The Application of Modified Anatase Nano-TiO2

2013 ◽  
Vol 643 ◽  
pp. 131-134
Author(s):  
Jian Chun Wu
Keyword(s):  
Metal Ion ◽  
Degradation Rate ◽  
Photocatalytic Properties ◽  
Test Results ◽  
Nano Tio2 ◽  
Antibacterial Materials ◽  
Ion Doping ◽  
Formaldehyde Degradation

The anatase nano-TiO2 was modified by metal ion-doping to improve its photocatalystic activity. Then the modified nano-TiO2 was used in coating as a formaldehyde degradation material and antibacterial materials. The test results showed that modified nano-TiO2 photocatalytic properties was significantly improved whose formaldehyde degradation rate reached 85% and bacteriostatic rate was more than 99%. Then the photocatalytic theory and the antibacterial theory of modified nano - TiO2 were analyzed.

Effect of transition metal ion doping on photocatalytic properties of In–Ti oxides

2015 ◽  
Vol 30 (21) ◽  
pp. 3259-3266 ◽  
Author(s):  
Mrinal Rajesh Pai ◽  
Atindra Mohan Banerjee ◽  
Shymala Rajkumar Bharadwaj
Keyword(s):  
Transition Metal ◽  
Metal Ion ◽  
Photocatalytic Properties ◽  
Transition Metal Ion ◽  
Ti Oxides ◽  
Ion Doping ◽  
Image Position

Abstract

scholarly journals Natural Coatings on Titanium Surfaces to Improve Their Biological Response

2020 ◽  
Vol 2 (1) ◽  
pp. 18
Author(s):  
Sara Ferraris ◽  
Enrica Verné ◽  
Gissur Örlygsson ◽  
Paulo Tambasco ◽  
Felipe Perraro Sehn ◽  
...  
Keyword(s):  
Natural Products ◽  
Metal Ion ◽  
Antibacterial Properties ◽  
Biological Response ◽  
Aqueous Environment ◽  
Natural Substances ◽  
Ion Doping ◽  
Keratin Fibers ◽  
Scratch Tests ◽  
Titanium Substrates

Biomolecules and extracts from natural products are gaining increasing interest due to their beneficial properties for human health, low toxicity, environmental compatibility and sustainability. In this work, keratin, chitosan and peppermint essential oil have been used for the preparation of coatings on titanium substrates for biomedical implants/devices. All these coatings were obtained from local natural products/byproducts: keratin from discarded wool, chitosan from shrimp shells and peppermint essential oils from a local production. The above cited molecules were selected for their ability to stimulate soft tissue adhesion (keratin), anti-inflammatory activity (chitosan) and antibacterial activity (keratin after metal ion doping, chitosan and mint oil). The coatings were characterized by means of SEM-EDS, FTIR, zeta potential, wettability, tape and scratch tests, and cell and bacteria cultures. The coatings were successfully obtained for all the considered natural substances with good adhesion to the titanium substrates. All the coatings are chemically stable in water and the continuous coatings are mechanically resistant and protective for the metallic substrates. The keratin coatings are hydrophilic while the mint oil and chitosan coatings are hydrophobic; nanofibers, instead of continuous coatings, behave as more hydrophobic. At the physiological pH, the keratin and mint oil coatings are negatively charged when in contact with an aqueous environment, while the chitosan ones are positively charged. The oriented keratin fibers are able to drive fibroblast alignment. The Ag-doped keratin fibers and mint coating show antibacterial properties.

scholarly journals Preparation Technique and Properties of Nano-TiO2 Photocatalytic Coatings for Asphalt Pavement

2018 ◽  
Vol 8 (11) ◽  
pp. 2049 ◽  
Author(s):  
Hui Wang ◽  
Ke Jin ◽  
Xinyu Dong ◽  
Shihao Zhan ◽  
Chenghu Liu
Keyword(s):  
Water Permeability ◽  
Degradation Rate ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Exhaust Gas ◽  
Preparation Technique ◽  
Tio2 Content ◽  
Nano Tio2 ◽  
Evaluation Indexes ◽  
Technical Requirements

According to the characteristics of asphalt pavement, a kind of nano-TiO2 photocatalytic coating was prepared by using the emulsified asphalt as the carrier. All of its properties met the technical requirements. An exhaust gas degradation test device and its test steps were developed. The evaluation indexes, cumulative degradation rate, and degradation efficiency, were put forward. From the two aspects of the nano-TiO2 content in photocatalytic coatings and the spraying amount of photocatalytic coatings in the surface of slabs (300 mm × 300 mm), the exhaust gas degradation effects, the performances of skid resistance, and the water permeability of asphalt mixture were analyzed. The test results showed that the cumulative degradation rate of exhaust gas was better when nano-TiO2 content was increased in the range of 0–8% and the spraying amount was changed in the range of 0–333.3 g/m2. In practical engineering applications, the anti-skid performance of asphalt pavement can be satisfied when the spraying amount of photocatalytic coating was limited to under 550 g/m2. The spraying amount of nano-TiO2 photocatalytic coating had little effect on the water permeability of the asphalt mixture. Therefore, 8% nano-TiO2 content in the coating and a 400 g/m2 spraying amount were finally recommended based on the photocatalytic properties, as well as for economic reasons.

Degradation of Phenol by Fe3+ Doped Nano-TiO2 Photocatalyst

2013 ◽  
Vol 859 ◽  
pp. 361-364 ◽  
Author(s):  
Jing Wang ◽  
Du Shu Huang ◽  
Wei Liu ◽  
Qing Shan Pan ◽  
Yong Min
Keyword(s):  
Degradation Rate ◽  
Annealing Temperature ◽  
Sol Gel ◽  
Phenol Degradation ◽  
Nano Tio2 ◽  
Phenol Solution ◽  
Sol Gel Process ◽  
Two Peaks ◽  
Degradation Properties ◽  
Better Than

Degradation properties of phenol using nano-TiO2 as photocatalyst in aqueous solution were investigated. The effect of annealing temperature and ionic modification on the degradation was studied. The results showed that, 500 °C annealed TiO2 was better than 700 °C annealed. Photocatalyst nano-TiO2 material doped with Fe3+ was prepared quickly by sol-gel process and was used as photocatalyst to degrade phenol solution of 100mg/L under UV irradiation for 3 hours. UV spectrophotometer testing was made and found that two peaks at 210 nm and 270 nm were significantly become low, indicating that the phenol has been degraded. The phenol degradation rate was 94.18%.

scholarly journals Effect of metal ion doping on the photocatalytic activity of aluminophosphates

2010 ◽  
Vol 122 (5) ◽  
pp. 771-785 ◽  
Author(s):  
Avijit Kumar Paul ◽  
Manikanda Prabu ◽  
Giridhar Madras ◽  
Srinivasan Natarajan
Keyword(s):  
Photocatalytic Activity ◽  
Metal Ion ◽  
Ion Doping

Study on Chlorpyrifos Residues Degradation by Mutagenic Bacteria DX1 in Soil

2013 ◽  
Vol 726-731 ◽  
pp. 3992-3995
Author(s):  
Ming Fen Niu ◽  
Jian Wei ◽  
Chen Liang
Keyword(s):  
Degradation Rate ◽  
Ph Value ◽  
Orthogonal Experiment ◽  
Organic Fertilizer ◽  
Test Results ◽  
Soil Environment ◽  
Soil Fertilization ◽  
Spss Software ◽  
The Impact ◽  
Different Levels

In this study, it was carried out by designing PH, soil fertilization content, humidity and mutagenic bacteria DX1 inoculation concentration of orthogonal experiment to research chlorpyrifos degradation rate in the soil, which was affected by mutagenic bacteria DX1 in the soil environment. SPSS software was taken visualized analysis and variance analysis to evaluate the impact of different levels of the test results, to determine the factors which had significant impact on the experimental results. It showed that the best environmental factors of chlorpyrifos degradation rate in soil were the pH 7, organic fertilizer content 5mg/kg, the soil moisture 70%, inoculation volume 50ml/kg. The pH value and inoculation volume had a significant impact on chlorpyrifos degradation rate in soil; the soil humidity had little effect and the organic fertilizer content had almost no effect.

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