PMID- 29426545 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20180328 LR - 20180328 IS - 1873-3573 (Electronic) IS - 0039-9140 (Linking) VI - 181 DP - 2018 May 1 TI - An electrochemical sensor based on copper-based metal-organic frameworks-graphene composites for determination of dihydroxybenzene isomers in water. PG - 80-86 LID - S0039-9140(18)30003-1 [pii] LID - 10.1016/j.talanta.2018.01.002 [doi] AB - A highly and simply sensitive electrochemical sensor was presented for the simultaneous determination of hydroquinone (HQ) and catechol (CT) in the water based on copper centered metal-organic framework-graphene composites (Cu-MOF-GN) [Cu-MOF = Cu(3)(BTC)(2) (BTC = 1, 3, 5-benzenetricarboxylicacid)] modified glassy carbon electrode (Cu-MOF-GN/GCE). The modification procedure was carried out through casting metal-organic framework-graphene oxide composites (Cu-MOF-GO) on the bare glassy carbon electrode and followed by the transformation of Cu-MOF-GO to Cu-MOF-GN by an electrochemical reduction. The electrochemical behavior of HQ and CT at Cu-MOF-GN/GCE was investigated by cyclic voltammetry (CV), differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS). Under the optimized conditions, the modified electrode had excellent electrocatalytic activity and high selectivity toward HQ and CT. The electrochemical sensor exhibited a linear response in the same range of 1.0 x 10(-6) to 1.0 x 10(-3)M with the detection limits of 5.9 x 10(-7)M for HQ and 3.3 x 10(-7)M for CT (S/N = 3). Four samples of tap water spiked with different concentrations of HQ and CT were considered. The method has been applied to the analysis of these isomers in spiked tap water with recoveries from 99.0 ~ 102.9% and relative standard deviations (RSDs) for 5 successive measurements less than 5% were also acceptable. This method was successfully applied to detect target analytes in the real samples with satisfying results. The MOFs-based sensors in the field of electrochemical sensing held a great promise for routine sensing applications. CI - Copyright (c) 2018 Elsevier B.V. All rights reserved. FAU - Li, Jun AU - Li J AD - College of Chemistry and Chemical Engineering, Shandong Sino-Japanese Center for Collaborative Research of Carbon Nanomaterials, Collaborative Innovation Center for Marine Biomass Fiber Materials and Textiles, Laboratory of Fiber Materials and Modern Textile, the Growing Base for State Key Laboratory, Qingdao University, Qingdao 266071, PR China. FAU - Xia, Jianfei AU - Xia J AD - College of Chemistry and Chemical Engineering, Shandong Sino-Japanese Center for Collaborative Research of Carbon Nanomaterials, Collaborative Innovation Center for Marine Biomass Fiber Materials and Textiles, Laboratory of Fiber Materials and Modern Textile, the Growing Base for State Key Laboratory, Qingdao University, Qingdao 266071, PR China. Electronic address: xiajianfei@126.com. FAU - Zhang, Feifei AU - Zhang F AD - College of Chemistry and Chemical Engineering, Shandong Sino-Japanese Center for Collaborative Research of Carbon Nanomaterials, Collaborative Innovation Center for Marine Biomass Fiber Materials and Textiles, Laboratory of Fiber Materials and Modern Textile, the Growing Base for State Key Laboratory, Qingdao University, Qingdao 266071, PR China. FAU - Wang, Zonghua AU - Wang Z AD - College of Chemistry and Chemical Engineering, Shandong Sino-Japanese Center for Collaborative Research of Carbon Nanomaterials, Collaborative Innovation Center for Marine Biomass Fiber Materials and Textiles, Laboratory of Fiber Materials and Modern Textile, the Growing Base for State Key Laboratory, Qingdao University, Qingdao 266071, PR China. Electronic address: wangzonghua@qdu.edu.cn. FAU - Liu, Qingyun AU - Liu Q AD - College of Chemistry and Environmental Engineering, Shandong University of Science and Technology, Qingdao, PR China. LA - eng PT - Journal Article DEP - 20180105 PL - Netherlands TA - Talanta JT - Talanta JID - 2984816R OTO - NOTNLM OT - Catechol OT - Graphene OT - HKUST-1 OT - Hydroquinone OT - Metal-organic framework EDAT- 2018/02/11 06:00 MHDA- 2018/02/11 06:01 CRDT- 2018/02/11 06:00 PHST- 2017/10/07 00:00 [received] PHST- 2017/12/24 00:00 [revised] PHST- 2018/01/02 00:00 [accepted] PHST- 2018/02/11 06:00 [entrez] PHST- 2018/02/11 06:00 [pubmed] PHST- 2018/02/11 06:01 [medline] AID - S0039-9140(18)30003-1 [pii] AID - 10.1016/j.talanta.2018.01.002 [doi] PST - ppublish SO - Talanta. 2018 May 1;181:80-86. doi: 10.1016/j.talanta.2018.01.002. Epub 2018 Jan 5.