Defects of multi-walled carbon nanotubes as active sites for benzene hydroxylation to phenol in the presence of H2O2

被引：70

作者：

Song, Shaoqing ^{[1
]}

Yang, Hongxiao ^{[1
]}

Rao, Richuan ^{[1
]}

Liu, Huade ^{[1
]}

Zhang, Aimin ^{[1
]}

机构：

[1] Nanjing Univ, Sch Chem & Chem Engn, Key Lab Mesoscop Chem MOE, Nanjing 210093, Peoples R China

来源：

CATALYSIS COMMUNICATIONS | 2010年 / 11卷 / 08期

基金：

中国国家自然科学基金;

关键词：

Multi-walled carbon nanotubes; Defects; Hydroxylation of benzene; Phenol; CATALYTIC-ACTIVITY; DIAMETER; OXIDATION; CHEMISTRY;

D O I：

10.1016/j.catcom.2010.02.015

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Multi-walled carbon nanotubes (MWCNTs) with different defect densities have been obtained by heating and ultrasonication in nitric acid solution and used directly as catalyst for the hydroxylation of benzene in the presence of H2O2. The results showed that the catalytic activity increased with increasing defect densities of MWCNTs and had no direct relationship with the MWCNT diameters and oxygen-containing groups. The defects produced by heating and ultrasonication exhibited the same catalytic activities in hydroxylation reaction. The catalysis reaction was proposed to occur via active oxygen attacking benzene process. The active oxygen was generated by H2O2 decomposition on the defect of MWCNTs with dangling incomplete bonding. And cyclic voltammetry tests also showed that the current density of H2O2 decomposition increased along with increasing MWCNT defect densities. Thus, highly defective MWCNTs could accelerate the hydroxylation of benzene. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：783 / 787

页数：5

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