Journal
CHEMPHYSCHEM
Volume 14, Issue 3, Pages 591-596Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.201200862
Keywords
cadmium; dyes; pigments; nanostructures; hydrothermal synthesis; photocatalysis
Funding
- National Basic Research Program of China [2013CB922102, 2011CB935800]
- National Natural Science Foundation of China [21071076, 51172106, 21021062]
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In this study, we report the synthesis of monodispersive solid and hollow CdS spheres with structure-dependent photocatalytic abilities for dye photodegradation. The monodispersive CdS nanospheres were constructed with the assistance of the soulcarboxymthyi chitosan biopolymer under hydrothermal conditions. The solid CdS spheres were corroded by ammonia to form hollow CdS nanospheres through a dissolutionreprecipitation mechanism. Their visible-light photocatalytic activities were investigated, and the results show that both the solid and the hollow CdS spheres have visible-light photocatalytic abilities for the photodegradation of dyes. The photocatalytic properties of the CdS spheres were demonstrated to be structure dependent. Although the nanoparticles comprising the hollow spheres have larger sizes than those comprising the solid spheres, the hollow CdS spheres have better photocatalytic performances than the solid CdS spheres, which can be attributed to the special hollow structure.
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