Influence of sulfuric-acid-bath pretreatment and soaked in sulfuric acid on surface morphology and photocatalytic activity of titania coatings

2020 ◽  
Vol 63 (12) ◽  
pp. 2657-2663
Author(s):  
SuJun Guan ◽  
Liang Hao ◽  
Shota Kasuga ◽  
Hiroyuki Yoshida ◽  
YanLing Cheng ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Sulfuric Acid ◽  
Surface Morphology ◽  
Acid Bath ◽  
Titania Coatings

Enhanced photocatalytic activity of titania coatings fabricated at relatively low oxidation temperature with sulfate-acid-bath pretreatment

2020 ◽  
Vol 126 (7) ◽  
Author(s):  
Sujun Guan ◽  
Liang Hao ◽  
Shota Kasuga ◽  
Hiroyuki Yoshida ◽  
Yanling Cheng ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Oxidation Temperature ◽  
Acid Bath ◽  
Titania Coatings

Wet Chemical Etching of Zn-containing oxides and HfO2 for the fabrication of Transparent TFTs

2009 ◽  
Vol 1201 ◽  
Author(s):  
Jae-Kwan Kim ◽  
Jun Young Kim ◽  
Seung-Cheol Han ◽  
Joon Seop Kwak ◽  
Ji-Myon Lee
Keyword(s):  
Sulfuric Acid ◽  
Surface Morphology ◽  
Chemical Etching ◽  
Etch Rate ◽  
Room Temperature ◽  
Wet Chemical ◽  
Wet Chemical Etching

AbstractThe etch rate and surface morphology of Zn-containing oxide and HfO2 films after wet chemical etching were investigated. ZnO could be easily etched using each acid tested in this study, specifically sulfuric, formic, oxalic, and HF acids. The etch rate of IGZO was strongly dependent on the etchant used, and the highest measured etch rate (500 nm/min) was achieved using buffered oxide etchant at room temperature. The etch rate of IGZO was drastically increased when sulfuric acid at concentration greater than 1.5 molar was used. Furthermore, etching of HfO2 films by BF acid proceeded through lateral widening and merging of the initial irregular pits.

scholarly journals Structural Formation and Photocatalytic Activity of Magnetron Sputtered Titania and Doped-Titania Coatings

Molecules ◽  
2014 ◽  
Vol 19 (10) ◽  
pp. 16327-16348 ◽  
Author(s):  
Peter Kelly ◽  
Glen West ◽  
Marina Ratova ◽  
Leanne Fisher ◽  
Soheyla Ostovarpour ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Structural Formation ◽  
Doped Titania ◽  
Titania Coatings

Study of Ni-V load acid-modified calcined kaolin

2015 ◽  
Vol 15 (2) ◽  
pp. 138-142 ◽  
Author(s):  
N Lkhagvajav ◽  
Q Zhang ◽  
Ts Tsedendorj
Keyword(s):  
Photocatalytic Activity ◽  
Sulfuric Acid ◽  
Photocatalytic Reaction ◽  
Natural Clay ◽  
Temperature Ratio ◽  
Photo Catalyst ◽  
Ft Ir ◽  
Low Costs ◽  
Calcined Kaolin ◽  
Effective Carrier

Kaolin as a natural clay mineral, is commercially available at low costs, which is of great importance. It has been demonstrated by existing research kaolin is a very effective carrier for photo catalyst, being able to promote the photocatalytic reaction process as well as improve the efficiency of reaction. The catalysts was characterized by FT-IR, XRD, UV-Vis spectra methods. Ni and V, amount of catalyst investigate. Simultaneously the effects of photocatalytic reaction activity about concentration of sulfuric acid, calcination temperature, ratio of Ni and V, amount of catalyst investigate. The experimental results show that the photocatalytic activity of calcined kaolin which is treated by 40% and loading Ni and V is significantly higher than other kaolin. The kaolin does not have the B acid and L acid peaks, but people could see the B acid and L acid peaks on the kaolin which is roasted and treated by sulfuric acid. In a certain range, the activity of the catalysts increase with the increasing of the concentration of acid.Journal of agricultural sciences №15 (02): 138-142, 2015

Influence of carbon atmosphere on surface morphology and photocatalytic activity of TiO2 coatings by multi-heat treatment

2015 ◽  
Vol 27 (4) ◽  
pp. 3873-3879 ◽  
Author(s):  
Sujun Guan ◽  
Liang Hao ◽  
Hiroyuki Yoshida ◽  
Hiroshi Asanuma ◽  
Fusheng Pan ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Photocatalytic Activity ◽  
Surface Morphology ◽  
Tio2 Coatings

scholarly journals Tunable superoleophobicity via harnessing the surface chemistry of UV responsive titania coatings

RSC Advances ◽  
2018 ◽  
Vol 8 (24) ◽  
pp. 13253-13258 ◽  
Author(s):  
Jitesh Barman ◽  
Sumit Kumar Majumder ◽  
Pritam Kumar Roy ◽  
Krishnacharya Khare
Keyword(s):  
Photocatalytic Activity ◽  
Surface Chemistry ◽  
Titania Nanoparticles ◽  
Titania Coatings

Superoleophobic surface with tunable oil wettability is presented by controlling the surface chemistry via exploiting the photocatalytic activity of the titania nanoparticles under UV and regrafting of the same surface.

scholarly journals Deposisi ZnO Doping Ag pada Substrat Alumunium Foil untuk Degradasi Methylene Blue

2020 ◽  
Vol 8 (1) ◽  
pp. 51-60
Author(s):  
Sheilla Rully Anggita ◽  
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Surface Morphology ◽  
Surface Area ◽  
Deposition Temperature ◽  
Sol Gel ◽  
Spray Coating ◽  
Aluminum Foil ◽  
Morphology Characterization ◽  
Foil Substrate

This research has successfully deposited ZnO: Ag on aluminum foil substrates with variations in deposition temperature. The purpose of this study was to obtain the surface morphology of ZnO:Ag on aluminum foil substrates with variations in deposition temperature and obtain optimization of the photocatalytic activity of ZnO: Ag in degrading Methylene Blue dyes. ZnO:Ag deposition on the aluminum foil substrate was carried out by the sol-gel method and spray coating deposition technique. Surface morphology characterization and photocatalytic activity with SEM and with UV-Vis. The surface morphology results obtained from ZnO:Ag on aluminum foil substrate with deposition temperatures of 250 ℃, 300 ℃, 350 ℃, and 400 ℃ are the forms of ganglia with indications as ZnO and Ag grains attached to ZnO. Obtained surface area and roughness level ZnO:Ag decreases with an increase in temperature from 250 ℃ - 300 ℃, and surface area and roughness increases at 350 ℃ -400 ℃. The highest level of roughness is found in the ZnO layer: Ag temperature 400 ℃. The most optimum photocatalytic activity is indicated by the largest percentage of degradation. The highest percentage of degradation is shown by the ZnO: Ag layer with a temperature of 350 ℃ of 87.33%. This is due to the modification of silver at low temperatures which is <400 ℃ effective for photocatalytic activity.

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