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SSRN 2023年

作者： Huang, Kai Tian, Junlong Xu, Wenjie Zheng, Shuaizhi Key Laboratory of Low Dimensional Materials and Application Technology Ministry of Education School of Materials Science and Engineering Xiangtan University Xiangtan411105 China Hunan Key Laboratory of Micro-Nano Energy Materials and Devices Laboratory for Quantum Engineering and Micro-Nano Energy Technology School of Physics and Optoelectronic Xiangtan University Hunan Xiangtan411105 China Department of Electronic Science College of Big Data and Information Engineering Guizhou University Guiyang550025 China

Semiconductor photocatalytic technology is an effective way to remove antibiotic pollution. However, the recombination of photogenerated carriers limits the efficiency of photocatalytic degradation of antibiotic. In this work, a Bi4Ti3O12 (BTO) micro-hollow sphere (HS-BTO) was successfully self-assembled by BTO nano-sheet. In 7 min, the photodegradation efficiency of TC solution with an initial concentration of 10 mg/L is reached as high as 90 % at 2.6 °C, and the reaction rate constant (k) is up to 0.1775 min-1. With the increase of temperature up to 50 °C, 90 % of TC solution is photodegraded only in 1 min. This work reveals that heating can effectively reduce the charge transfer resistance, accelerate the charge transfer, thus promoting the charge separation and improving the photocatalytic performance. In addition, through ultrasound vibration, HS-BTO generates polarization charges and built-in polarization fields accelerating the photogenerated charge carriers separation and greatly suppressed the recombination rate of e-/h+ pairs, which achieved piezoelectric catalytic degradation of TC. Consequently, a developed photocatalytic degradation of tetracycline hydrochloride (TC) via coupling photothermal and piezoelectric effect is achieved. Thus, this work proposes an innovative approach to coupling thermal and mechanical energy to advance photocatalysis. © 2023, The Authors. All rights reserved.

关键词： Bismuth compounds

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Metasurface-integrated optofluidic sensing enabled by artificial vision intelligence for identifying liquid chemicals

Metasurface-integrated optofluidic sensing enabled by artifi...

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Conference on Lasers and Electro-Optics (CLEO)

作者： Hongliang Li Jin Tae Kim Jin-Soo Kim Duk-Yong Choi Sang-Shin Lee Department of Electronic Engineering Kwangwoon University Seoul South Korea Nano Device Application Center Kwangwoon University Seoul South Korea ICT Creative Research Laboratory Electronics and Telecommunications Research Institute Daejeon South Korea Department of Physics Nano Optics Laboratory Korea University Seoul South Korea Department of Quantum Science and Technology Research School of Physics Australian National University Canberra ACT Australia

The currently used liquid identification techniques are costly, cumbersome, and spectrometer-reliant. In this study, a compact, accurate, and cost-effective method for identifying liquids was presented using visual in... 详细信息

ISBN: (纸本)9781957171258

关键词： Absorption coefficient Image analysis Light beams Neural networks Refractive index Vortex beams

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Black holes in f(R) gravity coupled to nonlinear electromagnetic fields

arXiv

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arXiv 2024年

作者： Shi, Yongben Yang, Rong-Jia College of Physics Science and Technology Hebei University Baoding071002 China Hebei Key Lab of Optic-Electronic Information and Materials Hebei University Baoding071002 China National-Local Joint Engineering Laboratory of New Energy Photoelectric Devices Hebei University Baoding071002 China Key Laboratory of High-pricision Computation and Application of Quantum Field Theory of Hebei Province Hebei University Baoding071002 China

We establish a framework to construct spherically symmetric and static solutions in f(R) gravity coupled with nonlinear electromagnetic fields. We present two new specific solutions and discuss the energy conditions. We calculate some thermodynamic quantities of the obtained black holes like entropy and energy and investigate their thermodynamic topology. © 2024, CC BY-NC-SA.

关键词： Black holes

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Improved performance of Insight-HXMT/HE CsI detectors

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science China(physics,Mechanics & Astronomy) 2025年第7期Mechanics & Astronomy) .卷 108-120页

作者： Chao Zheng Shao-Lin Xiong Cheng-Kui Li Xiao-Bo Li Xu-Fang Li Gang Li Peng Zhang Wang-Chen Xue Yan-Qiu Zhang Cong-Zhan Liu Juan Zhang Bing Li Ming-Yu Ge Li-Ming Song Wen-Jun Tan Chen-Wei Wang Yue Wang Jin-Peng Wang Jia-Cong Liu Sheng-Lun Xie Ce Cai Shuo Xiao Wen-Long Zhang Hao-Xuan Guo Yu-Peng Xu Shu Zhang Shuang-Nan Zhang Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of Sciences University of Chinese Academy of Sciences College of Electronic and Information Engineering Tongji University Institute of Astrophysics Central China Normal University College of Physics and Hebei Key Laboratory of Photophysics Research and Application Hebei Normal University Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing Guizhou Normal University School of Physics and Electronic Science Guizhou Normal University School of Physics and Physical Engineering Qufu Normal University Department of Nuclear Science and Technology School of Energy and Power EngineeringXi'an Jiaotong University

As one of three primary scientific payloads of Insight-Hard X-ray Modulation Telescope（Insight-HXMT）,the High Energy Xray telescope（HE） consists of 18 Nal/CsI phoswich detectors,and the CsI detectors can detect gamma-rays that penetrate the satellite from all directions,with an energy range of about 60 keV to 3.2 MeV and a total geometric area of about 5100 *** characteristics make the CsI detectors suitable for monitoring GRBs and other high-energy *** calibration and performance studies of the CsI detectors' instrumental response were conducted during the early operation phase *** this work,we refine the cross-calibration of CsI detectors using a large sample of 85 bright *** analysis reveals that the effective area is inversely proportional to the incident angle（θ）,with no correlation observed with the azimuthal angle（θ）.We subsequently incorporated this relationship into the calibration database to correct for systematic biases in the initial ***,we demonstrate that joint spectral analyses incorporating CsI data provide better constraints on highenergy spectral parameters for most ***,we evaluate,for the first time,the energy response of CsI detectors for pointing observation by measuring the Crab Nebula using the Earth occultation *** effort extends the energy range of the Insight-HXMT telescope from 1-250 to 1-750 keV for pointing *** results show that the spectra measured by CsI detectors are consistent with other well-calibrated instruments,validating the reliability and accuracy of the CsI detectors' *** work will contribute to Insight-HXMT's capacity to generate more scientific outputs in the field of time-domain astronomy.

关键词： Crab Nebula cross-calibration CsI detectors gamma-ray bursts Insight-HXMT

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Kiselev Black holes in quantum fluctuation modified gravity

arXiv

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arXiv 2024年

作者： Hua, Yaobin Yang, Rong-Jia College of Physics Science and Technology Hebei University Baoding071002 China Hebei Key Lab of Optic-Electronic Information and Materials Hebei University Baoding071002 China National-Local Joint Engineering Laboratory of New Energy Photoelectric Devices Hebei University Baoding071002 China Key Laboratory of High-pricision Computation and Application of Quantum Field Theory of Hebei Province Hebei University Baoding071002 China

We obtain a new general solution for the gravitational field equations in quantum fluctuation modified gravity, which reduces to different classes of black holes surrounded by fluids, by taking some specific values of the parameter of the equation of state. We discuss the strong energy condition in a general way and also for some special cases of different fluids. In addition, the Hawking temperature associated to the horizons of solutions and constraints on the parameter characterizing the fluctuation of metric are taken into account in our analysis. © 2024, CC BY-NC-SA.

关键词： Black holes

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Superb Microplastics Separation Performance of Graphene Oxide Tuned by Laser Bombardment

SSRN

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SSRN 2023年

作者： Sun, Jiawei Xiong, Yuwei Bi, Hengchang Sun, Yunfei Yin, Kuibo Jia, Haiyang Han, Longxiang College of Electronic and Information Engineering Suzhou University of Science and Technology Suzhou215009 China SEU-FEI Nano-Pico Center Key Laboratory of MEMS of Ministry of Education Southeast University Nanjing210096 China School of Physics and New Energy Xuzhou University of Technology Xuzhou221018 China Jiangsu Industrial Intelligent and Low-carbon Technology Engineering Center Suzhou215000 China Suzhou Key Laboratory of Intelligent Low-carbon Technology Application Suzhou215000 China

Microplastics (MPs) have been identified as a significant environmental threat to aquatic ecosystems and human health. Consequently, there is an urgent need for efficient separation methods for small-sized MPs. In this study, a super-hydrophilic GO membrane is successfully prepared by facilely depositing GO on a microfiltration substrate, without introducing any surface modification materials, especially nanoparticles, which may cause secondary pollution. Laser bombardment reduces the size of the GO lamella (23.6% of its original size) and creates an abundance of defects and undulating wrinkles, enabling the deposited GO membrane to have more and shorter pathways for water. As a result, the filtration flux for 10 μm polyvinyl chloride (PVC) reaches up to 3396 L m−2 h−1 bar−1, a 1~2-order-of-magnitude enhancement compared to the unirradiated GO membrane, and is also superior to most nanoparticle-modified GO membranes. Simultaneously, the labyrinth structure endows the membrane with a high filtration efficiency of approximately 99% for the majority of MPs. This excellent performance remains virtually unchanged after repeated use. The integration of outstanding separation effects and health safety presents opportunities for practical applications in long-term MP-in-water separation. © 2023, The Authors. All rights reserved.

关键词： Aquatic ecosystems

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All-Inorganic Perovskite Nitio3/Cs3sb2i9 Heterostructure for Photocatalytic Co2 Reduction to Ch4 with High Selectivity

SSRN

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SSRN 2023年

作者： Fan, Shuhan Yang, Qu Yin, Guilin Qi, Xiaosi Feng, Yuyu Ding, Junfei Peng, Qiong Qu, Yunpeng Wang, Qinglong Shen, Yan Wang, Mingkui Gong, Xiu College of Physics Guizhou Province Key Laboratory for Optoelectronic Technology and Application Guizhou University Guiyang550025 China State Key Laboratory of Public Big Data Guizhou University China State Key Laboratory of Catalysis Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian116023 China Wuhan National Laboratory for Optoelectronics School of Optical and Electronic Information Huazhong University of Science and Technology Hubei Wuhan430074 China

Developing efficient and stable halide perovskite-based photocatalysts for highly selectivity reduction CO2 to valuable fuels remains a significant challenge due to their intrinsic instability. Herein, we construct a novel heterostructure featuring 2D Cs3Sb2I9 nanosheets on a 3D flower-like mesoporous NiTiO3 framework using a top-down stepwise membrane fabrication technique. The unique bilayer heterostructure formed on the 3D mesoporous framework endowed NiTiO3/Cs3Sb2I9 with sufficient and close interface contact, minimizing charge transport distance, and effectively promoting the charge transfer at the interface, thus improving the reaction efficiency of the catalyst surface. As revealed by characterization and calculation, the coupling of Cs3Sb2I9 with NiTiO3 facilitates the hydrogenation process during catalytic, directing reaction intermediates toward highly selective CH4 production. Furthermore, the van der Waals forces inherent in the 3D/2D heterostructure with face-to-face contact provide superior stability, ensuring the efficient realization of photocatalytic CO2 reduction to CH4. Consequently, the optimized 3D/2D NiTiO3/Cs3Sb2I9 heterostructure demonstrates an impressive CH4 yield of 43.4 µmol g-1 h-1 with a selectivity of up to 88.6%, surpassing most reported perovskite-based photocatalysts to date. This investigation contributes to overcoming the challenges of commercializing perovskite-based photocatalysts and paves the way for the development of sustainable and efficient CO2 conversion technologies. © 2023, The Authors. All rights reserved.

关键词： Antimony compounds

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Designing N-RGO and CNFs co-decorated NiS2 for high-efficiency hybrid supercapacitors with excellent energy density and cycling stability

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Journal of Energy Storage 2025年 113卷

作者： Li, Zhikun Zhang, Weiyang Li, Xiaona Li, Yanchun Kang, Hongwei Li, Zijiong Yang, Baocheng Henan Key Laboratory of Nanocomposite and Application Zhengzhou City Key Laboratory of Supercapacitor Institute of Nanostructured Functional Materials Huanghe Science and Technology College Zhengzhou450006 China School of Chemistry and Materials Engineering Engineering Research Center of Biomass Conversion and Pollution Prevention of Anhui Educational Institutions Fuyang Normal University Fuyang236037 China Key Laboratory of Magnetoelectronic Information Functional Materials of Henan Province School of Physics & Electronic Engineering Zhengzhou University of Light Industry Zhengzhou450002 China

Nickel disulfide (NiS2), due to its abundant redox active sites, high theoretical specific capacity and abundant resources, is a promising high-performance energy storage electrode material in the transition metal sulfide family. However, its poor high-current charging/discharging ability and cycling stability have seriously restricted its development and application. Herein, we have innovatively designed and synthesized a novel nanohybrid of N-doped functionalized reduced graphene oxide (N-RGO) and carbon nanofibers (CNFs) co-decorated with NiS2 nanoparticles by hydrothermal method, denoted as N-RGO/CNFs/NiS2. Two-dimensional N-RGO nanosheets synergizes with one-dimensional CNFs, both with high conductivity, to construct stable hierarchical porous network nanostructures, which not only facilitates the charge transport/ion diffusion kinetics, but also provides buffer space for the rapid insertion/extraction of ions, leading to enhanced rate capability and cycling stability. Simultaneously, the two carbon materials with high specific surface area promote better dispersion of NiS2 nanoparticles and provide abundant exposed electroactive sites, which are favorable for taking advantage of the high capacity of NiS2. Consequently, the developed N-RGO/CNFs/NiS2 nanohybrids as electrodes exhibit a high specific capacity of 227.5 mAh g−1 at 0.8 A g−1 and improved rate capability (58.6 %, 0.8 to 30 A g−1). Even more fascinatingly, the assembled N-RGO/CNFs/NiS2//AC aqueous hybrid supercapacitor (AHSC) delivers an excellent energy density of 55.0 Wh kg−1 (at 738.2 W kg−1) and ultra-long durability with 95.26 % capacity retention after 26,000 cycles, which indicates its fascinating application feasibility in new high-performance energy storage devices with low-cost and high-safety. © 2025 Elsevier Ltd

关键词： Supercapacitor

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Baryogenesis in quantum fluctuation modified gravity

arXiv

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arXiv 2024年

作者： Yang, Rong-Jia Shi, Yong-Ben College of Physics Science and Technology Hebei University Baoding071002 China Hebei Key Lab of Optic-Electronic Information and Materials Hebei University Baoding071002 China National-Local Joint Engineering Laboratory of New Energy Photoelectric Devices Hebei University Baoding071002 China Key Laboratory of High-pricision Computation and Application of Quantum Field Theory of Hebei Province Hebei University Baoding071002 China

We consider baryogenesis in quantum fluctuation modified gravity. We explore three forms (two are newly proposed here) of baryogenesis interaction and discuss the effect of these interaction terms on the baryon-to-entropy ratio during the radiation era of the expanding universe. We constrain the model parameters with the current observational data, implying that this modified gravity is capable to address the issue of baryon asymmetry in a successful manner. © 2024, CC BY-NC-SA.

关键词： Radiation effects

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Sliding Flexoelectricity in Two-Dimensional van der Waals Systems

arXiv

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arXiv 2024年

作者： He, Ri Wang, Hua Deng, Fenglin Gao, Yuxiang Zhang, Binwen Shi, Yubai Li, Run-Wei Zhong, Zhicheng Key Laboratory of Magnetic Materials Devices Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo315201 China Center for Quantum Matter School of Physics Zhejiang University Hangzhou310058 China Suzhou Institute for Advanced Research University of Science and Technology of China Suzhou215123 China Fujian Key Laboratory of Functional Marine Sensing Materials Center for Advanced Marine Materials and Smart Sensors College of Material and Chemical Engineering Minjiang University Fuzhou350108 China College of Materials Science and Opto-Electronic Technology University of Chinese Academy of Sciences Beijing100049 China School of Future Technology University of Chinese Academy of Sciences Beijing100049 China School of Artificial Intelligence and Data Science University of Science and Technology of China Suzhou215123 China

Two-dimensional sliding ferroelectrics, with their unique stacking degrees of freedom, offer a different approach to manipulate polarization by interlayer sliding. Bending sliding ferroelectrics inevitably leads to interlayer sliding motion, thus altering stacking orders and polarization properties. Here, by using machine-learning force field, we investigate the effects of bending deformation on geometries, stackings, energies, and polarizations in sliding ferroelectric bilayer h-BN and 3R-MoS2. We predict that bent ferroelectric bilayer forms irreversible kinks instead of arc when the bending angle exceeds a critical value. We demonstrate that the kinks originate from the competition between bending energy and interlayer van der Waals energy. The kink contains a ferroelectric domain wall that reverses the polarization, effectively inducing a flexoelectric effect. We term this phenomenon "sliding flexoelectricity" to distinguish it from conventional strain-gradient-induced flexoelectricity. Copyright © 2024, The Authors. All rights reserved.

关键词： Van der Waals forces

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