类石墨烯碳纳米片作为电化学测定对苯二酚和邻苯二酚的新型电极材料。

Graphene-like carbon nanosheets as a new electrode material for electrochemical determination of hydroquinone and catechol.

机构信息

Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China.

出版信息

Talanta. 2017 Mar 1;164:300-306. doi: 10.1016/j.talanta.2016.11.052. Epub 2016 Nov 23.

DOI:10.1016/j.talanta.2016.11.052

PMID:28107933

Abstract

We report here graphene-like carbon nanosheets (GCN) as a new electrode material for the electrochemical determination of hydroquinone (HQ) and catechol (CC). The GCN were prepared from maltose using ammonia chloride as a blowing agent and cobalt nitrate as a graphitization catalyst precursor. The as-prepared GCN material shows high graphitization degree, abundant porosity, and large specific surface area. Two well-separated anodic peaks for HQ and CC are obtained at GCN modified glassy carbon electrode (GCE) with a peak-to-peak separation of 118mV. The redox peak currents of HQ and CC at GCN/GCE were much higher than those at bare GCE and reduced graphene oxide modified GCE. For differential pulse voltammetric detection of HQ and CC, the GCN/GCE shows linear response ranges of 1×10 ̶ 3×10M for HQ and 5×10 ̶ 5×10M for CC, with detection limits of 2×10M for HQ, and 5×10 M for CC. Satisfactory recoveries were achieved for the determination of HQ and CC in real water samples.

摘要

我们在此报告了一种类似石墨烯的碳纳米片（GCN），它可用作电化学测定对苯二酚（HQ）和邻苯二酚（CC）的新型电极材料。GCN 是由麦芽糖在氯化铵作为发泡剂和硝酸钴作为石墨化催化剂前体的条件下制备得到的。所制备的 GCN 材料具有高石墨化程度、丰富的多孔性和较大的比表面积。在 GCN 修饰的玻碳电极（GCE）上，HQ 和 CC 得到了两个分离良好的阳极峰，峰峰分离度为 118mV。HQ 和 CC 在 GCN/GCE 上的氧化还原峰电流远高于在裸 GCE 和还原氧化石墨烯修饰 GCE 上的氧化还原峰电流。对于 HQ 和 CC 的差分脉冲伏安法检测，GCN/GCE 对 HQ 的线性响应范围为 1×10 ̶ 3×10M，对 CC 的线性响应范围为 5×10 ̶ 5×10M，HQ 的检测限为 2×10M，CC 的检测限为 5×10 M。在实际水样中测定 HQ 和 CC 时，获得了令人满意的回收率。