检索结果-内蒙古大学图书馆

S‐Scheme 2D/2D Bi_(2)MoO_(6)/BiOI van der Waals heterojunction for CO_(2) photoreduction

Chinese Journal of Catalysis 2022年第7期43卷 1657-1666页

作者： Zhongliao Wang Bei Cheng Liuyang Zhang Jiaguo Yu Youji Li S.Wageh Ahmed A.Al‐Ghamdi State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina Laboratory of Solar Fuel Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan 430074HubeiChina College of chemistry and chemical engineering Jishou UniversityJishou 416000HunanChina Department of Physics Faculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia

Reducing CO_(2) to hydrocarbon fuels by solar irradiation provides a feasible channel for mitigating excessive CO_(2) emissions and addressing resource ***,severe charge recombi‐nation and the high energy barrier for CO_(2) photoreduction on the surface of photocatalysts com‐promise the catalytic ***,a 2D/2D Bi_(2)MoO_(6)/BiOI composite was fabricated to achieve improved CO_(2) photoreduction *** transfer in the composite was facilitated by the van der Waals heterojunction with a large‐area *** function calculation demon‐strated that S‐scheme charge transfer is operative in the composite,and effective charge separation and strong redox capability were revealed by time‐resolved photoluminescence and electron para‐magnetic resonance ***,the intermediates of CO_(2) photoreduction were identi‐fied based on the in situ diffuse reflectance infrared Fourier‐transform *** functional theory calculations showed that CO_(2) hydrogenation is the rate‐determining step for yielding CH_(4) and *** Bi_(2)MoO_(6) into the composite further decreased the energy barrier for CO_(2) photoreduction on BiOI by 0.35 *** study verifies the synergistic effect of the S‐scheme heterojunction and van der Waals heterojunction in the 2D/2D composite.

关键词： 2D/2D S‐scheme heterojunction van der Waals heterojunction CO_(2)photoreduction

来源：评论

学校读者我要写书评

暂无评论

Strongly Enhancing the Energy Storage Properties and Stability of Amorphous BaTiO3 Thin Films via Ions Doping

SSRN

引用

SSRN 2024年

作者： Chang, Ruiling Yao, Zhonghua Xing, Yutong Wang, Jun Hao, Hua Cao, Minghe Liu, Hanxing State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Material Science and Engineering Wuhan University of Technology Wuhan430070 China International School of Material Science and Engineering Wuhan University of Technology Wuhan430070 China Sanya Science and Education Innovation Park of Wuhan University of Technology Sanya572000 China

Amorphous thin films with high power density and breakdown strength satisfy the needs of advanced power electronic systems. Nonetheless, improving the energy storage density of amorphous films is critical for addressing the growing demand for electricity. We apply high spontaneous polarization BaTiO3 as the main component to make (1-x)Ba(Ti0.99Mn0.02)O3-xBiFeO3((1-x)BTM-xBF) thin films. Doping BiFeO3 (BF) synergistically boosts polarization. The introduction of amorphous phases and Mn ions enhances the breakdown strength. The results demonstrate that, at x=0.10, the film can achieve both a high efficiency of 80.3% and an excellent energy storage density of 111.3 J cm-3. Moreover, the film has a strong thermal stability within a broad range of 20°C ~ 160°C, as well as the cycling reliability is as high as 105 times. The present study offers a practical approach to develop film capacitors with outstanding energy storage capabilities. © 2024, The Authors. All rights reserved.

关键词： Amorphous films

来源：评论

学校读者我要写书评

暂无评论

5H-Fluoreno [3,2-b:6,7-b’] Dithiophene Based Non-fullerene Small Molecular Acceptors for Polymer Solar Cell Application

引用

Journal of Wuhan University of technology(materials Science) 2019年第5期34卷 1220-1227页

作者： WU Jiansheng XIAO Shengqiang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

Two novel non-fullerene small molecule acceptors were prepared with the conjugated backbone of 5 H-fluoreno[3, 2-b:6, 7-b’] dithiophene carrying the electron deficient unit of dicyanomethylene indanone(DICTFDT) and rhodanine(TFDTBR), respectively. The two acceptors exhibited excellent thermal stability and strong absorption in the visible region. The LUMO level is estimated to be at-3.89 eV for DICTFDT and-3.77 eV for TFDTBR. When utilized as the acceptor in bulk heterojunction polymer solar cells with the polymer donor of PBT7-Th, the optimized maximum power conversion efficiency of 5.12% and 3.95% was obtained for the device with DICTFDT and TFDTBR, respectively. The research demonstrates that 5 H-fluoreno[3, 2-b:6, 7-b’] dithiophene can be an appealing candidate for constructing small molecular electron acceptor towards efficient polymer:non-fullerene bulk heterojunction solar cells.

关键词： polymer solar cells bulk heterojunction non-fullerene acceptor

来源：评论

学校读者我要写书评

暂无评论

Domain Evolution, Dielectric and Piezoelectric Response in Bent Freestanding PbTiO3 Ferroelectric Nanowires

SSRN

引用

SSRN 2024年

作者： Zhou, Meng-Jun Peng, Kun Tan, Yueze Yang, Tiannan Chen, Long-Qing Nan, Ce-Wen State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and Devices School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China Department of Materials Science and Engineering Materials Research Institute The Pennsylvania State University University ParkPA16802 United States School of Mechanical Engineering Shanghai Jiao Tong University Shanghai200240 China School of Materials Science and Engineering State Key Lab of New Ceramics and Fine Processing Tsinghua University Beijing100084 China

Ferroelectric oxides with excellent flexibility are of significant practical and theoretical interests in recent studies. With most up-to-date research efforts, the effect of large bending on properties of nano-scale ferroelectric materials is still to be investigated. In this work, we elucidate the effect of bending angle on ferroelectric domain structures and material properties of bending PbTiO3 nanowires using phase-field simulations and thermodynamic modeling. We find non-monotonic dependencies of the coercive fields, dielectric responses and piezoelectric properties on the bending angle. A maximum enhancement of 462% and 226% in the dielectric constant and piezoelectric coefficient, respectively, is achieved at an 18° bending angle for the PbTiO3 nanowire with a radius of R = 10 nm and length L=100 nm, which is attributed to the formation of strong-response zones within the nanowire as illustrated by both the phase-field and thermodynamic analysis. The current work provides useful theoretical insights for the experimental explorations into ferroelectric functionalities of nanomaterials and potential applications of high-performance flexible ferroelectric-based nanodevices. © 2024, The Authors. All rights reserved.

关键词： Piezoelectricity

来源：评论

学校读者我要写书评

暂无评论

Achieving Enhanced Strength Retention in Ultrafine-Fibrous Interconnected Al-Based Ternary Eutectic Alloy at Elevated Temperatures

SSRN

引用

SSRN 2023年

作者： Gan, Zhanghua Li, Yingyu Zhang, Penghui Wu, Chuandong Shen, Shuai Huang, Yuanyuan Zhong, Songqiang Yang, Tian Luo, Guoqiang Liu, Jing State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology Hubei Wuhan430081 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory Chaozhou521000 China College of Materials Science and Engineering Shenzhen University Shenzhen518000 China

Certain two-phase regions with coarse structure could be usually detected concurrently along with three-phase eutectics in ternary eutectic alloy, leading to the formation of heterogeneous structure with limited ductility. In this study, Al-Ce-Ni eutectic alloy was chosen as modal system, which was firstly reported to be solidified under super-gravity field with high volume fraction of three-phase eutectics. Meanwhile, the formation of ultrafine-fibrous interconnected Al11Ce3-Al3Ni eutectic clusters with more "chains" and higher spatial connectivity was detected mainly due to the relatively higher nucleation rate. The high volume fraction and refinement of interconnected Al11Ce3-Al3Ni eutectic clusters with excellent thermal stability could contribute to enhancement of ductility and tensile strength at elevated-temperature. Interestingly, the strength retention at 300 oC and 400 oC were able to reach up to ~68.1 % and ~33.2 %, respectively. © 2023, The Authors. All rights reserved.

关键词： Solidification

来源：评论

学校读者我要写书评

暂无评论

Enhanced the Impact Resistance by Gradient Face-Sheet Design of a Sandwich Structure

SSRN

引用

SSRN 2023年

作者： Wei, Jing Luo, Guoqiang Liu, Ao Wei, Qinqin Xia, Zhilin Zhang, Ruizhi Shen, Qiang State Key Lab of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China National Key Laboratory of Shock Wave and Detonation Physics Institute of Fluid Physics China Academy of Engineering Physics Mianyang621900 China

Sandwich structure has been designed to reduce the impact damage of the stress waves. However, the existing work focuses on the optimization of sandwich cores while the important face-sheet structure is seldom improved. Here, we used the impedance matching theory to design a negative gradient face-sheet sandwich structure with excellent stress wave attenuation performance. Owing to stress wave attenuation form a high impedance to a low one, the negative gradient face-sheet sandwich structure shows a low peak stress of 5.51 MPa, and the average transmission peak stress is 2.69 MPa. The gradient face-sheet structure changes the compressive deformation behavior;thus, the energy absorption performance of the negative gradient face-sheet sandwich structure increases to be 1311.8 KJ/m3 and the specific energy absorption reaches 1072 J/kg. Finite-element methods further demonstrate the overall sandwich structures can be enhanced through alleviating the failure of sandwich core by a gradient face-sheet structure. This work provides a paradigm for the design of sandwich structures with high energy absorption performance. © 2023, The Authors. All rights reserved.

关键词： Energy absorption

来源：评论

学校读者我要写书评

暂无评论

Off-centering effect and crystal symmetry modification lead to high thermoelectric performance in diamondoid Cu_(2)SnSe_(3)

引用

National Science Open 2025年第3期4卷 35-52页

作者： Pengpeng Chen Shulin Bai Yi Wen Yichen Li Zihao Zhao Dezheng Gao Houdong Huang Yixuan Hu Tian Gao Lei Wang Shaoping Zhan Xiang Gao Xianli Su Hongyao Xie Li-Dong Zhao School of Materials Science and Engineering Beihang UniversityBeijing 100191China Center for Bioinspired Science and Technology Hangzhou International Innovation InstituteBeihang UniversityHangzhou 311115China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Center for High Pressure Science and Technology Advanced Research(HPSTAR) Beijing 100094China

Recently,dimensionless figure of merit(ZT)beyond 1.0 has been demonstrated in diamondoid Cu_(2)SnSe_(3),positioning it as a low-cost and ecofriendly thermoelectric alternative,and sparking intense interest in further optimizing its thermoelectric ***,its intrinsic monoclinic structure and the compact packing of tetrahedral coordination lead to a light valence band and high thermal conductivity,which impede further performance improvement in Cu_(2)SnSe_(3).Thus,developing effective approaches to altering the local structure of Cu_(2)SnSe_(3)is important for further optimizing its thermoelectric ***,we identified and thoroughly investigated the atomic off-centering behavior in Cu_(2)SnSe_(3),and demonstrated the electronic and phonon transport properties of Cu_(2)SnSe_(3)can be significantly enhanced by carefully modifying its monoclinic lattice into a distorted zinc-blende cubic structure via introducing Cd and off-centering Ag *** structure transition leads to band convergence and a reduction in the deformation potential of the material,resulting in a 7-fold enhancement in the density-of-state effective mass and an 85%increase in carrier ***,the off-centering effect results in strong acoustic-optical phonon scattering and an ultra-low lattice thermal conductivity of 0.3 W m^(-1)K^(-1).Consequently,a maximum ZT of 1.3 was obtained at 800 K for the Cu_(1.85)Ag_(0.15)Sn_(0.9)Cd_(0.1)Se_(3).

关键词： thermoelectric crystal structure transition off-centering behavior local symmetry breaking

来源：评论

学校读者我要写书评

暂无评论

Comprehensive Performance Evaluation of Air-Assisted Atomization Humidification for High-Power Fuel Cell Systems

SSRN

引用

SSRN 2024年

作者： Huang, Yiyuan Luo, Maji Jiang, Kun Wang, Chuan Tu, Faping Huang, Miaohua School of Automotive Engineering Wuhan University of Technology Wuhan430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Luoshi Road 122# Wuhan430070 China Wuhan HydraV Fuel Cell Tech Co. Ltd. Hubei 430090 China

Membrane humidification is the most prevalent method used to humidify the fuel cell system of commercial vehicles. However, this passive approach meets only the humidity requirements. In order to simultaneously address the issues of humidification and cooling associated with high-power fuel cell systems，air-assisted atomization humidification (AAAH) is proposed as an active technology. However, there are not enough experiments to analyze the adaptation of AAAH. In this study, the sensitivity of AAAH is evaluated under high-power load conditions and then compared with that of membrane humidification (MH) under various operating scenarios. Experimental results show a positive correlation between the relative humidity of inlet air and the pressure of spray with AAAH. Moreover, this technology achieves higher relative humidity of inlet air and water recovery rate than those obtained by MH, enhancing the stack performance and system efficiency and reducing system thermal load. At the rated current of 540A, the system efficiency can reach up to 44.8%, reducing the thermal load ratio to 87.4%. Although the humidity fluctuates in the range of 26.3% to 53.2% under variable load conditions, with a response time of 41 seconds, which is longer than that of MH, the fluctuations are within an acceptable limit considering the stack performance. Finally, a control strategy based on the proportion of liquid water is applied to satisfy the self-circulation of humidified water. © 2024, The Authors. All rights reserved.

关键词： Thermal load

来源：评论

学校读者我要写书评

暂无评论

Amino-Functionalized and Na+ Pre-Intercalated Three Dimensional Ti3c2tx Film Aerogel with Excellent Electrochemical Performances for Supercapacitor

SSRN

引用

SSRN 2024年

作者： Guo, Xiaohui Jin, Xinhui Mo, Dejie Feng, Lirong Wang, Dong Su, Baolian Key Lab of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education The College of Chemistry and Materials Science Northwest University Xi’an710069 China Department of inorganic chemistry University of Namur 61 rue de Bruxelles NamurB-5000 Belgium Xinjiang University China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing China

Precise modulation of the pore structure and modification of the surface groups (-NH2) of MXene aerogels by the solid foaming method in combination with Na+ pre-intercalation can significantly increase the layer spacing and change the electronic structure of MXene, thereby significantly optimizing its electrochemical performance. The three dimensional (3D) network structure provides numerous active sites on the surface of MXene and provides more ion transfer pathways, and the large layer spacing allows electrolyte ions fast transport, and the surface groups provide more active sites for the pseudocapacitive reaction. As a result, the prepared Na-Ti3C2Tx film aerogel delivers a high mass specific capacity of 560 F g-1 and excellent cycling performance of 94.5% capacity retention after 12,000 cycles in 0.5 M H2SO4. In addition, the flexible all-solid-state supercapacitor (ASC) composed of MXene film electrodes has excellent specific capacitance ~ 277 F g-1 and high energy density ~ 52.8 Wh kg-1 at 1600 W kg-1. Therefore, this work not only proposes a feasible synthetic method that can precisely regulate the pore structure and surface features of film aerogels, but also demonstrates the broad application prospects of aerogel materials in wearable power devices. © 2024, The Authors. All rights reserved.

关键词： Supercapacitor

来源：评论

学校读者我要写书评

暂无评论

Intraparticle ripening to create hierarchically porous Ti-MOF single crystals for deep oxidative desulfurization

引用

Dalton transactions (Cambridge, England : 2003) 2023年第35期52卷 12244-12252页

作者： Shen Yu Zhan Liu Jia-Min Lyu Chun-Mu Guo Yi-Long Wang Zhi-Yi Hu Yu Li Ming-Hui Sun Li-Hua Chen Bao-Lian Su Laboratory of Living Materials at the State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Wuhan 430070 Hubei China. chenlihua@***. Nanostructure Research Center Wuhan University of Technology Wuhan 430070 Hubei China. School of Chemistry Chemical Engineering and Life Science Wuhan University of Technology Wuhan 430070 Hubei China. Laboratory of Inorganic Materials Chemistry University of Namur 61 rue de Bruxelles B-5000 Namur Belgium.

The catalytic oxidative desulfurization (ODS) technique is able to remove sulfur compounds from fuels, conducive to achieving deep desulfurization for the good of the ecological environment. Ti-based metal-organic frameworks (Ti-MOFs) possessing good affinity to organic reactants and considerable numbers of Ti active sites are promising catalysts for ODS. However, current Ti-MOFs suffer from severe diffusion limitations caused by the size mismatch between sole micropores and bulky sulfur compounds, leading to poor ODS performance. Here, a facile method of intraparticle ripening without any additive is developed to obtain hierarchically meso-microporous Ti-MIL-125 single crystals (Meso-Ti-MIL-125) for the first time. Such Meso-Ti-MIL-125 shows a BET surface area of 1401 m g and a mesoporous volume that is 1.7 times as high as that of the conventional Ti-MIL-125. Our novel Meso-Ti-MIL-125 exhibits excellent catalytic performance in the ODS of a series of bulky thiophenic sulfur compounds, completely removing benzothiophene (BT), dibenzothiophene (DBT), and 4,6-dimethyldibenzothiophene (DMDBT) from model fuels, which is, respectively, 2.4 times, 1.5 times, and 6.7 times higher than the removal achieved with conventional Ti-MIL-125. Such a facile synthetic strategy is envisioned to be applied in many kinds of crystalline materials, such as zeolites, for industrial production.

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：