Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, International Joint Research Center for Photoresponsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu, 214122, China.
Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, International Joint Research Center for Photoresponsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu, 214122, China.
Anal Chim Acta. 2021 Mar 15;1150:338216. doi: 10.1016/j.aca.2021.338216. Epub 2021 Jan 15.
An electrochemical sensor was proposed for the detection of hydrogen sulfide (HS) at room temperature, by using electroactive CuO nanocubes (NCs) as an electrochemical beacon. Electroactive CuO NCs were synthesized on the surface of reduced graphene oxide (rGO)/FeO nanosheets (NSs) due to the good electronic conductivity and well-responded magnetic responses. The fabricated rGO/FeO/CuO NSs not only showed electrochemical oxidization peak at -0.1 V from CuO NCs, and could be served as sensitive electrochemical beacon for the simple modification on magnetic electrodes in the applications. The unique redox reaction between CuO NCs and HS enabled the transformation of CuO NCs to CuS NCs, resulting in decreased electroxidation responses at -0.1 V. The constructed electrochemical platform had a limit of detection (LOD) of 230 pM and a detection range of 500 pM-100 μM. The simple and cheap electrochemical sensor developed in this paper showed potential application for HS detection.
提出了一种电化学传感器，用于室温下检测硫化氢（HS），方法是将电活性 CuO 纳米立方（NCs）用作电化学信标。由于具有良好的导电性和响应良好的磁响应，电活性 CuO NCs 合成在还原氧化石墨烯（rGO）/FeO 纳米片（NSs）的表面上。所制备的 rGO/FeO/CuO NSs 不仅在-0.1 V 处显示出来自 CuO NCs 的电化学氧化峰，而且由于在应用中在磁性电极上进行简单的修饰，因此可以用作灵敏的电化学信标。CuO NCs 和 HS 之间的独特氧化还原反应使 CuO NCs 转化为 CuS NCs，导致在-0.1 V 处的电氧化响应降低。所构建的电化学平台的检测限（LOD）为 230 pM，检测范围为 500 pM-100 μM。本文开发的简单廉价的电化学传感器在 HS 检测方面显示出了潜在的应用前景。
