Transition metals Fe3+, Ni2+ modified titanium dioxide (TiO2) film sensors Fabricated by CPT method to sense some toxic environmental pollutant gases

2021 ◽  
pp. 100126
Author(s):  
Ravindra Haribhau Waghchaure ◽  
Prashant Bhimrao Koli ◽  
Vishnu Ashok Adole ◽  
Thansing Bhavsing Pawar ◽  
Bapu Sonu Jagdale
Keyword(s):  
Titanium Dioxide ◽  
Transition Metals ◽  
Tio2 Film ◽  
Environmental Pollutant ◽  
Pollutant Gases

Selective Deposition of Titanium Dioxide Thin Film on Glass Monolayers by Impregnating Method

2009 ◽  
Vol 610-613 ◽  
pp. 147-154
Author(s):  
Yao Bo Hu ◽  
Fu Sheng Pan ◽  
Jing Feng Wang
Keyword(s):  
Thin Film ◽  
Titanium Dioxide ◽  
Tio2 Film ◽  
Tio2 Thin Film ◽  
Monolayer Film ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Dual Beam ◽  
Assembled Monolayers ◽  
Tio2 Gel

Titanium dioxide (TiO2) thin film was fabricated on the surface of glass monolayers at room temperature, using KH-550 as self-assembled monolayers (SAMs). The TiO2 gel precursor was characterized with differential scanning calorimetry – thermogravimetry (DSC-TG), and the TiO2 powder was analyzed with X-ray diffraction (XRD). The TiO2 thin film was tested with X-ray fluorescence spectroscopy (XRF). With the application of atomic force microscope (AFM) the surface topography of siloxane layer and TiO2 film were studied. Their hydrophilicities were measured. The transmittance of TiO2 film was detected by using dual beam ultraviolet - visible spectrophotometer. The results show that the TiO2 thin film is in monolayer with nanometer level, the deposition is the anatase structure. TiO2 is deposited on the surface instead of channel or gap of siloxane, the hydrophilicities of TiO2 monolayer film are perfect, and TiO2 monolayer film has a good transmissivity in the visible light area.

scholarly journals Enhanced Photocatalytic Degradation of Caffeine Using Titanium Dioxide Photocatalyst Immobilized on Circular Glass Sheets under Ultraviolet C Irradiation

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 964
Author(s):  
Rattana Muangmora ◽  
Patiya Kemacheevakul ◽  
Patiparn Punyapalakul ◽  
Surawut Chuangchote
Keyword(s):  
Titanium Dioxide ◽  
Photocatalytic Degradation ◽  
Tio2 Film ◽  
Irradiation Time ◽  
Anatase Phase ◽  
Treated Wastewater ◽  
Synthetic Wastewater ◽  
Coated Glass ◽  
Caffeine Degradation ◽  
Ultraviolet C

This work presents the development of titanium dioxide (TiO2) film immobilized on circular glass sheets for photocatalytic degradation of caffeine under ultraviolet C (UVC) irradiation. TiO2 was synthesized through the ultrasonic-assisted sol–gel method and immobilized on circular glass sheets by the doctor blade technique. Polyvinylpyrrolidone (PVP) was used to mix with the TiO2 precursor solution to enhance film adhesion on the glass surface. TiO2 film was mainly composed of anatase phase with a small amount of rutile phase. Caffeine removal was found to increase with increasing irradiation time. Caffeine (20 mg/L) in the synthetic wastewater could not be detected after 3 h of UVC irradiation. The reaction rate of caffeine degradation followed the pseudo-first-order model. The concentrated caffeine solutions required a longer irradiation time for degradation. The used TiO2-coated glass sheets could be easily separated from the treated wastewater and reusable. The caffeine removal efficiency of TiO2-coated glass sheets in each cycle maintained a high level (~100%) during fifteen consecutive cycles.

scholarly journals Impact of Size Distribution of Nanoparticles in TiO2 Paste for its Application in Dye Sensitized Solar Cells

2013 ◽  
Vol 4 ◽  
pp. 27-31 ◽  
Author(s):  
Suresh Kumar Dhungel ◽  
Chang Woo Park
Keyword(s):  
Titanium Dioxide ◽  
Solar Cells ◽  
Comparative Study ◽  
Tio2 Film ◽  
Dye Sensitized Solar Cells ◽  
Tio2 Films ◽  
Dye Sensitized ◽  
Improved Performance ◽  
Sensitized Solar Cells ◽  
Proper Balance

Titanium dioxide (TiO2) nanoparticles have been recognized as a significant candidate for Dye SensitizedSolar Cell (DSSC) applications. A comparative study of the TiO2 films with two different patterns of the nanoparticlessize distribution is reported in this article. Crystallinity of the nanoparticles, distribution of size of nanoparticles and theperformance parameters of the DSSCs fabricated out of the films were thoroughly analyzed for the films of both types of TiO2.The TiO2 film with its nanoparticles distributed over a wider range showed better interconnection between the nanoparticlesand hence less porosity that resulted in lower area available for the adsorption of dye after sintering whereas the TiO2 filmwith its nanoparticles distributed over a narrower range showed relatively poor interconnection between the nanoparticlesleading to enhanced porosity suitable for DSSC application. A proper balance between porosity of the TiO2 film and theinterconnection between the nanoparticles can ensure the DSSC with improved performance parameters.The Himalayan Physics Vol. 4, No. 4, 2013 Page: 27-31 Uploaded date: 12/23/2013 

Photocatalytic Activity of Fe/Ti Mixed Oxide for Degrading Humic Acid in Water

2013 ◽  
Vol 717 ◽  
pp. 95-100 ◽  
Author(s):  
I.H. Kim ◽  
W.S. Kim ◽  
D.S. Rhee
Keyword(s):  
Titanium Dioxide ◽  
Iron Oxide ◽  
Humic Acid ◽  
Mixed Oxide ◽  
Photocatalytic Oxidation ◽  
Mixed Oxides ◽  
Environmental Pollutant ◽  
Oxide Surface ◽  
Active Components ◽  
Coated Granules

The comparative experiments for removing humic acid as environmental pollutant were conducted by adsorption on iron oxide, photooxidation in the presence of titanium dioxide catalyst and combined adsorption-photooxidation by iron-titanium mixed metal oxides, where all these active components were immobilized on polypropylene granules. The main purpose of the work was the combination of adsorption and photocatalytic oxidation processes to remove humic acid. The granules with iron-titanium mixed oxide for treating humic acid gave much better results with 1.2~3 times higher removal rates comparing to the other two single coated oxides at certain pH values. And the order of removal efficiency according to pH was the same as for single iron oxide-coated granules. The ratio 1:2 of iron oxide/titanium dioxide was found optimal for maximal decolorization of humic acid solution. The total organic carbon decrease of humic acid in each experiments, when it was pre-equilibrated with mixed oxides-coated granules in the dark for 30 min and without pre-equilibration, was very similar. The results suggested that the mechanism of humic acid removal may be not only a respectively combined adsorption and photooxidation by iron oxide and titanium oxides, but an enhanced photooxidation reaction as a result of concentrating humic acid on titanium oxide surface by iron oxide.

Titanium dioxide doped with transition metals (M x Ti1−x O2, M: Ni, Co): synthesis and characterization for its potential application as photoanode

2011 ◽  
Vol 13 (8) ◽  
pp. 3313-3325 ◽  
Author(s):  
K. Esquivel ◽  
Ma. G. García J. ◽  
F. J. Rodríguez ◽  
M. Vega González ◽  
L. Escobar-Alarcón ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Transition Metals ◽  
Potential Application ◽  
Synthesis And Characterization

Fabrication and Super-Hydrophobicity of TiO2 Nanostructure with Urchin Shapes

2010 ◽  
Vol 8 (1) ◽  
Author(s):  
Qunbing Zhang ◽  
Jun Wang
Keyword(s):  
Contact Angle ◽  
Titanium Dioxide ◽  
Tio2 Film ◽  
Rutile Phase ◽  
X Ray Diffraction ◽  
Hydrophobic Property ◽  
X Ray ◽  
Diffraction Peaks ◽  
20 Nm ◽  
Tio2 Nanostructure

Titanium dioxide (TiO2) film with urchin-like nanostructures has been successfully fabricated without invoking any catalyst or template on silicon substrate. The morphological features characterized by FE-SEM showed that TiO2 film consisted of numerous sharply tipped micro-daggers with lengths of several micrometers and diameters of about 20 nm. X-ray diffraction pattern (XRD) shows that all diffraction peaks can be indexed to the rutile phase of TiO2. The water repelling characteristics of the film were measured by Contact Angle Meter as well as snapshots taken from a Hitachi camera. This measurement shows the water has a contact angle (CA) of about 151.2°. The above measurements indicate that the TiO2 film has super-hydrophobic property.

scholarly journals Surface modified titanium dioxide using transition metals: nickel as a winning transition metal for solar light photocatalysis

2018 ◽  
Vol 6 (21) ◽  
pp. 9882-9892 ◽  
Author(s):  
Andraž Šuligoj ◽  
Iztok Arčon ◽  
Matjaž Mazaj ◽  
Goran Dražić ◽  
Denis Arčon ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Transition Metal ◽  
Transition Metals ◽  
Redox Potential ◽  
Solar Light ◽  
Reduction Reactions ◽  
Light Activity ◽  
Surface Modified ◽  
Positive Effect ◽  
Supported Metal

Ni and Zn show a winning combination of redox potential and band positions of TiO2 supported metal-oxo-nanoclusters for enhanced solar-light activity. However, Ni is the only metal which has a positive effect on solar photoactivity in both oxidation and reduction reactions.

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