Article content
text
article
2019
per
Journal of Studies in Color World
Institute for Color Science and Technology
2251-7278
9
v.
2
no.
2019
0
0
https://jscw.icrc.ac.ir/article_81634_2cf3049723008f98d4a4cc2ca0fbaf78.pdf
The Study of Methods for the Degradation of Organic Dyes by Photocatalytic Nanoparticles Using Plasmonic Property
Seyedeh Hadis
Mortazavi Milani
a) Department of Polymer Engineering & Color Technology, b)Color & Polymer Research Center (CPRC), Amirkabir University of Technology
author
Ali Asghar
Sabbagh Alvani
Color & Polymer Research Center (CPRC), Amirkabir University of Technology
author
Reza
Salimi
Color & Polymer Research Center (CPRC), Amirkabir University of Technology
author
Hassan
Sameie
Color & Polymer Research Center (CPRC), Amirkabir University of Technology
author
text
article
2019
per
Water pollution, population growth and the increasing demand for clean water have led humans to water treatment and reuse. Therefore, efforts to improve wastewater treatment techniques and the degradation of toxic compounds into non-toxic compounds have always been considered. photocatalysts, due to rapid oxidation and degradation of pollutants than traditional methods, as known as low-cost, environmental friendly and efficient method. Photocatalysts are semiconductors that absorb light then generate electrons and holes, which after reacting with water and oxygen, and producing radical species such as superoxide, etc., cause the degradation of organic compounds.The metallic nano-structures with plasmonic effect has an influence on increasing the light absorption amplitude of semiconductors. Surface plasmon resonance in metallic nano-structures against light generates plasmonic energy, which is transmitted to the semiconductor by three main mechanisms: light scattering, PIRET-induced resonance energy transfer and hot electron injection, which researches indicate that these factors increase photocatalytic efficiency in dye degradation.
Journal of Studies in Color World
Institute for Color Science and Technology
2251-7278
9
v.
2
no.
2019
1
8
https://jscw.icrc.ac.ir/article_81571_6968735f669423e4c42eb20a7c5795ee.pdf
Application of Photocatalysts and Their Effective Parameters in the Treatment of Colored Wastewaters
Marzieh
Ghaemizade
Textile Engineering Department, Yazd University
author
Mohammad
Khajeh Mehrizi
Textile Engineering Department, Yazd University
author
text
article
2019
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In recent years, due to the reduction of freshwater resources, wastewater treatment has attracted a lot of attention. The presence of metal ions, dyes and chemicals in industrial wastewaters has caused disturbances in biological activities in the water. Dyes are compounds with a complex structure, usually toxic and resistant to biological degradation, which enters the environment by industrial wastewater. A lot of research has been done to find a way to remove dyes from wastewater. Research and development in this field have created a new process called advanced oxidation processes, particularly in the form of heterogeneous photocatalysis that converts photon energy into chemical energy. The photocatalyst is a catalyst that is activated by light radiation and converts pollutants in air or water into materials such as water and carbon dioxide. This research is a summary of the applied studies on dye removal using photocatalytic nanoparticles. Additionally, the effects of the fundamental parameters such as temperature, pH, and reaction time have also been reviewed.
Journal of Studies in Color World
Institute for Color Science and Technology
2251-7278
9
v.
2
no.
2019
9
21
https://jscw.icrc.ac.ir/article_81606_b0ac240945af2a85f6d3d11f3fa91e57.pdf
Review on Modification Methods of TiO2 Nanotubes for Photocatalytic Degradation of Dyes
mehri
maghsoudi
Department of metallurgy, Tabriz University
author
Shahin
khameneh Asl
Department of metallurgy, Tabriz University
author
text
article
2019
per
Annually, insoluble biodegradable dyes in textile, leather, paper and food industries, photovoltaic cells are evacuated to natural water flows. The highly ordered TiO2 nanotube arrays made with titanium anodizing, due to its large surface area, strong oxidizing ability and excellent charge transfer performance, have been widely used as photocatalyst for decomposition of dyes in recent years. Nevertheless, the disadvantages of TiO2 are the vast energy gap (3.0-3.2 eV) and the high recombination of electron-hole derived from light that limits the use of TiO2 nanotubes in the use of visible light to decompose organic pollutants. For this purpose, in recent years, many attempts have been made to modify TiO2 nanotubes to increase light absorption to visible light, limit the band gap, increase surface area, and prevent the recombination of charge carriers. To overcome these limitations and increase photocatalytic activity of nanotubes, various methods have been investigated: decoration with noble metal particles, doping with metal elements, modification with semiconductor and doping with non-metallic elements.
Journal of Studies in Color World
Institute for Color Science and Technology
2251-7278
9
v.
2
no.
2019
21
29
https://jscw.icrc.ac.ir/article_81607_0e328c9fec62c6b10ac2663b9b4f346e.pdf
A Review of Piezoelectric Ink-Jet Printing Heads
Atasheh
Soleimani-Gorgani
Department of Printing Science and Technology, Institute for Color Science and Technology
author
text
article
2019
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Ink-jet printing is a non-contact printing method. In this technology, the drops of ink are jetted digitally through a small nozzle onto the specific substrate to produce an image. The ink drop formation is initiated via a pressure pulse applied from the head of the printer to the nozzle. Depending on the way of creating the pressure pulse, the ink-jet printing heads are divided into different classes. These various classes of ink-jet printing head differ in term of the structure of the nozzle such as numbers, material, size and shape, printability of ink, droplet size and shape, print wide, resolution and durability. Therefore, in some cases, the choice of the exact printer is difficult for a researcher or customer. This paper reports different types of ink-jet printing heads within their characterization to giddiness user. Also, it introduces various manufacturers who produce a diverse class of head to use in different application such as paper, textile, ceramic and electronic.
Journal of Studies in Color World
Institute for Color Science and Technology
2251-7278
9
v.
2
no.
2019
31
42
https://jscw.icrc.ac.ir/article_81619_3463d60e07d9eecfa63cad2fd1f11fc7.pdf
Color in Arsen Zandieh Shiraz
Farhad
Avaznejad
Department of Architecture and Urban Development, Technical and Vocational Faculty of shiraz shahid Bahonar University
author
Hamidreza
Sheibani
Jahan Nama Design Atelier, Fars Province Science and Technology Park
author
text
article
2019
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Stating the issue with a quick look at the traditional system of Iranian cities and the specific hierarchy existing in them, it may be claimed that in their culture, the manifestation of the spirit of the residents and compatible with their surrounding nature is visible. It’s very important to know how the presence of colors are used in space and for what purpose colors are used. Nowadays, due to the ongoing construction process, we are witnessing a diminution identity of the cities and this is a matter that needs to be checked. The aim and focuse of the present study on color, color combinations, semantic relation between colors and the role of this coordination in creating perspective Integrated to the urban cities in the Iranian-Islamic cities, Arsan Shahri Zandieh Shiraz is a small sample of Iranian urban perspective that the role and impact of color in this collection has been reviewed.The research method of this paper is descriptive-analytical. To formulate a theoretical framework of the research, library studies and to analyze the colors used in this collection of field observations, the method of Hey Baang and the method of Langlo has been used. The findings of the research show that the creation of a unique urban space such as the Zand to Shiraz, color as an element importantly, a special look has been made. In the arts and architecture of this collection of color-compatible climates and indigenous identities are used. Also, maximum use of color to increase the sensory and visual of this place can be seen. The study and analysis of urban spaces left over from the traditional city in the incidence and the rules and rules governing it can be reference and responsive.
Journal of Studies in Color World
Institute for Color Science and Technology
2251-7278
9
v.
2
no.
2019
43
52
https://jscw.icrc.ac.ir/article_81621_bbcd71e80926aa9b79c9a6f14f30803d.pdf
Production of Laser Jet Printer Toner by in Situ Emulsion Polymerization Method
Bahareh
Babaei
Department of Polymer Engineering, Qom University of Technology
author
Mohsen
Najafi
Department of Polymer Engineering, Qom University of Technology
author
Maryam
Ataeefard
Department of Printing Science and Technology, Institute for Color Science and Technology
author
text
article
2019
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From the past to the present day, various methods of printing have been used in terms of application, among which the most widely used method of them is electrophotography. The increasing demand for this technique increases the importance of obtaining high-resolution images in electrophotography. Therefore, the processes and the materials that are used are continuously improving and progressing. In this paper, at the first the toner and its components are introduced, then the properties of toner that effect on its quality is expressed. Followed by, different methods of toner production, especially the in situ emulsion polymerization method are described. The emulsion polymerization can be of great interest in toner production because of its ability to form composite particles with encapsulated structure and spherical shape as well as high reaction conversion. In this regard, different effective parameters and components of this method to produce of toner are introduced. Finally, the benefits of this method are expressed in comparison to other production methods of toner.
Journal of Studies in Color World
Institute for Color Science and Technology
2251-7278
9
v.
2
no.
2019
53
64
https://jscw.icrc.ac.ir/article_81620_9f1e9ab4fe4af452458d9560c92a0b01.pdf
Key words
text
article
2019
per
Journal of Studies in Color World
Institute for Color Science and Technology
2251-7278
9
v.
2
no.
2019
65
66
https://jscw.icrc.ac.ir/article_81635_4f102cf967517fcdf9c4c036723e3cee.pdf