Electro-Assisted Photocatalytic Degradation of Methyl Orange on TiO2 Film Using NH4Cl as Electrolyte

2012 ◽  
Vol 487 ◽  
pp. 640-643
Author(s):  
Wen Jie Zhang ◽  
Fei Fei Bi ◽  
Hong Bo He
Keyword(s):  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Sol Gel ◽  
Degradation Process ◽  
Porous Film ◽  
Film Electrode ◽  
Noticeable Effect ◽  
Methyl Orange Degradation ◽  
Smooth Film ◽  
Degradation Of Methyl Orange

Porous and smooth TiO2 film electrodes prepared by sol-gel method were used on methyl orange degradation by an electro-assisted photocatalytic degradation process. The results indicates that methyl orange was barely degraded under the potential alone, availing that potential under 1.8 V had no noticeable effect on removal of the dye. The porous film electrode showed better electro-assisted photocatalytic activity than the smooth film electrode when the potential was above 0.6 V. The porous film showed better activity than the smooth film in nearly all the concentration range except for the highest one. The porous film exhibited better activity than the smooth one.

Electro-Assisted Photocatalytic Degradation of Methyl Orange on TiO2 Film Using NaCl as Electrolyte

2012 ◽  
Vol 457-458 ◽  
pp. 1169-1172
Author(s):  
Wen Jie Zhang ◽  
Mei Ling Hu ◽  
Hong Bo He
Keyword(s):  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Tio2 Film ◽  
Sol Gel ◽  
Porous Electrode ◽  
Degradation Process ◽  
Film Electrode ◽  
Degradation Rates ◽  
Smooth Film ◽  
Degradation Of Methyl Orange

Porous and smooth TiO2 film electrodes prepared by sol-gel method were used on methyl orange degradation by an electro-assisted photocatalytic degradation process. When using the applied potential along, there was no obvious degradation of methyl orange whether using TiO2 film electrode prepared using PEG template or not. The largest difference between the two electrodes appears at potential of 0.7 V in 0.05 mol/l NaCl solution, and the porous electrode shows better degradation activity in electro-assisted photocatalytic degradation. When NaCl concentration was 0.07 mol/l, degradation rates on porous and smooth film electrodes were 51.16% and 32.35 %, respectively. After 100 min of irradiation, 90% of the methyl orange degraded on the porous TiO2 film electrode, and 79.87% of the methyl orange degraded on the smooth TiO2 film electrode.

Electro-Assisted Photocatalytic Degradation of Methyl Orange on TiO2 Film Using CaСl2 as Electrolyte

2012 ◽  
Vol 487 ◽  
pp. 635-639
Author(s):  
Wen Jie Zhang ◽  
Hong Liang Xin ◽  
Hong Bo He
Keyword(s):  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Tio2 Film ◽  
Sol Gel ◽  
Degradation Process ◽  
Applied Potential ◽  
Methyl Orange Degradation ◽  
Degradation Rates ◽  
Smooth Film ◽  
Better Than

Porous and smooth TiO2 film electrodes prepared by sol-gel method were used on methyl orange degradation by an electro-assisted photocatalytic degradation process. Methyl orange cannot be degraded under applied potential solely below 2.0 V. When the applied potential was below 1.3 V, methyl orange degradation rates on porous TiO2 film increased from 5% at 0 V to 65.3% at 1.3 V, and degradation rates on smooth TiO2 film changed from 2.2% at 0 V to 61.1% at 1.3 V. Electro-assisted photocatalytic degradation rate on porous film was better than that on smooth film in the whole electrolyte concentration range. Electro-assisted degradation exhibited the same rising trend along with reaction time on the porous and smooth films.

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.

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.

scholarly journals Inspired Preparation of Zinc Oxide Nanocatalyst and the Photocatalytic Activity in the Treatment of Methyl Orange Dye and Paraquat Herbicide

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Ghaida H. Munshi ◽  
Amal M. Ibrahim ◽  
Laila M. Al-Harbi
Keyword(s):  
Zinc Oxide ◽  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Analytical Techniques ◽  
Degradation Process ◽  
Naturally Occurring ◽  
Uv Lamp ◽  
Degradation Of Methyl Orange

As the need to use green chemistry routes increases, environmentally friendly catalytic processes are a demand. One of the most important and abundant naturally occurring catalysts is chlorophyll. Chlorophyll is the first recognized catalyst; it is a reducing agent due to its electron-rich structure. The effects of spinach on the preparation of zinc oxide nanoparticles and the photocatalytic degradation of methyl orange and paraquat in sunlight and under a UV lamp and photocatalytic degradation in sunlight were studied. Different parameters of the catalytic preparation process and photocatalytic degradation process were studied. Characterization of differently prepared samples was carried out using different analytical techniques such as XRD, SEM, and EDX and finally the photocatalytic activity towards decomposition of methyl orange and paraquat.

Super-Hydrophilic and Photocatalytic Properties of Ag-TiO2 Thin Films Prepared by Sol–Gel Technique

2008 ◽  
Vol 11 (2) ◽  
Author(s):  
Suhas R. Patil ◽  
Urška Lavrenčič Štangar ◽  
Silvia Gross ◽  
Ulrich Schubert
Keyword(s):  
Thin Films ◽  
Methyl Orange ◽  
Comparative Study ◽  
Photocatalytic Degradation ◽  
Methyl Stearate ◽  
Sol Gel ◽  
Tio2 Thin Films ◽  
Solid Interface ◽  
Gel Technique ◽  
Degradation Of Methyl Orange

AbstractA comparative study of photocatalytic degradation of methyl orange (liquid-solid interface) and methyl stearate (solid-solid interface) was performed with three different kinds of transparent pure and Ag-doped TiO

Preparation of TiO2 Photocatalyst Loaded Bentonite Material and Study of Catalytic Degradation

2014 ◽  
Vol 809-810 ◽  
pp. 860-866 ◽  
Author(s):  
Ce Wang ◽  
Long Gui Peng ◽  
Qiao Qiao Zhang ◽  
Lu Ying Qiu ◽  
Zai Yong Zhang
Keyword(s):  
Reaction Time ◽  
Methyl Orange ◽  
Process Parameters ◽  
Sol Gel ◽  
Degradation Process ◽  
Single Factor ◽  
Illumination Time ◽  
Prepared Material ◽  
The Relationship ◽  
Degradation Of Methyl Orange

A intercalated TiO2photocatalyst loaded bentonite was prepared by sol-gel method. The effect of reaction time, reaction temperature,the amount of butyl titanate and other process parameters on prepared material of degradation of methyl orange,as well as the relationship between the concentration of methyl orange on degradation process and illumination time were discussed by single factor method.The results showed : the first absorbance of the intercalated TiO2photocatalyst loaded bentonite material was 0.342 and the average absorbance was respectively 0.7402 through 5 washing after the intercalated TiO2photocatalyst loaded bentonite irradiated at UV-irradiation 1.5h to 20mg/L methyl orange.

Photocatalytic Activity of TiO2 Coated on HZSM-5 Prepared by Oxalic Acid Treatment

2012 ◽  
Vol 424-425 ◽  
pp. 633-636
Author(s):  
Wen Jie Zhang ◽  
Jin Lei Chen ◽  
Hong Bo He
Keyword(s):  
Methyl Orange ◽  
Oxalic Acid ◽  
Reaction Kinetic ◽  
Kinetic Constant ◽  
Sol Gel ◽  
Methyl Orange Degradation ◽  
First Order ◽  
Maximum Value ◽  
Decoloration Rate ◽  
Degradation Of Methyl Orange

Zeolite HZSM-5 was pre-treated by oxalic acid and used as support for TiO2film prepared by sol-gel method. Decoloration rates increased with TiO2concentration both for pure TiO2and TiO2/HZSM-5. Meanwhile, the total decoloration rate on TiO2/HZSM-5 is much higher than using pure TiO2on all TiO2concentrations. Methyl orange degradation on TiO2/HZSM-5 reached its maximum value at TiO2concentration of 600 mg/l. After 120 min of irradiation, decoloration rate on TiO2/HZSM-5 was near 100%, compared with 50% decoloration on pure TiO2. Photocatalytic degradation of methyl orange on both TiO2/HZSM-5 and TiO2follows the equation of first order reaction. Kinetic constant on TiO2/HZSM-5 is k1=0.02663 min-1, which is much higher than that on pure TiO2, k2=0.010154 min-1.

Sign in / Sign up

Export Citation Format

Share Document