石墨烯
材料科学
电催化剂
纳米技术
检出限
拉曼光谱
过氧化氢
氧化物
电化学
化学工程
催化作用
电极
物理化学
化学
有机化学
色谱法
冶金
光学
物理
工程类
作者
Yuanyuan Li,Huan Ke,Dongmei Deng,Li Tang,Jinhua Wang,Liqiang Luo
标识
DOI:10.1021/acsami.9b19126
摘要
Mixed transition-metal oxides have witnessed increasing attention in catalysts and electrocatalysts. Herein, reduced graphene oxide-wrapped ZnMn2O4 microspheres (ZnMn2O4@rGO) were facilely synthesized through the solvothermal technique. The microstructure and morphology of ZnMn2O4@rGO microspheres were analyzed under Raman, X-ray photoelectron, X-ray diffraction, and energy-dispersive spectroscopies and scanning electron microscopy. The synthesized ZnMn2O4@rGO was employed as an excellent electrocatalyst for the reduction of hydrogen peroxide (H2O2). The ZnMn2O4@rGO-modified glassy carbon electrode (ZnMn2O4@rGO/GCE) exhibited a linear detection to H2O2 in a wide concentration range of 0.03-6000 μM with a detection limit of 0.012 μM. The biosensor was evaluated to determine H2O2 secreted by human breast cancer cells (MCF-7), indicating its promising applications in physiology and diagnosis.
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