{"title":"镍钴铝层状金属氧化物催化剂过二硫酸盐激活的吡虫啉降解:Al的独特作用","authors":"","doi":"10.1016/j.seppur.2024.129845","DOIUrl":null,"url":null,"abstract":"<div><div>Improper use of neonicotinoid insecticides (NNIs) can cause serious harm to aquatic ecosystems and human health. Despite the demonstrated excellent reactivity of nonradical persulfate activation in complex aquatic environments, the relationship between defect engineering and catalytic activity, as well as the construction of nonradical directed activation systems, remains uncertain. In this study, we synthesized and characterized Al-doped NiCoAl-LDO layered metal oxide catalysts for the first time. These catalysts were then used to activate peroxydisulfate (PDS) for degrading imidacloprid (IMI) in wastewater. Through degradation experiments and characterization analysis, singlet oxygen (<sup>1</sup>O<sub>2</sub>) and electron transfer were identified as the primary mechanisms responsible for IMI removal. Under optimized conditions (0.5 g/L catalyst loading, 1 mM PDS dosage, pH = 7.0), the degradation rate of IMI reached 0.06 min<sup>−1</sup>. The NiCo<sub>2</sub>Al<sub>1</sub>-LDO/PDS system exhibited efficient IMI degradation over a wide pH range (pH = 4–10) (> 73.6 %) and demonstrated excellent resistance against interference from anions such as Cl<sup>−</sup>, SO<sub>4</sub><sup>2−</sup>, HCO<sub>3</sub><sup>−</sup>, CO<sub>3</sub><sup>2−</sup>, as well as Humic acid (HA). Our findings confirm that Al doping induces lattice distortion and enhances interfacial electron transfer processes in the catalyst structure, thereby facilitating the transformation from radical to nonradical pathway during the degradation process. This study not only advances our fundamental understanding of metal oxide active site doping regulation, but also presents a novel defect engineering strategy for nonradical oxidation of IMI, offering valuable insights for future research and practical applications of persulfate.</div></div>","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":null,"pages":null},"PeriodicalIF":8.1000,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Imidacloprid degradation activated by peroxydisulfate with NiCoAl layered metal oxide catalysts: The unique role of Al\",\"authors\":\"\",\"doi\":\"10.1016/j.seppur.2024.129845\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Improper use of neonicotinoid insecticides (NNIs) can cause serious harm to aquatic ecosystems and human health. Despite the demonstrated excellent reactivity of nonradical persulfate activation in complex aquatic environments, the relationship between defect engineering and catalytic activity, as well as the construction of nonradical directed activation systems, remains uncertain. In this study, we synthesized and characterized Al-doped NiCoAl-LDO layered metal oxide catalysts for the first time. These catalysts were then used to activate peroxydisulfate (PDS) for degrading imidacloprid (IMI) in wastewater. Through degradation experiments and characterization analysis, singlet oxygen (<sup>1</sup>O<sub>2</sub>) and electron transfer were identified as the primary mechanisms responsible for IMI removal. Under optimized conditions (0.5 g/L catalyst loading, 1 mM PDS dosage, pH = 7.0), the degradation rate of IMI reached 0.06 min<sup>−1</sup>. The NiCo<sub>2</sub>Al<sub>1</sub>-LDO/PDS system exhibited efficient IMI degradation over a wide pH range (pH = 4–10) (> 73.6 %) and demonstrated excellent resistance against interference from anions such as Cl<sup>−</sup>, SO<sub>4</sub><sup>2−</sup>, HCO<sub>3</sub><sup>−</sup>, CO<sub>3</sub><sup>2−</sup>, as well as Humic acid (HA). Our findings confirm that Al doping induces lattice distortion and enhances interfacial electron transfer processes in the catalyst structure, thereby facilitating the transformation from radical to nonradical pathway during the degradation process. This study not only advances our fundamental understanding of metal oxide active site doping regulation, but also presents a novel defect engineering strategy for nonradical oxidation of IMI, offering valuable insights for future research and practical applications of persulfate.</div></div>\",\"PeriodicalId\":427,\"journal\":{\"name\":\"Separation and Purification Technology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":8.1000,\"publicationDate\":\"2024-09-26\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Separation and Purification Technology\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1383586624035846\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Separation and Purification Technology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1383586624035846","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
Imidacloprid degradation activated by peroxydisulfate with NiCoAl layered metal oxide catalysts: The unique role of Al
Improper use of neonicotinoid insecticides (NNIs) can cause serious harm to aquatic ecosystems and human health. Despite the demonstrated excellent reactivity of nonradical persulfate activation in complex aquatic environments, the relationship between defect engineering and catalytic activity, as well as the construction of nonradical directed activation systems, remains uncertain. In this study, we synthesized and characterized Al-doped NiCoAl-LDO layered metal oxide catalysts for the first time. These catalysts were then used to activate peroxydisulfate (PDS) for degrading imidacloprid (IMI) in wastewater. Through degradation experiments and characterization analysis, singlet oxygen (1O2) and electron transfer were identified as the primary mechanisms responsible for IMI removal. Under optimized conditions (0.5 g/L catalyst loading, 1 mM PDS dosage, pH = 7.0), the degradation rate of IMI reached 0.06 min−1. The NiCo2Al1-LDO/PDS system exhibited efficient IMI degradation over a wide pH range (pH = 4–10) (> 73.6 %) and demonstrated excellent resistance against interference from anions such as Cl−, SO42−, HCO3−, CO32−, as well as Humic acid (HA). Our findings confirm that Al doping induces lattice distortion and enhances interfacial electron transfer processes in the catalyst structure, thereby facilitating the transformation from radical to nonradical pathway during the degradation process. This study not only advances our fundamental understanding of metal oxide active site doping regulation, but also presents a novel defect engineering strategy for nonradical oxidation of IMI, offering valuable insights for future research and practical applications of persulfate.
期刊介绍:
Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.