scholarly journals Self-cleaning durability assessment of TiO2/SiO2 photocatalysts coated concrete: Effect of indoor and outdoor conditions on the photocatalytic activity

2022 ◽  
pp. 108743
Author(s):  
Souad Khannyra ◽  
Manuel Luna ◽  
M.L. Almoraima Gil ◽  
Mohammed Addou ◽  
Maria J. Mosquera
Keyword(s):  
Photocatalytic Activity ◽  
Durability Assessment ◽  
Self Cleaning ◽  
Indoor And Outdoor

scholarly journals Thermally stable SiO2@TiO2 core@shell nanoparticles for application in photocatalytic self-cleaning ceramic tiles

2021 ◽  
Author(s):  
Elias Paiva Ferreira Neto ◽  
Sajjad Ullah ◽  
Vitor P Martinez ◽  
Jean M.S.C Yabarrena ◽  
Mateus Batista Simões ◽  
...  
Keyword(s):  
Core Shell ◽  
Thermally Stable ◽  
Ceramic Tiles ◽  
High Demand ◽  
Shell Nanoparticles ◽  
Industrial Processing ◽  
Clean Environment ◽  
Self Cleaning ◽  
Core Shell Nanoparticles ◽  
Indoor And Outdoor

Photocatalyst-coated self-cleaning ceramic tiles are in high demand for indoor and outdoor applications aimed at keeping a clean environment. Their industrial processing, however, often re-quires firing at temperature (1000–1200 °C)...

Simple method for the rapid simultaneous screening of photocatalytic activity over multiple positions of self-cleaning films

2009 ◽  
Vol 11 (37) ◽  
pp. 8367 ◽  
Author(s):  
Andreas Kafizas ◽  
Davy Adriaens ◽  
Andrew Mills ◽  
Ivan P. Parkin
Keyword(s):  
Photocatalytic Activity ◽  
Simple Method ◽  
Self Cleaning

scholarly journals Systems developed for application as self-cleaning surfaces and/or antimicrobial properties: a short review on materials and production methods

Cerâmica ◽  
2019 ◽  
Vol 65 (375) ◽  
pp. 477-484 ◽  
Author(s):  
M. P. Madeira ◽  
A. O. Lobo ◽  
B. C. Viana ◽  
E. C. Silva Filho ◽  
J. A. Osajima
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Photocatalytic Activity ◽  
Medical Devices ◽  
Spin Coating ◽  
Antimicrobial Properties ◽  
Short Review ◽  
Dip Coating ◽  
Production Methods ◽  
Self Cleaning

Abstract Herein we present a short review of different materials and techniques that have been used for the production of surfaces with self-cleaning and/or antimicrobial properties. From this, it was verified that titanium dioxide was the most frequently used compound to obtain surfaces with these properties; however, other materials such as silica, zinc and silver have also been used for this purpose. The spin-coating and dip-coating techniques were the most used techniques, and the bacteria Staphylococcus aureus and Escherichia coli were the most used in the antimicrobial assays. The analyzed studies showed that it is possible to obtain surfaces with both self-cleaning and/or antimicrobial properties, as well as with photocatalytic activity. Regarding possible applications, it is possible to highlight the interest in the production of glass and medical devices with self-cleaning and/or antimicrobial action.

Preparation of self-cleaning surfaces with a dual functionality of superhydrophobicity and photocatalytic activity

2014 ◽  
Vol 319 ◽  
pp. 367-371 ◽  
Author(s):  
Eun Ji Park ◽  
Hye Soo Yoon ◽  
Dae Han Kim ◽  
Yong Ho Kim ◽  
Young Dok Kim
Keyword(s):  
Photocatalytic Activity ◽  
Self Cleaning

scholarly journals Superhydrophobic and photocatalytic self-cleaning on cotton fabric using fluorine-free flower-like-TiO2/PDMS coatings

2021 ◽  
Author(s):  
Esfandiar Pakdel ◽  
Hai Zhao ◽  
Jinfeng Wang ◽  
Bin Tang ◽  
Russell Varley ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Cotton Fabric ◽  
Nitrogen Doping ◽  
Dip Coating ◽  
Polydimethyl Siloxane ◽  
Water Contact ◽  
Highly Efficient ◽  
Coating Method ◽  
Self Cleaning ◽  
The Impact

Abstract This research presents the development of novel self-cleaning cotton fabric with dual functionalities of superhydrophobicity and photocatalytic activity. Fluorine-free coating formulations composed of either flower-like TiO2 or nitrogen-doped TiO2 particles, with a hierarchical surface morphology, and polydimethyl siloxane (PDMS) polymer were applied to cotton fabrics using a facile dip-coating method. The self-cleaning performance of fabrics was assessed based on their superhydrophobicity and effective removal of oil-based food stains. Additionally, the impact of nitrogen doping on photocatalytic activity of flower-like TiO2 particles was investigated. The obtained results demonstrated that the presence of both PDMS and hierarchical particles generated excellent superhydrophobicity on the cotton fabric with a water contact angle of 156.7 ± 1.9⁰. In addition, the coated fabric exhibited highly efficient photocatalytic activity, decomposing stains under simulated sunlight. Nitrogen doping process significantly boosted the photocatalytic activity of TiO2 particles in degrading stains and dye solution. The developed superhydrophobic fabric showed high robustness against both chemical and physical durability tests. This research contributes significantly to the continued advancement of highly efficient self-cleaning textiles via the development of dual functions of superhydrophobicity and photocatalytic activity.

scholarly journals PHOTOCATALYTIC ACTIVE SELF-CLEANING CEMENT-BASED MATERIALS. COMPOSITIONS, PROPERTIES, APPLICATION

2020 ◽  
pp. 16-25
Author(s):  
M. Antonenko ◽  
Yu. Ogurtsova ◽  
V. Strokova ◽  
E. Gubareva
Keyword(s):  
Photocatalytic Activity ◽  
Diffusion Processes ◽  
Photocatalytic Reaction ◽  
Active Materials ◽  
Concrete Mixtures ◽  
Developed Surface ◽  
Cement Based Materials ◽  
Cement System ◽  
Self Cleaning ◽  
Prospects Of Application

The paper reviews the available technologies for producing photocatalytic active self-cleaning materials based on cement, including concretes and dry building mixtures. Used photocatalytic additives and their influence on the cement system are considered. The applied methods for assessing the photocatalytic activity of self-cleaning cement materials are presented. The compositions of concrete mixtures, their properties, areas and prospects of application are analyzed. The main problems of development, production and application of photocatalytic active self-cleaning materials based on cement are presented. The main directions to increase the self-cleaning ability of photocatalytic active materials based on cement are: optimization of the microstructure of the photocatalyst and the composite with its use in the direction of creating a developed surface of the photocatalyst - hierarchical microstructure; it intensifies the diffusion processes of photocatalytic reaction reagents and increases the contact area photocatalyst with a pollutant; it absorbs and accumulates ultraviolet radiation waves; optimization of the phase composition of titanium dioxide - search for the ratio of the anatase and rutile phases, at which the maximum photocatalytic activity is achieved; choosing of economically feasible method for periodical updating of the surface of concrete products carbonized during operation in order to restore self-cleaning ability.

scholarly journals Development of Photocatalytic Ceramic Materials through the Deposition of TiO2 Nanoparticles Layers

2012 ◽  
Vol 18-19 ◽  
pp. 165-176 ◽  
Author(s):  
J.O. Carneiro ◽  
V. Teixeira ◽  
S. Azevedo ◽  
F. Fernandes ◽  
J. Neves
Keyword(s):  
Photocatalytic Activity ◽  
Uv Light ◽  
Porous Ceramic ◽  
Sol Gel ◽  
Research Work ◽  
Construction Materials ◽  
Dip Coating ◽  
Human Beings ◽  
Ceramic Surfaces ◽  
Self Cleaning

Urbanism and communities centralization enlarges atmospheric pollution that affects both human beings as well as their constructed buildings. Different scientific and technological studies are being conducted, both in academic and construction industry, aiming the development of new construction materials with properties that can decrease visual pollution of cities, reducing also the number of cleanings required. The present research work aims the study and the production of self-cleaning ceramic surfaces in an economical and viable way without changing aesthetical aspect of material substrates used. The use of TiO2 nanoparticles (TiO2-NNPs) represents an attractive way to generate self-cleaning surfaces, therefore promoting the degradation of pollutant agents and reducing cleaning maintenance costs. In order to impart self-cleaning properties to ceramic surfaces, TiO2-NNPs based layers were deposited on different ceramic material substrates using the dip-coating method. The Photocatalytic activity (degradation of pollutants adsorbed on the surface) of the TiO2-NNPs based layers was characterized via the decomposition rate of an aqueous solution of Methylene blue (MB) under UV light irradiation. Colourless layers were successfully produced onto gray and white ceramic substrates using this sol-gel technique, without changing their aesthetical appearance. It was observed that the best photocatalytic activity was exhibited by the most porous ceramic substrate (gray); nevertheless, all the TiO2-NNPs coated ceramic surfaces showed good photocatalytic efficiency.

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.

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