Reduced graphite oxide (rGO) was incorporated into a metal organic framework (MOF) MIL-101(Cr) for the modification of carbon paste electrode. Taking advantages of the large surface area of MOF and the electrical conductivity of rGO, the resulted electrodes exhibited high sensitivity and reliability in the simultaneous electrochemical identification and quantification of catechol (CC) and hydroquinone (HQ). Specifically, in the mixture solution of catechol and hydroquinone (constant concentration of an analyte), the linear response ranges for catechol and hydroquinone were 10-1400 μM and 4-1000 μM, and detection limits were 4 μM and 0.66 μM (S/N = 3) for individual catechol and hydroquinone, respectively. Therefore, the relatively easy fabrication of modified CPE and its fascinating reliability towards HQ and CC detection may simulate more research interest in the applications of MIL-101(Cr)-rGO composites for electrochemical sensors.

将还原的氧化石墨（rGO）掺入金属有机骨架（MOF）MIL-101（Cr）中，以修饰碳糊电极。利用MOF的大表面积和rGO的电导率，所得电极在同时电化学鉴定和定量邻苯二酚（CC）和对苯二酚（HQ）方面显示出高灵敏度和可靠性。具体而言，在邻苯二酚和对苯二酚的混合溶液（分析物的浓度恒定）中，邻苯二酚和对苯二酚的线性响应范围为10-1400μM和4-1000μM，检出限为4μM和0.66μM（S / N = 3）分别用于各个儿茶酚和对苯二酚。所以，