A novel photo-electrochemical sensor for determination of hydroquinone based on copper hexacyanoferrate and platinum films modified n-silicon electrode

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• 作者：Hongyan WuAuthor Vitae ; Jinchao HuAuthor Vitae ; Heng LiAuthor Vitae ; Huaixiang Li ; ^{lihuaixiang@sdnu.edu.cn} ; ^{lihuaixiang1212@163.com}Author Vitae
• 关键词：CuHCF ; copper hexacyanoferrate ; HQ ; hydroquinone ; n-n+-Si ; phosphorus heavy doped silicon with epitaxial layer ; Pt/n-n+-Si ; platinum layer coated n-n+-Si ; CuHCF/Pt/n-n+-Si ; copper hexacyanoferrate modified Pt/n-n+-Si ; PEC ; photo-electrochemical cell ; XPS
• 刊名：Sensors and Actuators B: Chemical
• 出版年：2013
• 出版时间：June, 2013
• 年：2013
• 卷：182
• 期：Complete
• 页码：802-808
• 全文大小：1710 K

文摘

A novel hydroquinone (HQ) sensor was developed by depositing a film of copper hexacyanoferrate (CuHCF) on silicon electrode coated by a platinum layer. The stable film of CuHCF was electrochemically deposited onto a phosphorus heavy doped silicon (n⁺-Si) with 9 ¦Ìm epitaxial layer (n-n⁺-Si) wafers coated with about 40 nm platinum layer (Pt/n-n⁺-Si). Scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS) and cyclic voltammetry (CV) were used to characterize the morphology, composition and photo-electrochemical behavior of the CuHCF film. A two-electrode cell based on CuHCF/Pt/n-n⁺-Si electrode was used as sensor for HQ determination by photocurrent measurements at a zero bias. The sensor showed good photocurrent responses by adding different concentrations of HQ with a good stability. The linear range for the detection of HQ was 1.0 ¡Á 10^?5 to 2.0 ¡Á 10^?4 M, with a detection limit (S/N = 3) of 2.2 ¡Á 10^?6 M. This provides a facile way of detecting HQ and succeeds in averting from an inconvenient reference electrode.