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Graphitic carbon nitride based single-atom photocatalysts

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Frontiers of physics 2020年第3期15卷 13-26,M0001页

作者： junwei fu Shuandi Wang Zihua Wang Kang Liu Huangjingwei Li Hui Liu Junhua Hu Xiaowen Xu Hongmei Li Min Liu School of Physics and Electronics State Key Laboratory of Powder MetallurgyHunan Provincial Key Laboratory of Chemical Power SourcesCentral South UniversityChangsha410083China School of Metallurgy and Environment Central South UniversityChangsha410083China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou450002China

Single-atom photocatalysts,due to their high catalysis activity,selectivity and stability,become a hotspot in the field of *** carbon nitride(g-C3N4)is known as both a good support for single atoms and a star *** g-C3N4-based single-atom photocatalysts exhibits great potential in improving the photocatalytic *** this review,we summarize the recent progress in g-C3N4-based single-atom photocatalysts,mainly including preparation strategies,characterizations,and their photocatalytic *** significant roles of single atoms and catalysis mechanism in g-C3N4-based single-atom photocatalysts are *** last,the challenges and perspectives for exploring high-efficient g-C3N4-based single-atom photocatalysts are presented.

关键词： graphitic carbon nitride single atoms atomically dispersed sites site-isolated catalysts photocatalysis

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大型法兰组装焊接时翘曲变形现象分析

热加工工艺 2011年第5期40卷 187-188页

作者：付君伟黑龙江交通职业技术学院黑龙江齐齐哈尔161002

通过对大型法兰组装焊接时翘曲变形实例的分析,说明了发生这种变形的原因,并给出了防止此类变形的措施。

关键词：设备法兰切向应力翘曲变形

B439铁素体不锈钢凝固过程中TiN析出热力学分析

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机械工程学报 2020年第18期56卷 73-80页

作者：董旭光付俊伟沈阳理工大学材料科学与工程学院沈阳110159 合肥工业大学材料科学与工程学院合肥230009

虽然TiN析出热力学已有较为广泛的研究,但TiN异质形核热力学报道较少。TiN热力学计算表明,TiN不会在熔炼过程中析出,凝固过程中Ti和N元素被逐渐排到固、液界面,和初始成分相比,凝固末期液相中Ti和N的浓度分别提高了7.4和3.2倍。依据析... 详细信息

虽然TiN析出热力学已有较为广泛的研究,但TiN异质形核热力学报道较少。TiN热力学计算表明,TiN不会在熔炼过程中析出,凝固过程中Ti和N元素被逐渐排到固、液界面,和初始成分相比,凝固末期液相中Ti和N的浓度分别提高了7.4和3.2倍。依据析出热力学以及钢中MgO及Al_2O_3的能谱分析可知,钢液冷却时首先析出镁铝尖晶石(MgO·Al_2O_3),TiN以这些氧化物为核心进行异质形核。Ti、Nb稳定的B439M铁素体不锈钢中观察到存在复合型夹杂:TiN以氧化物为核心形核,TiN被外层的NbC包裹住,形成复合型夹杂,试验结果和热力学计算一致。试验结果证明,Ti优先和N结合形成TiN,而Nb倾向和C结合形成NbC。

关键词： B439M铁素体不锈钢 TiN夹杂物凝固析出热力学分析

现代欧盟私法的发展方向:人权保障与社会正义

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中共中央党校学报 2009年第6期13卷 74-77页

作者：付俊伟荷兰蒂尔堡大学法学院荷兰蒂尔堡90153

以"保护公民基本权利"和"社会正义"为主要目标的欧盟民法典草案的出台,突破了传统私法中宪法基本权利与社会正义不对私法领域直接介入的模式,其经验对当下我国民法典的制定颇有借鉴意义。

关键词：欧盟民法典合同法基本权利社会正义

CO_(2) reduction reaction pathways on single‐atom Co sites:Impacts of local coordination environment

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Chinese Journal of Catalysis 2022年第3期43卷 832-838页

作者： Haixia Gao Kang Liu Tao Luo Yu Chen Junhua Hu junwei fu Min Liu College of Science Hunan University of Science and EngineeringYongzhou 425100HunanChina School of Physics and Electronics Central South UniversityChangsha 410083HunanChina School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450002HenanChina

Single‐atom catalysts have been proposed as promising electrocatalysts for CO_(2) reduction reactions(CO_(2)RR).Co‐N_(4) active sites have attracted wide attention owing to their excellent CO selectivity and ***,the effect of the local coordination environment of Co sites on CO_(2) reduction reaction pathways is still *** this study,we investigated the CO_(2) reduction reaction pathways on Co‐N_(4) sites supported on conjugated N_(4)‐macrocyclic ligands with 1,10‐phenanthroline subunits(Co‐N_(4)‐CPY)by density functional theory *** local coordination environment of single‐atom Co sites with N substituted by O(Co‐N_(3)O‐CPY)and C(Co‐N_(3)C‐CPY)was studied for *** calculation results revealed that both C and O coordination break the symmetry of the primary CoN_(4) ligand field and induce charge redistribution of the Co *** Co‐N_(4)‐CPY,CO was confirmed to be the main product of CO_(2)*** is the primary product of Co‐N_(3)O‐CPY because of the greatly increased energy barrier of CO_(2) to**** the energy barrier of CO_(2) to*COOH is reduced on Co‐N_(3)C‐CPY,the desorption process of*CO becomes more ***3OH(or CH_(4))are obtained by further*CO hydrogenation reduction when using Co‐N_(3)C‐*** work provides new insight into the effect of the local coordination environment of single‐atom sites on CO_(2) reduction reaction pathways.

关键词： Coordination environment Product selectivity Single‐atom catalyst CO_(2)reduction reaction DFT calculation

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企业物流成本管理的创新

中国市场 2007年第49期 10-11页

作者：傅俊卫江西理工大学经济管理学院

现代企业,物流成本是除原材料成本之外最大的成本支出项目,企业从第一利润源,到第二利润源,再到第三利润源的不断创新挖掘,使创新成了企业获利的关键所在。本文试从物流成本管理的理念、制度、手段、方法等方面分析企业的创新,以期解决... 详细信息

现代企业,物流成本是除原材料成本之外最大的成本支出项目,企业从第一利润源,到第二利润源,再到第三利润源的不断创新挖掘,使创新成了企业获利的关键所在。本文试从物流成本管理的理念、制度、手段、方法等方面分析企业的创新,以期解决企业利润源的"冰山"问题。

关键词：物流物流成本物流成本管理创新企业经济效益

Electric-field promoted C–C coupling over Cu nanoneedles for CO_(2) electroreduction to C_(2) products

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Chinese Journal of Catalysis 2022年第2期43卷 519-525页

作者： HuangJingWei Li Huimin Zhou Yajiao Zhou Junhua Hu Masahiro Miyauchi junwei fu Min Liu Hunan Provincial Key Laboratory of Chemical Power Sources State Key Laboratory of Powder MetallurgySchool of Physics and ElectronicsCentral South UniversityChangsha 410083HunanChina School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450002HenanChina Department of Materials Science and Engineering School of Materials and Chemical TechnologyTokyo Institute of TechnologyTokyo 152-8552Japan

Cu-based catalysts are the most promising candidates for electrochemical CO_(2)reduction(CO_(2)RR)to multi-carbon(C_(2))*** the C-C coupling process,the rate-determining step for C_(2)product generation,is an important strategy to improve the production and selectivity of the C_(2)*** this study,we determined that the local electric field can promote the C-C coupling reaction and enhance CO_(2)electroreduction to C_(2)***,finite-element simulations indicated that the high curvature of the Cu nanoneedles results in a large local electric field on their *** functional theory(DFT)calculations proved that a large electric field can promote C-C *** by this prediction,we prepared a series of Cu catalysts with different *** Cu nanoneedles(NNs)exhibited the largest number of curvatures,followed by the Cu nanorods(NRs),and Cu nanoparticles(NPs).The Cu NNs contained the highest concentration of adsorbed K+,which resulted in the highest local electric field on the *** adsorption sensor tests indicated that the Cu NNs exhibited the strongest CO adsorption ability,and in-situ Fourier-transform infrared spectroscopy(FTIR)showed the strongest*COCO and*CO signals for the Cu *** experimental results demonstrate that high-curvature nanoneedles can induce a large local electric field,thus promoting C-C *** a result,the Cu NNs show a maximum FEC_(2)of 44%for CO_(2)RR at a low potential(-0.6 V ***),which is approximately 2.2 times that of the Cu *** work provides an effective strategy for enhancing the production of multi-carbon products during CO_(2)RR.

关键词： Electric-field effect C–C coupling Cu nanoneedle C_(2)products CO_(2)electroreduction

采用环境友好的氢氟酸法改造烷基化生产系统研究

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上海环境科学 2020年第1期39卷 17-23,41页

作者：付君伟浙江农业商贸职业学院绍兴312071

以催化裂化装置产出的液化石油气为原料,采用氢氟酸法烷基化工艺提高异辛烷这种高辛烷值、低蒸汽压汽油组分。使用Phillips烷基化反应器可以充分发挥氢氟酸容易汽化的特点,烃相与酸相遍布接触,反应时间短,大幅减少强酸消耗量,烷基化油... 详细信息

以催化裂化装置产出的液化石油气为原料,采用氢氟酸法烷基化工艺提高异辛烷这种高辛烷值、低蒸汽压汽油组分。使用Phillips烷基化反应器可以充分发挥氢氟酸容易汽化的特点,烃相与酸相遍布接触,反应时间短,大幅减少强酸消耗量,烷基化油收率较高。烷基化生产系统中,引入纤维液膜脱硫醇工艺使碱膜与烃膜传质效率提高百倍,几乎脱净所有硫醇,排除了硫醇的影响;采用TiO2-Al2O3催化加氢使丁二烯脱除率和1-丁烯异构化率均优于原始标准,防止酸溶性酯类滋生对油品造成危害;在酸沉降罐里加装界面探测仪和微波测控仪,自动控制适量的酸及时返回烷基化反应器,在线测量烷基化油的酸、水数值,避免烷基化油与催化剂长时间接触而交叉污染,确保产品质量达到环保指标要求;清污分流、分级处理烷基化油生产系统产生的废弃物,增设废酸中和器专门处理酸水共沸物,彻底消除酸水对环境造成的影响。

关键词：氢氟酸法烷基化异丁烷异丁烯汽油废弃物处理环境保护

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范德华力促进水合物生成过程分析

化学世界 2019年第1期60卷 54-59页

作者：付君伟浙江农业商贸职业学院浙江绍兴312071

硫酸铜、硫酸铝钾、高氯酸钴和氯化钡等典型化合物水合物的生成都需要特定条件。通过综合运用热重分析法(TGA)和差示扫描量热法(DSC)两种方法,精确测得它们生成不同种类水合物的临界条件。再从分子结构和化学键角度深入分析范德华力促... 详细信息

硫酸铜、硫酸铝钾、高氯酸钴和氯化钡等典型化合物水合物的生成都需要特定条件。通过综合运用热重分析法(TGA)和差示扫描量热法(DSC)两种方法,精确测得它们生成不同种类水合物的临界条件。再从分子结构和化学键角度深入分析范德华力促进水合物生成的机理,从而得知硫酸铜水合物是阴阳离子共同参与水合配位的结果,硫酸铝钾水合物中一个阳离子参与虚拟配位形成晶格水,其它离子通过反应中间体完成水合反应,高氯酸钴水合物中只有阳离子参与水合配位生成水合离子,氯化钡水合物中阳离子参与虚拟配位并形成晶格水。

关键词：水合物配位氢键范德华力