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

Giraldi, Tania R.; Santos, G. V. F.; Mendonça, Vagner R. de; Ribeiro, Cauê; Weber, Ingrid Távora

doi:10.1016/j.matchemphys.2012.07.018

Cited by 43 publications

(28 citation statements)

References 29 publications

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“…Besides the effect of surface area, impurities incorporated in the ZnO nanoparticles could also contribute to the limited photocatalytic activity. Giraldi et al (2012) suggest that impurities adsorbed on the surface of nanoparticles might occupy the adsorption sites which are otherwise designated for photocatalytic reactive sites. It is therefore expected that ZnO 1:3 would offer better photoactivity than ZnO 1:2, because the former has fewer impurities on its surface, as shown in Table 4.…”

Section: Fesem-edx Analysis Resultsmentioning

confidence: 99%

Synthesis of Zno Nanoparticles and their Nanofluid Stability in the Presence of a Palm Oil-Based Primary Alkyl Sulphate Surfactant for Detergent Application

Adiwibowo

Ibadurrohman

Slamet³

2018

IJTech

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ZnO nanoparticles were successfully synthesized by a solochemical method using zinc chloride as the precursor in a sodium hydroxide solution with ZnCl2:NaOH ratios of 1:2 and 1:3. The effects of the thermal treatment on the functionalities of the nanoparticles were investigated by comparing calcined ZnO with uncalcined ZnO. Calcined ZnO underwent a drying process at 120°C, followed by calcination at 500°C, while uncalcined ZnO underwent the drying process only. The synthesized nanoparticles were characterized by XRD and FESEM-EDX analysis. The photoactivity of synthesized ZnO was evaluated through methylene blue degradation. In addition, ZnO nanofluids were synthesized by dispersing nanoparticles into the base fluid. The nanofluidic stability in the presence of a Palm Oil-Based Primary Alkyl Sulphate (palmPAS) surfactant were investigated using a spectrophotometer UV-vis with varied PalmPAS concentrations. XRD and FESEM analysis showed that the nanoparticles exhibited a hexagonal wurtzite structure, and confirmed that the particle size increased on calcination. All the synthesized ZnO nanoparticles exhibited good photoactivity under UV light irradiation due, to some extent, to their good crystallinity. The calcined ZnO from the ZnCl2:NaOH ratio of 1:3 offered the best photocatalytic performance compared to its ZnO counterparts. It was also found that the nanofluids of uncalcined ZnO from the ZnCl2:NaOH ratio of 1:3, at a ZnO:palmPAS ratio of 1:9, offered the best stability.

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Section: Fesem-edx Analysis Resultsmentioning

confidence: 99%

Synthesis of Zno Nanoparticles and their Nanofluid Stability in the Presence of a Palm Oil-Based Primary Alkyl Sulphate Surfactant for Detergent Application

Adiwibowo

Ibadurrohman

Slamet³

2018

IJTech

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“…Nanoparticulate ZnO is one of the most researched oxides due to its differentiated physical, chemical and biological properties. Its low cost, versatility and availability make it highly suitable for numerous industrial applications (Giraldi, et al, 2012). According to the literature, ZnO nanoparticles can be synthesized by different techniques, such as hydrothermal…”

Section: Zno Nanoparticles (Zno Nano)mentioning

confidence: 99%

Zinc Oxide: Development of novel products for weaned piglets

Barreto

Conté-Júnior

2018

Preprint

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Diarrhea in piglets is one of the main causes of animal death before and after weaning; In recent decades, zinc oxide has been used in high doses to control this disease. These doses are considered to be of concern for the pollutant potential of animal waste through soil and groundwater pollution. New technologies such as nanotechnology, new matrices such as biopolymers and encapsulation are suggestions that appear as possible innovations that can minimize the challenges imposed by piglet weaning. This review aims to collect and analyze information on novel zinc oxide products developed with innovative technologies.

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“…In addition, the results obtained by FTIR ( Figure 5A) show that both samples have residues of synthesis adsorbed on their surface. These residues can compete with the active sites of the photocatalyst 43 , and then impair the photocatalysis efficiency. Thus, although photocatalytic efficiency was significant, it could have been even better if the surface of the particles were free of residues of synthesis.…”

Section: Photocatalysismentioning

confidence: 99%

“…The presence of adsorbed species on the surface of the particles may influence their growth, since these species, due to steric hindrance, may prevent a greater contact between the particles and, consequently, they may have their growth prevented 43 , resulting in a smaller particle size and larger surface area. This fact can be evidenced in the sample TiO 2 PP, which presented residual organic group in the FTIR spectrum (1380 cm -1 ) at the same time that it exhibited smaller particle size and larger surface area than TiO 2 SG.…”

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confidence: 99%

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

Cited by 43 publications

References 29 publications

Synthesis of Zno Nanoparticles and their Nanofluid Stability in the Presence of a Palm Oil-Based Primary Alkyl Sulphate Surfactant for Detergent Application

Synthesis of Zno Nanoparticles and their Nanofluid Stability in the Presence of a Palm Oil-Based Primary Alkyl Sulphate Surfactant for Detergent Application

Zinc Oxide: Development of novel products for weaned piglets

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

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