Abstract

The aim of this study was photocatalytic degradation of Direct Blue 199 and Basic Yellow 28 dyes under the influence of visible light by TiO₂-Fe₂O₃ nanocomposite. TiO₂-Fe₂O₃ nanocomposite was synthesized by the Sol-gel method and the properties of the nanocomposite were a characterized by using FTIR, SEM, XRD and TEM analysis. XRD analysis showed that the production of titanium oxide and iron oxide without any impurities and the size of TiO₂-Fe₂O₃ nanocomposite crystals was calculated using Debay-Scherrer relationship at about 17 nm. SEM images showed a nanoparticle pattern with dimensions of about 25 nm for the traditional nanocomposite. Also, photocatalytic behavior of the synthesized nanocomposite in the removal of Direct Blue 199 and Basic Yellow 28 dyes from the aqueous medium was investigated by irradiating a metal halide lamp in a period of 60 minutes of darkness and 150 minutes of light. In this research, pH, dye protection concentration, nanocomposite content and irradiation time were considered as the most effective factors in the photocatalytic degradation of direct blue dyes 199 and yellow base 28 and it was determined that the values of experimental data and calculated from Through the model they conform well to the correlation coefficient of 98.7%. Finally, the degradation rate of TiO₂-Fe2O₃ nanocomposite with a ratio of 0.75: 1 for direct blue 199 and Basic Yellow 28 was 96.77% and 97.68%, respectively.

摘要

_{本研究的目的是通过 TiO 2} -Fe ₂ O ₃纳米复合材料在可见光的影响下光催化降解直接蓝 199 和碱性黄 28 染料。采用溶胶-凝胶法合成了TiO ₂ -Fe ₂ O _{3纳米复合材料，并通过FTIR、SEM、XRD和TEM分析对纳米复合材料的性能进行了表征。XRD分析表明，生产的二氧化钛和三氧化二铁没有任何杂质和TiO 2} -Fe ₂ O ₃的大小使用 Debay-Scherrer 关系在约 17 nm 处计算纳米复合晶体。SEM 图像显示了传统纳米复合材料的纳米颗粒图案，尺寸约为 25 nm。此外，通过在黑暗 60 分钟和光照 150 分钟的时间内照射金属卤化物灯，研究了合成纳米复合材料从水性介质中去除直接蓝 199 和碱性黄 28 染料的光催化行为。在这项研究中，pH、染料保护浓度、纳米复合材料含量和辐照时间被认为是光催化降解直接蓝染料 199 和黄基 28 的最有效因素，并确定了实验数据和计算的值。模型它们符合 98.7% 的相关系数。最后，_{直接蓝199和碱性黄28的2} -Fe2O ₃比例为0.75:1的纳米复合物分别为96.77%和97.68%。