Photo-degradation of methylene blue using Ta-doped ZnO nanoparticle

Kong, Jizhou; Li, Aidong; Li, Xiangyu; Zhai, Haifa; Zhang, Wenqi; Gong, Yue; Li, Hui; Wu, Di

doi:10.1016/j.jssc.2010.04.005

Cited by 155 publications

(66 citation statements)

References 32 publications

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“…There exists an electrostatic interaction between the catalyst surface and the dye molecules which consequently enhances or inhibits the photodegradation rate. The effect of pH value on photocatalysis is generally due to surface charge of the catalyst and the charge on dye molecules (Kong et al 2010). The change in pH shifts the redox potentials of the valence and conduction bands, which might affect the interfacial charge transfer (Jiang et al 2008;Chakrabarti et al 2004).…”

Section: Photocatalytic Activitymentioning

confidence: 99%

Synthesis, characterization and photocatalytic activity of PVP stabilized ZnO and modified ZnO nanostructures

et al. 2013

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In the present study, ZnO nanostructures have been successfully synthesized by hydrothermal, sonochemical and precipitation methods using polyvinyl pyrrolidone (PVP) as the capping agent. The ZnO nanoparticles were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), UV-Visible spectroscopy and photoluminescence (PL) techniques. The XRD results revealed the hexagonal wurtzite structure of the ZnO nanostructures for all the samples. Furthermore, the morphology of the ZnO particles was obtained from FESEM micrographs. Particles prepared by hydrothermal method were found to be rice grain shaped and that prepared by precipitation and sonochemical methods were spherical shaped. Sunlight driven photocatalytic degradation of methylene blue (MB) was studied for ZnO nanostructures synthesized by various methods. The ZnO nanostructures were further decorated with Ag nanoparticles to enhance its dye degradation efficiency. The Ag decorated ZnO nanoparticles exhibited a higher degradation rate as compared to pure ZnO nanoparticles which was independent of pH. Since this process of dye degradation relies on the degradation of dye due to oxidation by highly reactive hydroxyl radicals, there are many factors which affect the efficiency of this process. Hence a study was conducted on the effect of various parameters on ZnO viz amount of catalyst, reaction pH and concentration of MB dye.

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Section: Photocatalytic Activitymentioning

confidence: 99%

Synthesis, characterization and photocatalytic activity of PVP stabilized ZnO and modified ZnO nanostructures

et al. 2013

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“…ZnO, geniş bant aralığına (3.37 eV) sahip, yüksek fotokatalitik aktivite gösteren ve toksik olmayan özelliğe sahip olmakla birlikte, organik kirleticilerin gideriminde ve mikrobiyal sterilizasyonda oldukça etkili bir nano partikül olduğu bilinmektedir [10], [11]. Tekstil endüstrisinde kullanılan boyaların ZnO/UV fotokatalitik oksidasyon prosesi ile giderimi yaygın olarak kullanılan bir yöntemdir [12]- [16].…”

Section: Introductionunclassified

Photocatalytic degradation of methylene blue by waste ZnO catalyst

Çifçi¹

2017

Pamukkale J Eng Sci

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“…Therefore, the development of visiblelight-driven photocatalysts with high energy transfer efficiency has become one of the most challenging tasks in these days. Therefore, a number of efforts have been attracted to inhibit the recombination of electron-hole pairs and improve charge transport via coupling the wide band gap semiconductor photocatalysts with other materials (Li and Wang 2011), such as metal-doped ZnO composite (Kong et al 2010;Mohan et al 2012), polymer modified ZnO composite (Qiu et al 2008), carbon nanotube (CNTs) (Saleh et al 2011) or graphene-ZnO composites Luo et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Enhancement of zinc oxide-mediated solar light decoloration of Acid Yellow 99 dye by addition of β-CD

Pitchaimuthu¹,

Subramanian²,

Kannan³

et al. 2014

Appl Water Sci

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In the current work, the commercially available ZnO photocatalyst was used to investigate the photodecoloration of Acid yellow 99 (AY99) dye under solar light radiation. Promising enhancement of photodecoloration of AY99 dye was also achieved by the addition of b-cyclodextrin (b-CD) with the ZnO (ZnO-b-CD). The effects of process parameters such as initial concentration, pH, catalyst loading, and illumination time on the extent of decoloration were investigated. The optimum catalyst loading was observed at 2.0 g/L. The higher photoactivity of ZnOb-CD/solar light system than ZnO/solar light system can be ascribed due to the ligand to metal charge transfer (LMCT) from b-CD to Zn II . The complexation patterns have been confirmed with UV-visible and FT-IR spectroscopy and the interaction between ZnO and b-CD has been characterized by FE-SEM, powder XRD analysis, and UV-visible diffuse reflectance spectroscopy.

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Photo-degradation of methylene blue using Ta-doped ZnO nanoparticle

Cited by 155 publications

References 32 publications

Synthesis, characterization and photocatalytic activity of PVP stabilized ZnO and modified ZnO nanostructures

Synthesis, characterization and photocatalytic activity of PVP stabilized ZnO and modified ZnO nanostructures

Photocatalytic degradation of methylene blue by waste ZnO catalyst

Enhancement of zinc oxide-mediated solar light decoloration of Acid Yellow 99 dye by addition of β-CD

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