Solar photocatalytic degradation of textile effluent with TiO2, ZnO, and Nb2O5 catalysts: assessment of photocatalytic activity and mineralization

Souza, Renata Padilha de; Ambrosio, Elizângela; Souza, Maísa Tatiane Ferreira de; Freitas, Thabata Karoliny Formicoli Souza; Ferrari, Ana Maria; Garcia, Jocilaine

doi:10.1007/s11356-017-8408-8

Cited by 32 publications

(11 citation statements)

References 34 publications

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“…Furthermore, ZnO Ps have been applied to textile fibers to improve flame retardancy and thermal stability and to achieve moisture management and thermal insulation, electrical conductivity, and hydrophobicity [5][6][7][8][9][10][11][12][13][14][15][16]. The photocatalytic properties also enable ZnO Ps to be used as degradation agents for different pollutants, such as dyes and surfactants present in textile industry wastewaters [12,[17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Zinc Oxide for Functional Textile Coatings: Recent Advances

2019

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The use of ZnO for the functionalization of textile substrates is growing rapidly, since it can provide unique multifunctional properties, such as photocatalytic self-cleaning, antimicrobial activity, UV protection, flame retardancy, thermal insulation and moisture management, hydrophobicity, and electrical conductivity. This paper aims to review the recent progress in the fabrication of ZnO-functionalized textiles, with an emphasis on understanding the specificity and mechanisms of ZnO action that impart individual properties to the textile fibers. The most common synthesis and application processes of ZnO to textile substrates are summarized. The influence of ZnO concentration, particle size and shape on ZnO functionality is presented. The importance of doping and coupling procedures to enhance ZnO performance is highlighted. The need to use binding and seeding agents to increase the durability of ZnO coatings is expressed. In addition to functional properties, the cytotoxicity of ZnO coatings is also discussed. Future directions in the use of ZnO for textile functionalization are identified as well.

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Section: Introductionmentioning

confidence: 99%

Zinc Oxide for Functional Textile Coatings: Recent Advances

2019

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“…Therefore, the nitriding treatment lead to a 13% increase in MB reduction efficiency. A good result, since recent works demonstrated that TiO2 still is one of the best compounds for solar photocatalytic degradation of effluents, in spite of the difficulty in separation and reuse when nanostructures dispersed in solution are utilized [34,35]. Considering this, nitrided TiO2 nanotubes, used in this work, present another advantage over other TiO2 nanostructures since they exhibit higher surface adhesion to substrates, which greatly reduces its disposal together with the photodegraded material.…”

Section: Resultsmentioning

confidence: 86%

A Microfluidic Device Based on Plasma Nitrided Self-Organized TiO2 Nanotubes for Photocatalytic Reduction Study

Bonelli

Pereyra

2018

JICS

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Nitrided TiO2 nanotubes and PDMS microchannel were assembled in a photocatalytic device for organic dyes photo-degradation studies. By integrating a PDMS microchannel with the nitrided TiO2 nanotubes array, a microfluidic photocatalytic device was obtained and characterized by morphological, chemical, and physical points of view. The fabrication process allows an easy integration of the obtained nitrided TiO2 nanotubes with a microchannel into a microfluidic device for pollutant photo-degradation. The high surface-to-volume ratio intrinsic of nanotubes structures has functional properties for harvesting light and is responsible for part of the interesting photocatalytic device performance. Another great advantage of nitrided TiO2 nanotubes compared to just TiO2 nanotubes, is the lower gap of 2.80 eV achieved by plasma nitriding processes in PECVD reactor, which leads to a 14% increase in the photocatalytic response to sun light. As a consequence, the methylene blue reduction efficiency of the microfluidic device fabricated with nitrided TiO2 nanotubes increased 13% compared to that with just anodized TiO2 nanotubes.

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“…Moreover, TiO2 is a cheap, readily available material and the photogenerated holes are highly oxidizing ( (Barkul, 2017). Also, in the synthesis of the catalyst, it is important to take into account its easy separation from wastewater due to their particle sizes sizes (for example calcinated semiconductors) (Souza et al, 2017). Moreover, materials with good adsorption have been added to photocatalysts -powdered active carbon (Dhas et…”

Section: Photocatalytic Degradationmentioning

confidence: 99%

Treatment of wastewater containing printing dyes: summary and perspectives

Kerkez¹,

Bečelić‐Tomin²,

Milidrag³

et al. 2020

Proceedings - The Tenth International Symposium GRID 2020

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Synthetic dyes are widely used in textile, printing, leather tanning, cosmetic, drug and food processing industries. The printing and dyeing industry is considered as one of the most polluting industrial sectors. The printing process is very versatile and includes printing on paper as well as printing on textile, plastic and other materials. After the printing process is completed, various chemicals such as ethers, alcohols, phenols, aldehydes, ketones, benzene, and esters are used in the cleaning procedure. Resulting wastewater often contains a variety of solvents, surfactants, dyes, and other chemicals, thus greatly increasing the difficulty of wastewater treatment. Improper discharge of printing and dyeing wastewater into water bodies will have several effect, beginning with aesthetical issues followed by destruction of the aqueous ecosystem due to light attenuation, oxygen consumption and toxicity effects. Therefore, it is very important to find out and optimize printing and dying wastewater treatment techniques. Processes for dye removal from wastewater can be physical, chemical, biological and more recently hybrid treatments. Physical processes such as adsorption, based on mass transfer mechanism, are commonly used method mainly due to ease of operation and high efficiency. Chemical processes including coagulation and flocculation, advanced oxidation processes and electrochemical treatment are usually more expensive due t chemicals use, equipment requirements and electrical energy consumption. However, these techniques are destructive and may lead to total mineralization of dye molecules and accompanying pollutants. Biological treatment is a low-cost and environmentally friendly process that produces less sludge. This method has significant advantages but dye molecules are less prone to this kind of treatment as they are made to be stable and reluctant. So, the adjustment and optimization of biological treatment, for dye removal, is an ongoing field of research. In recent studies hybrid processes are gaining more attention, combining different techniques. Integrating treatments, as a cost-saving and time-saving process, can represent optimal solution for printing wastewater treatment.

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Solar photocatalytic degradation of textile effluent with TiO2, ZnO, and Nb2O5 catalysts: assessment of photocatalytic activity and mineralization

Cited by 32 publications

References 34 publications

Zinc Oxide for Functional Textile Coatings: Recent Advances

Zinc Oxide for Functional Textile Coatings: Recent Advances

A Microfluidic Device Based on Plasma Nitrided Self-Organized TiO2 Nanotubes for Photocatalytic Reduction Study

Treatment of wastewater containing printing dyes: summary and perspectives

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