碳纳米管/FeS类Fenton催化剂的制备及催化性能  

Synthesis of Carbon Nanotubes /FeS Fenton-like Catalyst and Its Catalytic Properties

作　　者：杨明轩[1] 马杰[1] 孙怡然[1] 熊新竹 李晨璐[1] 李强[1] 陈君红[1] 

机构地区：[1]同济大学污染控制与资源化研究国家重点实验室,上海200092

出　　处：《高等学校化学学报》2014年第3期570-575,共6页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21207100;21177095)资助~~

摘　　要：以浮动催化热分解法制备碳纳米管（ CNTs），采用氧化-还原-硫化的方法制备了CNTs/FeS催化剂，采用X射线衍射（ XRD）、透射电子显微镜（ TEM）和热重（ TG）分析等技术对催化剂进行了结构表征。将CNTs/FeS作为类Fenton催化剂用于水中环丙沙星的去除，研究了降解过程中H2 O2浓度、CNTs/FeS催化剂的投加量、环丙沙星浓度及pH等因素对催化降解性能的影响。结果表明， CNTs/FeS类Fenton催化反应在H2 O2浓度为20 mmol/L和CNTs/FeS催化剂的投加量为10 mg的条件下具有最优的降解效果，其催化反应过程符合一级动力学方程，且具有更加宽泛的pH适应范围（ pH=3-8），同时， CNTs/FeS类Fenton催化剂在使用寿命方面也具有一定的优势。Chemical vapor deposition（ CVD） was used to fabricate as-prepared multi-walled carbon nanotubes （ CNTs） . CNTs/FeS Fenton-like catalyst was synthesized by oxidation-reduction-vulcanization method. Fur-thermore, The catalyst was characterized by TEM, XRD, TG and other material analysis techniques. And then, the catalyst was used for the removal of ciprofloxacin from aqueous solution. The catalytic activity and catalytic mechanism were studied with concentration of H2 O2 , dosage of catalyst, concentration of ciprofloxa-cin and pH. The results show that there are an optimal H2 O2 concentration（20 mmol/L） and dosage of cata-lyst（10 mg） in CNTs/FeS Fenton-like catalytic reaction. The first order kinetics equation is more appropriate to describe the process of catalytic reaction. And the catalytic reaction has better suitability than previsous study in wide range of pH values（pH=3-8）. Meanwhile, CNTs/FeS Fenton-like catalyst has good regenera-ted properties.

关 键 词：碳纳米管 类芬顿 催化 羟基自由基 环丙沙星 

分 类 号：O643[理学—物理化学]