检索结果-内蒙古大学图书馆

arXiv 2023年

作者： Basodi, Sunitha Pusuluri, Krishna Xiao, Xueli Pan, Yi Georgia State University Georgia Institute of Technology Emory University 55 Park Place AtlantaGA30303 United States Department of Computer Science Georgia State University 25 Park Place NE AtlantaGA30303 United States Faculty of Computer Science and Control Engineering Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Shenzhen University Town Room D513 1068 Xueyuan Avenue Shenzhen518055 China

Deep learning models offer superior performance compared to other machine learning techniques for a variety of tasks and domains, but pose their own challenges. In particular, deep learning models require larger training times as the depth of a model increases, and suffer from vanishing gradients. Several solutions address these problems independently, but there have been minimal efforts to identify an integrated solution that improves the performance of a model by addressing vanishing gradients, as well as accelerates the training process to achieve higher performance at larger learning rates. In this work, we intelligently determine which layers of a deep learning model to apply gradient amplification to, using a formulated approach that analyzes gradient fluctuations of layers during training. Detailed experiments are performed for simpler and deeper neural networks using two different intelligent measures and two different thresholds that determine the amplification layers, and a training strategy where gradients are amplified only during certain epochs. Results show that our amplification offers better performance compared to the original models, and achieves accuracy improvement of ∼2.5% on CIFAR-10 and ∼4.5% on CIFAR-100 datasets, even when the models are trained with higher learning rates. © 2023, CC BY-NC-ND.

关键词： Backpropagation

来源：评论

学校读者我要写书评

暂无评论

Millisecond-Order Temporal-Resolution Synchrotron X-ray Tomography without Sample Rotation 14

Millisecond-Order Temporal-Resolution Synchrotron X-ray Tomo...

引用

14th International Conference on Synchrotron Radiation Instrumentation, SRI 2021

作者： Yashiro, Wataru Liang, Xiaoyu Voegeli, Wolfgang Arakawa, Etsuo Shirasawa, Tetsuroh Kajiwara, Kentaro Fujii, Katsuya Hashimoto, Koh Kudo, Hiroyuki Tohoku University 2-1-1 Katahira Aoba-ku Miyagi Sendai980-8577 Japan Tohoku University 2-1-1 Katahira Aoba-ku Miyagi Sendai980-8577 Japan Department of Applied Physics School of Engineering The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo113-8656 Japan Department of Physics Tokyo Gakugei University 4-1-1 Nukuikita-Machi Tokyo184-8501 Japan National Metrology Institute of Japan National Institute of Advanced Industrial Science and Technology 5-2-2107 1-1-1 Higashi Ibaraki Tsukuba305-8565 Japan Sayo Hyogo679-5198 Japan Faculty of Engineering Information and Systems University of Tsukuba Tsukuba305-8573 Japan

A multi-beam optics consisting of curved crystals with blades for a white synchrotron X-ray beam from a bending magnet was developed, and millisecond-order temporal-resolution X-ray tomography with a voxel size of 20 μm was successfully realized without sample rotation. The multi-beam optics opens the spatio-temporal frontier of X-ray tomography for unrepeatable and nonequilibrium systems and is expected to be applied to various fields in materials and life sciences. © Published under licence by IOP Publishing Ltd.

关键词： Imaging systems

来源：评论

学校读者我要写书评

暂无评论

Communication Experiment of Iridium Satellite and Super Pressure Balloon over Antarctica

Communication Experiment of Iridium Satellite and Super Pres...

引用

Asia-Pacific Conference on Microwave

作者： Takana Kaho Yoshitaka Saito Yoshihiro Tomikawa Faculty of Engineering Shonan Institute of Technology Fujisawa Kanagawa Japan Institute of Space and Astronautical Science Japan Aerospace Exploration Agency Sagamihara City Kanagawa Japan National Institute of Polar Research Tokyo Japan Department of Polar Science The Graduate University for Advanced Studies SOKENDAI Tokyo Japan Polar Environment Data Science Center Research Organization of Information and Systems Tokyo Japan

ISBN: (数字)9784902339567

ISBN: (纸本)9781665451086

An experiment (LODEWAVE) was conducted from January to February 2022 to measure the atmospheric gravity wave over the Antarctica using a super pressure balloon and the PANSY radar located at Syowa Station in the Antarctica. The short burst communication of the Iridium satellite was used for communication with the balloon. In this paper, we report the experimental results on the error of the position information of the balloon and the communication quality due to the use of Iridium over Antarctica.

关键词： Satellites Thermometers Atmospheric measurements Spaceborne radar Redundancy Extraterrestrial measurements Antarctica

来源：评论

学校读者我要写书评

暂无评论

Infrared upconversion imaging in nonlinear metasurfaces

引用

advanced Photonics 2021年第3期3卷 83-92页

作者： Rocio Camacho-Morales Davide Rocco Lei Xu Valerio Flavio Gili Nikolay Dimitrov Lyubomir Stoyanov Zhonghua Ma Andrei Komar Mykhaylo Lysevych Fouad Karouta Alexander Dreischuh Hark Hoe Tan Giuseppe Leo Costantino De Angelis Chennupati Jagadish Andrey E.Miroshnichenko Mohsen Rahmani Dragomir N.Neshev The Australian National University Research School of PhysicsARC Centre of Excellence for Transformative Meta-Optical SystemsDepartment of Electronic Materials EngineeringCanberraACTAustralia University of Brescia Department of Information EngineeringBresciaItaly University of New South Wales School of Engineering and Information TechnologyCanberraACTAustralia Nottingham Trent University School of Science and TechnologyAdvanced Optics and Photonics LaboratoryDepartment of EngineeringNottinghamUnited Kingdom UniversitéParis Diderot Matériaux et Phénomènes QuantiquesParisFrance Friedrich Schiller University Jena Institute of Applied PhysicsAbbe Center of PhotonicsJenaGermany Sofia University Department of Quantum ElectronicsFaculty of PhysicsSofiaBulgaria

Infrared imaging is a crucial technique in a multitude of applications,including night vision,autonomous vehicle navigation,optical tomography,and food quality *** infrared imaging technologies,however,require the use of materials such as narrow bandgap semiconductors,which are sensitive to thermal noise and often require cryogenic *** demonstrate a compact all-optical alternative to perform infrared imaging in a metasurface composed of GaAs semiconductor nanoantennas,using a nonlinear wave-mixing *** experimentally show the upconversion of short-wave infrared wavelengths via the coherent parametric process of sum-frequency *** this process,an infrared image of a target is mixed inside the metasurface with a strong pump beam,translating the image from the infrared to the visible in a nanoscale ultrathin imaging *** results open up new opportunities for the development of compact infrared imaging devices with applications in infrared vision and life sciences.

关键词： metasurfaces nonlinear optical processes infrared photonics imaging.

来源：评论

学校读者我要写书评

暂无评论

Cosmic-Ray Modulation during Solar Cycles 24-25 Transition Observed with CALET on the International Space Station 38

Cosmic-Ray Modulation during Solar Cycles 24-25 Transition O...

引用

38th International Cosmic Ray Conference, ICRC 2023

作者： Miyake, Shoko Munakata, Kazuoki Akaike, Yosui Adriani, O. Akaike, Y. Asano, K. Asaoka, Y. Berti, E. Bigongiari, G. Binns, W.R. Bongi, M. Brogi, P. Bruno, A. Cannady, N. Castellini, G. Checchia, C. Cherry, M.L. Collazuol, G. de Nolfo, G.A. Ebisawa, K. Ficklin, A.W. Fuke, H. Gonzi, S. Guzik, T.G. Hams, T. Hibino, K. Ichimura, M. Ioka, K. Ishizaki, W. Israel, M.H. Kasahara, K. Kataoka, J. Kataoka, R. Katayose, Y. Kato, C. Kawanaka, N. Kawakubo, Y. Kobayashi, K. Kohri, K. Krawczynski, H.S. Krizmanic, J.F. Maestro, P. Marrocchesi, P.S. Messineo, A.M. Mitchell, J.W. Miyake, S. Moiseev, A.A. Mori, M. Mori, N. Motz, H.M. Munakata, K. Nakahira, S. Nishimura, J. Okuno, S. Ormes, J.F. Ozawa, S. Pacini, L. Papini, P. Rauch, B.F. Ricciarini, S.B. Sakai, K. Sakamoto, T. Sasaki, M. Shimizu, Y. Shiomi, A. Spillantini, P. Stolzi, F. Sugita, S. Sulaj, A. Takita, M. Tamura, T. Terasawa, T. Torii, S. Tsunesada, Y. Uchihori, Y. Vannuccini, E. Wefel, J.P. Yamaoka, K. Yanagita, S. Yoshida, A. Yoshida, K. Zober, W.V. Ibaraki College Department of Industrial Engineering 866 Nakane Ibaraki Hitachinaka312-8508 Japan Shinshu University Faculty of Science 3-1-1 Asahi Matsumoto Nagano390-8621 Japan Japan Aerospace Exploration Agency EM Utilization Center Human Spaceflight Technology Directorate 2-1-1 Sengen Ibaraki Tsukuba305-8505 Japan Department of Physics University of Florence Via Sansone 1 Sesto Fiorentino50019 Italy INFN Sezione di Firenze Via Sansone 1 Sesto Fiorentino50019 Italy Waseda Research Institute for Science and Engineering Waseda University 17 Kikuicho Shinjuku Tokyo162-0044 Japan JEM Utilization Center Human Spaceflight Technology Directorate Japan Aerospace Exploration Agency 2-1-1 Sengen Ibaraki Tsukuba305-8505 Japan Institute for Cosmic Ray Research The University of Tokyo 5-1-5 Kashiwa-no-Ha Chiba Kashiwa277-8582 Japan Via Madonna del Piano 10 Sesto Fiorentino50019 Italy Department of Physical Sciences Earth and Environment University of Siena via Roma 56 Siena53100 Italy INFN Sezione di Pisa Polo Fibonacci Largo B. Pontecorvo 3 Pisa56127 Italy Department of Physics McDonnell Center for the Space Sciences Washington University One Brookings Drive St. LouisMO63130-4899 United States Heliospheric Physics Laboratory NASA/GSFC GreenbeltMD20771 United States Center for Space Sciences and Technology University of Maryland Baltimore County 1000 Hilltop Circle BaltimoreMD21250 United States Astroparticle Physics Laboratory NASA/GSFC GreenbeltMD20771 United States Center for Research and Exploration in Space Sciences and Technology NASA/GSFC GreenbeltMD20771 United States Department of Physics and Astronomy Louisiana State University 202 Nicholson Hall Baton RougeLA70803 United States Department of Physics and Astronomy University of Padova Via Marzolo 8 Padova35131 Italy INFN Sezione di Padova Via Marzolo 8 Padova35131 Italy Institute of Space and Astronautical Science Japan Aerospace Exploration Agency

We present the solar modulation of electrons and protons observed by the CALorimetric Electron Telescope onboard the International Space Station for about 7 years since October 2015, during the transition phase from the descending phase of the 24th solar cycle to the ascending phase of the 25th solar cycle. The observed variations of electron and proton count rates at an identical average rigidity of 3.8 GV show a clear charge-sign dependence of the solar modulation of galactic cosmic rays (GCRs), which is consistent with the prediction of a numerical drift model of the GCR transport in the heliosphere. It is also found that the ratio of 3.8 GV proton count rate to the neutron monitor count rate in the ascending phase of solar cycle 25 is clearly different from that in the descending phase of cycle 24. Correlations between the electron (proton) count rate and the heliospheric environmental parameters, such as the current sheet tilt angle, are a useful tool in further developing a numerical model of solar modulation. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Cosmology

来源：评论

学校读者我要写书评

暂无评论

Microwave heating as a universal method to transform confined molecules into armchair graphene nanoribbons

arXiv

引用

arXiv 2023年

作者： Zhang, Haoyuan Chen, Yingzhi Tang, Kunpeng Lin, Ziheng Li, Xuan Zhang, Hongwei Zhang, Yifan Saito, Takeshi Wong, Chi Ho Leung, Chi Wah Mak, Chee Leung Hu, Yuan Cui, Weili Cao, Kecheng Shi, Lei State Key Laboratory of Optoelectronic Materials and Technologies Nanotechnology Research Center Guangzhou Key Laboratory of Flexible Electronic Materials and Wearable Devices School of Materials Science and Engineering Sun Yat-sen University Guangzhou510275 China Huzhou Key Laboratory of Environmental Functional Materials and Pollution Control School of Engineering Huzhou University Huzhou313000 China Ibaraki Tsukuba305-8565 Japan Department of Industrial and Systems Engineering Research Institute for Advanced Manufacturing The Hong Kong Polytechnic University Hong Kong Department of Applied Physics The Hong Kong Polytechnic University Hong Kong Shanghai Key Laboratory of High-resolution Electron Microscopy ShanghaiTech University Shanghai201210 China

Armchair graphene nanoribbons (AGNRs) with sub-nanometer width are potential materials for fabrication of novel nanodevices thanks to their moderate direct band gaps. AGNRs are usually synthesized by polymerizing precursor molecules on substrate surface. However, it is time-consuming and not suitable for large-scale production. AGNRs can also be grown by transforming precursor molecules inside single-walled carbon nanotubes via furnace annealing, but the obtained AGNRs are normally twisted. In this work, microwave heating is applied for transforming precursor molecules into AGNRs. The fast heating process allows synthesizing the AGNRs in seconds. Several different molecules were successfully transformed into AGNRs, suggesting that it is a universal method. More importantly, as demonstrated by Raman spectroscopy, aberration-corrected high-resolution transmission electron microscopy and theoretical calculations, less twisted AGNRs are synthesized by the microwave heating than the furnace annealing. Our results reveal a route for rapid production of AGNRs in large scale, which would benefit future applications in novel AGNRs-based semiconductor devices. © 2023, CC BY.

关键词： Raman spectroscopy

来源：评论

学校读者我要写书评

暂无评论

Isotropy of Cosmic Rays beyond 1020 eV Favors Their Heavy Mass Composition

引用

Physical Review Letters 2024年第4期133卷 041001-041001页

作者： R. U. Abbasi Y. Abe T. Abu-Zayyad M. Allen Y. Arai R. Arimura E. Barcikowski J. W. Belz D. R. Bergman S. A. Blake I. Buckland B. G. Cheon M. Chikawa T. Fujii K. Fujisue K. Fujita R. Fujiwara M. Fukushima G. Furlich N. Globus R. Gonzalez W. Hanlon N. Hayashida H. He R. Hibi K. Hibino R. Higuchi K. Honda D. Ikeda N. Inoue T. Ishii H. Ito D. Ivanov A. Iwasaki H. M. Jeong S. Jeong C. C. H. Jui K. Kadota F. Kakimoto O. Kalashev K. Kasahara S. Kasami S. Kawakami K. Kawata I. Kharuk E. Kido H. B. Kim J. H. Kim S. W. Kim Y. Kimura I. Komae V. Kuzmin M. Kuznetsov Y. J. Kwon K. H. Lee B. Lubsandorzhiev J. P. Lundquist H. Matsumiya T. Matsuyama J. N. Matthews R. Mayta K. Mizuno M. Murakami I. Myers S. Nagataki K. Nakai T. Nakamura E. Nishio T. Nonaka H. Oda S. Ogio M. Onishi H. Ohoka N. Okazaki Y. Oku T. Okuda Y. Omura M. Ono A. Oshima H. Oshima S. Ozawa I. H. Park K. Y. Park M. Potts M. S. Pshirkov J. Remington D. C. Rodriguez C. Rott G. I. Rubtsov D. Ryu H. Sagawa R. Saito N. Sakaki T. Sako N. Sakurai D. Sato K. Sato S. Sato K. Sekino P. D. Shah N. Shibata T. Shibata J. Shikita H. Shimodaira B. K. Shin H. S. Shin D. Shinto J. D. Smith P. Sokolsky B. T. Stokes T. A. Stroman Y. Takagi K. Takahashi M. Takamura M. Takeda R. Takeishi A. Taketa M. Takita Y. Tameda K. Tanaka M. Tanaka Y. Tanoue S. B. Thomas G. B. Thomson P. Tinyakov I. Tkachev H. Tokuno T. Tomida S. Troitsky R. Tsuda Y. Tsunesada S. Udo F. Urban D. Warren T. Wong K. Yamazaki K. Yashiro F. Yoshida Y. Zhezher Z. Zundel Department of Physics Loyola University Chicago Chicago Illinois 60660 USA Academic Assembly School of Science and Technology Institute of Engineering Shinshu University Nagano Nagano 380-8554 Japan High Energy Astrophysics Institute and Department of Physics and Astronomy University of Utah Salt Lake City Utah 84112-0830 USA Graduate School of Science Osaka Metropolitan University Sugimoto Sumiyoshi Osaka 558-8585 Japan Department of Physics and The Research Institute of Natural Science Hanyang University Seongdong-gu Seoul 426-791 Korea Institute for Cosmic Ray Research University of Tokyo Kashiwa Chiba 277-8582 Japan Nambu Yoichiro Institute of Theoretical and Experimental Physics Osaka Metropolitan University Sugimoto Sumiyoshi Osaka 558-8585 Japan Institute of Physics Academia Sinica Taipei City 115201 Taiwan Astrophysical Big Bang Laboratory RIKEN Wako Saitama 351-0198 Japan Faculty of Engineering Kanagawa University Yokohama Kanagawa 221-8686 Japan Interdisciplinary Graduate School of Medicine and Engineering University of Yamanashi Kofu Yamanashi 400-8511 Japan The Graduate School of Science and Engineering Saitama University Saitama Saitama 338-8570 Japan Department of Physics SungKyunKwan University Jang-an-gu Suwon 16419 Korea Department of Physics Tokyo City University Setagaya-ku Tokyo 158-8557 Japan Institute for Nuclear Research of the Russian Academy of Sciences Moscow 117312 Russia Faculty of Systems Engineering and Science Shibaura Institute of Technology Minato-ku Tokyo 337-8570 Japan Graduate School of Engineering Osaka Electro-Communication University Hatsu-cho Neyagawa-shi Osaka 572-8530 Japan Service de Physique Théorique Université Libre de Bruxelles Brussels 1050 Belgium Department of Physics Yonsei University Seodaemun-gu Seoul 120-749 Korea Center for Astrophysics and Cosmology University of Nova Gorica Nova Gorica 5297 Slovenia Faculty of Science Kochi University Kochi Kochi 780-8520 Japan Department of P

We report an estimation of the injected mass composition of ultrahigh energy cosmic rays (UHECRs) at energies higher than 10 EeV. The composition is inferred from an energy-dependent sky distribution of UHECR events observed by the Telescope Array surface detector by comparing it to the Large Scale Structure of the local Universe. In the case of negligible extragalactic magnetic fields (EGMFs), the results are consistent with a relatively heavy injected composition at E∼10 EeV that becomes lighter up to E∼100 EeV, while the composition at E>100 EeV is very heavy. The latter is true even in the presence of highest experimentally allowed extragalactic magnetic fields, while the composition at lower energies can be light if a strong EGMF is present. The effect of the uncertainty in the galactic magnetic field on these results is subdominant.

关键词： Cosmic ray composition & spectra Cosmic ray sources Cosmic rays & astroparticles

来源：评论

学校读者我要写书评

暂无评论

Helium's Impact: Unraveling Bubble Formation in Fe2alb2 Under Extreme Conditions of Temperature and Fluence

SSRN

引用

SSRN 2023年

作者： Li, Jiaqi He, Xiaoxun Chen, Ke Cao, Xingzhong Jin, Shuoxue Li, Jun Wei, Haiyuan Zhou, Junjun Zhang, Tongmin Xu, Shuai Ge, Fangfang Duchoň, Jan Polcar, Tomas Daghbouj, N. Li, Bingsheng State Key Laboratory for Environment-friendly Energy Materials Southwest University of Science and Technology Sichuan Mianyang621010 China Engineering Laboratory of Advanced Energy Materials Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Zhejiang Ningbo315201 China Multi-disciplinary Research Division Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China Institute of Modern Physics Chinese Academy of Sciences Gansu Lanzhou73000 China Department of Control Engineering Faculty of Electrical Engineering Czech Technical University in Prague Technická 2 Prague 6160 00 Czech Republic Institute of Physics The Czech Academy of Sciences Na Slovance 1999/2 Prague 8182 21 Czech Republic Department of Materials

Layered carbides and borides, blending ceramic and metallic properties, offer great promise for future nuclear reactor applications due to their complex nanolaminate crystal structure. We conducted a comprehensive investigation to understand the profound effects of He ion irradiation on polycrystalline Fe2AlB2 samples exposed to varying fluences and temperatures, emulating conditions akin to future nuclear reactors, highlighting the study's critical *** at room temperature triggers significant changes in lattice parameters: the a-lattice parameter expands, while the c-lattice parameter contracts, leading to an amorphous layer. After annealing at 400°C, the amorphous structure persists, whereas annealing at 800°C initiates complete recrystallization, accompanied by bubble growth. Conversely, irradiation at 400°C with the same fluence results in smaller bubbles without an amorphous layer. DBS analysis reveals rapid growth of vacancy-type defects during irradiation at 400°C, surpassing the rate observed at room temperature before annealing. Under irradiation at 700°C, faceted bubbles develop exclusively within Fe2AlB2, with no such bubbles in Al2O3. These faceted bubbles align themselves along (110) planes. Simultaneously, irradiation prompts tangled dislocations within the damaged layer, fostering the congregation of polygonal bubbles along GBs, along with the creation of denuded areas at ***, Fe2AlB2 demonstrates remarkable oxidation resistance under high-temperature irradiation, maintaining surface stability without the cracks seen in ion-irradiated Ti3SiC2 and Ti2AlC at room *** findings firmly establish Fe2AlB2 as a robust leader in nuclear materials science, showcasing outstanding irradiation resilience, encouraging further exploration for reactor applications operating below 500°C. © 2023, The Authors. All rights reserved.

关键词： Helium

来源：评论

学校读者我要写书评

暂无评论

The 110kV Live-Maintaining Robot control System Design for Substation Equipment in Complex Working Conditions 42

The 110kV Live-Maintaining Robot Control System Design for S...

引用

42nd Chinese control Conference, CCC 2023

作者： Hu, Chenyu Chen, Xin Li, Chengyu Huang, Guangxian Zhou, Cheng Jian, Xu School of Automation China University of Geosciences Wuhan430074 China Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Wuhan430074 China School of Future Technology China University of Geosciences Wuhan430074 China State Grid Hubei Electric Power Co. Ltd. Xianning Power Supply Company Distribution Department Xianning437000 China State Grid Hubei Electric Power Co. Ltd Operations and Maintenance Department Xianning xian'An District Power Supply Company Xianning437000 China Equipment Technology Center State Grid Hubei Electric Power Co. Ltd. Electric Power Science Research Institute Wuhan430077 China Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education Wuhan430074 China

ISBN: (纸本)9789887581543

Live-maintaining work is essential for continuous power supply to the substation. To improve the safety and efficiency of live-maintaining work, this paper proposes an equipotential live-maintaining robot system suitable for 110kV voltage levels. Considering the narrow space, complex working conditions and strong electromagnetic interference in substations, binocular vision technology, manipulator trajectory planning algorithm based on time-energy optimization, high voltage electromagnetic shielding technology are utilized to develop the system, and the live-maintaining robot is successfully applied in actual substation. By accurately identifying and locating the joint bolts and insulator, the robot system can achieve equipotential live-disassemble, live-assemble the joint bolts within 18 minutes and live-clean insulator within 5 minutes, demonstrating its the effectiveness and practicability. © 2023 Technical Committee on control Theory, Chinese Association of Automation.

关键词： Electromagnetic pulse

来源：评论

学校读者我要写书评

暂无评论

Facile Fabrication of Cobalt Doped Manganese Oxide with Hierarchical Porosity for Peroxymonosulfate Activation: Performance Investigation and Mechanistic Insight to Degrade Organic Pollutants in Water and Dft Study

SSRN

引用

SSRN 2022年

作者： Afzal, Shahzad Mehmood, Andleeb Jin, Lingyue Pan, Ke Ahmad, Munir Duan, Dandan Wei, Yang Raza, Waseem Hao, Tianwei Sharif, Hafiz Muhammad Adeel Sohail, Muhammad Chen, Fengyuan Shenzhen Key Laboratory of Marine Microbiome Engineering Institute for Advanced Study Shenzhen University Shenzhen518060 China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Optoelectronic Engineering Shenzhen University Shenzhen518060 China Department of Environmental Engineering China Jiliang University Zhejiang Hangzhou310018 China College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen518060 China College of Materials Science and Engineering Shenzhen University Shenzhen518060 China Ministry of Education Key Laboratory for Ecology of Tropical Islands College of Life Sciences Hainan Normal University Haikou571158 China Institute for Advanced Study Shenzhen University Shenzhen518060 China Department of Civil and Environmental Engineering Faculty of Science and Technology University of Macau China Research Center for Eco-Environmental Engineering Dongguan University of Technology Dongguan523808 China School of Electronic Science and Engineering State Key Laboratory of Electronic Thin Film and Integrated Devices University of Electronic Science and Technology of China Sichuan Chengdu610054 China

An economical and environment-friendly catalyst is needed for activating peroxymonosulfate (PMS) into reactive oxygen species (ROS). Cobalt-doped dumbbell-shaped MnO x was synthesized as a PMS-activator to abate organic pollutants in water. The microstructure contained nanoparticles that self-assembled into a maze-like dumbbell-shaped mesostructure. Phenol degradations after 9 min of Co18-MnO x /PMS, MnO x /PMS, Co 3 O 4 /PMS, PMS, and adsorption were 100%, 27%, 33%, 17%, and 5%, respectively. The Co18-MnO x morphology, microstructure, textural properties, and catalytic efficiency were well-retained after recycling. Compared to SO 4 •− and • OH, 1 O 2 and O 2 •− were the dominant ROS. The balance among redox couples (Co 2+ /Co 3+ , Mn 3+ /Mn 4+ , O 2− /O 2 ) and PMS decomposition enabled ROS production. The high catalytic efficiency was ascribed to the Mn/Co synergism, hierarchical microstructure, and ROS. Furthermore, the DFT study investigated the difference between the activation mechanism of PMS (adsorption and electron transfer) on MnOx and Co-MnOx surfaces. Our research devised a facile procedure to synthesize other transition metals doped MnO x for advanced oxidation processes and other applications. © 2022, The Authors. All rights reserved.

关键词： Manganese oxide

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：