ZnO/CdS Hierarchical Nanospheres for Photoelectrochemical Sensing of Cu2+

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• 作者：Qingming Shen ; Xiaomei Zhao ; Shiwei Zhou ; Wenhua Hou ; Jun-Jie Zhu
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：September 15, 2011
• 年：2011
• 卷：115
• 期：36
• 页码：17958-17964
• 全文大小：997K
• 年卷期：v.115,no.36(September 15, 2011)
• ISSN：1932-7455

文摘

ZnO/CdS hierarchical nanospheres were prepared for photoelectrochemical selective sensing of Cu²⁺. Hierarchical ZnO nanospheres were first synthesized by the hydrolysis of zinc salt under ultrasound irradiation, and then CdS nanocrystals were selectively grown on the hierarchical ZnO nanospheres. The light scattering of ZnO nanospheres and the heterointerfaces between CdS and ZnO provided significant advantages for enhanced light absorption and charge separation, thus resulting in an improvement in the photocurrent intensity. A photoelectrochemical sensor was developed based on the interaction between Cu²⁺ and CdS. The results showed that this sensor has a good selectivity and high sensitivity for Cu²⁺ detection.