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Floquet topological phase transition in two-dimensional quadratic band crossing system

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Chinese Physics B 2021年第6期30卷 521-525页

作者： Guo-Bao Zhu hui-min yang School of Physics and Electronic Engineering Heze UniversityHeze 274015China

We investigate the Hall effects of quadratic band crossing(QBC) fermions in a square optical lattice with spin–orbit coupling and orbital Zeeman term. We find that the orbital Zeeman term and shaking play critical roles in the systems,which can drive a topological transition from spin Hall phases to anomalous Hall phase with nonvanishing(spin) Chern numbers. Due to the interplay among the orbital Zeeman term, spin–orbit coupling, and the shaking, the phase diagram of the system exhibits rich phases, which are characterized by Chern number.

关键词： shaking quadratic band crossing orbital

Regulation Mechanisms of Stomatal Oscillation

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Journal of Integrative Plant Biology 2005年第10期47卷 1159-1172页

作者： hui-min yang Jian-Hua ZHANG Xiao-Yan ZHANG Department of Biology Hong Kong Baptist University Hong Kong SAR China School of Pastoral Agriculture Science and Technology Lanzhou University Gansu Grassland Ecological Research Institute Lanzhou 730020 Chin

Stomata function as the gates between the plant and the atmospheric environment. Stomatal movement, including stomatal opening and closing, controls CO2 absorption as the raw material for photosynthesis and water loss through transpiration. How to reduce water loss and maintain enough CO2 absorption has been an interesting research topic for some time. Simple stomatal opening may elevate CO2 absorption, but, in the meantime, promote the water loss, whereas simple closing of stomatal pores may reduce both water loss and CO2 absorption, resulting in impairment of plant photosynthesis. Both processes are not economical to the plant. As a special rhythmic stomatal movement that usually occurs at smaller stomatal apertures, stomatal oscillation can keep CO2 absorption at a sufficient level and reduce water loss at the same time, suggesting a potential improvement in water use efficiency. Stomatal oscillation is usually found after a sudden change in one environmental factor in relatively constant environments. Many environmental stimuli can induce stomatal oscillation. It appears that, at the physiological level, feedback controls are involved in stomatal oscillation. At the cellular level, possibly two different patterns exist：（i） a quicker responsive pattern; and （ii） a slower response. Both involve water potential changes and water channel regulation, but the mechanisms of regulation of the two patterns are different. Some evidence suggests that the regulation of water channels may play a vital and primary role in stomatal oscillation. The present review summarizes studies on stomatal oscillation and concludes with some discussion regarding the mechanisms of regulation of stomatal oscillation.

关键词： Ca^2+ signaling guard cell plant stress signaling plant water relation stomatal oscillation water channel.

Performance of Ag_(2)O/Ag Electrode as Cathodic Electron Acceptor in Microbial Fuel Cell

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Acta Metallurgica Sinica(English Letters) 2017年第12期30卷 1243-1248页

作者： Hong-Yan Dai hui-min yang Xuan Jian Xian Liu Zhen-Hai Liang College of Chemistry and Chemical Engineering Taiyuan University of Technology Department of Municipal and Environmental Engineering Taiyuan College Department of Chemistry Taiyuan Normal University

An Ag2O/Ag electrode was prepared through the electrochemical oxidation of sterling silver. This electrode was used as a cathodic electron acceptor in a microbial fuel cell （MFC）. The Ag2O/Ag electrode was characterized by scanning electron microscopy, X-ray powder diffraction and linear sweep voltammetry. The maximum voltage output of the MFC with the AgaO/Ag cathode was maintained at between 0.47 and 0.5 V in 100 cycles, indicating the good regenerative capacity of the Ag2O/Ag electrode. The overpotential loss for silver oxide was 0.021-0.006 V, and the maximum power output, open circuit potential and short circuit current of the MFC were 1.796 W m^-3, 0.559 V and 9.3375 A m^-3, respectively. The energy required for electrochemical reoxidation ranged from 40% to 55% of the energy produced by the MFC. Results indicated that the AgeO/Ag electrode could be used as a cathodic electron acceptor in MFCs with excellent stability.

关键词： Ag2O/Ag electrode Cathodic electron acceptor Microbial fuel cell Regenerative capacity Overpotential loss Stability

Electricity Production in Microbial Fuel Cell Subjected to Different Operational Modes

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Acta Metallurgica Sinica(English Letters) 2016年第5期29卷 483-490页

作者： Hong-Yan Dai hui-min yang Xian Liu Xuan Jian Zhen-Hai Liang College of Chemistry and Chemical Engineering Taiyuan University of Technology Department of Environmental Engineering Taiyuan College

The effects of inoculum species, substrate concentration, temperature, and cathodic electron acceptors on electricity production of microbial fuel cells （MFCs） were investigated in terms of start-up time and power output. When inoculated with aeration tank sludge, this MFC outperformed the cell that was inoculated with anaerobic sludge in terms of start-up time and power output. After running for a certain time period, the dominant populations of the two MFCs varied significantly. Within the tested range of substrate concentration （200-1800 mg L-l）, the voltage output increased and the time span of the electricity generation lengthened with increasing substrate concentration. As the temperature declined from 35 to 10 ℃, the maximum power density reduced from 2.229 to 1.620 W m-3, and anodic polarization resistance correspondingly dropped from 118 to 98 Ω. The voltage output of MFC-Cu2＋ was 0.447 V, which is slightly lower than that achieved with MFC-[Fe（CN）6]3- （0.492 V）, thereby indicating that MFCs could be used to treat wastewater con- taining Cu2＋ pollutant in the cathode chamber with removal of organics in anode chamber and simultaneous electricity generation.

关键词： Microbial fuel cells Inoculum species Cathodic electron acceptors Electricity production

Water Channels Are Involved in Stomatal Oscillations Encoded by Parameter-Specific Cytosolic Calcium Oscillations

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Journal of Integrative Plant Biology 2006年第7期48卷 790-799页

作者： hui-min yang Xiao-Yan Zhang Gen-Xuan Wang Jian-Hua Zhang Key Laboratory of Grassland Agro-Ecosystems of ministry of Agriculture School of Pastoral Agriculture Science and Technology Lanzhou University Lanzhou 730020 China College of Life Sciences Zhejiang University Hangzhou 310027 China Department of Biology Hong Kong Baptist University Hong Kong SAR China

Earlier studies have shown that various stimuli can induce specific cytosolic calcium （[Ca^2＋]cyt） oscillations in guard cells and various oscillations in stomatal apertures. Exactly how [Ca^2＋]cyt oscillation signaling functions in stomatal oscillation is not known. In the present study, the epidermis of broad bean （Vicia faba L.） was used and a rapid ion-exchange treatment with two shifting buffers differing in K^＋ and Ca^2＋ concentrations was applied. The treatment for fivetransients at a 10-min transient period induced clear and regular stomatal oscillation. However, for other transient numbers and periods, the treatments induced some Irregular oscillations or even no obvious oscillations in stomatal aperture. The results indicate that stomatal oscillation Is encoded by parameter-specific [Ca^2＋]cyt oscillation： the parameters of [Ca^2＋]cyt oscillation affected the occurrence rate and the parameters of stomatal oscillation. The water channel inhibitor HgCl2 completely Inhibited stomatal oscillation and the inhibitory effect could be partially reversed by β-mercaptoethanol （an agent capable of reversing water channel inhibition by HgCl2）. Other Inhibitory treatments against Ion transport （i.e. the application of LaCIs, EGTA, or tetraethylammonlum chloride （TEACI）） weakly impaired stomatal oscillation when the compounds were added after rapid ion-exchange treatment. If these compounds were added before rapid-ion exchange treatment, the inhibitory effect was much more apparent （except In the case of TEACI）. The results of the present study suggest that water channels are involved In stomatal oscillation as a downstream element of [Ca^2＋]cyt oscillation signaling.

关键词： broad bean cytosolic calcium ([Ca^2+]cyt) oscillation stomatal oscillation water channel.

Hydrogen Production Using ‘‘Direct-Starting” Biocathode Microbial Electrolysis Cell and the Analysis of Microbial Communities

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Acta Metallurgica Sinica(English Letters) 2019年第3期32卷 297-304页

作者： Hong-Yan Dai hui-min yang Xian Liu Xiu-Li Song Zhen-Hai Liang Department of Municipal and Environmental Engineering Taiyuan College College of Chemistry and Chemical Engineering Taiyuan University of Technology Department of Chemistry Taiyuan Normal University

In this study, a ‘‘direct-starting'' procedure was used to activate a single-chamber biocathode microbial electrolysis cell(MEC) and the development of a biocathode was studied through output current curves and cyclic voltammograms. It only took 163 h for a successful start-up, and a current density of 14.75 A/m^2 was obtained. In the formal hydrogen-production stage, it was found that the biocathode MEC was comparable with the Pt/C cathode MEC in terms of current density and energy efficiency, and the hydrogen recovery, cathodic hydrogen recovery, and hydrogen production rate of the biocathode MEC were 71.22% ± 8.98%, 79.42% ± 5.94%, and 0.428 ± 0.054 m^3 H_2/m^3 days, respectively, which were slightly higher than those obtained with the Pt/C cathode MEC. Besides, under the effect of applied voltage, the microbial populations in the anodophilic biofilm of MEC(MECan) and the cathodophilic biofilm of MEC(MECca) were less diverse than those of the original aerobic activated sludge(AAS) and the anodophilic biofilm of MEC(MECan). Furthermore, the microbial community structures evidently differed between MECan/MECca and AAS/MFC.

关键词： “Direct-starting” procedure Biocathode Hydrogen production Microbial community structures

Nonlinear photoncurrent in transition metal dichalcogenide with warping term under illuminating of light

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Chinese Physics B 2021年第3期30卷 436-440页

作者： Guo-Bao Zhu hui-min yang Yun-Hai Zhang School of Physics and Electronic Engineering Heze UniversityHeze 274015China

We investigate the photoconductivities of injection current and the shift current in transition metal dichalcogenide with warping term in the presence of sublattice potential and spin orbit *** system shows the valley photoconductivities of injection current and the photoconductivities of shift *** is found that the warping term and the geometric tensor play a critical role in the system,which are responsible for the *** to the interplay between the sublattice potential and the spin orbit coupling,the photoconductivities can be ***,the effect of warping term on geometric tensor and the amplitude of the photoconductivities are also discussed.

关键词： photoconductivity transition metal dichalcogenide warping term

Synergistically enhanced activity and stability of bifunctional nickel phosphide/sulfide heterointerface electrodes for direct alkaline seawater electrolysis

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Journal of Energy Chemistry 2022年第12期75卷 66-73,I0003页

作者： Hao-Yu Wang Jin-Tao Ren Lei Wang ming-Lei Sun hui-min yang Xian-Wei Lv Zhong-Yong Yuan School of Materials Science and Engineering Nankai UniversityTianjin 300350China Key Laboratory of Advanced Energy Materials Chemistry(ministry of Education) Nankai UniversityTianjin 300071China

Direct electrolysis of seawater to generate hydrogen is an attractive but challenging renewable energy storage *** design of seawater electrolysis catalysts should integrate high activity for hydrogen evolution reaction(HER)/oxygen evolution reaction(OER)and enhanced physical/electrochemical stability in ***,we demonstrate the development of a Ni foam(NF)supported interfacial heterogeneous nickel phosphide/sulfide(Ni_(2)P/NiS_(2))microsphere electrocatalyst(NiPS/NF)through a facile electrodeposition and subsequent phosphorization/sulfuration *** NiS_(2)modification,a charge redistribution on the heterointerface is demonstrated and a more advantageous covalent nature of the Ni-P bond is obtained for more easily adsorption of H*and H_(2)*** NiPS/NF thus yields an impressive electrocatalytic performance in 1.0 M KOH,requiring small overpotentials of 169 and 320 mV for HER and OER to obtain a high current density of 100 m A cm^(-2),*** NiPS/NF can also work efficiently in alkaline seawater with negligible activity degradation,requiring overpotentials of only 188 and 344 mV for a current density of 100 m A cm^(-2)for HER and OER,respectively.A synergistically enhanced physical/electrochemical long-term stability NiPS/NF in saline water is also demonstrated.

关键词： Seawater electrolysis Hydrogen production Bifunctional electrocatalyst Heterostructure Anticorrosion

Facile fabrication of nanoscale hierarchical porous zeolitic imidazolate frameworks for enhanced toluene adsorption capacity

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Rare Metals 2021年第2期40卷 471-477页

作者： min-hui yang Chong-Xiong Duan Xin-Juan Zeng Jing-Jing Li Cui-Yin Liu Long-Jiao Zeng Yi Zhang Kai Wang Hong-Xia Xi School of Materials Science and Hydrogen Energy Foshan UniversityFoshan528231China School of Chemistry and Chemical Engineering South China University of TechnologyGuangzhou510640China School of Energy Sciences and Engineering Nanjing Tech UniversityNanjing211816China School of Electrical Engineering Qingdao UniversityQingdao266061China

The development of a simple and facile synthesis route is a highly desirable but challenging process in the fabrication of nanoscale hierarchical porous zeolitic imidazolate frameworks(ZIFs).Herein we describe a facile method for rapidly synthesizing hierarchically porous ZIF-90 nanocrystals(particle sizes of~300 nm)using hydroxyl double salts as intermediates at room *** as-synthesized ZIF-90 contained hierarchical porous structures developed using a crystalline interior and a random stack of multiple *** the morphology and particle size of ZIF-90 nanocrystals could be tuned by controlling the molar ratio of ICA/Zn^(2+).Note that the as-synthesized hierarchically porous ZIF-90 nanocrystals exhibited higher thermal stability compared with the conventional *** of the introduction of hierarchical porous structures,the resultant hierarchically porous ZIF-90 nanocrystals showed enhanced toluene adsorption capacity than those of conventional metal organic frameworks and zeolites.

关键词： Zeolitic imidazolate framework-90 Nanoscale Green and rapid synthesis Hierarchical porous structure Enhanced toluene adsorption