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Theoretical insights into the degradation mechanisms, kinetics and eco-toxicity of oxcarbazepine initiated by OH radicals in aqueous environments

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Journal of Environmental Sciences 2023年第7期129卷 189-201页

作者： yanhui sun Ming Li Mohammad Hassan Hadizadeh Lin Liu Fei Xu College of Environment and Safety Engineering Qingdao University of Science and TechnologyQingdao 266042China Environment Research Institute Shandong UniversityQingdao 266237China

As an anticonvulsant,oxcarbazepine(OXC)has attracted considerable attention for its potential threat to aquatic *** functional theory has been used to study the mechanisms and kinetics of OXC degradation initiated by OH radicals in aqueous environment.A total of fourteen OH-addition pathways were investigated,and the addition to the C8 position of the right benzene ringwas themost vulnerable pathway,resulting in the intermediate *** H-abstraction reactions initiated by OH radicalswere also explored,where the extraction site of the methylene group(C14)on the seven-member carbon heterocyclic ring was found to be the optimal *** calculations show that the total rate constant of OXC with OH radicals is 9.47×10^(9)(mol/L)^(−1)sec^(−1),and the half-life time is 7.32 s at 298 K with the[·OH]of 10^(−11) mol/***,the branch ratio values revealed that OH-addition(89.58%)shows more advantageous than H-abstraction(10.42%).To further understand the potential eco-toxicity of OXC and its transformation products to aquatic organisms,acute toxicity and chronic toxicity were evaluated using ECOSAR *** toxicity assessment revealed that most degradation products such as OXC-2OH,OXC-4OH,OXC-1O-1OOH,and OXC-1OH’are innoxious to fish and ***,green algae are more sensitive to these *** study can provide an extensive investigation into the degradation of OXC by OH radicals and enrich the understanding of the aquatic oxidation processes of pharmaceuticals and personal care products(PPCPs).

关键词： Oxcarbazepine OH radicals Degradation mechanisms Kinetic calculation Eco-toxicity evaluation

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Investigation on Coal-Oxygen Scrap Melting Process

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International Journal of Minerals,Metallurgy and Materials 1998年第2期12卷 61-64页

作者： Rong Xhu yanhui sun Yongquan Qiu Metallurgy School, UST Beijing, Beijing 100083, China Metallurgy School UST Beijing Beijing 100083 China

Investigation on the coal-oxygen scrap melting process shows that using internal-combustion coal-oxygen burner to melt scrap is feasible. Among four types of coal-oxygen furnaces-oxygen burner melting furnace is better than other types on the quotas of process. The metal yield is 95%～97%, the melt down carbon and sulphur contents are >1.0% and <0.080% respectively for this melting furnace. The coal-oxygen scrap melting process would have a significant effect on the technological transformation of EAF and BOF in China.

关键词： scrap melting coal-oxygen burner steelmaking

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Fast electrochemical activation of the broadband saturable absorption of tungsten oxide nanoporous film

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Nano Research 2022年第1期15卷 326-332页

作者： Ruipeng Hou Hui Li Mengjuan Diao yanhui sun Ying Liang Zhiyang Yu Zhipeng Huang Chi Zhang School of Chemical Science and Engineering Tongji UniversityShanghai 200092China State Key Laboratory of Photocatalysis on Energy and Environment College of ChemistryFuzhou UniversityFuzhou 350002China

The on-demand modulation of defects in materials for the effective modulation of optical nonlinearity is desirable,while it remains a great *** this work,we demonstrate that electrochemical activation is a facile and convenient approach to modulating the broadband third-order nonlinear absorption of nanoporous tungsten oxide(WO3-x)thin *** film does not exhibit optical nonlinearity at the initial state,while shows a distinct saturable absorption under an applied voltage of-2.5 V with the excitation of 515,800,and 1,030 nm *** nonlinear absorption coefficient(β_(eff))is-766.38±6.67 cm·GW^(-1) for 1,030 nm laser,-624.24±17.15 cm·GW-1 for 800 nm laser,and-120.70±11.49 cm·GW^(-1) for 515 nm laser,and the performance is competitive among inorganic saturable *** activation is accomplished in 2 *** performance enhancement is ascribed to the formation of abundant in-gap defect states because of the reduction of the tungsten atoms,and a Pauli-blocking effect occurs during the excitation of in-gap defect *** small feature size of WO_(3-x)(-12 nm)enables the effective and fast introduction and removal of the defects in porous film,and accordingly the fast and broadband modulation of optical *** results suggest a controllable,effective,and convenient approach to tuning the nonlinear absorption of materials.

关键词： tungsten oxide nonlinear absorption in-gap states electrochemical activation

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Research and Application of Internal Combustion Coal-Oxygen Burner for Fluxing in EAF

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Journal of Iron and Steel Research International 1999年第1期6卷 23-26页

作者： Zhu Rong sun yanhui Qiu Yongquan Ouyang Guang Chen Haiping Guo Changhua University of Science and Technology Beijing Xinyu Iron and Steel Company

The investigation shows that using internal combustion coal-oxygen burner for the intensification of melting in EAF is *** combustion coal-oxygen burner is better than external combustion coal-oxygen burner in the performance and energy saving of the *** consumption is decreased by 40 kW ? h/t,melting time is shortened by 18 *** application of internal combustion coal-oxygen burner has a significant effect on decreasing EAF energy consumption.

关键词： EAF coal-oxygen burner internal combustion energy saving

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Lotus root-like RuIr alloys with close-packed(0001)branches:Strain-driven performance for acidic water oxidation

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Journal of Energy Chemistry 2024年第5期92卷 579-590页

作者： Mingyue Xiao Wanli Xu Rongchao Li yanhui sun Jingjun Liu Feng Liu Jun Gan Shixin Gao Beijing Key Laboratory of Electrochemical Process and Technology for Materials Beijing University of Chemical TechnologyBeijing 100029China Yunnan Precious Metals Lab Kunming 650100YunnanChina

Achieving composition tunability and structure editability of nanoalloys with high level strain may be an efficient strategy to remarkably boost catalytic performance toward oxygen evolution reaction(OER)in acidic water ***,lotus root-like RuIr alloys with native micro-strain were constructed by an epitaxial growth of Ru-richened hcp-(0001)branches on Ir-richened fcc-(111)seeds using a polyol thermal synthesis *** resultant Ru_(60)Ir_(40) alloy shows an OER overpotential of 197 mV at 10 mA cm^(-2) and a Tafel slope of 46.59 mV dec^(-1),showing no obvious activity decay for 80 h continuous chronopotentiometry test in 0.5 M H_(2)SO_(4).The related characterizations including X-ray absorption fine structure(XAFS)spectroscopy and density functional theory(DFT)calculations show that that the remarkably improved activity of the lotus root-like alloy can be attributed to the(0001)facet-triggered strain,which can efficiently optimize the electronic band structure of the active metal and the weakening of the chemisorption of oxygen-containing substances to boost OER ***,this work provides a new strategy to designing a class of advanced electrocatalysts with high strain using diverse nanostructures as building materials for carbon-free clean energy conversion systems.

关键词： Rulr alloy Lotusroot-like structure Strain Oxygene volution reaction Activity

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Partial oxidation of methane by photocatalysis

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Chinese Chemical Letters 2024年第1期35卷 153-168页

作者： Zhongshan Yang Qiqi Zhang Hui Song Xin Chen Jiwei Cui yanhui sun Lequan Liu Jinhua Ye TJU-NIMS International Collaboration Laboratory School of Materials Science and EngineeringTianjin UniversityTianjin 300072China International Center for Materials Nanoarchitectonics(WPI-MANA) National Institute for Materials Science(NIMS)1-1 NamikiIbaraki 3050047Japan Zhejiang LAMP Co. Ltd.Wenzhou 325206China

Methane chemistry is one of the“Holy Grails of catalysis”.It is highly desirable but challenge to transform methane into value-added chemicals,because of its high C-H bonding energy(435 kJ/mol),lack ofπbonding or unpaired ***,commercial methane conversion is usually carried out in harsh conditions with enormous energy *** partial oxidation of methane to liquid oxygenates(PPOMO)is a future-oriented technology towards realizing high efficiency and high selectivity under mild *** selection of oxidant is crucial to the PPOMO ***,attentions are paid to the research progress of PPOMO with various oxidants(O_(2),H_(2)O,H_(2)O_(2)and other oxidants).Moreover,the activation of the selected oxidants is also highly ***,we summarized the methane activation mechanisms focusing on the C-H bond that was broken mainly by·OH radical,O-specie or photogenerated hole(h+).Finally,the challenges and prospects in this subject are briefly discussed.

关键词： Partial oxidation of methane Photocatalysis Liquid oxygenates Oxidants C-H activation

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A novel mitochondria-targeting tetrapeptide for subcellular delivery of nanoparticles

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Chinese Chemical Letters 2019年第7期30卷 1435-1439页

作者： yanhui sun Aiyan Zhan Shuang Zhou Xiao Kuang Hongyan Shen Hongzhuo Liu Youjun Xu School of Pharmaceutial Engineering Key Laboratory of Structure-Based Drug Design & Discovery(Ministry of Education) Shenyang Pharmaceutical University Shenyang 110016 China Wuya College of Innovation Shenyang Pharmaceutical University Shenyang 110016 China

Mitochondrial dysfunction is associated with the emergence of several neurological and cardiovascular diseases. Hence, mitochondria-targeting delivery strategies are highly significant and critically needed. In this study, we developed a small library of peptides simulating the mitochondria-targeting peptide SS-31, a promising tetra-peptide with antioxidant character, and subsequently evaluated the toxicity, antioxidant ability and mitochondrial delivery of nanoparticles. Among the designed peptides, RF-2 (DArg-Dmt-Arg-Phe-NH2) showed controlled toxicity and excellent protection against gentamicin-induced hair cell damage, as compared with SS-31. More importantly, RF-2-modified PLGA nanoparticles demonstrated high colocalization with mitochondria and comparable specific subcellular accumulation, when compared with SS-31. Taken together, the obtained results supported RF-2 as a mitochondriatargeting peptide with high potential as a targeted carrier.

关键词： Mitochondrial targeting Peptide SS-31 Toxicity Nanoparticles Zebrafish

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Fast Evaluation Peanut Oil Quality by Synchronous Fluorescence Spectroscopy and Statistical Analysis

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Agricultural Sciences 2021年第5期12卷 565-574页

作者： Weiwei Zhang Riqin Lv yanhui sun Haiyang Gu School of Biotechnology and Food Engineering Chuzhou University Chuzhou China

Peanut oil oxidation was to monitor and quantify combining synchronous fluorescence spectroscopy and chemometrics. Peanut oil was subjected to an accelerated oxidation testing. The spectral and related chemical indicators were caught during oxidation induce testing. Fluorescence spectra were gained for each sample with simultaneous excitation from 200 to 800 nm and the offsets (Δλ) of 10 to 180 nm during the oxidation process. The results showed the induce period (IP) of the peanut oil was 16.45 h. Parallel factor analysis (PARAFAC) was performed to select the best Δλ interval of 70 nm, which spectral data was the most suitable for interval partial least square (iPLS) and synergy interval PLS (siPLS) modeling and forecast. The study presented all interval selection methods had the better results than the global spectrum modelling. iPLS reached the best into 10 intervals with a ratio of prediction to deviation (RPD) of 2.10. siPLS that separated the whole spectrum into 15 intervals and combined the third intervals (282 to 320 nm, 362 to 400 nm, and 761 to 800 nm) had a ratio of RPD of 2.26. The results showed the optimal siPLS model performed a little better than iPLS. The established model lying on interval selection could improve the prediction accuracy. It could provide a quick, accurate method to monitor oil oxidation process.

关键词： Synchronous Fluorescence Spectroscopy Peanut Oil Oxidation Stability Chemometrics

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STUDIES ON THE REACTION MECHANISM OF ORGANIC HYDROPEROXIDE AND AMINE SYSTEM INITIATED POLYMERIZATION

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Science in China,Ser.B 1984年第4期27卷 349-360页

作者：孙燕慧丘坤元冯新德 Department of Chemistry Peking University

The initiation mechanism of organic hydroperoxide and amine system has been investigatedsystematically in this paper. It has been confirmed from the IR spectra that organic hydro-peroxide could form hydrogen-bonded complex with amine. The reactive intermediate of theamine and its effect on initiating polymerization have been determined by using ESR techni-que, and further proved by the results of polymer end group analysis and graft copolymeri-zation of vinly monomer onto the amino-containig polymer. Finally, water, as one of the finalproducts of ROOH-amine reaction has been detected through chromatographic analysis, fromwhich the conversion reaction of the reactive intermediate is verified.

关键词： DMT TB STUDIES ON THE REACTION MECHANISM OF ORGANIC HYDROPEROXIDE AND AMINE SYSTEM INITIATED POLYMERIZATION PMMA NDMA

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稀土卤素气态配合物热力学性质的研究

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化学进展 2006年第6期18卷 727-733页

作者：陈华妮孙艳辉华南师范大学化学与环境学院广州510631

本文对稀土卤素气态配合物LnMnX3n+3(M=Al、Fe;X=Cl、Br)和ALnX4(A=碱金属;X=Cl、I)的热力学性质、研究方法及其在稀土分离制备方面的应用进行了综述,并对其今后的研究及应用进行了展望。

关键词：稀土卤素气态配合物热力学性质

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