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Synthesis and Visible‐Light Photocatalytic Performance of Cadmium Sulfide and Oxide Hexagonal Nanoplates
Author(s) -
Lang Di,
Liu Fan,
Qiu Guohong,
Feng Xionghan,
Xiang Quanjun
Publication year - 2014
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201402220
Subject(s) - photocatalysis , cadmium sulfide , visible spectrum , materials science , hexagonal phase , hydrothermal circulation , oxide , aqueous solution , hydrogen production , hydrothermal synthesis , inorganic chemistry , thermal treatment , chemical engineering , phase (matter) , chemistry , catalysis , organic chemistry , optoelectronics , engineering , metallurgy , composite material
Cadmium sulfide and oxide hexagonal nanoplates were prepared by a facile ion‐exchange strategy and crystal transformation process by using morphology‐analogous cadmium oxyhydroxide as a precursor. The precursors of uniform Cd(OH) 2 hexagonal nanoplates was first synthesized by a simple ethylenediaminetetraacetic acid disodium salt assisted hydrothermal method. Then, through ion‐exchange reactions of the as‐prepared Cd(OH) 2 precursors with S 2− anions, cubic‐phase CdS was formed immediately on the surface of Cd(OH) 2 nanoplates. The above intermediates could be further completely converted into CdS and CdO nanoplates without morphology changes through thermal treatment at 280 °C for 4 h under a sulfur atmosphere and under air, respectively. The photocatalytic activity of all samples was evaluated by the photocatalytic decolorization of an aqueous solution of methylene blue and photocatalytic hydrogen production under visible‐light irradiation. The results show that the CdS hexagonal nanoplates exhibit high visible‐light photocatalytic degradation properties and photocatalytic hydrogen production activity. The enhanced visible‐light photocatalytic activity can be related to several factors, including a suitable band gap, phase structure, and morphology of the hexagonal nanoplates.