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首页> 外文期刊>The Journal of the Textile Institute >Preparation, characterization and evaluation of the catalytic power of an hybrid compound [H_3PMo_(12)O_(40)-chitosan] for the azoic-colored solutions
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Preparation, characterization and evaluation of the catalytic power of an hybrid compound [H_3PMo_(12)O_(40)-chitosan] for the azoic-colored solutions

机译:杂化化合物[H_3PMo_(12)O_(40)-壳聚糖]的制备,表征和催化活性

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摘要

Inorganic-organic hybrid structures have become novel alternatives for many applications as they combine the advantages of both systems. In this current study, a hybrid compound [H3PMo12O40-chitosan] was prepared using a wet impregnation method with different proportions (0-100 wt. %, considering the polymer as the main component). The chemical structure and the morphology of the synthesized compounds were studied using FT-IR and SEM. Their catalytic powers were evaluated for Naphtol Blue Black and Eriochrome Blue Black B. Experimental data revealed that the decolorization phenomenon depends on the structure of the dye it-self, the pH value, the initial dye concentration, the time contact, the oxidant dose and the temperature. Kinetic data, well described using the first order model, allowed us to establish the thermodynamic parameters. The calculated low values of Ea (7.48 and 8.14 KJ. mol(-1)) proved the efficiency of the prepared catalyst. Eriochrome Blue Black B could be decomposed more rapidly than Naphtol Blue Black. As example, after a period of 30 min of reaction, the target removals were, respectively, 70% and 15% for mono and bi-azoic dyes. The reuse of the catalyst is carried out and it was found to be recyclable more than three consecutives cycles.
机译:无机-有机杂化结构结合了两种系统的优点,已成为许多应用的新型替代物。在本研究中,使用湿法浸渍法以不同的比例(0-100重量%,以聚合物为主要成分)制备了杂化化合物[H3PMo12O40-壳聚糖]。用FT-IR和SEM研究了合成化合物的化学结构和形态。对萘酚蓝黑和铬蓝黑B的催化能力进行了评估。实验数据表明,脱色现象取决于染料本身的结构,pH值,初始染料浓度,接触时间,氧化剂剂量和温度。使用一阶模型很好地描述了动力学数据,这使我们能够建立热力学参数。 Ea的低计算值(7.48和8.14 KJ。mol(-1))证明了所制备催化剂的效率。铬蓝黑B的分解速度可能比萘酚蓝黑快。例如,经过30分钟的反应后,单偶氮染料和双偶氮染料的目标去除率分别为70%和15%。进行了催化剂的再利用,发现它可以连续三个以上循环使用。

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