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首页> 外文期刊>RSC Advances >TiO2 immobilized zein microspheres: a biocompatible adsorbent for effective dye decolourisation
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TiO2 immobilized zein microspheres: a biocompatible adsorbent for effective dye decolourisation

机译：TiO2固定的玉米醇溶蛋白微球：生物相容性吸附剂，可有效使染料脱色

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摘要

Natural protein polymers and metal oxide nanoparticles individually possess potential efficiency for dye binding and photocatalytic dye degradation, respectively. To attain these multifunctional properties, we have developed a composite zein-TiO2 microsphere, characterized it and evaluated its dye adsorption and photocatalytic efficiency. The phase structure, morphology, elemental composition and porous nature of the microspheres were characterized by using X-ray diffraction (XRD), Fourier transform-infra red (FTIR) spectroscopy, field emission-scanning electron microscopy (FE-SEM) with energy dispersive X-ray spectroscopy (EDAX), and nitrogen adsorption-desorption isotherm measurements. Adsorption experiments were performed by varying different parameters like contact time, initial dye concentration and adsorbent dosage, and the various adsorption isotherms and kinetics were tested. The results revealed that the Langmuir and Tempkin isotherms were more appropriate and followed a pseudo-first order model for the adsorption of acid yellow (AY110) and acid blue (AB113) dyes. The fluorescence probe method was used to confirm the generation of (OH)-O-center dot radicals and elucidated the photodegradation mechanism. Therefore, metallo-polymer based adsorbents provide new scope in the selection of ideal adsorbents for efficient separation and remediation technologies in tannery effluent management.
机译：天然蛋白质聚合物和金属氧化物纳米颗粒分别具有潜在的染料结合和光催化染料降解效率。为了获得这些多功能特性，我们开发了玉米醇溶蛋白-TiO2复合微球，对其进行了表征，并评估了其对染料的吸附和光催化效率。利用X射线衍射（XRD），傅立叶变换红外光谱（FTIR），能谱分散的场发射扫描电子显微镜（FE-SEM）对微球的相结构，形貌，元素组成和多孔性质进行了表征。 X射线光谱（EDAX）和氮吸附-解吸等温线测量。通过改变接触时间，初始染料浓度和吸附剂量等不同参数进行吸附实验，并测试了各种吸附等温线和动力学。结果表明，Langmuir和Tempkin等温线更合适，并遵循拟一阶模型吸附酸性黄（AY110）和酸性蓝（AB113）染料。用荧光探针法确定了（OH）-O-中心点自由基的产生，并阐明了光降解机理。因此，基于金属聚合物的吸附剂为制革厂废水管理中的有效分离和修复技术的理想吸附剂的选择提供了新的范围。

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