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Advances in designing heterojunction photocatalytic materials

Chinese Journal of Catalysis 2021年第5期42卷 710-730页

作者： Zongpeng Wang Zhiping Lin Shijie Shen Wenwu Zhong Shaowen Cao School of Advanced Study Taizhou UniversityTaizhou 318000ZhejiangChina State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina School of Pharmaceutical and Material Engineering Taizhou UniversityTaizhou 318000ZhejiangChina

Under the background of increasing energy crisis and global warming,semiconductor-based photocatalysis has received tremendous attention due to its potential application in green energy production,CO_(2) reduction and pollutant *** photocatalytic activity of semiconductors,however,remains low due to issues like fast recombination of photo-generated electron-hole pairs,limited electron mobility,restricted optical absorption or insufficient active *** appropriate heterojunctions is proved to be a promising method to address most of these issues and thus to improve the photocatalytic *** this review,the working mechanism of various heterojunctions is presented *** most recent advances of strategies in designing and preparing efficient heterojunction photocatalysts are further summarized and some perspectives on the future directions in this field are provided.

关键词： Photocatalyst Heterojunction Renewable energy Charge transfer Redox ability

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ZIF-8/LiFePO4 derived Fe-N-P Co-doped carbon nanotube encapsulated Fe2P nanoparticles for efficient oxygen reduction and Zn-air batteries

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Nano Research 2020年第3期13卷 818-823页

作者： Huihui Jin Huang Zhou Pengxia Ji Chengtian Zhang Jiahuan Luo Weihao Zeng Chenxi Hu Daping He Shichun Mu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Hubei Engineering Research Center of RF-Microwave Technology and Application Wuhan University of TechnologyWuhan 430070China Department of Chemical and Environmental Engineering Anyang Institute of TechnologyAnyang 455000China

Iron-based oxygen reduction reaction(ORR)catalysts have been the focus of research,and iron sources play an important role for the preparation of efficient ORR ***,we successfully use LiFePO4 as ideal sources of Fe and P to construct the heteroatom doped Fe-based carbon *** obtained Fe-N-P co-doped coral-like carbon nanotube arrays encapsulated Fe2P catalyst(C-ZIF/LFP)shows very high half-wave potential of 0.88 V in alkaline electrolytes toward ORR,superior to Pt/C(0.85 V),and also presents a high half-wave potential of 0.74 V in acidic electrolytes,comparable to Pt/C(0.8 V).When further applied into a home-made Zn-air battery as cathode,a peak power density of 140 mW·cm^-2 is reached,exceeds commercial Pt/C(110 mW·cm^-2).Besides,it also presents exceptional durability and methanol resistance compared with Pt/***,the preparation method of such a high-performance catalyst is simple and easy to optimize,suitable for the large-scale ***’s more,it opens up a more sustainable development scenario to reduce the hazardous wastes such as LiFePO4 by directly using them for preparing high-performance ORR catalysts.

关键词： LiFePO4 waste utilization ZIF-8 heteroatoms-doped oxygen reduction reaction

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Prediction of Primary Dendrite Arm Spacing in Pulsed Laser Surface Melted Single Crystal Superalloy

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Acta Metallurgica Sinica(English Letters) 2021年第4期34卷 485-494页

作者： Shiwei Ci Jingjing Liang Jinguo Li Haiwei Wang Yizhou Zhou Xiaofeng Sun Hongwei Zhang Yutian Ding Xin Zhou Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China Space Manufacturing Technology(CAS Key Lab) Beijing100094China Taizhou Xinma Technology Industry Develepment Co.Ltd Taizhou318000China State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metal Lanzhou University of Technology287 Langongping RoadLanzhou730000China Science and Technology On Plasma Dynamics Laboratory Air Force Engineering UniversityXi’an710000China

Primary dendritic arm spacing(PDAS)is an important microstructure feature of the nickel-base single crystal *** this paper,a numerical model predicting the PDAS evolution with additive manufacturing parameters using pulsed laser is established,which combines the theoretical PDAS models with the temperature field calculation model during pulsed laser *** on this model,processing maps that related process parameters to the evolution of PDAS are *** obtain more accurate prediction model,the parameters of different solidification conditions,G^(-0.5)V^(-0.25) and G^(-0.5)V^(-0.25),are selected to calculate *** simulation results show that the PDAS increases as the arise of P and *** processmgPDAS map can accurately predict the evolution of PDAS with pulsed laser process parameters,which is well in accordance with the experimental ***,the PDAS values calculated by the G^(-0.5)V^(-0.25) are more in line with the experimental results than those calculated by the G^(-0.5)V^(-0.25).

关键词： Additive manufacturing Nickel-base superalloy Single crystal Pulsed laser Primary dendritic arm spacing

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Interface enhanced well-dispersed Co9S8 nanocrystals as an efficient polysulfide host in lithium–sulfur batteries

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Journal of Energy Chemistry 2020年第9期29卷 109-115,I0004页

作者： Xue Liu Qiu He Hong Yuan Chong Yan Yan Zhao Xu Xu Jia-Qi Huang Yu-Lun Chueh Qiang Zhang Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070HubeiChina State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070HubeiChina Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China Department of Materials Science and Engineering Taiwan Tsinghua UniversityHsinchu 30013TaiwanChina

The high specific capacity and energy density of lithium-sulfur batteries have attracted strong considerations on their fundamental mechanism and energy ***,polysulfide shuttle is still the key issue that impedes the development of Li-S *** nanocrystal hosts for polysulfide immobilization and conversion is a promising *** this contribution,we have investigated well-dispersed Co9S8 nanocrystals grown on graphene oxide(GO)nanosheets with different degrees of dispersion as cathode host materials for Li-S *** Co9S8-GO composite with 1 wt%GO(GCS1)has an average crystal size of 76 nm and shows the strongest adsorption capability toward lithium *** used as the host material for the cathode of Li-S batteries,the GCS1-sulfur composite exhibits an initial specific capacity of^-1000 mAh g^-1 at 0.5 C and shows an average decay rate of 0.11%for 500 *** work on the dispersion control of Co9S8 nanocrystals may inspire more investigations on well-dispersed nanocrystal based hosts for Li-S batteries.

关键词： Metal sulfides Composite sulfur cathode Cobalt sulfides Lithium-sulfur batteries Electrocatalysis

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Machine Learning for Battery Research

SSRN

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SSRN 2022年

作者： Zhao, Yan Wei, Zheng He, Qiu International School of Materials Science and Engineering State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Hubei430070 China The Institute of Technological Sciences Wuhan University Wuhan Hubei430072 China

Batteries are vital energy storage carriers in industry and in our daily life. There is continued interest in the developments of batteries with excellent service performance and safety. Traditional trial-and-error experimental approaches have the limitations of high-cost and low-efficiency. Atomistic computational simulations are relatively expensive and take long time to screen massive materials. The rapid development of machine learning (ML) has brought innovations in many fields and has also changed the paradigm of the battery research. Numerous ML applications have emerged in the battery community, such as novel materials discovery, property prediction, and characterization. In this review, we introduced the workflow of ML, where the task, data, feature engineering, and evaluation were involved. Several typical ML models used in batteries were highlighted. In addition, we summarized the applications of ML for the discovery of novel materials, and for property and battery state prediction. The challenges for the application of ML in batteries were also discussed. © 2022, The Authors. All rights reserved.

关键词： Machine learning

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3D nonlinear photolithography of tin oxide ceramics via femtosecond laser

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Science China materials 2021年第6期64卷 1477-1484页

作者： Nianyao Chai Yanan Liu Yunfan Yue Ping Wei Xuewen Wang Junjie Zhao Qi Zhang Fuzhi Huang Zhongle Zeng Zongsong Gan Liqiang Mai Yibing Cheng State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong LaboratoryFoshan 528216China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China

As a wide band gap semiconductor material,tin oxide(SnO_(2))has been widely used in gas sensing,optoelectronics and *** complex micro and nanoscale threedimensional(3D)geometric structures endow the conventional SnO_(2)ceramics with novel properties and ***,ceramics cannot be cast or machined easily due to their high mechanical toughness and *** additive manufacturing opens a great opportunity for flexibly geometrical shaping,while the arbitrary shaping of SnO_(2)ceramics at micro and nanoscale is always a ***,preceramic monomers which can be polymerized under ultrafast laser irradiation,were utilized to form complex and arbitrary 3D preceramic polymer *** calcination treatment,these green-body structures could be converted into pure high-dense SnO_(2)ceramics with uniform shrinkage,and the feature size was down to *** electron microscopy(TEM)analysis displays that the printed SnO_(2)ceramic nanostructures can be nanocrystallized with grain sizes of 2.5±0.4 *** work provides the possibility of manufacturing 3D SnO_(2)ceramic nanostructures arbitrarily with sub-100 nm resolution,thus making it promising for the applications of SnO_(2)in different fields.

关键词： tin oxide ceramics nonlinear photolithography femtosecond laser

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Quantum dots assisted in vivo two-photon microscopy with NIR-Ⅱemission

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Photonics Research 2022年第1期10卷 189-196页

作者： HUWEI NI YALUN WANG TAO TANG WENBIN YU DONGYU LI MUBIN HE RUNZE CHEN MINGXI ZHANG JUN QIAN State Key Laboratory of Modern Optical Instrumentations Centre for Optical and Electromagnetic ResearchCollege of Optical Science and EngineeringInternational Research Center for Advanced PhotonicsZhejiang UniversityHangzhou 310058China SIEE(Sussex AI Institute) Zhejiang Gongshang UniversityHangzhou 310018China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Britton Chance Center for Biomedical Photonics Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan 430074China

With the advantages of high resolution and deep penetration depth,two-photon excited NIR-Ⅱ(900–1880 nm)fluorescence(2PF)microscopic bioimaging is ***,due to the lack of imaging systems and suitable probes,few such works,to our best knowledge,were demonstrated utilizing NIR-II excitation and NIR-Ⅱfluorescence ***,we used aqueously dispersible Pb S/Cd S quantum dots with bright NIR-II fluorescence as the contrast *** the excitation of a 1550 nm femtosecond(fs)laser,they emitted bright 2 PF in the NIR-Ⅱ***,a 2PF lifetime imaging microscopic(2PFLIM)system was implemented,and in vivo 2PFLIM images of mouse brain blood vessels were obtained for the first time to our best *** improve imaging speed,an in vivo two-photon fluorescence microscopy(2 PFM)system based on an In Ga As camera was implemented,and in vivo 2PFM images of QDs-stained mouse brain blood vessels were obtained.

关键词： excitation photon system

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Tuning ferroelectricity of polymer blends for flexible electrical energy storage applications

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Science China materials 2021年第7期64卷 1642-1652页

作者： Xin Zhang Yanda Jiang Ruoqi Gao Xinhui Li Zhonghui Shen Bao-Wen Li Qingfeng Zhang Shujun Zhang Ce-Wen Nan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center of Smart Materials and DevicesWuhan University of TechnologyWuhan 430070China International School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China Hubei Key Lab of Ferro&Piezoelectric Materials and Devices School of Materials Science&EngineeringHubei UniversityWuhan 430062China Institute for Superconducting and Electronic Materials Australian Institute of Innovative MaterialsUniversity of WollongongNorth WollongongNSW 2500Australia School of Materials Science and Engineering State Key Lab of New Ceramics and Fine ProcessingTsinghua UniversityBeijing 100084China

Ferroelectric polymers are the mainstay of advanced flexible electronic *** to tailor the ferroelectric polymer films for various applications via simple processing approaches is *** we demonstrate the tuning of ferroelectric responses can be achieved in polymer blends of poly(vinylidene fluoride-trifluoroethylene)(P(VDF-TrFE))and polymethyl methacrylate(PMMA)prepared via a simple two-step *** proposed two-step process endows the polymer blends with a random distribution of P(VDF-TrFE)crystalline phase,hence decoupling the coherent ferroelectric domain interactions between continuous ordered crystalline phases that ubiquitously existed in common P(VDF-TrFE)*** incorporation of the miscible non-crystalline PMMA chains with low-polarity results in reversal dipoles and a transition from ferroelectric to antiferroelectric-like behavior,overcoming the trade-off between the polarization and depolarization *** particular,resultant excellent mechanical and electrical properties of the polymer blend films give rise to remarkably improved breakdown strength and energy storage performance,surpassing P(VDF-TrFE)and commercial biaxial-oriented polypropylene *** work provides a simple and effective strategy to tailor the ferroelectric response of polymeric materials with great potential for flexible electrical energy storage applications.

关键词： ferroelectric polymers antiferroelectricity energy density breakdown strength dielectric

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Local amorphization in boron carbide at finite temperature: Strategies toward improved ductility

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Physical Review B 2021年第13期104卷 134105-134105页

作者： Jun Li Qi An Lisheng Liu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Department of Chemical and Materials Engineering University of Nevada-Reno Reno Nevada 89557 USA

Boron carbide (B4C) is superhard, but its engineering applications are limited by the abnormal brittle failure arising from amorphous shear band formation. Mitigating the local amorphization is essential to improve the ductility of B4C. Here, we carried out ab initio molecular dynamics (AIMD) simulations to examine the response of B4C to shear along two plausible slip systems (001)/[100] and (111)/[112¯] at finite temperature. We found that the icosahedra of B4C gradually deconstruct at finite temperature, resulting in local amorphization, thereby giving rise to a lower stress barrier than that of density functional theory simulations at zero temperature. The deconstruction of the icosahedral clusters arises from the interaction with the neighboring chains. The failure mechanism at the finite temperature suggested that the local amorphization can be suppressed by altering the structure of the 12-atom icosahedron and the 3-atom chain of B4C. To demonstrate this, we replaced the B11CP icosahedron in B4C with B12 icosahedron to form boron-rich boron carbide (B13C2) and then performed the same shear deformations. We found that local amorphization significantly decreases, which results from the modified icosahedral interaction. We also altered the 3-atom C-B-C chain to the 2-atom P-P chain and found that the accumulated shear stress can be released through icosahedral slipping, which is achieved by breaking the chains. The icosahedral slipping then prevents the destruction of icosahedra under shear deformations, expected to improve the ductility. Our results demonstrate two design strategies toward improved ductility of B4C: (1) boron enrichment can alleviate amorphous shear band formation in boron carbide, and (2) altering the 3-atom chain to a 2-atom chain and meanwhile decreasing the strength of the chain to make it less stable than the icosahedron cage may lead to an icosahedral-slipping-dominated mechanism, thereby avoiding icosahedral fracture.

关键词： Material failure Mechanical & acoustical properties Phase transitions Shear deformation

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Control of the proximity of bifunctional [email protected] 2 O 3 catalysts for efficient methanol conversion into hydrocarbons

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Catalysis Today 2022年 405-406卷 82-91页

作者： Jia-Min Lyu Shen Yu Zhao Peng Jian Zhou Zhan Liu Xiao-Yun Li Yu-Li Li-Hua Chen Bao-Lian Su State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 Hubei China State Key Laboratory of Green Chemical Engineering and Industrial Catalysis Shanghai Research Institute of Petrochemical Technology SINOPEC Shanghai 201208 China State Key Laboratory of Silicate Materials for Architecture Wuhan University of Technology Wuhan 430070 Hubei China Laboratory of Inorganic Materials Chemistry (CMI) University of Namur Namur B-5000 Namur Belgium

Bifunctional catalysts are widely applied for many important reactions as the synergetic effect of two types of active sites remarkably improves catalysis performance. However, their bifunctionality has not been fully exploited since the proximity of bifunctional catalysts is hard to control. Herein, we demonstrate a bifunctional [email protected] 2 O 3 catalyst with a core-shell structure and a nano-scale proximity by in-situ growth of γ-Al 2 O 3 nanosheets on the surface of ZSM-5 crystals for methanol conversion. The nano-scale proximity endows the catalyst with higher reaction activity and C 2 –C 3 olefins yield (53 %) in comparison to the catalysts with micro-scale proximity (20 %) and millimeter-scale proximity (27 %), which can be attributed to the fluent transport of the reaction intermediates between two types of active sites. This strategy for constructing bifunctional catalysts with nano-scale proximity is conducive to understanding the relationship between proximity and catalytic performance in methanol conversion.

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