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首页> 外文期刊>Journal of the Taiwan Institute of Chemical Engineers >Synthesis, characterisation and application of TiO2-zeolite nanocomposites for the advanced treatment of industrial dye wastewater
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Synthesis, characterisation and application of TiO2-zeolite nanocomposites for the advanced treatment of industrial dye wastewater

机译：TiO2-沸石纳米复合材料的合成，表征及在工业染料废水深度处理中的应用

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摘要

Photocatalysis usually involves the utilisation of nano-sized semiconductor photocatalysts owing to their higher specific surface area and surface reaction rate. However, the key challenges in the utilisation of nano-sized photocatalysts for advanced treatment of industrial dye wastewater are to enhance the post-separation and recovery of spent photocatalysts to prevent them from diffusing into the environment. Thus, the main aim of this study was to synthesize a functional-form of titanium dioxide (TiO2)-zeolite nanocomposite through the modified two-step sol-gel method for enhanced application and separation after advanced industrial dye wastewater treatment. The synthesized TiO2-zeolite nanocomposite was characterised using field-emission scanning electron microscopy (FE-SEM), energy dispersive X-ray (EDX) analysis, Fourier-transformed infrared spectroscopy (FTIR), particle size distribution analysis and Brunauer-Emmett-Teller (BET) specific surface area and porosity analysis. Subsequently, the photoactivity of synthesized TiO2-zeolite nanocomposite was measured and compared against the commercial TiO2 particles. It was found that the TiO2-zeolite nanocomposite shows a high apparent pseudo-first order reaction rate constant of 0.0419 min(-1) at lower dye concentration. This showed that the synthesized TiO2-zeolite nanocomposite follows a more adsorption-oriented photocatalytic degradation of water pollutants, which is useful for removing trace and untreated dye compounds in the advanced industrial dye wastewater treatment stage. (C) 2015 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
机译：由于其较高的比表面积和表面反应速率，光催化通常涉及利用纳米尺寸的半导体光催化剂。然而，将纳米级光催化剂用于工业染料废水的深度处理中的关键挑战是增强废光催化剂的后分离和回收，以防止它们扩散到环境中。因此，本研究的主要目的是通过改进的两步溶胶-凝胶法合成二氧化钛（TiO2）-沸石纳米复合材料的功能形式，以增强工业染料废水的先进处理后的应用和分离。利用场发射扫描电子显微镜（FE-SEM），能量色散X射线（EDX）分析，傅立叶变换红外光谱（FTIR），粒度分布分析和Brunauer-Emmett-Teller对合成的TiO2-沸石纳米复合材料进行了表征。 （BET）比表面积和孔隙率分析。随后，测量了合成的TiO2-沸石纳米复合材料的光活性并将其与市售的TiO2颗粒进行了比较。发现TiO2-沸石纳米复合材料在较低的染料浓度下显示出0.0419 min（-1）的高表观拟一级反应速率常数。这表明，合成的TiO2-沸石纳米复合材料具有更强的吸附导向性，可对水污染物进行光催化降解，这对于在先进的工业染料废水处理阶段去除痕量和未处理的染料化合物很有用。 （C）2015台湾化学工程师学会。由Elsevier B.V.发布。保留所有权利。

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