Garg Alok, Singhania Tejasvi, Singh Ashutosh, Sharma Shilpa, Rani Sonam, Neogy Ananya, Yadav Shri Ram, Sangal Vikas Kumar, Garg Neha
Department of Chemical Engineering, Thapar Institute of Engineering & Technology, Patiala, 147004, India.
School of Chemistry and Biochemistry, Thapar Institute of Engineering & Technology, Patiala, 147004, India.
Sci Rep. 2019 Jan 24;9(1):765. doi: 10.1038/s41598-018-38358-w.
Advanced oxidation processes (AOPs) including heterogeneous photocatalysis has proven as one of the best technique for waste-water treatment. Photocatalytic process using semiconductor like TiO based heterogeneous photocatalysis is a promising method for the treatment of toxic pollutants. In the present study, visible-light photoactive cobalt and nitrogen co-doped TiO nanoparticles were synthesized via wet impregnation method. The photocatalysts were characterized using X-ray diffraction (XRD), Raman Spectra, Fourier Transform Infrared (FTIR) Spectroscopy, Scanning Electron Microscopy (SEM), Transmission Electron Microscope (TEM), UV-vis spectrophotometer and X-ray photoelectron spectrophotometer (XPS). The photocatalytic activitiy of prepared (N, Co)-codoped TiO on the mineralization of Bisphenol-A (BPA) under visible light irradiation was studied and the results were compared to commercial TiO (Degussa P25). The results demonstrated that 1.5% Co and 0.5% N - codoped TiO samples revealed higher activity than commercial TiO. Total organic carbon (TOC) removal was observed to be 97%, which indicate the complete mineralization of BPA. GC-MS analysis was carried to find out the possible intermediates formed and reaction pathway.
包括多相光催化在内的高级氧化工艺（AOPs）已被证明是废水处理的最佳技术之一。使用基于TiO等半导体的多相光催化的光催化过程是处理有毒污染物的一种有前途的方法。在本研究中，通过湿浸渍法合成了可见光光活性钴和氮共掺杂的TiO纳米颗粒。使用X射线衍射（XRD）、拉曼光谱、傅里叶变换红外（FTIR）光谱、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、紫外可见分光光度计和X射线光电子能谱仪（XPS）对光催化剂进行了表征。研究了制备的（N，Co）共掺杂TiO在可见光照射下对双酚A（BPA）矿化的光催化活性，并将结果与商用TiO（Degussa P25）进行了比较。结果表明，1.5%Co和0.5%N共掺杂的TiO样品显示出比商用TiO更高的活性。观察到总有机碳（TOC）去除率为97%，这表明BPA已完全矿化。进行了GC-MS分析以找出可能形成的中间体和反应途径。
