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.

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

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.

Visible-Light Driven LaNiO3 Nanosized Photocatalysts Prepared by a Sol-Gel Process

2011 ◽  
Vol 279 ◽  
pp. 83-87 ◽  
Author(s):  
Pei Song Tang ◽  
He Sun ◽  
Feng Cao ◽  
Jin Tian Yang ◽  
Sheng Liang Ni ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
Light Absorption ◽  
Diffuse Reflectance Spectroscopy ◽  
Sol Gel ◽  
High Photocatalytic Activity ◽  
Visible Light Absorption ◽  
Average Grain Size ◽  
Sol Gel Process

The LaNiO3 nanoparticles were prepared by a sol-gel process. The LaNiO3 nanoparticles were characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and UV-Vis diffuse reflectance spectroscopy (DRS). XRD and SEM demonstrate the successful synthesis of single phase perovskite LaNiO3 and an average grain size of 80 nm in diameter. It was found that the as-prepared LaNiO3 shows strong visible-light absorption with absorption onset of 545 nm, indicating a narrow optical band gap of 2.28 eV. Consequently, LaNiO3 nanoparticles show high visible-light photocatalytic activity for decomposition of methyl orange in comparison with the commercial Degussa P25. The photocatalytic experiment shows the high photocatalytic activity for the decomposition of methyl orange under visible-light irradiation, which is attributed to the strong visible-light absorption.

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.

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.

Adsorption Property and Photocatalytic Activity of Sol-Gel Prepared Porous TiO2 Using PEG1000 as Template

2011 ◽  
Vol 48-49 ◽  
pp. 153-156 ◽  
Author(s):  
Chun Ling Liu ◽  
Ru Yuan Li ◽  
Wen Jie Zhang
Keyword(s):  
Methyl Orange ◽  
Calcination Temperature ◽  
Adsorption Property ◽  
Sol Gel ◽  
Time Range ◽  
Porous Tio2 ◽  
Calcination Temperatures ◽  
Sol Gel Process ◽  
Degradation Activity ◽  
Content Range

PEG1000 was used as a template to prepare porous TiO2 photocatalyst through sol-gel process. The amount of PEG1000 and calcination temperature and time were studied with respect to porous TiO2 activity. At the optimum adding amount of PEG1000, 30.0% of the initial methyl orange was degraded. Methyl orange adsorption on the porous TiO2 maintained less than 2% during the whole template content range. During the calcination temperature range from 400 oC to 600 oC and time range from 2 h to 5 h, the optimum degradation activity appeared to the sample calcinated at 500 oC for 4 h. Adsorption of the materials had no variation at different calcination temperatures and times, and was quite weak compared with degradation efficiencies. 96.2% of the initial methyl orange was degraded after 100 min of irradiation.

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.

Sign in / Sign up

Export Citation Format

Share Document