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首页> 外文期刊>Journal of Photochemistry and Photobiology, A. Chemistry >Photocatalytic degradation of a textile azo dye, Sirius Gelb GC on TiO_2 or Ag-TiO_2 particles in the absence and presence of UV irradiation: the effects of some inorganic anions on the photocatalysis
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Photocatalytic degradation of a textile azo dye, Sirius Gelb GC on TiO_2 or Ag-TiO_2 particles in the absence and presence of UV irradiation: the effects of some inorganic anions on the photocatalysis

机译：在不存在和存在紫外线照射下，纺织品偶氮染料Sirius Gelb GC在TiO_2或Ag-TiO_2颗粒上的光催化降解：某些无机阴离子对光催化的影响

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摘要

The aqueous phase photocatalytic degradation of Sirius Gelb GC used in the textile industry, was investigated. In order to optimize the working pH, three different dye solutions were prepared at pH 3.5; 7.0 and 11.0. One hundred cubic centimeter portions of the solution were irradiated with a low pressure UV lamb in the absence and presence of catalysts TiO_2 or Ag loaded-TiO_2. In all conditions, the samples withdrawn from the reactor were centrifuged and separated from the catalyst and degradation percentages were calculated from the measurement of the residual dye concentrations, spectrophotometrically. The optimum pH, which provides the best degradation ratio was found to be 3.5 for the dye. At the same pH, it was found that silver loaded catalyst is more effective than neat TiO_2 catalyst. The silver loading dramatically reduced the irradiation time from 20 min to 8 min for Sirius Gelb GC. However, the catalytical behavior of the both the catalysts was also investigated in heavy salt media such as simulated wastewater and in a river fluent. Pooled standard deviation (Spooled) of the repeated measurements in all conditions is 0.615 for N=47 and 38 degrees of freedom. Confidence limit of the method is 98.8±0.2 in 95% confidence level.
机译：研究了用于纺织工业的Sirius Gelb GC的水相光催化降解。为了优化工作pH，在pH 3.5制备了三种不同的染料溶液。 7.0和11.0。在不存在和存在催化剂TiO 2或负载Ag的TiO 2的情况下，用低压UV羊羔辐照该溶液的一百立方厘米部分。在所有条件下，将从反应器中取出的样品进行离心分离并与催化剂分离，并通过分光光度法从残留染料浓度的测量中计算出降解百分数。发现该染料具有最佳降解率的最佳pH为3.5。在相同的pH下，发现载银催化剂比纯TiO_2催化剂更有效。对于Sirius Gelb GC，银载量将辐照时间从20分钟显着减少到8分钟。但是，还研究了两种催化剂在重盐介质（如模拟废水）和河水中的催化行为。对于N = 47和38自由度，在所有条件下重复测量的合并标准偏差（假脱机）为0.615。该方法在95％置信水平下的置信限为98.8±0.2。

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