Solvothermal synthesis of hierarchical TiO 2 nanostructures with tunable morphology and enhanced photocatalytic activity
2015; Elsevier BV; Volume: 360; Linguagem: Inglês
10.1016/j.apsusc.2015.11.021
ISSN1873-5584
AutoresZhenghua Fan, Fanming Meng, Miao Zhang, Zhenyu Wu, Zhaoqi Sun, Aixia Li,
Tópico(s)Catalytic Processes in Materials Science
ResumoThis paper presents controllable growth and photocatalytic activity of TiO2 hierarchical nanostructures by solvothermal method at different temperatures. It is revealed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) that the morphology of TiO2 can be effectively controlled as rose-like, chrysanthemum-like and sea-urchin-like only changing solvothermal temperature. BET surface area analysis confirms the presence of a mesoporous network in all the nanostructures, and shows high surface area at relatively high temperature. The photocatalytic activities of the photocatalysts are evaluated by the photodegradation of RhB under UV light irradiation. The TiO2 samples exhibit high activity on the photodegradation of RhB, which is higher than that of the commercial P25. The enhancement in photocatalytic performance can be attributed to the synergetic effect of the surface area, crystallinity, band gap and crystalline size.
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