Green Chemical Engineering
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2022
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IF 0
Pei-Lin Yi,Wen-Jie Zhang,Ling-Hui Kong,Rong-Fang Shen,Xiao-Jing Guo,Xi Yan,Yan Chen,Wan-Zhong Lang
Herein, we demonstrated that various activated carbons could be endowed with high ability activating peroxymonosulfate (PMS) just through pyrolysis for the degradation of various organic pollutants. The ofloxacin (OFX) was proved to be degraded rather than adsorbed in the advanced oxidation processes. The catalyst showed good stability and could be recovered by simple pyrolysis showing the initial activity. The defects were identified as active sites of the catalyst, and π-π∗ shake up was related to the catalyst activity. Mediated electron transfer was verified to be responsible for the degradation of OFX. The inhibition effect of furfuryl alcohol (FFA) on the degradation of contaminant was proved to be insufficient to verify 1 O 2 . The main OFX degradation intermediates were identified by LC-MS, and possible degradation pathways were proposed. This study provided a simple way for the development of low-cost, metal-free, and high-efficient carbonaceous materials to activate PMS in advanced oxidation processes, and proposed new insights for the exploration of PMS activation mechanism.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
JOURNAL OF MOLECULAR LIQUIDS
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2024
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IF 5.3
Erkang Li,Yujie Zhen,Lu Chen,Xuqiang Li,Lei Li,Wenxue Lu,Tao Li,Qingsong Li,Yingmin Yu
Pyridine compounds play a crucial role in the synthesis of fine chemicals and pharmaceuticals; however, the generation of a large amount of wastewater may pose a threat to the ecological environment and human health. Considering environmental factors and economic benefits, it is essential to explore efficient methods for separating pyridine compounds from water. In this study, pyridine compounds were separated from water by liquid–liquid extraction using MIBK as solvent. Liquid-liquid equilibrium (LLE) data for the ternary system water + pyridine compounds(pyridine, 2-methylpyridine, 3-methylpyridine, 2,6-dimethylpyridine, and 2,4,6-trimethylpyridine) + MIBK were measured at 303.2 K and 101.3 kPa. Subsequently, the distribution coefficient ( D ) and separation factor ( S ) were calculated based on the obtained data, serving as indicators to evaluate the performance of the extractant. The LLE data were then correlated with NRTL and UNIQUAC models to obtain binary interaction parameters. The accuracy of the regressed binary interaction parameters was assessed through Gibbs energy topology analysis. To explore the intrinsic mechanism of extraction between MIBK and pyridine or alkylpyridines, the σ-profile was used to investigate the interaction form between MIBK and pyridine or alkylpyridines. Based on this, quantum chemical calculations and wave function analysis were used to reveal the molecular-level separation mechanism. The interaction behavior of the MIBK and pyridine or alkylpyridines systems was systematically investigated. The results indicate that van der Waals forces are the main intermolecular interactions , and it is through these strong forces that MIBK can efficiently separate pyridine and alkylpyridines from water.
研究领域:
环境科学
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物理化学
✓ 已验证
产品关联
DOI
高影响因子
STAR Protocols
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2022
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IF 0
Cong Niu,Jianjing Yang,Kelu Yan,Jiafang Xie,Wei Jiang,Bingwen Li,Jiangwei Wen
Here, we present a protocol to decyanopyridate inert N-heterocycles access to N-fused heterocycles via the mechanism of dual proton-coupled electron transfer (PCET). We describe a detailed guide to performing an electrochemical gram-scale protocol for decyanopyridation of inert N-heterocycles. The desired pyridylated quinolone is synthesized in a 5.0 mmol scale with a yield of 76%. The protocol is limited to cyanopyridines. For complete details on the use and execution of this protocol, please refer to Niu et al. (2022) .
研究领域:
有机化学
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电化学
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合成化学
✓ 已验证
DOI
PubMed
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Wenzi Liang,Chang-An Xu,Limin Man
The use of biomass material to modify nanomaterials is an effective way to enhance the anti-corrosion properties of coatings. In this work, modify graphene oxide (GO) and pyridinized graphene oxide (TGO) using lignin through D-A reaction, and then combined with resin to prepare a composite coating with excellent anti-corrosion properties under thermal polymerization. The results showed that after being soaked in salt water for 120 days, the impedance modulus of the lignin grafted TGO-based composite coating was two orders of magnitude higher than that of the control group, and its anti-corrosion performance was superior to that of the lignin grafted GO-based composite coating. Molecular dynamics simulations showed that the presence of pyridine groups promoted the directional arrangement of GO, with an orientation angle of 10°. This made the diffusion path of the corrosive medium in the coating more tortuous, thereby prolonging the service life of the metal. Scratch experiments showed that lignin grafted TGO-based composite coating had fewer corrosion products at the scratch site and exhibited excellent self-healing anti-corrosion properties. This work not only provided a new preparation method for modifying nanomaterials with lignin, but also offered a reference for the design of sustainable self-healing anti-corrosion coatings.
研究领域:
材料科学
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纳米技术
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表面工程
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腐蚀科学
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高分子科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）