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Self‐powered Photoelectrochemical Sensor for Gallic Acid Exploiting a CdSe/ZnS Core‐shell Quantum Dot Sensitized TiO2 as Photoanode
Electroanalysis ( IF 2.7 ) Pub Date : 2018-04-06 , DOI: 10.1002/elan.201800133 Greicy Kelly Cerqueira dos Santos 1 , Fernanda Gabrielle Soares da Silva 1 , Sakae Yotsumoto Neto 1 , Wallans Torres Pio dos Santos 2 , Rita de Cássia Silva Luz 1 , Flávio Santos Damos 1
Electroanalysis ( IF 2.7 ) Pub Date : 2018-04-06 , DOI: 10.1002/elan.201800133 Greicy Kelly Cerqueira dos Santos 1 , Fernanda Gabrielle Soares da Silva 1 , Sakae Yotsumoto Neto 1 , Wallans Torres Pio dos Santos 2 , Rita de Cássia Silva Luz 1 , Flávio Santos Damos 1
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Herein is described the development of a self‐powered sensor for gallic acid (GA) determination exploiting CdSe/ZnS quantum dot sensitized TiO2 nanoparticles (CdSe/ZnS/TiO2/FTO) as photoanode and an all copper oxide photocathode (CuO/Cu2O/FTO) to reduce water. A two‐chamber self‐powered photoelectrochemical cell was employed in order to maintain separated the photoelectrodes. The self‐powered photoelectrochemical cell is based on water reduction in the cathodic chamber while gallic acid acts as a hole scavenger in the anodic chamber to generate the necessary cell output to drive GA oxidation in the anodic compartment. Electrochemical impedance measurements were performed to evaluate the electronic characteristics of CdSe/ZnS/TiO2/FTO photoanode and CuO/Cu2O/FTO photocathode in terms of flat band potential, carrier density, and nature of semiconductor. Under optimized conditions, the self‐powered photoelectrochemical cell presented a wide linear response range for GA from 1 μmol L−1 up to 200 μmol L−1.
中文翻译：
没食子酸的自供电光电化学传感器，利用CdSe / ZnS核壳量子点敏化的TiO2作为光阳极。
本文介绍了利用CdSe / ZnS量子点敏化的TiO 2纳米颗粒（CdSe / ZnS / TiO 2 / FTO）作为光阳极和全铜氧化物光电阴极（CuO / Cu ）来开发用于没食子酸（GA）测定的自供电传感器的开发2 O / FTO）以减少水分。为了维持分离的光电极，使用了一个两腔自供电的光电化学电池。自供电的光电化学电池基于阴极腔室中的水分减少，而没食子酸则充当阳极腔室中的空穴清除剂，以产生必需的电池输出，以驱动GA在阳极腔室中氧化。进行电化学阻抗测量以评估CdSe / ZnS / TiO 2的电子特性/ FTO光电阳极和CuO / Cu 2 O / FTO光电阴极的平坦带电势，载流子密度和半导体性质。在最佳条件下，自供电光电化学电池对GA的线性响应范围很宽，从1μmolL -1到200μmolL -1。
更新日期：2018-04-06
中文翻译：
没食子酸的自供电光电化学传感器，利用CdSe / ZnS核壳量子点敏化的TiO2作为光阳极。
本文介绍了利用CdSe / ZnS量子点敏化的TiO 2纳米颗粒（CdSe / ZnS / TiO 2 / FTO）作为光阳极和全铜氧化物光电阴极（CuO / Cu ）来开发用于没食子酸（GA）测定的自供电传感器的开发2 O / FTO）以减少水分。为了维持分离的光电极，使用了一个两腔自供电的光电化学电池。自供电的光电化学电池基于阴极腔室中的水分减少，而没食子酸则充当阳极腔室中的空穴清除剂，以产生必需的电池输出，以驱动GA在阳极腔室中氧化。进行电化学阻抗测量以评估CdSe / ZnS / TiO 2的电子特性/ FTO光电阳极和CuO / Cu 2 O / FTO光电阴极的平坦带电势，载流子密度和半导体性质。在最佳条件下，自供电光电化学电池对GA的线性响应范围很宽，从1μmolL -1到200μmolL -1。
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