Obtaining Porous Zinc Oxide Ceramics Using Replica Technique: Application in Photocatalysis

This research investigated the production of porous zinc oxide (ZnO) ceramics obtained by the replica method for water depollution by photocatalytic processes. Five photo-decolorization cycles were performed to analyze the reuse potential of the ceramics. Statistical analyses using R programming wer...

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Bibliographic Details
Published in:Materials research (São Carlos, São Paulo, Brazil) São Paulo, Brazil), 2022-01, Vol.25, p.1
Main Authors: Faria, Felipe P., Ruellas, Thamara M. O., Roveri, Carolina Del, Malafatti, João Otávio Donizette, Paris, Elaine Cristina, Giraldi, Tânia R., Maestrelli, Sylma C.
Format: Article
Language:English
Subjects:
Advanced Oxidation Processes
Ceramic processing
Ceramic tools
Ceramics
Decoloring
Dyes
ENGINEERING, CHEMICAL
Heat treatment
MATERIALS SCIENCE, MULTIDISCIPLINARY
METALLURGY & METALLURGICAL ENGINEERING
Multivariate analysis
Photocatalysis
Porosity
Rhodamine B
Slurries
Statistical analysis
Zinc oxide
Zinc oxides
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Summary:This research investigated the production of porous zinc oxide (ZnO) ceramics obtained by the replica method for water depollution by photocatalytic processes. Five photo-decolorization cycles were performed to analyze the reuse potential of the ceramics. Statistical analyses using R programming were conducted to investigate possible significant differences between them. The ceramics porosities were between 46.74 and 62.50% (depending on the composition). The most successful results were achieved in prepared ceramics from slurries containing 65% ZnO and 1% carboxymethylcellulose, in which the dye decolorization results reached 90.5% after 5 cycles, indicating a high reuse potential of these ceramics. Multivariate analysis proved the negative effect of increasing the heat treatment temperature on the evaluated properties. The best processing conditions to obtain porous ZnO ceramics by the replica technique were established through statistical tools, with very satisfactory results in the photo-decolorization potential of the investigated dye.
ISSN:1516-1439
1980-5373
1980-5373
DOI:10.1590/1980-5373-MR-2021-0083