1. Platelike WO3 sensitized with CdS quantum dots heterostructures for photoelectrochemical dynamic sensing of H2O2 based on enzymatic etching.
- Author
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Wang, Yanhu, Gao, Chaomin, Ge, Shenguang, Yu, Jinghua, and Yan, Mei
- Subjects
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TUNGSTEN oxides , *CADMIUM selenide , *QUANTUM dots , *HETEROSTRUCTURES , *PHOTOELECTROCHEMISTRY , *ENZYMATIC analysis , *DOPING agents (Chemistry) - Abstract
A platelike tungsten trioxide (WO 3 ) sensitized with CdS quantum dots (QDs) heterojunction is developed for solar-driven, real-time, and selective photoelectrochemical (PEC) sensing of H 2 O 2 in the living cells. The structure is synthesized by hydrothermally growing platelike WO 3 on fluorine doped tin oxide (FTO) and subsequently sensitized with CdS QDs. The as-prepared WO 3 -CdS QDs heterojunction achieve significant photocurrent enhancement, which is remarkably beneficial for light absorption and charge carrier separation. Based on the enzymatic etching of CdS QDs enables the activation of quenching the charge transfer efficiency, thus leading to sensitive PEC recording of H 2 O 2 level in buffer and cellular environments. The results indicated that the proposed method will pave the way for the development of excellent PEC sensing platform with the quantum dot sensitization. This study could also provide a new train of thought on designing of self-operating photoanode in PEC sensing, promoting the application of semiconductor nanomaterials in photoelectrochemistry. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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