Spreading CdS Nanocrystals on GdBO3:Ce,Tb Substrates for Enhancing Their Photocatalytic Performance
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CdS nanocrystals (NCs) is a very important visible-light-driven photocatalyst due to their optimal band gap of 2.4 eV, but their photocatalytic performance is still restrained by a few factor such as easy aggregation and weak response to UV light. In this work, we employ spindle-like GdBO3:Ce,Tb particles as seeds to grow some CdS NCs on their surface. In the prepared GdBO3:Ce,Tb/CdS composite photocatalysts, the GdBO3:Ce,Tb particles not only serve as a substrate to improve the stability of CdS NCs but also work as a light-transducer to convert the UV light to visible emissions to activate the CdS NCs. In contrast to pure CdS NCs, the hybrid photocatalyst exhibit an enhanced photocatalytic performance due to the additional utilization of the UV light and the substrate effect. The hybrid photocatalysts have been characterized by XRD, TEM, and PL etc. and their working mechanism has been elucidated.
KeywordsPhotocatalysts Nanocomposites CdS Rare-earth Nanoparticles Lanthanide doping
The authors acknowledge financial support from National Natural Science Foundation of China (No 21273203) and Natural Science Foundation of Zhejiang Province (No R15B010001). Mr. Qincheng also thanks for the financial support from New Talent Project for Undergraduates in Zhejiang Province (No 2016R404044).
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Conflict of interest
The authors declare no competing financial interest.