Effect of Ultra Violet (UV) Irradiation as an Environmentally Friendly Pre-Treatment on Dyeing Characteristic and Colorimetric Analysis of Wool

ABSTRACTSurface lattice displacements of titanium dioxide (TiO2: rutile) during ultra-violet (UV) light irradiation have been investigated using a total reflection x-ray diffraction, which provides a high signal to noise ratio (S/N) and superior in-plane surface diffraction. Under the environments in vapors of H2O, CH3OH, C2H5OH and C3H6OH, the photo-catalytic activities of TiO2 (110), (100) and (001) surfaces subject to UV irradiation have been measured. It is found that the diffraction peaks and their full width half maxima (FWHMs) show some peculiarities with respect to the photo-catalytic activities in both surface lattices and adsorbed molecules in vapors. Furthermore, Kelvin force microscopy (KFM) has showed that there exists a very high surface potential, probably due to surface atom displacements induced by UV irradiation. With regard to the origin of the photo-catalytic activities, the induced surface potentials are discussed.

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Enhanced synthesis method of graphene oxide

Nanoscale Advances ◽

10.1039/d0na00706d ◽

2021 ◽

Vol 3 (1) ◽

pp. 223-230

Author(s):

Zineb Benzait ◽

Pengwan Chen ◽

Levent Trabzon

Keyword(s):

Graphene Oxide ◽

Electrical Properties ◽

Synthesis Method ◽

Environmentally Friendly ◽

Mechanical And Electrical Properties ◽

Pre Treatment ◽

Treatment Step

A simple and environmentally friendly pre-treatment step allows the production of graphene oxide with few defects and high mechanical and electrical properties.

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Environmentally Friendly Treatment of Textiles Using Electrochemically Generated O3-Water with UV Irradiation

ECS Meeting Abstracts ◽

10.1149/ma2020-02191543mtgabs ◽

2020 ◽

Vol MA2020-02 (19) ◽

pp. 1543-1543

Author(s):

Tsuyoshi Ochiai ◽

Kengo Hamada ◽

Kyohei Miyano ◽

Yosuke Ishikawa ◽

Toshinari Nagura ◽

...

Keyword(s):

Uv Irradiation ◽

Environmentally Friendly

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UV-Irradiation Effects on Interfacial Strength between Thin Ceramic Film and Polymer Substrate

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.297-300.2284 ◽

2005 ◽

Vol 297-300 ◽

pp. 2284-2289 ◽

Cited By ~ 7

Author(s):

Masaki Omiya ◽

Hirotsugu Inoue ◽

Kikuo Kishimoto ◽

Masaaki Yanaka ◽

Noritaka Ihashi

Keyword(s):

Adhesion Strength ◽

Uv Irradiation ◽

Interfacial Adhesion ◽

Interfacial Strength ◽

Ultra Violet ◽

Peel Test ◽

Polymeric Materials ◽

Polymer Substrate ◽

Ceramic Films ◽

Interfacial Adhesion Strength

This aim of this study is to investigate the effect of UV (Ultra Violet ray) irradiation on the interfacial adhesion strength between thin ceramic films and polymer substrate. Electric conductive films based on polymer substrates have attracted attention for use in flexible optoelectronic devices. It is well known that the mechanical properties of polymeric materials are degraded by UV irradiation. Therefore, it is considered that the UV irradiation also affects the interfacial adhesion strength between ceramic coating and polymer substrate. The interfacial adhesion strength was measured by Multi-stages peel test. The results show that the interfacial strength decreases with UV irradiation. However, if a filter layer is installed between ceramic and polymer substrate, the degradation ratio becomes small.

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Effect of Sonication Pre-treatment of TiO2 Catalyst for Photo-Degradation of Acid Orange 7 Azo Dye

International Journal of Chemistry ◽

10.5539/ijc.v11n2p22 ◽

2019 ◽

Vol 11 (2) ◽

pp. 22

Author(s):

D. K. Kariuki ◽

P. K. Tum

Keyword(s):

Azo Dye ◽

Crystal Size ◽

Dye Degradation ◽

Ultra Violet ◽

Acid Orange 7 ◽

Photo Degradation ◽

Acid Orange ◽

Violet Light ◽

Pre Treatment ◽

Scanning Electron

In this study, Acid Orange 7 azo dye was degraded on TiO2 catalyst layer illuminated with ultra-violet light. The TiO2 suspension had prior been sonicated at 20 kHz before electrophoretic deposition on smooth stainless steel surfaces, with the aim of increasing the efficiency of azo dyes degradation. The effect of sonication on the TiO2 suspension of 10 g.L-1 and electrophoretic deposition loading to layers on surfaces was studied. Morphological properties of the electrophoretic layers from two different suspensions, Alpha and Sigma TiO2 were characterized by Scanning Electron Microscopy to establish the specific surface properties, particle loading and crystalline sizes. A four–position reactor was used for dye degradation experiments under Ultra Violet light at 355 nm wavelength. The degradation of the azo dye was monitored at 30minutes interval for a total of 2 hours using Ultra Violet-Visible Spectrophotometer at λ = 485 nm. It was found out that 60% of dye degradation was achieved after 120 minutes without sonication pretreatment. Sonication pre-treatment resulted in 71.42% increase on the rate of photo-degradation, at a loading of 0.32 mg/cm2. Particulate layers coated with Alpha TiO2 showed more photoactivity compared to Sigma TiO2. Scanning Electron Microscopy indicated that Alpha TiO2 had  50 m2/g surface area and  28 nm crystal size compared to Sigma TiO2 with 10 m2/g and 169 nm crystal size. This study shows that sonication pretreatment of Alpha TiO2 /UV light system is most effective in photo-degrading Acid Orange 7 dye.

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Green Strategy for Production of Antimicrobial Textiles

Handbook of Research on Uncovering New Methods for Ecosystem Management through Bioremediation - Advances in Environmental Engineering and Green Technologies ◽

10.4018/978-1-4666-8682-3.ch014 ◽

2015 ◽

pp. 346-366

Author(s):

Nagia Farag Ali

Keyword(s):

Microwave Heating ◽

Antimicrobial Agents ◽

Ultra Violet ◽

Antimicrobial Activities ◽

Chemical Bonds ◽

Dye Uptake ◽

Green Strategy ◽

Pre Treatment ◽

Bacteria And Fungi ◽

Dyed Fabric

The article deals with the measurement of the antimicrobial activity for some natural dyes against various types of microbes as (Escherichia coli, Staphylococcus aureus and Pseudomons aeruginosa), Using nano materials for some metals or its oxides as titanium oxide for treatment of fabrics before dyeing, these materials were fixed on the fiber by chemical bonds to acquire new properties as antimicrobial activities against bacteria and fungi and also to protect from ultra violet rays. Using a traditional and microwave heating for extraction of dyes and dyeing methods because microwave heating is a more effective method than traditional heating. Other additional features are that, they are cheaper, more economical, eco-friendly, and produce a higher dye uptake as compared to conventional techniques, environmentally friendly pre-treatment by chitosan before dyeing in order to obtain dyed fabric with high quality and more protected against microbes. Application of antimicrobial agents in the development in the textiles as chitosan, qutenary ammonium salt and neem.

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Synergistic effect of ultrasonic pre-treatment combined with UV irradiation for secondary effluent disinfection

Ultrasonics Sonochemistry ◽

10.1016/j.ultsonch.2013.03.010 ◽

2013 ◽

Vol 20 (6) ◽

pp. 1384-1389 ◽

Cited By ~ 21

Author(s):

Xin Jin ◽

Zifu Li ◽

Lanlan Xie ◽

Yuan Zhao ◽

Tingting Wang

Keyword(s):

Synergistic Effect ◽

Uv Irradiation ◽

Secondary Effluent ◽

Pre Treatment

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Green Strategy for Production of Antimicrobial Textiles

Fashion and Textiles ◽

10.4018/978-1-5225-3432-7.ch019 ◽

2017 ◽

pp. 442-461

Author(s):

Nagia Farag Ali

Keyword(s):

Microwave Heating ◽

Antimicrobial Agents ◽

Ultra Violet ◽

Antimicrobial Activities ◽

Chemical Bonds ◽

Dye Uptake ◽

Green Strategy ◽

Pre Treatment ◽

Bacteria And Fungi ◽

Dyed Fabric

The article deals with the measurement of the antimicrobial activity for some natural dyes against various types of microbes as (Escherichia coli, Staphylococcus aureus and Pseudomons aeruginosa), Using nano materials for some metals or its oxides as titanium oxide for treatment of fabrics before dyeing, these materials were fixed on the fiber by chemical bonds to acquire new properties as antimicrobial activities against bacteria and fungi and also to protect from ultra violet rays. Using a traditional and microwave heating for extraction of dyes and dyeing methods because microwave heating is a more effective method than traditional heating. Other additional features are that, they are cheaper, more economical, eco-friendly, and produce a higher dye uptake as compared to conventional techniques, environmentally friendly pre-treatment by chitosan before dyeing in order to obtain dyed fabric with high quality and more protected against microbes. Application of antimicrobial agents in the development in the textiles as chitosan, qutenary ammonium salt and neem.

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