Effect of SnO2 Addition into TiO2 Thin Films on Photocatalytic Activity and Hydrophilic Property

2014 ◽  
Vol 979 ◽  
pp. 90-93 ◽  
Author(s):  
Weerachai Sangchay ◽  
Tanarat Rattanakool
Keyword(s):  
Thin Films ◽  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Uv Irradiation ◽  
Sol Gel ◽  
Dip Coating ◽  
Photocatalytic Activities ◽  
Self Cleaning ◽  
Xrd Techniques ◽  
Dip Coating Technique

The pure TiO2and SnO2-TiO2thin films on glass substrate were fabricated using a sol-gel dip coating technique. The thin films were annealed at the temperature of 700 °C for 2 h with the heating rate of 10 °C/min. The microstructures of the fabricated thin films were characterized by SEM and XRD techniques. The photocatalytic activities of the thin films were also tested by the degradation of methylene blue (MB) solution under UV irradiation. Finally, hydrophilic or self-cleaning properties of thin films were evaluated by measuring the contact angle of water droplet on the thin films with and without UV irradiation. It was found that 1 %mol SnO2-TiO2thin films shows the highest of photocatalytic activity and provide the most self-cleaning properties.

Photocatalytic Degradation of Methylene Blue by NiO Thin Films under Solar Light Irradiation

2019 ◽  
Vol 56 ◽  
pp. 152-157 ◽  
Author(s):  
Abdelouahab Noua ◽  
Hichem Farh ◽  
Rebai Guemini ◽  
Oussama Zaoui ◽  
Tarek Diab Ounis ◽  
...  
Keyword(s):  
Thin Films ◽  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Sol Gel ◽  
Visible Region ◽  
Optical Transmittance ◽  
Dip Coating ◽  
Light Irradiation ◽  
Solar Light ◽  
Solar Light Irradiation

Nickel oxide (NiO) thin films were successfully deposited by sol-gel dip-coating method on glass substrates. The structural, morphological and optical properties in addition to the photocatalytic activity of the prepared films were investigated. The results show that the films have a polycrystalline NiO cubic structure with dense NiO grains and average optical transmittance in the visible region. The photocatalytic properties of the films were studied through the degradation of methylene blue and 89% of degradation was achieved for 4.5h of solar light irradiation exposure which indicates the capability of NiO photocatalytic activity.

Photocatalytic and Self-Cleaning Properties of TiO2-Cu Thin Films on Glass Substrate

2012 ◽  
Vol 152-154 ◽  
pp. 409-413 ◽  
Author(s):  
Weerachai Sangchay ◽  
Lek Sikong ◽  
Kalayanee Kooptarnond
Keyword(s):  
Thin Films ◽  
Contact Angle ◽  
Uv Irradiation ◽  
Sol Gel ◽  
Dip Coating ◽  
Glass Slides ◽  
Coating Method ◽  
Small Contact Angle ◽  
Self Cleaning ◽  
Dip Coating Method

TiO2-Cu thin films containing 0 to 1%Cu coated on glass slides were prepared by sol gel-dip coating method. The prepared thin films were synthesized at the temperature of 400 ◦C for 2 h with a heating rate of 10◦C/min. The microstructures of synthesized TiO2-Cu thin films were characterized by XRD, FT-IR and SEM. The photocatalytic activities of TiO-2Cu thin films were tested using methylene blue (MB) solution under UV irradiation. Finally, the self-cleaning property was evaluated by means of contact angle of water droplet on the films. The results show all samples have the thickness in range of 1 um and surfaces are dense with a large surface area. It can be noted that TiO2-1.0Cu thin films were found to give the highest photocatalytic efficiency and exhibited self-cleaning effect (small contact angle, 17°) under UV irradiation.

N,Fe Nano-TiO2 Doped on the Fly Ash Forming Absorbent and the Photocatalytic Activity Study

2013 ◽  
Vol 773 ◽  
pp. 912-916
Author(s):  
Yong Mei Liu ◽  
Zhuan Nian Liu ◽  
Xiao Gang Han
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Fly Ash ◽  
Visible Light Irradiation ◽  
Degradation Rate ◽  
Sol Gel ◽  
Visible Region ◽  
Dip Coating ◽  
Structure And Properties ◽  
Dip Coating Technique

nanoTiO2photocatalyst modified by N and Fe3+ion were loaded on fly ash forming adsorbent (FFA) using the sol-gel dip-coating technique. The structure and properties of the samples were characterized by UV-Vis spectrum, SEM and XRD. The related influencing factors were also discussed. The results showed that modified TiO2was immobilized on the surface of FFA in the form of nanocrystalline and an apparent absorption peak appears in the visible region of photocatalyst doped with N,Fe ion. Moreover, under visible light irradiation for 6h, the degradation rate of 50mg/L of methylene blue by loaded catalyst reached 92.6 %.

scholarly journals Enhanced visible transmittance and reduced transition temperature for VO2 thin films modulated by index-tunable SiO2 anti-reflection coatings

RSC Advances ◽  
2018 ◽  
Vol 8 (51) ◽  
pp. 28953-28959 ◽  
Author(s):  
Maodong Zhu ◽  
Hongji Qi ◽  
Bin Wang ◽  
Hu Wang ◽  
Dongping Zhang ◽  
...  
Keyword(s):  
Thin Films ◽  
Transition Temperature ◽  
Sol Gel ◽  
Dip Coating ◽  
Coating Technique ◽  
Infrared Transmittance ◽  
Visible Transmittance ◽  
P Index ◽  
Dip Coating Technique ◽  
Vo2 Thin Films

Index-tunable anti-reflection SiO2 coatings prepared on the surface of VO2 films by sol–gel dip-coating technique to enhance the visible and infrared transmittance of SiO2/VO2 films.

Photocatalytic Degradation of Humic Acid Using Fe3+ and N-Doped 3SnO2/TiO2 Thin Films Coated on Glass Fibers

2014 ◽  
Vol 608 ◽  
pp. 164-169
Author(s):  
Peerawas Kongsong ◽  
Lek Sikong ◽  
Sutham Niyomwas ◽  
Vishnu Rachpech
Keyword(s):  
Thin Films ◽  
Photocatalytic Activity ◽  
Humic Acid ◽  
Glass Fibers ◽  
Sol Gel ◽  
Composite Films ◽  
Dip Coating ◽  
High Photocatalytic Activity ◽  
Coating Methods ◽  
Uv Lamp

The Fe3+ and N–doped 3SnO2/TiO2 composite thin films and undoped films coated on glass fibers were prepared by sol–gel and dip–coating methods. The films were calcined at 600°C for 2 hour and characterized by XRD, SEM, EDS and XPS. The photocatalytic activity of the coated glass fibers was determined by means of degradation of a methylene blue (MB) solution and humic acid (HA). It was found that the optimized 20N/3SnO2/TiO2composite films exhibit a high photocatalytic activity and HA could be rapidly removed from water. The main factor affecting the HA degradation of 20N/3SnO2/TiO2 films is quantity of glass fibers loading, irradiation power of UV lamp and flow rate of water.

Hydrophilic and Photocatalytic Performances of Y-Doped Titanium Dioxide Thin Films

2013 ◽  
Vol 651 ◽  
pp. 103-108
Author(s):  
Jun Du ◽  
Yan Bin Yu ◽  
Jing Jing Huang ◽  
Hua Qiang Fu ◽  
Bu Hui Li ◽  
...  
Keyword(s):  
Thin Films ◽  
Methylene Blue ◽  
Contact Angle ◽  
Photocatalytic Activity ◽  
Calcination Temperature ◽  
Crystalline Phase ◽  
Sol Gel ◽  
Tetrabutyl Titanate ◽  
Continuous Increase ◽  
Photocatalytic Performances

Pure and Y-doped TiO2 thin films are prepared on glass by sol-gel method. Tetrabutyl titanate was used as Ti precursors. The chemical composition, structure and properties of TiO2 thin films are characterized by XRD, FT-IR, UV-Vis and Optical Contact Angle Measuring Instrument. Their photocatalytic performances were studied in detail by the methylene blue degradation model. The results show that the crystalline phase of Y2Ti2O7 is formed and the phase transformation from anatase to rutile is restrained when Y is doped in the TiO2 thin films. However, with the continuous increase in calcination temperature, its photocatalytic activity decreases, because the anatase will transform to the rutile. The proper amount of Y doping will cause the lattice to expand, the new defects will form and the smaller band-gap energy will be revealed. Thus, the absorption ability toward the ultraviolet can be improved, the redshift of the absorption band can also be found. As the results of it, the hydrophilicity and photocatalytic efficiency can improved. Furthermore, the photocatalytic activity increases with the hydrophilicity. When the calcination temperature of thin films is 450oC and the Y-doping is 0.3%, the main crystalline phase of the samples is the anatase, the contact angle is only 13.7o and the degradation ratio of methylene blue reached 98.84%.

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