文献类型：期刊文献

英文题名：Thiol-functionalized reduced graphene oxide as self-assembled ion-to-electron transducer for durable solid-contact ion-selective electrodes

作者：Liu, Yueling[1,2];Liu, Yunzhong[2];Meng, Zhen[2];Qin, Yu[2];Jiang, Dechen[2];Xi, Kai[2];Wang, Ping[1]

机构：[1]East China Univ Sci & Technol, Sch Biotechnol, Biomed Nanotechnol Ctr, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China;[2]Nanjing Univ, Sch Chem & Chem Engn, State Key Lab Analyt Chem Life Sci, Nanjing 210093, Jiangsu, Peoples R China

年份：2020

卷号：208

外文期刊名：TALANTA

收录：;EI(收录号：20193907472524);WOS:【SCI-EXPANDED(收录号:WOS:000503314200025)】；

基金：This work was supported by the National Natural Science Foundation of China (21804043), the Shanghai Sailing Program (18YF1405800) and the Fundamental Research Funds for the Central Universities (222201814034).

语种：英文

外文关键词：Thiol-functionalized reduced graphene oxide; Self-assembly; Reduced graphene oxide; Transducing layer; Solid-contact ion-selective electrodes

摘要：Thiol-functionalized reduced graphene oxide (TRGO) as a novel ion-to-electron transducing layer is firstly employed to develop durable solid-contact ion-selective electrodes (SC-ISEs) in this work. The performance of the sensors is evaluated by determining K+ and NO3- as an example of cation and anion, The covalent linkage of TRGO at golden electrode surface generates a stable transducing layer. No water films are observed in the proposed TRGO-based potassium (K+-TRGO-ISEs) and nitrate (NO3--TRGO-ISEs) selective SC-ISEs. The resultant electrodes exhibit Nemstian responses (60.0 +/- 0.4 mV/decade for K+-TRGO-ISEs and -60.0 +/- 0.5 mV/decade for NO3--TRGO-ISEs), low detection limits (2.5 x 10(-6)M for K+-TRGO-ISEs and 4.0 x 10(-6)M for NO3--TRGO-ISEs) and good selectivity behavior. More importantly, the TRGO-based SC-ISEs display a much longer lifetime of 2 weeks than that of reduced graphene oxide-based SC-ISEs in continuous flowing solutions using a longer peristaltic pump. These improvements push TRGO a general and reliable transducer for the development of durable SC-ISEs.