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个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职：化学学院副院长
其他任职：辽宁省教学名师，宝钢优秀教师特等奖提名奖，中国分析测试学会青年学术委员会委员
性别：女
毕业院校：南京大学
学位：博士
所在单位：化学学院
学科：分析化学. 生物化学与分子生物学
办公地点：化工综合楼C305
电子邮箱：wushuo@dlut.edu.cn
Application of graphene for preconcentration and highly sensitive stripping voltammetric analysis of organophosphate pesticide
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论文类型：期刊论文
发表时间：2011-08-12
发表刊物：ANALYTICA CHIMICA ACTA
收录刊物：SCIE、EI、PubMed
卷号：699
期号：2
页面范围：170-176
ISSN号：0003-2670
关键字：Graphene; beta-Cyclodextrin; Solid phase extraction; Differential pulse voltammetry; Methyl parathion
摘要：Electrochemical reduced beta-cyclodextrin dispersed graphene (beta-CD-graphene) was developed as a sorbent for the preconcentration and electrochemical sensing of methyl parathion (MP), a representative nitroaromatic organophosphate pesticide with good redox activity. Benefited from the ultra-large surface area, large delocalized pi-electron system and the superconductivity of beta-CD-graphene, large amount of MP could be extracted on beta-CD-graphene modified electrode via strong pi-pi interaction and exhibited fast accumulation and electron transfer rate. Combined with differential pulse voltammetric analysis, the sensor shows ultra-high sensitivity, good selectivity and fast response. The limit of detection of 0.05 ppb is more than 10 times lower than those obtained from other sorbent based sensors. The method may open up a new possibility for the widespread use of electrochemical sensors for monitoring of ultra-trace OPs. (C) 2011 Elsevier B.V. All rights reserved.