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.

scholarly journals Photocatalytic Antibacterial Performance of Glass Fibers Thin Film Coated with N-DopedSnO2/TiO2

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Peerawas Kongsong ◽  
Lek Sikong ◽  
Sutham Niyomwas ◽  
Vishnu Rachpech
Keyword(s):  
Glass Fibers ◽  
Anatase Phase ◽  
Sol Gel ◽  
Composite Films ◽  
Salmonella Typhi ◽  
Dip Coating ◽  
Water Disinfection ◽  
E Coli ◽  
Antibacterial Performance ◽  
Coating Methods

Both N-doped and undoped thin films of 3SnO2/TiO2composite were prepared, by sol-gel and dip-coating methods, and then calcined at 600°C for 2 hours. The films were characterized by FTIR, XRD, UV-Vis, SEM, and XPS, and their photocatalytic activities to degrade methylene blue in solution were determined, expecting these activities to correlate with the inactivation of bacteria, which was confirmed. The doped and undoped films were tested for activities against Gram-negativeEscherichia coli(E. coli) andSalmonella typhi(S. typhi), and Gram-positiveStaphylococcus aureus(S. aureus). The effects of doping on these composite films included reduced energy band gap, high crystallinity of anatase phase, and small crystallite size as well as increased photocatalytic activity and water disinfection efficiency.

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.

Sol-gel synthesis and characterization of Ag nanoparticles in ZrO2 thin films

2009 ◽  
Vol 24 (8) ◽  
pp. 2541-2546 ◽  
Author(s):  
Eisuke Yokoyama ◽  
Hironobu Sakata ◽  
Moriaki Wakaki
Keyword(s):  
Thin Films ◽  
Sol Gel ◽  
Composite Films ◽  
Dip Coating ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
Silver Surface ◽  
Molar Ratios ◽  
Sol Gel Synthesis

ZrO2 thin films containing silver nanoparticles were prepared using the sol-gel method with Ag to Zr molar ratios [Ag]/[Zr] = 0.11, 0.25, 0.43, 0.67, 1.00, 1.50, and 2.33. After dip coating on glass substrate, coated films were annealed at 200 and 300 °C in air. X-ray diffraction peaks corresponding to crystalline Ag were observed, but a specific peak corresponding to ZrO2 was not observed. At the molar ratio [Ag]/[Zr] = 0.25, the particle size of Ag distributed broadly centered at 17 nm for an annealing temperature of 200 °C and at 25 nm for 300 °C. The films annealed in air at 200 °C showed an absorption band centered at 450 nm because of the silver surface plasmon resonance, whereas films heated at 300 °C in air caused a red shift of the absorption to 500 nm. The absorption peak was analyzed using the effective dielectric function of Ag-ZrO2 composite films modeled with the Maxwell-Garnett expression.

scholarly journals Sol-Gel Synthesis of TiO2/SiO2 and ZnO/SiO2 Composite Films and Evaluation of Their Photocatalytic Activity towards Methyl Green

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
V. L. Chandraboss ◽  
B. Karthikeyan ◽  
J. Kamalakkannan ◽  
S. Prabha ◽  
S. Senthilvelan
Keyword(s):  
Photocatalytic Activity ◽  
Uv Light ◽  
Sol Gel ◽  
Composite Films ◽  
Dip Coating ◽  
Methyl Green ◽  
Visible Spectroscopy ◽  
X Ray ◽  
Coating Method ◽  
Dip Coating Method

The TiO2/SiO2 and ZnO/SiO2 composite films were prepared by sol-gel dip coating method. The surface morphology and crystal structure of thin films were characterized by means of scanning electron microscopy (SEM) with elementary dispersive X-ray analysis (EDX) and X-ray diffractometer (XRD). Optical properties of films have been investigated using ultraviolet and visible spectroscopy (UV-visible spectroscopy). The photocatalytic activity was established by testing the degradation and decolorization of methyl green (MG) from aqueous solution with artificial UV-light.

X-ray diffraction analysis for thin films of PbTiO3-La2/3TiO3 prepared by the sol-gel method

1994 ◽  
Vol 9 (8) ◽  
pp. 2133-2137 ◽  
Author(s):  
Hideki Yoshioka
Keyword(s):  
Thin Films ◽  
Perovskite Phase ◽  
Sol Gel ◽  
Diffraction Method ◽  
Dip Coating ◽  
X Ray Diffraction ◽  
X Ray ◽  
Coating Methods ◽  
Diffraction Patterns ◽  
System 1

Thin films in the system (1 - x) PbTiO3−xLa2/3TiO3 were prepared by the sol-gel and dip-coating methods. Phases deposited in the films and the lattice parameters as a function of the composition were investigated by the x-ray diffraction method. The solid solutions with a perovskite structure were formed as a single phase with x up to 0.9. For the composition of x = 1.0, metastable La-Ti-O perovskite phase with a small amount of the impurity phase, La2Ti2O7, was obtained. Simulation of x-ray diffraction patterns based on the defect structure model shows that the structure of the La-Ti-O perovskite phase includes randomly distributed cation vacancies at the A-site, namely (La2/3□1/3)TiO3.

Photocatalytic Properties of Nitrogen-Sulfur Co-Doped TiO2 Films Coated on Glass Fiber

2013 ◽  
Vol 781-784 ◽  
pp. 2237-2240 ◽  
Author(s):  
Benjamas Noophum ◽  
Lek Sikong ◽  
Kalayanee Kooptanond
Keyword(s):  
Photocatalytic Activity ◽  
Glass Fibers ◽  
Sol Gel ◽  
Dip Coating ◽  
Band Gap Energy ◽  
Fluorescent Light ◽  
Co Doping ◽  
Light Region ◽  
Microstructure Morphology ◽  
Co Doped

The photocatalytic N-S co-doped TiO2films coated on glass fibers were successfully prepared by sol-gel, dip-coating and calcination methods. The effect of doping concentration on crystalline size, microstructure, morphology, optical property and photocatalytic activity was investigated. The films were characterized by XRD, SEM, EDS, UV-vis DRS and FT-IR. The photocatalytic activity was evaluated by the degradation of methylene blue (MB). N-S co-doping has an effect on light adsorption wavelength shifted to visible light region which can lower the band gap energy of N-S co-doped due to the replacement of O atom in TiO2by N and S atoms to form Ti-O-N and Ti-O-S structures. Thiourea, a source of nitrogen and sulfur could increase viscosity of sol used for coating on glass fibers, resulting in larger particles size and more surface roughness of the doped films.TiO2films with 5 mol% N-S co-doped showed an excellent photocatalytic performance under fluorescent light irradiation.

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.

Study of Improvement Technology of Photocatalytic Activity on the TiO2 Sol by Plasma Treatment After Dip-Coating Processing

2003 ◽  
Vol 10 (04) ◽  
pp. 635-640 ◽  
Author(s):  
C.-K. Jung ◽  
S.-H. Cho ◽  
S.-B. Lee ◽  
T.-K. Kim ◽  
M.-N. Lee ◽  
...  
Keyword(s):  
Thin Films ◽  
Photocatalytic Activity ◽  
Plasma Treatment ◽  
Sol Gel ◽  
Catalytic Performance ◽  
Dip Coating ◽  
Rf Plasma ◽  
Tio2 Sol ◽  
Afm Analysis ◽  
Gel Processing

We have deposited titanium dioxide TiO 2 thin films on glass using a single molecular precursor such as titanium (IV) isopropoxide ( Ti [ OCH ( CH 3)2]4, 97%) by sol–gel processing. Argon and oxygen rf plasma treatments at 295 K for 0.5 h in the power range of 50–200 W were also used to elevate photocatalytic activity of the as-grown TiO 2 films. A superhydrophilic property and surface morphology change appeared in the light irradiation with O 2 plasma treatment. In this work, the effect of the plasma with photocatalyst ( TiO 2) on the improvement of hydrophilic properties has mainly been investigated. Photocatalytic activity was evaluated by measurements of the uv/vis. irradiation, refractive index, contact angle, and AFM analysis. We confirmed that plasma treatment is a very reliable method for the synthesis of TiO 2 thin films with high catalytic performance.

Study on fabrication of Sn-doped ZnO thin films oriented to the application for organic dye degradation catalysts in water environment

2021 ◽  
Vol 10 (3) ◽  
pp. xx-xx
Author(s):  
Doanh Vu Viet ◽  
Trang Nguyen Thu ◽  
Kiet Le Minh ◽  
Minh Duong Quoc ◽  
Thong Trinh Quang ◽  
...  
Keyword(s):  
Thin Films ◽  
Photocatalytic Activity ◽  
Dye Degradation ◽  
Sol Gel ◽  
Photocatalytic Property ◽  
Dip Coating ◽  
Solar Irradiation ◽  
Zno Films ◽  
Blue Dye ◽  
Doped Zno

In this study, zinc oxide (ZnO) doped with Sn thin films were deposited on the glass substrate at 550 °C by dip-coating technique using the solution synthesized by sol-gel method. The structural, surface morphology, optical and photocatalytic property of thin films were studied. X-ray diffraction (XRD) analysis showed that the Sn-doping greatly changed the microstructure, morphology and optical properties of ZnO films, which may contribute to the enhancement of photocatalytic activity. Additionally, the photocatalytic activity was investigated using methylene blue  dye under solar irradiation, with has high UV index from 7 to 8. The results indicated that Sn-doped ZnO had a higher photocatalytic activity and Sn dopant greatly increased the photocatalytic activity of ZnO thin film.

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