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An environmental approach for the photodegradation of toxic pollutants from wastewater using silver nanoparticles decorated titania-reduced graphene oxide
Journal of Environmental Chemical Engineering ( IF 7.7 ) Pub Date : 2021-05-09 , DOI: 10.1016/j.jece.2021.105622
Ankita Ojha , Pardeep Singh , Ramesh Oran , Dhanesh Tiwary , Ajay K. Mishra , Ayman A. Ghfar , Mu. Naushad , Tansir Ahamad , Binota Thokchom , K. Vijayaraghavan , S Rangabhashiyam

Light-induced demineralization of organic pollutants is a recent development in the field of waste treatment. The present study focuses on TiO2-rGO-Ag hybrid nanocomposite through a two-step simultaneous synthesis pathway. The methods primarily involving facile solvothermal treatment (TiO2-rGO nanocomposite) in a water-ethanol mixture, followed by microwave irradiation method for deposition of silver (Ag) nanoparticles over the Binary nanocomposite synthesized. The resulting hybrid photocatalyst was well, and in-detail characterized using analytical techniques such as High-Resolution X-ray Diffractometer (HR-XRD), Transmission Electron Microscopy and High-Resolution Transmission Electron Microscopy (TEM/HR-TEM), High-Resolution Scanning Electron Microscopy (HR-SEM), Fourier-Transform Infra-Red Spectroscopy (FT-IR), Energy Dispersive X-Ray Spectroscopy (EDX), Raman Spectroscopy, Solid-State UV–Vis Spectroscopy and X-Ray Photoelectron spectroscopy (XPES). The nanomaterial was examined to determine photocatalytic property by conducting a photodegradation experiment of an aqueous solution of Methylene Blue (MB) dye and monitoring the changes. The photocatalytic efficiency of the nano-hybrid synthesized was also analyzed in detail for the degradation of compounds that active components of petrochemical pollutants such as Benzene, Toluene, and Phenol the Visible region of radiation in a photochemical reactor under ambient reaction conditions. The set of experiments suggested that the photocatalytic efficiency of ternary nanocomposite synthesized was quite noticeable. The variation in the catalyst's photoactivity with the change in the functional group was monitored, and the rate of reaction has been correlated with attached substituents.



中文翻译:

使用纳米银修饰的二氧化钛还原氧化石墨烯光降解废水中有毒污染物的环境方法

光诱导的有机污染物的脱矿质是废物处理领域中的最新进展。本研究集中于通过两步同时合成途径的TiO 2 -rGO-Ag杂化纳米复合材料。主要涉及简便的溶剂热处理(TiO 2-rGO纳米复合材料)在水-乙醇混合物中,然后用微波辐射法在合成的二元纳米复合材料上沉积银(Ag)纳米颗粒。所得的杂化光催化剂性能良好,并使用高分辨率X射线衍射仪(HR-XRD),透射电子显微镜和高分辨率透射电子显微镜(TEM / HR-TEM),分辨率扫描电子显微镜(HR-SEM),傅立叶变换红外光谱(FT-IR),能量色散X射线光谱(EDX),拉曼光谱,固态UV-Vis光谱和X射线光电子光谱( XPES)。通过对亚甲基蓝(MB)染料的水溶液进行光降解实验并监测其变化来检查纳米材料以确定光催化性能。还详细分析了在环境反应条件下,光化学反应器中辐射的可见区中石化污染物(如苯,甲苯和苯酚)的活性成分在辐射的可见区的降解情况,从而详细分析了合成的纳米杂化物的光催化效率。这组实验表明,合成的三元纳米复合材料的光催化效率非常显着。监测了催化剂的光活性随官能团变化的变化,并且反应速率已与所连接的取代基相关联。还详细分析了在环境反应条件下,光化学反应器中辐射的可见区中石化污染物(如苯,甲苯和苯酚)的活性成分在辐射的可见区的降解情况,从而详细分析了合成的纳米杂化物的光催化效率。这组实验表明,合成的三元纳米复合材料的光催化效率非常显着。监测了催化剂的光活性随官能团变化的变化,并且反应速率已与所连接的取代基相关联。还详细分析了在环境反应条件下,光化学反应器中辐射的可见区中石化污染物(如苯,甲苯和苯酚)的活性成分在辐射的可见区的降解情况,从而详细分析了合成的纳米杂化物的光催化效率。这组实验表明,合成的三元纳米复合材料的光催化效率非常显着。监测了催化剂的光活性随官能团变化的变化,并且反应速率已与所连接的取代基相关联。这组实验表明,合成的三元纳米复合材料的光催化效率非常显着。监测了催化剂的光活性随官能团变化的变化,并且反应速率已与所连接的取代基相关联。这组实验表明,合成的三元纳米复合材料的光催化效率非常显着。监测了催化剂的光活性随官能团变化的变化,并且反应速率已与所连接的取代基相关联。

更新日期:2021-05-10
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