Ag@生物类酯与醋酸纤维素纳米结构阵列薄膜对多氯联苯的SERS活性

项目名称： Ag@生物类酯与醋酸纤维素纳米结构阵列薄膜对多氯联苯的SERS活性

项目编号： No.51501183

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 一般工业技术

项目作者： 李中波

作者单位： 安徽农业大学

项目金额： 20万元

中文摘要： 多氯联苯（PCBs）具有高毒性、累积性和半挥发性，能通过各种环境介质长距离迁移，对人类健康和环境造成严重危害。传统的PCBs检测方法前处理过程繁琐、检测周期长，难以满足对PCBs污染的预警及污染现场的实时监测。本项目以PCBs的快速检测为目标，基于表面增强拉曼散射（SERS）技术的快速、痕量检测的原理，综合银纳米结构的高SERS活性以及生物类酯与醋酸纤维素薄膜的吸附性，构筑对PCBs具有高SERS活性的银@生物类酯与醋酸纤维素纳米结构阵列薄膜，研究阵列结构参数与SERS活性之间的关系，阐明该阵列SERS 效应的产生机制。此外，通过选择合适的表面修饰剂对SERS 衬底修饰，以增强衬底捕获痕量PCBs的能力，进一步提高其灵敏性，实现对PCBs的快速痕量检测。该项目的实施，将为基于纳米结构的SERS 技术快速痕量检测PCBs提供科学依据，奠定核心关键检测材料基础；对环境保护具有重要意义。

中文关键词： 贵金属纳米颗粒；银；醋酸纤维素；复合材料；表面增强拉曼散射

英文摘要： Polychlorinated biphenyls (PCBs)，one kind of persistent organic pollutants (POPs) are chemical substances that persist in the environment, bioaccumulate through the food web, and can cause adverse effects to human health and the environment. The common techniques in labs for PCBs detection are complicated and difficult to real-time monitor and the early warning of PCBs pollution. Therefore, it’s urgent to develop a facile technique for trace PCBs detection. Based on the surface-enhacned Ranman scattering (SERS) effect which can be used as an effective approach to the detection of trace molecules, the present project aims at constructing uniform Ag-nanoparticles@triolein-embedded cellulose acetate array membranes as homogeneous SERS substrates that have chemical absorbability and extremly high SERS sensitivity to PCBs, and also revealing the correlation between the parameters of the Ag-nanoparticles@triolein-embedded cellulose acetate composite nanostructure arrays and the SERS activity. To further improve their sensitivity to PCBs and achieve trace or even ultra-trace detection of PCBs, the SERS substrates will be modified with some organic agents to improve their ability to capture trace PCBs molecules. Carrying out this research project will further enrich the technologies for constructing highly homogeneous and sensitive SERS substrates, and provide scientific proof for SERS-based rapid detection of trace PCBs, and also has important significance for environmental protection.

英文关键词： Noble metal nanoparticles;Silver;Cellulose acetate ;Composite materials;SERS