N-doped, S-doped TiO2nanocatalysts: synthesis, characterization and photocatalytic activity in the presence of sunlight

RSC Advances ◽  
2015 ◽  
Vol 5 (47) ◽  
pp. 37096-37101 ◽  
Author(s):  
P. V. R. K. Ramacharyulu ◽  
Dipak Bapurao Nimbalkar ◽  
J. Praveen Kumar ◽  
G. K. Prasad ◽  
Shyue-Chu Ke
Keyword(s):  
Photocatalytic Activity ◽  
Catalytic Activity ◽  
Low Temperature ◽  
Photocatalytic Degradation ◽  
Hydrothermal Treatment ◽  
Sol Gel ◽  
Chemical Warfare Agent ◽  
Chemical Warfare ◽  
Toxic Chemical ◽  
Sol Gel Process

N doped and S doped nano TiO2catalysts were synthesized by a sol–gel process followed by hydrothermal treatment at low temperature and tested for catalytic activity by natural sunlight photocatalytic degradation of a toxic chemical warfare agent.

Hybrid cotton–anatase prepared under mild conditions with high photocatalytic activity under sunlight

RSC Advances ◽  
2016 ◽  
Vol 6 (64) ◽  
pp. 58957-58969 ◽  
Author(s):  
Marwa Abid ◽  
Soraa Bouattour ◽  
David S. Conceição ◽  
Ana Maria Ferraria ◽  
Luís Filipe Vieira Ferreira ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Hydrothermal Treatment ◽  
Sol Gel ◽  
High Photocatalytic Activity ◽  
New Approach ◽  
Mild Conditions ◽  
Cotton Fibres ◽  
Sol Gel Process

Cotton fibres were coated with nanolayers of TiO2, anatase, using a new approach based on a non-hydrolytic sol–gel process followed by a mild hydrothermal treatment at a temperature lower than 140 °C.

Study on Photocatalytic Degradation of MG by PW12-TiO2/SiO2

2014 ◽  
Vol 675-677 ◽  
pp. 448-454
Author(s):  
Xi Quan Wang ◽  
Qi Zhe Yang ◽  
Shi Ying Fan ◽  
Yuan Li
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Catalytic Activity ◽  
Photocatalytic Degradation ◽  
Photocatalytic Oxidation ◽  
Phosphotungstic Acid ◽  
Anatase Phase ◽  
Sol Gel ◽  
High Catalytic Activity ◽  
Composite Oxides

To investigate the photocatalytic degradation of MG by PW12-TiO2/SiO2, in this study PW12-TiO2/SiO2 composite oxides were prepared by sol-gel and hydrothermal strategy. The prepared photocatalysits were characterized by XRD, BET,TEM and EDS techniques and the configuration charateristics of PW12-TiO2/SiO2 nanoparticles were systematically investigated. Photocatalytic activity was checked by the photocatalytic oxidation of MG dye in aqueous solution. The results showed that the phosphotungstic acid still has the Keggin structure. The anatase phase of titanium oxid is identified by XRD. The result of the present work implied that compared with pure TiO2, the PW12-TiO2/SiO2 composite oxides have stronger catalytic activity, good particles dispersion and bigger specific surface area. The optimal concentration of MG was 20mg.L-1, the best dosage of PW12-TiO2/SiO2 was 1g.L-1. Moreover, after three times of recycling, the catalyst still has high catalytic activity.

Photocatalytic activity of TiO2prepared at low temperature by a photo-assisted sol-gel method

2001 ◽  
Vol 16 (4) ◽  
pp. 907-909 ◽  
Author(s):  
Zi-Sheng Guan ◽  
Xin-Tong Zhang ◽  
Ying Ma ◽  
Ya-An Cao ◽  
Jian-Nian Yao
Keyword(s):  
Photocatalytic Activity ◽  
Low Temperature ◽  
Ultraviolet Irradiation ◽  
Acidic Medium ◽  
Sol Gel ◽  
High Photocatalytic Activity ◽  
X Ray Diffraction ◽  
X Ray ◽  
Sol Gel Process ◽  
Very High

TiO2nanocrystals were prepared by a photo-assisted sol-gel process in which tetrabutoxide titanate was hydrolyzed in acidic medium under ultraviolet irradiation. X-ray diffraction and Raman spectra showed that the as-prepared TiO2particles without further annealing were well-crystallized anatase. Such TiO2particles were easily immobilized on dacron cloth and showed very high photocatalytic activity. In contrast, TiO2particles were ill crystallized and showed lower activity when no light was introduced under otherwise equal conditions.

Preparation Conditions on Adsorption and Photocatalytic Activity of TiO2 Particles Prepared by Sol-Gel Method

2011 ◽  
Vol 230-232 ◽  
pp. 131-135
Author(s):  
Wen Jie Zhang ◽  
Yang Yu
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Degradation Rate ◽  
Irradiation Time ◽  
Sol Gel ◽  
Time Range ◽  
Optimal Composition ◽  
Preparation Conditions ◽  
Sol Gel Process

The amounts of ethanol, HCl and H2O, and also calcination conditions during sol-gel process of preparing TiO2 photocatalyst were investigated. Methyl orange adsorption on TiO2 prepared using different sol compositions is not more than 4% by varying the amount of ethanol, HCl and H2O. The photocatalytic degradation is related to sol composition, and the optimal composition is composed of 10 ml ethanol, 1.0 ml H2O, and 0.1 ml HCl. Calcination temperature and time are also important in TiO2 preparation. The TiO2 particle prepared at 500 °C for 3 h has the optimal photocatalytic activity. In the irradiation time range up to 100 min, photocatalytic degradation rate constantly increases up to 94.2%.

scholarly journals Preparation, Characterization, and Photocatalytic Activity of TiO2/ZnO Nanocomposites

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Liqin Wang ◽  
Xiujun Fu ◽  
Yang Han ◽  
E. Chang ◽  
Haitao Wu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Physical Adsorption ◽  
Sol Gel ◽  
Composite Catalysts ◽  
Composite Photocatalysts ◽  
Structure Morphology ◽  
Sol Gel Process ◽  
Correlation Constant ◽  
Degradation Reaction

Nanoparticles of the TiO2/ZnO composite photocatalysts were prepared via sol-gel process. The crystalline structure, morphology, thermal stability, and pore structure properties of the composite photocatalysts were characterized by XRD, FE-SEM, TG-DTA, and N2physical adsorption measurements. The photocatalytic activity of the composite catalysts was evaluated by photocatalytic degradation reaction of methyl orange (MO) in aqueous solution. The best preparation parameters for the composite photocatalysts were obtained through systematical experiments. Furthermore, the photocatalytic degradation reaction of aqueous MO solution followed the first-order reaction kinetics; the relative equation can be described asln(C0/C)=0.5689t, and the calculated correlation constant (R2) is 0.9937 for the calibration curve.

Low temperature mullitization of oxime-modified aluminosiloxane by sol-gel process

2021 ◽  
pp. 1-9
Author(s):  
Ajay Saini ◽  
Dalip Singh ◽  
Banwari Lal Choudhary ◽  
Veena Dhayal
Keyword(s):  
Low Temperature ◽  
Sol Gel ◽  
Sol Gel Process

Low temperature synthesis of ultrafine α-Al2O3 powder by a simple aqueous sol–gel process

2006 ◽  
Vol 32 (5) ◽  
pp. 587-591 ◽  
Author(s):  
Jiang Li ◽  
Yubai Pan ◽  
Changshu Xiang ◽  
Qiming Ge ◽  
Jingkun Guo
Keyword(s):  
Low Temperature ◽  
Sol Gel ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
Al2o3 Powder ◽  
Sol Gel Process ◽  
Α Al2o3

The Preparation and Photocatalytic Activity of SWNTs Doped ZnO/TiO2 Compound Films

2010 ◽  
Vol 97-101 ◽  
pp. 1611-1615 ◽  
Author(s):  
Qing Wang ◽  
Xin Li Li ◽  
Wei Nie ◽  
Yong Mei Xia ◽  
Jian Feng Dai
Keyword(s):  
Photocatalytic Activity ◽  
Absorption Spectra ◽  
Sol Gel ◽  
Composite Films ◽  
Wavelength Region ◽  
Tio2 Films ◽  
X Ray Diffraction ◽  
Sol Gel Process ◽  
Doped Zno ◽  
Walled Carbon Nanotubes

The ZnO/TiO2 composite films were deposited over glass using spin coating technique by sol-gel process. Single-walled carbon nanotubes (SWNTs) were used to modify the ZnO/TiO2 films successfully in this paper. The structure and composition of the ZnO/TiO2 composite and SWNTs doped ZnO/TiO2 composite were characterized by X-ray diffraction (XRD). The morphology of samples was characterized by scanning electron microscopy (SEM). The photocatalytic activity was investigated by photocatalytic degradation of aqueous methyl orange under ultraviolet (UV) radiation. The UV-vis absorption spectra of the ZnO/TiO2 films and SWNTs doped ZnO/TiO2 films in the wavelength region 200~800 nm were obtained. The results indicate that the SWNTs addition can decrease the grain size of ZnO/TiO2, which can enhance the photocatalytic activity. UV-vis absorption spectra of SWNTs-ZnO/TiO2 showed obvious blue shifts compared with ZnO/TiO2. The optimal amount of doping SWNTs is 1% according to this research. The enhanced mechanism of the SWNTs for the photocatalytic activity in ZnO/TiO2 films was analyzed in this article.

Immobilization of Nano-TiO2 on Expanded Perlite for Photocatalytic Degradation of Rhodamine B

2011 ◽  
Vol 110-116 ◽  
pp. 3795-3800 ◽  
Author(s):  
Xiao Zhi Wang ◽  
Wei Wei Yong ◽  
Wei Qin Yin ◽  
Ke Feng ◽  
Rong Guo
Keyword(s):  
Catalytic Activity ◽  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Degradation Kinetics ◽  
Irradiation Time ◽  
Sol Gel ◽  
Polluted Water ◽  
Order Kinetic ◽  
Expanded Perlite ◽  
Initial Concentration

Expanded perlite (EP) modified titanium dioxide (TiO2) with different loading times were prepared by Sol-Gel method. Photocatalytic degradation kinetics of Rhodamine B (RhB) in polluted water by the materials (EP-nanoTiO2), as well as the effects of different loading times and the initial concentration of RhB on photocatalysis rate were examined. The catalytic activity of the regenerated photocatalyst was also tested. The results showed that photocatalyst modified three times with TiO2had the highest catalytic activity. Degradation ratio of RhB by EP-nanoTiO2(modified three times) under irradiation for 6 h were 98.0%, 75.6% and 63.2% for 10 mg/L, 20 mg/L and 30 mg/L, respectively.The photocatalyst activity has little change after the five times recycling, and the degradation rate of RhB decreased less than 8%. The reaction of photocatalysis for RhB with irradiation time can be expressed as first-order kinetic mode within the initial concentration range of RhB between 10mg/L and 30 mg/L. EP-nanoTiO2photocatalyst has a higher activity and stability to degrade RhB in aqueous solution.

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