Wang Shuyue, Yin Haoyong, Qu Kaige, Wang Ling, Gong Jianying, Zhao Shumin, Wu Shengji
Wenzhou Institute of Hangzhou Dianzi University, Wenzhou, 325038, China.
Department of Chemistry, Zhejiang Sci-Tech University, Hangzhou, 310018, China.
Anal Sci. 2023 Aug;39(8):1297-1306. doi: 10.1007/s44211-023-00336-2. Epub 2023 Apr 11.
As excess nitrite has a serious threat to the human health and environment, constructing novel electrochemical sensors for sensitive nitrite detection is of great importance. In this report, platinum nanoparticles were deposited on nickel-/N-doped carbon nanotubes, which were obtained through a self-catalytically grown process with Ni-MOF as precursors. The as-prepared Pt/Ni/NCNTs were applied as amperometric sensors and presented superior sensing properties for nitrite detection. Benefiting from the synergy of Pt and Ni/NCNTs, Pt/Ni/NCNTs displayed much wider detection ranges (0.5-40 mM and 40-110 mM) for nitrite sensing. The sensitivity is 276.92 μA mM cm and 224.39 μA mM cm, respectively. The detection limit is 0.17 μM. The Pt/Ni/NCNTs sensors also showed good feasibility for nitrite sensing in real samples (milk and peach juice) analysis. The active Pt/Ni/NCNTs composites and facile fabrication technique may provide useful strategies to develop other sensitive nitrite sensors.
由于过量的亚硝酸盐对人类健康和环境构成严重威胁，构建用于灵敏检测亚硝酸盐的新型电化学传感器具有重要意义。在本报告中，铂纳米颗粒沉积在镍/氮掺杂碳纳米管上，镍/氮掺杂碳纳米管是通过以镍基金属有机框架为前驱体的自催化生长过程获得的。所制备的Pt/Ni/NCNTs用作电流型传感器，对亚硝酸盐检测表现出优异的传感性能。得益于Pt与Ni/NCNTs的协同作用，Pt/Ni/NCNTs在亚硝酸盐传感方面显示出更宽的检测范围（0.5 - 40 mM和40 - 110 mM）。灵敏度分别为276.92 μA mM⁻¹ cm⁻²和224.39 μA mM⁻¹ cm⁻²。检测限为0.17 μM。Pt/Ni/NCNTs传感器在实际样品（牛奶和桃汁）分析中的亚硝酸盐传感方面也显示出良好的可行性。活性Pt/Ni/NCNTs复合材料和简便的制备技术可能为开发其他灵敏的亚硝酸盐传感器提供有用的策略。
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