期刊
APPLIED CATALYSIS A-GENERAL
卷 439, 期 -, 页码 149-155出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcata.2012.06.052
关键词
Nitrogen-doped carbon; Transesterification; Dimethyl oxalate; Phenol
资金
- Development Project of Science and Technology of Jilin Province [201105009]
- Specialized Research Fund for the Doctoral Program of Higher Education [20090061120024]
- National Natural Science Foundation of China [21003059]
A series of nitrogen-doped nanoporous carbon (NNC) materials were prepared by directly carbonizing sol-gel composites containing aluminum phosphate, citric acid and hexamethylene tetramine (HMT). The structure and surface properties of these NNC materials were characterized by means of elemental analysis, N-2 adsorption, X-ray powder diffraction (XRD), scanning electron microscope (SEM), high-resolution transmission electron microscopy (TEM), Fourier transform infrared spectra (FT-IR), and X-ray photoelectron spectra (XPS). Besides possessing various oxygen-containing groups, these NNC materials also contain different types of nitrogen-containing groups, including pyridinic-N, pyrrolic-N and quaternary-N groups. The resulting NNC materials are highly active and selective heterogeneous catalysts for the transesterification of dimethyl oxalate (DMO) with phenol to produce methyl phenyl oxalate (MPO) and diphenyl oxalate (DPO), and can be easily recycled by simple filtration. The presence of suitable surface basic sites should be mainly responsible for the excellent catalytic performance of NNC materials in the transesterification reaction. (C) 2012 Elsevier B.V. All rights reserved.
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