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首页> 外文期刊>Indian Journal of Chemistry, Section A. Inorganic, Physical, Theoretical & Analytical >Visible light induced heterogeneous advanced oxidation process to degrade pararosanilin dye in aqueous suspension of ZnO
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Visible light induced heterogeneous advanced oxidation process to degrade pararosanilin dye in aqueous suspension of ZnO

机译：可见光诱导的异质高级氧化过程降解ZnO水性悬浮液中的副玫瑰红素染料

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摘要

The photocatalytic degradation of pararosanilin dye has been investigated under visible light in the presence of aqueous suspension of ZnO under different conditions. The reaction has been studied by monitoring the change in substrate concentration employing visible spectrophotometric analysis as a function of time. The absorbance of dye under investigation is found to decrease in the presence of ZnO and visible irradiation. The degradation of selected dye has been studied under different process variables such as reaction pH, catalyst loading, substrate concentration, light intensity and presence of electron acceptors, and hydroxyl radical scavengers. The rate degradation was strongly influenced by all the above-mentioned parameters. The estimated COD and CO2 values of treated dye sample indicate complete degradation of dye. A' slight decrease in pH and gradual increase in conductivity has also been observed during the degradation process. ZnO has been found to be potentially efficient in solar irradiation for the degradation of dye. Kinetic analysis indicates the complex nature of heterogeneous photocatalytic process.
机译：在可见光下，在不同条件下，在ZnO的水悬浮液存在下，已经研究了对伞花红素染料的光催化降解。通过使用可见光分光光度法分析底物浓度的变化作为时间的函数来研究反应。发现在ZnO和可见光照射下，所研究染料的吸光度降低。已经在不同的过程变量下研究了所选染料的降解，这些变量包括反应pH，催化剂负载，底物浓度，光强度和电子受体的存在以及羟基自由基清除剂。速率下降受到所有上述参数的强烈影响。处理过的染料样品的估计COD和CO2值表明染料已完全降解。在降解过程中，还发现pH值略有下降，电导率逐渐增加。已经发现ZnO在太阳辐射下可能有效地用于染料的降解。动力学分析表明非均相光催化过程的复杂性质。

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