Assembling graphitic-carbon-nitride with cobalt-oxide-phosphate to construct an efficient hybrid photocatalyst for water splitting application

Title
Assembling graphitic-carbon-nitride with cobalt-oxide-phosphate to construct an efficient hybrid photocatalyst for water splitting application
Author
Tran Dinh Phong
Keywords
OXYGEN-EVOLVING CATALYST; VISIBLE-LIGHT; OXIDATION; HYDROGEN; SEMICONDUCTORS; COCATALYSTS; EVOLUTION; ELECTRODE; POLYMER; FILM
Issue Date
2013-03
Publisher
ROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
Citation
CATALYSIS SCIENCE & TECHNOLOGY, 권: 3 호: 7, 페이지: 1694-1698
Abstract
A scalable method to load a cobalt-oxide-phosphate (CoPi) water oxidation electrocatalyst onto the surface of a mesoporous graphiticcarbon- nitride (mpg-CNx) semiconductor is reported. This procedure resulted in significant enhancement of photocatalytic activity of the mpg-CNx in water oxidation. The optimal loading gave an oxygen evolution rate of up to approximately 1 mmol O-2 g(cat)(-1) h(-1) under 100 mW cm(-2) visible light illumination in a pH 7 phosphate buffer containing Ag+ or Na2S2O8 as an electron scavenger which was 400 times faster compared with that of the untreated mpg-CNx catalyst. Under visible light illumination and by employing a hole scavenger e. g. methanol, CoPi was converted into a H-2-CoCat HER electrocatalyst which significantly promoted the H-2 generation photocatalytic activities of mpg-CNx. Without any electron/hole scavengers, the mpg-CNx-CoPi-H-2-CoCat composite was able to catalyse the overall water splitting process.
URI
http://pubs.rsc.org/en/Content/ArticleLanding/2013/CY/c3cy00054k#!divAbstracthttp://hdl.handle.net/20.500.11754/44351
ISSN
2044-4753
DOI
10.1039/c3cy00054k
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > CHEMISTRY(화학과) > Articles
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