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      Photocatalytic degradation of 1,4-benzoquinone in aqueous ZnO dispersions

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          Abstract

          The present paper reports the UV-assisted degradation of 1,4-benzoquinone in ZnO suspensions. The variables studied include the concentration of 1,4-benzoquinone, photocatalyst, pH and the total organic carbon. The concentration of 1,4-benzoquinone and residue organic carbon were measured using UV-Visible spectrophotometer and TOC analyzer, respectively. The results showed that 1,4-benzoquinone photodegradation was independent of pH. The photoactivity of ZnO was maximum at 1.0 g L-1 concentration and at 100 mg L-1 1,4-benzoquinone levels. Within pH 4-10 more than 80% of 1,4-benzoquinone can be removed. ZnO has demonstrated reusability in the process.

          Translated abstract

          O presente artigo relata a degradação UV-assistida de 1,4-benzoquinona em suspensões ZnO. As variáveis estudadas incluem a concentração de 1,4-benzoquinona, fotocatalisador, pH e carbono orgânico total. A concentração de 1,4-benzoquinona e o carbono orgânico residual foram medidos usando espectrofotômetro UV-Visível e analisador TOC, respectivamente. Os resultados mostraram que a fotodegradação da 1,4-benzoquinona foi independente do pH. A fotoatividade do ZnO foi máxima na concentração de 1,0 g L-1 e em níveis de 100 mg L-1 de 1,4-benzoquinona. Na faixa de pH 4-10 mais de 80% de 1,4-benzoquinona pode ser removida. ZnO demonstrou capacidade de reutilização no processo.

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          Solid State Physics

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            Author and article information

            Journal
            jbchs
            Journal of the Brazilian Chemical Society
            J. Braz. Chem. Soc.
            Sociedade Brasileira de Química (São Paulo, SP, Brazil )
            0103-5053
            1678-4790
            February 2012
            : 23
            : 2
            : 236-240
            Affiliations
            [02] Selangor D. E. orgnameUniversiti Putra Malaysia orgdiv1Faculty of Science orgdiv2Department of Chemistry Malaysia
            [01] Selangor D. E. orgnameUniversiti Putra Malaysia orgdiv1Institute of Advanced Technology orgdiv2Advanced Materials and Nanotechnology Laboratory Malaysia
            Article
            S0103-50532012000200007 S0103-5053(12)02300200007
            10.1590/S0103-50532012000200007
            0ecfd640-0d47-49b9-a399-1f19fa913b83

            This work is licensed under a Creative Commons Attribution 4.0 International License.

            History
            : 23 July 2011
            : 22 November 2011
            Page count
            Figures: 0, Tables: 0, Equations: 0, References: 32, Pages: 5
            Product

            SciELO Brazil

            Categories
            Articles

            mineralization,ZnO,photocatalytic degradation,benzoquinone

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