Physico-chemical characterization and photocatalytic activity of zinc oxide prepared by various methods

Parida, Kulamani; Dash, S.S.; Das, D.P.

doi:10.1016/j.jcis.2005.12.053

Cited by 145 publications

(46 citation statements)

References 40 publications

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“…Surface areas of the samples synthesized without lysozyme (calcined C1-DW and C2-DW) were measured as quite low (~3 m 2 /g). Similarly, in the absence of any additive, the precipitation products of zinc acetate and zinc chloride with NaOH also exhibited low surface areas, 1 and 6 m 2 /g, respectively [47]. The highest surface area values (~8e10 m 2 /g) were obtained for calcined R2-DW and R3-DW likely due to their high lysozyme contents.…”

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confidence: 95%

Zinc oxide and zinc hydroxide formation via aqueous precipitation: Effect of the preparation route and lysozyme addition

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Çetinkaya

2015

Materials Chemistry and Physics

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h i g h l i g h t s g r a p h i c a l a b s t r a c tAqueous precipitation products of Zn(NO 3 ) 2 and NaOH were prepared. Synthesis route and lysozyme addition affected morphology of the products. Aqueous precipitation products of Zn(NO 3 ) 2 and NaOH obtained by changing the method of combining the reactants and by using lysozyme as an additive were investigated. In the case of single addition method, octahedral ε-Zn(OH) 2 and plate-like b-Zn(OH) 2 structures formed in the absence and in the presence of lysozyme, respectively. Calcination of these Zn(OH) 2 samples at 700 C yielded porous ZnO structures by conserving the template crystals. When zinc source was added dropwise into NaOH solution, predominantly clover-like ZnO crystals were obtained independent of lysozyme addition. Mixed spherical and elongated ZnO morphology was observed when NaOH was added dropwise into Zn(NO 3 ) 2 solution containing lysozyme. Lysozyme contents of the precipitation products were estimated as in the range of~5e20% and FTIR indicated no significant conformational change of lysozyme in the composite. These results suggest that lysozyme-ZnO/Zn(OH) 2 composite materials may have a value as an antibacterial material.

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confidence: 95%

Zinc oxide and zinc hydroxide formation via aqueous precipitation: Effect of the preparation route and lysozyme addition

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Çetinkaya

2015

Materials Chemistry and Physics

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“…Besides, ZnO has an excellent thermal stability at room temperature (Li et al 2005) and it is available at low cost. Due to versatile characteristic and studies by others researchers (Li et al 2005;Pardeshi & Patil 2008;Parida et al 2006;Sakthivel et al 2003;Tsay et al 2010) ZnO is considered as a suitable semiconductor for the photocatalytic process.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photodegradation of Phenol by ZnO Nanoparticles Synthesized through Sol-gel Method

Yusoff¹,

Ho²,

Ong³

et al. 2017

JSM

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“…The photocatalytic activity of semiconductor depends upon the crystallinity, surface area and particle morphology. Among these factors, crystallinity and surface area which depend on the method of preparation are regarded as important factors for determining photocatalysis (Parida et al, 2006). Inorganic nanoparticles are also very easy to agglomerate in media.…”

Section: Introductionmentioning

confidence: 99%

Photo-catalytic Removal of Methyl Orange Dye by Polyaniline Modified ZnO using Visible Radiation

Melaku¹,

Yadav²,

Kebede³

2014

Sci. Technol. Arts Res. J.

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Article InformationPolyaniline modified zinc oxide (PANI/ZnO) nanocomposite was synthesized by in-situ polymerization process. The as-synthesized nano-ZnO, PANI and PANI/ZnO nanocomposite were characterized by X-ray diffraction (XRD), FT-IR, and UV-Vis spectroscopy. The UV-visible spectroscopy studies showed that the absorption peak for PANI/ZnO nanocomposite has a red shift toward visible wavelengths compared with the ZnO nanoparticles and PANI. Photocatalytic efficiency of PANI/ZnO nanocomposite was investigated for the degradation of methyl orange (MeO) dye as a model organic compound under Visible light irradiation. The photocatalytic activities of ZnO, PANI and PANI/ZnO nanocomposite were studied. The results showed that ZnO/PANI nanocomposite had greater photocatalytic activity than ZnO nanoparticles and PANI under visible light irradiation. According to these results, application of PANI as a shell on the surface of ZnO nanoparticles causes the enhanced photocatalytic activity of the PANI/ZnO nanocomposite. Influence of some operational parameters such as: amount of photocatalyst, pH of solution, and MeO dye initial concentration on the photodegradation reaction rate was investigated.The optimum values of pH and catalyst dose found to be 6 and 1.50 gmL -1 respectively. It was demonstrated that the photocatalytic degradation of MeO follows pseudo first-order kinetics. The PANI/ZnO nanocomposite photocatalysts have good photocatalytic stability and can be reused three times with only gradual loss of activity. Thus, the PANI/ZnO nanocomposites are efficient photocatalytic materials for degrading contaminated colored wastewater for reuse in textile industries under mild conditions.

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Physico-chemical characterization and photocatalytic activity of zinc oxide prepared by various methods

Cited by 145 publications

References 40 publications

Zinc oxide and zinc hydroxide formation via aqueous precipitation: Effect of the preparation route and lysozyme addition

Zinc oxide and zinc hydroxide formation via aqueous precipitation: Effect of the preparation route and lysozyme addition

Enhanced Photodegradation of Phenol by ZnO Nanoparticles Synthesized through Sol-gel Method

Photo-catalytic Removal of Methyl Orange Dye by Polyaniline Modified ZnO using Visible Radiation

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