α-MnO2/β-MnO2 catalysts synthesized by one-pot method and their catalytic performance for the oxidation of toluene

被引：0

作者：

Li Z. ^{[1
]}

Wan J. ^{[2
]}

Liu Y. ^{[2
]}

Tang Y. ^{[2
]}

Liu W. ^{[2
]}

Song Z. ^{[3
]}

Zhang X. ^{[1
]}

机构：

[1] College of Environmental and Safety Engineering, Shenyang University of Chemical Technology, Liaoning, Shenyang

[2] College of Science, Shenyang University of Chemical Technology, Liaoning, Shenyang

[3] College of Municipal and Environmental Engineering, Henan University of Urban Construction, Henan, Pingdingshan

来源：

Huagong Xuebao/CIESC Journal | 2022年 / 73卷 / 08期

关键词：

catalytic combustion; MnO[!sub]2[!/sub] catalyst; volatile organic compounds;

D O I：

10.11949/0438-1157.20220344

中图分类号：

学科分类号：

摘要：

A series of MnO2 catalysts were prepared via a hydrothermal method at different pH, characterized by XRD, SEM, N2-adsorption XPS and H2-TPR, and tested in the total oxidation of toluene. Different pH essentially changes the initial H+ concentration of the reaction solution during the synthesis process of different samples, which dramatically affects the crystallization environment of the obtained samples and gives them different crystal phase. The catalytic activity of the as-prepared MnO2 catalysts was evaluated by the catalytic oxidation of toluene, and the result illustrates that the catalytic performance of the catalysts is linearly dependent on the content of α-MnO2. When pH=11, the obtained MnO2-11 catalyst has the largest surface area and the most defect structure, which makes it have the best catalytic activity (T50= 245°C and T90= 256°C) and excellent cycling stability. © 2022 Materials China.

引用

页码：3615 / 3624

页数：9

共 40 条

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