Fabrication of a novel metal chromite – Carbon nanotube composite for the highly efficient electrocatalytic reduction of hydrogen peroxide
Fabrication of a novel metal chromite – Carbon nanotube composite for the highly efficient electrocatalytic reduction of hydrogen peroxide
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DOI：
10.1016/j.apsusc.2017.01.254
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发表时间：
2017-06
影响因子：
6.7
通讯作者：
Zohreh Shahnavaz;S. B. A. Hamid
中科院分区：
文献类型：
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作者：
Zohreh Shahnavaz;S. B. A. Hamid
采用水热法合成了ZnCr 2 O 4/MWCNTs复合电催化剂。研究了ZnCr 2 O 4/MWCNTs复合修饰电极作为无酶传感器在H2 O2监测中的潜在应用。该传感器的灵敏度为1717.14 μA mM−1cm− 2，检测限为0.11 μM，线性范围为50 μM ~ 34.8 mM，响应时间为2 s。此外，通过测量传感器的电流响应三周来研究修饰电极的性能，以确认所提出的传感器的高度稳定性。沿着这些显著的分析优势，所制备的复合物显示出非常高的特异性，H2 O2与尿酸，抗坏血酸，多巴胺和葡萄糖的干扰完全消除。将该传感器用于透镜清洗液中H2 O2的测定，对真实的样品的测定结果令人满意。
The new electrocatalyst, ZnCr2O4/MWCNTs composite was successfully synthesized by hydrothermal method followed by calcination at 500 °C. A potential application of ZnCr2O4/MWCNTs composite modified electrode as enzyme-free sensor to monitor H2O2has been studied. The sensor exhibited a high sensitivity of 1717.14 μA mM−1cm−2and a low detection limit down to 0.11 μM with a linear wide range from 50 μM to 34.8 mM with a fast response time of 2 s. In addition, modified electrode performance was investigated by measuring current responses of the sensor for three weeks to confirm the great stability of the proposed sensor. Along with these considerable analytical advantages, the as-prepared composite showed very high specificity to H2O2with complete elimination of interference from uric acid, ascorbic acid, dopamine and glucose. The sensor gave satisfactory results in a real sample, when employed for determination of H2O2in lens cleaning solution.