还原氧化石墨烯/TiO_(2)纳米线复合膜的制备及对Cu^(2+)吸附性的影响  

Preparation of Reduced Graphene Oxide/TiO_(2) Nanowires Composite Film and Its Adsorption Performance for Cu2+

作　　者：林晓霞[1] 李慧 付德刚[2] LIN Xiaoxia;LI Hui;FU Degang(School of Material Engineering, Jinling Institute of Technology, Nanjing 211169, China;State Key Laboratory of Bioelectronics, Southeast University, Nanjing 210096, China)

机构地区：[1]金陵科技学院材料工程学院,南京211169 [2]东南大学,生物电子学国家重点实验室,南京210096

出　　处：《人工晶体学报》2021年第2期318-324,337,共8页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51172043);江苏省产学研合作项目(BY2020500);金陵科技学院博士启动基金(JIT-B-201307)。

摘　　要：以石墨烯和自制TiO_(2)粉末为原料,通过两步水热法联合真空抽滤法制备还原氧化石墨烯/TiO_(2)纳米线(rGO/TiO_(2) NWs)复合膜。通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射仪(XRD)、拉曼光谱对rGO/TiO_(2) NWs复合膜的形貌、结构进行表征。研究结果表明,还原氧化石墨烯和TiO_(2) NWs成功地复合在一起,复合材料中TiO_(2) NWs分散性较好。Cu^(2+)吸附实验结果表明,复合材料中TiO_(2) NWs所占比例、pH值是影响Cu^(2+)吸附效果的重要因素,研究复合材料对Cu^(2+)的吸附效果应该在pH值为6.0的近中性环境。其中TiO_(2) NWs含量为50%时,复合膜对Cu^(2+)的吸附量最高,达到rGO薄膜的4倍。复合薄膜有较好的吸附稳定性,重复使用5次后,吸附率是原吸附量的91%。The composite film of reduced graphene oxide/TiO_(2) nanowires(rGO/TiO_(2) NWs)was prepared by two-step hydrothermal method united vacuum filtration using graphene and self-prepared TiO_(2) powder as raw materials.The sample was characterized by scanning electron microscope(SEM),transmission electron microscopy(TEM),X-ray diffractometer(XRD)and Raman spectroscopy.The results show that reduced graphene oxide and TiO_(2) NWs are successfully compounded,and the dispersion of TiO_(2) NWs are good.The adsorption experiments of Cu^(2+)show that the proportion of TiO_(2) NWs in the composite,pH values are the important factors affecting the Cu^(2+)adsorption,the adsorption of Cu^(2+)on the composite should be studied near neutral environment with pH=6.0.While containing 50%TiO_(2) NWs,the adsorption capacity of the composite film for Cu^(2+)is 4 times of rGO film.The composite film has good adsorption stability,and the adsorption rate still retains 91%of the original adsorption after 5 times of reuse.

关 键 词：还原氧化石墨烯 TiO_(2)纳米线 两步水热法 真空抽滤 复合薄膜 Cu^(2+) 吸附 

分 类 号：O643[理学—物理化学]