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Citation: CHEN Quan-You, TAN Xue-Cai, DU Fang-Kai, FENG De-Fen, LUO Yan-Ni, AI Chen-Hao, WU Ye-Yu, YAN Jun. A Photoelecteochemical Sensor Based on CdS Sensitized Fe: TiO₂ Nanosheets for Determination of Cu²⁺[J]. Chinese Journal of Analytical Chemistry, ;2018, 46(2): 232-238. doi: 10.11895/j.issn.0253-3820.171177 shu

A Photoelecteochemical Sensor Based on CdS Sensitized Fe: TiO₂ Nanosheets for Determination of Cu²⁺

School ofChemistry and Chemical and Engineering, Guangxi University for Nationalities, Key Laboratory of Guangxi Colleges and Universities for Food Safety and Pharmaceutical Analytical Chemistry, Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Nanning 530006, China

Received Date: 17 August 2017
Revised Date: 5 December 2017

Fund Project: This work was supported by the National Natural Science Foundation of China (Nos.21365004,21065001) and the Natural Science Foundation of Guangxi Province, China (No.2013GXNSFDA019006).

Iron-doped titanium dioxide nanosheets was prepared by hydrothermal method using tetrabutyl titanate (C₁₆H₃₆O₄Ti) and iron trifluoride (FeF₃) and modified on ITO electrode. ITO/Fe:TiO₂/CdS photoelectrochemical sensor was fabricated by successive ionic layer absorption and reaction (SILAR) method for determination of copper ion. The band gap of electode material was narrowed by iron doped TiO₂ nanosheets, which made its absorption red-shifted and its response range of light was magnified. Based on the sensitization effect of CdS, the absorption and utilization of visible light of sensor was significantly enhanced and the photoelectric signal was amplified via reducing the recombination of electrons and holes.The sensor displayed excellent analytical performance for detection of copper ion with linear range of 0.2-4.0 μmol/L and 4.0-80.0 μmol/L and with the detection limit of 85 nmol/L. The sensor was used to detect copper ion in tap water, drinking water and Yongjiang river water with recoveries ranging from 94% to 111%.
- Titanium dioxide nanosheets,
- Photoelectrochemical sensor,
- Copper ion,
- Photoelectric signal
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通讯作者: 陈斌, bchen63@163.com

A Photoelecteochemical Sensor Based on CdS Sensitized Fe: TiO₂ Nanosheets for Determination of Cu²⁺