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High-performance amperometric sensors using catalytic platinum nanoparticles-thionine-multiwalled carbon nanotubes nanocomposite

机译:使用催化铂纳米颗粒-硫氨酸-多壁碳纳米管纳米复合材料的高性能安培传感器

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摘要

Thionine (TH) adsorbed on multiwalled carbon nanotubes (MWCNTs) increases the load and dispersion of platinum nanoparticles (PtNPs) generated by chemical reduction of H_2PtCl_6 with NaBH_4. Under the optimum conditions, the PtNPs-TH-MWCNTs/Au electrode electrocatalyzed the reduction and oxidation of H_2O_2 with high sensitivity, and after glucose oxidase (GOx) adsorption it responded to glucose concentration with a sensitivity of 0.14-A-M~(-1)-cm~(-2). The cyclic voltammetric cathodic peak current for NO_2- reduction on PtNPs-TH-MWCNTs/Au responded linearly to NO_2- concentration from 0.5 to 150-μM, with a sensitivity of 5.52-A-M~(-1)-cm~(-2) and a detection limit of 0.2-μM.
机译:吸附在多壁碳纳米管(MWCNT)上的硫氨酸(TH)增加了用NaBH_4化学还原H_2PtCl_6所产生的铂纳米颗粒(PtNP)的负载和分散。在最佳条件下,PtNPs-TH-MWCNTs / Au电极以高灵敏度电催化H_2O_2的还原和氧化,葡萄糖氧化酶(GOx)吸附后对葡萄糖浓度有响应,灵敏度为0.14-AM〜(-1)。 -cm〜(-2)。 PtNPs-TH-MWCNTs / Au上NO_2-还原的循环伏安阴极峰值电流对NO_2-浓度从0.5到150-μM线性响应,灵敏度为5.52-AM〜(-1)-cm〜(-2)检测限为0.2μM。

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