Biorefinery Engineering and Microfluidics (BEAM) Research Group, Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Pakistan; Department of Chemical Engineering, Khawaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, Pakistan.
Biorefinery Engineering and Microfluidics (BEAM) Research Group, Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, Pakistan.
J Hazard Mater. 2020 May 15;390:121623. doi: 10.1016/j.jhazmat.2019.121623. Epub 2019 Nov 10.
TiO based photocatalysts are extensively used for textile wastewater treatment as they are ecofriendly, inexpensive, easily available, nontoxic and have higher photostabililty. However, their wider band gap, charge carrier's recombination, and utilization of light absorbance limits their performance. In the present work, a hybrid biochar-TiO composite (BCT) has been synthesized by a facile synthesis strategy to overcome these problems. These photocatalysts are characterized using X-ray Diffraction (XRD), Scanning Electron Microscope (SEM), Fourier Transform Infrared (FTIR), UV-vis diffuse reflectance spectra (DRS), and photoluminescence (PL) to evaluate their crystallinity, morphology, functional groups, bandgap energy and charge separation properties, respectively. The photodegradation of simulated textile wastewater is analyzed using hybrid composites. The hybrid biochar-TiO composite showed higher charge separation, slow recombination of electron-hole pairs, and enhanced light absorption as compared to control (pure TiO and BC alone). 99.20 % photodegradation efficiency of dye-simulated wastewater is achieved employing optimum hybrid composite, while the pure biochar and TiO samples exhibits 85.20 % and 42.60 % efficiencies, respectively. The maximum adsorption capacity is obtained for hybrid biochar-TiO sample, 74.30 mgg in comparison to biochar (30.40 mgg) and pure TiO (1.50 mgg). The results show that hybrid biochar-TiO composites can perform in the target application of organic industrial pollutant removal.
基于 TiO 的光催化剂由于其环保、廉价、易得、无毒且具有更高的光稳定性而被广泛用于处理纺织废水。然而，它们的宽带隙、载流子复合以及对光吸收的利用限制了它们的性能。在本工作中，通过一种简便的合成策略合成了一种混合生物炭-TiO 复合材料 (BCT) 来克服这些问题。这些光催化剂通过 X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、傅里叶变换红外 (FTIR)、紫外-可见漫反射光谱 (DRS) 和光致发光 (PL) 进行了表征，分别评估它们的结晶度、形貌、官能团、带隙能和电荷分离特性。使用混合复合材料分析了模拟纺织废水的光降解。与对照（纯 TiO 和 BC 单独）相比，混合生物炭-TiO 复合材料表现出更高的电荷分离、电子-空穴对缓慢复合和增强的光吸收。采用最佳混合复合材料可实现染料模拟废水 99.20%的光降解效率，而纯生物炭和 TiO 样品的效率分别为 85.20%和 42.60%。与生物炭（30.40 mgg）和纯 TiO（1.50 mgg）相比，混合生物炭-TiO 样品的最大吸附容量为 74.30 mgg。结果表明，混合生物炭-TiO 复合材料可用于去除有机工业污染物的目标应用。
