化学改性氧化石墨烯对混合染料体系的吸附作用机制研究

项目名称： 化学改性氧化石墨烯对混合染料体系的吸附作用机制研究

项目编号： No.21207100

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 环境化学

项目作者： 马杰

作者单位： 同济大学

项目金额： 25万元

中文摘要： 本项目针对传统碳吸附材料制备复杂、吸附容量低，选择性差等问题，将最新二维碳纳米材料-氧化石墨烯（GO）应用于水环境保护领域。利用GO高比表面积和高反应活性的独特性质，采用活化和还原相结合的化学改性工艺对GO进行结构设计和表面修饰，考察吸附材料表面物化性质和混合染料的吸附性能之间的内在关系，开发高吸附容量、高吸附强度选择性吸附材料，探索化学改性GO作为吸附材料在水中染料污染物治理的新原理和新方法。提出GO"自身光催化"再生技术，将富集在GO表面的染料催化去除，实现吸附剂循环利用，解决吸附剂使用后造成二次环境污染问题。采用同步辐射技术和高分辨核磁共振波谱仪等表面分析技术对GO吸附染料前后的样品进行分析，直接观测染料分子在GO表面的吸附状态，深入了解吸附材料表面与染料分子相互作用机理，为高吸附容量选择性GO吸附材料的制备和GO作为新型碳纳米材料在环境领域中的应用提供科学依据和实验指导。

中文关键词： 石墨烯；吸附；污染物；吸附机理；再生

英文摘要： Using traditional carbon-based adsorption materials to remove pollutants have suffered from the complexity of fabrication process, low adsorption capacity, and poor selectivity problems. The latest technology of two-dimensional nanomaterial-graphene oxide (GO) has applied in the field of water environment protection as a effective novel absorbent. In this project, we will employ the activation and reduction methods to design and modify the structure of GO based on the GO's unique nature of the high specific surface area and reactivity. Then, we will study the relationship between physical-chemical properties of the surface and its adsorption capacity of mixed dyes, therefore to develop selective absorbents with high adsorption capacity and adsorption strength, we propose to explore the new principles and methods for dye removal in aqueous solution using GO as the absorbents. The technique of "self-photocatalysis generation" is proposed to decompose the dyes accumulated on the GO, in order to solve the recycling and the secondary environmental pollution problems of adsorbents. More importantly, GO samples before and after the absorption process would be analyzed using novel surface analysis techniques like synchrotron radiation techniques and high-resolution nuclear magnetic resonance spectrometer. The behaviors

英文关键词： Graphene；Adsorption；Pollutant；Adsorption Mechanism；Regeneration