碳包覆ZnO-TiO_2纳米纤维的制备及其太阳光催化性能

Fabrication of carbon coated ZnO-TiO_2 nanofiber and its photocatalytic performance

采用溶胶-凝胶法和静电纺丝法制备ZnO-TiO_2纳米纤维和碳包覆ZnO-TiO_2纳米纤维,以扫描电镜、热重-差示热量、红外光谱、X射线衍射和比表面积分析等方法进行表征。以10mg/L亚甲基蓝溶液为底物,研究了ZnO掺杂量对亚甲基蓝光催化降解性能的影响。结果表明:ZnO的质量分数为3%的碳包覆ZnO-TiO_2纳米纤维光催化性能最高,太阳光照射6h时亚甲基蓝的降解率达到94.4%。对其光催化机理进行了简要分析。

ZnO-TiO2 and ZnO-TiO2 coated carbon nanofibers were prepared by sol-gel processing followed by electrospinning technique.The materials were characterized by scanning electron microscopy,differential scanning calorimetry thermogravimetric analysis,Fourier transform infrared,X-ray diffraction and Brunauer Emmett Teller.The effects of ZnO doping amount on the process of photocatalytic degradation of methylene blue of 10mg/L as the substrate were investigated.The results showed that ZnO-TiO2 coated carbon nanofiber dopped 3% ZnO had better degradation rate for methylene blue solution,reached 94.4% under sunshine for 6h,and their photocatalytic mechanism was briefly analyzed.