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Title: Nanorods of manganese oxides: Synthesis, characterization and catalytic application

Abstract

Single-crystalline nanorods of {beta}-MnO{sub 2}, {alpha}-Mn{sub 2}O{sub 3} and Mn{sub 3}O{sub 4} were successfully synthesized via the heat-treatment of {gamma}-MnOOH nanorods, which were prepared through a hydrothermal method in advance. The calcination process of {gamma}-MnOOH nanorods was studied with the help of Thermogravimetric analysis and X-ray powder diffraction. When the calcinations were conducted in air from 250 to 1050 deg. C, the precursor {gamma}-MnOOH was first changed to {beta}-MnO{sub 2}, then to {alpha}-Mn{sub 2}O{sub 3} and finally to Mn{sub 3}O{sub 4}. When calcined in N{sub 2} atmosphere, {gamma}-MnOOH was directly converted into Mn{sub 3}O{sub 4} at as low as 500 deg. C. Transmission electron microscopy (TEM) and high-resolution TEM were also used to characterize the products. The obtained manganese oxides maintain the one-dimensional morphology similar to the precursor {gamma}-MnOOH nanorods. Further experiments show that the as-prepared manganese oxide nanorods have catalytic effect on the oxidation and decomposition of the methylene blue (MB) dye with H{sub 2}0009O.

Authors:
 [1];  [1];  [2];  [1];  [1];  [3];  [4]
  1. School of Chemical Engineering, Hefei University of Technology, Hefei, Anhui 230009 (China)
  2. School of Chemical Engineering, Hefei University of Technology, Hefei, Anhui 230009 (China). E-mail: wxzhang@hfut.edu.cn
  3. Department of Chemistry and Institute of Nano Science and Technology, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong (China)
  4. Department of Chemistry and Institute of Nano Science and Technology, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong (China). E-mail: chsyang@ust.hk
Publication Date:
OSTI Identifier:
20784909
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 179; Journal Issue: 3; Other Information: DOI: 10.1016/j.jssc.2005.11.028; PII: S0022-4596(05)00562-1; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CALCINATION; HEAT TREATMENTS; HYDROGEN PEROXIDE; MANGANESE OXIDES; METHYLENE BLUE; MONOCRYSTALS; NANOSTRUCTURES; THERMAL GRAVIMETRIC ANALYSIS; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION

Citation Formats

Yang Zeheng, Zhang Yuancheng, Zhang Weixin, Wang Xue, Qian Yitai, Wen Xiaogang, and Yang Shihe. Nanorods of manganese oxides: Synthesis, characterization and catalytic application. United States: N. p., 2006. Web. doi:10.1016/j.jssc.2005.11.028.
Yang Zeheng, Zhang Yuancheng, Zhang Weixin, Wang Xue, Qian Yitai, Wen Xiaogang, & Yang Shihe. Nanorods of manganese oxides: Synthesis, characterization and catalytic application. United States. doi:10.1016/j.jssc.2005.11.028.
Yang Zeheng, Zhang Yuancheng, Zhang Weixin, Wang Xue, Qian Yitai, Wen Xiaogang, and Yang Shihe. Wed . "Nanorods of manganese oxides: Synthesis, characterization and catalytic application". United States. doi:10.1016/j.jssc.2005.11.028.
@article{osti_20784909,
title = {Nanorods of manganese oxides: Synthesis, characterization and catalytic application},
author = {Yang Zeheng and Zhang Yuancheng and Zhang Weixin and Wang Xue and Qian Yitai and Wen Xiaogang and Yang Shihe},
abstractNote = {Single-crystalline nanorods of {beta}-MnO{sub 2}, {alpha}-Mn{sub 2}O{sub 3} and Mn{sub 3}O{sub 4} were successfully synthesized via the heat-treatment of {gamma}-MnOOH nanorods, which were prepared through a hydrothermal method in advance. The calcination process of {gamma}-MnOOH nanorods was studied with the help of Thermogravimetric analysis and X-ray powder diffraction. When the calcinations were conducted in air from 250 to 1050 deg. C, the precursor {gamma}-MnOOH was first changed to {beta}-MnO{sub 2}, then to {alpha}-Mn{sub 2}O{sub 3} and finally to Mn{sub 3}O{sub 4}. When calcined in N{sub 2} atmosphere, {gamma}-MnOOH was directly converted into Mn{sub 3}O{sub 4} at as low as 500 deg. C. Transmission electron microscopy (TEM) and high-resolution TEM were also used to characterize the products. The obtained manganese oxides maintain the one-dimensional morphology similar to the precursor {gamma}-MnOOH nanorods. Further experiments show that the as-prepared manganese oxide nanorods have catalytic effect on the oxidation and decomposition of the methylene blue (MB) dye with H{sub 2}0009O.},
doi = {10.1016/j.jssc.2005.11.028},
journal = {Journal of Solid State Chemistry},
number = 3,
volume = 179,
place = {United States},
year = {Wed Mar 15 00:00:00 EST 2006},
month = {Wed Mar 15 00:00:00 EST 2006}
}