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Synergistic effect of V and Fe in Ni/Fe/V ternary layered double hydroxides for efficient and durable oxygen evolution reaction

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Frontiers of Chemical Science and Engineering 2023年第1期17卷 102-115页

作者： Lihong Chen Ruxin Deng Shaoshi guo Zihuan Yu Huiqin Yao Zhenglong Wu Keren Shi huifeng Li Shulan Ma Beijing Key Laboratory of Energy Conversion and Storage Materials College of ChemistryBeijing Normal UniversityBeijing 100875China School of Basic Medical Sciences Ningxia Medical UniversityYinchuan 750004China Analytical and Testing Center Beijing Normal UniversityBeijing 100875China State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering Ningxia UniversityYinchuan 750021China

High-performance and stable electrocatalysts are vital for the oxygen evolution reaction(OER).Herein,via a one-pot hydrothermal method,Ni/Fe/V ternary layered double hydroxides(NiFeV-LDH)derived from Ni foam are fabricated to work as highly active and durable electrocatalysts for *** changing the feeding ratio of Fe and V salts,the prepared ternary hydroxides were *** an Fe:V ratio of 0.5:0.5,NiFeV-LDH exhibits outstanding OER activity superior to that of the binary hydroxides,requiring overpotentials of 269 and 274 mV at 50 mA·cm^(−2)in the linear sweep voltammetry and sampled current voltammetry measurements,***,NiFeV-LDH shows extraordinary long-term stability(≥75 h)at an extremely high current density of 200 mA·cm^(−2).In contrast,the binary hydroxides present quick decay at 200 mA·cm^(−2)or even reduced current densities(150 and 100 mA·cm^(−2)).The outstanding OER performance of NiFeV-LDH benefits from the synergistic effect of V and Fe while doping the third metal into bimetallic hydroxide layers:(a)Fe plays a crucial role as the active site;(b)electron-withdrawing V stabilizes the high valence state of Fe,thus accelerating the OER process;(c)V further offers great stabilization for the formed intermediate of FeOOH,thus achieving superior durability.

关键词： oxygen evolution reaction electrocatalysts ternary layered double hydroxides long-term stability

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Surface modification of mesoporous silica nanoparticle with 4-triethoxysilylaniline to enhance seawater desalination properties of thin-film nanocomposite reverse osmosis membranes

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Frontiers of Environmental Science & Engineering 2020年第1期14卷 99-108页

作者： Jian Wang Qun Wang Xueli Gao Xinxia Tian Yangyang Wei Zhen Cao Chungang guo huifeng Zhang Zhun Ma Yushan Zhang The Institute of Seawater Desalination and Multipurpose Utilization Ministry of Natural Resources(Tianjin)Tianjin 300192China College of Chemical and Environmental Engineering Shandong University of Science and TechnologyQingdao 266590China Key Laboratory of Marine Chemistry Theory and Technology(Ministry of Education) Ocean University of ChinaQingdao 266100China

Mesoporous silica nanoparticles(MSN),with higher water permeability than NaA zeolite,were used to fabricate thin-film nanocomposite(TFN)reverse osmosis(RO)***,only aminoalkyl-modified MSN and low-pressure(less than 2.1 MPa)RO membrane were *** this study,aminophenyl-modified MSN(AMSN)were synthesized and used to fabricate high-pressure(5.52 MPa)RO *** the increasing of AMSN dosage,the crosslinking degree of the aromatic polyamide decreased,while the hydrophilicity of the membranes *** membrane morphology was maintained to show a ridge-and-valley structure,with only a slight increase in membrane surface *** the optimum conditions(AMSN dosage of 0.25 g/L),when compared with the pure polyamide RO membrane,the water flux of the TFN RO membrane(55.67 L/m^2/h)was increased by about 21.6%,while NaCl rejection(98.97%)was slightly decreased by only 0.29%.However,the water flux of the membranes was much lower than *** considered that the enhancement of RO membrane permeability is attributed to the reduction of the effective thickness of the PA layer.

关键词： Thin film nanocomposite membrane Reverse osmosis Seawater desalination Aminophenyl-functionalized m esoporous silica nanoparticles

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Controlled preparation and self-assembly of NdVO_4 nanocrystals

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Journal of Rare Earths 2018年第2期36卷 179-183页

作者： Li Tian Yan Li huifeng Wang Shanmin Chen Jinjing Wang Zhen guo Qiang Liu Qi Luo Yingjie Li Fafa Wu School of Materials Science and Engineering Hunan Provincial Key Defense Laboratory of High Temperature Wear-resisting Materials and Preparation Technology Hunan University of Science and Technology State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of Sciences

Phase-pure t-NdVO_4 nanocrystals with different shapes have been synthesized by facile and repeatable hydrothermal methods. The as-synthesized t-NdVO_4 nanoparticles were characterized by various techniques of X-ray diffraction（XRD）. scanning electron microscope（SEM） and transmission electron microscope（TEM）. The growth process and assembly behavior of t-NdVO_4 nanorod arrays were investigated. The results show that the morphology of t-NdV04 nanocrystals is greatly related to the pH value of precursor solution and that strong basic solution is not in favor of the formation of t-NdVO_4 nanoparticles. Due to the strong adhesive action and stabilization of OH^-ions to some crystal faces of NdVO_4, neodymium vanadate crystallite grows into oriented short nanorods and then into nanorod arrays. The shape, crystalline and dimension of NdVO_4 nanocrystals can be effectively governed in our work.

关键词： Inorganic compounds Nanostructures Chemical synthesis X-ray diffraction Rare earths

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思维导图护理模式对早产儿呼吸窘迫综合征的干预效果

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护理实践与研究 2022年第3期19卷 447-451页

作者：席慧芳唐成和何红利郭慧峰孙亚洲曹银利尚云新乡医学院第一附属医院新生儿科河南省卫辉市453100

目的探讨基于思维导图的护理模式对早产儿新生儿呼吸窘迫综合征治疗效果的影响。方法选择2020年3月—2021年3月医院诊断为新生儿呼吸窘迫综合征的120例早产儿作为研究对象,按组间基本特征匹配原则分为观察组与对照组,每组60例。对照组... 详细信息

目的探讨基于思维导图的护理模式对早产儿新生儿呼吸窘迫综合征治疗效果的影响。方法选择2020年3月—2021年3月医院诊断为新生儿呼吸窘迫综合征的120例早产儿作为研究对象,按组间基本特征匹配原则分为观察组与对照组,每组60例。对照组给予常规护理干预,观察组在思维导图指导下进行护理干预。比较两组临床疗效、并发症发生率、Apgar评分、血气分析指标;采用感知护理服务质量的评价(PNSQ量表)评价患儿家属的满意度。结果实施思维导图护理模式后,观察组通气时间、住院时间均短于对照组(P<0.05);观察组治疗后48 h、72 h Apgar评分均高于对照组(P<0.05);观察组治疗后48 h、72 h PaO_(2)及pH逐渐升高,PaCO_(2)逐渐降低,且PaO_(2)及pH均高于对照组(P<0.05),PaCO_(2)低于对照组(P<0.05);观察组并发症发生率低于对照组(P<0.05);观察组对医疗环境、服务态度及操作水平的满意度评分高于对照组(P<0.05)。结论思维导图护理干预可以缩短新生儿呼吸窘迫综合征的病程,改善机体缺氧症状,在提高护理质量同时增加患儿家属的满意度。

关键词：思维导图早产儿新生儿呼吸窘迫综合征疗效

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信息平台管理在重症新生儿中心血管通路维护中的应用价值

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护理实践与研究 2022年第6期19卷 907-910页

作者：席慧芳牛海玲穆丽娜郭慧峰何红利孙亚洲唐成和新乡医学院第一附属医院新生儿科河南省卫辉市453100

目的探讨信息平台管理在重症新生儿中心血管通路维护中的应用价值。方法选择2020年1月—2021年1月82例留置中心血管通路的重症新生儿作为研究对象,按照性别、胎龄、出生体质量、分娩方式匹配的原则分为观察组和对照组,每组41例。对照... 详细信息

目的探讨信息平台管理在重症新生儿中心血管通路维护中的应用价值。方法选择2020年1月—2021年1月82例留置中心血管通路的重症新生儿作为研究对象,按照性别、胎龄、出生体质量、分娩方式匹配的原则分为观察组和对照组,每组41例。对照组给予常规血管通路管理及维护,观察组给予信息平台管理及维护。比较两组患儿血管通路不良事件发生情况及质量合格情况,采用研究后系统适用性问卷(PSSUQ)评价血管通路管理的适用性。结果观察组不良事件发生率低于对照组(P<0.05)。观察组血管通路选择、血管通路维护及护理记录的合格率高于对照组(P<0.05)。干预后观察组有效性、信息质量和操作质量评分均高于对照组(P<0.05)。结论信息平台管理在重症新生儿中心血管通路维护中应用,可以更好地保证各项信息的完整,提高护士的工作效率,同时实现数据共享,开展动态质量监控,不良事件可追溯,为开展持续质量改进和科研项目提供依据。

关键词：信息平台血管通路重症新生儿中心血管通路维护

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三元复合体系界面张力与驱油效率相关性研究

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天然气与石油 2011年第4期29卷 59-61,96页

作者：郭春萍朱慧峰王昊宇司淑荣王颖彭树凯大庆油田勘探开发研究院采收率研究二室黑龙江大庆163712

原有复合体系评价方法存在诸多问题,如评价方法未定量、不准确、不全面等问题。应系统地提出一套评价指标和评价标准,建立评价体系,有效地判别评价方法的可靠性,以便找出提高复合体系驱油效果的主要因素,进而提高石油采收率。针对大庆... 详细信息

原有复合体系评价方法存在诸多问题,如评价方法未定量、不准确、不全面等问题。应系统地提出一套评价指标和评价标准,建立评价体系,有效地判别评价方法的可靠性,以便找出提高复合体系驱油效果的主要因素,进而提高石油采收率。针对大庆油田油层具体情况,研制出相同类型、相同用量、不同分子排布的表面活性剂,实现相同碱、聚合物、表面活性剂用量时,复合体系油水界面张力特征不同。通过岩心物理模拟实验,研究具有不同界面张力特征体系驱油效果,确定界面张力与驱油效率的关系。结合驱油实验结果,得出复合体系界面张力的评价标准,指导复合体系室内配方筛选及注入体系性能优化工作。

关键词：复合体系界面张力驱油效率动态界面张力平衡界面张力

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Non-fullerene acceptor pre-aggregates enable high efficiency pseudo-bulk heterojunction organic solar cells

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Science China Chemistry 2022年第2期65卷 373-381页

作者： Donghui Li Chuanhang guo Xue Zhang Baocai Du Cong Yu Pang Wang Shili Cheng Liang Wang Jinlong Cai Hui Wang Dan Liu huifeng Yao Yanming Sun Jianhui Hou Tao Wang School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular SciencesCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China School of Chemistry Beihang UniversityBeijing 100191China

Pseudo-bulk heterojunction(BHJ)fabricated by sequential casting of donor and acceptor layers has been recently demonstrated as a superior structure to prepare organic solar cells(OSCs)with enhanced efficiency compared to the conventional BHJ OSCs cast from a common solution of donors and ***,molecular diffusion and aggregation within the pseudo-BHJ layer bring great challenges to fully realize the advantage of pseudo-BHJ ***,a solution-incubated pre-aggregation strategy is employed to tune the nanoscale aggregates of non-fullerene acceptor(NFA)BTP-e C11 and N3 to substantially enhance device power-conversion efficiency(PCE).NFA pre-aggregates are incubated in solutions via aging or adding antisolvent,and then sequentially cast onto D18 fibrillar network,which then penetrate to form a pseudo-BHJ structure with appropriate domain sizes to ensure superior charge *** the conventional pseudo-BHJ OSCs obtain inferior PCEs below 17%compared with normal BHJ OSCs,NFA pre-aggregates help to achieve remarkable PCEs of 17.7%and 17.5%for D18/BTP-e C11 and D18/N3 pseudo-BHJ *** work demonstrates that the solution-incubated nanoscale pre-aggregation is an efficient approach to regulate molecular diffusion and aggregation to guarantee high performance pseudo-BHJ OSCs.

关键词： non-fullerene acceptors pre-aggregate pseudo-bulk heterojunction organic solar cells

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Heating-induced aggregation control for efficient sequential-cast organic solar cells

Aggregate

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Aggregate 2022年第3期3卷 19-26页

作者： Donghui Li Chuanhang guo Xue Zhang Baocai Du Pang Wang Shili Cheng Jinlong Cai Hui Wang Dan Liu huifeng Yao Jianhui Hou Tao Wang School of Materials Science and Engineering Wuhan University of TechnologyWuhanChina State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular SciencesCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijingChina University of Chinese Academy of Sciences BeijingChina

The aggregation and morphology within the photoactive layer is of considerable significance to boost the power-conversion efficiency(PCE)of organic solar cells(OSCs).Herein,heating-induced aggregation control of nonfullerene acceptor BTPeC7 during sequential casting was *** large aggregates of BTP-eC7 can be significantly reduced by sequential casting of BTP-eC7 hot solution on the D18 fibrillar layer,and further eliminated by sequential casting of BTP-eC7 hot solution on the D18 fibrillar layer heated on hot substrate,leading to stronger faceonπ–πstacking and appropriate phase separation within the photoactive layer to promote exciton dissociation and charge *** maximum PCE of D18/BTPeC7 solar cells can be enhanced from 8.1%of room temperature casting to 15.9%of hot solution,hot-substrate casting,therefore demonstrates that heating-induced aggregation and sequential-casting strategies are a promising approach in improving the performance of OSCs employing nonfullerene acceptors with limited solubility or strong crystallization ability.

关键词： aggregation heating nonfullerene acceptors organic solar cells sequentialcast

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Nd:GYSGG/YVO_4双波长人眼安全波段内腔拉曼激光器

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红外与激光工程 2015年第12期44卷 3512-3516页

作者：王慧张会峰郭涛空军航空大学航空理论系吉林长春130022

以Nd:GYSGG晶体为激光增益介质,a切割YVO4晶体为拉曼增益介质,利用Nd:GYSGG晶体的双波长激光运转特性实现声光调Q 1.5μm人眼安全波段双波长内腔拉曼激光器。为克服Nd:GYSGG晶体严重的热透镜效应对激光器功率的限制,实验确定其同带泵浦... 详细信息

以Nd:GYSGG晶体为激光增益介质,a切割YVO4晶体为拉曼增益介质,利用Nd:GYSGG晶体的双波长激光运转特性实现声光调Q 1.5μm人眼安全波段双波长内腔拉曼激光器。为克服Nd:GYSGG晶体严重的热透镜效应对激光器功率的限制,实验确定其同带泵浦吸收峰位置及吸收系数,采用同带泵浦方式减轻热效应。吸收882.9 nm泵浦光功率17.1 W时,在20 k Hz的脉冲重复频率下获得1.44 W的1.5μm双波长输出,转换效率8.4%,光束质量因子M2=2.4;棱镜分光测得其中1 497 nm和1 516 nm功率分别为0.55 W和0.89 W,二者脉冲宽度相近,均为15.3 ns左右。与808 nm传统泵浦相比,同带泵浦方式下激光器的输出功率及光束质量均得到明显提升。

关键词：双波长激光器拉曼激光器人眼安全波段

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Impact of satellite blood culture on early diagnosis of sepsis

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Journal of Intensive Medicine 2022年第1期2卷 56-60页

作者： Ziqi guo Bo guo Shanmei Wang huifeng Zhang Wenxiao Zhang Bingyu Qin Huanzhang Shao Department of Critical Care Medicine Henan University People’s HospitalZhengzhouHenan 455000China Department of Critical Care Medicine Henan Provincial People’s HospitalZhengzhouHenan 455000China Henan Key Laboratory for Critical Care Medicine Henan Provincial People’s HospitalZhengzhouHenan 455000China Department of Critical Care Medicine Zhengzhou University People’s HospitalZhengzhouHenan 455000China Department of Microbiology Laboratory Henan Provincial People’s HospitalZhengzhouHenan 455000China

Background:The aim of this study was to assess whether satellite blood culture(SBC)can improve turnaround times,antibiotic switching,and patient prognosis,relative to laboratory blood culture(LBC).Methods:Patients with sepsis treated in the intensive care units(ICUs)of Henan Provincial People’s Hospital from February 5,2018 to January 19,2019 who met the inclusion criteria were recruited to the study and divided into the SBC group and LBC group according to different blood culture *** demographics,blood culture,antibiotic adjustment,and prognosis data were collected and compared between the two ***:A total of 204 blood culture sets from 52 ICU patients,including 100 from the medical microbiology LBC group and 104 from the SBC group,were analyzed in this *** was no significant difference in the positive rates between the two *** from specimen collection to incubation was significantly shorter in the SBC group than that in the LBC group(1.65 h vs.3.51 h,z=−4.09,P<0.001).The median time from specimen collection to notification of blood culture positivity was 24.83 h in the SBC group and 27.83 h in the LBC *** times from adjustment of antibiotics according to the first report were 26.05 h and 51.71 h in the SBC and LBC groups,respectively,while those according to the final report were 97.17 h and 111.45 h,*** ICU lengths of stay were 15.00 days and 17.00 days in the SBC and LBC groups,respectively,and median ICU lengths of stay were 18.00 days and 23.50 days,*** hospitalization costs were 157.99 and 186.73 thousand yuan in the SBC and LBC groups,***:SBC can significantly reduce blood culture turnaround times;however,there were no significant differences between the two blood culture methods in initial reporting of positive cultures,time to adjustment of antibiotic therapy,or medical costs,despite a trend toward improvement.

关键词： Blood culture Sepsis Intensive care unit Antibiotic switching Turnaround time Gram stain

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