Effect of Zn2Cr layered double hydroxide on photocatalytic hydroxylation of terephthalic acid and photodegradation of sodium diclofenac

Autor(es)

Sotiles, Anne Raquel ; Barbosa, Lorrana Vietro ; Vedovato, Yan Pita ; Wypych, Fernando ; Faria, Emerson Henrique de

• Tipo de documento: Artigo Científico
• Fonte: CATALYSIS TODAY; v. 423, p. 11-pg., 2023-11-01.

Resumo

Titanium dioxide has been widely used in traditional photocatalysis but layered double hydroxides (LDHs) based on Zn/Cr have attracted interest due to their semiconducting properties and tunable bandgap. The typical layered particle morphology of LDHs can result in interesting physicochemical properties, like the properties of traditional bulk semiconductors. The present manuscript describes the synthesis, characterization, and photocatalytic investigation of Zn2Cr LDHs intercalated with Ac-, I-, Br-, F-, Cl- and NO3- . Samples containing SO42-/Na+ were also obtained by coprecipitation at constant and increased pH. The photocatalytic activity was initially investigated using terephthalic acid as a model reaction, and only the LDHs intercalated with SO42-/Na+ could promote the formation of 2-hydroxy terephthalic acid. The two selected photocatalysts intercalated with SO4 2-/ Na+, prepared under different conditions, were investigated regarding photocatalytic degradation of the emerging organic contaminant sodium diclofenac. Promising results were obtained specially after the recycling of the photocatalysts, which kept almost the same catalytic activity after six cycles of use. (AU)

• Processo FAPESP: 17/15482-1 - Novas estratégias para o reaproveitamento de subprodutos de curtumes para a obtenção de materiais porosos funcionais de alto valor agregado
• Beneficiário: Emerson Henrique de Faria
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• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 98/11022-3 - Oxidacao catalitica biomimetica.
• Beneficiário: Katia Jorge Ciuffi Pires
• Modalidade de apoio: Auxílio à Pesquisa - Regular