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Nano-Micro Letters 2019年第1期11卷 5-32页

作者： wenwen zhan Liming Sun Xiguang Han Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials Department of ChemistrySchool of Chemistry and Chemical Engineering Jiangsu Normal University

Porous structures o er highly accessible surfaces and rich pores, which facilitate the exposure of numerous active sites for photocatalytic reactions, leading to excellent performances. Recently, metal–organic frameworks(MOFs) have been considered ideal precursors for well-designed semiconductors with porous structures and/or heterostructures, which have shown enhanced photocatalytic activities. In this review, we summarize the recent development of porous structures, such as metal oxides and metal sulfides, and their heterostructures, derived from MOF-based materials as catalysts for various light-driven energy-/environment-related reactions, including water splitting, CO_2 reduction, organic redox reaction, and pollution degradation. A summary and outlook section is also included.

关键词： Metal–organic frameworks Derivatives Porous structure Photocatalysis

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Fabricating a hollow cuboctahedral structure for N-doped carbon coated p-n heterojunctions towards high-performance photocatalytic organic transformation

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Nano Research 2022年第5期15卷 4638-4645页

作者： Hao Gao Liming Sun Mengge Li wenwen zhan Xiaojun Wang Xiguang Han Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials School of Chemistry and Chemical EngineeringJiangsu Normal UniversityXuzhou 221116China

The application of semiconductors-based photocatalysts in organic transformation has been limited by the low light utilization efficiency and the rapid recombination of photo-induced charge *** this paper,we have successfully fabricated a hollow cuboctahedral nanostructure(CNNCH),which is composed of N-doped carbon layer and CuO/NiO p-n *** hollow structure in CNNCH can effectively favor the light utilization through the multiple light reflection and *** separation of photo-induced charge carriers can be highly improved by the exitence of charge transfer pathways between the p-n heterojunctions and semiconductor/N-doped carbon layer *** to the above advantages,hollow cuboctahedral CNNCH as the photocatalyst has behaved high performance towards the photocatalytic cross-dehydrogenative coupling reaction.

关键词： organic transformation p-n heterojunction N-doped carbon semiconductor hollow structure

CFD Investigation of Diffusion Law and Harmful Boundary of Buried Natural Gas Pipeline in the Mountainous Environment

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Energy Engineering 2024年第8期121卷 2143-2165页

作者： Liqiong Chen Kui Zhao Kai zhang Duo Xv Hongxvan Hu Guoguang Ma wenwen zhan School of Petroleum Engineering Southwest Petroleum UniversityChengdu610000China National Pipe Network Group Southwest Pipeline Co. Ltd.Chengdu610000China National Pipeline Research Center Conveyance Pipe Institute Baoji Petroleum Steel Pipe Co.Ltd.Baoji721000China

The leakage gas from a buried natural gas pipelines has the great potential to cause economic losses and environmental pollution owing to the complexity of the mountainous *** this study,computational fluid dynamics(CFD)method was applied to investigate the diffusion law and hazard range of buried natural gas pipeline leakage in mountainous *** on cloud chart,concentration at the monitoring site and hazard range of lower explosion limit(LEL)and upper explosion limit(UEL),the influences of leakage hole direction and shape,soil property,burial depth,obstacle type on the diffusion law and hazard range are *** show that the leakage gas is not radially diffused until it reaches the ground,and the velocity of gas diffusion to the ground and the hazard range decrease as the angle between the leaking direction and the buoyancy direction *** and square leak holes have a faster diffusion rate and a wider hazard range than *** diffusion rate of leakage gas in soil rises as soil granularity and porosity *** time of leakage gas diffusion to the ground increases significantly with the increase of burial depth,and the hazard range reduces as burial depth ***-type obstacles will alter the diffusion path of the leakage gas and accelerate the expansion of the hazard distance,while trench-type obstacles will cause the natural gas to accumulate in the trench and form a high concentration region slowing the expansion of the surface gas concentration.

关键词： Mountainous environment buried pipeline leakage and diffusion hazard range numerical simulation

Engineering Cu_(2)O/Cu/N-C interface to induce directional migration of charge for driving photocatalytic homo-coupling of terminal alkynes

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Nano Research 2024年第8期17卷 6895-6902页

作者： Xiaoqin Yan Tianyi Xu wenwen zhan Yang Yang Yang Yu Jianjian Yi Xiaoxiao He Lei Yang Jianwei Zhao Liming Sun Xiguang Han Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials Department of ChemistrySchool of Chemistry&Materials ScienceJiangsu Normal UniversityXuzhou 221116China State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200241China College of Environmental Science and Engineering Yangzhou UniversityYangzhou 225009China Shenzhen HUASUAN Technology Co. LtdShenzhen 518055China

The efficient utilization of visible light catalysts for organic reactions necessitates not only the effective separation of photogenerated electrons and holes to participate in the reaction,but also their ability to form key intermediates with reactant *** present study successfully synthesized a crusiform-like mesoporous structure of nitrogen-doped carbon-coated Cu_(2)O/Cu(Cu_(2)O/Cu/N-C)with a Cu_(2)O/dual electron acceptor interface using etched HKUST-1 as the precursor.A series of theoretical and experimental studies have demonstrated that the Cu_(2)O/Cu/N-C interface in the photocatalytic homo-coupling of terminal alkynes not only effectively enhances the separation of photogenerated electron−hole pairs,but also facilitates the formation of the key intermediate[Cu_(2)O/Cu/N-C]-phenylacetylide and promotes the rearrangement of its internal *** a result,the homo-coupling reaction can be effectively *** primary reason for the functional role of Cu_(2)O/Cu/N-C interface lies in the downward bending of energy band from Cu_(2)O to N-doped C layers,induced by the different work functions of Cu_(2)O,Cu and N-doped C ***,Cu_(2)O/Cu/N-C photocatalysts demonstrate exceptional photocatalytic activity in the homo-coupling reaction of terminal alkynes under blue-light irradiation and air *** present study presents a novel research methodology for the development of highly efficient visible light catalysts to facilitate organic reactions in future applications.

关键词： photocatalysis homo-coupling of terminal alkynes directional migration of charges heterojunction interface Cu_(2)O carbon coated

Synthesis of Metal-Organic Frameworks Derived Composite Nanomaterials and their Properties

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功能材料信息 2016年第2期13卷 55-56页

作者： Qin Kuang Yinyun Lv wenwen zhan Yiting Wang Luning Chen Qi Zhou Department of Chemistry College of Chemistry and Chemical EngineeringXiamen University

Metal-organic frameworks(MOFs)are a new class of crystalline porous materials with periodic network structures,which are formed by self-assembly between metal ions and bridging organic *** to high surface areas,large pore volumes,and tunable surface properties,MOFs present promising application in gas storage and separation,drug delivery,heterogeneous catalysis,***,MOFs are found to

关键词：英语阅读理解纳米材料与技术

复杂地质条件下基坑支护结构设计及数值模拟研究

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江西建材 2024年第3期 173-174,184页

作者：詹文文六盘水市民生产业投资集团有限责任公司贵州六盘水553000

文中以江苏南京某基坑工程项目为例,结合项目中“坑中有坑”和“倾斜坑”等非常规形状,根据地质条件和基坑形态,将基坑土层划分为西北区和东南区,并提出相应的支护方案,通过数值模拟,验证该方案的可行性。

关键词：基坑支护搅拌桩地下连续墙受限含水层

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智能建筑设备电气自动化系统设计

智能城市应用 2019年第4期2卷 114-116页

作者：战雯雯山东省济南市长清区孝里镇山东济南250300

电气自动化系统作为智能建筑中的重要构成,可实现智能建筑设备的全天候无人监管,辅助电气系统管理人员开展检修、维护工作,确保建筑设备运行高效及安全。文章对智能建筑设备电气自动化系统设计进行研究,分析电子自动化系统的设计原则和... 详细信息

电气自动化系统作为智能建筑中的重要构成,可实现智能建筑设备的全天候无人监管,辅助电气系统管理人员开展检修、维护工作,确保建筑设备运行高效及安全。文章对智能建筑设备电气自动化系统设计进行研究,分析电子自动化系统的设计原则和设计要点。通过前期工作优化,实现智能建筑设备电子自动化系统更佳的性能和功能,提升智能建筑整体运行水平。

关键词：智能建筑电气自动化系统系统设计

番茄WRKY转录因子SlWRKY75的克隆、表达及功能分析

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华北农学报 2023年第6期38卷 1-10页

作者：陈娜詹文文刘兴雨石磊鑫李若楠谢镕却志群宜春学院生命科学与资源环境学院江西宜春336000 广州雨蔬农业科技有限公司广东广州510000

WRKY转录因子是植物中特有的转录因子家族之一,研究证实WRKY转录因子在植物的生长发育及对生物与非生物胁迫响应中具有重要的调控作用。为揭示番茄WRKY基因的功能,基于前期转录组数据,以番茄高抗青枯病Hm 2-2(R)与高感青枯病BY 1-2(S)2... 详细信息

WRKY转录因子是植物中特有的转录因子家族之一,研究证实WRKY转录因子在植物的生长发育及对生物与非生物胁迫响应中具有重要的调控作用。为揭示番茄WRKY基因的功能,基于前期转录组数据,以番茄高抗青枯病Hm 2-2(R)与高感青枯病BY 1-2(S)2个自交系株系为试验材料,克隆得到1个番茄WRKY转录因子SlWRKY75基因(Solyc05g015850.3)。通过生物信息学分析、氨基酸序列多重比对、系统发育树构建、实时荧光定量PCR(qRT-PCR)和病毒诱导的基因沉默(VIGS)等技术方法对其基因及编码蛋白的结构、表达模式与功能进行分析。结果表明,该基因的cDNA全长为653 bp,其最大开放阅读框为519 bp,编码172个氨基酸,其蛋白相对分子量为19.87851 ku,理论等电点为9.32,属于亲水性非分泌蛋白,且不存在跨膜结构,同时,该蛋白具有1个高度保守的WRKY结构域和一个CX_(4)CX_(23)HXH锌指基序,且同属于第Ⅱ类家族。系统发育树分析表明,SlWRKY75与潘那利番茄SpWRKY75亲缘关系最近,并与其他茄科聚为1组,而与橡胶树HbWRKY75、陆地棉GhWRKY75等的亲缘关系较远,在系统发育树上处于不同的分支。qRT-PCR结果表明,SlWRKY75基因的表达具有组织特异性,并可被青枯菌、水杨酸和茉莉酸所诱导。利用VIGS技术得出,沉默SlWRKY75降低了植株对青枯病的抗性,表明SlWRKY75正调控番茄对青枯病的抗性。通过以上研究结果得出,SlWRKY75基因在番茄调控青枯病抗性响应过程中扮演着重要的角色。

关键词：番茄青枯病 WRKY转录因子基因克隆表达分析病毒诱导的基因沉默(VIGS)

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前列地尔对模型大鼠深静脉血栓的改善作用

中国药业 2022年第6期31卷 42-46页

作者：刘园园詹雯雯缪林益刘军新疆医科大学第七附属医院药学部新疆乌鲁木齐830028

目的探讨前列地尔对模型大鼠深静脉血栓的改善作用。方法将60只SD大鼠随机分为假手术组(等体积生理盐水灌胃)、模型组(等体积生理盐水灌胃)、低分子肝素钠组(360 IU/kg皮下注射)及前列地尔低、中、高剂量组(2.5,5.0,10.0μg/kg腹腔注射)... 详细信息

目的探讨前列地尔对模型大鼠深静脉血栓的改善作用。方法将60只SD大鼠随机分为假手术组(等体积生理盐水灌胃)、模型组(等体积生理盐水灌胃)、低分子肝素钠组(360 IU/kg皮下注射)及前列地尔低、中、高剂量组(2.5,5.0,10.0μg/kg腹腔注射),各10只。采用结扎下腔静脉法复制深静脉血栓大鼠模型,假手术组仅开腹腔。建模成功后,各组大鼠给予相应药物或生理盐水,每日1次,连续14 d。测定大鼠静脉血活化部分凝血活酶时间(APTT)、凝血酶原时间(PT)、凝血酶时间(TT)、D-二聚体(D-D)水平;采用酶联免疫吸附(ELISA)法测定血浆血栓素B_(2)(TXB_(2))、组织纤溶酶原激活物(t-PA)、纤溶酶原激活物抑制物-1(PAI-1)水平;采用苏木素-伊红(HE)染色,显微镜下观察血管组织病理形态学;采用实时定量聚合酶链反应(RT-qPCR)法及Westernblot法测定血管组织血栓调节蛋白(TM)、血管细胞黏附分子-1(VCAM-1)、组织因子(TF)mRNA及蛋白的表达水平。结果与模型组比较,各用药组大鼠的APTT,PT,TT均显著延长(P<0.05),t-PA水平及TM的mRNA和蛋白表达水平均显著升高(P<0.05),D-D,TXB_(2),PAI-1水平及VCAM-1和TF的mRNA和蛋白表达水平均显著降低(P<0.05)。模型组大鼠静脉血管血栓可见形成及血管内皮炎性浸润;各用药组大鼠与之比较,静脉血管血栓形成减少,血管内皮炎性浸润程度减轻。结论前列地尔能抑制模型大鼠深静脉血栓的形成,其机制可能与改善凝血功能和修复深静脉血管内皮损伤有关。

关键词：深静脉血栓前列地尔大鼠凝血功能血管内皮保护作用机制病理形态学

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超临界CO_(2)输送用L450M钢级HFW焊管开发

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油气储运 2024年第5期43卷 552-560页

作者：黄晓辉毕宗岳赵西岐张锦刚韦奉王博玉詹文文中油国家石油天然气管材工程技术研究中心有限公司宝鸡石油钢管有限责任公司

[目的]随着“双碳”目标的推进,超临界CO_(2)输送管道用钢朝着更高钢级方向发展。[方法]采用低C、中Mn、微Ni合金化设计、高洁净化炼钢及大吨位压下轧制技术,开发出微观组织以细小扁平的多边形铁素体+铁素体+少量珠光体为主的L450M钢级(... 详细信息

[目的]随着“双碳”目标的推进,超临界CO_(2)输送管道用钢朝着更高钢级方向发展。[方法]采用低C、中Mn、微Ni合金化设计、高洁净化炼钢及大吨位压下轧制技术,开发出微观组织以细小扁平的多边形铁素体+铁素体+少量珠光体为主的L450M钢级(X65钢级)超临界CO_(2)输送管用热轧卷板。针对设计压力16 MPa的超临界输送用OD219.1 mm×10 mm(管径×壁厚)高频焊接(High Frequency Welding, HFW)焊管,为保证该HFW焊管运行时具有抗起裂与抗断裂扩展能力,经过计算,要求-45℃下母材夏比冲击吸收能量单值不小于88 J、均值不小于117 J,-45℃下焊缝、热影响区夏比冲击吸收能量单值不小于42 J、均值不小于56 J。[结果]经成型、焊接及热处理工艺研究,在成型挤压量5.25 mm,焊接速度17 m/min,焊缝热处理温度930℃工艺下,开发出低温性能优异的L450M钢级超临界CO_(2)输送用HFW焊管。经第三方检测,该焊管性能完全符合API Spec 5L《管线钢管》(46版)标准与低温韧性要求,经压扁试验压至贴合,母材与焊缝均未出现任何裂纹,表明母材与焊缝具有很强的塑性,焊缝质量优异。母材屈服强度534 MPa,母材、焊缝的抗拉强度基本一致,分别为619 MPa、620 MPa,均达到不低于535 MPa的标准要求,强度裕量大。母材、焊缝及热影响区的硬度均不高于220 HV10且分布均匀。-45℃下焊缝冲击吸收能量为177~401 J、热影响区冲击吸收能量为200~415 J、母材冲击吸收能量为248~416 J,且母材、焊缝、热影响区的韧脆转变温度均低于-60℃。[结论]该HFW焊管低温韧性优异,抗低温延性止裂能力高,且承受最大内压与外压能力分别达到62.29 MPa、38.9 MPa,完全满足超临界CO_(2)输送用HFW焊管的运行需求。

关键词：超临界CO_(2) L450钢 X65钢焊管韧脆转变温度

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