【作者】 张育新； 郝晓东； 董萌； 李新禄； 黄佳木；

【Author】 Yuxin ZHANG,Xiaodong HAO,Meng DONG,Xinlu LI,Jiamu HUANG College of Materials Science and Engineering,Chongqing University,Chongqing,China,400030

【机构】 重庆大学材料科学与工程学院；

【摘要】 以水热法制备的碳微球和纳米TiO2纳米颗粒为原料,通过自组装的方法在室温下将TiO2纳米颗粒包裹在胶体碳微球的表面,形成以碳微球为核、TiO2纳米颗粒为壳的复合材料。采用场发射扫描电子显微镜、投射电子显微镜、X射线衍射仪和氮气吸附仪对其微观结构与比表面积进行了表征和测试。结果表明,TiO2纳米颗粒均匀的分布在碳微球的表面,实验成功得到TiO2@碳微球核壳复合材料,其比表面积为19.72m2/g,是碳微球载体的比表面积的4倍多。此外,实验采用热重分析仪对TiO2@碳微球核壳复合材料的热稳定性进行了研究。总之,该材料在废水降解用光催化剂领域将会有较大发展潜力。更多还原

【Abstract】 TiO2@Carbon spheres core-shell nanocomposites were synthesized via a self-assembly method with coating TiO2 nanoparticles onto colloidal carbon spheres under ambient condition. The microstructure and compositions of as-prepared samples were characterized by field emission scanning electron microscopy(FESEM) ,transmission electron microscopy(TEM) ,X-ray diffraction(XRD) ,N2 adsorption-desorption isotherms. The results showed that TiO2@Carbon spheres core-shell structure with even distribution of TiO2 nanopaticles on the carbon spheres were obtained as expected. The surface area of TiO2@Carbon spheres nanocomposites was 19.72 m2/g,which was four times higher than that of pure carbon spheres. In addition,the thermal stability of TiO2@Carbon spheres was investigated by thermogravimetric method(TGA) . Therefore,this promising core-shell nanocomposites could be one of ideal candidates for photocatalysis in wasterwater treatment.更多还原