mesoporous silica materials impregnated with transition-metal-monosubstituted polyoxometalates, K{sub 5}[M(H{sub 2}O)PW{sub 11}O{sub 39}]-(EtO){sub 3}SiCH{sub 2}CH{sub 2}CH{sub 2}NH{sub 2}-MCM-48 (M = Co/Ni), were prepared by coordination of nickel/cobalt centers in the clusters with the amine surface groups in amine-functionalized mesoporous silica supports. The materials obtained were characterized by powder X-ray diffraction (XRD), UV-vis diffuse reflectance spectra (UV-vis-DR), infrared (IR) spectra, magic-angle spinning {sup 31}P MAS NMR, transmission electron microscopy (TEM) and nitrogen adsorption measurements, indicating that the primary Keggin structures remained intact in as-prepared composites, and the composites possessed mesoporous structures. The composites exhibited UV-photocatalytic activity to degrade dye rhodamine B (RB), and the pesticides including hexachlorobenzene (HCB) and methylparathion (MPT). Leakage of K{sub 5}[M(H{sub 2}O)PW{sub 11}O{sub 39}] from the support was hardly observed during the photocatalytic tests, attributed to strong coordination interactions between the Keggin units and the amine-functionalized silica surface. -- Graphical abstract: The K{sub 5}[M(H{sub 2}O)PW{sub 11}O{sub 39}]-(EtO){sub 3}SiCH{sub 2}CH{sub 2}CH{sub 2}NH{sub 2}-SiO{sub 2} composites were prepared by coordination of M centers in the Keggin units with the amine surface groups in amine-functionalized mesoporous silica supports, and the composites exhibited photocatalytic activity to degrade aqueous rhodamine B, hexachlorobenzene and methyl parathion.},
doi = {10.1016/j.materresbull.2005.08.013},
journal = {Materials Research Bulletin},
issn = {0025-5408},
number = 2,
volume = 41,
place = {United States},
year = {2006},
month = {2}
}