Titania (TiO2) as Antibacterial Material in Ceramic Tiles: Effect of Composition

2016 ◽  
Vol 840 ◽  
pp. 14-18 ◽  
Author(s):  
Hasmaliza Mohamad ◽  
Foo Hui Shian ◽  
Ahmad Kamil Fakhruddin Mokhtar
Keyword(s):  
Manufacturing Industry ◽  
Anatase Phase ◽  
Antibacterial Properties ◽  
Dip Coating ◽  
X Ray Diffraction ◽  
Ceramic Tiles ◽  
Antibacterial Material ◽  
Porcelain Tiles ◽  
Glazed Porcelain ◽  
Porcelain Tile

Titania (TiO2) is one of a common and favorable material use in the manufacturing industry due to its uniqueness and functional performances to human and environment. The study was focused on the performance of glaze added TiO2 (anatase phase) in the application of porcelain tiles. Anatase powder in micro size was used (varies at 5 wt%, 10 wt % and 15 wt%) to observe their performance as antibacterial materials. The anatase powders were mix into the glaze composition and apply to the porcelain tile through dip coating. The viscosity of each composition was observed to study their effect. Characterization used to observe the properties of anatase mixed glazed porcelain tile were X-ray diffraction (XRD), Scanning electron microscopy (SEM) and antibacterial test. The results shown that higher composition of anatase powder, viscosity of the mixed glaze is higher and a rougher surface of glazed tiles was formed. XRD result shows that the higher the composition is more the intensity of TiO2 on the glaze coating surface, supported by SEM results. Antibacterial testing towards E.Coli was observed by counting the colonies of bacterial growth in 0 hr, 2 hrs, 4 hrs and 8hrs. The antibacterial properties increase when the composition of anatase increases.

scholarly journals Bulky Macroporous TiO2Photocatalyst with Cellular Structure via Facile Wood-Template Method

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Qingfeng Sun ◽  
Yun Lu ◽  
Jinchun Tu ◽  
Dongjiang Yang ◽  
Jun Cao ◽  
...  
Keyword(s):  
Cellular Structure ◽  
Anatase Phase ◽  
Dip Coating ◽  
X Ray Diffraction ◽  
Photocatalytic Ability ◽  
Xrd Pattern ◽  
X Ray ◽  
Sem Image ◽  
Transmission Electron ◽  
Wood Template

We report a bulky macroporous TiO2particles with cellular structure prepared in the presence of wood slices as template. Firstly, TiO2sol was coated onto the wood slices by repeated dip-coating process. Then, after calcinations at 550°C, the wood template could be removed, and the bulky TiO2structure was obtained. The prepared samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive spectroscopy (EDS), and transmission electron microscope (TEM) techniques. XRD pattern confirmed the crystalline phase of the wood-templated TiO2is anatase phase. And interestingly, from the observation of SEM image, the wood-templated TiO2inherited the initial cellular structures of birch lumber (B. albosinensis Burk), and numerous macropores were observed in the sample. Meanwhile, the wood-templated TiO2presented a superior photocatalytic ability to decompose Rhodamine B (RhB) under ultraviolet irradiation.

Characterization of TiO2 Coating Deposited on Ceramic Substrate

2017 ◽  
Vol 264 ◽  
pp. 38-41
Author(s):  
Muharniza Azinita Musa ◽  
Jariah Mohamad Juoi ◽  
Zulkifli Mohd Rosli ◽  
Nur Dalilah Johari
Keyword(s):  
High Surface ◽  
Sol Gel ◽  
Antimicrobial Properties ◽  
Dip Coating ◽  
X Ray Diffraction ◽  
Ceramic Tiles ◽  
Ceramic Substrates ◽  
Heat Treated ◽  
Glancing Angle

The deposition of titanium dioxide, TiO2, films on ceramic tiles was studied in order to take benefit of its antimicrobial properties for suitable application in related fields. In this paper, the characteristics of TiO2 coating deposited on unglazed ceramic substrates with high surface roughness were investigated. TiO2 films were deposited several times via dip coating sol-gel technique and heat treated at 500oC for 1 hour. The coating morphologies and thickness were analyzed using Scanning electron microscope (SEM), while the crystalline phases were characterized using Glancing angle X-ray Diffraction (GAXRD). Results show that it produces coating with homogeneous morphology, thicker film and with the presence of anatase and rutile phases. It was also observed that one dipping time is sufficient to produce a continuous coating with thickness of ~ 12 μm on average.

Evaluation of Microstructural Phenomena in the Utilization of Porcelain Tile’s Shards to Obtain New Ceramic Materials

2018 ◽  
Vol 930 ◽  
pp. 546-551
Author(s):  
Everton M. Gripa ◽  
I.L.M. Gonçalves ◽  
Valeria Almeida
Keyword(s):  
Natural Resources ◽  
High Technology ◽  
Ceramic Materials ◽  
New Materials ◽  
X Ray Diffraction ◽  
Scanning Electronic Microscopy ◽  
Electronic Microscopy ◽  
Ceramic Tiles ◽  
X Ray ◽  
Porcelain Tiles

The industry of ceramic tiles exploits large amounts of natural resources and produces a lot of solid waste, especially porcelain tiles, a product of this industry that involves high technology fabrication. A previous study showed that, if the calcination conditions are respected (1200°C for 2 hours), it is possible to produce new ceramic tiles from the shards of porcelain tiles generated during construction or demolition. This study uses techniques such as X-Ray Fluorescence, X-Ray Diffraction and Scanning Electronic Microscopy in order to investigate the microstructural phenomena that allow the new materials’ sintering.

Effect of Dipping Numbers on the Crystalline Phase and Microstructure of Ag-TiO2 Coating

2016 ◽  
Vol 694 ◽  
pp. 133-137 ◽  
Author(s):  
A.R. Nurhamizah ◽  
M.R. Zulkifli ◽  
Jariah Mohd Juoi ◽  
Muharniza Azinita Musa
Keyword(s):  
Crystalline Phase ◽  
Anatase Phase ◽  
Sol Gel ◽  
Dip Coating ◽  
Sem Analysis ◽  
Ceramic Tiles ◽  
Cross Sectional ◽  
Good Surface ◽  
Coating Layers ◽  
Dip Coating Technique

Sol-gel dip-coating technique was utilized to prepare Ag-TiO2 coating with additive (Degussa P25) on unglazed ceramic tiles. Three different numbers of coating layers (5, 7 and 10 layers) were deposited on unglazed ceramic tiles made of waste glass. The coatings were sintered at 500 °C with the heating rate of 2 °C/min. The crystalline phase and cross sectional areas of the coatings were evaluated using GAXRD and SEM analysis, respectively. Results showed that the average thickness of the coating increased from 7 µm to 9 µm and to 12 µm for 5, 7 and 10 coating layers, correspondingly. Coating of 10 layers exhibited a high crystallinity of anatase phase, a good surface morphology without significant cracks, and a homogeneous coating compared to the 5 and 7 layers of coating, which suggested a better performance in Ag-TiO2 coating.

Application of Ag-Doped Nano-TiO2 Prepared at Low-Temperature to Multi-Functional Finishing of Cotton Fabric

2013 ◽  
Vol 821-822 ◽  
pp. 1346-1352
Author(s):  
Yi Huang ◽  
Li Ming Wang ◽  
Yong Shen
Keyword(s):  
Low Temperature ◽  
Anatase Phase ◽  
Antibacterial Properties ◽  
Molar Ratio ◽  
Tetrabutyl Titanate ◽  
Uv Resistance ◽  
X Ray Diffraction ◽  
Performance Results ◽  
Resistance Performance ◽  
The Impact

Ag-doped nano-TiO2 sol was prepared at a low temperature and was used to finishing cotton fabrics, and observed the crystal structure and the dispersion of nano-TiO2 on the fabric by X-ray diffraction (XRD) and scanning electron microscope (SEM); Discussed the influence of different amount of silver on antibacterial properties; Studied the impact of different finishing methods on UV resistance performance as well as the degradation of methylene blue and VOC performance. Results showed that Ag-doped nano-TiO2 on the fabric which was finished by steaming method with the sol agent were anatase phase,and its particle size was 20-40 nm, when the molar ratio of tetrabutyl titanate and silver nitrate was 70:1, the Bacteriostatic rate was 99.9%, and fastness to washing was well, UV resistance and degradation of MB and VOC performance had greatly ascended, and less influence on the fabric performance.

Performance of Rutile as an Antibacterial Material in Ceramic Tiles

2015 ◽  
Vol 1087 ◽  
pp. 484-487
Author(s):  
Hasmaliza Mohamad ◽  
Ahmad Kamil Fakhruddin Mokhtar
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
X Ray Diffraction ◽  
Ceramic Tiles ◽  
Glazed Tile ◽  
Antibacterial Test ◽  
X Ray ◽  
Antibacterial Material ◽  
Optimum Sample ◽  
Scanning Electron

The study was focused on the performance of rutile addition in the glaze for antibacterial application. Rutile powder in micro size (<5µm) (at different composition 5 wt%, 7 wt%, 9 wt%, 10 wt% and 15 wt%) were added in the glaze. Glazing was performed by dipping method for 10 seconds. Glazed tile was then sintered at 1200°C for 1 hour. Characterizations used to observe the properties of produced tiles were physical observation, scanning electron microscopy (SEM) and X-ray diffraction (XRD). Optimum sample was undergone an antibacterial test towards E.coli.

Effect of Silver Content on the Crystalline Phase and Microstructure of TiO2 Coating Deposited on Unglazed Ceramics Tile

2020 ◽  
Vol 17 (3) ◽  
pp. 8179-8185
Author(s):  
N.Z. Hafizah ◽  
J. M. Juoi ◽  
M.R. Zulkifli ◽  
M.A. Musa
Keyword(s):  
Particle Growth ◽  
Dip Coating ◽  
Tio2 Coating ◽  
High Concentration ◽  
Ceramic Tiles ◽  
Soaking Time ◽  
Heat Treated ◽  
Ag Particles ◽  
Tio2 Sol ◽  
Almost All

The synthesis of Ag-TiO2 coating using AgNO3 precursor is expected to give the properties as pure as Ag nanoparticles. Commonly, high concentration of Ag attributed to agglomeration of silver species and reduction to Ag0 particles on TiO2 surface. In contrast, at lower concentration, Ag species exist as AgO, Ag2O and Ag0. Hence, the exact amount of Ag, which can effectively control the particle growth and agglomeration, surface area, thermal stability and band gap of the TiO2 coating, are still vague and stated differently. In the present study, the effect of Ag content on the phase transformation and surface morphology of Ag-TiO2 coating were reported. TiO2 sol were prepared by incorporating Ag at 2.5, 5 and 7.5 mol % and deposited on unglazed ceramic tiles thru five times dip coating. The deposited Ag-TiO2 coatings were heat treated at 500 °C for 1 hour soaking time. XRD analyses revealed that the deposited Ag-TiO2 coating consists of anatase, rutile, Ag2O and metallic Ag. Almost all the coating surfaces illustrated cracks. Increased Ag content lead to presence of tiny particles on the surfaces and EDX spectrum revealed the presence of Ti, O and metallic Ag particles. However, at the addition of 5 mol % Ag, there was no metallic Ag presence and a dense coating with the lowest thickness of ±11.4µm is observed.

scholarly journals A Superhydrophobic, Antibacterial, and Durable Surface of Poplar Wood

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1885
Author(s):  
Xinyu Wu ◽  
Feng Yang ◽  
Jian Gan ◽  
Zhangqian Kong ◽  
Yan Wu
Keyword(s):  
Stearic Acid ◽  
Antibacterial Properties ◽  
Alkali Resistance ◽  
Poplar Wood ◽  
X Ray Diffraction ◽  
X Ray ◽  
Different Temperatures ◽  
Acid And Alkali Resistance ◽  
The Stability

The silver particles were grown in situ on the surface of wood by the silver mirror method and modified with stearic acid to acquire a surface with superhydrophobic and antibacterial properties. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and X-ray energy spectroscopy (XPS) were used to analyze the reaction mechanism of the modification process. Scanning electron microscopy (SEM) and contact angle tests were used to characterize the wettability and surface morphology. A coating with a micro rough structure was successfully constructed by the modification of stearic acid, which imparted superhydrophobicity and antibacterial activity to poplar wood. The stability tests were performed to discuss the stability of its hydrophobic performance. The results showed that it has good mechanical properties, acid and alkali resistance, and UV stability. The durability tests demonstrated that the coating has the function of water resistance and fouling resistance and can maintain the stability of its hydrophobic properties under different temperatures of heat treatment.

scholarly journals Synthesis, Characterization, Antibacterial Properties, and In Vitro Studies of Selenium and Strontium Co-Substituted Hydroxyapatite

2021 ◽  
Vol 22 (8) ◽  
pp. 4246
Author(s):  
Muhammad Maqbool ◽  
Qaisar Nawaz ◽  
Muhammad Atiq Ur Atiq Ur Rehman ◽  
Mark Cresswell ◽  
Phil Jackson ◽  
...  
Keyword(s):  
Negative Impact ◽  
Antibacterial Properties ◽  
Biological Properties ◽  
Ion Concentration ◽  
Charge Composition ◽  
Bacterial Strains ◽  
X Ray Diffraction ◽  
Molar Ratios ◽  
Human Osteosarcoma Cells

In this study, as a measure to enhance the antimicrobial activity of biomaterials, the selenium ions have been substituted into hydroxyapatite (HA) at different concentration levels. To balance the potential cytotoxic effects of selenite ions (SeO32−) in HA, strontium (Sr2+) was co-substituted at the same concentration. Selenium and strontium-substituted hydroxyapatites (Se-Sr-HA) at equal molar ratios of x Se/(Se + P) and x Sr/(Sr + Ca) at (x = 0, 0.01, 0.03, 0.05, 0.1, and 0.2) were synthesized via the wet precipitation route and sintered at 900 °C. The effect of the two-ion concentration on morphology, surface charge, composition, antibacterial ability, and cell viability were studied. X-ray diffraction verified the phase purity and confirmed the substitution of selenium and strontium ions. Acellular in vitro bioactivity tests revealed that Se-Sr-HA was highly bioactive compared to pure HA. Se-Sr-HA samples showed excellent antibacterial activity against both Gram-negative (Escherichia coli) and Gram-positive (Staphylococcus carnosus) bacterial strains. In vitro cell–material interaction, using human osteosarcoma cells MG-63 studied by WST-8 assay, showed that Se-HA has a cytotoxic effect; however, the co-substitution of strontium in Se-HA offsets the negative impact of selenium and enhanced the biological properties of HA. Hence, the prepared samples are a suitable choice for antibacterial coatings and bone filler applications.

Sign in / Sign up

Export Citation Format

Share Document