埃洛石环境矿物材料的制备及应用研究进展  

Research Progress on Preparation and Application of Halloysite Clay as Environmental Mineral Materials

作　　者：陈翔宇 刘明贤 CHEN Xiangyu;LIU Mingxian(Department of Materials Science and Engineering,College of Chemistry and Materials Science,Jinan University,Guangzhou 511443,China;Artificial Organs and Materials Engineering Research Center,Ministry of Education,Guangzhou 511443,China)

机构地区：[1]暨南大学化学与材料学院,广州511443 [2]人工器官及材料教育部工程研究中心,广州511443

出　　处：《硅酸盐学报》2024年第10期3230-3242,共13页Journal of The Chinese Ceramic Society

基　　金：国家自然基金面上项目(52073121)。

摘　　要：天然黏土矿物储量丰富、廉价易得,独特的晶体结构和表面性质赋予其物理吸附和化学反应性能,是环境友好材料研究的热点。埃洛石属于高岭土族黏土矿物,具有中空管状结构、高比表面积、丰富孔结构、较高的机械性能、无毒害等特点,在水处理、土壤污染治理和大气污染控制等领域展现出巨大的潜力。然而天然埃洛石杂质含量多、功能性有限,经提纯加工、表面改性和功能化修饰后可提升其在环境处理方面的性能。本文介绍了埃洛石纳米管的基本物化性质以及有机改性、纳米改性、聚合物改性、复合改性等策略,系统阐述了其作为环境矿物材料的应用进展。Clay minerals as environmentally friendly materials are abundant,cheap,and easy to obtain.Their unique crystal structure and surface properties endow them superior physical adsorption and chemical reaction properties The environmental pollution treatment mainly depends on the structure and properties of the used materials.Halloysite belongs to one of Kaolin clay minerals.It has some characteristics of a hollow tubular structure,high specific surface area,rich pore structure,high mechanical properties,and non-toxicity.The crystal structure and adsorption characteristics of halloysite are used to treat environmental pollutants,such as dyes,heavy metal ions,organic pollutants,etc..However,natural halloysite contains a lot of impurities and shows limited functionality.The performance of HNTs in environmental application can be improved after purification,surface modification,and functionalization.In recent years,researchers conducted some related research on structural modification and functionalization of halloysite,including heat treatment,chemical modification,and composite modification.High-temperature and acid-base treatments affect the specific surface area,porosity,and adsorption capacity of halloysite,enhancing the adsorption capacity for pollutants.The surface of halloysite is rich in hydroxyl groups(i.e.,Si-OH and Al-OH),which can be used as sites for surface modification or functionalization,such as changing the surface wettability or introducing functional groups,metals nanoparticles,and metal oxides,etc..Compounding halloysite with nanomaterials or polymers can form functional nanocomposites,which expands their applications in soil remediation,air purification,and improvement of wastewater quality.Organic substances can be introduced into the structure of halloysite through various methods such as ion exchange,surface modification,covalent bonding,and intercalation modification,thereby giving them enhanced dispersibility,stability,adsorption capacity,and chemical activity.The application of these modific

关 键 词：环境保护 埃洛石黏土 表面改性 废水处理 

分 类 号：X505[环境科学与工程—环境工程] P579[天文地球—矿物学]