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首页> 外文期刊>Applied Surface Science >The degradation of Direct Blue 71 by sono, photo and sonophotocatalytic oxidation in the presence of ZnO nanocatalyst
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The degradation of Direct Blue 71 by sono, photo and sonophotocatalytic oxidation in the presence of ZnO nanocatalyst

机译：ZnO纳米催化剂存在下声，光和声光催化氧化降解直接蓝71

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The sono, photo and sonophotacatalytic degradation of Direct Blue 71 (DB71) accompanied by heterogeneous ZnO catalysts were studied by using the ultrasonic power of 95 W at 20 kHz and aqueous temperature of 20 ℃ within 20min. The effects of various experimental parameters such as the dye concentration, pH and amount of catalyst on the sonochemical degradation were also investigated. Sono-chemical degradation of DB71 was strongly affected by initial substrate concentration, amount of catalyst and pH. Acidic pH was favored for the sonocatalytic degradation of DB71 using catalyst. The ultrasonic degradation of dye was enhanced by the addition of catalyst. In addition, the effects of H_2O_2 on sonol-ysis and sonocatalytic oxidation were studied, and it was found that H_2O_2 enhanced the degradation of dye. Then, the effect of ZnO on photo and sonophotocatalytic oxidation was also investigated, and it was found that UV/ZnO combination was a more effective treatment on DB71 dyestuff. The structure and morphology of the catalyst were investigated using scanning election microscopy (SEM) and XRD pattern.
机译：利用95 W的超声功率在20 kHz和20℃的水温下20min内，研究了直接蓝71（DB71）与异质ZnO催化剂的声，光和声催化降解。还研究了各种实验参数，如染料浓度，pH和催化剂用量对声化学降解的影响。初始底物浓度，催化剂量和pH值强烈影响DB71的声化学降解。酸性pH有利于用催化剂声催化降解DB71。通过添加催化剂，染料的超声降解得到增强。此外，研究了H_2O_2对声分解和声催化氧化的影响，发现H_2O_2可促进染料的降解。然后，还研究了ZnO对光催化和声光催化氧化的影响，发现UV / ZnO组合是对DB71染料更有效的处理方法。使用扫描电子显微镜（SEM）和XRD图谱研究了催化剂的结构和形态。

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