A Photoelecteochemical Sensor Based on CdS Sensitized Fe:TiO2Nanosheets for Determination of Cu2+
10.11895/j.issn.0253-3820.171177
- VernacularTitle:基于CdS敏化Fe:TiO2纳米片的光电传感器对Cu2+的检测
- Author:
Quan-You CHEN
1
;
Xue-Cai TAN
;
Fang-Kai DU
;
De-Fen FENG
;
Yan-Ni LUO
;
Chen-Hao AI
;
Ye-Yu WU
;
Jun YAN
Author Information
1. 广西民族大学化学化工学院
- Keywords:
Titanium dioxide nanosheets;
Photoelectrochemical sensor;
Copper ion;
Photoelectric signal
- From:
Chinese Journal of Analytical Chemistry
2018;46(2):232-238
- CountryChina
- Language:Chinese
-
Abstract:
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%.
