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以钛酸四丁酯为钛源,无水乙醇为溶剂,通过碳球模板法制备出直径为200nm、壳厚20～25nm的TiO2空心球(HS).通过X射线衍射(XRD)、透射电子显微镜(TEM)、扫描电子显微镜(SEM)和N2吸附脱附等对产物的形貌、晶相组成、孔结构和紫外-可见光谱性质进行了表征,结果显示所制备的锐钛矿相TiO2空心微球是由初级结构纳米级TiO2晶粒构成的.将这种TiO2空心球应用于染料敏化太阳电池(DSSC)领域可以提高光阳极对光的散射.通过制备P25/HS-TiO2双层膜电极,相比单纯的P25纳米晶电极(Jsc=13.5mAcm?2,Voc=0.653V,FF=0.53,η=4.95%)可以得到更高的光电转化效率(Jsc=15.79mAcm?2,Voc=0.653V,FF=0.55,η=6.66%).
TiO2 hollow spheres (HS) with diameter of 200 nm and shell thickness of 20-25 nm were prepared by tetragne titanate and anhydrous ethanol as solvent, respectively. X-ray diffraction (XRD), transmission electron The morphology, crystal phase composition, pore structure and UV-Vis spectrum of the product were characterized by means of TEM, SEM and N2 adsorption desorption. The results showed that the prepared anatase TiO2 hollow The microspheres are composed of primary structural nano-sized TiO2 grains. The application of such TiO2 hollow spheres in the DSSC field can improve the light scattering of the photoanode. By preparing the P25 / HS-TiO2 bilayer Electrode, higher photoelectric conversion efficiency (Jsc = 15.79mAcm? 2, Voc = 15.79mAcm? 2) can be obtained compared to pure P25 nanocrystalline electrode (Jsc = 13.5mAcm? 2, Voc = 0.653V, FF = 0.53,? = 4.95% 0.653V, FF = 0.55, η = 6.66%).