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Nitridation of BaO supported on mesoporous materials: Basicity characterization and catalytic properties

Paper ID Volume ID Publish Year Pages File Format Full-Text
41641 45895 2011 9 PDF Available
Title
Nitridation of BaO supported on mesoporous materials: Basicity characterization and catalytic properties
Abstract

Nitridation has drawn much attention as a novel method to prepare solid base materials. In the present work, nitridation was employed to improve the basic property of BaO supported on mesoporous materials. Ba2SiO4 and Ba4Si6O16 basic species were formed after BaO loading on MCM-41 and SBA-15, respectively while only Ba2SiO4 species were observed both on MCM-41 and SBA-15 after nitridation. Basic species, bridging –NH– groups, were introduced into the framework of BaO-MCM-41/SBA-15 by nitridation with the mesoporous structure preserved. The surface basic property of obtained samples was analyzed by IR spectra using CDCl3 and CO2 as probe molecules and XPS. The enhancement in the surface basicity was observed after nitridation. Compared with BaO-MCM-41/SBA-15, the N-incorporated materials with stronger basicity exhibited higher activities in Knoevenagel condensation and the conversion of 2-propanol.

Graphical abstractNitridation was used to improve the surface basicity of BaO supported on MCM-41 and SBA-15 mesoporous materials. Obviously, the as-prepared mesoporous materials with stronger basicity exhibited better base catalytic results in the conversion of 2-propanol..Figure optionsDownload full-size imageDownload high-quality image (133 K)Download as PowerPoint slideResearch highlights▶ The surface basicity of BaO-MCM-41 and BaO-SBA-15 is improved by nitridation. ▶ The Ba2SiO4 and -NH- base species are formed on the surface after nitridation. ▶ BaO-MCM-41N and BaO-SBA-15N present enhanced basic catalytic properties.

Keywords
BaO; Mesoporous materials; Nitridation; Basicity; Base-catalyzed reactions
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Nitridation of BaO supported on mesoporous materials: Basicity characterization and catalytic properties
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 391, Issues 1–2, 4 January 2011, Pages 225–233
Authors
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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