Photocatalytic Degradation of Methyl Orange Using Doped Titanium Dioxide Coating

2014 ◽  
Vol 955-959 ◽  
pp. 112-115
Author(s):  
Li Wang ◽  
Dong Mei Jia ◽  
Zeng Qiang Zhao
Keyword(s):  
Titanium Dioxide ◽  
Methyl Orange ◽  
Degradation Rate ◽  
Methyl Orange Degradation ◽  
Photo Catalytic Activity ◽  
Photocatalytic Activities ◽  
Doped Titanium Dioxide ◽  
La Doped ◽  
Degradation Time ◽  
Degradation Of Methyl Orange

Titanium dioxide (TiO2) coating was prepared through dipping stainless steel net into titanium dioxide sol and then extracting it. The photocatalytic activities for all titanium dioxide coatings were tested by methyl orange degradation under ultraviolet and visible light irradiation. The photo-absorption property was determined by UV-Vis spectrophotometer. The titanium dioxide coating is photo-catalytically reactive for the degradation of methyl orange. The photo-catalytic activity is influenced by extraction times, degradation time, doping element and light source. La-doped titanium dioxide exhibits the best photocatalytic activity in comparison with undoped, V-doped and La-V-codoped ones. The degradation rate of methyl orange by La-doped titanium dioxide coating reaches 92% after 70 minutes irradiation under ultraviolet light.

Hydrothermal Synthesis and Characterisation of Cu Doped TiO2 Nanotubes for Photocatalytic Degradation of Methyl Orange

2014 ◽  
Vol 911 ◽  
pp. 126-130 ◽  
Author(s):  
Mohd Hasmizam Razali ◽  
M.N. Ahmad-Fauzi ◽  
Abdul Rahman Mohamed ◽  
Srimala Sreekantan
Keyword(s):  
Electron Microscopy ◽  
Titanium Dioxide ◽  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Uv Light ◽  
High Surface ◽  
High Surface Area ◽  
Morphological Studies ◽  
Doped Titanium Dioxide ◽  
Degradation Of Methyl Orange

Copper doped titanium dioxide (Cu-TiO2) nanotubes were synthesised by hydrothermal method. The samples were characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and nitrogen gas adsorption. The photocatalytic activity of the copper doped titanium dioxide nanotubes was investigated by photodegradation of methyl orange under UV light. The structural and morphological studies showed that, the copper was incorporated into interstitial positions of the TiO2lattice to form a new phase of TiO2(hexagonal). The copper doped TiO2nanotubes possessed high surface area and pore volume, results high photocatalytic activity for degradation of methyl orange (MO).

Porous TiO2 Film Electrode Used for Photoelectrocatalytic Degradation of Methyl Orange in NaHCO3 Solution

2011 ◽  
Vol 230-232 ◽  
pp. 126-130
Author(s):  
Wen Jie Zhang ◽  
Ke Xin Li
Keyword(s):  
Methyl Orange ◽  
Degradation Rate ◽  
Sol Gel ◽  
Applied Potential ◽  
Methyl Orange Degradation ◽  
Photoelectrocatalytic Degradation ◽  
Degradation Rates ◽  
Negative Effect ◽  
Optimal Values ◽  
Degradation Of Methyl Orange

PEG1000 was used as template to prepare porous TiO2 film by sol-gel method. The functions of applied potential and concentration of NaHCO3 to the photoelectrocatalytic degradation of methyl orange on porous and smooth TiO2 films were investigated. Methyl orange degradation rate has two optimal values at the applied potential of 0.8 V and 1.8 V. The addition of PEG may have negative effect on photoelectrocatalytic activity of TiO2 film. The degradation rate increases with increasing NaHCO3 concentration from 0 up to 0.05 mol/l, and then it declines after further increase of electrolyte concentration. After 100 min of reaction, the degradation rates on the films prepared without and with PEG addition are 63.78% and 65.22%, respectively.

Photocatalytic Methyl Orange Degradation on TiO2-NaX Composite

2010 ◽  
Vol 129-131 ◽  
pp. 804-807
Author(s):  
Hong Wang ◽  
Yang Yu ◽  
Wen Jie Zhang
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Solid State ◽  
Degradation Rate ◽  
Pure Tio2 ◽  
Methyl Orange Degradation ◽  
Maximum Value ◽  
Photocatalytic Activities ◽  
Addition Amount ◽  
Better Than

Photocatalytic activities of simple mixture of TiO2 and NaX, and TiO2-NaX composite prepared by solid-state dispersion method were investigated. Methyl orange degradation rate increased sharply when TiO2 concentration was low and reached its maximum value at TiO2 concentration of 200 mg/l when using pure TiO2. After 120 min of irradiation, methyl orange degradation rate could reach 98.4%, which means nearly all of the dye degraded after two hours. The photocatalytic activity of TiO2 and NaX simple mixture increased with increasing amount of NaX up to 60.4% when NaX amount was 1.4 g/l. The composite TiO2-NaX prepared by grinding had lower activity at various NaX addition amount. The photocatalytic activity of composite TiO2-NaX prepared by solid-state dispersion was better than the composite before calcination. However, the maximum degradation rate was only 41.2%, which was still lower than pure TiO2.

Photocatalytic Degradation of Methyl Orange on the Composite of TiO2 and Lanthanum Niobate

2011 ◽  
Vol 213 ◽  
pp. 63-67
Author(s):  
Wen Jie Zhang ◽  
Xin Sun ◽  
Nan Ge
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Degradation Rate ◽  
Methyl Orange Solution ◽  
Solid State Reaction Method ◽  
Pure Tio2 ◽  
Composite Photocatalyst ◽  
Methyl Orange Degradation ◽  
Orange Solution ◽  
Degradation Of Methyl Orange

In order to improve the photocatalytic activity of TiO2, the optimal catalytic conditions of TiO2 and niobate as well as the composite TiO2 and niobate photocatalyst were studied. 10 mg/l of methyl orange solution was taken as imitated waste water. The results indicated that the optimum dosage of TiO2 was 0.8 g/l. The optimal calcination temperature to prepare lanthanum niobate was 900 oC. n(La):n(Nb) was in the range of 0.6:1−3:1, and the photocatalyst prepared in the ratio of 1.4:1 showed the highest activity. The results also showed that, TiO2-lanthanum niobate composite prepared by solid-state reaction method showed better photocatalytic activity on methyl orange degradation compared with pure TiO2. After 120 minutes of irradiation, methyl orange degradation rate reached 94.2 % when using the composite photocatalyst.

Photo-Catalytic Activity of Fe3+/Sn4+ Co-Doped Titanium Dioxide Nano-Crystalline Thin Films for Methyl Orange Degradation

2007 ◽  
Vol 336-338 ◽  
pp. 1956-1959
Author(s):  
Yun Ping Di ◽  
Wen Li Zhang ◽  
Li Hua Xu ◽  
Chang An Wang ◽  
Ren Bin Shi
Keyword(s):  
Thin Films ◽  
Titanium Dioxide ◽  
Catalytic Activity ◽  
Methyl Orange ◽  
Sol Gel ◽  
Dip Coating ◽  
Photo Catalytic Activity ◽  
Nano Crystalline ◽  
Co Doped ◽  
Degradation Of Methyl Orange

The uniform and transparent nano-crystalline thin films of pure and co-doped with Fe3+/Sn4+ titanium dioxide photo-catalysts were prepared via sol-gel dip-coating process, and were loaded firmly on the surface of glass substrates. The structure and surface morphology of films were characterized by X-ray diffraction (XRD) and atomic force microscopy (AFM). In particular, the photo-catalytic activity of films was measured by ultraviolet-visible (UV-VIS) spectrophotometer. Methyl orange was used as a model compound to study the photo-catalytic activity of films. The effects of the concentrations of doping ions and the number of layers on photo-catalytic degradation of methyl orange solutions were investigated. Experimental results showed clearly that the co-doping of iron and tin ions exhibited a synergistic effect, which increased significantly the photo-catalytic activity of titanium dioxide. Especially, the photo-catalytic activity of nano-crystalline titanium dioxide thin films co-doped with 0.1 mol%Fe3+ and 11.41mol%Sn4+ was 2.0 times higher than that of those un-doped for photo-degradation of methyl orange solutions under the 125W self-ballasted fluorescent high-pressure mercury lamp irradiation.

Photocatalytic Degradation of Methyl Orange Dye with Synthesized Chitosan/Fe2O3Nanocomposite and its Isotherm Studies.

2020 ◽  
Vol 16 ◽  
Author(s):  
Nimisha Jadon ◽  
Gulzar Ahmad Bhat ◽  
Manoharmayum Vishwanath Sharma ◽  
Harendra Kumar Sharma
Keyword(s):  
Methyl Orange ◽  
Dye Degradation ◽  
Dose Effect ◽  
X Ray Diffraction ◽  
Methyl Orange Degradation ◽  
Transmission Electron ◽  
Fourier Transformation Infrared Spectroscopy ◽  
Vis Spectroscopy ◽  
Methyl Orange Dye ◽  
Degradation Of Methyl Orange

Background: The study focuses on the synthesis of chitosan/ Fe2O3 nanocomposite, its characterization and application in methyl orange dye degradation. Methods: The synthesized chitosan/ Fe2O3 nanocomposite was characterized with Powder X-Ray Diffraction, Fourier Transformation Infrared Spectroscopy (FTIR), Transmission Electron Microscopy (TEM) and UV-Vis Spectroscopy. Results: The characterization showed that the Fe2O3nanoparticles were embedded in the polymer matrix of chitosan. The size of the Fe2O3nanoparticles were less than 10nm and the crystallite size was 1.22 nm.The synthesized chitosan/ Fe2O3nanocomposite was tested for methyl orange degradation using different parameters such as effect of contact time, effect of dose, effect of concentration and effect of pH for the degradation of methyl orange dye in aqueous solution.The Fruendlich, Langmuir and Temkin isotherm studies were also conducted for adsoption of methyl orange on Chitosan/ Fe2O3nanocomposite. Conclusion: The study indicated that the synthesized chitosan/Fe2O3 nanocomposite had the potential of degrading methyl orange dye up to 75.04% under the set condition in this experiment which indicate that Chitosan/ Fe2O3 nanocomposite is a viable option that can be used for the degradation of methyl orange dye.

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