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Preparation of Different Lights Irradiated ZnSe/GSH QDs and Their Interaction with BSA

Journal of Wuhan University of Technology(Materials Science) 2019年第4期34卷 858-865页

作者： DING Ling LI Shiqian The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology Wuhan 430081China Coal Conversion and New Carbon Materials Hubei Key Laboratory School of Chnemistry and Chemical EngineeringWuhan University of Science and TechnologyWuhan 430081China Key Laboratory of Measurement and Control System for Offshore Environment Fuqing Branch of Fujian Normal UniversityFuqing 350300China

Using L-glutathione(GSH) as a capping agent,Zn Se/GSH quantum dots(QDs) were prepared under microwave irradiation and irradiated under dark, ultraviolet light and incandescent light, respectively. The properties and interaction of different lights irradiated ZnSe/GSH QDs and bovine serum albumin(BSA) were studied systematically. The fluorescence(FL) spectra results reveal that the quenching mechanism are all the static quenching in nature. The quenching constant(Ksv) and binding constant(K) value of different irradiated Zn Se/GSH QDs and BSA all increased with the change of light types from dark to incandescent light and UV light. The number of binding site(n) is close to 1 at different temperatures. The lighting types influence the enthalpy and entropy changes. The Fourier transform infrared(FTIR) spectra indicate that the light induced GSH ligand will facilitate photocatalytic oxidation on the surface of ZnSe/GSH QDs. The circular dichroism(CD)results show that the α-helicity content of BSA decreases from 60.34%, 59.31%, to 58.79% under UV lighting,incandescent lighting and dark conditions. The interaction results of different lights illuminated ZnSe/GSH QDs with BSA by CD spectra method matches well with that by FL and FTIR spectra. That is, the interaction of ZnSe/GSH QDs and BSA from strong to weak is UV light, incandescent light and dark in sequence.

关键词： lights irradiated ZnSe/GSH quantum dots preparation bovine serum albumin interaction thermodynamics

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Formation of secondary inorganic aerosol in a frigid urban atmosphere

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Frontiers of environmental Science & Engineering 2022年第2期16卷 39-50页

作者： Yuan Cheng Qinqin Yu Jiumeng Liu Youwen Sun Linlin Liang Zhenyu Du Guannan Geng Wanli Ma Hong Qi Qiang Zhang Kebin He State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China Key Laboratory of Environmental Optics and Technology Anhui Institute of Optics and Fine MechanicsChinese Academy of SciencesHefei 230031China State Key Laboratory of Severe Weather&CMA Key Laboratory of Atmospheric Chemistry Chinese Academy of Meteorological SciencesBeijing 100081China National Research Center for Environmental Analysis and Measurement Environmental Development Center of the Ministry of Ecology and EnvironmentBeijing 100029China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Department of Earth System Science Tsinghua UniversityBeijing 100084China

Formation of secondary inorganic aerosol(SIA)was investigated during a six-month long heating season in Harbin,*** sulfate formation was observed at high relative humidity(RH),with the same threshold RH(80%)for both colder and warmer measurement *** to wintertime results from Beijing,the threshold RH was considerably higher in Harbin,whereas the RH-dependent enhancement of sulfur oxidation ratio(SOR)was less *** addition,the high RH events were rarely encountered,and for other periods,the SOR were typically as low as~***,the sulfate formation was considered inefficient in this *** excluding the several cases with high RH,both SOR and the nitrogen oxidation ratio(NOR)exhibited increasing trends as the temperature increased,with the increase of NOR being *** nitrate to sulfate ratio tended to increase with increasing temperature as *** on a semi-quantitative approach,this trend was attributed primarily to the temperature-dependent variations of precursors including SO_(2) and NO_(2).The influence of biomass burning emissions on SIA formation was also *** stronger impact of biomass burning,an enhancement in NOR was observed whereas SOR was largely *** different patterns were identified as the dominant driver of the larger nitrate to sulfate ratios measured at higher concentrations of fine particulate matter.

关键词： Haze Sulfate Nitrate Heterogeneous chemistry Biomass burning

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Maghemite(γ-Fe_2O_3) nanoparticles enhance dissimilatory ferrihydrite reduction by Geobacter sulfurreducens: Impacts on iron mineralogical change and bacterial interactions

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Journal of environmental Sciences 2019年第4期31卷 193-203页

作者： Zheng Chen Yaxian Zhang Qingliu Luo Liuying Wang Shurui Liu Yajuan Peng Haitao Wang Liang Shen Qingbiao Li Yuanpeng Wang Department of Chemical and Biochemical Engineering College of Chemistry and Chemical EngineeringXiamen University Department of Environmental Science School of Environmental Science and EngineeringTan Kah Kee CollegeXiamen University Key Laboratory of Measurement and Control System for Coastal Environment Fuqing Branch of Fujian Normal University Zhejiang Provincial Key Laboratory of Watershed Science and Health School of Public Health and ManagementWenzhou Medical University

Microbially mediated bioreduction of iron oxyhydroxide plays an important role in the biogeochemical cycle of *** sulfurreducens is a representative dissimilatory ironreducing bacterium that assembles electrically conductive pili and *** impact of supplementation withγ-Fe_2O_3 nanoparticles(NPs)(0.2 and 0.6 g)on the ***-mediated reduction of ferrihydrite was *** the overall performance of microbial ferrihydrite reduction mediated byγ-Fe_2O_3 NPs,stronger reduction was observed in the presence of direct contact withγ-Fe_2O_3 NPs than with indirect *** to the production of Fe(Ⅱ)derived from biotic modification with ferrihydrite alone,increases greater than 1.6-and 1.4-fold in the production of Fe(Ⅱ)were detected in the biotic modifications in which direct contact with 0.2 g and 0.6 gγ-Fe_2O_3 NPs,respectively,occurred.X-ray diffraction analysis indicated that magnetite was a unique representative iron mineral in ferrihydrite when active *** cells were in direct contact withγ-Fe_2O_3 *** of the sorption of biogenic Fe(Ⅱ)ontoγ-Fe_2O_3 NPs instead of ferrihydrite,the addition ofγ-Fe_2O_3 NPs could also contribute to increased duration of ferrihydrite reduction by preventing ferrihydrite surface ***,electron microscopy analysis confirmed that the direct addition ofγ-Fe_2O_3 NPs stimulated the electrically conductive pili and cytochromes to stretch,facilitating long-range electron transfer between the cells and *** obtained findings provide a more comprehensive understanding of the effects of iron oxide NPs on soil biogeochemistry.

关键词： Iron Ferrihydrite Nanoparticles Reduction Geobacter sulfurreducens

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Synthesis of Agomelatine by One-pot Catalytic Hydrogenation and Acetylation with NiO

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Journal of Wuhan University of Technology(Materials Science) 2019年第2期34卷 453-458页

作者： YU Zhijun CHENG Zhengzai XIE Cong ZENG Sheng DENG Haiying LIU Panpan HU Hai LI Guangyao DING Ling Mario Gauthier LI Shiqian School of Medicine Wuhan University of Science and TechnologyWuhan 430065China Non-power Nuclear Technology Research and Development Center Hubei University of Science and TechnologyXianning 437100China The State Key Laboratory of Refractories and Metallurgy(Wuhan University of Science and Technology) Wuhan 430081China Coal Conversion and New Carbon Materials Hubei Key Laboratory School of Chemistry and Chemical EngineeringWuhan University of Science and TechnologyWuhan 430081China Key Laboratory of Measurement and Control System for Offshore Environment Fuqing Branch of Fujian Normal UniversityFuqing 350300China

Nano-NiO and bulk NiO were prepared from Ni(AC)_2·4 H_2O by coordination precipitation using aqueous ammonia and by a solid state reaction, respectively. The nickel oxide particles were characterized by X-ray Diffraction(XRD) and scanning electron microscopy(SEM). The results indicate that nano-sized NiO has a crystal phase with a standard face-centered cubic lattice structure, with a mean particle diameter of about 10 nm. The evaluation of the activity of nickel oxide nanoparticles in the catalytic hydrogenation of 7-methoxy-1-naphthylacetonitrile was carried out. The results demonstrate the efficient synthesis of the title compound by a one-pot catalytic hydrogenation and acetylation with NiO. The NiO nanoparticles displayed superior catalytic activity in the synthesis of agomelatine in the one-pot *** total yield of agomelatine is over 81.8% with a purity of 99.2%, as determined by HPLC. The structure of agomelatine was confirmed by IR, MS, and 1 H NMR analysis.

关键词： nano-NiO homogeneous precipitation method catalytic hydrogenation agomelatine N-[2-(7-Methoxy-1-naphthyl)ethyl]acetamide 7-Methoxy-1-naphthylacetonitrile

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Modeling and simulation of behind-casing reservoir detection based on line source 4

Modeling and simulation of behind-casing reservoir detection...

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4th International Conference on Intelligent control, measurement and Signal Processing, ICMSP 2022

作者： Dang, Bo Fang, Xiangteng Dang, Jingxin Hao, Xining Shaanxi Key Laboratory of Measurement and Control Technology for Oil and Gas Wells Xi'an Shiyou University Xi'an China University of Electronic Science and Technology of China School of Resources and Environment Chengdu China Research Institute of China National Offshore Oil Corporation Beijing China

ISBN: (数字)9781665486583

ISBN: (纸本)9781665486583

In order to monitor the changes of oil and gas reservoirs in different development stages and meet the requirements of high resolution and long-distance detection for reservoir detection, a three-dimensional radial stratification model based on line source is established in this paper. The effects of radial distance and formation conductivity at different times on the magnetic field strength around the line source, as well as the line source current and relative magnetic permeability of the line source on the detection distance are studied by finite element analysis. The results show that the signal intensity of secondary field at different time has a certain law and corresponding relationship with reservoir conductivity and radial distance. Within a certain range, the larger the current applied to the line source with smaller relative permeability, the stronger the secondary field signal obtained. The research results have certain reference value for the online monitoring of behind-casing reservoir. © 2022 IEEE.

关键词： Finite element method

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Dissecting the contributions of organic nitrogen aerosols to global atmospheric nitrogen deposition and implications for ecosystems

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National Science Review 2023年第12期10卷 124-136页

作者： Yumin Li Tzung-May Fu Jian Zhen Yu Xu Yu Qi Chen Ruqian Miao Yang Zhou Aoxing Zhang Jianhuai Ye Xin Yang Shu Tao Hongbin Liu Weiqi Yao Shenzhen Key Laboratory of Precision Measurement and Early Warning Technology for Urban Environmental Health Risks School of Environmental Science and Engineering Southern University of Science and Technology Guangdong Provincial Observation and Research Station for Coastal Atmosphere and Climate of the Greater Bay Area Southern University of Science and Technology Division of Environment and Sustainability Hong Kong University of Science and Technology National Center for Applied Mathematics Shenzhen Department of Chemistry Hong Kong University of Science and Technology State Key Joint Laboratory of Environmental Simulation and Pollution Control International Joint Laboratory for Regional Pollution Control College of Environmental Sciences and Engineering Peking University Frontier Science Center for Deep Ocean Multispheres and Earth System and Physical Oceanography Laboratory Ocean University of China College of Oceanic and Atmospheric Sciences Ocean University of China Department of Ocean Science Hong Kong University of Science and Technology Department of Ocean Science and Engineering Southern University of Science and Technology

Atmospheric deposition of particulate organic nitrogen（ONp） is a significant process in the global nitrogen cycle and may be pivotally important for N-limited ***,past models largely overlo oked the spatial and chemical inhomogeneity of atmospheric ONpand were thus deficient in assessing global *** constructed a comprehensive global model of atmospheric gaseous and particulate organic nitrogen（ON）,including the latest knowledge on emissions and secondary *** this model,we simulated global atmospheric ONpabundances consistent with *** estimated global atmospheric ON deposition was 26 Tg N yr-1,predominantly in the form of ONp(23 Tg N yr-1)and mostly from wildfires（37%）,oceans（22%） and aqueous productions（17%）.Globally,ONpcontributed as much as 40% to 80% of the total N deposition downwind of biomass-burning *** ONpdeposition thus constituted the dominant external N supply to the N-limited boreal forests,tundras and the Arctic Ocean,and its importance maybe amplified in a future warming climate.

关键词： organic nitrogen aerosol secondary organic nitrogen biomass burning

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In-Situ Facile Synthesis of Heterostructural Co||Mnco2o4.5/Nc with Active Oxygen Vacancies and its Bifunctional Electrocatalysis for Oxygen Reduction and Oxygen Evolution Reaction

SSRN

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SSRN 2022年

作者： Cai, Jiannan Zhang, Xiaofeng Ye, Yanzhu Shi, Yuande Lin, Shen College of Chemistry & Materials Science Fujian Normal University Fuzhou350007 China Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering Fuzhou350007 China Fujian Key Laboratory of Polymer Materials Fujian Normal University Fuzhou350007 China Key Laboratory of Measurement and Control System for Coastal Environment Fujian Polytechnic Normal University Fuzhou350300 China

A potential non-noble metal oxide catalyst with its low-cost and efficient catalytic ability attract increasing attention. In this paper, a highly efficient bifunctional electrocatalyst Co-MnCo2O4.5/NC with heterostructure and oxygen vacancies is prepared utilizing solid reaction in-situ . The optimal catalyst is obtained at 650 ℃ with the mass ratio (1:8) of MnCo2O4.5 and Dicyandiamide (DCD). It shows excellent electrocatalytic activity for oxygen reduction reaction (ORR) with high half-wave potential (0.81 V) and limit current density (6.22 mA cm-2 ), which is better than that of the commercial 20% Pt/C(0.81 V, 5.52 mA cm-2 ). At the same time, it also has superior electrocatalytic activity for oxygen evolution reaction (OER) with low overpotential (330 mV) and a faster dynamics process. The superior electrocatalytic properties may resulted from the presence of heterostructure and increasing ratio of oxygen vacancies, which helps to the rapid transfer of electrons and creates more active sites. Moreover, the self-generated N-doped carbon provides high conductivity of the as-prepared Co-MnCo2O4.5/NC composite. It can be seen that the application of interface engineering technologies is useful for improving the performance of the catalyst, providing an effective and facile synthesis strategy for non-noble metal catalyst. © 2022, The Authors. All rights reserved.

关键词： Oxygen vacancies

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