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Constructing 2D bismuth-based heterostructure for highly efficient photocatalytic CO2 reduction

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Tungsten 2025年第1期7卷 71-79页

作者： Ruo-Hang Xu Hao-Yu Jiang Dan-Dan Cui Kun-Rong Du Hong-Run Zhang Sheng-Jie Xu Ya-Qi Li Zhi-Zhen Ren Liang Wang Wei-Chang Hao Yi Du School of Physics and BUAA-UOW Joint Research centre Beihang University Shenzhen Institute of Beihang University centre for Catalysis and Clean Energy School of Environment and Science Griffith University

Reforming carbon dioxide（CO2） into fuels and valuable chemicals using solar energy holds significant potential for emission reduction and addressing energy supply *** recombination of photocarriers remains a major obstacle,however,to enhancing solar energy conversion efficiency in the photocatalytic reaction *** two-dimensional materials,constructing heterogeneous structures has emerged as an effective strategy to enhance the separation of photoexcited carriers by leveraging the internal electric field at the heterogeneous ***,we present a facile strategy for preparing Bi4NbO8Br/Bi2WO6plate-on-plate Z-scheme junctions with a strong internal electric field by in situ *** unique heterostructure facilitates efficient separation and transport of photoexcited charges by harnessing the internal electric field induced by chemical bonding at the lateral ***,the Bi4NbO8Br/Bi2WO6heterostructure exhibits enhanced CO2photoreduction properties,along with a CO yield rate of approximately 35 μmol·g-1·h-1under full light *** work offers novel insights into the synthesis of unique hetero structures intended to enhance the efficiency of photocatalytic CO2reduction.

关键词： Bi4NbO8Br/Bi2WO6 CO2 reduction Heterostructures Photocatalysts

1 T moderate intensity static magnetic field affects Akt/mTOR pathway and increases the antitumor efficacy of m TOR inhibitors in CNE-2Z cells

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Science Bulletin 2015年第24期60卷 2120-2128页

作者： Lei Zhang Xingxing Yang Juanjuan Liu Yan Luo Zhiyuan Li Xinmiao Ji Wenchao Wang Xin Zhang high Magnetic field Laboratory Chinese Academy of Sciences University of Science and Technology of China

Static magnetic field （SMF） has been known to affect cell proliferation in a cell-type-dependent manner, while the mechanism still remains unclear. We found that 1 T moderate intensity SMF inhibits cell proliferation of nasopharyngeal carcinoma CNE-2Z cells and the Akt/ mTOR signaling pathway, which is upregulated in many cancers, roTOR inhibitors are potential chemodrugs, but their clinical effects are limited by the feedback reactiva- tion of other signaling components such as EGFR and Akt. We showed that 1 T SMF increases the antitumor efficacy of mTOR inhibitor Torin 2. In addition, 1 T SMF increases the inhibition efficiency on roTOR substrates phosphorylation and represses the mTOR inhibitor-induced feedback reactivation of EGFR and Akt. Our study not only demonstrates that mTOR/Akt pathway is one of the molecular targets of SMFs in cells, but also reveals the clinical potentials of combinations of roTOR inhibitors and SMFs in cancer treatment.

关键词： Static magnetic field - Cell proliferationmTOR mTOR inhibitor - Feedback reactivation

Bimetallic Single‑Atom Catalysts for Water Splitting

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Nano-Micro Letters 2025年第1期17卷 1-45页

作者： Megha A.Deshmukh Aristides Bakandritsos Radek Zbořil Nanotechnology centre Centre for Energy and Environmental TechnologiesVŠB–Technical University of Ostrava17.listopadu 2172/1570800 Ostrava‑PorubaCzech Republic Regional centre of Advanced Technologies and Materials Czech Advanced Technology and Research Institute(CATRIN)Palacky University OlomoucŠlechtitelů241/2778371 Olomouc–HoliceCzech Republic

Green hydrogen from water splitting has emerged as a critical energy vector with the potential to spearhead the global transition to a fossil fuel-independent *** field of catalysis has been revolutionized by single-atom catalysts(SACs),which exhibit unique and intricate interactions between atomically dispersed metal atoms and their ***,bimetallic SACs(bimSACs)have garnered significant attention for leveraging the synergistic functions of two metal ions coordinated on appropriately designed *** offer an avenue for rich metal–metal and metal–support cooperativity,potentially addressing current limitations of SACs in effectively furnishing transformations which involve synchronous proton–electron exchanges,substrate activation with reversible redox cycles,simultaneous multi-electron transfer,regulation of spin states,tuning of electronic properties,and cyclic transition states with low activation *** review aims to encapsulate the growing advancements in bimSACs,with an emphasis on their pivotal role in hydrogen generation via water *** subsequently delve into advanced experimental methodologies for the elaborate characterization of SACs,elucidate their electronic properties,and discuss their local coordination ***,we present comprehensive discussion on the deployment of bimSACs in both hydrogen evolution reaction and oxygen evolution reaction,the two half-reactions of the water electrolysis process.

关键词： Single-atom catalysts Single-atom dimers Hydrogen evolution Oxygen evolution Water splitting

Control of high-order harmonic generation with two-colour laser field

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Chinese Physics B 2010年第11期19卷 275-279页

作者：戴君曾志男李儒新徐至展 State Key Laboratory of high field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of Sciences

We numerically investigate the high-order harmonic generation with two-colour optical field, taking into consideration the propagation effects. Some harmonics can be dramatically enhanced at a certain delay between the fundamental pulse and its second harmonics. Choice of the enhanced harmonics can be realised by changing the time delay between the two laser pulses.

关键词： high-order harmonic two-colour laser field Lewenstein model

Phase evolution of the reemitted field in the semiconductor quantum wells under the femtosecond pulse train intersubband excitation

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Chinese Optics Letters 2007年第5期5卷 304-307页

作者：罗建龚尚庆钮月萍宋晓虹钱军李儒新 State Key Laboratory of high field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of Sciences

Property of the phase of the reemitted field in the semiconductor quantum wells （QWs） excited by fem-tosecond pulse train is investigated. It is shown that the phase evolution of the reemitted field is controlled by the relative phase between the successive pulses of the incident train. For all the odd pulses excitation, the reemitted field is from out-of-phase to in-phase, then again to out-of-phase with the incident pulses, whereas for all the even pulses excitation, the situation is the opposite, i.e., it is from in-phase to out-of-phase, then again to in-phase with the incident pulses.

关键词： Ultrashort pulses

A new shunt DC active filter of power supply in a steady high magnetic field facility

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Chinese Physics C 2011年第5期35卷 494-499页

作者：王磊刘小宁王灿 School of Electrical Engineering and Automation Hefei University of Technology high Magnetic field Laboratory Chinese Academy of Sciences

A DC active power filter is an indispensable part in a high power and high stability power supply system, especially in the power supply system of the Steady high Magnetic field Facility, which requires that the current ripple should be limited to 50 parts per million. In view of the disadvantages of the series DC active power filter and shunt Pulse Width Modulation DC active filter, this paper puts forward a novel DC active filter by combining the advantages of the transistor regulator and the shunt type. The structure and principle of the new shunt linear active filter are introduced. Meanwhile, the design of several key components that construct the new shunt linear active filter is also analyzed. The simulation model and an experimental prototype of the shunt linear active filter are developed, and the results verify that the parameter design is reasonable and the shunt active filter has a good filter effect.

关键词： high stable power supply ripple shunt linear DC active filter

Simulation of Far-field Superresolution Fluorescence Imaging with Two-Color One-Photon Excitation of Reversible Photoactivatable Protein

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Chinese Physics Letters 2011年第5期28卷 136-139页

作者： WANG Chen QIAO Ling-Ling MAO Zheng-Le State Key Laboratory of high field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800

We propose to achieve far-field super-resolution imaging by using offset two-color one-photon(2C1P)excitation of reversible photoactivatable fluorescence *** to the distinctive photoswitching performance of the proteins,such as dronpa,the fluorescence emission will only come from the overlapped region of activation beam and excitation *** analysis solution of rate equation shows that the resolution of offset 2C1P microscope is"engineered"by laser power of excitation and activation beams and the power ratio between *** lateral and transverse resolution is theoretically demonstrated compared with conventional fluorescence scanning microscopy.

关键词： excitation activation resolution

Spectroscopic analysis of high electric field enhanced ionization in laser filaments in air for corona guiding

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high Power Laser Science and Engineering 2016年第1期4卷 52-57页

作者： Yingxia Wei Yaoxiang Liu Tie-Jun Wang Na Chen Jingjing Ju Yonghong Liu Haiyi Sun Cheng Wang Jiansheng Liu Haihe Lu See Leang Chin Ruxin Li State Key Laboratory of high field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of Sciences centre d’Optique Photonique et Laser (COPL) and Dpartement de physiquede gnie physique et d’optiqueUniversit Laval

We report on a systematic experimental study on the fluorescence spectra produced from a femtosecond laser filament in air under a high electric field. The electric field alone was strong enough to create corona discharge(CD). Fluorescence spectra from neutral and ionic air molecules were measured and compared with pure high-voltage CD and pure laser filamentation(FIL). Among them, high electric field assisted laser FIL produced nitrogen fluorescence more efficiently than either pure CD or pure FIL processes. The nonlinear enhancement of fluorescence from the interaction of the laser filament and corona discharging electric field resulted in a more efficient ionization along the laser filament zone, which was confirmed by the spectroscopic measurement of both ionization-induced fluorescence and plasma-scattered 800 nm laser pulses. This is believed to be the key precursor process for filament-guided discharge.

关键词： femtosecond laser filamentation filament induced fluorescence spectroscopy laser guided discharges

Tunneling-induced π-phase shift with a single-photon signal field in asymmetric double quantum wells

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Chinese Optics Letters 2009年第10期7卷 886-890页

作者：郭洪菊汪丽春钮月萍金石琦龚尚庆 State Key Laboratory of high field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of Sciences Graduate University of Chinese Academy of Sciences

A theoretical investigation is carried out into the cross phase modulation （XPM） in an asymmetric double A1GaAs/GaAs quantum wells structure with a common continuum. It is found that, combining resonant tunneling-induced transparency and constructive interference in the third-order Kerr effect, a giant XPM can be achieved with vanishing linear and nonlinear absorptions, accompanied by the velocities of the probe and signal fields being matched. Furthermore, this giant XPM could induce a π-phase shift at a single-photon level which is favorable for the applications in two-qubit quantum logic gates.

关键词： Kerr magnetooptical effect Magnetic field effects Particle beams Phase shift Photons Quantum theory Wind tunnels