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Multidentate anchoring through additive engineering for highly efficient Sb_(2)S_(3)planar thin film solar cells

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Journal of Materials Science & Technology 2021年第30期89卷 36-44页

作者： Jian Han Xingyu Pu Hui Zhou qi cao Shuangjie Wang Jiabao Yang Junsong Zhao Xuanhua Li State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Northwestern Polytechnical University-Queen Marry University of London(NPU-QMUL)Joint Research Institute of Advanced Materials and Structures(JRI-AMAS)Xi’an 710072China

Sb_(2)S_(3)is a promising candidate for the flexible solar cells or the top subcells in tandem solar cells due to its wide-bandgap,less toxic,acceptable cost and progressive power conversion efficiency(PCE).However,the poor quality and high trap states of Sb_(2)S_(3)films limit the device performance further ***,we adopt a multidentate ionic liquid,tetramethylammonium hexafluorophosphate([TMA][PF_(6)])as a novel additive to address this *** octahedral[PF_(6)]~-contains six different oriented fluorine atoms with the lone pair electrons,which could coordinate with Sb atoms due to the multidentate ***,the high-quality Sb_(2)S_(3)film with low trap states has been ***,the Fermi level of the Sb_(2)S_(3)film has been upshifted,thereby showing an effective charge *** a result,all photovoltaic parameters of the optimized Sb_(2)S_(3)devices are obviously enhanced,boosting the final PCE from 4.43(control device)to 6.83%.Our study about the multidentate anchoring is manifested to be an effective method to enhance the Sb_(2)S_(3)device performance.

关键词： Sb_(2)S_(3) Solar cells Additive engineering Multidentate anchoring Passivation

Construction of Aniline Trimer Based Conjugated Polymers through Schiff Base Reaction and Their Use as Feedstock for Infrared Stealth Coatings

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Chinese Journal of Polymer Science 2023年第6期41卷 851-858,I0005页

作者： Xiang-Yu Li Li-Shuai Zong Yi-Bo Wang qi cao Jin-Yan Wang Xi-Gao Jian State Key Laboratory of Fine Chemicals Liaoning High Performance Resin Engineering Research CenterDepartment of Polymer Science&EngineeringDalian University of TechnologyDalian 116024China

In order to meet the demand for infrared stealth materials in the military field,conjugated polymers containing Schiff base moieties were designed and *** dialdehyde monomers were introduced and their effect on the comprehensive properties were systematically *** resulted polymers could be cast in solution to prepare polymer *** coatings exhibited high thermal stability up to 400℃ at 5%weight loss,and excellent mechanical performance with high Young’s modulus and *** infrared emissivity values varied from 0.587 to 0.627 at wavelength of 8-14μm and ranged from 0.595 to 0.609 at wavelength of 2-22μ***,it was found that the ATTPAL structure with carbazole moieties had a lower band gap and better electrical conductivity by photoelectric test and DFT theoretical ***,the infrared emissivity value of ATTPAL coating was the lowest compared with p-phenyl and pyridyl containing analogues,suggesting it was potential material for the future development of infrared stealth *** combined results showed that reducing the band gap and improving the electrical conductivity of the structure were both beneficial to the reduction of infrared *** would positively provide new ideas for the design of infrared stealth materials.

关键词： materials Schiff conductivity

Characterizations of gas-liquid interface distribution and slug evolution in a vertical pipe

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Petroleum Science 2023年第5期20卷 3157-3171页

作者： Hai-Yang Yu qiang Xu Ye-qi cao Bo Huang Han-Xuan Wang Lie-Jin Guo State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong UniversityXi’an710049ShaanxiChina

Large vertical pipes are key structures connecting subsea wells to offshore ***,existing studies mainly focus on small vertical *** a vertical acrylic pipe with 80 mm inner diameter and 11 m height,a high-speed camera was used to visually research the influences of pipe diameters,liquid properties and inlet effect on air-water co-flow *** flow regime maps of vertical pipes(diameters are in the range of 50e189 mm)were compared and the critical gas velocity of the transition boundary from bubble to slug flow tended to increase with the increase of diameters at D≥80 ***-flux models were established in different flow regimes and liquid properties have a significant effect on drift coefficients of bubble flow and slug flow(void fraction a≤0.4).The influence of inlet turbulent effect on the gas-liquid interface distribution gradually weakened and disappeared from the pipe base to 85D,where the flow was fully *** frequency has a trend of increase first and then decrease with the gas Weber numbers increasing at low liquid superficial velocities(J_(L)≤0.31 m/s).And on the basis of this law,a new slug frequency correlation was *** was found that there was an exponential relationship between the ratio of lengths of Taylor bubble to slug and the void fraction.

关键词： Void fraction Flow regime Drift coefficien Slug frequency Taylor bubble length

Fabrication of solid-phase-sintered Si C-based composites with short carbon fibers

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International Journal of Minerals,Metallurgy and Materials 2014年第11期21卷 1141-1145页

作者： Xian-hui Li qing-zhi Yan Yong-jun Han Mei-qi cao Chang-chun Ge Institute of Special Ceramics and Powder Metallurgy University of Science and Technology Beijing

Solid-phase-sintered Si C-based composites with short carbon fibers（Csf/SSi C） in concentrations ranging from 0 to 10wt% were prepared by pressureless sintering at 2100°C. The phase composition, microstructure, density, and flexural strength of the composites with different Csf contents were investigated. SEM micrographs showed that the Csf distributed in the SSi C matrix homogeneously with some gaps at the fiber/matrix interfaces. The densities of the composites decreased with increasing Csf content. However, the bending strength first increased and then decreased with increasing Csf content, reaching a maximum value of 390 MPa at a Csf content of 5wt%, which was 60 MPa higher than that of SSi C because of the pull-out strengthening mechanism. Notably, Csf was graphitized and damaged during the sintering process because of the high temperature and reaction with boron derived from the sintering additive B4C; this graphitization degraded the fiber strengthening effect.

关键词： fiber-reinforced composites silicon carbide carbon fibers solid phase sintering microstructure

Achieving higher performances without an external curing agent in natural magnolol-based epoxy resin

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Chinese Chemical Letters 2022年第4期33卷 2195-2199页

作者： qi cao Zhihuan Weng Yu qi Jiahui Li Wentao Liu Chengde Liu Shouhai Zhang Zhiyong Wei Yousi Chen Xigao Jian State Key Laboratory of Fine Chemicals Liaoning High Performance Resin Engineering Research CenterDepartment of Polymer Science&EngineeringDalian University of TechnologyDalian 116024China

Bio-based epoxy thermoset prepared from renewable biomass raw materials can alleviate fossil energy crisis and reduce environmental pollution,which satisfies the needs of sustainable social *** this study,a bio-based epoxy thermoset precursor(MGOL-EP) was synthesized from a naturally occurring magnolol through a facile and efficient one-step *** the fully bio-based epoxy thermoset(MGOL-EP-SC) was obtained by self-curing without adding any other ***-EP-SC revealed an extremely high glass-transition temperature(T_(g)) of 265℃ and char yield of 53.2%(in N;),which were at the highest level among the fully bio-based epoxy thermosets reported so *** addition,when the MGOL-EP was cured with 4,4’-methylenedianiline(DDM),T_(g)of the MGOL-EP/DDM was decreased by 61℃ and the other comprehensive performance had also been decreased,which was due to a reduction in biphenyl structure content and cross-linking density by adding the external curing ***,the MGOL-EP-SC presented certain killing rate(48.4%) to Staphylococcus *** findings provide a new design strategy for engineering high-performance and functional epoxy thermoset with high biomass content.

关键词： Epoxy resin Magnolol Self-curing Fully bio-based Antimicrobial properties

高迁移率族蛋白B1在儿童脊髓损伤中的作用机制及康复策略

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中国细胞生物学学报 2025年第1期47卷 158-164页

作者：曹琦兰州大学第二医院兰州730000

儿童脊髓损伤(childhood spinal cord injury,CSCI)是指由于各种原因导致的14岁以下儿童的脊髓结构异常变化和功能损害,可能导致患者运动、感觉和自主神经功能的丧失或异常,对儿童患者造成严重的不良结局。由于脊髓损伤具有不可逆性,目... 详细信息

儿童脊髓损伤(childhood spinal cord injury,CSCI)是指由于各种原因导致的14岁以下儿童的脊髓结构异常变化和功能损害,可能导致患者运动、感觉和自主神经功能的丧失或异常,对儿童患者造成严重的不良结局。由于脊髓损伤具有不可逆性,目前医学界尚无策略治愈CSCI,因此CSCI的康复治疗尤为重要。高迁移率族蛋白B1(high mobility group protein B1,HMGB1)作为一种重要的炎症介质,在脊髓损伤后的病理生理过程中具有关键作用。儿童脊髓损伤患者由于其特殊的生理背景和发育阶段,对HMGB1的响应与成人有所不同,因此深入探讨其作用机制尤为重要。该文概述了HMGB1的基本性质和功能,详细阐述了HMGB1在CSCI后的表达模式及其在神经损伤、炎症反应和细胞凋亡等病理过程中的机制。针对HMGB1的作用机制,该文探讨了相关的康复治疗策略,为CSCI的疾病管理提供了新的思路和方法。

关键词：高迁移率族蛋白B1 儿童康复治疗生物标志物脊髓损伤

Insights into the efficiency and stability of Cu-based nanowires for electrocatalytic oxygen evolution

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Nano Research 2018年第8期11卷 4323-4332页

作者： Jun Yu qi cao Bin Feng Changli Li Jingyuan Liu J. Kenji Clark Jean-Jacques Delaunay Department of Mechanical Engineering The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan Institute of Engineering Innovation The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan School of Materials Science and Engineering Tsinghua University Beijing 100084 China Department of Chemical System Engineering The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan

Copper oxide nanowires with varying oxidation states are prepared and their activity for water oxidation is studied. The nanowires with a CuO phase are found to be the most active, and their degree of crystallinity is important in achieving efficient water oxidation. For the crystalline CuO nanowires in a weakly basic Na2CO3 electrolyte, a Tafel slope of 41 mV/decade, an overpotential of approximately 500 mV at - 10 mA/crn2 （without compensation for the solution resistance）, and a faradaic efficiency of nearly 100% are obtained. This electrode maintains a stable current for over 15 lx The low overpotential of 500 mV at 10 mA/cm2, small Tafel slope, long-term stability, and low cost make CuO one of the most promising catalysts for water oxidation. Moreover, the evolution of the CuO nanowire morphology over time is studied by electron microscop）-revealing that the diffusion of Cu ions from the interior of the nanowires to their surface causes the aggregation of individual nanowires over time. However, despite this aggregation, the current density remains nearly constant, because the total electrochemically active surface area of CuO does not change.

关键词： oxygen evolution reaction crystalline CuO active phase copper ion diffusion

Therapeutic effect of secretome from TNF-αstimulated mesenchymal stem cells in an experimental model of corneal limbal stem cell deficiency

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International Journal of Ophthalmology(English edition) 2021年第2期14卷 179-185页

作者： Guo-Hu Di Xia qi Jing Xu Chao-Qun Yu qi-Long cao Zhi-Jun Xing Zhi-Chao Li School of Basic Medicine Qingdao UniversityQingdao266071Shandong ProvinceChina Shandong Eye Institute Qingdao266071Shandong ProvinceChina qingdao Haier Biotech Co.Ltd. Qingdao266071Shandong ProvinceChina qingdao Hospital of Traditional Chinese Medicine(qingdao Hiser Hospital) Qingdao266033Shandong ProvinceChina Department of Gynecology and Obstetrics Qingdao Municipal HospitalQingdao UniversityQingdao266033Shandong ProvinceChina

AIM:To explore the secretome efficacy in tumor necrosis factor(TNF)-αstimulated mouse mesenchymal stem cells(MSCs)in a murine model of corneal limbal alkali ***:Corneal limbal stem cell deficiency(LSCD)was created in the eyes of male C57 *** conditioned medium from TNF-αstimulated MSCs(MSC-CMT)was applied topically for 4 wk,with basal medium and conditioned medium from MSCs as *** opacification,corneal inflammatory response,and corneal neovascularization(NV)were *** epithelial cell apoptosis,corneal conjunctivation,and inflammatory cell infiltration were assessed with TUNEL staining,CK3 and Muc-5 AC immunostaining,and CD11 b immunofluorescence staining,*** effect of TSG-6 was further evaluated by knockdown with short hairpin RNA(sh RNA).RESULTS:Compared to the controls,topical administration of MSC-CMT significantly ameliorated the clinical symptoms of alkali-induced LSCD,with restrained corneal NV,reduced corneal epithelial cell apoptosis,and inhibition of corneal *** addition,MSC-CMT treatment significantly reduced CD11 b+inflammatory cell infiltration,and inhibited the expression of pro-inflammatory cytokines(IL-1β,TNF-αand IL-6).Furthermore,the promotion of corneal epithelial reconstruction by MSC-CMT was largely abolished by TSG-6 ***:Our study provides evidence that MSCCMT enhances the alleviation of corneal alkali injuries,partially through TSG-6-mediated anti-inflammatory protective ***-CMT may serve as a potential strategy for treating corneal disorders.

关键词： MSC-CMT limbal stem cell deficiency TSG-6

Tailoring the mercaptan ligands for high performance inverted perovskite solar cells with efficiency exceeding 21%

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Journal of Energy Chemistry 2021年第9期30卷 169-177页

作者： Shuangjie Wang Ziwei He Jiabao Yang Tongtong Li Xingyu Pu Jian Han qi cao Bingyu Gao Xuanhua Li Research&Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518057China State Key Laboratory of Solidification Processing Center for Nano Energy MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China

Interface passivation engineering has been recognized as an effective way to simultaneously contribute to the optoelectronic characteristic and stability of perovskite solar cells(PSCs). Herein, a p-conjugated dual-ligand 1,4-phenylmercaptan(PHMT) is explored to rationally tailor the surface of perovskite *** experimental and theoretical results show that the PHMT presents planar structure and obvious electron delocalization characteristics, which allow it to anchor on the surface of perovskite with a certain orientation, thereby promoting the transport of interface charge. Moreover, the two sulfhydryl groups in PHMT reduce the trap density of the perovskite film by passivating under-coordinated lead ***, the PHMT-modified inverted device based on MAPbI_(3)(MA: methylammonium) achieves enhanced efficiency from 18.11%(control) to 21.11%, along with the ambient stability up to 3500 *** being placed at 85 °C for 500 h or illuminated for 600 h, the modified device remains over 89%or 86% of initial efficiency. This discovery opens a new window for the choice of passivators to improve the performance of PSCs.

关键词： Perovskite solar cells Stability Dual-ligand Passivation Mercaptan