Formation and characterization of ZnO nanopowder synthesized by sol–gel method

Azam, Ameer; Ahmed, Faheem; Arshi, Nishat; Chaman, M.; Naqvi, Andleeb Z.

doi:10.1016/j.jallcom.2010.02.028

Cited by 106 publications

(44 citation statements)

References 34 publications

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“…This behavior was also observed in other studies, such as Nascimento et al 35 .Most of the particles had dimensions in the order of 40 nm, according to the histogram of particle size distribution represented by Figure 4A. In the study of Azam et al 36 , ZnO SG particles presented almost spherical shape and agglomeration, with diameters of about 20 nm. Arshad et al…”

Section: Characterizationsupporting

confidence: 83%

Evaluation of the Photocatalytic Potential of TiO2 and ZnO Obtained by Different Wet Chemical Methods

et al. 2017

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This paper describes the development of TiO 2 and ZnO particles by a chemical route, using two different wet synthesis methods: polymeric precursor (PP) and sol-gel (SG). This study aimed to shed a light on how the synthesis method affects the photocatalytic activity of these oxides. Rhodamine B (RhB) degradation was used as a probe reaction to test the as-synthesized TiO 2 and ZnO photoactivity. It was observed that surface availability, which is related to the presence of synthesis residue, is the key parameter to determine photoactivity. ZnO PP and ZnO SG presented degradation of 88% to RhB. Both samples presented synthesis residue on the surface. On the other hand, TiO 2 PP presented a better performance than TiO 2 SG, once 90% of RhB was degraded, while TiO 2 SG degraded 80% of the dye. In this case, TiO 2 PP was free of synthesis residue on the surface, while TiO 2 SG presented residues.

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Section: Characterizationsupporting

confidence: 83%

Evaluation of the Photocatalytic Potential of TiO2 and ZnO Obtained by Different Wet Chemical Methods

et al. 2017

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“…[20][21][22] The antibacterial effect of metal NPs has been attributed to their small size and large surface area, which allow them to penetrate bacterial cell walls and membranes, and as a result, the antimicrobial effect is directly dependent on the size and shape of the NPs. [23,24] In contrast to Ag nanoparticles (Ag NPs), which are used extensively as the most common antimicrobial agent in consumer and medical products, there is only a limited number of reports on the antimicrobial activity of Au NPs.…”

Section: Introductionmentioning

confidence: 99%

Reduced Graphene Oxide Nanosheets Decorated with Au Nanoparticles as an Effective Bactericide: Investigation of Biocompatibility and Leakage of Sugars and Proteins

et al. 2014

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An efficient and simple method for selective oxidation of secondary alcohols and oxidation of alkanes to ketones is reported. An in situ prepared catalyst is employed based on manganese(II) salts, pyridine‐2‐carboxylic acid, and butanedione, which provides good‐to‐excellent conversions and yields with high turnover numbers (up to 10 000) with H2O2 as oxidant at ambient temperatures. In substrates bearing multiple alcohol groups, secondary alcohols are converted to ketones selectively and, in general, benzyl CH oxidation proceeds in preference to aliphatic CH oxidation.

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“…It is clear from Figure 1 that the XRD peaks positions are very well matched with the standard PDF values (JCPDS, 36-1451). It is also seen from the figure that the relative intensities of these peaks are different from those of ZnO nanopowder, 23 as shown in the inset of Figure 1. On the basis of the XRD results, we can conclude that the prepared nanorod arrays are highly crystalline, having wurtzite structure with preferable c-axis orientation.…”

Section: Resultsmentioning

confidence: 90%

Low-temperature growth of well-aligned zinc oxide nanorod arrays on silicon substrate and their photocatalytic application

Azam¹,

Babkair²

2014

IJN

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Well-aligned and single-crystalline zinc oxide (ZnO) nanorod arrays were grown on silicon (Si) substrate using a wet chemical route for the photodegradation of organic dyes. Structural analysis using X-ray diffraction, high-resolution transmission electron microscopy, and selected area electron diffraction confirmed the formation of ZnO nanorods grown preferentially oriented in the (001) direction and with a single phase nature with a wurtzite structure. Field emission scanning electron microscopy and transmission electron microscopy micrographs showed that the length and diameter of the well-aligned rods were about ~350–400 nm and ~80–90 nm, respectively. Raman scattering spectra of ZnO nanorod arrays revealed the characteristic E 2 (high) mode that is related to the vibration of oxygen atoms in the wurtzite ZnO. The photodegradation of methylene blue (MB) using ZnO nanorod arrays was performed under ultraviolet light irradiation. The results of photodegradation showed that ZnO nanorod arrays were capable of degrading ~80% of MB within 60 minutes of irradiation, whereas ~92% of degradation was achieved in 120 minutes. Complete degradation of MB was observed after 270 minutes of irradiation time. Owing to enhanced photocatalytic degradation efficiency and low-temperature growth method, prepared ZnO nanorod arrays may open up the possibility for the successful utilization of ZnO nanorod arrays as a future photocatalyst for environmental remediation.

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Formation and characterization of ZnO nanopowder synthesized by sol–gel method

Cited by 106 publications

References 34 publications

Evaluation of the Photocatalytic Potential of TiO2 and ZnO Obtained by Different Wet Chemical Methods

Evaluation of the Photocatalytic Potential of TiO2 and ZnO Obtained by Different Wet Chemical Methods

Reduced Graphene Oxide Nanosheets Decorated with Au Nanoparticles as an Effective Bactericide: Investigation of Biocompatibility and Leakage of Sugars and Proteins

Low-temperature growth of well-aligned zinc oxide nanorod arrays on silicon substrate and their photocatalytic application

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