2012
DOI: 10.1590/s0103-50532012000200007
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Photocatalytic degradation of 1,4-benzoquinone in aqueous ZnO dispersions

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 níve… Show more

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Cited by 45 publications
(11 citation statements)
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“…This result can be attributed to the influence of the size of the nanoparticles; as the size decreased the effective surface increased, prompting an increase in activity [12][13][14]. The XRD results show that the size of FeZnO was less than that for CuZnO, which was smaller than ZnO.…”
Section: Influence Of Doped Metal Cationsmentioning
confidence: 99%
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“…This result can be attributed to the influence of the size of the nanoparticles; as the size decreased the effective surface increased, prompting an increase in activity [12][13][14]. The XRD results show that the size of FeZnO was less than that for CuZnO, which was smaller than ZnO.…”
Section: Influence Of Doped Metal Cationsmentioning
confidence: 99%
“…The current interest in ZnO is based on its high spectral response in both UV and visible regions which has been shown to result in much higher efficiency than for TiO 2 for photocatalytic degradation [12]. ZnO photocatalysis has been proposed as an alternative to TiO 2 for the removal of aqueous pollutants, including phenolic compounds [12].…”
Section: Introductionmentioning
confidence: 99%
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“…As such, numerous adsorbents have been developed for removing inorganic contaminants (e.g., heavy metals, arsenic and fluoride) and organic contami-nants (e.g., dyes) from water. On the other hand, to evaluate the removal efficiency of contaminant degradation from aqueous medium, electrochemical sensors as a new approach developed which is relatively cheaper compared to the other common analytical methods such as atomic absorption spectroscopy (AAS), inductively coupled plasma optical emission and mass spectroscopy (ICP-OES and ICP-MS) and ion chromatography (IC) and applied widely as sensitive diagnostic tools recently [3][4][5][6][7][8][9][10].…”
Section: Introductionmentioning
confidence: 99%
“…The species are converted to hydroxyl radicals by further oxidation [16,17]. The AOPs usually use TiO 2 and ZnO as photocatalysts to degrade the organics to CO 2 and H 2 O that are environmental friendly products [15,[18][19][20]. However, the inexpensive ZnO photodegrades a broad range of organic compounds in acidic and basic medium as an excellent alternative for TiO 2 [21][22][23][24].…”
Section: Introductionmentioning
confidence: 99%