基于石墨烯协同增强近红外吸收比色传感材料的构筑及应用

项目名称： 基于石墨烯协同增强近红外吸收比色传感材料的构筑及应用

项目编号： No.21277103

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 环境科学、安全科学

项目作者： 严正权

作者单位： 皖西学院

项目金额： 80万元

中文摘要： 针对当前日趋严重的环境重金属污染，研究开发快捷检测与分离重金属的新方法，对保护环境、维护人类健康和促进社会可持续发展都具有重要的理论和实践意义。本项目在理论计算的基础上，通过共价键、H键、π-π堆叠自组装等方法将菁、偶氮和冠醚等近红外吸收染料可控修饰到纳米石墨烯基底上，构建一类背景吸收小、环境友好、富集力强的近红外吸收纳米比色传感材料；研究生色团的结构与排列方式、基底的纳米尺寸与比表面积等结构因素对传感性能的影响规律，揭示大π-共轭基底对生色团传感效应的协同增强机制，为高效传感材料的构建提供理论依据；分析传感材料与不同重金属离子的选择性识别机理及对吸收光谱的影响，优化检测条件，实现对重金属离子"裸眼"检测；探讨纳米材料对重金属离子的吸附与解吸附机理，实现富集分离重金属离子和循环利用传感材料的目的；消除因检测对环境造成二次污染，开发一类无污染的比色传感材料制备及应用的新技术。

中文关键词： 比色检测；环境污染；重金属离子；石墨烯；光电材料

英文摘要： Nowadays, the situation of environmental contamination by heavy metals is getting more and more serious. To develop a novel method for rapidly detecting and separating heavy metal ions will possess important theory and practice significance, which is necessary to protect the environment, maitain human health and promote the social sustainable development. To investigate and validate the rationality of structural design of the target colorimetric sensing composites, a theoretical calculation is conducted using the Gaussian 04 software suite with a B3LYP/6-31G level of theory, which is used to understand the geometrical characters of the candidates. On the basis of calculation results, some near infrared absorbing organic dyes such as squaraine, azo and crown ether are controllably modified to the graphene substrates via covalent bonding, hydrogen bond or π-π stacking self-assembly. The resulting near infrared absorbing colorimetric sensing composites are proposed to possess little background absorption, friendly to environment and strong enrichment ability. The effects of the structure and arrangement of chromophores, and the size and specific surface area of nano substrates on the sensing property of the target composites will be studied in details. The synergetic enhancement mechanism of π-conjugated substrates

英文关键词： Colorimetric detection；Environmental pollution；Heavy metal ions；Graphene；Optic-electronic materials