TY - JOUR
T1 - Facile oxidative conversion of TiH2 to high-concentration Ti3+-self-doped rutile TiO2 with visible-light photoactivity
AU - Grabstanowicz, Lauren R.
AU - Gao, Shanmin
AU - Li, Tao
AU - Rickard, Robert M.
AU - Rajh, Tijana
AU - Liu, Di Jia
AU - Xu, Tao
PY - 2013/4/1
Y1 - 2013/4/1
N2 - TiO2, in the rutile phase with a high concentration of self-doped Ti3+, has been synthesized via a facile, all inorganic-based, and scalable method of oxidizing TiH2 in H 2O2 followed by calcinations in Ar gas. The material was shown to be photoactive in the visible-region of the electromagnetic spectrum. Powdered X-ray diffraction (PXRD), transmission electron microscopy (TEM), ultraviolet-visible-near-infrared (UV-vis-NIR), diffuse reflectance spectroscopy (DRS), and Brunauer-Emmett-Teller (BET) methods were used to characterize the crystalline, structural, and optical properties and specific surface area of the as-synthesized Ti3+-doped rutile, respectively. The concentration of Ti3+ was quantitatively studied by electron paramagnetic resonance (EPR) to be as high as one Ti3+ per ∼4300 Ti4+. Furthermore, methylene blue (MB) solution and an industry wastewater sample were used to examine the photocatalytic activity of the Ti3+-doped TiO2 which was analyzed by UV-vis absorption, Fourier transform infrared spectroscopy (FT-IR), and electrospray ionization mass spectrometry (ESI-MS). In comparison to pristine anatase TiO2, our Ti3+ self-doped rutile sample exhibited remarkably enhanced visible-light photocatalytic degradation on organic pollutants in water.
AB - TiO2, in the rutile phase with a high concentration of self-doped Ti3+, has been synthesized via a facile, all inorganic-based, and scalable method of oxidizing TiH2 in H 2O2 followed by calcinations in Ar gas. The material was shown to be photoactive in the visible-region of the electromagnetic spectrum. Powdered X-ray diffraction (PXRD), transmission electron microscopy (TEM), ultraviolet-visible-near-infrared (UV-vis-NIR), diffuse reflectance spectroscopy (DRS), and Brunauer-Emmett-Teller (BET) methods were used to characterize the crystalline, structural, and optical properties and specific surface area of the as-synthesized Ti3+-doped rutile, respectively. The concentration of Ti3+ was quantitatively studied by electron paramagnetic resonance (EPR) to be as high as one Ti3+ per ∼4300 Ti4+. Furthermore, methylene blue (MB) solution and an industry wastewater sample were used to examine the photocatalytic activity of the Ti3+-doped TiO2 which was analyzed by UV-vis absorption, Fourier transform infrared spectroscopy (FT-IR), and electrospray ionization mass spectrometry (ESI-MS). In comparison to pristine anatase TiO2, our Ti3+ self-doped rutile sample exhibited remarkably enhanced visible-light photocatalytic degradation on organic pollutants in water.
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U2 - 10.1021/ic3026182
DO - 10.1021/ic3026182
M3 - Article
AN - SCOPUS:84875791207
SN - 0020-1669
VL - 52
SP - 3884
EP - 3890
JO - Inorganic chemistry
JF - Inorganic chemistry
IS - 7
ER -