In-situ preparation of TiO2/SnO2 nanocrystalline sol for photocatalysis
2009; Elsevier BV; Volume: 64; Issue: 3 Linguagem: Inglês
10.1016/j.matlet.2009.11.042
ISSN1873-4979
AutoresQianhong Shen, Hui Yang, Xu Qiang, Zhu Yang, Rong Hao,
Tópico(s)Gas Sensing Nanomaterials and Sensors
ResumoA novel preparation method to synthesize TiO2/SnO2 nanocrystalline sol under mild conditions was presented. Ti(OC4H9)4 used as a precursor was hydrolyzed in the rutile SnO2 nanocrystalline sol, and in-situ formed TiO2/SnO2 nanocrystalline sol. The crystal structure, morphology and photocatalysis performance of samples were investigated. The results show that the additional rutile SnO2 nano grains serve as heterogeneous crystal nucleus and exhibite the inducing effect on TiO2 grains growth, thus leading to the changes in crystalline phase and particle morphology. In addition, the photoluminescence (PL) spectra analysis indicates that TiO2/SnO2 composite structure induces a better charge separation, and thus the photocatalytic activity of TiO2/SnO2 sol is increased significantly compared with TiO2 sol.
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