Photocatalytic oxidation of small molecule hydrocarbons over Pt/TiO2 nanocatalysts

RSC Advances ◽  
2016 ◽  
Vol 6 (4) ◽  
pp. 2760-2767 ◽  
Author(s):  
Yunpeng Li ◽  
Yuanzhu Cai ◽  
Xuxing Chen ◽  
Xiaoyang Pan ◽  
Mingxue Yang ◽  
...  
Keyword(s):  
Visible Light ◽  
Small Molecule ◽  
Photocatalytic Oxidation ◽  
Light Activity

Pt loading on P25 resulted in unexpected visible light activity for the oxidation of small molecule hydrocarbons.

scholarly journals Facile Synthesis and Characterization of N-Doped TiO2Photocatalyst and Its Visible-Light Activity for Photo-Oxidation of Ethylene

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Yu-Hao Lin ◽  
Chih-Huang Weng ◽  
Arun Lal Srivastav ◽  
Yao-Tung Lin ◽  
Jing-Hua Tzeng
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Oxidation ◽  
Precursor Solution ◽  
Ammonium Hydroxide ◽  
Titanium Isopropoxide ◽  
Light Region ◽  
Light Activity ◽  
Different Temperatures ◽  
N Doping

A facile wet chemical method was adopted for preparing highly photoactive nitrogen doped TiO2(N-TiO2) powders with visible responsive capability, which could be achieved by the hydrolysis of titanium isopropoxide (TTIP) in the ammonium hydroxide precursor solution in various concentrations and then calcined at different temperatures. The N-TiO2powders were characterized, and the photocatalytic activity was evaluated for the photocatalytic oxidation of ethylene gas under visible light irradiation to optimize the synthesizing conditions of N-TiO2catalyst. The N-TiO2photocatalytic powders were calcined in a range of temperatures from 300 to 600°C and obviously found to have greater photocatalytic activities than commercial TiO2P25. The strong absorption in the visible light region could be ascribed to good crystallization and adapted sinter temperature of as prepared sample. XPS test demonstrated that the N was doped into TiO2lattice and made an interstitial formation (Ti-O-N), and N doping also retarded the phase transformation from anatase to rutile as well. The N-TiO2catalyst prepared with 150 mL ammonium hydroxide added and calcined at 500°C showed the best photocatalytic activity. The experimental results also proved the enhanced photoactivity of N-TiO2material depends on the synthesizing conditions.

Visible-Light Activity Evaluation of p-n Junction Photocatalyst NiO/TiO2 Prepared by Sol-Gel Method

2010 ◽  
Vol 152-153 ◽  
pp. 441-449 ◽  
Author(s):  
Wei Liu ◽  
Shi Fu Chen
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Oxidation ◽  
Raw Materials ◽  
Sol Gel ◽  
Visible Region ◽  
Tetrabutyl Titanate ◽  
Gel Method ◽  
Sol Gel Method ◽  
Light Activity

P-N junction photocatalyst NiO/TiO2 photoexcited by visible light was prepared by sol-gel method using Ni(NO3)2•6H2O and tetrabutyl titanate [Ti(OC4H9)4] as the raw materials. The p-n junction photocatalyst NiO/TiO2 was characterized by UV-Vis diffuse reflection spectrum, fluorescence spectra (FL), X-ray powder diffraction (XRD) and scanning electron microscopy (SEM). UV-Vis spectrum showed that the absorption wavelength range of NiO/TiO2 is extended to the visible region, making it an effective photocatalyst photoexcited by visible light. This was demonstrated by photocatalytic reduction of Cr2O72- and photocatalytic oxidation of methyl orange (MO) under visible-light (λ>400 nm) irradiation. Doped-NiO effectively suppressed the phase transformation of anatase to rutile and the growth of titania crystallites. The optimum percentage of doped NiO is 0.5% (mole ratio of Ni/Ti). Effects of heat treatment on the photocatalytic activity of p-n junction photocatalyst NiO/TiO2 were investigated. The mechanisms of influence on the photocatalytic activity were also discussed by the p-n junction principle.

A facile approach to synthesize oxygen doped g-C3N4 with enhanced visible light activity under anoxic conditions via oxygen-plasma treatment

2018 ◽  
Vol 42 (7) ◽  
pp. 4998-5004 ◽  
Author(s):  
Xiaoyu Qu ◽  
Shaozheng Hu ◽  
Jin Bai ◽  
Ping Li ◽  
Guang Lu ◽  
...  
Keyword(s):  
Visible Light ◽  
Plasma Treatment ◽  
Organic Pollutants ◽  
Photocatalytic Oxidation ◽  
Oxygen Plasma ◽  
Oxygen Plasma Treatment ◽  
Anoxic Conditions ◽  
Light Activity ◽  
Oxidation Technology

Photocatalytic oxidation technology for the anoxic removal of organic pollutants that exist under some oxygen-free conditions is attractive but challenging.

Photocatalytic oxidation of gas-phase Hg0 by carbon spheres supported visible-light-driven CuO–TiO2

2017 ◽  
Vol 46 ◽  
pp. 416-425 ◽  
Author(s):  
Jiang Wu ◽  
Chaoen Li ◽  
Xiantuo Chen ◽  
Jing Zhang ◽  
Lili Zhao ◽  
...  
Keyword(s):  
Visible Light ◽  
Gas Phase ◽  
Photocatalytic Oxidation ◽  
Carbon Spheres ◽  
Visible Light Driven
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