摘要
纳米材料构建的化学修饰电极用于多巴胺电化学检测已经被广泛研究。当前电极研究策略主要为采用复合材料并构建三维结构以增大吸附表面积。本综述总结了目前常用的纳米碳修饰材料与纳米金属修饰材料,比较分析了其表面结构形貌对多巴胺吸附的影响及吸附机制,总结了目前常用的构建三维修饰电极的方法。分析结果表明,相对于一维形貌,三维形貌结构的修饰电极往往具有更好的检测能力,三维结构不仅能显著增大表面积,提供更多的吸附位点,还可能产生“薄膜效应”,该效应在一定程度上能提高响应灵敏度,但超过一定限度会减缓响应时间,第一性原理分析表明,多巴胺在纳米修饰电极材料表面的吸附机制是化学吸附。最后指出了在改进修饰电极结构设计合理性、增强抗干扰性和提高选择性,以及新的检测控制机制分析方面需要进一步研究。
Modified electrode materials have been widely studied for the electrochemical detection of dopamine.At present,the electrode research strategy is mainly to use composite materials to construct a three-dimensional structure to increase the adsorption surface area.This review summarized the currently commonly used electrode modification materials of nano carbon and nano metal and some methods of constructing three-dimension electrode,compared and analyzed the influence of the surface structure of the modified materials on the adsorption of dopamine,and pointed out the adsorption mechanism of dopamine on the surface of the modified materials.Compared with one dimensional topographic structure,the modified electrodes with a three-dimensional topographic structure often had better detection capabilities.The three-dimensional structure can not only significantly increase the surface area and provide more adsorption sites,but may also produce a“thin film effect”.This effect would improve the response sensitivity in a degree and also slow down the response time if it exceeded a certain limit.Secondly,the adsorption state of dopamine on the surface of different modified materials was analyzed based on first principles.Finally,it was pointed out that further research was needed to improve the design rationality of the modified electrode structure,enhance the anti-interference and selectivity,and analyze the new detection and control mechanism.
作者
陈少华
陈文良
丁益
赵东林
谢发之
任启芳
CHEN Shaohua;CHEN Wenliang;DING Yi;ZHAO Donglin;XIE Fazhi;REN Qifang(Key Laboratory of Functional Molecule Design and Interface Process,Anhui Jianzhu University,Hefei 230601,Anhui,China;Anhui Key Laboratory of Advanced Building Materials,Anhui Jianzhu University,Hefei 230601,Anhui,China)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2021年第11期6135-6144,共10页
Chemical Industry and Engineering Progress
基金
安徽省教育厅自然科学研究重点项目(KJ2020A0475)
安徽省教育厅自然科学研究重大项目(KJ2018ZD049)。
关键词
修饰电极材料
多巴胺
表面形貌
吸附机制
第一性原理
modified electrode materials
dopamine
surface topography
adsorption mechanism
first principles