State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou City, 310032, Zhejiang, China.
Sci Rep. 2020 Dec 17;10(1):22126. doi: 10.1038/s41598-020-79286-y.
We report the fabrication of silver nanoparticles evenly imbedded into TiN submicrospheres via one-pot solvothermal reaction and subsequent nitridation for electrochemical detecting of hydrogen peroxide. The precursor of TiO submicrospheres and high dispersion of silver nanoparticles are regulated by the alcoholysis of tetrabutyl titanate and reducibility of enol in vitamin C. The ion nitriding promoted the conductivity and micro-nano porous structure on the surface of TiN submicrospheres, which increase the dispersity of silver nanoparticles and make contributions to avoid aggregations. More importantly, the electrochemical response of Ag-TiN submicrospheres to HO was remarkably enhanced due to the co-effects of Ag and N-doping. It provides a superior sensing performance for electrochemical detection of hydrogen peroxide at - 0.3 V with a high sensitivity of 33.25 μA mmol L cm, wide linear range of 0.05-2100 μM and low detection limit of 7.7 nM. The fabricated sensor also reliably applied in detection of HO in milk samples with good reproducibility, repeatability and storage stability.
我们通过一锅溶剂热反应和随后的氮化反应，报告了将银纳米粒子均匀嵌入 TiN 亚微米球中的制备方法，用于电化学检测过氧化氢。TiO 亚微米球的前体和银纳米粒子的高分散性是通过钛酸四丁酯的醇解和维生素 C 中烯醇的还原来调节的。离子氮化促进了 TiN 亚微米球表面的导电性和微纳米多孔结构，增加了银纳米粒子的分散性，并有助于避免聚集。更重要的是，Ag-TiN 亚微米球对 HO 的电化学响应由于 Ag 和 N 掺杂的协同作用而显著增强。它在-0.3 V 下对过氧化氢的电化学检测提供了出色的传感性能，具有 33.25 μA mmol L cm 的高灵敏度、0.05-2100 μM 的宽线性范围和 7.7 nM 的低检测限。该传感器还可用于检测牛奶样品中的 HO，具有良好的重现性、重复性和存储稳定性。
