Preparation of F, Cl and Nitrogen Doped TiO2 and their Photocatalytic Properties Research

2013 ◽  
Vol 423-426 ◽  
pp. 560-564
Author(s):  
Chen Tao Hou ◽  
Fei Lv
Keyword(s):  
Ammonium Chloride ◽  
Degradation Rate ◽  
Sol Gel ◽  
Good Condition ◽  
Catalytic Performance ◽  
Visible Condition ◽  
Roasting Temperature ◽  
Doping Ratio ◽  
Co Doped ◽  
Better Than

In the paper, sol-gel method has been used to make F-N, Cl-N co-doped TiO2 photocatalyst by the artificial zeolite as a carrier. The optimum doping and the best roasting temperature was found. The results showed that N, F co-doped photocatalyst can calcine at 400 °C, and when used in the best doping ratio as n (n-butyl titanate): n (ammonium chloride): n(N)= 1:0.01:0.012, its degradation rate can reach 92.4% in 3.5 hours. The N, Cl co-doped can calcine at 500 °C, and when used in the best doping ratio as n (n-butyl titanate): n (ammonium chloride):n(N) = 1:0.01:0.012 ,and the degradation rate of up to 88% in 3.5 hours. Scanning electron microscopy SEM and UV-visible spectrophotometry methods were used to analysis them,The results show that the experiment photocatalyst prepared in good condition. In the visible condition of the catalytic performance. The effection of F-N catalytic is better than Cl-N, and the degradation of methylene blue in 3.5 hours can reach 92.4%.

Preparation of Novel Ag–Si–TiO2 Composite and Research on Its Photocatalytic Degradation of Formaldehyde

2021 ◽  
Vol 13 (3) ◽  
pp. 371-380
Author(s):  
Yongjun Wu ◽  
Nina Xie ◽  
Lu Yu
Keyword(s):  
Photoelectron Spectroscopy ◽  
Removal Rate ◽  
Sol Gel ◽  
Catalytic Performance ◽  
Formaldehyde Concentration ◽  
Order Kinetic ◽  
Solution Ph ◽  
Visible Absorption ◽  
X Ray ◽  
Co Doped

A novel Ag–Si–TiO2 composite was prepared via sol–gel method for removing residual formaldehyde in shiitake mushroom. The structure of Ag–Si–TiO2 composite was characterized by scanning electron microscope (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analyses. Ultraviolet-visible absorption spectroscopy (UV-Vis) and N2 adsorption-desorption tests showed that Ag and Si co-doped decreased the band gap, the Brunauer-Emmett-Teller (BET) specific surface area of the samples increased and the recombination probability of electron-hole pairs (e--h+) reduced. Effect on removal rate of formaldehyde with different Ag-Si co-doped content, formaldehyde concentration and solution pH were investigated, and the results showed that 6.0 wt%Ag-3.0 wt%Si-TiO2 samples had an optimum catalytic performance, and the degradation efficiency reached 96.6% after 40 W 365 nm UV lamp irradiation for 360 min. The kinetics of formaldehyde degradation by Ag–Si–TiO2 composite photocatalyst could be described by Langmuir-Hinshelwood first-order kinetic model.

Degradation of Phenol by Fe3+ Doped Nano-TiO2 Photocatalyst

2013 ◽  
Vol 859 ◽  
pp. 361-364 ◽  
Author(s):  
Jing Wang ◽  
Du Shu Huang ◽  
Wei Liu ◽  
Qing Shan Pan ◽  
Yong Min
Keyword(s):  
Degradation Rate ◽  
Annealing Temperature ◽  
Sol Gel ◽  
Phenol Degradation ◽  
Nano Tio2 ◽  
Phenol Solution ◽  
Sol Gel Process ◽  
Two Peaks ◽  
Degradation Properties ◽  
Better Than

Degradation properties of phenol using nano-TiO2 as photocatalyst in aqueous solution were investigated. The effect of annealing temperature and ionic modification on the degradation was studied. The results showed that, 500 °C annealed TiO2 was better than 700 °C annealed. Photocatalyst nano-TiO2 material doped with Fe3+ was prepared quickly by sol-gel process and was used as photocatalyst to degrade phenol solution of 100mg/L under UV irradiation for 3 hours. UV spectrophotometer testing was made and found that two peaks at 210 nm and 270 nm were significantly become low, indicating that the phenol has been degraded. The phenol degradation rate was 94.18%.

scholarly journals Preparation of Stellerite Loading Titanium Dioxide Photocatalyst and Its Catalytic Performance on Methyl Orange

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Hua Chen ◽  
Jianhua Wang ◽  
Huajun Wang ◽  
Fei Yang ◽  
Jia-nan Zhou ◽  
...  
Keyword(s):  
Surface Area ◽  
Sol Gel ◽  
Catalytic Performance ◽  
Bet Surface Area ◽  
X Ray Diffraction ◽  
Photocatalytic Ability ◽  
X Ray ◽  
Composite Photocatalysts ◽  
Ft Ir ◽  
Better Than

TiO2/stellerite composite photocatalysts were prepared by dispersing TiO2 onto the surface of HCl, NaOH, or NaCl treated stellerite using a sol-gel method. The materials were characterized by scanning electron microscopy (SEM), energy dispersive X-ray (EDX), Fourier transform infrared spectroscopy (FT-IR), BET surface area analysis, and X-ray diffraction (XRD). HCl and NaCl modification result in the promotion of the pore formation at the stellerite surfaces and induced the microscopic changes, while the surface morphology and structure of the stellerite were almost ruined by NaOH modification. Supported TiO2 calcinated at 200°C presented anatase structure. The photocatalytic degradation activities of TiO2 loaded HCl and NaCl modified stellerite were better than that of natural stellerite, accompanied with increasing specific surface area. On the contrary, NaOH modification induced the loss of photocatalytic ability of composite due to the generation of silicates.

Photocatalytic Removal of Cu(II) Ions from Water Using TiO2-Modified Bamboo Charcoal

2012 ◽  
Vol 557-559 ◽  
pp. 1057-1061
Author(s):  
Chang Bin Xia ◽  
Chun Hua Liu ◽  
Dao Xin Wu
Keyword(s):  
Reaction Time ◽  
Degradation Rate ◽  
Removal Rate ◽  
Waste Water Treatment ◽  
Sol Gel ◽  
Bamboo Charcoal ◽  
Photocatalytic Removal ◽  
Roasting Temperature ◽  
Catalyst Dosage ◽  
Solution Acidity

The photocatalytic reduction of Cu(II) under UV irradiation in presence of citric acid (CA) as acrificial agent has been investigated using TiO2-modified bamboo charcoal as photocatalysts prepared with Sol-Gel method. The influence of the catalyst dosage, Cu(II) of the initial quality concentration, photocatalytic time, catalyst roasting temperature and the solution acidity to Cu(II) removal rate has been explored. The best conditions of Cu(II)-containing waste water treatment were determined.The results show that the effect is the optimum when the pH is 7.0, the photocatalytic reaction time is more than 60min, the usage amount of catalyst is 8 g/L and the photocatalyst is calcinated for 2h at 500°C.The degradation rate of Cu(II) ion can be improved using appropriate extension reaction time method.

Influence of Sm3+ and Gd3+ Co-Doping on Photocatalytic Activity of TiO2

2011 ◽  
Vol 239-242 ◽  
pp. 1045-1048
Author(s):  
Xu Dong Lu ◽  
Cheng Zhi Jiang
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Phase Transformation ◽  
Photocatalytic Activity ◽  
Degradation Rate ◽  
Sol Gel ◽  
Nano Particles ◽  
Co Doping ◽  
The Matrix ◽  
Co Doped

Pure TiO2, Sm3+and Gd3+co-doping TiO2have been prepared by sol-gel method and characterized by the techniques such as XRD and SEM. The photocatalytic degradation of methylene blue (MB) in aqueous solution was used as a probe reaction to evaluate Pure TiO2, Sm3+and Gd3+co-doping TiO2photocatalytic activity. The matrix distortion of TiO2increases after co-doping of Sm3+and Gd3+are clearly observed. The results show that co-doping of Sm3+and Gd3+inhibits the phase transformation of TiO2from anatase to rutile, decreases the diameter of TiO2nano-particles and significantly enhance the photocatalytic activity of TiO2. When the co-doped amounts for Sm3+and Gd3+are 0.1% and 0.2%, its degradation rate reaches 99%.

Methyl Orange Photoelectrocatalytic Degradation Using Porous TiO2 Film Electrode in NaH2PO4 Solution

2012 ◽  
Vol 433-440 ◽  
pp. 411-415
Author(s):  
Wen Jie Zhang ◽  
Ke Xin Li ◽  
Jia Wei Bai
Keyword(s):  
Methyl Orange ◽  
Degradation Rate ◽  
Removal Rate ◽  
Sol Gel ◽  
Degradation Process ◽  
Film Electrode ◽  
Applied Potential ◽  
Gel Method ◽  
Photoelectrocatalytic Degradation ◽  
Better Than

Porous TiO2 film was prepared by a sol-gel method using PEG1000 as pore forming template. The porous film and normal film were used as electrodes in a photoelectrocatalytic reactor. The functions of applied potential and concentration of NaH2PO4 to the photoelectrocatalytic degradation process of methyl orange were investigated. The results show that methyl orange cannot be degraded solely by the applied potential. Under the applied potential of 2 V, 49.9% of the initial dye can be removed on the normal TiO2 film electrode, which is much better than the 31.1% removal rate on the porous TiO2 film electrode. The normal TiO2 film electrode has better performance than the porous TiO2 film in the whole NaH2PO4 concentration range. After 80 min of reaction, degradation rate is 93.7% on the normal TiO2 film electrode. After 100 min of reaction, degradation rate is 89.7% on the porous TiO2 film electrode.

Comparative Study on the Effect of Preparation of TiO2 and the Photocatalytic Degradation of Phenol Based on the Biological Template

2014 ◽  
Vol 908 ◽  
pp. 195-198
Author(s):  
Jing Wang ◽  
Li Da Sun ◽  
Zi Jing Li ◽  
Yan Hua Tang
Keyword(s):  
Photocatalytic Activity ◽  
Comparative Study ◽  
Photocatalytic Degradation ◽  
Uv Irradiation ◽  
Degradation Rate ◽  
Sol Gel ◽  
Catalytic Performance ◽  
High Photocatalytic Activity ◽  
Template Method ◽  
Tio2 Photocatalysts

This study combines the template method and sol-gel method, prepares TiO2 photocatalytic materials with the cotton, leaves and towel gourd as the template, and then makes degradation of phenol in ultraviolet light with the prepared TiO2 photocatalysts. The results show that all the photocatalyst prepared with three kinds of templates have high photocatalytic activity, among which, the catalytic performance of cotton is better, leaves secondly, and towel gourd’s relatively poor. With cotton as templates for the preparation of TiO2 under UV irradiation for 6h, the degradation rate was 80%, leaves as template for the preparation of TiO2 under UV irradiation for 6h, the degradation rate was 63%, and with towel gourd as template for the preparation of TiO2 under UV irradiation for 6h, the degradation rate was 52%.

Preparation of N-Ce Co-Doped TiO2 Nanopaticles and their Photocatalytic Performance under Visible Light

2012 ◽  
Vol 457-458 ◽  
pp. 1035-1038 ◽  
Author(s):  
Gui Hua Li ◽  
An Feng Wang
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Reaction Temperature ◽  
Degradation Rate ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
Solution Ph ◽  
Catalyst Amount ◽  
Sol Gel Process ◽  
Co Doped

In this present work, N-Ce co-doped TiO2 nanopaticles were prepared via sol-gel process and characterized by TG - DTA and XRD. Their performance of photocatalytic degradation of methylene blue under visible light were investigated. N-Ce co-doped TiO2 appeared to be somewhat more efficient than the starting TiO2. The effects of catalyst compsition, catalyst amount, reaction temperature and solution pH on their photocatalytic activity towards methylene blue were studied and discussed. Experiment results depicted that activeness of catalyst N0.4Ce0.06/TiO2 was highest. Using this catalyst, when the catalyst amount was 0.3 g/L，the reaction temperature was 40 °C and pH of the solution was 9.0 the degradation rate of mehylene blue in 4h could reach 94.00%.

scholarly journals Study on the effect of Fe and N co-doped supported TiO2/GF photocatalytic oxidation of nitrobenzene wastewater

2021 ◽  
Vol 237 ◽  
pp. 01036
Author(s):  
Yafeng Li ◽  
Qun Fu ◽  
Jiahui Yu
Keyword(s):  
Water Treatment ◽  
Photocatalytic Oxidation ◽  
Supported Catalysts ◽  
Catalytic Performance ◽  
Industrial Water ◽  
Removal Rates ◽  
Supported Tio2 ◽  
Co Doped ◽  
Better Than

This research aims to treat the refractory nitrobenzene wastewater in the industrial water treatment industry with modified supported TiO2, and to study its influence on the treatment effect.Experiments have found that by preparing Fe and N co-doped TiO2/GF supported catalysts, it has better catalytic performance. Under the same conditions, Fe and N co-doped TiO2/GF can degrade nitrobenzene wastewater better than single Doped with Fe-TiO2/GF and N-TiO2/GF, the removal rates of nitrobenzene and COD are as high as 97.2% and 92.5%, respectively.The Fe and N co-doped TiO2/GF catalyst overcomes the agglomeration of traditional powdered TiO2 in solution, and has a good removal effect on nitrobenzene wastewater.

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