Rani Manviri, Shanker Uma
Department of Chemistry, Malaviya National Institute of Technology, Jaipur, Rajasthan, 302017, India.
Department of Chemistry, Malaviya National Institute of Technology, Jaipur, Rajasthan, 302017, India; Department of Chemistry, Dr B R Ambedkar National Institute of Technology, Jalandhar, Punjab, India, 144011.
Chemosphere. 2024 Mar;352:141337. doi: 10.1016/j.chemosphere.2024.141337. Epub 2024 Jan 31.
The world's attention is drawn to the widespread ingestion, toxicity, and bioaccumulation of the Atrazine (AT) and Endosulfan (ES). Pesticides have been proven to have endocrine-disrupting, genotoxic, and persistent characteristics. In this work, the structural design of green synthesized NiFeO is incorporated in rice husk biochar to form BC@NiFeO nanocomposite. Powder X-ray diffraction and microscopic analysis confirmed the semi-crystalline nature of BC@NiFeO reduced due to the incorporation of amorphous BC. The green BC@NiFeO nanocomposite degraded AT and ES up to 98 % and 92 %, respectively. The maximum degradation achieved by BC@NiFeO nanocomposite with minimum pollutants concentration (50 mg L) with 10 mg catalyst dose at acidic pH in natural sunlight because of the higher negative value of zeta potential (-26.4 mV) and lower band gap (2.5 eV). The degradation process involves first-order kinetics followed by initial Langmuir adsorption. The presence of various radical quenchers (t-BuOH, p-BZQ, NaEDTA) has led to the conclusion that hydroxyl radicals play a significant role in the degradation of the toxic substances AT and ES. Additionally, a green-fabricated BC@NiFeO nanocomposite has exhibited exceptional efficiency in degrading AT and ES pollutants in actual wastewater samples. Furthermore, this nanocomposite has demonstrated outstanding sustainability and cost-effectiveness, maintaining its effectiveness for up to eight cycles without a noticeable reduction in activity. In summary, due to its favorable surface characteristics, the environmentally friendly BC@NiFeO nanocomposite holds excellent promise as a unique and potential photocatalyst for various industrial applications.
全世界的注意力都被吸引到莠去津（AT）和硫丹（ES）的广泛摄入、毒性和生物累积上。农药已被证明具有内分泌干扰、基因毒性和持久性特征。在这项工作中，将绿色合成的NiFeO的结构设计纳入稻壳生物炭中，形成BC@NiFeO纳米复合材料。粉末X射线衍射和微观分析证实，由于非晶态BC的掺入，BC@NiFeO的半结晶性质降低。绿色的BC@NiFeO纳米复合材料分别将AT和ES降解了98%和92%。由于zeta电位的负值较高（-26.4 mV）且带隙较低（2.5 eV），BC@NiFeO纳米复合材料在自然阳光下的酸性pH条件下，以10 mg催化剂剂量对最低污染物浓度（50 mg/L）实现了最大降解。降解过程涉及一级动力学，随后是初始朗缪尔吸附。各种自由基猝灭剂（叔丁醇、对苯醌、乙二胺四乙酸钠）的存在得出结论，羟基自由基在有毒物质AT和ES的降解中起重要作用。此外，绿色制备的BC@NiFeO纳米复合材料在实际废水样品中对AT和ES污染物的降解表现出卓越的效率。此外，这种纳米复合材料还表现出出色的可持续性和成本效益，在八个循环内保持其有效性，活性没有明显降低。总之，由于其良好的表面特性，环境友好型BC@NiFeO纳米复合材料作为一种独特且有潜力的光催化剂在各种工业应用中具有极好的前景。
