石墨烯修饰玻碳电极同时测定邻苯二酚和对苯二酚  

Simultaneous Determination of Hydroquinone and Catechol with Graphene Modified Electrode

作　　者：石丽[1] 王雪[1] 吕莎莎[1] 翁前锋[1] 

机构地区：[1]辽宁师范大学化学化工学院,辽宁大连116029

出　　处：《广州化工》2013年第10期97-99,106,共4页GuangZhou Chemical Industry

摘　　要：将自制的氧化石墨烯以滴涂法修饰在玻碳电极表面,通过电化学还原方法制备得到石墨烯修饰电极。考察了电化学还原条件、修饰量以及底液等对修饰电极的影响。修饰电极对对苯二酚和邻苯二酚的电化学氧化还原表现出很高的电催化能力和分离能力。在0.1 mol/L磷酸盐缓冲溶液(pH7.0)作为支持电解质,利用循环伏安法和微分脉冲伏安法,石墨烯修饰电极可同时检测邻苯二酚和对苯二酚,二者的微分脉冲伏安响应与浓度在8.0×10-6～1.2×10-4mol/L和3.0×10-6～1.0×10-4mol/L范围呈良好的线性关系,检出限分别为1.2×10-6mol/L及3.7×10-7mol/L(3倍噪音法)。A modified glass carbon electrode （GCE） with graphene was fabricated through an electrochemical reduction procedure. The effects of various experimental conditions such as reduction potential, circles and scan rate were studied. The modified electrode showed an excellent electrocatalytic ability towards the redox of hydroquinone and catechol. In 0. 1 mol/L PBS （ pH 7.0）, hydroquinone and catechol could be simultaneously determined on the modified electrode by CV and differential pulse votammetry （DPV） techniques. The linear ranges were 8.0× 10^-6 - 1.2× 10^-4 mol/L for CC and 3.0 × 10^-6 - 1.0 × 10^-4 mol/L for HQ, and detection limit were 1.2 × 10^-6 mol/L and 3. 7 × 10^-7 mol/L（S/N =3）.

关 键 词：石墨烯修饰电极 对苯二酚 邻苯二酚 电催化 

分 类 号：O657.1[理学—分析化学]