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Journal of Wuhan University of Technology(Materials Science) 2020年第2期35卷 280-286页

作者： HAN Wuli yan xuemin JIANG Yu PING Mei DENG Xiaoqing ZHANG yan College of Chemistry and Environmental Engineering Yangtze UniversityJingzhou 434023China

Nitrogen and sulfur co-doped porous nanocarbon (ZIF-C-N-S) catalyst was successfully synthesized derived from ZIF-8 and thiourea *** electrochemical measurements indicate that the as-obtained ZIF-C-N-S catalyst exhibits higher electrocatalytic activity for oxygen reduction reaction (ORR) in alkaline electrolyte and superior durability-longer than commercial Pt/C *** enhancment of electrocatalytic activity mainly be come from the open pore structure,large specific surface area as well as the synergistic effect resulted from the co-doping of N and S *** addition,the ZIF-C-N-S catalyst is also used as the air cathode catalyst in the microbial fuel cell (MFC) *** maximum power density and stable output voltage of ZIF-C-N-S based MFC are 1315 mW/m2 and 0.48 V,respectively,which is better than that of Pt/C based MFC.

关键词： electrocatalyst oxygen reduction reaction microbial fuel cells nitrogen and sulfur co-doped

Study on the Catalytic Reforming Law of Solid-Phase Carbon and Nitrogen Sources Loaded with MnO_(2)at Low Temperatures in Tahe Heavy Oil

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China Petroleum Processing & Petrochemical Technology 2023年第4期25卷 52-60页

作者： Tan Dichen Ma Zhaofei Peng Gaoyao Xiong Pan yan xuemin College of Chemistry and Environmental Engineering Yangtze UniversityJingzhouHubei 434023PR China

MnO_(2)/Melem composites were synthesized with MnO_(2)nanoparticles loaded onto the Melem using the hydrothermal *** raw materials for C and N carriers,Melem was prepared from melamine roasted at 354℃,and KMnO_(4)as a raw material for Mn,MnO_(2)nanoparticles were prepared using the hydrothermal synthesis of KMnO_(4).Scanning electron microscopy(SEM),transmission electron microscopy(TEM),X-ray diffraction(XRD),and a laser particle size analyzer were used for structural characterization,and the catalytic oxidation performance of the heavy oil was investigated at different reaction temperatures(100℃to 180℃)using MnO_(2)/Melem with an oxidant and donor protonic *** results showed that the synthesizedβ-MnO_(2)nanoparticles were successfully loaded onto the Melem surface;the oil samples before and after the reaction at different temperatures were subjected to SARA analysis using Fourier transform infrared(FT-IR),elemental analysis,gas chromatography-mass spectrometry(GC-MS)and viscosity tests,*** was determined that the hydrocarbons in the crude oil were converted to heavy mass by oxidation reactions with the oxidant mainly through a low-temperature oxidation process below 140℃in the heavy oil when the temperature exceeds 140℃,in addition to the oxidation reaction with the oxidant,a cleavage reaction in the carbon chain occurs to form hydrocarbon substances with lower molecular weights.

关键词： heavy oil catalyst low-temperature catalytic oxidation in situ reforming

Influence of Oxygen-Containing Functional Groups on Asphaltene Self-Diffusion Coefficient in Asphaltene-Xylene Systems

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China Petroleum Processing & Petrochemical Technology 2022年第2期24卷 118-125页

作者： yang Haiyang Wang Chunlu Ren Qiang Wang Lixin yan xuemin College of Chemistry&Environmental Engineering Yangtze UniversityJingzhou 434023 SINOPEC Research Institute of Petroleum Processing Beijing 100083

Molecular simulations were carried out to investigate the self-diffusion coefficient of asphaltene in asphaltene-xylene systems,used as heavy oil *** self-diffusion behavior of asphaltene in the asphaltene-xylene equilibrium system was mainly affected by the interaction between asphaltene molecules,with stronger interactions corresponding to a slower diffusion of *** interactions between asphaltene molecules mainly includedπ-πinteractions between aromatic rings and hydrogen bonds between strongly electronegative *** results are expected to provide theoretical guidance for reducing the viscosity of heavy oil.

关键词： heavy oil asphaltenes viscous mechanism molecular simulation molecular dynamics

Synthesis of Hierarchical Porous Fe_(2)O_(3)/Al_(2)O_(3) Materials and Study on Catalytic Viscosity Reduction of Heavy Oil

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China Petroleum Processing & Petrochemical Technology 2022年第4期24卷 98-107页

作者： Wu Peiyue Ma Zhaofei yang Haiyang Xiong Pan Tan Dichen yan xuemin College of Chemistry and Environmental Engineering Yangtze UniversityJingzhouHubei 434023PR China

Fe_(2)O_(3) nanoparticles were first dispersed in a sol solution containing an aluminum component introduced by an initial doping *** catalyst Hierarchical Porous Fe_(2)O_(3)/Al_(2)O_(3) materials(HPFA)were then synthesized through a sol-gel method via phase *** performance of HPFA was compared with that of Fe_(2)O_(3) nanoparticle *** structure of the composite catalyst was characterized by scanning electron microscopy,X-ray diffraction,N_(2) adsorption/desorption,and crush strength *** results showed that the Fe_(2)O_(3) nanoparticles could be loaded into the porous skeletons of Hierarchical Porous Al_(2)O_(3) materials(HPA)to achieve a uniform dispersion while avoiding agglomeration,which improved the mechanical strength of the porous materials *** HPFA was then used as a catalyst in the hydrothermal viscosity reduction process of Tuha heavy oil,and the viscosity reduction was *** viscosity reduction rate of HPFA was 81%,which was better than that of the Fe_(2)O_(3) nanoparticles(56%)and HPA(47%).

关键词： Fe_(2)O_(3) initial doping method hierarchical porous heavy oil viscosity reduction

Tellurium intervened Fe-N codoped carbon for improved oxygen reduction reaction and high-performance Zn-air batteries

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Journal of Materials Science & Technology 2023年第6期137卷 215-222页

作者： Rui Wang Zihan Meng xuemin yan Tian Tian Ming Lei Rami Adel Pashameah Hala MAbo-Dief Hassan Algadi Nina Huang Zhanhu Guo Haolin Tang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan 528200China College of Chemistry and Environmental Engineering Yangtze UniversityJingzhou 434023China State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876China Department of Chemistry Faculty of Applied ScienceUmm Al-Qura UniversityMakkah 24230Saudi Arabia Department of Science and Technology University College-RanyahTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Department of Electrical Engineering Faculty of EngineeringNajran UniversityP.O.Box 1988Najran 11001Saudi Arabia College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China Department of Chemical and Bimolecular Engineering Integrated Composites Laboratory(ICL)University of TennesseeKnoxvilleTN 37996USA Guangdong Hydrogen Energy Institute of WHUT Xianhu Hydrogen ValleyFoshan 528200China

Pyrolysis-acquired iron and nitrogen codoped carbon(Fe-N-C)has been comprehensively investigated for its promising oxygen reduction reaction(ORR)catalytic performance and structural *** modification of non-metal elements with larger atomic radius and the corresponding intrinsic microstructure-property relations are rarely *** this study,tellurium(Te)intervened Fe-N-C was prepared by micelles-induced polymerization with Te nanowires as an in-situ intervening *** out-plane bonding of Te with Fe induced the increase of both N content and proportion of pyridinic N on the material surface,thus improving the ORR catalytic *** assembled Zn-air battery demonstrated a maximum power density of 250 mW/cm^(2)and excellent rate capability under various discharge current densities,which was much better than the Pt/***,the current work demonstrates a novel Te/Fe-N-C material and reveals an original Te intervened Fe-N-C strategy and N reconfiguration mechanism,which is of great significance for the design of key materials in energy-related fields.

关键词： Te/Fe-N-C Assembly ORR Electrocatalysis Zn-air battery

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省级政府统筹下的教师教育一体化发展研究

教育科学 2019年第6期35卷 64-70页

作者：燕学敏中国教育科学研究院教师发展研究所北京100088

教师教育一体化是推进教师教育治理体系与治理能力现代化的显性载体,我国相继出台了一系列的有关加强教师教育一体化政策文件,各个地区也积极探索教师教育一体化的多种发展模式。但省级政府作为责任主体,在教师队伍建设中面临着主体角... 详细信息

教师教育一体化是推进教师教育治理体系与治理能力现代化的显性载体,我国相继出台了一系列的有关加强教师教育一体化政策文件,各个地区也积极探索教师教育一体化的多种发展模式。但省级政府作为责任主体,在教师队伍建设中面临着主体角色缺失、多维联动管理机制不畅等现实问题。为解决这些问题,应通过中央政府简政放权、加强省级政府主体统筹、构建协同发展共同体、探索与完善在省级政府主体驱动下的教师教育一体化管理模式、省级政府参与高等学校内部治理等措施来实现教师教育一体化发展。

关键词：教师教育省级统筹一体化

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北京市流动儿童不同学习需要的调查研究

中国特殊教育 2010年第10期 84-89页

作者：燕学敏中央教育科学研究所教师发展研究中心北京100088

流动儿童学习需要与城市儿童有所不同,本文通过对教学进度、教材、语言风俗、学习资源、接受信息的偏好方式、学习习惯等方面的调查研究,发现各地教材的使用、教学的进度存在差异,流动儿童语言差异较大、弥补方式各有不同;流动儿童与城... 详细信息

流动儿童学习需要与城市儿童有所不同,本文通过对教学进度、教材、语言风俗、学习资源、接受信息的偏好方式、学习习惯等方面的调查研究,发现各地教材的使用、教学的进度存在差异,流动儿童语言差异较大、弥补方式各有不同;流动儿童与城市儿童在学习资源获得上存在很大的差异,在认知形态、学习习惯方面差异不明显。针对流动儿童存在的问题,提出改进的意见与建议。

关键词：流动儿童城市儿童学习需要

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差异教学课堂观察指标体系的建构

教育科学研究 2022年第10期 59-65页

作者：燕学敏中国教育科学研究院教师发展研究所 100088

学生的学习效果与教师的教学行为和学生的学习行为密切相关。我国课堂观察指标存在师生评价分离的现象。为确保基础教育的高质量发展,建构一套注重过程性评价的师生活动行为观察指标体系,是教师因材施教的必要条件。依据差异教学策略,... 详细信息

学生的学习效果与教师的教学行为和学生的学习行为密切相关。我国课堂观察指标存在师生评价分离的现象。为确保基础教育的高质量发展,建构一套注重过程性评价的师生活动行为观察指标体系,是教师因材施教的必要条件。依据差异教学策略,遵循教学的实践逻辑,建构包含学情测查、优化起点、制定挑战性学习目标等八个二级指标的教学课堂观察指标,能够很好地诠释“双减”背景下,发挥课堂教学主阵地,培养学生自主学习能力,教师所应有的教学理念和教学行为。

关键词：差异教学课堂观察指标体系

Preparation and Electrochemical Performance Study on Flower-like SnO2@G Composite Anode Material

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Preparation and Electrochemical Performance Study on Flower-...

教师专业发展水平自我诊断指标体系的建构与实施

第二届湖北省化学化工青年科学家论坛

作者： Dan Gao Chang Miao xuemin yan Wei Xiao School of Chemistry and Environmental Engineering Yangtze University

The porous flower-like nano-structure SnO powders are successfully synthesized at 160 ℃ for 12 h by hydrothermal method, and followed by being heated at 500 ℃ for 3 h to be completely oxidized. The charge-discharge tests show that the initial discharge capacity of the porous flower-like SnO nanostructures is 1652.4 mAh g and the first charge capacity is 1024.5 mAh g with the coulomb efficiency about 62.0 % at 100 mA g. However, the discharge capacity has rapidly dropped to 635 mAh g after 20 cycles at the same situation, which presents a poor cycle stability. To improve the cycle stability, graphene(G) is firstly prepared by hummers method, and then porous flower-like SnO nanostructures are coated with G to prepare the SnO@G composite anode material. The G content influence on the electrochemical performance of the composite material is investigated, and the results show that the composite coated with 30 % G presents excellent electrochemical cycling performance, in which the reversible specific capacity remains 513 mAh g after 90 cycles at a current density of 100 mA g.

关键词： Porous flower-like structure SnO2@G Composite anode material Lithium ion battery

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教育科学研究 2023年第11期 52-59页

作者：燕学敏梅红中国教育科学研究院教师发展研究所 100088 岭南师范学院教育科学学院 524000

根据现场观察、实地访谈和参考国内外优秀教师专业特征的研究文献,通过专家函询法距离建构我国中小学教师专业发展水平的各级指标,最终形成了5项一级指标、14项二级指标和37项三级指标。再通过层次分析法确定教师专业水平自我诊断的各... 详细信息

根据现场观察、实地访谈和参考国内外优秀教师专业特征的研究文献,通过专家函询法距离建构我国中小学教师专业发展水平的各级指标,最终形成了5项一级指标、14项二级指标和37项三级指标。再通过层次分析法确定教师专业水平自我诊断的各级指标和权重。经过实践检验,自评量表信度和效度非常高,既能够发现区域教师发展的成就,也能够发现区域教师发展的整体问题,既能够为区域教师精准培训提供参考标准和教师聘用的前期筛查,也能够为教师个体发展提供精准的诊断数据。

关键词：教师专业发展水平自我诊断指标体系