首先在氟掺杂的氧化锡导电玻璃(FTO)上水热生长一层TiO2纳米棒阵列薄膜,然后通过旋涂法旋涂ZnO籽晶层后水热法生长ZnO纳米棒得到TiO2/ZnO纳米棒阵列薄膜。通过XRD、SEM、PL、UV-Vis和电化学工作站等对单层TiO2纳米棒和TiO2/ZnO纳米棒的...首先在氟掺杂的氧化锡导电玻璃(FTO)上水热生长一层TiO2纳米棒阵列薄膜,然后通过旋涂法旋涂ZnO籽晶层后水热法生长ZnO纳米棒得到TiO2/ZnO纳米棒阵列薄膜。通过XRD、SEM、PL、UV-Vis和电化学工作站等对单层TiO2纳米棒和TiO2/ZnO纳米棒的结构、表面形貌、荧光性能、光吸收强度以及光电化学性质进行表征。结果表明,随着水热生长ZnO时间的增长,ZnO纳米棒密度增加;ZnO纳米棒的生长时间不同使其荧光强度不同,TiO2/Zn O纳米棒的荧光强度与单层TiO2纳米棒相比有着微小的减弱,没有明显的衍射峰;TiO2/ZnO纳米棒复合材料比单层TiO2的光吸收强度高,提高其光学性能,但是吸光区域都在紫外光区域;在标准模拟太阳光照射下,TiO2/Zn O纳米棒的光电流为0. 002 m A,单层TiO2纳米棒的光电流为0. 006 m A,复合薄膜的电流有着明显的变化。展开更多
Porous TiO2/ZnO composite nanofibers have been successfully prepared by electrospinning technique for the first time.It was generated by calcining TiO2/ZnCl2/PVP[PVP:polyvinyl pyrrolidone)]nanofibers,which were elec...Porous TiO2/ZnO composite nanofibers have been successfully prepared by electrospinning technique for the first time.It was generated by calcining TiO2/ZnCl2/PVP[PVP:polyvinyl pyrrolidone)]nanofibers,which were electrospun from a mixture solution of TiO2,ZnCl2 and PVP.Transmission electron microscopy(TEM) and X-ray diffraction(XRD) analyses were used to identify the morphology of the TiO2/ZnO nanofibers and a formation of inorganic TiO2/ZnO fibers.The porous structure of the TiO2/ZnO fibers was characterized by N2 adsoption/desorption isotherm.Surface photovoltage spectroscopy(SPS) and photocatalytic activity measurements revealed advance properties of the porous TiO2/ZnO composite nanofibers and the results were compared with pure TiO2 nanofibers,pure ZnO nanofibers and TiO2/ZnO nanoparticles.展开更多
摘要首先在氟掺杂的氧化锡导电玻璃(FTO)上水热生长一层TiO2纳米棒阵列薄膜,然后通过旋涂法旋涂ZnO籽晶层后水热法生长ZnO纳米棒得到TiO2/ZnO纳米棒阵列薄膜。通过XRD、SEM、PL、UV-Vis和电化学工作站等对单层TiO2纳米棒和TiO2/ZnO纳米棒的结构、表面形貌、荧光性能、光吸收强度以及光电化学性质进行表征。结果表明,随着水热生长ZnO时间的增长,ZnO纳米棒密度增加;ZnO纳米棒的生长时间不同使其荧光强度不同,TiO2/Zn O纳米棒的荧光强度与单层TiO2纳米棒相比有着微小的减弱,没有明显的衍射峰;TiO2/ZnO纳米棒复合材料比单层TiO2的光吸收强度高,提高其光学性能,但是吸光区域都在紫外光区域;在标准模拟太阳光照射下,TiO2/Zn O纳米棒的光电流为0. 002 m A,单层TiO2纳米棒的光电流为0. 006 m A,复合薄膜的电流有着明显的变化。
基金supported in part by the National Natural Science Foundation of China(Nos.50473008 and 50673034)by Natural Science Foundation of the Jiangsu Higher Education Institutions of China(No.09KJD 150001)by DuPont Company through a Young Faculty Grant Award to Prof.C.Wang,and by Headwater Nanokinetix,Inc
摘要Porous TiO2/ZnO composite nanofibers have been successfully prepared by electrospinning technique for the first time.It was generated by calcining TiO2/ZnCl2/PVP[PVP:polyvinyl pyrrolidone)]nanofibers,which were electrospun from a mixture solution of TiO2,ZnCl2 and PVP.Transmission electron microscopy(TEM) and X-ray diffraction(XRD) analyses were used to identify the morphology of the TiO2/ZnO nanofibers and a formation of inorganic TiO2/ZnO fibers.The porous structure of the TiO2/ZnO fibers was characterized by N2 adsoption/desorption isotherm.Surface photovoltage spectroscopy(SPS) and photocatalytic activity measurements revealed advance properties of the porous TiO2/ZnO composite nanofibers and the results were compared with pure TiO2 nanofibers,pure ZnO nanofibers and TiO2/ZnO nanoparticles.