Abstract
Formation of solid solutions is a good strategy to acquire materials with special properties and bring forth new type of applications or enhance the performance of currently existing devices. In this study, hollow ZnxCd1−xS nanospheres with different molar ratios were synthesized via a facile hydrothermal process. The products were fully characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, and UV-vis absorption spectroscopy. It was found that the photocatalysis performance of the as-prepared samples could be enhanced by formation of ZnxCd1−xS solid solutions. In addition, their photocatalytic activities are dependent on the Zn/Cd molar ratios and nanostructures of ZnxCd1−xS solid solutions. Hollow Zn0.2Cd0.8S spheres exhibit extremely high photocatalytic activity and good re-usability, and the photocatalytic conversion of RhB reaches as high as 96% after 50 min of irradiation.
Highlights
Even with the both addition of carboxymethyl cellulose (CMC) and ammonia, if shorten the reaction time to one hour, only solid sphere products can be obtained (Figure S2)
A series of ZnxCd1−xS hollow spheres were prepared with the assistance of carboxymethyl cellulose (CMC) and ammonia via a hydrothermal process, using zinc acetate, cadmium nitrate and l-cysteine as reactants
All the diffraction peaks shift to the higher angles with increasing the Zn2+ concentration as shown in Fig. 1, which indicates that the ZnxCd1−xS solid solutions have been successfully prepared
Summary
Even with the both addition of CMC and ammonia, if shorten the reaction time to one hour, only solid sphere products can be obtained (Figure S2). The composition, morphology and structure of the as-prepared ZnxCd1−xS hollow spheres were further elucidated by energy dispersive X-ray spectroscopy (EDS) and transition electron microscopy (TEM).
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