With the abundant use of pesticides in agriculture and grassland farming, water contamination unavoidably occurs due to the leaching of pesticide residues into environment. Now, most of the research on degradation of nitroaromatic pesticides residues has focused on nano catalysis-based method, however, effective post-reaction separation and recycling of the tiny nanocatalysts is also a significant technological challenge to be addressed. Herein, we report a simple and versatile strategy for the construction of efficient and recyclable catalysts of polydopamine (PDA)@Ag/polystyrene (PS) films for degradation of pesticides based on multi-purpose PDA microspheres inspired by mussel adhesion. The PDA not only functioned as a scaffold, a reductant as well as a stabilizer for the formation and dispersions of Ag NPs in situ, but also served as an adhesive layer between the nanocatalysts and the substrate. The obtained PDA@Ag/PS films were evaluated for the first time against the catalytic degradation of pendimethalin. Most importantly, the recovery of catalysts can be easily realized by simply pulling out PS substrate from the reaction mixture and the catalytic activity of the nanofilms was found to be equally efficient for seven catalytic cycles. Considering their excellent catalytic activity and recyclability in the degradation of nitroaromatic pesticides, the PDA@Ag/PS films have great potential applications in the fields of environment protection, soil contamination remediation, and sewage treatment. Also, by virtue of the remarkable reducing and stabilizing ability and adhesive versatility of PDA, this approach can be extended to the deposition of various metals and semiconducting NPs, which can be stably anchored on a diverse range of solid substrates regardless of physiochemical and morphology.
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http://dx.doi.org/10.1016/j.scitotenv.2019.02.105 | DOI Listing |
JACS Au
December 2024
State Key Laboratory of Fine Chemicals, School of Chemistry, Dalian University of Technology, Dalian 116024, China.
Nitroaromatics, as an important member and source of nitrogen-containing aromatics, is bringing enormous economic benefits in fields of pharmaceuticals, dyes, pesticides, functional materials, fertilizers, and explosives. Nonetheless, the notoriously polluting nitration industry, which suffers from excessive discharge of fumes and waste acids, poor functional group tolerance, and tremendous purification difficulty, renders mild, efficient, and environmentally friendly nitration a formidable challenge. Herein, we develop a visible-light-driven biocompatible arene C-H nitration strategy with good efficiency and regioselectivity, marvelous substrate applicability and functional group tolerance, and wide application in scale-up synthesis, total synthesis, and late-stage functionalization.
View Article and Find Full Text PDFSci Total Environ
June 2024
Departamento de Química Fundamental, Universidade Federal de Pernambuco, Recife, Brazil; Departamento de Química & CESAM, Universidade de Aveiro, Aveiro, Portugal. Electronic address:
Water contamination represents a significant ecological impact with global consequences, contributing to water scarcity worldwide. The presence of several pollutants, including heavy metals, pharmaceuticals, pesticides, and pathogens, in water resources underscores a pressing global concern, prompting the European Union (EU) to establish a Water Watch List to monitor the level of these substances. Nowadays, the standard methods used to detect and quantify these contaminants are mainly liquid or gas chromatography coupled with mass spectrometry (LC/GC-MS).
View Article and Find Full Text PDFSe Pu
January 2024
College of Standardization, China Jiliang University, Hangzhou 310018, China.
Nitroaromatic compounds are used extensively in various fields such as dyes, pesticides, spices, pharmaceuticals, and explosives. However, the residual raw materials of these compounds accumulate in the environment and pose serious risks to human health. Chronic exposure to low concentrations of nitroaromatic compounds can cause anemia, cancer, and organ damage.
View Article and Find Full Text PDFPestic Biochem Physiol
December 2023
Innovation Center of Pesticide Research, Department of Applied Chemistry, College of Science, China Agricultural University, Beijing 100193, China. Electronic address:
Allatostatin (AS) or Allatotropin (AT) is a class of insect short neuropeptide F (sNPF) that affects insect growth and development by inhibiting or promote the synthesis of juvenile hormone (JH) in different insects. III-2 is a novel sNPF analog derived from a group of nitroaromatic groups connected by different amino acids. In this study, we found that III-2 showed high insecticidal activity against S.
View Article and Find Full Text PDFJ Fluoresc
July 2024
Key Laboratory of Science and Technology of Eco-Textiles, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, China.
Sensors play a critical role in the detection and monitoring of various substances present in our environment, providing us with valuable information about the world around us. Within the field of sensor development, one area that holds particular importance is the detection of small molecules. Small molecules encompass a wide range of organic or inorganic compounds with low molecular weight, typically below 900 Daltons including gases, volatile organic compounds, solvents, pesticides, drugs, biomarkers, toxins, and pollutants.
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