检索结果-内蒙古大学图书馆

Thermal Enhancement of Luminescence for Negative Thermal Expansion in molecular materials

Journal of the American chemical Society 2022年第30期144卷 13688-13695页

作者： Liang Chen Xin Chen Rui Ma Kun Lin Qiang Li Jian-Ping Lang Chunyu Liu Kenichi Kato Ling Huang Xianran Xing Beijing Advanced Innovation Center for Materials Genome Engineering Institute of Solid State Chemistry University of Science and Technology Beijing Beijing 100083 China. College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou Jiangsu 215123 China. Department of Chemistry Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education Tsinghua University Beijing 100084 China. RIKEN SPring-8 Center Sayo-gun Hyogo 679-5148 Japan. Institute of Advanced Materials Nanjing Tech University Nanjing 211816 China.

Overcoming thermal quenching is an essential issue in the practical application of luminescent materials. Herein, we found that negative thermal expansion (NTE) can achieve the thermal enhancement of luminescence in molecular materials based on three metal-organic frameworks CuX-bpy (X = Cl, Br, I; bpy = 4,4'-bipyridine). All complexes exhibit NTE on the -axis, and the strongest NTE leads to a contraction of the Cu...Cu distance in CuCl-bpy, which further intensifies the luminescence emission. This phenomenon indicates the existence of thermally enhanced charge transfer. Moreover, the origin of the distinction in charge transfer attributed to the different valence states of the copper is investigated through the combined studies of X-ray photoelectron spectroscopy, X-ray absorption near-edge structure, and density functional theory calculations. This research provides a new approach to modulating the luminescence thermal enhancement by NTE.

关键词： Charge transfer Copper Ligands Luminescence Thermal expansion

来源：评论

学校读者我要写书评

暂无评论

Random Ternary Copolymers with Adjustable Monomer Ratios Enable Efficient Fluorescence Imaging and Phototherapy in the Near-Infrared Ii Window

SSRN

引用

SSRN 2025年

作者： Dong, Xiyuan Su, Deliang Qi, Qiang Gong, Yi Dai, Jun Wang, Hongdi Zhao, Zujin Liu, Rong Zhou, Jian Department of Obstetrics and Gynecology Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan430034 China College of Material Chemistry and Chemical Engineering Hangzhou Normal University Hangzhou310036 China State Key Laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates South China University of Technology Guangzhou510640 China

The utilization of Near Infrared (NIR) laser-excited phototheranostic agents has demonstrated potential for enhancing phototherapy for deep-seated tumors. However, many NIR phototheranostic agents have exhibited weak photoluminescence intensity, making it challenging to obtain clear NIR fluorescence imaging. To address this issue, a series of ternary copolymers containing triphenylamine, carbazole, and benzobisthiadiazole on the mainchain are synthesized. The main focus is to evaluate the influence of varying proportions of structural units along the conjugated backbone and various triphenylamine derivatives on the photophysical properties of the copolymers, as well as their ability to generate reactive oxygen species (ROS) and their photothermal performance under NIR laser irradiation. PTCBT-CN253, recognized for its exceptional performance, notably its high quantum yield (QY) of 4.97% in the NIR-II window, is encapsulated with DSPE-PEG2000 to produce PTCBT-CN253 NPs, which exhibits excellent biocompatibility. Upon NIR laser irradiation, 4T1 cancer cells co-incubated with PTCBT-CN253 NPs display increased ROS generation and release substantial heat, resulting in in vitro eradication of 4T1 cells. Upon intravenous administration into 4T1 tumor-bearing mice, PTCBT-CN253 NPs can accumulate at the tumor site, enabling tumor visualization through NIR-II fluorescence imaging. The growth of 4T1 tumor-bearing mice treated with PTCBT-CN253 NPs and NIR laser irradiation is significantly inhibited. © 2025, The Authors. All rights reserved.

关键词： Fluorescence imaging

来源：评论

学校读者我要写书评

暂无评论

Carbon materials for electrochemical energy storage and conversion

Sustainable Chemistry for Energy Materials

引用

Sustainable Chemistry for Energy materials 2025年 1卷

作者： Qi Yang Qiulong Wei Yongjin Fang State Key Laboratory of Chemical Resource Engineering College of Chemical Engineering Beijing University of Chemical Technology Beijing 100029 China Department of Materials Science and Engineering College of Materials Xiamen University Xiamen 361005 China College of Chemistry and Molecular Sciences Wuhan University Wuhan 430072 China

来源：评论

学校读者我要写书评

暂无评论

Multi-Functionally Ferroelectric Polymer Promotes Highly-Efficient Large-Area Organic Solar Cells with Excellent Comprehensive Performance

SSRN

引用

SSRN 2023年

作者： Deng, Jiawei Liu, Jiabin Li, Wenhao Geng, Xiaokang Xie, Jiaping Jeong, Sang Young Huang, Bin Zhou, Dan Wu, Feiyan Woo, Han Young Chen, Lie Nanchang University Nanchang330031 China Department of Materials Science Fudan University Songhu Road Shanghai200438 China School of Metallurgical and Chemical Engineering Jiangxi University of Science and Technology 156 Ke Jia Road Ganzhou341000 China School of Materials Science and Engineering Tianjin Key Laboratory of Molecular Optoelectronic Science Tianjin University Tianjin300072 China Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong University Nanchang330063 China Department of Chemistry College of Science Korea University 145 Anam-ro Seongbuk-gu Seoul02841 Korea Republic of

Developing high-performance active layer with excellent comprehensive performance is very crucial for the commercialization of organic solar cells (OSCs). Here, we demonstrate the multi-function of ferroelectric polymer polyvinylidene fluoride (PVDF) in improving the device comprehensive performance including device efficiency, stability, green-solvent large-area printing and mechanical property. Addition of PVDF not only enhances the build-in field to promote charge kinetics, but also develops robust network through strong interaction and chain entanglement between polymer donor and PVDF. Importantly, such robust network effectively protects the active layer from excessive flushing/swelling between D/A component to optimize layer-by-layer (LBL) deposition, induce a favorable vertical phase distribution and prolong the film-forming process, consequently facilitating green-solvent blade-coating printing, improving device efficiency and stability, and enhancing device mechanical flexibility. Due to the multiple advantages of PVDF, the PM6/BTP-eC9 obtains an excellent efficiency of 18.35% for BTP-eC9-based LBL devices. By blade-coating printing with green solvent, one of the highest efficiencies of 16.40% is achieved for large-area (1.21 cm2) binary device. Particularly, toughness is used to comprehensively evaluate mechanical property of OSCs, showing significant improvement with simultaneously enhanced fracture strength and tensile strain, and enabling small molecule-based system even have comparable mechanical flexibility and comprehensive performance to the all-polymer system. © 2023, The Authors. All rights reserved.

关键词： Tensile strain

来源：评论

学校读者我要写书评

暂无评论

Expansion cooling prospects for large scale applications

引用

International Journal of Thermofluids 2023年 20卷

作者： Alami, Abdul Hai Alrashid, Rashid Mdallal, Ayman Yasin, Ahmad Ayoub, Mohamad Alasad, Shamma Aljaghoub, Haya Alashkar, Adnan Abdelkareem, Mohammad Ali Olabi, Abdul Ghani Orhan, Mehmet Department of Sustainable and Renewable Energy Engineering University of Sharjah P.O. Box 27272 Sharjah United Arab Emirates Sustainable Energy and Power Systems Research Centre RISE University of Sharjah P.O. Box 27272 Sharjah United Arab Emirates Department of Mechanical Engineering American University of Sharjah P.O. Box 26666 Sharjah United Arab Emirates Department of Mechatronics Engineering American University of Sharjah P.O. Box 26666 Sharjah United Arab Emirates Department of Industrial Engineering and Engineering Management University of Sharjah P.O. Box 27272 Sharjah United Arab Emirates Materials Science and Engineering PhD Program American University of Sharjah P.O. Box 26666 Sharjah United Arab Emirates Chemical Engineering Department Minia University Elminia Egypt Mechanical Engineering and Design School of Engineering and Applied Science Aston University Aston Triangle BirminghamB4 7ET United Kingdom

Air conditioning in general and cooling in particular are the biggest energy sinks among all electricity consumers. Mitigating energy needs of this sector by active or passive means is a necessity. This paper offers a comprehensive review of various cooling technologies for large scale applications and compares them in terms of economy, environmental footprint and most importantly, energy requirements. There is a main focus on the potential of using expansion cooling, which is defined in conjunction with cooling effects generated during the expansion process of a gas. The interest in such cooling technology stems from the double benefit of utilizing a large-scale compressed air energy storage (CAES) system that can also provide cooling via the expansion of air. This consequently manifests in reducing the electrical demand required for cooling applications. Such a concept is beneficial for hot climates, where most of the electrical demand is reserved for offsetting the cooling load. © 2023 The Author(s)

关键词： Compressed air energy storage

来源：评论

学校读者我要写书评

暂无评论

NaV3O8/poly(3,4-ethylenedioxythiophene) composites as high-rate and long-lifespan cathode materials for reversible sodium storage

引用

Rare Metals 2020年第8期39卷 865-873页

作者： Guo-Chun Ding Li-Min Zhu Qi Yang Ling-Ling Xie Xiao-Yu Cao Yu-Ling Wang Jian-Ping Liu Xin-Li Yang School of Chemistry and Chemical Engineering Key Laboratory of High Specific Energy Materials for Electrochemical Power Sources of Zhengzhou CityHenan University of TechnologyZhengzhou 450001China School of Environmental Engineering Key Laboratory of High Specific Energy Materials for Electrochemical Power Sources of Zhengzhou CityHenan University of TechnologyZhengzhou 450001China Department of Molecular Sciences Australian Research Council Centre of Excellence for Nanoscale BioPhotonicsFaculty of Science and EngineeringMacquarie UniversitySydneyNSW 2109Australia

Sodium-ion batteries have received a surge of interests for the alternatives to lithium-ion batteries due to their abundant reserves and low *** quest of reliable and high-performance cathode materials is crucial to future Na storage ***,poly(3,4-ethylenedioxythiophene)(PEDOT)was successfully introduced to NaV3O8 via in situ oxidation polymerization,which can effectively enhance electron conductivity and ionic diffusion of NaV3O8 *** a result,these NaV3O8@-PEDOT composites exhibit a significantly improved electrochemical performance including cycle stability and rate *** particular,NaV3O8@20 wt%PEDOT composite demonstrates better dispersibility and lower charge transfer resistance compared with bare NaV3O8,which delivers the first discharge capacity of 142 mAh-g-1and holds about 128.7 mAh·g-1 after 300 cycles at a current density of 120 mA·*** at a high current density of 300 mA·g-1,a high reversible capacity of 99.6 mAh·g-1 is *** these consequences suggest that NaV3O8@20 wt%PEDOT composite may be a promising candidate to serve as a high-rate and long-lifespan cathode material for sodium-ion batteries.

关键词： Sodium-ion batteries NaV3O8@PEDOT cathode composites In situ oxidation polymerization High-rate Long-lifespan

来源：评论

学校读者我要写书评

暂无评论

Progress in membrane distillation processes for dye wastewater treatment: A review

引用

Chemosphere 2024年 360卷 142347页

作者： Nthunya, Lebea N. Chong, Kok Chung Lai, Soon Onn Lau, Woei Jye López-Maldonado, Eduardo Alberto Camacho, Lucy Mar Shirazi, Mohammad Mahdi A. Ali, Aamer Mamba, Bhekie B. Osial, Magdalena Pietrzyk-Thel, Paulina Pregowska, Agnieszka Mahlangu, Oranso T. Molecular Sciences Institute School of Chemistry University of the Witwatersrand Private Bag X3 Johannesburg2050 South Africa Department of Chemical Engineering Lee Kong Chian Faculty of Engineering and Science Universiti Tunku Abdul Rahman Jalan Sungai Long Selangor Kajang43000 Malaysia Centre of Photonics and Advanced Materials Research Universiti Tunku Abdul Rahman Perak Kampar31900 Malaysia Faculty of Chemical and Energy Engineering Universiti Teknologi Malaysia Johor Johor Bahru81310 Malaysia Faculty of Chemical Sciences and Engineering Autonomous University of Baja California B.C. Tijuana22424 Mexico Department of Environmental Engineering Texas A&M University-Kingsville MSC 2013 700 University Blvd. KingsvilleTX78363 United States Centre for Membrane Technology Department of Chemistry and Bioscience Aalborg University Fredrik Bajers Vej 7H Aalborg9220 Denmark Institute for Nanotechnology and Water Sustainability College of Science Engineering and Technology University of South Africa Florida Science Campus Roodepoort1709 South Africa Institute of Fundamental Technological Research Polish Academy of Sciences Pawińskiego 5B Warsaw02-106 Poland

Textile and cosmetic industries generate large amounts of dye effluents requiring treatment before discharge. This wastewater contains high levels of reactive dyes, low to none-biodegradable materials and chemical residues. Technically, dye wastewater is characterised by high chemical and biological oxygen demand. Biological, physical and pressure-driven membrane processes have been extensively used in textile wastewater treatment plants. However, these technologies are characterised by process complexity and are often costly. Also, process efficiency is not achieved in cost-effective biochemical and physical treatment processes. Membrane distillation (MD) emerged as a promising technology harnessing challenges faced by pressure-driven membrane processes. To ensure high cost-effectiveness, the MD can be operated by solar energy or low-grade waste heat. Herein, the MD purification of dye wastewater is comprehensively and yet concisely discussed. This involved research advancement in MD processes towards removal of dyes from industrial effluents. Also, challenges faced by this process with a specific focus on fouling are reviewed. Current literature mainly tested MD setups in the laboratory scale suggesting a deep need of further optimization of membrane and module designs in near future, especially for textile wastewater treatment. There is a need to deliver customized high-porosity hydrophobic membrane design with the appropriate thickness and module configuration to reduce concentration and temperature polarization (CP and TP). Also, energy loss should be minimized while increasing dye rejection and permeate flux. Although laboratory experiments remain pivotal in optimizing the MD process for treating dye wastewater, the nature of their time intensity poses a challenge. Given the multitude of parameters involved in MD process optimization, artificial intelligence (AI) methodologies present a promising avenue for assistance. Thus, AI-driven algorithms have the poten

关键词： Energy utilization

来源：评论

学校读者我要写书评

暂无评论

Controllable CO adsorption determines ethylene and methane productions from CO_(2) electroreduction

引用

science Bulletin 2021年第1期66卷 62-68,M0004页

作者： Haipeng Bai Tao Cheng Shangyu Li Zhenyu Zhou Hao Yang Jun Li Miao Xie Jinyu Ye Yujin Ji Youyong Li Zhiyou Zhou Shigang Sun Bo Zhang Huisheng Peng State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science and Laboratory of Advanced MaterialsFudan UniversityShanghai 200438China Institute of Functional Nano&Soft Materials(FUNSOM)and Jiangsu Key Laboratory for Carbon-Based Functional Materials&Devices Soochow UniversitySuzhou 215123China Institute of Chemical Sciences and Engineering École polytechnique fédérale de LausanneLausanne 1015Switzerland State Key Laboratory of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy MaterialsCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

Among all CO2 electroreduction products,methane(CH4)and ethylene(C_(2)H_(4))are two typical and valuable hydrocarbon products which are formed in two different pathways:hydrogenation and dimerization reactions of the same CO *** studies show that the adsorption configurations of CO intermediate determine the reaction pathways towards CH4/C_(2)H_(4).However,it is challenging to experimentally control the CO adsorption configurations at the catalyst surface,and thus the hydrocarbon selectivity is still ***,we seek to synthesize two well-defined copper nanocatalysts with controllable surface *** two model catalysts exhibit a high hydrocarbon selectivity toward either CH4(83%)or C_(2)H_(4)(93%)under identical reduction *** transmission electron microscopy and X-ray absorption spectroscopy characterizations reveal the low-coordination Cu^(0)sites and local Cu^(0)/Cu^(+)sites of the two catalysts,***-temperature programed desorption,in-situ attenuated total reflection Fourier transform infrared spectroscopy and density functional theory studies unveil that the bridge-adsorbed CO(CO_(B))on the low-coordination Cu^(0)sites is apt to be hydrogenated to CH4,whereas the bridge-adsorbed CO plus linear-adsorbed CO(CO_(B)+CO_(L))on the local Cu^(0)/Cu^(+)sites are apt to be coupled to C_(2)H_(4).Our findings pave a new way to design catalysts with controllable CO adsorption configurations for high hydrocarbon product selectivity.

关键词： CO2 electroreduction CO adsorption Hydrogenation Dimerization

来源：评论

学校读者我要写书评

暂无评论

Oxidizing Methanol at Cubic-Hexagonal Junction of Nio-Zno at Low Onset Potential

SSRN

引用

SSRN 2024年

作者： Khanam, Salma A. Sarmah, Kangkan Guha, Ankur Kanti Lee, Seonghwan Park, Young-Bin Saikia, Lakshi Saikia, Sayanika Saha, Rafikul Ali Bania, Kusum K. Department of Chemical Sciences Tezpur University Assam Tezpur784028 India Advanced Computational Chemistry Centre Cotton University Panbazar Assam Guwahati781001 India Department of Mechanical Engineering Ulsan National Institute of Science and Technology UNIST-gil 50 Ulju-gun Ulsan44919 Korea Republic of Materials Science Division CSIR-NEIST Assam 785006 India cMACS Department of Microbial and Molecular Systems KU Leuven Celestijnenlaan 200F Leuven3001 Belgium

A bimetallic, low-cost electrocatalyst consisting of non-noble nickel (Ni) and zinc (Zn) metal was synthesized for the effective oxidation of methanol (CH3OH). The formation of cubic NiO (nickel oxide) and hexagonal ZnO (zinc oxide) was confirmed by various spectrophotometric analyses. NiO-ZnO modified with -COOH functionalized MWCNT, NiO-ZnO-f-MWCNT exhibited significant methanol oxidation reaction (MOR) activity without any substantial oxygen evolution reaction (OER). At a lower onset potential value of 1.33 V versus RHE (reversible hydrogen electrode), the catalyst NiO-ZnO-f-MWCNT demonstrated a high current density of 3.88×103 Am-2 in 1M KOH and 1M CH3OH. The catalyst NiO-ZnO-f-MWCNT, with the lowest Tafel slope value compared to the other synthesized catalysts, was found to be stable without significantly losing current density, for about 500 cycles and 25000 s. The density functional theory (DFT) calculation unveiled that all the steps involved during the interaction of CH3OH and the catalyst surface for oxidation of CH3OH were exergonic indicating a thermodynamically feasible and favourable process of MOR. The electrocatalytic activity was found to be dependent on the concentration of both Ni and Zn. An increase in Ni concentration hampered the MOR by favouring the OER. © 2024, The Authors. All rights reserved.

关键词： Density functional theory

来源：评论

学校读者我要写书评

暂无评论

A Novel Method for the Fabrication of Antibacterial Stainless Steel with Uniform Silver Dispersions by Silver Nanoparticle/Polyethyleneimine Composites

引用

materials 2023年第10期16卷 3719页

作者： Chih, Yu-Kun You, Jhu-Lin Lin, Wei-Hsuan Chang, Yen-Hao Tseng, Chun-Chieh Ger, Ming-Der Graduate School of Defense Science Chung Cheng Institute of Technology National Defense University Taoyuan335 Taiwan Department of Chemical and Materials Engineering Chung Cheng Institute of Technology National Defense University Taoyuan335 Taiwan System Engineering and Technology Program National Chiao Tung University Hsinchu300 Taiwan Combination Medical Device Technology Division Medical Devices and Opto-Electronics Equipment Department Metal Industries Research & Development Centre Kaohsiung821 Taiwan

Only a few studies have so far focused on the addition of silver to SS316L alloys by conventional sintering methods. Unfortunately, the metallurgical process of silver-containing antimicrobial SS is greatly limited due to the extremely low solubility of silver in iron and its tendency to precipitate at the grain boundaries, resulting in an inhomogeneous distribution of the antimicrobial phase and loss of antimicrobial properties. In this work, we present a novel approach to fabricate antibacterial stainless steel 316L by functional polyethyleneimine-glutaraldehyde copolymer (PEI-co-GA/Ag catalyst) composites. PEI is a highly branched cationic polymer, which makes it exhibit very good adhesion on the surface of the substrate. Unlike the effect of the conventional silver mirror reaction, the introduction of functional polymers can effectively improve the adhesion and distribution of Ag particles on the surface of 316LSS. It can be seen from the SEM images that a large number of silver particles are retained and well dispersed in 316LSS after sintering. PEI-co-GA/Ag 316LSS exhibits excellent antimicrobial properties and does not release free silver ions to affect the surrounding environment. Furthermore, the probable mechanism for the influence of the functional composites on the enhancement of adhesion is also proposed. The formation of a large number of hydrogen bonds and van der Waals forces, as well as the negative zeta potential of the 316LSS surface, can effectively enable the formation of a tight attraction between the Cu layer and the surface of 316LSS. These results meet our expectations of designing passive antimicrobial properties on the contact surface of medical devices. © 2023 by the authors.

关键词： Silver nanoparticles

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：