Oxidation state and structural studies of vanadium-doped titania particles for the visible light-driven photocatalytic activity
Oxidation state and structural studies of vanadium-doped titania particles for the visible light-driven photocatalytic activity
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DOI：
10.1016/j.apsusc.2018.04.125
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发表时间：
2019-04
影响因子：
6.7
通讯作者：
Jung-Hoon Yu;Sang-Hun Nam;Ji won Lee;Dong In Kim;J. Boo
中科院分区：
文献类型：
--
作者：
Jung-Hoon Yu;Sang-Hun Nam;Ji won Lee;Dong In Kim;J. Boo
V-doped TiO2nanoparticles (NPs) were synthesized by the sol–gel hydrolysis method using titanium butoxide (Ti(OBu)4) and vanadyl acetylacetonate (VO(acac)2) as the precursor and dopant, respectively. The effects of different V:Ti ratios on the crystal structure, bandgap energy, and photocatalytic activity were investigated. The photocatalytic activity of V-doped TiO2NPs was evaluated by UV–vis absorption spectroscopy through the degradation of a methylene blue (MB) solution under visible light irradiation. The Raman spectra and X-ray diffraction patterns show that V was doped effectively, and oxygen vacancies and various defects or Ti3+centers were formed. The results of energy dispersive X-ray analysis and X-ray photoelectron spectroscopy indicated the presence of V in the TiO2. The bandgap energy of 0.45% V-doped TiO2NPs was determined to be 2.34 eV with a distinct red shift from 3.25 eV confirmed by diffuse reflectance spectroscopy. The photocatalytic activity of V-doped TiO2NPs exhibited 2 times higher enhanced visible-light-induced photocatalytic performance compared to the pristine TiO2NPs.
