fulltext.study @t Gmail

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

Paper ID Volume ID Publish Year Pages File Format Full-Text
46334 46437 2013 9 PDF Available
Title
Well-dispersed g-C3N4 nanophases in mesoporous silica channels and their catalytic activity for carbon dioxide activation and conversion
Abstract

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 cycloaddition 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.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Well-dispersed g-C3N4 nanophases were prepared in silica mesochannels through a two-step vapor condensation of dicyandiamide. ► Defect-containing, polymeric g-C3N4 nanophases were active catalysts for CO2 activation. ► The active species were detected by XPS analysis. ► Activated CO2 can be steadily converted to target compounds with high selectivity. ► The catalytic materials have good stability and recyclability.

Keywords
Heterogeneous catalysis; Carbides; Nanomaterials; Fixation of carbon dioxide; Cycloaddition
First Page Preview
Well-dispersed g-C3N4 nanophases in mesoporous silica channels and their catalytic activity for carbon dioxide activation and conversion
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 136–137, 5 June 2013, Pages 269–277
Authors
, , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us