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Studies　on　sedimentary　events　in　Mariana　Trough　and　characteristics　of　geomagnetic　field　change

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Acta Oceanologica Sinica 1996年第4期15卷 457-468页

作者： Cong Youzi han Guozhong Cheng Guoliang Sun yuhang Wei Qingyun and Jiang Li First Institute of Oceanography State Oceanic Administration Qingdao 266003 China Institute of Geology State Seismological Bureau Beijing 100029 China Institute of Geophysics Academia Sinica Beijing 100101 China

The analysis on the magnetic fabric of profile of the sedimentary core taken in five stations in the small spreading ridge area in Mariana Trough shows that the effect of indicating its depositional fabric, sedimentary *** events, sedimentary interfaces and sediment composition as well as sedimentary dynamic environment by magnetic. Parameters is clearer than that by traditional method of analysis. The indication of sedimentary events can show its high resolution. The study on the Late Quaternary sedimentary events in this area shows that this area underwent four big events of sudden change in the Holocene epoch based on the sudden change of underflow direction and the position relationship between ash beds and erosion sediment layers. The sudden change of underflow direction is a believable evidence for judgement and study of sudden event within this area. The direction changes of its geomagnetic field show three morphotypes i. e. relatively stable type and non-stable type of oscillatory amplitude of magnetic inclination (Inc) which existed during the relatively stable period of amplitude of magnetic declination (Dnc). Anothertype is characterized by big amplitude of both inclination and *** space-time series of the three type mentioned above is a new way for forming a high-resolution stratigraphical timetable.

关键词： alimentary magnetic fabric underflow direction sedimentary events geomagnetic field direction

Catalytic effects of V-and O-species derived from PrF_(3)/V_(2)C for efficient hydrogen storage in MgH_(2)

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Nano Research 2024年第8期17卷 7117-7125页

作者： Zhenluo Yuan yuhang Wang Xiuxiu Zhang Shuyan Guan Xiaojiao Wang Liqiang Ji Qiuming Peng Shumin han Yanping Fan Baozhong Liu College of Chemistry and Chemical Engineering Henan Polytechnic UniversityJiaozuo 454000China Henan Famous Diamond Co. Ltd.Mengzhou 454763China School of Chemical Engineering Zhengzhou UniversityZhengzhou 450001China Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China

Magnesium hydride(MgH_(2))is considered as an ideal hydrogen storage material with excellent hydrogen capacity,but the slow kinetics impedes its ***,an efficient additive of V2C MXene-anchored PrF_(3) nanoparticles(PrF_(3)/V_(2)C)was synthesized,which presents excellent catalytic effect in improving the reversibility and stability of hydrogen storage in MgH_(2).The initial dehydrogenation temperature of the 5 wt.% PrF_(3)/V_(2)C-containing MgH_(2)(182℃) is 105℃ lower than that of pure MgH_(2),and 6.5 wt.%hydrogen is rapidly released from 5 wt.%PrF_(3)/V_(2)C-added MgH_(2)sample in 6 min at 240℃.In addition,5 wt.%PrF_(3)/V_(2)C-containing MgH_(2) sample possesses outstanding reversible hydrogen storage capability of 6.5 wt.% after 10 cycles of dehydrogenation and *** analysis shows that the introduction of Pr improves the stability of V-species(V^(0)and V^(2+))and O-species(lattice oxygen(OL)and vacancy oxygen(OV))formed during ball milling,promotes the interaction between V-species and O-species,and enhances their reversibility,which contributes to the significant improvement in re/dehydrogenation reversibility and cycling stability of MgH_(2).This study provides effective ideas and strategies for the purpose of designing and fabricating high-efficient catalysts for solid-state hydrogen storage materials.

关键词： hydrogen storage materials MgH_(2) dehydrogenation reversibility cyclic stability

High-definition colorful perovskite narrowband photodetector array enabled by laser-direct-writing

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Nano Research 2022年第6期15卷 5476-5482页

作者： Xiaobao Xu yuhang Dong Yuanzhou Zhang Zeyao han Jiaxin Liu Dejian Yu Yi Wei Yousheng Zou Bo Huang Jun Chen Haibo Zeng Key Laboratory of Advanced Display Materials and Devices Ministry of Industry and Information TechnologyInstitute of Optoelectronics&NanomaterialsCollege of Material Science and EngineeringNanjing University of Science and TechnologyNanjing 210094China

Narrowband photodetectors as specific spectral sensing pixels have drawn intense attention in multispectral detection due to their distinct characteristic of filter-free spectrum discrimination,in which the emerging halide lead perovskites witness a booming development in their performance and wavelength-selectivity from blue to near-infrared ***,the challenge in integrating perovskite narrowband photodetectors on one chip imposes an impediment on practical *** this work,the combination of laser-direct-writing and ion exchange is proposed as an efficient way to fabricate high-definition colorful sensing array with perovskite narrowband photodetector unit as *** laser irradiation,the photolysis of halocarbon solvent(CHCl_(3),CH_(3)CH_(2)I,etc)releases the halide ions,which brings the ion exchange and gives rise to slow-varying bandgap in single perovskite photoactive *** ion exchange can be controlled via laser irradiation time and focus point,thus enabling precisely engineerable *** optimizing the process,it is successfully applied to develop patterned perovskite narrow blue and green photodetectors array with a high-definition of~53 *** believe this result will make a great step forward to integrate multifunctional perovskite devices on one chip,which will pave the way for perovskite optoelectronic device to the commercial application.

关键词： photodetector narrowband imaging array laser-direct-writing perovskite

Bi_2WO_6-SrTiO_3异质结的制备及可见光催化性能研究

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广东化工 2017年第9期44卷 39-41页

作者：郭琪瑶许辉郑宣清吴林鑫韩雨航李嘉欣魏月琳黄昀昉华侨大学化工学院福建厦门361021 华侨大学材料科学与工程学院福建厦门361021

采用两步水热法制备出不同比例Bi_2WO_6-SrTiO_3异质结,对其进行XRD、SEM、BET、紫外可见漫反射(DRS)等表征测试。并在室温下以氙灯为光源,对不同比例Bi_2WO_6-SrTiO_3异质结进行吸附与光降解测试。结果表明20 mg/L甲基橙2 h内降解率最... 详细信息

采用两步水热法制备出不同比例Bi_2WO_6-SrTiO_3异质结,对其进行XRD、SEM、BET、紫外可见漫反射(DRS)等表征测试。并在室温下以氙灯为光源,对不同比例Bi_2WO_6-SrTiO_3异质结进行吸附与光降解测试。结果表明20 mg/L甲基橙2 h内降解率最高可达95%,且对甲基蓝、刚果红均有降解效果。Bi_2WO_6与SrTiO_3形成了异质结结构有效的抑制了光生载流子与空穴的复合,增强了界面电荷传输效率,使光催化效率得到了提高。

关键词： Bi2WO6 SrTiO3 异质结水热法光催化

Laval喷管中CO_(2)凝结特性数值模拟研究

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电力科技与环保 2023年第6期39卷 465-470,504页

作者：杨玉吴家荣韩煜航吴帅帅蒋世希李凯伦张一帆李红智西安热工研究院有限公司陕西西安710054

超临界二氧化碳压缩机是超临界二氧化碳循环的关键核心设备之一,压缩机入口参数接近临界点,叶轮附近的局部加速现象会引发两相区的出现,这可能会对压缩机的安全稳定运行带来隐患。为了深入认识并找出解决该问题的方法,本文将液滴凝结经... 详细信息

超临界二氧化碳压缩机是超临界二氧化碳循环的关键核心设备之一,压缩机入口参数接近临界点,叶轮附近的局部加速现象会引发两相区的出现,这可能会对压缩机的安全稳定运行带来隐患。为了深入认识并找出解决该问题的方法,本文将液滴凝结经典成核和生长模型以离散颗粒模型(discrete particle mode,DPM)的形式嵌入流体计算模型,开发出描述超临界二氧化碳凝结的CFD-DPM数值模拟方法,并验证其可靠性。数值模拟结果表明,该方法模拟出的结果与实验数据相符较好。Laval喷管的渐缩部分工质压力急剧降低,达到了很高的过饱和度状态,穿过亚稳态区进入凝结区域,创造极为有利于凝结的环境,因此二氧化碳工质在这个位置集中凝结,即成核率最大的位置出现在x=-0.012 m位置处,最大值约为2.58×10^(25)个/(m^(3)·s)。在二氧化碳凝结的同时,释放出来的热量使工质状态向亚稳态区域偏移,液滴凝结的驱动力减弱,液滴的成核速率和生长速率减缓。本文提出的CFD-DPM方法具有详细描述凝结液滴演化规律的功能,可应用在超临界二氧化碳压缩机的模拟中,有望展示压缩机叶轮进口的凝结液滴的发展演化规律,为高性能超临界二氧化碳压缩机的设计和优化提供高效手段。

关键词：二氧化碳凝结 Laval喷管数值模拟离散颗粒模型

Overcoming coke formation in high-temperature CO_(2)electrolysis

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Chinese Journal of Catalysis 2022年第12期43卷 2938-2945页

作者： Tongbao Wang Guangtai han Ziyun Wang yuhang Wang Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123JiangsuChina School of Chemical Sciences University of AucklandAuckland 1010New Zealand

High-temperature CO_(2)reduction reaction(HT-CO_(2)RR)in solid oxide electrochemical cells(SOECs)features near-unity selectivity,high energy efficiency,and industrial relevant current density for the production of CO,a widely-utilized“building block”in today’s chemical ***,it offers an intriguing and promising means to radically change the way of chemical manufacturing and achieve carbon neutrality using renewable energy sources,CO_(2),and *** with the great potential of HT-CO_(2)RR,this carbon utilization approach,unfortunately,has been suffering coke formation that is seriously detrimental to its energy efficiency and operating *** recent years,much effort has been added to understanding the mechanism of coke formation,managing reaction conditions to mitigate coke formation,and devising coke-formation-free electrode *** investigations have substantially advanced the HT-CO_(2)RR toward a practical industrial technology,but the resulting coke formation prevention strategies compromise activity and energy *** research may target exploiting the control over both catalyst design and system design to gain selectivity,energy efficiency,and stability ***,this perspective overviews the progress of research on coke formation in HT-CO_(2)RR,and elaborates on possible future directions that may accelerate its practical implementation at a large scale.

关键词： High-temperature CO_(2)electroreduction Solid oxide electrochemical cell Coke formation Boudouard reaction Stability

Unraveling Passivation Mechanism of Imidazolium-Based Ionic Liquids on Inorganic Perovskite to Achieve Near-Record-Efficiency CsPbI_(2)Br Solar Cells

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Nano-Micro Letters 2022年第1期14卷 152-166页

作者： Jie Xu Jian Cui Shaomin Yang Yu han Xi Guo yuhang Che Dongfang Xu Chenyang Duan Wenjing Zhao Kunpeng Guo Wanli Ma Baomin Xu Jianxi Yao Zhike Liu Shengzhong Liu Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationShaanxi Key Laboratory for Advanced Energy Devices/Shaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710119People’s Republic of China Dalian Institute of Chemical Physics iChEMUniversity of Chinese Academy of SciencesDalian National Laboratory for Clean EnergyChinese Academy of SciencesDalian 116023People’s Republic of China Ministry of Education Key Laboratory of Interface Science and Engineering in Advanced Materials Research Center of Advanced Materials Science and TechnologyTaiyuan University of TechnologyTaiyuan 030024People’s Republic of China Institute of Functional Nano&Soft Materials Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesJoint International Research Laboratory of Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123People’s Republic of China Department of Materials Science and Engineering and Shenzhen Engineering Research and Development Center for Flexible Solar Cells Southern University of Science and TechnologyShenzhen 518055People’s Republic of China State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources North China Electric Power UniversityBeijing 102206People’s Republic of China

The application of ionic liquids in perovskite has attracted wide-spread attention for its astounding performance improvement of perovskite solar cells(PSCs).However,the detailed mechanisms behind the improvement remain ***,a series of imidazolium-based ionic liquids(IILs)with different cations and anions is systematically investigated to elucidate the passivation mechanism of IILs on inorganic *** is found that IILs display the following advantages:(1)They form ionic bonds with Cs^(+)and Pb^(2+)cations on the surface and at the grain boundaries of perovskite films,which could effectively heal/reduce the Cs^(+)/I−vacancies and Pb-related defects;(2)They serve as a bridge between the perovskite and the hole-transport-layer for effective charge extraction and transfer;and(3)They increase the hydrophobicity of the perovskite surface to further improve the stability of the CsPbI_(2)Br *** combination of the above effects results in suppressed non-radiative recombination loss in CsPbI_(2)Br PSCs and an impressive power conversion efficiency of 17.02%.Additionally,the CsPbI_(2)Br PSCs with IILs surface modification exhibited improved ambient and light illumination *** results provide guidance for an indepth understanding of the passivation mechanism of IILs in inorganic perovskites.

关键词： Ionic liquids Inorganic perovskite Imidazolium Passivation High efficiency

Advances in inorganic nanoparticles trapping stiffness measurement:A promising tool for energy and environmental study

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Energy Reviews 2023年第2期2卷 13-31页

作者： Xiaolin Chen Jiajie Chen Jianxing Zhou Xiaoqi Dai yuhang Peng Yili Zhong Ho-Pui Ho Bruce Zhi Gao han Zhang Junle Qu Yonghong Shao State Key Laboratory of Radio Frequency Heterogeneous Integration Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronics EngineeringShenzhen UniversityShenzhen518060China Department of Biomedical Engineering The Chinese University of Hong KongShatinHong Kong Department of Bioengineering and COMSET Clemson UniversityClemsonSC29634USA

Optical tweezers system has emerged as an efficient tool to manipulate tiny particles in a non-invasive *** stiffness,as an essential parameter of an optical potential well,represents the trapping ***,trapping inorganic nanoparticles such as metallic nanoparticles or other functionalized inorganic nanoparticles is important due to their properties of good stability,high conductivity,tolerable toxicity,etc.,which makes it an ideal detection strategy for bio-sensing,force calculation,and determination of particle and environmental ***,the trapping stiffness measurement(TSM)methods of inorganic nanoparticles have rarely been analyzed and ***,in this review,the principle and methods of TSM are *** also systematically summarize the progress in acquiring inorganic particles trapping stiffness and its promising *** addition,we provide prospects of the energy and environment applications of optical tweezering technique and ***,the challenges and future directions of achieving the nanoparticles trapping stiffness are discussed.

关键词： Optical tweezers Optothermal tweezers Trapping stiffness measurement Inorganic nanoparticles Energy and environment applications

CRISPR-powered optothermal nanotweezers:Diverse bio-nanoparticle manipulation and single nucleotide identification

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Light(Science & Applications) 2023年第12期12卷 2644-2654页

作者： Jiajie Chen Zhi Chen Changle Meng Jianxing Zhou yuhang Peng Xiaoqi Dai Jingfeng Li Yili Zhong Xiaolin Chen Wu Yuan Ho-Pui Ho Bruce Zhi Gao Junle Qu Xueji Zhang han Zhang Yonghong Shao State Key Laboratory of Radio Frequency Heterogeneous Integration Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronics EngineeringShenzhen UniversityShenzhen 518060China Department of Biomedical Engineering The Chinese University of Hong KongShatinHong KongChina Department of Bioengineering and COMSET Clemson UniversityClemsonSC 29634USA School of Biomedical Engineering Shenzhen UniversityShenzhenGuangdong 518060China

Optothermal nanotweezers have emerged as an innovative optical manipulation technique in the past decade,which revolutionized classical optical manipulation by efficiently capturing a broader range of ***,the optothermal temperature field was merely employed for in-situ manipulation of nanoparticles,its potential for identifying bio-nanoparticles remains largely ***,based on the synergistic effect of optothermal manipulation and CRIPSR-based bio-detection,we developed CRISPR-powered optothermal nanotweezers(CRONT).Specifically,by harnessing diffusiophoresis and thermo-osmotic flows near the substrate upon optothermal excitation,we successfully trapped and enriched DNA functionalized gold nanoparticles,CRISPR-associated proteins,as well as DNA ***,we built an optothermal scheme for enhancing CRISPR-based single-nucleotide polymorphism(SNP)detection at single molecule level,while also introducing a novel CRISPR methodology for observing nucleotide ***,this innovative approach has endowed optical tweezers with DNA identification ability in aqueous solution which was unattainable *** its high specificity and feasibility for in-situ bio-nanoparticle manipulation and identification,CRONT will become a universal tool in point-of-care diagnosis,biophotonics,and bio-nanotechnology.

关键词： manipulation thermal identification