Photodegradation of Oily Waste Water Using Nano-TiO2

2011 ◽  
Vol 332-334 ◽  
pp. 2153-2156
Author(s):  
Zong Wei Zhang ◽  
Chuang Zhang
Keyword(s):  
Waste Water ◽  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Sol Gel ◽  
Oily Wastewater ◽  
Tio2 Powder ◽  
Nano Tio2 ◽  
Photo Degradation ◽  
Photo Oxidation ◽  
Oily Waste

Photocatalytic degradation of oily wastewater using Nano-TiO2 was studied.First Nano-TiO2 powder with photocatalytic activity were prepared by sol-gel progress.Second the photo-degradation of oily wastewater on titanium dioxide was investigated.The reaction also features the photocatalytic activity of Nano-TiO2. Finally, the mechanisms of photo-oxidation were discussed.

Photocatalytic Oxidation Thiophene Using Nano-TiO2

2012 ◽  
Vol 217-219 ◽  
pp. 729-732
Author(s):  
Zong Wei Zhang ◽  
Ming Xiong Liu ◽  
Jia Gang Zhai
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Photocatalytic Oxidation ◽  
Sol Gel ◽  
Tio2 Powder ◽  
Nano Tio2 ◽  
Photo Degradation ◽  
Ultraviolet Lamp

Photocatalytic oxidation of thiophene using Nano-TiO2 at ultraviolet lamp irradiation has been studied. The result showed thiophene was photooxidized successfully. First Nano-TiO2 powder with photocatalytic activity were prepared by sol-gel progress.Second the photo-degradation of thiophene on titanium dioxide was investigated.The reaction also features the photocatalytic activity of Nano-TiO2.

Photodegradation of Oily Waste Water Using Lanthanon-Doped TiO2

2012 ◽  
Vol 550-553 ◽  
pp. 2345-2348
Author(s):  
Zong Wei Zhang
Keyword(s):  
Waste Water ◽  
Photocatalytic Activity ◽  
Sol Gel ◽  
Light Response ◽  
Heat Stability ◽  
Photo Degradation ◽  
Visible Light Response ◽  
Response Range ◽  
Oily Waste ◽  
Positive Effect

Nano-TiO2 with photocatalytic activity were prepared by sol-gel progress. Nd3+ and Tb3+ were adoped to enhance the photocatalytic activity. TG, DTG ,UV etc were used to character Nano-TiO2.From TG Nd restrains the growth of grain and the conversion of anatase to rutile.This improves the TiO2 heat stability. photo-degradation of oily waste water on titanium dioxide under Xe lamp was investigated.The reaction also features the photocatalytic activity of Nano-TiO2.The results indicate that Tb and Nd adoption have a positive effect on the photo-degradation.Lanthanon into titania could efficiently extend photoactivity and expand the visible light response range.

scholarly journals Photocatalytic Activity Enhancement of Low-pressure Cold-Sprayed TiO2 Coatings Induced by Long-term Water Vapor Exposure

2021 ◽  
Author(s):  
Seremak Wioletta ◽  
Baszczuk Agnieszka ◽  
Jasiorski Marek ◽  
Gibas Anna ◽  
Winnicki Marcin
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Water Vapor ◽  
Sol Gel ◽  
Low Pressure ◽  
Oxygen Depletion ◽  
Amorphous Structure ◽  
Industrial Applications ◽  
Additional Parameter

AbstractThis work shows that the titanium dioxide coatings obtained by low-pressure cold gas spraying with the use of the sol–gel amorphous TiO2 powder are characterized by photocatalytic activity despite their partial amorphous content. Moreover, the research outcome suggests that the decomposition rate of organic pollutants is enhanced after long-term exposure to moisture. The condensation humidity test is not detrimental to the continuity and integrity of the coating, but the phase composition of coatings changes—with the exposure to water vapor, the portion of the amorphous phase crystallizes into brookite. The mechanism responsible for the conversion of amorphous TiO2 into brookite is attributed to the water-driven dissolution and reprecipitation of TiO6 octahedra. It has been shown that an additional parameter necessary for the stabilization of the brookite is the oxygen depletion of the amorphous structure of titanium dioxide. Considering the results presented in this paper and the advantages of a portable, low-pressure cold spray system for industrial applications, it is expected that TiO2 coatings produced from a sol–gel feedstock powder can be further developed and tested as efficient photocatalysts.

scholarly journals Visible-enhanced photocatalytic performance of CuWO4/WO3 hetero-structures: incorporation of plasmonic Ag nanostructures

2018 ◽  
Vol 42 (13) ◽  
pp. 11109-11116 ◽  
Author(s):  
R. Salimi ◽  
A. A. Sabbagh Alvani ◽  
N. Naseri ◽  
S. F. Du ◽  
D. Poelman
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
Light Irradiation ◽  
Photo Degradation ◽  
Gel Method ◽  
Sol Gel Method

A new plasmonic Ag hybridized CuWO4/WO3 heterostructured nanocomposite was successfully synthesized via a ligand-assisted sol gel method and the photocatalytic activity was evaluated by photo-degradation of methylene blue (MB) under visible light irradiation.

scholarly journals Synthesis of Titanium Containing SBA-15 and Its Application for Photocatalytic Degradation of Phenol

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Lili Yang ◽  
Zeyu Jiang ◽  
Sufeng Lai ◽  
Chongwen Jiang ◽  
Hong Zhong
Keyword(s):  
Waste Water ◽  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Physicochemical Properties ◽  
Phenol Degradation ◽  
Titanium Content ◽  
Structure Change ◽  
Cyclic Performance ◽  
One Pot ◽  
Simulated Waste

We synthesized Ti-containing SBA-15 by one-pot hydrothermal method and extensively investigated its physicochemical properties and examined its photocatalytic activity to degrade phenol. It’s shown that appropriate amount of titanium could be effectively incorporated into the framework of SBA-15 without provoking structure change and the tetrahedrally coordinated titanium species were well-ordered in Ti-incorporated SBA-15. Under UV-irradiation, the Ti-containing SBA-15 exhibits good photocatalytic activity for phenol degradation in the simulated waste water. The higher photocatalytic activity of Ti-containing SBA-15 to degrade phenol was ascribed to the more titanium content and anatase titanium dioxide. In addition, the new photocatalyst displays a good regeneration and cyclic performance after six runs.

scholarly journals Characterization and Photocatalytic Activity of Nano-TiO2 Doped with Iron and Niobium for Turquoise Blue Dye Removal

2012 ◽  
Vol 12 (1) ◽  
pp. 34 ◽  
Author(s):  
Nhat Minh Doan ◽  
Carl Renan Estrellan ◽  
Anton Purnomo ◽  
Susan Gallardo ◽  
Chris Salim ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Anatase Phase ◽  
Sol Gel ◽  
Chemical Properties ◽  
Band Gap Energy ◽  
Blue Dye ◽  
Nano Tio2 ◽  
Co Doping ◽  
Reaction Rate Constants ◽  
Physical And Chemical

The nano-TiO2 photocatalysts doped with Iron and Niobium for dye wastewater treatment were prepared by temperature-controlled sol-gel method. The effects of these dopants on the physical and chemical properties of TiO2 were compared with the commercially available Degussa TiO2 P25. Among these characteristics are crystalline size, the presence of absolute anatase phase, band gap energy and specific surface area. The characterization data were correlated to photocatalytic activities using Turquoise blue dye (TBD) as model pollutant. Single doping (with Nb) and co-doping (Fe and Nb) catalyst reached complete decolorization within 2.5 hours and 3 hours. In addition, their kinetic reaction rate constants of apparent first-order model are 0.0258 min-1 and 0.0225 min-1, respectively. The presence of Nb as traps is considered to play a crucial key in enhancing the photocatalytic activity.

scholarly journals Synthesis and Photocatalytic Activity of Magnetically Recoverable Core-Shell Nanoparticles

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Zhen Peng ◽  
Hua Tang ◽  
Yao Tang ◽  
Ke Fu Yao ◽  
Hong Hong Shao
Keyword(s):  
Photocatalytic Activity ◽  
High Efficiency ◽  
Sol Gel ◽  
High Photocatalytic Activity ◽  
Core Shell ◽  
Oily Wastewater ◽  
Strong Response ◽  
Shell Nanoparticles ◽  
Oil Concentration ◽  
Core Shell Nanoparticles

TiO2/SiO2/Fe3O4(TSF) core-shell nanoparticles with good photocatalytic activity that are capable of fast magnetic separation have been successfully prepared by chemical coprecipitation and two-step sol-gel process. The as-prepared TSF nanoparticles were calcined at high temperature in order to transform the amorphous titanium dioxide into a photoactive crystalline phase. The calcined nanoparticles are composed of a Fe3O4core with a strong response to external magnetic fields, a SiO2intermediary layer, and a TiO2outshell. Vibration sample magnetometer (VSM) analysis confirms the superparamagnetism of calcined nanoparticles, which can enhance the recoverable properties of the novel photocatalyst. When the TiO2/SiO2/Fe3O4core-shell nanoparticles are added to the crude oily wastewater, they exhibit high photocatalytic activity in the degradation of crude oily wastewater. The oil concentration could be reduced to lower than 30 ppm within 20 minutes for the case of initial oil concentration less than 350 ppm. It has been found that the TSF nanoparticles could be easily separated from the wastewater and withdrawn by using an external magnetic field. The recovered TSF nanoparticles possess high efficiency in the degradation of crude oily wastewater even after three times successive reuse. The present results indicate that TSF core-shell nanoparticles possess great application perspectives in the degradation of crude oily wastewater.

Factors affecting photocatalytic activity of visible light-responsive titanium dioxide doped with chromium ions

2018 ◽  
Vol 8 (18) ◽  
pp. 4726-4733 ◽  
Author(s):  
Naoto Nishiyama ◽  
Keisuke Kozasa ◽  
Toshihiro Okajima ◽  
Mamoru Fujitsuka ◽  
Tetsuro Majima ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Sol Gel ◽  
Factors Affecting ◽  
Gel Method ◽  
Sol Gel Method ◽  
Chromium Ions

Titanium dioxide doped with Cr ions (Cr–TiO2) was synthesized by a sol–gel method, with only water as the solvent, and dialysis.

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