Yang Kaixiang, Yan Zhengguang, Ma Lin, Du Yiping, Peng Bo, Feng Jicun
Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124, China.
Beijing Key Laboratory of Microstructure and Properties of Solids, Beijing University of Technology, Beijing 100124, China.
Nanomaterials (Basel). 2019 Apr 3;9(4):523. doi: 10.3390/nano9040523.
Cuprous oxide/silver (Cu₂O/Ag) nanocomposites were prepared via a facile one-step method and used to construct an electrochemical sensor for hydrogen peroxide (H₂O₂) detection. In this method, AgNO₃ and Cu(NO₃)₂ were reduced to Cu₂O/Ag nanocomposites by glucose in the presence of hexadecyl trimethyl ammonium bromide (CTAB) at a low temperature. The optimum condition was the molar ratio of silver nitrate and copper nitrate of 1:10, the temperature of 50 °C. Under this condition, Cu₂O/Ag nanocomposites were obtained with uniformly distributed and tightly combined Cu₂O and Ag nanoparticles. The size of Cu₂O particles was less than 100 nm and that of Ag particles was less than 20 nm. Electrochemical experiments indicate that the Cu₂O/Ag nanocomposites-based sensor possesses an excellent performance toward H₂O₂, showing a linear range of 0.2 to 4000 μM, a high sensitivity of 87.0 μA mM cm, and a low detection limit of 0.2 μM. The anti-interference capability experiments indicate this sensor has good selectivity toward H₂O₂. Additionally, the H₂O₂ recovery tests of the sensor in diluted milk solution signify its potential application in routine H₂O₂ analysis.
通过一种简便的一步法制备了氧化亚铜/银（Cu₂O/Ag）纳米复合材料，并将其用于构建用于检测过氧化氢（H₂O₂）的电化学传感器。在该方法中，在十六烷基三甲基溴化铵（CTAB）存在下，葡萄糖在低温下将AgNO₃和Cu(NO₃)₂还原为Cu₂O/Ag纳米复合材料。最佳条件是硝酸银与硝酸铜的摩尔比为1:10，温度为50℃。在此条件下，获得了氧化亚铜和银纳米颗粒均匀分布且紧密结合的Cu₂O/Ag纳米复合材料。氧化亚铜颗粒的尺寸小于100nm，银颗粒的尺寸小于20nm。电化学实验表明，基于Cu₂O/Ag纳米复合材料的传感器对H₂O₂具有优异的性能，线性范围为0.2至4000μM，高灵敏度为87.0μA mM⁻¹ cm⁻²，低检测限为0.2μM。抗干扰能力实验表明该传感器对H₂O₂具有良好的选择性。此外，该传感器在稀释牛奶溶液中的H₂O₂回收率测试表明其在常规H₂O₂分析中的潜在应用。
