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Photocatalysts: Synergetic Photocatalytic Nanostructures Based on Au/TiO2/Reduced Graphene Oxide for Efficient Degradation of Organic Pollutants (Part. Part. Syst. Charact. 3/2017)

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Particle & Particle Systems Characterization 2017年第3期34卷

作者： Liwei Zhao Hongbo Xu Bo Jiang Yudong Huang MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical Engineering State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin 150001 China State Key Laboratory of Mineral Processing Bejing 102628 China

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Native diversity buffers against severity of non-native tree invasions ( vol 621,pg 773 , 2023 )

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NATURE 2023年第7982期622卷 E2-E2页

作者： Delavaux, Camille S. Crowther, Thomas W. Zohner, Constantin M. Robmann, Niamh M. Lauber, Thomas van den Hoogen, Johan Kuebbing, Sara Liang, Jingjing de-Miguel, Sergio Nabuurs, Gert-Jan Reich, Peter B. Abegg, Meinrad Yao, Yves C. Adou Alberti, Giorgio Zambrano, Angelica M. Almeyda Alvarado, Braulio Vilchez Alvarez-Davila, Esteban Alvarez-Loayza, Patricia Alves, Luciana F. Ammer, Christian Anton-Fernandez, Clara Araujo-Murakami, Alejandro Arroyo, Luzmila Avitabile, Valerio Aymard, Gerardo A. Baker, Timothy R. Balazy, Radomir Banki, Olaf Barroso, Jorcely G. Bastian, Meredith L. Bastin, Jean-Francois Birigazzi, Luca Birnbaum, Philippe Bitariho, Robert Boeckx, Pascal Bongers, Frans Bouriaud, Olivier Brancalion, Pedro H. S. Brandl, Susanne Brienen, Roel Broadbent, Eben N. Bruelheide, Helge Bussotti, Filippo Gatti, Roberto Cazzolla Cesar, Ricardo G. Cesljar, Goran Chazdon, Robin Chen, Han Y. H. Chisholm, Chelsea Cho, Hyunkook Cienciala, Emil Clark, Connie Clark, David Colletta, Gabriel D. Coomes, David A. Valverde, Fernando Cornejo Corral-Rivas, Jose J. Crim, Philip M. Cumming, Jonathan R. Dayanandan, Selvadurai de Gasper, Andre L. Decuyper, Mathieu Derroire, Geraldine DeVries, Ben Djordjevic, Ilija Dolezal, Jiri Dourdain, Aurelie Obiang, Nestor Laurier Engone Enquist, Brian J. Eyre, Teresa J. Fandohan, Adande Belarmain Fayle, Tom M. Feldpausch, Ted R. Ferreira, Leandro V. Fischer, Markus Fletcher, Christine Frizzera, Lorenzo Gamarra, Javier G. P. Gianelle, Damiano Glick, Henry B. Harris, David J. Hector, Andrew Hemp, Andreas Hengeveld, Geerten Herault, Bruno Herbohn, John L. Herold, Martin Hillers, Annika Coronado, Euridice N. Honorio Hui, Cang Ibanez, Thomas T. Amaral, Ieda Imai, Nobuo Jagodzinski, Andrzej M. Jaroszewicz, Bogdan Johannsen, Vivian Kvist Joly, Carlos A. Jucker, Tommaso Jung, Ilbin Karminov, Viktor Kartawinata, Kuswata Kearsley, Elizabeth Kenfack, David Kennard, Deborah K. Kepfer-Rojas, Sebastian Keppel, Gunnar Khan, Mohammed Latif Killeen, Timothy J. Kim, Hyun Seok Kitayama, Kanehiro Kohl, Michael Korju Institute of Integrative Biology ETH Zurich (Swiss Federal Institute of Technology) Zurich Switzerland Department of Genetics Evolution and Environment University College London London UK The Forest School at The Yale School of the Environment Yale University New Haven CT USA Department of Forestry and Natural Resources Purdue University West Lafayette IN USA Department of Agriculture Forestry and Bioresources Seoul National University Seoul South Korea Department of Crop and Forest Sciences University of Lleida Lleida Spain Joint Research Unit CTFC–AGROTECNIO–CERCA Solsona Spain Wageningen University and Research Wageningen The Netherlands World Agroforestry (ICRAF) Nairobi Kenya Department of Forest Resources University of Minnesota St Paul MN USA Hawkesbury Institute for the Environment Western Sydney University Penrith New South Wales Australia Institute for Global Change Biology and School for Environment and Sustainability University of Michigan Ann Arbor MI USA Swiss Federal Institute for Forest Snow and Landscape Research WSL Birmensdorf Switzerland UFR Biosciences University Félix Houphouët-Boigny Abidjan Côte d’Ivoire Department of Agricultural Food Environmental and Animal Sciences University of Udine Udine Italy Faculty of Science and Technology Free University of Bolzano Bolzano Italy Spatial Ecology and Conservation Laboratory Department of Tourism Recreation and Sport Management University of Florida Gainesville FL USA Forestry School Tecnológico de Costa Rica TEC Cartago Costa Rica Fundacion ConVida Universidad Nacional Abierta y a Distancia UNAD Medellin Colombia Field Museum of Natural Histiory Chicago IL USA Center for Tropical Research Institute of the Environment and Sustainability UCLA Los Angeles CA USA Silviculture and Forest Ecology of the Temperate Zones University of Göttingen Göttingen Germany Division of Forest and Forest Resources Norwegian Institute of Bioeconomy Research (NIBIO) Ås Norway Museo de Hi

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Reversible Band Gap Narrowing of Sn‐Based Hybrid Perovskite Single Crystal with Excellent Phase Stability

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Angewandte Chemie 2018年第45期130卷

作者： Dianxing Ju Xiaopeng Zheng Jialiang Liu Yan Chen Jian Zhang Bingqiang Cao Hang Xiao Omar F. Mohammed Osman M. Bakr Xutang Tao State Key Laboratory of Crystal Materials & Institute of Crystal Materials Shandong University No. 27 Shanda South Road Jinan 250100 P. R. China Division of Physical Sciences and Engineering KAUST Catalysis Center King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Materials Research Center for Energy and Photoelectrochemical Conversion School of Material Science and Engineering University of Jinan Jinan 250022 Shandong China International Center for Applied Mechanics State Key Laboratory for Strength and Vibration of Mechanical Structures School of Aerospace Xi'an Jiaotong University Xi'an 710049 China Yonghong Zhang Family Center for Advanced Materials for Energy and Environment Department of Earth and Environmental Engineering Columbia University New York NY 10027 USA

An intriguing reversible band gap narrowing behavior of the lead‐free hybrid perovskite single crystal DMASnI 3 (DMA=CH 3 NH 2 CH 3 + ) from yellow to black is observed without phase transformation. We discuss the transformation mechanism in detail. More interestingly, the transformed samples in black can rapidly self‐heal into yellow ones when exposed to deionized water (DI water). Contrary to other hybrid perovskites, DMASnI 3 crystals exhibit excellent water phase stability. For example, DMASnI 3 was immersed in DI water for 16 h and no decomposition was observed. Inspired by its excellent water phase stability, we demonstrate a potential eco‐friendly application of DMASnI 3 in photo‐catalysis for H 2 evolution in DI water. We present the first H 2 evolution rate of 0.64 μmol h −1 with good recycling properties for pure DMASnI 3 crystals. After the narrowing process, the optical band gap of DMASnI 3 can be lowered from 2.48 eV to 1.32 eV. Systematical characterizations are applied to investigate their structures and optoelectronic properties. The reversible band gap narrowing behavior and outstanding electrical properties, such as higher carrier mobility and long carrier lifetime show that DMASnI 3 has a great potential for optoelectronic applications.

关键词： Bandlückenverengung Bleifreie Perowskite Optoelektronische Eigenschaften Phasenstabilität

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Corrigendum: The effect of boron concentration on the structure and elastic properties of Ru-Ir alloys: first-principles calculations (materials Research Express 5 046505)

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materials Research Express 2018年第6期5卷

作者： Xiaolong Li Zhaobo Zhou Riming Hu Xiaolong Zhou Jie Yu Manmen Liu Faculty of Material Science and Engineering Kunming University of Science and Technology Kunming 650093 People's Republic of China Key Laboratory of Advanced Materials of Yunnan Province Kunming 650093 People's Republic of China School of Physics Southeast University Nanjing Jiangsu 211189 People's Republic of China Author to whom any correspondence should be addressed. State Key Laboratory of Rare Precious Metals Comprehensive Utilization of New Technologies Kunming 650106 People's Republic of China

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Interaction of boron with graphite: A van der Waals density functional study

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Applied Surface Science 2016年 379卷 402-410页

作者： Juan Liu Chen Wang Tongxiang Liang Wensheng Lai Beijing Key Lab of Fine Ceramics Institute of Nuclear and New Energy Technology Tsinghua University Beijing 100084 China State Key Lab of New Ceramic and Fine Processing Tsinghua University Beijing 100084 China Advanced Material Laboratory School of Materials Science & Engineering Tsinghua University Beijing 100084 China

Boron doping has been widely investigated to improve oxidation resistance of graphite. In this work the interaction of boron with graphite is investigated by a van der Waals density-functional approach (vdW-DF). The traditional density-functional theory (DFT) is well accounted for the binding in boron-substituted graphite. However, to investigate the boron atom on graphite surface and the interstitial impurities require use of a description of graphite interlayer binding. Traditional DFT cannot describe the vdW physics, for instance, GGA calculations show no relevant binding between graphite sheets. LDA shows some binding, but they fail to provide an accurate account of vdW forces. In this paper, we compare the calculation results of graphite lattice constant and cohesive energy by several functionals, it shows that vdW-DF such as two optimized functionals optB88-vdW and optB86b-vdW give much improved results than traditional DFT. The vdW-DF approach is then applied to study the interaction of boron with graphite. Boron adsorption, substitution, and intercalation are discussed in terms of structural parameters and electronic structures. When adsorbing on graphite surface, boron behaves as π electron acceptor. The π electron approaches boron atom because of more electropositive of boron than carbon. For substitution situation, the hole introduced by boron mainly concentrates on boron and the nearest three carbon atoms. The B-doped graphite system with the hole has less ability to offer electrons to oxygen, ultimately resulted in the inhibition of carbon oxidation. For interstitial doping, vdW-DFs show more accurate formation energy than LDA. PBE functional cannot describe the interstitial boron in graphite reasonably because of the ignoring binding of graphite sheets. The investigation of electron structures of boron doped graphite will play an important role in understanding the oxidation mechanism in further study.

关键词： Graphite Boron van der Waals density functional Oxidation

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Aluminum-Doped Zinc Oxide as Highly Stable Electron Collection Layer for Perovskite Solar Cells

Aluminum-Doped Zinc Oxide as Highly Stable Electron Collecti...

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第三届新型太阳能电池学术研讨会

作者： Xingyue Zhao Heping Shen Ye Zhang Xin Li Xiaochong Zhao Meiqian Tai Jingfeng Li Jianbao Li Xin Li Hong Lin State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua University Science and Technology on Surface Physics and Chemistry Laboratory Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources Hainan University Pen-Tung Sah Institute of Micro-Nano Science and Technology Xiamen University

Although low-temperature,solution-processed zinc oxide（ZnO） has been widely adopted as the electron collection layer（ECL） in perovskite solar cells（PSCs） because of its simple synthesis and excellent electrical properties such as high charge mobility,the thermal stability of the perovskite films deposited atop ZnO layer remains as a major ***,we addressed this problem by employing aluminum-doped zinc oxide（AZO） as the ECL and obtained extraordinarily thermally stable perovskite *** improvement of the thermal stability was ascribed to diminish of the Lewis acid–base chemical reaction between perovskite and ***,the outstanding transmittance and conductivity also render AZO layer as an ideal candidate for transparent conductive electrodes,which enables a simplified cell structure featuring glass/AZO/perovskite/Spiro-OMe TAD/*** of the perovskite layer leads to an excellent and repeatable photovoltaic performance,with the champion cell exhibiting an open-circuit voltage（Voc） of 0.94 V,a short-circuit current（Jsc） of 20.2 m A cm,a fill factor（FF） of 0.67,and an overall power conversion efficiency（PCE） of 12.6% under standard 1 sun *** was also revealed by steady-state and time-resolved photoluminescence that the AZO/perovskite interface resulted in less quenching than that between perovskite and hole transport material.

关键词： Solar cell perovskite zinc oxide aluminum doping thermally stable

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Synthesis of Non-oxide Porous Ceramics Using Random Copolymers as Precursors

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Journal of materials Science & technology 2015年第1期31卷 120-124页

作者： Xiaoqian Wang Kewei Wang Jie Kong Yiguang Wang Linan An State Key Laboratory of Solidification Processing Northwestern Polytechnical University Science and Technology on Thermo structural Composite Materials Laboratory Northwestern Polytechnical University Department of Applied Chemistry School of ScienceNorthwestern Polytechnical University Department of Materials Science and Engineering Advanced Materials Processing and Analysis CenterUniversity of Central Florida

In this paper,we reported a novel method for synthesis of non-oxide porous ceramics by using random copolymers as precursors.A silazane oligomer and styrene monomer were used as starting materials,which were copolymerized at 120 ℃ to form random polysilazane-polystyrene *** copolymers were then pyrolyzed at 500 ℃ to obtain porous ceramics by completely decomposing polystyrene（PS） and converting polysilazane（PSZ） into non-oxide Si-C-N *** obtained material contained a bi-model pore-structure consisting of both micro-sized and nano-sized pores with very high surface area of more than500 m;/*** also demonstrated that the pore structure and surface area of the materials can be tailored by changing the ratio of the two *** results suggest a promising simple method for making multiscaled porous non-oxide materials.

关键词： Non-oxide porous ceramics Polymer-derived ceramics

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Highly efficient piezotronic strain sensors with symmetrical Schottky contacts on the monopolar surface of ZnO nanobelts

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Nanoscale 2015年第5期7卷 1796-1801页

作者： Zhang, Zheng Liao, Qingliang Zhang, Xiaohui Zhang, Guangjie Li, Peifeng Lu, Shengnan Liu, Shuo Zhang, Yue State Key Laboratory for Advanced Metals and Materials School of Materials Science and Engineering University of Science and Technology Beijing China Key Laboratory of New Energy Materials and Technologies University of Science and Technology Beijing Beijing100083 China

Piezotronic strain sensors have drawn a lot of attention since the piezotronic theory was established. In this work, we developed a flexible piezotronic strain sensor based on an indium-doped ZnO nanobelt, of which the top surface was the monopolar surface. By connecting two electrodes with the two ends of the top surface of the nanobelt, the strain sensor was constructed. Compared with a nanorod/nanowire based strain sensor, this monopolar surface device avoids the need to identify the polar direction. Under strain, a static potential with the same value and polarity was generated by the coupling effect of the piezoelectric effect and the Poisson effect. This induced piezopotential influenced the Schottky barrier heights at the interfaces of both the source and drain electrodes, resulting in current changes with the same trend at forward and reverse biases. By applying a series of periodical strains, the sensor showed clear, fast and accurate current responses. The gauge factor achieved for compressive strain was 4036. This type of piezotronic strain sensor with a polar surface facing upward presented a high performance and easier fabrication, showing promise for applications in electrical mechanical sensors and MEMS. © The Royal Society of Chemistry 2015.

关键词： Nanorods

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Discontinuous Precipitation Reaction Front of Cellular Recrystallization for a Single-Crystal Superalloy Studied by Electron Microscopy

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Chinese Physics Letters 2015年第7期32卷 106-109页

作者：卓龙超梁淑华王锋刘玉峰熊继春 School of Materials Science and Engineering Xi'an University of Technology Xi'an 710048 National Center for Electron Microscopy in Beijing School of Materials Science and Engineering State Key Laboratory of New Ceramics and Fine Processing Laboratory of Advanced Materials Tsinghua University Beijing 100084 State Key Lab of Power Systems Department of Thermal Engineering Tsinghua University Beijing 100084 Science and Technology on Advanced High Temperature Structural Materials Laboratory Beijing Institute of Aeronautical Materials Beijing 100095

Combining analytical transmission electron microscopy systematic tilting, scanning transmission electron microscopy mapping and nano-beam electron diffraction operations, we obtain direct experimental proofs on the boundary type, elemental distribution and structure of the cellular reerystallization reaction front for a single- crystal superalloy. It is demonstrated that the cellular recrystallization reaction front usually corresponds to coincidence site lattice boundaries, and a thin layer of γ-forming elements such as Re, Cr, Mo and Co invariably exists in the direct reaction front. Furthermore, the thin layer with γ-forming elements is proved to be γ phase, with the same orientation as the neighboring original matrix.

关键词： CR OM Discontinuous Precipitation Reaction Front of Cellular Recrystallization for a Single-Crystal Superalloy Studied by Electron Microscopy

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Pronounced effect of ZnTe nanoinclusions on thermoelectric properties of Cu_(2-x) Se chalcogenides

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Science China materials 2016年第2期59卷 135-143页

作者： Muhammad Umer Farooq Sajid Butt 高克玮孙喜贵庞晓露 Asif Mahmood Waqar Mahmood Sajid U.Khan Nasir Mahmood School of Materials Science and Engineering University of Science and Technology Beijing Department of Materials Science and Engineering Institute of Space Technology State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Department of Material Science and Engineering College of Engineering Peking University Department of Physics Thin Film Technology (TFT) Research LaboratoryCOMSATS Institute of Information Technology Department of Materials Science and Engineering Institute of Space Technology Institute of Superconducting and Electronic Materials Australian Institute of Innovative MaterialsUniversity of Wollongong

Metal chalcogenides especially Cu2-x Se has gained much attention in thermoelectric community due to its complex crystal structure and superionic behavior. Here, we report a facile method to improve the thermoelectric efficiency by introducing Zn Te nanoinclusions into the matrix of Cu2-x Se. As a result, a substantial improvement of 32% in electrical conductivity of Cu2-x Se-Zn Te composite is observed. The increase in electrical conductivity is at the expense of Seebeck coefficient, which slightly decreases the power factor of the composite samples than that of pure Cu2-x Se. Furthermore, the introduction of secondary phase facilitates in declining the total thermal conductivity of Cu2-x Se-Zn Te composite up to 34% by suppressing the lattice thermal contributions. Thus, the moderate power factor and lower thermal conductivity values result in an improved figure of merit(z T) value of ~0.40 in mid-range temperature(750 K) for Cu2-x Se-Zn Te composite with 10 wt.% of Zn Te, which is about 40% higher than that of its pure counterpart. Hence, it is believed that the incorporation of Zn Te nanoinclusions in the matrix of Cu2-x Se may be an important route to improve the thermoelectric properties of Cu2-x Se based compounds.

关键词： ZnTe nanoparticles Cu2S thermoelectric materialas Cu2-xSe-ZnTe composite thermal conductivity

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