Well-dispersed g-C3N4 nanophases in mesoporous silica channels and their catalytic activity for carbon dioxide activation and conversion

被引：185

作者：

Huang, Zhijun ^{[1
,2
]}

Li, Fengbo ^{[1
]}

Chen, Bingfeng ^{[1
,2
]}

Lu, Tao ^{[1
,2
]}

Yuan, Yin ^{[1
,2
]}

Yuan, Guoqing ^{[1
]}

机构：

[1] Chinese Acad Sci, Beijing Natl Lab Mol Sci, Lab New Mat Inst Chem, Beijing, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2013年 / 136卷

关键词：

Heterogeneous catalysis; Carbides; Nanomaterials; Fixation of carbon dioxide; Cycloaddition; CHEMICAL-SYNTHESIS; CO2; HYDROGENATION; NITRIDE; NANOPARTICLES; MORPHOLOGY; REDUCTION; COMPLEXES; OXIDATION; FIXATION; LIGHT;

D O I：

10.1016/j.apcatb.2013.01.057

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Well-dispersed g-C3N4 nanophases in SBA-15 mesochannels were prepared by a two-step vapor condensation of dicyandiamide. Defect-containing g-C3N4 nanophases were active catalysts for CO2 activation. Activated CO2 species were steadily converted to target compounds with a high selectivity. The presence of doped metal ions markedly promoted the catalytic activity and selectivity. Zn2+-doped g-C3N4/SBA-15 showed a high activity in transferring CO2 to epoxides. Fe3+-doped g-C3N4/SBA-15 was an efficient catalyst for the direct oxidative cycloadditon of CO2 to olefins. Styrene was converted into 4-phenyl-1, 3-dioxolan-2-one. The process conversion was 34.1% and the selectivity to the oxidative cycloaddidon product reached 93%. The recyclability of SBA-15 supported g-C3N4 nanophases was investigated through a five-run test. Their catalytic activity and microstructures were kept constant during the five-run recycling test. No marked metal leaching was detected during each test. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：269 / 277

页数：9

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