检索结果-内蒙古大学图书馆

Review on g-C_(3)N_(4)-based S-scheme heterojunction photocatalysts

Journal of materials science & Technology 2022年第30期125卷 128-144页

作者： Yunfeng Li Zhiling Xia Qing Yang Linxi Wang Yan Xing Xi’an Key Laboratory of Textile Chemical Engineering Auxiliaries College of Environmental and Chemical EngineeringXi’an Polytechnic UniversityXi’an 710000China Laboratory of Solar Fuel Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430074China Jilin Provincial Key Laboratory of Advanced Energy Materials Department of ChemistryNortheast Normal UniversityChangchun 130024China

With the rapid development of economy and modern industry,serious environmental pollution and energy shortage have become major urgent challenges to the human *** is a promising technology to provide green *** a typical metal-free polymer photocatalyst,g-C_(3)N_(4) has attracted more and more attention due to its excellent ***,the fast recombination of photo-induced charges,limited light response range as well as weak oxidation ability are still the key drawback that restrict the photocatalytic performance of g-C_(3)N_(4).These problems can be effectively addressed by constructing g-C_(3)N_(4)-based heterojunctions with two or more semiconductor materials,during which the respective advantages can be *** to now,the various oxidation semiconductor photocatalysts have been tried to construct the novel S-scheme heterojunction photocatalysts with g-C_(3)N_(4).Thus,this review provides a comprehensive introduction of g-C_(3)N_(4)-based S-scheme heterojunctions,including the main characteristics of the S-scheme heterojunction,photocatalytic mechanisms,design rules and preparation methods of g-C_(3)N_(4)-based S-scheme heterojunction ***,this review summarizes recently reported works on the potential applications of g-C_(3)N_(4)-based S-scheme photocatalysts in various important photocatalytic reactions,including photocatalytic hydrogen production,photocatalytic degradation of contaminants,photo-reduction of CO_(2) into fuels,and photocatalytic ***,based on the current research progress,we propose some shortages in the preparation methods and applications of g-C_(3)N_(4)-based S-scheme heterojunctions,which are to be further investigated and resolved in this promising and creative research field.

关键词： Photocatalysis Semiconductor g-C_(3)N_(4) Heterojunction S-scheme

来源：评论

学校读者我要写书评

暂无评论

Spin Injection from Ferromagnetic Semiconductor CoZnO into ZnO

引用

Journal of materials science & Technology 2008年第3期24卷 415-418页

作者： Gang JI Shishen YAN Yanxue CHEN Qiang CAO Wei XIA Yihua LIU Institute of Microstructure and Properties of Advanced Materials Beijing University of Technology Beijing 100124 China School of Physics and Microelectronics and National Key Laboratory of Crystal Materials Shandong University Jinan 250100 China School of Information Science and Engineering and National Key Laboratory of Crystal Materials Shandong University Jinan 250100 China

2x （FeNi/CoZnO）/ZnO/（CoZnO/Co） x2 spin-inJection devices were prepared by sputtering and photo-lithography. In the devices, two composite magnetic layers 2x（FeNi/CoZnO） and （CoZnO/Co）x2 with different coercivities were used to fabricate the ZnO-based semiconductor spin valve. Since the CoZnO ferromagnetic semiconductor layers touched the ZnO space layer directly, the significant spin injection from CoZnO into ZnO was observed by measuring the magnetoresistance of the spin-injection devices. The magnetoresistance reduced linearly with increasing temperature, from 1.12% at 90 K to 0.35% at room temperature.

关键词： Spin injection Magnetoresistance Ferromagnetic semiconductor

来源：评论

学校读者我要写书评

暂无评论

Vacuum carburization of 12Cr2Ni4A low carbon alloy steel with lanthanum and cerium ion implantation

引用

Journal of Rare Earths 2017年第11期35卷 1164-1170页

作者： Meiling Dong Xiufang Cui Yuhui Zhang Guo Jin Caiwen Yue Xin Zhao Zhaobing Cai Binshi Xu Institute of Surface/Interface Science and Technology Key Laboratory of Superlight Material and Surface Technology of Ministry of Education HarbinEngineering University Harbin 150001 China College of Materials Science and Chemical Engineering Harbin Engineering University Harbin 150001 China Dongan Engine Group Harbin 150060 China

As bearing parts, 12 Cr2 Ni4 A is expected to have high hardness and excellent fatigue strength, so carburizing is employed to improve the inherit properties of 12 Cr2 Ni4 A. However, the traditional carburizing is limited by poor microstructure distribution and low rate of carburizing. The rare earth ion implantation is known to help improving the properties of tribology, corrosion resistance and oxidation resistance of metal. In this article, the RE implantation is employed to assist the carburizing. Lanthanum and cerium ion implantations are initially used to assist 12 Cr2 Ni4 A low pressure vacuum *** microstructure, content of retained austenite, hardness, thickness of layer and carbon diffusion were analyzed by optical microscopy(OM), scanning electron microscopy(SEM), X-ray diffraction(XRD) and Rockwell/Vickers hardness tester, respectively. It was shown that lanthanum and cerium implantations can improve structure of the vacuum carburizing layer, and enhance the uniformity of carbon element distribution on the carburized surface. Meanwhile the RE implantation plays a positive role in promoting the surface hardness and carburized rate. The lanthanum element has more significant effect on surface hardness and content of retained austenite than cerium element. The surface hardness of lanthanum element implanted layer was 62.9 HRC with 9.6% content of retained austenite, while the carburizing rate of cerium implanted layer increased by 12.4%.

关键词： Vacuum carburization Ion implantation Lanthanum Cerium Diffusion

来源：评论

学校读者我要写书评

暂无评论

Effects of depth of discharge on the electrochemical performance of LiFePO4-graphite pouch cells

引用

Solid State Ionics 2025年 427卷

作者： Qiao, Xin Mu, Yahao Peng, Jian Pei, Bo Wang, Shuo Wuhan Institute of Marine Electric Propulsion Wuhan430064 China Center of Smart Materials and Devices State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Material Science and Engineering Wuhan University of Technology Wuhan430070 China

Lithium iron phosphate-graphite (LFP-C) batteries are widely used in energy storage and electric vehicles due to their high safety and good cycling stability. However, there is still a lack of in-depth research to investigate the impact of depth of discharge (DOD) on LFP-C pouch cells. In this work, we systematically investigate the influence of DOD (2.5 V and 1.5 V) on the cycling performance of LFP-C pouch cells, and the evolution of the cathode–electrolyte interphase (CEI) and solid electrolyte interphase (SEI) layers. In comparison to a DOD of 2.5 V, the cell with a DOD of 1.5 V exhibits a rapid capacity degradation after 50 cycles. Combined with comprehensive characterizations, the mechanism of battery decay has been revealed. A deeper discharge to 1.5 V results in an increase in the disorder of graphite. Additionally, the organic components in the SEI layer decreases, while the Li2CO3, LiF, and Li3PO4 inorganic products enrich due to the continued decomposition of electrolyte. Meanwhile, the pouch cells generate a considerable quantity of H2 and minor CH4 gases. This study will pave the way to understand the effects of overdischarge on the electrochemical performance of commercial pouch cells and the evolution mechanism of CEI/SEI layers. © 2025 Elsevier B.V.

关键词： Battery Pack

来源：评论

学校读者我要写书评

暂无评论

High thermally stable deep red-emitting Sb^(3+),Ho^(3+)-codoped Cs_(2)NaScCl_(6) double perovskite for plant lighting

引用

Journal of Rare Earths 2024年第11期42卷 2043-2050,I0002页

作者： Houjiang You Gaoxuanyu Guan Tianchun Lang Mingsheng Cai Peng Su Huichao He Yang Zhong Tao Han School of Metallurgy and Materials Engineering Chongqing University of Science and TechnologyChongqing401331China School of Material Science and Engineering Chongqing University of TechnologyChongqing400054China Chongqing Key Laboratory of Materials Surface&Interface Science Chongqing University of Arts and SciencesChongqing402160China Offshore Oil Engineering Co. Ltd.Tianjin300461China

Lead-free halide double perovskite has received widespread attention due to its excellent optical ***,the lack of deep red light and poor heat quenching resistance severely limit its application in plant lighting *** this work,Ho^(3+) was introduced into the thermally stable Cs_(2)NaScCl_(6)host,exhibiting a deep red emission of 660 *** constructing an energy transfer channel between Sb^(3+)and Ho^(3+),the photo luminescence quantum yield(PLQY) of Cs_(2)NaScCl_(6):1%Sb^(3+),40%Ho^(3+) rises up to53.8%,that is increased by 17 times,and its emission intensity can still be maintained by 80% at 423 K,exhibiting good heat quenching *** obtained Cs_(2)NaScCl_(6):1%Sb^(3+),40%Ho^(3+) and Cs_(2)NaScCl_(6):1%Sb^(3+) with blue light emission were employed for fabricating a light-emitting diode(LED) device with a340 nm UV chip,and its emission spectrum matches well the absorption spectra of chlorophyll A and chlorophyll B with the high resemblance of 70% and 75%,making it suitable for use as an artificial light source to control the growth process of plants in the field of plant lighting.

关键词： Lead-free halide double perovskite Energy transfer Thermally stable Plant lighting Rare earths

来源：评论

学校读者我要写书评

暂无评论

One-dimensional Vanadyl Phosphate Containing the Tancoite-like{Ⅴ^(Ⅳ)O(HPO_4)_2}^(2–)Chain

引用

Chinese Journal of Structural Chemistry 2013年第12期32卷 1821-1828页

作者： WEN Lei HUANG Ya-Xi SUN Wei LIU Biao HUANG Chun-Zuo MI Jin-Xiao ZHUANG Rong-Chuan TANG Mei-Bo ZHAO Jing-Tai Fujian Provincial Key Laboratory of Advanced Materials Department of Materials Science and EngineeringCollege of MaterialsXiamen University Xiamen Zijin Mining and Metallurgy Technology Co.Ltd. State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of Sciences

A vanadyl phosphate containing a new member of tancoite-like single chain, （DAPH2）[VIVO（HPO4）2]·xH20 （x ≈ 0.2, DAP = 1,3-diaminopropane, C3H10N2）, has been synthesized under hydro（solvo）thermal conditions. It crystallizes in orthorhombic space group P21212 （No. 18） with a = 7.1730（14）, b = 19.252（4）, c = 8.6557（17） A, Z= 4, V= 1195.3（4）A3, C3H14.38N2P2VO9.19, Mr = 338.47, Dc = 1.881 g/cm3,μ（MoKa） = 1.138 mm-1 and F（000） = 692. The final full-matrix least-squares refinement converged to R = 0.0408, wR = 0.1046 for 2498 observed reflections with I 〉 2σ（I） and R = 0.0456 and wR = 0.1080 for all data （2750） and S = 1.001. Its one-dimensional 1 structure consists of tancoite-like ∞1 {vIVO（HPO4）2}2- single chains surrounded by DAPH22＋ ions and water molecules. The single chain is built from trans-corner-sharing octahedral {VIV= O…VIV} backbone loop-branched by HPO4 groups like staple forming a new member of tancoite single chain. Due to the special coordination of VIVO6, the ∞1 {VO（HPO4）2-} chain adopts a larger M-O-M angle （V-O-V = 135°） than those of tancoite chains reported before. The corner-sharing linear {VIV = O…VIV} chain structure also leads to a one-dimensional weak antiferromagnetic interaction at low temperature. The magnetic measurements confirm the 4＋ valence state of vanadium. IR and TG results of the title compound are also discussed.

关键词： magnetic properties one-dimensional structure,phosphate tancoite-like single chain vanadium

来源：评论

学校读者我要写书评

暂无评论

Facile ball-milled synthesis of SnS2-carbon nanocomposites with superior lithium storage

引用

Progress in Natural science:materials International 2018年第6期28卷 676-682页

作者： Haihua Zhao Hong Zeng Ying Wu Wen Qi Shengen Zhang Bo Li Yunhui Huang Central Iron and Steel Research Institute Institute for Advanced Materials Technology and School of Materials Science and Engineering University of Science and Technology Beijing Beijing Key Laboratory of Energy Nanomaterials Advance Technology & Materials Co. Ltd China Iron & Steel Research Institute Group Materials Center Beijing Institute of Collaborative Innovation State Key Laboratory of Material Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology

A facile high-energy ball-milling method was developed to synthesize SnS2-carbon(SnS2/C-x（x = 40, 50, 60 wt%）) nanocomposites. The results showed that as anode materials for lithium-ion batteries（LIBs）, the SnS2-C nanocomposites exhibited high discharge capacity and excellent cycling stability. For the optimized SnS2/C-50 wt% nanocomposite, a discharge capacity as high as 700 mA h g-1and the initial coulombic efficiency of 80.8% were achieved at a current density of 100 mA g-1. The unique structure with SnS2nanoparticles（NPs）embedded into carbon network provided abundant Li-ion storage sites, high electronic conductivity and fast ion diffusion. The ball-milled synthesis is applicable for large-scale preparation of new sulfide-based anode materials with good performance for LIBs.

关键词： SnS2-carbon Nanocomposites Ball milling Anode Lithium-ion battery

来源：评论

学校读者我要写书评

暂无评论

Correction: Chitosan-based inks for 3D printing and bioprinting (Green Chemistry (2022) 24 (62-101) DOI: 10.1039/D1GC01799C)

引用

Green Chemistry 2025年第18期27卷 5388-5388页

作者： Mohsen Taghizadeh Ali Taghizadeh Mohsen Khodadadi Yazdi Payam Zarrintaj Florian J. Stadler Joshua D. Ramsey Sajjad Habibzadeh Somayeh Hosseini Rad Ghasem Naderi Mohammad Reza Saeb Masoud Mozafari Ulrich S. Schubert College of Materials Science and Engineering Shenzhen Key Laboratory of Polymer Science and Technology Guangdong Research Center for Interfacial Engineering of Functional Materials Shenzhen University Shenzhen 518060 PR China Center of Excellence in Electrochemistry School of Chemistry College of Science University of Tehran Tehran Iran School of Chemical Engineering Oklahoma State University 420 Engineering North Stillwater OK 74078 USA Department of Chemical Engineering Amirkabir University of Technology (Tehran Polytechnic) Tehran 15916-39675 Iran Department of Mechanical Engineering Polytechnique Montreal Montreal QC Canada Iran Polymer and Petrochemical Institute (IPPI) Tehran Iran Department of Polymer Technology Faculty of Chemistry Gdańsk University of Technology G. Narutowicza 11/12 80-233 Gdańsk Poland Department of Tissue Engineering & Regenerative Medicine Faculty of Advanced Technologies in Medicine Iran University of Medical Sciences Tehran Iran Laboratory of Organic and Macromolecular Chemistry (IOMC) Friedrich Schiller University Jena Humboldtstrasse 10 07743 Jena Germany Center for Energy and Environmental Chemistry Jena (CEEC Jena) Friedrich Schiller University Jena Philosophenweg 7a 07743 Jena Germany

In the original publication, an incorrect citation was erroneously included for ref. 161. The authors would like to replace ref. 161 with the correct citation, which is shown below as ref. 1. The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers. © 2025 The Royal Society of Chemistry.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Enhanced thermoelectric properties in two-dimensional monolayer Si2BN by adsorbing halogen atoms

引用

Chinese Physics B 2021年第3期30卷 41-47页

作者： Cheng-Wei Wu Changqing Xiang Hengyu Yang Wu-Xing Zhou Guofeng Xie Baoli Ou Dan Wu School of Materials Science and Engineering&Hunan Provincial Key Laboratory of Advanced Materials for New Energy Storage and Conversion Hunan University of Science and TechnologyXiangtan 411201China College of Information Science and Engineering Jishou UniversityJishou 416000China School of Physics and Electronic Science Changsha University of Science and TechnologyChangsha 410114China

Using the first principles calculation and Boltzmann transport theory, we study the thermoelectric properties of Si2BNadsorbing halogen atoms (Si2BN-4X, X = F, Cl, Br, and I). The results show that the adsorption of halogen atoms cansignificantly regulate the energy band structure and lattice thermal conductivity of Si2BN. Among them, Si2BN-4I has thebest thermoelectric performance, the figure of merit can reach 0.50 K at 300 K, which is about 16 times greater than that ofSi2BN. This is because the adsorption of iodine atoms not only significantly increases the Seebeck coefficient due to banddegeneracy, but also rapidly reduces the phonon thermal conductivity by enhancing phonon scattering. Our work proves theapplication potential of Si2BN-based crystals in the field of thermoelectricity and the effective method for metal crystals toopen bandgaps by adsorbing halogens.

关键词： density functional theory thermoelectric effects transport properties electronic structure

来源：评论

学校读者我要写书评

暂无评论

A strategy for fabricating high-strength polyimide/carbon nanotube composite aerogels with efficient electromagnetic interference shielding efficacy in the X-band using nanofiber reinforcement

引用

Surfaces and interfaces 2025年

作者： Dong Zhao Guangtao Qian Ke Xu Shimin Wang Youhai Yu Dandan Li Chunhai Chen State Key Laboratory of Advanced Fiber Materials College of Materials Science and Engineering Donghua University Shanghai 201620 China Collaborative Innovation Center for Civil Aviation Composites Donghua University 2999 North Renmin Road Shanghai 201620 China

In the aerospace field, the intricate working conditions impose stringent requirements on the application of electromagnetic interference (EMI) shielding materials. Such materials not only need to fulfill the EMI shielding performance criteria but also must possess the capability to endure high temperature and exhibit favorable mechanical property. In the present study, anisotropic composite aerogels were fabricated through directional freezing and thermal imidization, with polyimide (PI) serving as the foundational matrix, polyimide nanofibers (PINF) functioning as reinforcements and incorporating multi-walled carbon nanotubes (MWCNTs). These composite aerogels demonstrated remarkable thermal stability, with the weight loss of 5% up to 565°C, along with excellent flame retardancy. The incorporation of PINF served to interconnect the internal structure of the aerogels, enhancing the mechanical property, as evidenced by an elastic modulus reaching up to 275 KPa. Furthermore, the EMI shielding performance of anisotropic composite aerogels was also systematically analyzed. The average shielding effectiveness (SE T ) of the 9-mm-thick aerogel (PPC-1) within the X-band attained 79.7 dB in the vertical direction and 61.2 dB in the horizontal direction, signifying excellent EMI resistance. These composite aerogels hold great promise for application in the demanding aerospace industry characterized by complex environments. Overall, this study provides a novel approach for preparing composite aerogels possessing lightweight, high-strength and high-efficiency EMI shielding performance, thereby making a valuable contribution to the relevant research field.

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：