Preparation and Photocatalytic Activity of Ag-TiO2/CNT Photocatalyst

2012 ◽  
Vol 472-475 ◽  
pp. 157-160
Author(s):  
Jun Liu ◽  
Zhi Bing Xu
Keyword(s):  
High Pressure ◽  
Photocatalytic Activity ◽  
Carbon Nanotube ◽  
Methyl Orange ◽  
Mass Fraction ◽  
Sol Gel ◽  
Optimal Conditions ◽  
Mercury Lamp ◽  
Optimal Doping ◽  
Degradation Of Methyl Orange

Ag doped TiO2 was formed on the surface of carbon nanotube(CNT) by the sol-gel method, and characterized by TEM, XRD. The photocatalytic activity of the Ag-TiO2 /CNT was evaluated in degradation of methyl orange with a 300 W high pressure mercury lamp. Effect of Ag doping quantity on the photocatalytic activity of the photocatalys was investigated.The photocatalytic experiment indicated that the photocatalytic activity was firstly improved and then decreased with an increase of amount of Ag doped in TiO2 nanoparticles,the optimal doping quantity was 0.8% silver （ mass fraction of TiO2）, methyl orange could be degraded 99.3 % by Ag-TiO2/CNT under the optimal conditions after 120min.

Preparation of Zno-Cr2O3 Composites by a Sol-Gel Method and their Photocatalytic Activities

2012 ◽  
Vol 151 ◽  
pp. 365-367 ◽  
Author(s):  
Kai Yuan Gu ◽  
Zhan En Peng ◽  
Jin Hua Feng ◽  
Feng Qiang Sun
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Sol Gel ◽  
Mercury Lamp ◽  
Gel Method ◽  
Sol Gel Method ◽  
Photocatalytic Activities ◽  
Degradation Of Methyl Orange

The ZnO-Cr2O3 composites with different complex proportion were prepared by a sol-gel method. The mol ratio of Zn and Cr element could be tuned by controlling the concentration of the precursors. These composites showed photocatalytic activities in degradation of methyl orange under the irradiation of 300W mercury lamp. And the activities regularly varied with the mol ratio of Zn and Cr. When n（Zn）:n（Cr）=10:1, a composite with best photocatalytic activity could be obtained.

Co-Sol-Gel Preparation of SiO2-Doped TiO2 on Adsorption and Photocatalytic Degradation of Methyl Orange

2011 ◽  
Vol 48-49 ◽  
pp. 345-348
Author(s):  
Li Li Yang ◽  
Yan Liang Qu ◽  
Wen Jie Zhang
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Adsorption Equilibrium ◽  
Irradiation Time ◽  
Sol Gel ◽  
Methyl Orange Degradation ◽  
Doped Tio2 ◽  
Degradation Rates ◽  
Gel Preparation ◽  
Degradation Of Methyl Orange

A co-sol-gel method was used to prepare SiO2-doped TiO2. The amount of ethyl silicate added into the precursor, calcination temperature and time, adsorption equilibrium, and photocatalytic activity of the material were investigated as the factor of degradation efficiency. With the optimum composition of the precursor, the prepared gel calcinated at 500 oC for 3 h showed the highest photocatalytic activity. After 30 min stirring to reach adsorption equilibrium, adsorption contributed less than 2% to the total decoloration of methyl orange on the SiO2-doped TiO2 material. Photocatalytic methyl orange degradation continued with increasing irradiation time. Methyl orange degradation rates after 30 min and 100 min were 31.1% and 96.9%, respectively.

Enhanced photocatalytic activity of (Mo, C)-codoped anatase TiO2 nanoparticles for degradation of methyl orange under simulated solar irradiation

2010 ◽  
Vol 25 (12) ◽  
pp. 2392-2400 ◽  
Author(s):  
Pengyu Dong ◽  
Bin Liu ◽  
Yuhua Wang ◽  
Huanhuan Pei ◽  
Shu Yin
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Energy Gap ◽  
Adsorption Property ◽  
Sol Gel ◽  
Anatase Tio2 ◽  
Solar Irradiation ◽  
Sol Gel Process ◽  
Simulated Solar Irradiation ◽  
Degradation Of Methyl Orange

C-doped, Mo-doped, and (Mo, C)-codoped TiO2 photocatalysts were prepared by a sol-gel process. The photocatalytic activity was evaluated by the photocatalytic degradation of methyl orange (MO) under simulated solar irradiation. Results indicated that both monodoped and codoped TiO2 exhibited better visible light absorption behavior and narrower energy gap than pure TiO2, and codoped TiO2 showed a slightly higher adsorption property in the dark because of higher Brunauer–Emmett–Teller-specific surface area. The photocatalytic activity of monodoped TiO2 was also enhanced, and the (0.04% Mo, C)-codoped sample had the best photocatalytic activity for degrading MO among all of the samples. The reason can be ascribed to the synergistic effect due to Mo and C doping. Furthermore, the transfer pathways of photoinduced carriers and photocatalytic reaction mechanism of (Mo, C)-codoped TiO2 was first investigated.

Facile synthesis of AC@TiO2-S with improved visible light photocatalytic activity and recyclability through a controllable sol–gel approach

RSC Advances ◽  
2015 ◽  
Vol 5 (70) ◽  
pp. 56808-56814 ◽  
Author(s):  
Zhiying Duan ◽  
Zhichao Wang ◽  
Chufeng Sun ◽  
Lianbiao Zhao ◽  
Yanbin Wang
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Sol Gel ◽  
Light Irradiation ◽  
Facile Synthesis ◽  
Visible Light Photocatalytic Activity ◽  
Degradation Of Methyl Orange ◽  
Visible Light Photocatalytic

AC@TiO2-S prepared by controlled sol–gel approach exhibits improved photocatalytic activity over AC@TiO2-G prepared by sol–gel approach for the degradation of methyl orange under visible light irradiation and has excellent recyclability.

Preparation of TiO2 nanofilm via sol–gel process and its photocatalytic activity for degradation of methyl orange

2009 ◽  
Vol 35 (8) ◽  
pp. 3275-3280 ◽  
Author(s):  
Lijuan Chen ◽  
Jintao Tian ◽  
Huang Qiu ◽  
Yansheng Yin ◽  
Xin Wang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Sol Gel ◽  
Sol Gel Process ◽  
Degradation Of Methyl Orange

Synthesis, Characterization of Pr-TiO2 Nanoparticles and their Photocatalytic Mechanism

2012 ◽  
Vol 557-559 ◽  
pp. 497-500 ◽  
Author(s):  
Feng Ping Huang ◽  
Ying Ge Fan ◽  
Jing Jing Sun
Keyword(s):  
Phase Transformation ◽  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Lattice Distortion ◽  
Sol Gel ◽  
Electron Hole ◽  
Remarkable Improvement ◽  
Praseodymium Doping ◽  
Degradation Of Methyl Orange

The Pr-TiO2 photocatalyst samples were prepared by sol-gel method for improving the photocatalytic activity of TiO2. The resulting materials were analyzed by XRD, SEM, TEM, and XPS. The photocatalytic activity of the catalysts was evaluated by degradation of methyl orange under UV irradiation. It was found Pr doping retard the growth of crystalline size and the phase transformation from anatase to rutile. Praseodymium doping could bring about remarkable improvement in the photoactivity. This high activity was attributed to produce the lattice distortion and inhibit efficiently of the recombination of the electron-hole by Pr3+.

The Degradation of Methyl Orange with NiO/γ-Al2O3 Photocatalyst by Plasma-Assisted Preparation

2012 ◽  
Vol 503-504 ◽  
pp. 629-632
Author(s):  
Dan Yang Xie ◽  
Qiu Rong Li ◽  
Hai Yan Xiao ◽  
Hong Xiao Lu ◽  
Ran Ran Wang
Keyword(s):  
High Pressure ◽  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Influence Factors ◽  
Impregnation Method ◽  
Mercury Lamp ◽  
Methyl Orange Degradation ◽  
Ft Ir ◽  
Analytical Tools ◽  
Degradation Of Methyl Orange

This paper reports NiO/γ-Al2O3 photocatalysts have well photocatalytic degradation capacity. NiO/γ-Al2O3 catalysts were prepared by Ni(NO3)2•6H2O,γ-Al2O3 with the impregnation method, and treated by the plasma-assisted, which were characterized by XRD, FT-IR,BET and other analytical tools. The influence factors of methyl orange degradation efficiency were analyzed under the 250W high-pressure mercury lamp.

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