Synthesis and characterization of ZnO nanorod films for photocatalytic disinfection of contaminated water

Rodríguez, Juan; Paraguay‐Delgado, F.; López, Antonio Fernández; Alarcón, Julio; Estrada, Walter

doi:10.1016/j.tsf.2010.08.139

Cited by 39 publications

(26 citation statements)

References 37 publications

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“…Extensive research on zinc oxide (ZnO) reveals a gamut of functionalities such as antifungal properties [2], photocatalysis [3] and UV light absorption [4]. Sawai et al [5] reported antibacterial properties of ZnO particles against Escherichia coli bacteria.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional ZnO/Nylon 6 nanofiber mats by an electrospinning–electrospraying hybrid process for use in protective applications

Vitchuli

Shi

Nowak

et al. 2011

Science and Technology of Advanced Materials

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ZnO/Nylon 6 nanofiber mats were prepared by an electrospinning-electrospraying hybrid process in which ZnO nanoparticles were dispersed on the surface of Nylon 6 nanofibers without becoming completely embedded. The prepared ZnO/Nylon 6 nanofiber mats were evaluated for their abilities to kill bacteria or inhibit their growth and to catalytically detoxify chemicals. Results showed that these ZnO/Nylon 6 nanofiber mats had excellent antibacterial efficiency (99.99%) against both the Gram-negative Escherichia coli and Gram-positive Bacillus cereus bacteria. In addition, they exhibited good detoxifying efficiency (95%) against paraoxon, a simulant of highly toxic chemicals. ZnO/Nylon 6 nanofiber mats were also deposited onto nylon/cotton woven fabrics and the nanofiber mats did not significantly affect the moisture vapor transmission rates and air permeability values of the fabrics. Therefore, ZnO/Nylon 6 nanofiber mats prepared by the electrospinning-electrospraying hybrid process are promising material candidates for protective applications.

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Section: Introductionmentioning

confidence: 99%

Multifunctional ZnO/Nylon 6 nanofiber mats by an electrospinning–electrospraying hybrid process for use in protective applications

Vitchuli

Shi

Nowak

et al. 2011

Science and Technology of Advanced Materials

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“…The highest microbial immobilization efficiency has been reported for 1 mg/mL of the catalyst loading (Cho et al 2004). Zinc oxide (ZnO) with a bulk band gap of *3.37 eV also exhibits good photocatalytic microbicidal effects (Karunakaran et al 2011;Khalil et al 2011;Rodriguez et al 2010;Sapkota et al 2011). Its advantage over TiO 2 is that ZnO exhibits significantly higher photocatalytic activity under visible light irradiation (Baruah et al 2008).…”

Section: Photocatalytic Disinfectantsmentioning

confidence: 99%

“…This results in loss of surface area of the nanoparticulate photocatalyst that affects its photocatalytic efficiency. However, growth of the photocatalyst film in the form nanorod arrays has been shown to effectively obviate the problem (Rodriguez et al 2010;Sapkota et al 2011). …”

Section: Efficiency Enhancementmentioning

confidence: 99%

Heterogeneous photocatalysis for removal of microbes from water

et al. 2011

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Increasing water pollution by microbes has become a source of serious health concern across the globe. Production of potentially carcinogenic disinfection byproducts has marred credibility of traditional water purification techniques like chlorination. Photocatalysis has emerged as a promising alternative technique for the disinfection of water with minimal risk of harmful by-products. The process involves a wide band gap semiconductor material which, upon irradiation of light, produces electrons and holes with high redox potential to degrade organic contaminants and microbes. In this review, we analyze the research trends in photocatalytic inactivation of water borne microorganisms. This report analyzes the major factors that affect the disinfection efficiency using this process. The discussion also includes plausible mechanisms of microbial degradation as well as a kinetic model of the inactivation process. Different approaches, like doping of semiconductors or energy band engineering or plasmon coupling, have been reported for the enhancement and utilization of ambient solar light. Photocatalysis could be a cost-effective and environmentally friendly water purification technique though further research is required to enhance its efficiency with the use of solar light.

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“…The literature is not conclusive in establishing a relationship among the synthesis parameters, morphological properties and photocatalytic activity of ZnO particles. Rezapour and Talebian [15] discuss the influence of different solvents used in ZnO solegel synthesis on the degradation of phenol, and Rodríguez et al [16] describe the growth of ZnO thin films in a solution of zinc nitrate and their bactericidal effect on Escherichia coli as a function of the pH of the ZnNO 3 solution. However, the effect of counterions on this property of ZnO is little discussed in the literature [14].…”

Section: Introductionmentioning

confidence: 99%

Effect of synthesis parameters on the structural characteristics and photocatalytic activity of ZnO

Giraldi

Santos²,

Mendonça

et al. 2012

Materials Chemistry and Physics

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Synthesis and characterization of ZnO nanorod films for photocatalytic disinfection of contaminated water

Cited by 39 publications

References 37 publications

Multifunctional ZnO/Nylon 6 nanofiber mats by an electrospinning–electrospraying hybrid process for use in protective applications

Multifunctional ZnO/Nylon 6 nanofiber mats by an electrospinning–electrospraying hybrid process for use in protective applications

Heterogeneous photocatalysis for removal of microbes from water

Effect of synthesis parameters on the structural characteristics and photocatalytic activity of ZnO

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