Nanobiotechnology Laboratory, Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Tamil Nadu, India.
Botany and Microbiology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia.
J Environ Manage. 2022 Sep 1;317:115321. doi: 10.1016/j.jenvman.2022.115321. Epub 2022 Jun 3.
Sustainable wastewater treatment is crucial to remediate the water pollutants through the development of highly efficient, low-cost and separation free photocatalyst. The aim of this study is to construct a novel CoNiO-BiFeO-NiS ternary nanocomposite (NCs) for the efficient degradation of organic pollutants by utilising visible light. The NCs was characterized by various physiochemical techniques, including HR-TEM, SEM, XPS, FT-IR, ESR, EIS, PL, UV-visible DRS, and N adsorption and desorption analysis. The photocatalyst exhibits extraordinary degradation efficiency towards MO (99.8%) and RhB (97.8%). The intermediates were determined using GC-MS analysis and the degradation pathway was elucidated. The complete mineralization was further confirmed by TOC analysis. The CoNiO-BiFeO-NiS ternary NCs have shown excellent photostability, structural stability and reusability even after six cycles and it is confirmed by XRD and XPS analysis. The kinetic study reveals that the photodegradation of the dyes follows first order reaction. The influence of different pH, dye concentrations and NCs dosages were investigated. The intermediate toxicity was predicted by computational stimulation using ECOSAR software. The NCs shows promising potential for ecological safety which demonstrates its practical application in the treatment of waste water pollutants in large scale.
可持续的废水处理对于通过开发高效、低成本和无分离的光催化剂来修复水污染至关重要。本研究的目的是构建一种新型的 CoNiO-BiFeO-NiS 三元纳米复合材料（NCs），以利用可见光有效地降解有机污染物。NCs 通过各种物理化学技术进行了表征，包括高分辨率透射电子显微镜（HR-TEM）、扫描电子显微镜（SEM）、X 射线光电子能谱（XPS）、傅里叶变换红外光谱（FT-IR）、电子顺磁共振（ESR）、电化学阻抗谱（EIS）、光致发光（PL）、紫外-可见漫反射光谱（UV-visible DRS）、氮气吸附和解吸分析。该光催化剂对 MO（99.8%）和 RhB（97.8%）具有非凡的降解效率。通过 GC-MS 分析确定了中间产物，并阐明了降解途径。TOC 分析进一步证实了完全矿化。即使经过六次循环，CoNiO-BiFeO-NiS 三元 NCs 仍表现出出色的光稳定性、结构稳定性和可重复使用性，这可以通过 XRD 和 XPS 分析得到证实。动力学研究表明，染料的光降解遵循一级反应。研究了不同 pH 值、染料浓度和 NCs 剂量的影响。使用 ECOSAR 软件通过计算模拟预测了中间产物的毒性。NCs 显示出良好的生态安全性潜力，这证明了其在大规模处理废水污染物方面的实际应用。
