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Main Title: Facile synthesis of new, highly efficient SnO2/carbon nitride composite photocatalysts for the hydrogen evolution reaction
Author(s): Fettkenhauer, Christian
Clavel, Guylhaine
Kailasam, Kamalakannan
Antonietti, Markus
Dontsova, Dariya
Type: Article
Language Code: en
Abstract: Novel SnO2/carbon nitride photocatalysts having surface areas up to 220 m(2) g(-1) were prepared for the first time by condensation of dicyandiamide in alkali metal chloride/SnCl2-containing salt melts at 550 degrees C, without the use of hard templates. XRD and HR-TEM investigations showed that the obtained materials are composed of 5-10 nm SnO2 nanoparticles deposited onto nanosheets set up from 1D-melon ribbons. The morphology and crystalline structure of products appear to be greatly dependent on the synthesis temperature. SnO2/carbon nitride composites are found to be highly efficient in the photocatalytic reactions, as exemplified by Rhodamine B degradation and water reduction using Pt as a cocatalyst. Under the optimized synthesis conditions, these composite photocatalysts achieve hydrogen evolution rates more than 2 times higher than the mesoporous carbon nitride (mp-CN) under visible light irradiation. In principle, this new method based on utilization of MCl/SnCl2 salt melts as a reaction medium allows carrying out various polymerization reactions in the presence of the mild Lewis acid in the solution phase in the wide temperature range of 180-550 degrees C. Moreover, SnCl2 eutectics are even suitable for post-synthesis modification of the bulk carbon nitride to tune its morphology and greatly increase the surface area and photocatalytic activity.
Issue Date: 2015
Date Available: 25-Oct-2017
DDC Class: 540 Chemie und zugeordnete Wissenschaften
Journal Title: Green chemistry
Publisher: Royal Society of Chemistry
Publisher Place: Cambridge
Volume: 17
Issue: 6
Publisher DOI: 10.1039/c5gc00021a
Page Start: 3350
Page End: 3361
EISSN: 1463-9270
ISSN: 1463-9262
Appears in Collections:FG Metallorganische Chemie und Anorganische Materialien » Publications

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