scholarly journals Microfiltration Membranes Modified with Composition of Titanium Oxide and Silver Oxide by Magnetron Sputtering

Polymers ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 141
Author(s):  
Joanna Kacprzyńska-Gołacka ◽  
Monika Łożyńska ◽  
Wioletta Barszcz ◽  
Sylwia Sowa ◽  
Piotr Wieciński ◽  
...  
Keyword(s):  
Magnetron Sputtering ◽  
Polymer Membranes ◽  
Photocatalytic Properties ◽  
Permeate Flux ◽  
Oxide Coatings ◽  
Total Inhibition ◽  
Two Component ◽  
Coated Membranes ◽  
Result Show ◽  
Microfiltration Membranes

In this work, the authors present the possibility of modification of polymer membranes by TiO2 + AgO coating created by the magnetron sputtering method. The two-component TiO2 + AgO coating can improve and shape new functional properties such as bactericidal and photocatalytic properties. The influence of magnetron power changes on the structure of the membrane was investigated as well. The structure and elemental composition of TiO2 + AgO coatings were analyzed using SEM and EDS technique. All deposited coatings caused a total inhibition of the growth of two investigated colonies of Escherichia coli and Bacillus subtilis on the surface. The photocatalytic properties for membranes covered with oxide coatings were tested under UV irradiation and visible light. The filtration result show that polymer membranes covered with two-component TiO2 + AgO coatings have a permeate flux similar to the non-coated membranes.

scholarly journals Influence of Deposition Parameters of TiO2 + CuO Coating on the Membranes Surface Used in the Filtration Process of Dairy Wastewater on Their Functional Properties

Membranes ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 290
Author(s):  
Joanna Kacprzyńska-Gołacka ◽  
Monika Łożyńska ◽  
Wioletta Barszcz ◽  
Sylwia Sowa ◽  
Piotr Wieciński ◽  
...  
Keyword(s):  
Functional Properties ◽  
Membrane Filtration ◽  
Antibacterial Properties ◽  
Polymer Membranes ◽  
Dairy Wastewater ◽  
Permeate Flux ◽  
Functional Coatings ◽  
Technological Parameters ◽  
Novel Approach ◽  
Two Component

A novel approach of the deposition of two-component coating consisting of TiO2 and CuO on polymer membranes by MS-PVD method was presented in this work. This confirmed the possibility of using thin functional coatings for the modification of polymer membranes. The influence of technological parameters of the coating deposition on the membrane’s structure, chemical composition and functional properties (hydrophilic, photocatalytic and bactericidal properties) were analyzed using SEM. Model microorganism such as Escherichia coli and Bacillus subtilis have been used to check the antibacterial properties. The results indicated that doping with CuO highlights the potential of bactericidal efficiency. The surface properties of the membranes were evaluated with the surface free energy. For evaluating photocatalytic properties, the UV and visible light were used. The filtration tests showed that polymer membranes treated with two-component TiO2 + CuO coatings have a permeate flux similar to the reference material (non-coated membrane). The obtained results constitute a very promising perspective of the potential application of magnetron sputtering for deposition of TiO2 + CuO coatings in the prevention of biofouling resulted from the membrane filtration of dairy wastewater.

Cuprous Oxide Films Deposition by Mid-Frequency Magnetron Sputtering and Their Photocatalytic Activity under Visible Light

NANO ◽  
2021 ◽  
Author(s):  
Z. X. Mu ◽  
H. Li ◽  
X. N. Deng
Keyword(s):  
Photocatalytic Activity ◽  
Magnetron Sputtering ◽  
Visible Light ◽  
Cuprous Oxide ◽  
Deposition Time ◽  
Visible Region ◽  
Mixed Phase ◽  
Photocatalytic Properties ◽  
Oxygen Flow ◽  
Photocatalytic Films

Cuprous oxide (Cu2O) has attracted much attention as a photocatalytic material. In this paper, the mid-frequency reactive magnetron sputtering method was used to prepare Cu2O films on glass slides, and the effects of oxygen flow and deposition time on the structures, morphologies and photocatalytic properties of the films were studied. The results show that the films prepared by this method have smooth surfaces and good absorptivity in the visible region. As the oxygen flow increases, the films transit from the mixed-phase of Cu and Cu2O to the single-phase of Cu2O. When the oxygen flow continues to increase, the films change to a mixed-phase of Cu4O3 and Cu2O. The photocatalytic decolorization of methyl orange under visible light irradiation conditions was used to assess the photocatalytic properties of the prepared films. When the oxygen flow is 6[Formula: see text]sccm and the deposition time is 15[Formula: see text]min, the film exhibits the best photocatalytic activity. Finally, the Mulliken electronegativity theory was used to explain the photocatalytic mechanism of Cu2O. This study confirmed the feasibility of preparing Cu2O photocatalytic films by magnetron sputtering, and provided the experimental basis for the subsequent study of Cu2O photocatalytic films.

Photo activated performance of titanium oxide coatings deposited by reactive gas impulse magnetron sputtering

2018 ◽  
Vol 349 ◽  
pp. 647-654 ◽  
Author(s):  
W. Pawlak ◽  
M. Jakubowska ◽  
A. Sobczyk-Guzenda ◽  
M. Makówka ◽  
H. Szymanowski ◽  
...  
Keyword(s):  
Magnetron Sputtering ◽  
Titanium Oxide ◽  
Oxide Coatings ◽  
Reactive Gas

Photocatalytic properties of TiO 2 films prepared by bipolar pulsed magnetron sputtering

2017 ◽  
Vol 320 ◽  
pp. 630-634 ◽  
Author(s):  
Yu-Xiang Zhao ◽  
Sheng Han ◽  
Han Lin Yi ◽  
Chung-Hsuan Hu ◽  
Li-Yu Hua ◽  
...  
Keyword(s):  
Magnetron Sputtering ◽  
Photocatalytic Properties ◽  
Pulsed Magnetron

Evaluation of cell activation promoted by tantalum and tantalum oxide coatings deposited by reactive DC magnetron sputtering

2017 ◽  
Vol 330 ◽  
pp. 260-269 ◽  
Author(s):  
Hugo Moreira ◽  
Augusto Costa-Barbosa ◽  
Sandra Mariana Marques ◽  
Paula Sampaio ◽  
Sandra Carvalho
Keyword(s):  
Magnetron Sputtering ◽  
Cell Activation ◽  
Tantalum Oxide ◽  
Oxide Coatings ◽  
Dc Magnetron Sputtering

Effect of SnO2 Modification on Permeate Flux of Α-Al2O3 Microfiltration Membrane for Treating Fe(OH)2 Suspensions

2011 ◽  
Vol 189-193 ◽  
pp. 489-493 ◽  
Author(s):  
Xue Bing Hu ◽  
Jian Er Zhou ◽  
Yan Xiang Wang ◽  
Yong Qing Wang ◽  
Xiao Zheng Zhang ◽  
...  
Keyword(s):  
Ceramic Membrane ◽  
Pure Water ◽  
Synthesis Method ◽  
In Situ Synthesis ◽  
Permeate Flux ◽  
Microfiltration Membrane ◽  
Microfiltration Membranes ◽  
Flux Increase ◽  
Nano Grains

To improve the permeate flux of ceramic membrane, commercial α-Al2O3 microfiltration membrane of 0.2 μm pore diameter was modified with SnO2 nano grains by in situ synthesis method. The permeate fluxes of the membrane for pure water and treating Fe(OH)2 suspensions were studied mainly in the paper. The results showed that the pure water stable permeate fluxes of unmodified and SnO2 modified microfiltration membranes were 0.61 m3h-1m-2 and 1.87 m3h-1m-2, respectively. When treating 1L 0.01 mol∙L-1 Fe(OH)2 suspensions, the permeate fluxes of SnO2 modified membrane was higher than that of unmodified membrane all the time and the clarified permeate was obtained. The results indicated that in situ synthesis method can be successfully used to modify α-Al2O3 microfiltration membrane with SnO2 nano grains for permeate flux increase, and the microfiltration membrane has excellent treatment effect on Fe(OH)2 suspensions. Furthermore, the enhancement mechanism of permeate flux of SnO2 modification microfiltration membrane was discussed initially.

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