Zinc oxide pieces obtained by pressing and slip casting: physical, structural and photocatalytic properties

Ruellas, Thamara Machado de Oliveira; Peçanha, L. O. O.; Domingos, G. H. S.; Sciena, C. R.; Malafatti, João Otávio Donizette; Paris, E. C.; Maestrelli, Sylma Carvalho; Giraldi, Tania R.

doi:10.1080/09593330.2019.1683078

Cited by 13 publications

(13 citation statements)

References 36 publications

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“…A control beaker was also prepared, containing only the RhB solution. The beakers were then placed in a reactor composed of 4 UV‐C 37 lamps, with a water‐cooling system composed of copper coils and maintained at a temperature of 10°C. The process started with a period of 1 h in a darkroom; then, the lamps were lit and the absorbance values (Agilent Technologies, Spectrophotometer Cary 60) were measured at the elapsed times of 0, 15, 30, 45, 60, 90, and 120 min.…”

Section: Methodsmentioning

confidence: 99%

“…However, after its use, it is necessary to apply complex procedures to separate the semiconductors, which generates additional costs to the catalytic process and an increase in wastewater treatment time. 29 The preparation and use, in photocatalysis, of immobilized semiconductors, [30][31][32][33][34][35][36][37][38] that is, in the form of thin films [39][40][41][42] or ceramic pieces, is advantageous, since the removal of the catalyst from the reaction medium is facilitated, in addition to the possibility of its reuse in other reaction cycles, thus ensuring greater financial viability in an industrial aspect.…”

Section: Domingos Et Almentioning

confidence: 99%

“…The obtaining of immobilized photocatalysts can be accomplished by several ceramic conformation techniques. 36,37 However, methods in which high porosity samples are obtained should always be prioritized, 42 in order to obtain a high surface area and greater efficiency in the process of contaminant degradation. In addition, immobilization makes it possible to obtain pieces with a certain mechanical resistance, which enables the reuse of the semiconductor in several degradation cycles.…”

Section: Domingos Et Almentioning

confidence: 99%

“…The preparation and use, in photocatalysis, of immobilized semiconductors, 30–38 that is, in the form of thin films 39–42 or ceramic pieces, is advantageous, since the removal of the catalyst from the reaction medium is facilitated, in addition to the possibility of its reuse in other reaction cycles, thus ensuring greater financial viability in an industrial aspect.…”

Section: Introductionmentioning

confidence: 99%

“…The obtaining of immobilized photocatalysts can be accomplished by several ceramic conformation techniques 36,37 . However, methods in which high porosity samples are obtained should always be prioritized, 42 in order to obtain a high surface area and greater efficiency in the process of contaminant degradation.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

ZnO semiconductors obtained by slip casting: Application and reuse in photocatalysis

Domingos

Ruellas

Peçanha

et al. 2021

Int J Applied Ceramic Tech

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With industrial and technological advances, it has been increasingly possible to raise the production capacity of essential items for various activities, in addition to promoting comfort and safety for people. However, human actions cause society to face several environmental problems, which are increasingly the target of global concern in all areas, especially in the scientific community. Among these problems is the high and constant worldwide use of dyes, mostly associated with the textile industry, since the demand for clean water is high, 1,2 mainly in the dyeing stage,

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Section: Methodsmentioning

confidence: 99%

Section: Domingos Et Almentioning

confidence: 99%

Section: Domingos Et Almentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

ZnO semiconductors obtained by slip casting: Application and reuse in photocatalysis

Domingos

Ruellas

Peçanha

et al. 2021

Int J Applied Ceramic Tech

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Biodegradable Starch Sachets Reinforced with Montmorillonite for Packing ZnO Nanoparticles: Solubility and Zn2+ Ions Release

et al. 2023

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Agriculture's importance in human lives and the economy has directed studies to improve crop production. An essential challenge for improving fertilizer e cacy is reducing losses due to leaching and increasing the nutrients supplies. In this context, biodegradable sachets stand out as internal packaging instead of direct insertion into the polymer matrix, facilitating the system processing and making it easier to adapt the soil's nutritional quantity. Thus, the present work aimed to increase the zinc oxide (ZnO) solubility by obtaining nanoparticles using top-down and bottom-up approaches and packaging them in montmorillonite (MMT) reinforced starch sachets. The different diameters and forms of the ZnO nanoparticles were evaluated to understand the solubility dependence on these parameters. In this way, the top-down process was performed for the attritor milling method allowing the nanoparticles with about 71 nm average diameter and greater homogeneity than the commercial one (approximately 174 nm). The milled ZnO nanoparticles presented better solubility than those synthesized bottom-up processes and the commercial ones, reaching a 90 to 100% solubility plateau in 48 h. Concerning starch sachets, the 1% MMT (w w − 1 ) insertion in the polymeric matrix promoted increased water vapor barrier and mechanical properties, improving the tensile strength. In the solubility test for nanoparticulate ZnO packed in sachets, similar behaviors to free ZnO were observed due to the high a nity of the starch matrix with water.Therefore, starch sachet systems with improved properties from the MMT reinforcement insertion showed as an alternative source of Zn 2+ ions to minimize losses during application.

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Nb2O5 nanoparticles decorated with magnetic ferrites for wastewater photocatalytic remediation

Paris

Malafatti

Sciena

et al. 2020

Environ Sci Pollut Res

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Zinc oxide pieces obtained by pressing and slip casting: physical, structural and photocatalytic properties

Cited by 13 publications

References 36 publications

ZnO semiconductors obtained by slip casting: Application and reuse in photocatalysis

ZnO semiconductors obtained by slip casting: Application and reuse in photocatalysis

Biodegradable Starch Sachets Reinforced with Montmorillonite for Packing ZnO Nanoparticles: Solubility and Zn2+ Ions Release

Nb2O5 nanoparticles decorated with magnetic ferrites for wastewater photocatalytic remediation

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