Directly one-step electrochemical synthesis of graphitic carbon nitride/graphene hybrid and its application in ultrasensitive electrochemiluminescence sensing of pentachlorophenol

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• 作者：Binyuan Xia¹ ; ^aAuthor Vitae ; Qiming Yuan¹ ; ^bAuthor Vitae ; Mingfu Chu^aAuthor Vitae ; Shaofei Wang^aAuthor Vitae ; Rui Gao^aAuthor Vitae ; Shanli Yang^a ; ^{yangshanli@caep.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Chengbin Liu^cAuthor Vitae ; Shenglian Luo^cAuthor Vitae
• 关键词：Ultra-trace PCP ; Graphitic carbon nitride ; Graphene ; Electrochemiluminescence sensing
• 刊名：Sensors & Actuators: B. Chemical
• 出版年：2016
• 出版时间：2 June 2016
• 年：2016
• 卷：228
• 期：Complete
• 页码：565-572
• 全文大小：1431 K

文摘

In this paper, g-C₃N₄/GR hybrid has been prepared by a novel one-step electrochemical reduction technology for the first time. GR not only serves as immobilization platform for g-C₃N₄, but also significantly enhances the electrochemiluminescence (ECL) signal of g-C₃N₄ (∼4.7 times); additionally, the ECL signal can be further enhanced in the presence of the self-produced coreactant from oxygen reduction. Moreover, due to the quenching effect of pentachlorophenol (PCP) on the ECL signal of g-C₃N₄/GR, an advanced ECL sensor based on g-C₃N₄/GR has been fabricated for the ultrasensitive and rapid detection of PCP with unprecedented sensitivity reaching 1.0 × 10^−11 mol L^−1 in a wide linear range from 1.0 × 10^−11 to 1.0 × 10^−7 mol L^−1, and the possible ECL detection mechanism has been proposed in detail. The practicability of the sensing platform in real water sample shows ideal recovery rates. Moreover, we also find that the one-step electrodeposition technology might be a good and viable way to make the bulk g-C₃N₄ thinner. Our experiments display the powerful utility of GR to g-C₃N₄ ECL studies and will emerge eximious applications in analytical communities and environmental monitoring.