scholarly journals Surface-morphology modification of ceramic-based composites for photocatalytic activity via simple chemical and heat treatments

2018 ◽  
Vol 126 (11) ◽  
pp. 877-884 ◽  
Author(s):  
Shengfang SHI ◽  
Tomoyo GOTO ◽  
Sung Hun CHO ◽  
Tohru SEKINO
Keyword(s):  
Photocatalytic Activity ◽  
Surface Morphology ◽  
Heat Treatments ◽  
Simple Chemical ◽  
Morphology Modification ◽  
Surface Morphology Modification

ZnxCd1-xS/g-C3N4 nanocomposites: synthesis, characterization, and photocatalytic activity

2020 ◽  
Vol 98 (8) ◽  
pp. 441-444
Author(s):  
Xiaoyue Li ◽  
Limin Dong ◽  
Lianwei Shan ◽  
Xinxin Jin ◽  
Yingkui Guo
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Composite Materials ◽  
Synergistic Effect ◽  
Light Absorption ◽  
Catalytic Effect ◽  
Chemical Precipitation ◽  
Precipitation Method ◽  
Visible Light Absorption ◽  
Simple Chemical

In this work, we prepared ZnxCd1-xS/g-C3N4 nanocomposites with excellent catalytic effect by the simple chemical precipitation method. The ZnxCd1-xS/g-C3N4 composite with excellent effect of degrading methylene blue (MB) was prepared by adjusting the ratio of Zn to Cd. The Zn0.25Cd0.75S/g-C3N4 nanocomposites have the highest degradation efficiency, which can reach 92.25%. The specific surface area and visible light absorption range are increased by the synergistic effect of the combination of ZnxCd1-xS and g-C3N4. The ZnxCd1-xS/g-C3N4 nanocomposites prepared by this study with excellent photocatalytic properties provide a method for the preparation of new composite materials in the future.

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 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.

Surface Morphology Investigation of Au and Pt Electroless Contact on ZnCdTe Crystal by Atomic Force Microscopy

1995 ◽  
Vol 378 ◽  
Author(s):  
Zhiyu Hu ◽  
Zhihua Hu ◽  
K. T. Chen ◽  
M. A. George ◽  
A. Burger ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Grain Size ◽  
Surface Morphology ◽  
Aqueous Solutions ◽  
Single Crystals ◽  
Platinum Metal ◽  
Heat Treatments ◽  
Metal Contacts ◽  
Force Microscopy ◽  
Atomic Force

AbstractGold and platinum metal contacts have been deposited on the cleaved and etched surfaces of ZnCdTe single crystals by “electroless” method from AuCl3, PtCl2 and PtCl4 aqueous solutions with different concentrations and deposition times. Atomic Force Microscopy (AFM) has been employed to reveal the surface morphology of metal contacts and it was found that for AuCl3 and PtCl2 solutions, the surface morphology and grain size are similar, and uniformly distributed. The surface morphology on contact made from PtCl4 shows a larger grain size, higher roughness and non-uniformity. The effect of different heat treatments to the surface morphology will be discussed.

Surface Morphology and Corrosion Behavior of Electrolytic Coatings in Different Aqueous Solutions

2013 ◽  
Vol 594-595 ◽  
pp. 585-589
Author(s):  
Siti Hawa Mohamed Salleh ◽  
Mohd Nazree Derman ◽  
Mohd Zaidi Omar ◽  
Rohaya Abdul Malek
Keyword(s):  
Mechanical Properties ◽  
Surface Morphology ◽  
Aqueous Solutions ◽  
Corrosion Behavior ◽  
Stainless Steels ◽  
Surface Modifications ◽  
Heat Treatments ◽  
Martensitic Stainless Steels ◽  
Corrosion Rates ◽  
Corrosive Environments

SS440C steels show potential as highest mechanical properties compared to others martensitic stainless steels. As their properties can be altered by some particular heat treatments, this steel is suitable for a extensive ranges of applications such as bearings, gage blocks, races, valve parts and many other manufacturing important components. Unfortunately, bare SS440C substrates corrode too quickly under corrosive environments. Surface modifications that are able to reduce corrosion rates to suitable levels will allow SS440C to become a reality for much more applications [1-.

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