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Heterogeneous network of 2D MOFs decorated 1D CNTs imparting multiple functionalities to composite phase change materials

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Nano Research Energy 2024年第3期3卷 17-27页

作者： Xuemei Diao Xiaowei Zhang Yang Li Xiao Chen Zhiyong Zhao Peng Wang Panpan Liu Hongyi Gao Ge Wang Institute of Advanced Materials Beijing Normal UniversityBeijing 100875China Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory of Function Materials for Molecule&Structure ConstructionSchool of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing100083China Shunde Innovation School University of Science and Technology BeijingShunde 528399China

Advanced multifunctional composite phase change materials(PCMs)for integrating energy storage,photothermal conversion and microwave absorption can promote the development of next-generation miniaturized electronic ***,we report paraffin wax(PW)-based multifunctional composite PCMs with a hierarchical network structure assembled by two‐dimensional(2D)nickel-based metal-organic frameworks(Ni-MOFs)decorated carbon nanotubes(CNTs).The PW/CNTs@Ni-MOF composite PCMs yield an excellent photothermal energy conversion efficiency of 93.2%,as well as a good phase change enthalpy of 126.5 J/g and prominent thermal ***,the composite PCMs also present great microwave absorption with-25.32 dB minimum reflection loss(RLmin)at 9.85 *** remarkable features of the composite PCMs lie in their hierarchical network architecture and the synergistic enhancement of CNTs and MOFs,giving rise to the increased surface area,accelerated photon capture and transmission,and enhanced dielectric loss caused by polarization effects and multiple reflections,thus further boosting the latent energy storage capacity,photothermal kinetics,and microwave reflection *** work provides a facile and scalable approach to regulating the multifunction of composite PCMs.

关键词： phase change material metal-organic framework carbon nanotube photothermal conversion thermal energy storage

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Polypyrrole-boosted photothermal energy storage in MOF-based phase change materials

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Interdisciplinary Materials 2023年第3期2卷 423-433页

作者： Panpan Liu Mengke Huang Xiao Chen Yan Gao Yang Li Cheng Dong Ge Wang Institute of Advanced Materials Beijing Normal UniversityBeijingChina College of Nuclear Science and Technology Beijing Normal UniversityBeijingChina Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory of Function Materials for Molecule&Structure ConstructionSchool of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijingChina School of Materials Science and Engineering Shandong University of TechnologyZiboChina

Infiltrating phase change materials(PCMs)into nanoporous metal–organicframeworks(MOFs)is accepted as a cutting-edge thermal energy ***,weak photon capture capability of pristine MOF-basedcomposite PCMs is a stumbling block in solar energy *** thisgoal,we prepared advanced high-performance pristine MOF-based photothermalcomposite PCMs by simultaneously integrating photon absorber guest(polypyrrole[PPy])and thermal storage guest(1-octadecanol[ODA])intoan MOF host(Cr-MIL-101-NH2).The coated PPy layer on the surface ofODA@MOF not only serves as a photon harvester,but also serves as a ***,ODA@MOF/PPy composite PCMs exhibit intense andbroadband light absorption characteristic in the ultraviolet–visible–nearinfraredregion,and higher heat transfer ability than ODA@***,the photothermal conversion and storage efficiency of ODA@MOF/PPy-6%is up to 88.3%.Additionally,our developed MOF-based photothermalcomposite PCMs also exhibit long-standing antileakage stability,energystorage stability,and photothermal conversion *** proposed coatingstrategy and in-depth understanding mechanism are expected to facilitate thedevelopment of high-efficiency MOF-based photothermal composite PCMs insolar energy utilization.

关键词： metal–organic frameworks phase change materials photon harvester photothermal conversion thermal energy storage

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Topological corner states in graphene by bulk and edge engineering

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Physical Review B 2022年第20期106卷 L201407-L201407页

作者： Junjie Zeng Chen Chen Yafei Ren Zheng Liu Wei Ren Zhenhua Qiao CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics and Department of Physics University of Science and Technology of China Hefei Anhui 230026 China Chongqing Key Laboratory for Strongly Coupled Physics and Institute for Structure and Function Department of Physics Chongqing University Chongqing 401331 China International Center for Quantum and Molecular Structures Materials Genome Institute Physics Department and Shanghai Key Laboratory of High Temperature Superconductors Shanghai University Shanghai 200444 China Department of Materials Science and Engineering University of Washington Seattle Washington 98195 USA ICQD Hefei National Laboratory for Physical Sciences at Microscale University of Science and Technology of China Hefei Anhui 230026 China

Two-dimensional higher-order topology is usually studied in (nearly) particle-hole symmetric models, so that an edge gap can be opened within the bulk one. But more often the edge anticrossing deviates even into the bulk, where corner states are difficult to pinpoint. We address this problem in a graphene-based Z2 topological insulator with spin-orbit coupling and in-plane magnetization both originating from substrates through a Slater-Koster multiorbital model. The gapless helical edge modes cross inside the bulk, where the magnetization-induced edge gap is also located. After demonstrating its second-order nontriviality in bulk topology by a series of evidence, we show that a difference in bulk-edge on-site energy can adiabatically tune the position of the crossing/anticrossing of the edge modes to be inside the bulk gap. This can help unambiguously identify two pairs of topological corner states with nonvanishing energy degeneracy for a rhombic flake. We further find that the obtuse-angle pair is more stable than the acute-angle one.

关键词： Edge states Spin-orbit coupling Topological phases of matter Graphene Topological insulators

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Neural network-inspired hybrid aerogel boosting solar thermal storage and microwave absorption

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Nano Research Energy 2024年第3期3卷 5-16页

作者： Yang Li Panpan Liu Peicheng Li Yuhao Feng Yan Gao Xuemei Diao Xiao Chen Ge Wang Institute of Advanced Materials Beijing Normal UniversityBeijing 100875China College of Nuclear Science and Technology Beijing Normal UniversityBeijing 100875China School of Environment Beijing Normal UniversityBeijing 100875China Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory of Function Materials for Molecule&Structure ConstructionSchool of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China

In response to the rapid development of highly integrated multifunctional electronic devices,developing advanced multifunctional composite phase change materials(PCMs)that integrate thermal management,solar-thermal conversion and microwave absorption has become increasingly ***,we propose a bionical strategy to design neural network-like(carbon nanofiber)CNF@Co/C aerogels by growing ZIF-67 in situ on bacterial cellulose(BC)and subsequent calcination *** the encapsulation of thermal storage unit(paraffin wax,PW),the obtained multifunctional composite PCMs(PW-CNF@Co/C aerogel)are composed of“soma”(Co/C polyhedra),“axon”(porous CNF)and thermal storage unit(PW).Importantly,the composite PCMs show a high solar-thermal conversion efficiency of 95.27%benefiting from the synergism of“soma”with strong local surface plasmon resonance(LSPR)effect and“axon”with enhanced photon transmission *** attractively,the composite PCMs also display good microwave absorption capacity with a minimum reflection loss(RL)of-26.8 dB at 10.91 GHz owing to the synergy of magnetic and dielectric components along with abundant polarization and multiple *** developed functionally integrated composite PCMs provide a prospective application of highly integrated and miniaturized electronic devices in complex and changeable outdoor environments.

关键词： phase change materials bionic design thermal energy storage solar-thermal conversion microwave absorption

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High-throughput calculation-based rational design of Fe-doped MoS_(2) nanosheets for electrocatalytic p H-universal overall water splitting

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Journal of Energy Chemistry 2024年第4期91卷 194-202页

作者： Guangtong Hai Xiangdong Xue Zhenyu Wu Canyang Zhang Xin Liu Xiubing Huang Institute of Zhejiang University-Quzhou Zhejiang UniversityQuzhou 324000ZhejiangChina Beijing Key Laboratory of Membrane Materials and Engineering Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory of Function Materials for Molecule&Structure ConstructionSchool of Materials Science and EngineeringUniversity of Science and TechnologyBeijing 100083China CentreÉnergie Matériaux et Télécommunications(EMT) Institut national de la recherche scientifique(INRS)Varennes J3X1P7QuébecCanada

Electrocatalytic water splitting is crucial for H2generation via hydrogen evolution reaction(HER)but subject to the sluggish dynamics of oxygen evolution reaction(OER).In this work,single Fe atomdoped MoS_(2)nanosheets(SFe-DMNs)were prepared based on the high-throughput density functional theory(DFT)calculation *** to the synergistic effect between Fe atom and MoS_(2)and optimized intermediate binding energy,the SFe-DMNs could deliver outstanding activity for both HER and *** assembled into a two-electrode electrolytic cell,the SFe-DMNs could achieve the current density of 50 mA cm^(-2)at a low cell voltage of 1.55 V under neutral *** results not only confirmed the effectiveness of high-throughput screening,but also revealed the excellent activity and thus the potential applications in fuel cells of SFe-DMNs.

关键词： High-throughput calculation Overall water splitting Single atom doped catalyst Molybdenum disulfide nanosheet

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Cobalt-embedded few-layered carbon nanosheets toward enhanced hydrogen evolution:Rational design and insight into structure-performance correlation

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Journal of Energy Chemistry 2021年第7期30卷 156-161页

作者： Liwen Xing Hongyi Gao Dandan Jia Xiao Chen Mengyi Han Junjun Lv Ang Li Ge Wang Xingtian Shu Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory of Function Materials for Molecule&Structure ConstructionSchool of Materials Science and EngineeringUniversity of Science and Technology Beijing30 Xueyuan RoadBeijing 100083China Research Institute of Petroleum Processing SINOPECBeijing 100083China Institute of Advanced Materials Beijing Normal UniversityBeijing 100875China School of Chemistry Biology and Materials Engineering Suzhou University of Science and TechnologySuzhou 215009JiangsuChina Shunde Graduate School University of Science and Technology BeijingFoshan 528399GuangdongChina

Over the past decades, the energy and concomitant environment issues, such as energy shortage, air pollution and global warming, have been becoming increasingly striking world-wide challenges [1,2]. Such a dilemma in ... 详细信息

关键词： Electrocatalyst Metal-organic frameworks Carbon nanosheets Hydrogen evolution reaction structure-performance correlation

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Electronic textiles for thermal and moisture management

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Science Bulletin 2024年第22期69卷 3467-3469页

作者： Yan Gao Yang Li Xiao Chen Ge Wang Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory of Function Materials for Molecule&Structure ConstructionSchool of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China School of Physics and Astronomy Beijing Normal UniversityBeijing 100875China

Wearable bioelectronics,capable of detecting and quantifying physiological data generated by human movement and activity,have garnered global research and commercial *** designs employing inflexible electrodes typically adhere to the skin or organs through tapes,clips,or comparable means,resulting in incongruent bodily contact and the generation of distorted or exceedingly noisy physical signals[1–5].Emerging flexible electronic textiles(e-textiles)integrating advanced digital components and electronic devices exhibit tremendous application potential in human motion detection,personal protection,human–machine interfaces,real-time and long-term ***,numerous flexible bioelectronics were fabricated by impermeable polymer films or gels,which hindered the gas or moisture exchange between human skin and surrounding *** contact causes sweat accumulation,leading to discomfort wearing experiences and signal ***,achieving simultaneous optimization of thermal and moisture comfort for individuals,while upholding electrical performance integrity,continues to pose a severe challenge.

关键词： moisture exceeding integrating

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Polydopamine-coated metal-organic framework-based composite phase change materials for photothermal conversion and storage

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Chinese Chemical Letters 2023年第8期34卷 343-347页

作者： Ang Li Mengke Huang Die Hu Zhaodi Tang Jianhang Xu Yang Li Xiaowei Zhang Xiao Chen Ge Wang School of Materials Science and Engineering Suzhou University of Science and TechnologySuzhou 215009China Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory of Function Materials for Molecule&Structure ConstructionSchool of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China Institute of Advanced Materials Beijing Normal UniversityBeijing 100875China Key Laboratory of Low-grade Energy Utilization Technologies and Systems(Chongqing University) Ministry of Education of ChinaChongqing UniversityChongqing 400044China Shunde Graduate School University of Science and Technology BeijingShunde 528399China

The liquid leakage and weak solar absorption capacity of organic phase change materials(PCMs)seriously hinder the efficient utilization of solar energy and thermal energy *** address these issues,we prepared nanoporous metal organic framework(Ni-MOF)for the vacuum infiltration of paraffin wax(PW),followed by the coating of solar-absorbing functional polydopamine(PDA)on the surface of PW@MOF for photothermal conversion and *** an efficient photon harvester,PDA coating endows PW@MOF/PDA composite PCMs with excellent photothermal conversion and storage properties due to the robust broadband solar absorption capability in the UV–vis ***,our prepared PW@MOF/PDA composite PCMs exhibit a high photothermal conversion and storage efficiency of 91.2%,while that of PW@MOF composite PCMs is only *** addition,PW@MOF/PDA composite PCMs also exhibit excellent thermal stability,shape stability,energy storage stability,and photothermal conversion *** importantly,this coating strategy is universal by integrating different MOFs and solar absorbers,showing the potential to accelerate the major breakthroughs of high-efficiency MOF-based photothermal composite PCMs in solar energy utilization.

关键词： Phase change materials Metal organic frameworks Photothermal conversion Thermal energy storage Photon harvester

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Preparation of Porous Hollow Spherical Moox/C Catalyst for Efficient Extraction and Oxidative Desulfurization

SSRN

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SSRN 2023年

作者： Guo, Junzhen Li, Baozhen Zhao, Danfeng Chu, Liang Yang, Haibin Huang, Zhi Liu, Zhaohui Yang, Mu Wang, Ge Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory of Function Materials for Molecule & Structure Construction School of Materials Science and Engineering University of Science and Technology Beijing Beijing100083 China

To obtain low-sulfur fuel and reduce SOX emissions, we are developing a MoOX/C hollow sphere catalyst with adjustable oxygen vacancies for oxidative desulfurization (ODS) of fuel. Herein, porous MoOX/C hollow spheres with radial nanosheet structure were synthesized by pyrolysis of polydopamine-molybdic (PDA-Mo) precursors. The limiting effect of the carbon layer caused MoOX to be uniformly embedded in the carbon support. Then partial oxidization led to forming more meso-/micro-pores and a larger specific surface area (406.4 m2 g-1), and to obtain crystal and abundant oxygen vacancies, so increased the content of effective active sites and enhanced the activity of the composite catalyst. Accordingly, the MoOX/C catalysts were employed in oxidative desulfurization (ODS) with H2O2 as an oxidant and displayed excellent performance. The dibenzothiophene (DBT) was eliminated 100% on the optimal catalyst MoOX/C-750-4 within 15 min at 60 °C and had a high turnover frequency (22.6 h-1). Furthermore, in-situ formation of C encompassing MoOX could reduce active site leaching and maintain good reaction stability. After eight recycles, the removal rate of DBT was still 98.6%. This study provides a universal in-situ pyrolysis strategy for constructing supported metal oxides and designing high-capacity ODS catalysts. © 2023, The Authors. All rights reserved.

关键词： Oxygen vacancies

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Amphiphilic Halloysite Nanotube Enclosing Molybdenum Oxide as Nanoreactor for Efficient Desulfurization of Diesel Fuels

SSRN

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SSRN 2022年

作者： Guo, Junzhen Chu, Liang Yang, Haibin Huang, Zhi Yang, Mu Wang, Ge Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory of Function Materials for Molecule & Structure Construction School of Materials Science and Engineering University of Science and Technology Beijing Beijing100083 China

Hollow nanomaterials are regarded as the outstanding supports due to their confinement effect and stable carries, which can enhance the performance of the supported catalysts and even simplify the process. In this work, halloysite nanotubes (HNT) are chosen as the support due to their monoclinic tubular structures with two different surface compositions and surface charges. By a simple impregnation approach, MoOx is immobilized in the internal surface of HNT, then modify with organosilanes on the external surface of HNT to yield the amphiphilic Mo/HNT/S nanoreactor. The catalyst exhibits prominent activity for oxidative desulfurization in solvent-free system, the desulfurization rate of dibenzothiophene (DBT) reaches 100% and the turnover frequency (TOF) value could reach 67.5 h-1 at 60°C with 15 min, which is higher than most reported Mo-based catalysts. Moreover, the spatial confinement function of the HNT nanoreactor ensures the robust recyclability of the active ingredients and the sulfur removal efficiency almost no appreciably decrease after being recycled for 5 times. Additionally, oxidation products can be completely adsorbed by the nanotube lumen and separated from the model fuel. This catalysis-sorption method eliminates the following solvent extraction step in the oxidative desulfurization procedure. Thus, the catalyst is a promising candidate for large-scale industrial application. © 2022, The Authors. All rights reserved.

关键词： Nanotubes

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