Jump to main content
US EPA
United States Environmental Protection Agency
Search
Search
Main menu
Environmental Topics
Laws & Regulations
About EPA
Health & Environmental Research Online (HERO)
Contact Us
Print
Feedback
Export to File
Search:
This record has one attached file:
Add More Files
Attach File(s):
Display Name for File*:
Save
Citation
Tags
HERO ID
7959114
Reference Type
Journal Article
Title
Graphitic carbon nitride modified by thermal, chemical and mechanical processes as metal-free photocatalyst for the selective synthesis of benzaldehyde from benzyl alcohol
Author(s)
Lima, MJ; Silva, AMT; Silva, CG; Faria, JL
Year
2017
Is Peer Reviewed?
Yes
Journal
Journal of Catalysis
ISSN:
0021-9517
EISSN:
1090-2694
Publisher
Academic Press Inc.
Volume
353
Page Numbers
44-53
Language
English
DOI
10.1016/j.jcat.2017.06.030
Web of Science Id
WOS:000410468300006
Abstract
The selective photocatalytic conversion of benzyl alcohol to benzaldehyde was studied in aqueous medium, as alternative to common organic solvents, in combination with environmentally friendly conditions: metal-free catalysts based on graphitic carbon nitride (g-C3N4), natural pH, ambient temperature and pressure, and light emitting diodes (LEDs) as high efficient lighting source. g-C3N4 was synthesized by thermal condensation of dicyandiamide and the photocatalytic performance evaluated in terms of different post-treatment routes: thermal, mechanical and chemical. Several temperatures (400, 450 and 500 °C), times of mechanical treatment (1.5, 3.0 and 8.0 h) and protic acids (H2SO4, HCl and HNO3) were tested. The post-treatments significantly enhance photocatalytic conversion and yield, with minimal compromise on selectivity. The photocatalyst obtained upon thermal pos-treatment of g-C3N4 at 500 °C, which had the better performance (66% conversion, 59% yield, and 90% selectivity at four hours of irradiation), was found to have the highest BET surface area (87 m2 gâ1). © 2017 Elsevier Inc.
Keywords
Photocatalysis; Selective oxidation; Benzyl alcohol; Benzaldehyde; Carbon nitride
Home
Learn about HERO
Using HERO
Search HERO
Projects in HERO
Risk Assessment
Transparency & Integrity