Hydrothermal Synthesis of MnO2 with Different Crystal Phases for Catalytic Combustion Property of Dimethyl Ether-中国粉体技术

Journal Online 2016 Vol.22

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Hydrothermal Synthesis of MnO2 with Different Crystal Phases for Catalytic Combustion Property of Dimethyl Ether

CHEN Guorong¹, CHEN Linfeng¹, LAN Bang^{1, 2}, CHENG Gao¹, LIU Wenxiu¹, SUN Ming¹, YU Qian¹, YU Lin¹

（1. School of Chemical Engineering and Light Industry， Guangdong University of Technology， Guangzhou 510006， China； 2. Guangdong Meizhou Quality ＆ Metrology Supervision and Testing Institution， Meizhou 514072， China）

Abstract：Manganese dioxide with different crystal phases were synthesized by different oxidants through a hydrothermal method. The synthesized MnO₂ samples were characterized by XRD, SEM, H₂-temperature programmed reduction, N₂ adsorption-disadsortion and XPS techniques. The results show that when K₂S₂O₈ or Na₂S₂O₈ are used as the oxidant, the products are α-MnO₂ and β-MnO₂ respectively, due to the inductive effect of K⁺. α-MnO₂ has better low-temperature activity and higher oxygen vacancy concentration than β-MnO₂, so α-MnO₂ exhibits better catalytic activity in dimethyl ether catalytic combustion.

Keywords: manganese dioxide; hydrothermal method; dimethyl ether; catalytic combustion

中图分类号：TQ426.62 文献标志码：A

文章编号：1008-5548（2016）02-0014-04

DOI：10.13732/j.issn.1008-5548.2016.02.004

收稿日期：2015-07-31，修回日期：2015-09-01，在线出版时间：2016-04-25。

基金项目：国家自然科学基金项目，编号：21576054，21306026。

第一作者简介：陈国荣（1993—），男，本科生，研究方向为纳米材料、环境催化。 E-mai l：cgr2012gdut @126.com。

通信作者简介：余林（1963—），男，教授，博士生导师，研究方向为催化新材料、电催化氧化和超级电容器。 E-mail：gych@gdut.edu.cn。