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Silver Nanoparticles Supported on Diamond Nanoparticles as a Highly Efficient Photocatalyst for the Fenton Reaction under Natural Sunlight Irradiation
Author(s) -
Espinosa Juan C.,
Navalón Sergio,
Álvaro Mercedes,
García Hermenegildo
Publication year - 2015
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201500458
Subject(s) - catalysis , photocatalysis , chemistry , nanoparticle , phenol , photochemistry , sunlight , degradation (telecommunications) , irradiation , graphite , nuclear chemistry , inorganic chemistry , materials science , nanotechnology , organic chemistry , telecommunications , physics , astronomy , computer science , nuclear physics
Diamond nanoparticles (NPs) purified conveniently by Fenton oxidation and modified by a subsequent H 2 annealing reduction (D3) are an adequate support for small Ag NPs that are highly active as a (photo‐)Fenton catalyst for phenol degradation. The efficiency of the reaction is accelerated upon exposure to natural sunlight. Ag/D3 is fairly stable under the reaction conditions and could be reused eight times with a marginal decrease in activity to reach an accumulated turnover number of 472 000. Upon sunlight illumination, Ag/D3 can be active even at quasineutral pH values, although an increase of the phenol degradation rate is observed if the initial pH value decreases to 4. Ag/D3 was more efficient than Ag NPs supported on graphite, active carbon, or TiO 2 and similar to Au/D3. Thus, it seems that Ag/D3 is one of most efficient heterogeneous (photo‐)Fenton catalysts ever reported.