Functionality of nano titanium dioxide on textiles with future aspects: Focus on wool

Montazer, Majid; Pakdel, Esfandiar

doi:10.1016/j.jphotochemrev.2011.08.005

Cited by 159 publications

(81 citation statements)

References 114 publications

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“…3 Among these applications, photocatalysis is considered to be the most practical due to its usage of sunlight to decompose organic pollutants. 4,5 The mechanism involved in photocatalysis reaction exerted by semiconductors, [6][7][8] mainly discussed the formation of free electrons and holes in the conduction and valance band region as explained in the literature. 2,10,20,21 Many methods such as sol gel route, 9,10 hydrothermal, 11 polyol synthesis, 12 and precipitation 13 had been reported in the synthesis of TiO 2 nanoparticles (NPs).…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of mesoporous anatase TiO₂nanoparticles and their photocatalytic activities

et al. 2017

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Titanium dioxide (TiO 2 ) materials have been the focus of many promising applications due to their low-cost, availability and biocompatible properties. In this study, mesoporous anatase TiO 2 nanoparticles were synthesised using a green chemistry approach. This visible-light active photocatalyst was prepared via a simple and solvent free precipitation method at low temperatures using titanium tetraisopropoxide (TTIP) as a precursor and soluble starch as the template. The effect of initial solution pH and concentration of TTIP on surface morphology and photocatalytic activities of TiO 2 nanoparticles were evaluated. Based on the results obtained, the TiO 2 nanocatalyst prepared using 0.01 mol of TTIP under basic conditions revealed the best photocatalytic activity. The as-synthesised nanoparticles were further characterised using X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and nitrogen adsorption analysis (NAA). The XRD spectrum confirmed that the catalyst was composed of anatase tetragonal TiO 2 phase. The Brunauer-Emmett-Teller (BET) surface area of 81.59 m 2 g À1 proved the presence of mesopores (average pore size ¼ 8.7 nm) which partially contributed to and catalysed the photodegradation process of methylene blue (MB) solution under sunlight. The effects of various parameters such as initial dye concentration, catalyst dosage and recyclability of the catalyst were evaluated to determine the best conditions. Results obtained suggest that TiO 2 nanoparticles synthesised through the green chemistry approach under optimum conditions exhibited an effective photodegradation process of MB solution under sunlight.

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Section: Introductionmentioning

confidence: 99%

Green synthesis of mesoporous anatase TiO₂nanoparticles and their photocatalytic activities

et al. 2017

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“…Second, TiO 2 P-25 (Evonik-Degussa) with surface area of 50m 2 /g and gap energy of 3.2eV [5,12] 2 . Afterwards, the sample was removed from the suspension and dried in stove at 30±2°C for 15min.…”

Section: Methodsmentioning

confidence: 99%

“…Inactivation of E. coli and effective disinfection of samples was due to TiO 2 presence in the samples, which was observed by SEM-EDS. Since the nature of TiO 2 P25 was not modified as shown in IR analysis, it is expected that when irradiated with UV light below λ<385nm (UV-A to B range) in the presence of water or air this semiconductor generates oxidizing radical species (OH*, O 2 * -) able to degrade the cell wall of microorganisms [5,12,27]. These processes of radicals formation occurs only in the surface of coating because the TiO 2 particles located inside the SiO 2 matrix of TiO 2 -SiO 2 coating do not have access to the incident light.…”

Section: Photocatalytic Activity and Coating Loss Of Modified Pe Sampmentioning

confidence: 99%

“…The development of these fabrics, as a strategy to combat the spread of nosocomial infections [7][8][9][10][11], is still in the primary state due to difficulties to immobilize TiO 2 on the fabric surface, so as to keep it active and stable for several cycles of use and washing [12][13][14]. Different alternatives have been explored in order to overcome this issue.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis variables effect on TiO2/polyester fabrics photoactivity and stability

Velasco

Castro

Giraldo

2016

rev.ion

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TiO 2 -SiO 2 coatings on fabric samples were obtained by immersion of 9cm 2 of commercial polyester in a TiO 2 -SiO 2 suspension. This suspension was prepared by adding TiO 2 P25 to a silica matrix obtained from the hydrolysis of tetraethyl orthosilicate (TEOS). The aim of this work was to study the relationship between the immersion time of the fabric on the photocatalytic activity and stability of the coating against several cycles of use and washing. Obtained samples were characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and infrared spectroscopy (FTIR-ATR). Evaluation of modified fabrics was performed by self-disinfection tests under 250W/m 2 of simulated sunlight using E. coli as model bacteria. In general, all modified fabrics (except that obtained at 2h immersion time) inactivated bacteria in less than 120min and its regrowth was prevented for at least 24h after the disinfection tests. It was determined that low immersion time (3-4h) lead to active and stable fabrics to 3 cycles of use and washing, whereas higher immersion times (12h) lead to more active but unstable fabrics. Keywords: coated fabric, TiO 2 -SiO 2 , photocatalysis, E. coli inactivation. ResumenMuestras de tela recubiertas con TiO 2 -SiO 2 fueron obtenidas por inmersión de un poliéster comercial de 9cm 2 en una suspensión de TiO 2 -SiO 2 . Esta suspensión se preparó adicionando TiO 2 P25 a una matriz de sílice sintetizada mediante la hidrólisis de ortosilicato de tetraetilo (TEOS). El objetivo de este trabajo fue estudiar la relación entre el tiempo de inmersión de la tela, y la actividad fotocatalítica y estabilidad del recubrimiento a varios ciclos de uso y lavado. Las muestras obtenidas fueron caracterizadas por microscopía electrónica de barrido (SEM), espectroscopía de energía dispersiva (EDS) y espectroscopía infrarroja (FTIR-ATR). La evaluación de los textiles se llevó a cabo mediante pruebas de autodesinfección bajo 250W/m 2 de luz solar simulada usando E. coli como microorganismo modelo. En general, todas las telas modificadas (excepto las obtenidas con 2h de inmersión) inactivaron la bacteria en menos de 120min, previniendo su recrecimiento bacteriano al menos por 24h después de las pruebas de desinfección. Se determinó que los tiempos de inmersión bajos (3-4h) dejan telas activas y estables a 3 ciclos de uso y lavado, mientras que tiempos de inmersión más altos (12h) dejan telas más activas pero inestables. ResumoAmostras de tecido revestidas com TiO 2 -SiO 2 foram obtidos por imersão de um poliéster comercial de 9cm 2 em uma suspensão de TiO 2 -SiO 2 . Esta suspensão foi preparada por adição de TiO 2 P25 a uma matriz de sílica sintetizado por hidrólise de ortossilicato de tetraetilo (TEOS). O objetivo deste trabalho foi estudar a relação entre o tempo de imersão do tecido, e a atividade fotocatalítica e a estabilidade do revestimento a vários ciclos de utilização e de lavagem. As amostras obtidas foram caracterizadas por microscopia eletrônica de varredura (MEV), espectroscopia p...

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“…Also, some studies have focused on in situ synthesis method for producing self-cleaning textiles (Poortavasoly et al 2016; Barani and Boroumand 2016;Jiang et al 2011). Potential applications of selfcleaning textiles and fabrics may include wound dressing, medical devices, healthcare, military, protective suits, personal care product, clothing and others (Banerjee et al 2015;Montazer and Pakdel 2011).…”

Section: Introductionmentioning

confidence: 99%

Producing colored cotton fabrics with functional properties by combining silver nanoparticles with nano titanium dioxide

2017

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In this study, functional cotton fabrics were prepared by applying titania as a photocatalyst and using silver nanoparticles as both a novel class of colorant for coloration and an agent capable of modifying the TiO 2 nanoparticles. Silver colloids with different colors were primarily synthesized through reduction of silver nitrate and then coloration of cotton fabrics and synthesis of Ag/TiO 2 nanocomposite on fabric surface was performed by adding titanium dioxide nanoparticles (P25) in an ultrasonic bath. The treated cotton fabrics were characterized by field emission scanning electron microscope, energy-dispersive X-ray spectroscopy, X-ray diffraction and UV-Vis reflectance spectroscopy. The color effect, self-cleaning property, antibacterial efficiency, ultraviolet (UV) blocking activity and hydrophobicity of the samples were also studied. The results indicated that all properties of the treated cotton fabric with Ag/ TiO 2 nanocomposite were superior compared to the treated sample with TiO 2 alone. Moreover, the photocatalytic activity of titanium dioxide has no negative effect on fabric color and the color variation of treated fabric after UV irradiation was negligible.

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Functionality of nano titanium dioxide on textiles with future aspects: Focus on wool

Cited by 159 publications

References 114 publications

Green synthesis of mesoporous anatase TiO₂nanoparticles and their photocatalytic activities

Green synthesis of mesoporous anatase TiO₂nanoparticles and their photocatalytic activities

Synthesis variables effect on TiO2/polyester fabrics photoactivity and stability

Producing colored cotton fabrics with functional properties by combining silver nanoparticles with nano titanium dioxide

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Functionality of nano titanium dioxide on textiles with future aspects: Focus on wool

Cited by 159 publications

References 114 publications

Green synthesis of mesoporous anatase TiO2nanoparticles and their photocatalytic activities

Green synthesis of mesoporous anatase TiO2nanoparticles and their photocatalytic activities

Synthesis variables effect on TiO2/polyester fabrics photoactivity and stability

Producing colored cotton fabrics with functional properties by combining silver nanoparticles with nano titanium dioxide

Contact Info

Product

Resources

About

Green synthesis of mesoporous anatase TiO₂nanoparticles and their photocatalytic activities

Green synthesis of mesoporous anatase TiO₂nanoparticles and their photocatalytic activities