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Nanostructured zirconium tungstate and its bionanocomposite with chitosan: Wet peroxide photocatalytic degradation of dyes
Journal of the Taiwan Institute of Chemical Engineers ( IF 5.7 ) Pub Date : 2018-01-10 , DOI: 10.1016/j.jtice.2017.12.018
Ageetha Vanamudan , Mohini Sadhu , Padmaja Sudhakar Pamidimukkala

In this study nanoclusters of zirconium tungstate (ZrW) were synthesized hydrothermally in a stainless steel autoclave and its bionanocomposite with chitosan (CZrW) was fabricated. The synthesized ZrW and CZrW were characterized by UV, FTIR, XRD, TEM Raman and TGA techniques and further explored for their catalytic potential in degradation of dyes. ZrW and CZrW exhibited high photocatalytic activity for degradation of cationic and anionic dyes as well as their binary mixture under ambient conditions using H2O2. It was observed that CZrW was more effective in degradation of dyes as compared to ZrW while ZrW was more efficient in mineralization. The high catalytic activity can be attributed to the possible formation of surface peroxy complexes by ZrW and CZrW. Furthermore the green catalyst could be reused for degradation of dyes for three cycles without significant loss in efficiency. This study opens new avenues in designing CZrW based green catalysts for degradation of dyes.



中文翻译:

纳米结构钨酸锆及其与壳聚糖的纳米复合材料:湿式过氧化物光催化降解染料

在这项研究中,钨酸锆(ZrW)的纳米簇是在不锈钢高压釜中水热合成的,并制造了其与壳聚糖的纳米复合材料(CZrW)。通过UV,FTIR,XRD,TEM Raman和TGA技术对合成的ZrW和CZrW进行了表征,并进一步探索了它们在染料降解中的催化潜力。ZrW和CZrW在环境条件下使用H 2 O 2表现出高的光催化活性,可降解阳离子和阴离子染料以及它们的二元混合物。。观察到,与ZrW相比,CZrW在染料降解方面更有效,而ZrW在矿化方面更有效。高催化活性可以归因于ZrW和CZrW可能形成表面过氧化物配合物。此外,绿色催化剂可以再用于染料降解三个循环,而效率没有显着损失。这项研究为设计用于降解染料的基于CZrW的绿色催化剂开辟了新途径。

更新日期:2018-01-10
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