Kumari Pooja, Saha Rajib, Saikia Gaurav, Bhujel Aditya, Choudhury Mahua Gupta, Jagdale Pravin, Paul Samrat
Advanced Materials Research and Energy Application Laboratory (AMREAL), Department of Energy Engineering, North-Eastern Hill University, Shillong 793022, India.
Department of Applied Science and Technology, Politecnico di Torino, 10129 Turin, Italy.
Toxics. 2023 Feb 28;11(3):234. doi: 10.3390/toxics11030234.
The use of TiO nanoparticles for photocatalysis for the degradation of organic dyes under UV light for wastewater treatment has been widely studied. However, the photocatalytic characteristics of TiO nanoparticles are inadequate due to their UV light response and higher band gap. In this work, three nanoparticles were synthesized: (i) TiO nanoparticle was synthesized by a sol-gel process. (ii) ZrO was prepared using a solution combustion process and (iii) mixed-phase TiO-ZrO nanoparticles were synthesized by a sol-gel process to remove Eosin Yellow (EY) from aqueous solutions in the wastewater. XRD, FTIR, UV-VIS, TEM, and XPS analysis methods were used to examine the properties of the synthesized products. The XRD investigation supported the tetragonal and monoclinic crystal structures of the TiO and ZrO nanoparticles. TEM studies identified that mixed-phase TiO-ZrO nanoparticles have the same tetragonal structure as pure mixed-phase. The degradation of Eosin Yellow (EY) was examined using TiO, ZrO, and mixed-phase TiO-ZrO nanoparticles under visible light. The results confirmed that the mixed-phase TiO-ZrOnanoparticles show a higher level of photocatalytic activity, and the process is accomplished at a high degradation rate in lesser time and at a lower power intensity.
利用二氧化钛纳米颗粒在紫外光下进行光催化降解有机染料以处理废水的研究已广泛开展。然而，由于二氧化钛纳米颗粒的紫外光响应和较高的带隙，其光催化特性并不理想。在本研究中，合成了三种纳米颗粒：（i）通过溶胶-凝胶法合成二氧化钛纳米颗粒。（ii）采用溶液燃烧法制备氧化锆，以及（iii）通过溶胶-凝胶法合成混合相二氧化钛-氧化锆纳米颗粒，用于去除废水中水溶液中的曙红Y（EY）。使用X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）、紫外可见光谱（UV-VIS）、透射电子显微镜（TEM）和X射线光电子能谱（XPS）分析方法来检测合成产物的性能。XRD研究证实了二氧化钛和氧化锆纳米颗粒的四方晶系和单斜晶系结构。TEM研究确定混合相二氧化钛-氧化锆纳米颗粒与纯混合相具有相同的四方结构。在可见光下，使用二氧化钛、氧化锆和混合相二氧化钛-氧化锆纳米颗粒检测曙红Y（EY）的降解情况。结果证实，混合相二氧化钛-氧化锆纳米颗粒表现出更高水平的光催化活性，该过程在更短的时间内以更高的降解率和更低的功率强度完成。
