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Sources of dissolved inorganic carbon in rivers from the Changbaishan area, an active volcanic zone in North Eastern China

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Acta Geochimica 2017年第3期36卷 410-415页

作者： Xue Bai Benjamin Chetelat yilong song Institute of Surface-Earth System Science Tianjin University 92 Weijin Road Tianjin 300072 China School of Environmental Engineering Tianjin University 92 Weijin Road Tianjin 300072 China

Major elements and carbon isotopes of dissolved inorganic carbon(DIC)have been measured in the waters of Changbaishan mountain,a volcanic area in northeastern China,between June and September 2016 to decipher the origin of the CO_2 involved in chemical weathering *** variations of major elements ratios measured in water samples can be explained by a change of the chemical composition of the volcanic rocks between the volcanic cone(trachytes)and the basaltic shield as evidenced by the variations in the composition of these ***,DIC results from the neutralization of CO_2 by silicate *** concentrations vary from 0.3 to 2.5 mmol/L and carbon isotopic compositions of DIC measured in rivers vary from-14.2‰to 3.5‰.At a first order,the DIC transported by rivers is derived from the chemical weathering’s consumption of CO_2 with a magmatic origin,enriched in^(13)C(-5%)and biogenic soil CO_2 with lower isotopic *** highest δ^(13)C values likely result from C isotopes fractionation during CO_2 degassing in rivers.A mass balance based on carbon isotopes suggest that the contribution of magmatic CO_2 varied from less than 20%to more than 70%.Uncertainties in this calculation associated with CO_2 degassing in rivers are difficult to quantify,and the consequence of CO_2 degassing would be an overestimation of the contribution of DIC derived from the neutralization of magmatic CO_2 by silicate rocks.

关键词： Carbon isotopes Dissolved inorganic carbon Rivers Chemical weathering Changbaishan Active volcanic zone

Stable and Highly Flexible Perovskite Solar Cells with Power Conversion Efficiency Approaching 20% by Elastic Grain Boundary Encapsulation

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CCS Chemistry 2021年第7期3卷 2035-2044页

作者： Chengda Ge Ziqi Yang Xiaoting Liu yilong song Anran Wang Qingfeng Dong State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012

Here,we show that flexible perovskite solar cells(PSCs)with high operational stability and power conversion efficiency(PCE)approaching 20%were achieved by elastic grain boundary(GB)*** introduction of trimethyltrivinylcyclotrisiloxane(V3D3)and solvent annealing(SA)resulted in an in situ cross-linking reaction between GBs and enlarged grain size that enabled oriented charge-transport properties to be achieved synchronously,leading to reduced sheet resistance with a high fill factor(FF)up to 82.93%in flexible PSCs.

关键词： flexible perovskite solar cells cross-linking elastic grain boundaries operational stability mechanical stability

Development of robust perovskite single crystal radiation detectors with high spectral resolution through synergetic trap deactivation and self-healing

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InfoMat 2023年第9期5卷 26-37页

作者： Lixiang Wang yilong song Liqi Li Liting Tao Minxing Yan Weihui Bi Xueying Yang Yuan Sun Qingfeng Dong Deren Yang Yanjun Fang State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang UniversityHangzhouthe People's Republic of China State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchunthe People's Republic of China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuanthe People's Republic of China

Organic-inorganic halide perovskite single crystals(SCs)are promising materials for detecting ionizing radiation owing to their outstanding photoelectric conversion capability and inexpensive solution ***,the accuracy and stability of the detectors have been limited due to the charge traps and defects in SCs,especially when operated under high-precision photon-counting mode for energy spectrum ***,we proposed a trap freezing deactivation route,which obviously suppressed dark current and noise by up to 97%and 92%,***,the bulk ion migration effect was essential for the ability to instantly self-heal defects induced by radiation damage at temperatures down to30***,the detector exhibits a record high energy resolution of 7.5%at 59.5 keV for 241Amγ-ray source,which is the best solution-processed semiconductor radiation detectors at the same energy *** addition,the detector maintains over 90%of its initial performance after 9 months of storage when tested in the *** results will represent a revision of the paradigm that high-spectral-resolution and robust radiation detectors can only be realized with high temperature grown inorganic semiconductor single crystals.

关键词： energy resolution perovskite single crystal photon counting radiation detector self-healing stability

Atomistic Surface Passivation of CH_(3)NH_(3)PbI_(3) Perovskite Single Crystals for Highly Sensitive Coplanar-Structure X-Ray Detectors

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Research 2020年第1期2020卷 956-965页

作者： yilong song Liqi Li Weihui Bi Mingwei Hao Yifei Kang Anran Wang Zisheng Wang Hanming Li Xiaohui Li Yanjun Fang Deren Yang Qingfeng Dong State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China

Organic-inorganic halide perovskites(OIHPs)are recognized as the promising next-generation X-ray detection ***,the device performance is largely limited by the ion migration issue of ***,we reported a simple atomistic surface passivation strategy with methylammonium iodide(MAI)to remarkably increase the ion migration activation energy of CH_(3)NH_(3)PbI_(3)single *** amount of MAI deposited on the crystal surface is finely regulated by a self-assemble process to effectively suppress the metallic lead defects,while not introducing extra mobile ions,which results in significantly improved dark current stability of the coplanar-structure devices under a large electric field of 100Vmm^(-1).The X-ray detectors hence exhibit a record-high sensitivity above 700,000μC Gy^(-1)_(air) cm^(-2)under continuum X-ray irradiation with energy up to 50 keV,which enables an ultralow X-ray detection limit down to 1.5 nGy_(air)s^(-1).Our findings will allow for the dramatically reduced X-ray exposure of human bodies in medical imaging applications.

关键词： Highly planar hence

Multiple Hydrogen Bond-Induced Structural Distortion for Broadband White-Light Emission in Two-Dimensional Perovskites

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CCS Chemistry 2021年第10期3卷 2576-2583页

作者： Xiaoting Liu Ziqi Yang Chengda Ge Hanming Li Mingwei Hao Chenlian Wan yilong song Bao Li Qingfeng Dong State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012

Low-dimensional hybrid lead-halide perovskites with broadband white-light emission upon near-UV excitation have attracted immense scientific interest due to their potential application for the next generation of solid-state lighting as well as scintillators for radiation ***,broadband emission material is mostly reported in structural distorted ***,it is still unclear how to generate structural distortion in low-dimensional perovskites.

关键词： two-dimensional perovskites biguanide supramolecular interaction self-trap ping broad-band emis sion

Detector-grade perovskite single-crystal wafers via stress-free gel-confined solution growth targeting high-resolution ionizing radiation

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Light(Science & Applications) 2023年第5期12卷 754-765页

作者： yilong song Lixiang Wang Yongqiang Shi Weihui Bi Jianwu Chen Mingwei Hao Anran Wang Xueying Yang Yuan Sun Fan Yu Liansheng Li Yanjun Fang Deren Yang Qingfeng Dong State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China Beijing Institute of Control Engineering Beijing 100190China Science and Technology on Space Intelligent Control Laboratory Beijing 100190China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan 030024China

Solution-processed organic‒inorganic halide perovskite(OIHP)single crystals(SCs)have demonstrated great potential in ionizing radiation detection due to their outstanding charge transport properties and low-cost ***,the energy resolution(ER)and stability of OIHP detectors still lag far behind those of melt-grown inorganic perovskite and commercial CdZnTe counterparts due to the absence of detector-grade high-quality OIHP ***,we reveal that the crystallinity and uniformity of OIHP SCs are drastically improved by relieving interfacial stress with a facial gel-confined solution growth strategy,thus enabling the direct preparation of large-area detector-grade SC wafers up to 4 cm with drastically suppressed electronic and ionic *** resultant radiation detectors show both a small dark current below 1 nA and excellent baseline stability of 4.0×10^(-8) nA cm^(-1) s^(-1) V^(-1),which are rarely realized in OIHP ***,a record high ER of 4.9% at 59.5 keV is achieved under a standard 241Am gamma-ray source with an ultralow operating bias of 5 V,representing the best gamma-ray spectroscopy performance among all solution-processed semiconductor radiation detectors ever reported.

关键词： resolution confined stress

Nanostructure of Nacre and Its Mechanical Effects

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Nanostructure of Nacre and Its Mechanical Effects

2002年微纳米国际会议

作者： Fan song and yilong BaiState Key Laboratory of Nonlinear Mechanics (LNM) Institute of Mechanics Chinese Academy of Sciences Beijing 100080 China

＜正＞ A type of nanostructure in the organic matrix interfaces of nacre, which is referred to as mineral bridge in the biomineralization, is directly observed with a transmission electron microscope. It is showed that the existence of mineral bridges in nacre is confirmed. Statistical analysis gives the geometrical characteristics and distribution law of the nanostructure in the organic matrix interfaces. Mechanical experiments and analyses demonstrate that mineral bridges play a key role in mechanical properties of nacre. The nanostructure can not only effectively increase the crack resistance of the organic matrix interfaces, but also automatically form periodic crack resistance to prevent cracks from extending in nacre. This is an indication that the microarchitecture of nacre should be referred to as a “brick-bridge-mortar”arrangement rather than traditional “brick and mortar”one, which gives a conceptual guide to the biomimetic design of synthetic materials.

关键词： Nanostructure mineral bridges nacre mechanical properties

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直接电纺纤维海绵的制备及应用

化学进展 2023年第11期35卷 1686-1700页

作者：宋一龙赵爽李昆锋费志方陈国兵杨自春海军工程大学动力工程学院武汉430033

静电纺丝纤维海绵是一种以一维纤维为构筑单元的蓬松三维(3D)材料,由于维度的增加,该材料具备许多比传统电纺薄膜更加突出的优点,在各领域都表现巨大的应用潜力。随着对电纺三维结构研究的深入,如何直接通过静电纺丝获取稳定的纤维海绵... 详细信息

静电纺丝纤维海绵是一种以一维纤维为构筑单元的蓬松三维(3D)材料,由于维度的增加,该材料具备许多比传统电纺薄膜更加突出的优点,在各领域都表现巨大的应用潜力。随着对电纺三维结构研究的深入,如何直接通过静电纺丝获取稳定的纤维海绵并提高其性能已成为当前面临的关键挑战。本文系统综述了近年来直接电纺制备纤维海绵的各种新策略,讨论了其内在机理、特点以及代表性的研究成果,总结了该材料在组织工程、环境治理、安全防护和智能设备等领域的应用现状,提出了其现阶段面临的一些挑战,展望了电纺海绵在未来的发展方向。

关键词：直接电纺三维结构纤维固化组织工程环境保护

热处理温度对SiO_(2)微纳纤维形貌及隔热性能的影响

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材料导报 2022年第12期36卷 224-228页

作者：宋一龙赵芳李志尊程兆刚黄红军陆军工程大学石家庄校区石家庄050003

为探究煅烧温度与纤维膜隔热性能之间的关系,以正硅酸乙酯(TEOS)和聚乙烯吡络烷酮(PVP)为主要原料,采用静电纺丝技术结合后续热处理制备了SiO_(2)微纳纤维膜。利用热重⁃差热联用热分析仪、X射线衍射仪、傅里叶变换红外光谱仪、扫描电子... 详细信息

为探究煅烧温度与纤维膜隔热性能之间的关系,以正硅酸乙酯(TEOS)和聚乙烯吡络烷酮(PVP)为主要原料,采用静电纺丝技术结合后续热处理制备了SiO_(2)微纳纤维膜。利用热重⁃差热联用热分析仪、X射线衍射仪、傅里叶变换红外光谱仪、扫描电子显微镜和导热系数仪研究了SiO_(2)/PVP杂化纤维膜的热分解过程以及热处理温度对其产物物相组成、微观形貌和隔热性能的影响。结果表明:杂化纤维膜经600℃及以上温度热处理后,产物均为无定形态SiO_(2);随着热处理温度的升高,无定形态SiO_(2)有向晶态转化的趋势,且纤维的平均直径呈先减小后增大的规律。产物的热导率与纤维直径呈正相关,当热处理温度为800℃时,SiO_(2)微纳纤维的平均直径最小,热导率最低(0.0325 W/(m·K)),其隔热性能优于600℃、1000℃热处理温度下的样品,也优于传统石英纤维隔热毡。本工作为SiO_(2)纤维膜隔热性能的优化提供了一定的实验基础。

关键词： SiO_(2) 微纳纤维静电纺丝热处理温度导热系数