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Edge reconstruction of layer-dependentβ-In2Se3/MoS2 vertical heterostructures for accelerated hydrogen evolution

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Nano Research 2023年第1期16卷 1670-1678页

作者： Gonglei Shao Meiqing Yang Haiyan Xiang song Luo Xiong-Xiong Xue Huimin Li Xu Zhang song liu Zhen Zhou Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education School of Chemical EngineeringZhengzhou UniversityZhengzhou 450001China Institute of Chemical Biology and Nanomedicine(ICBN) State Key Laboratory of Chemo/Biosensing and ChemometricsCollege of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China College of Life and Environmental Science Hunan University of Arts and ScienceChangde 415000China School of Physics and Optoelectronics Xiangtan UniversityXiangtan 411105China Institute of New Energy Material Chemistry School of Materials Science and EngineeringNankai UniversityTianjin 300350China

The layer-dependent properties are still unclarified in two-dimensional(2D)vertical *** this study,we layer-bylayer deposited semimetalβ-In2Se3 on monolayer MoS2 to form verticalβ-In2Se3/MoS2 heterostructures by chemical vapor *** defect-mediated nucleation mechanism inducesβ-In2Se3 nanosheets to grow on monolayer MoS2,and the layer number of stackedβ-In2Se3 can be precisely regulated from 1 layer(L)to 13 L by prolonging the growth ***β-In2Se3/MoS2 heterostructures reveal tunable type-Ⅱband alignment arrangement by altering the layer number ofβ-In2Se3,which optimizes the internal electron ***,the edge atomic structure ofβ-In2Se3 stacking on monolayer MoS2 shows the reconstruction derived from large lattice mismatch(~29%),and the presence ofβ-In2Se3 also further increases the electrical conductivity ofβ-In2Se3/MoS2 *** to abundant layer-dependent edge active sites,edge reconstruction,improved hydrophilicity,and high electrical conductivity ofβ-In2Se3/MoS2 heterostructures,the edge ofβ-In2Se3/MoS2 heterostructures exhibits excellent electrocatalytic hydrogen evolution *** onset potential and smaller Tafel slope can be observed at the edge of monolayer MoS2 coupled with 13-Lβ-***,the outstanding conductive layers coupled with edge reconstruction in 2D vertical heterostructures play decisive roles in the optimization of electron energy levels and improvement of layer-dependent catalytic performance.

关键词： In2Se3/MoS2 heterostructure edge reconstruction layer dependent hydrogen evolution reaction microreactor

Improving cleanliness of 30Cr2Ni4MoV low-pressure rotor steel by CaO-SiO_(2)-MgO-Al_(2)O_(3) slag refining

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Journal of Iron and Steel Research International 2022年第9期29卷 1434-1445页

作者： Yong-bo Peng Cheng-song liu Ling Yang song-wei Hou Ri-jin Cheng Hua Zhang Hong-wei Ni The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina Hubei Provincial Key Laboratory for New Processes of Ironmaking and Steelmaking Wuhan University of Science and TechnologyWuhan 430081HubeiChina Huangshi Product Quality Supervision and Inspection Institute Huangshi 435000HubeiChina

The optimal composition of a CaO-SiO_(2)-Al_(2)O_(3)-MgO slag in the ladle furnace refining process was investigated to precisely control the contents of[0]and[Si]and improve the cleanliness of 30Cr2Ni4MoV *** iso-[O]lines and iso-[Si] lines of the equilibrium between the CaO-SiO_(2)-Al_(2)O_(3)-MgO refining slag and 30Cr2Ni4MoV steel at 1873 K were calculated by the thermodynamic software FactSage 7.3,and the activities of SiO_(2),Al_(2)O_(3)and CaO in the refining slag were discussed to achieve the optimal composition range of the refining ***,combined with high-temperature"slag-steel"equilibrium experiments,the effects of different refining slags on the oxygen contents,chemical composi-tions,quantities and sizes of inclusions in steels were studied,and then the thermody namic formation mechanism of MgAl_(2)O_(4) inclusions in 30Cr2Ni4MoV steel was *** results showed that the contents of dissolved[O]nd[Si]in steel can be controlled below 10 × 10^(-6)and 0.05%.respectively;when the slag basicity is above *** CaO/Al_(2)O_(3)ratio is above *** the mass fraction of SiO_(2)in the slag docs not cxcced 7%.The chemical composition of the slag has a great influence on the removal and composition of *** assessed stability phase diagrams of ***_(2)O_(3)and MgOAl_(2)O_(3) inclusion formation in the Fe-Al-Mg-O system calculated by FactSage 7.3 show good agreement with the experimental results.

关键词： 30Cr2Ni4MoV steel Non metallic inclusion Refining slag Basicity CaO/Al_(2)O_(3) ratio

AI-assisted food enzymes design and engineering:a critical review

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Systems Microbiology and Biomanufacturing 2023年第1期3卷 75-87页

作者： Xinglong Wang Penghui Yang Beichen Zhao song liu Science Center for Future Foods Jiangnan University1800 Lihu RoadWuxi 214122JiangsuChina School of Biotechnology Jiangnan University1800 Lihu RoadWuxi 214122JiangsuChina

Food enzymes are basic components used for food *** catalysis,food enzymes can function as removing allergy,enriching absorbable nutrients,improving food texture,and adjusting *** enzymes work in various conditions,which brought out the need for engineering these enzymes with harsh environment tolerance and higher catalytic *** intelligence(AI)has recently provided solutions for structural modeling,finding modification hot spots,and guiding mutations toward specific needs,which greatly benefit enzyme ***-based tools showed great advantages in cutting down the computational time,enabling higher prediction accuracy,and providing trainable models suited for wide *** this review,we describe the functions and uses of food enzymes,as well as their utility *** necessity and advantages of using AI-based tools in enzyme engineering,and the differences between using traditional and AI-based tools are mainly *** AI-based tools for enzyme engineering were introduced and described their *** perspective of using AI tools and the future challenges were discussed.

关键词： Artificial intelligence Deep learning Protein rational design Protein thermostability Protein activity

Effect of polysaccharide from Enteromorpha prolifera on maize seedlings under NaCl stress

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Journal of Oceanology and Limnology 2019年第4期37卷 1372-1381页

作者： liu song LI Bing CHEN Xiaolin QIN Yukun LI Pengcheng CAS Key Laboratory of Experimental Marine Biology Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China Laboratory for Marine Drugs and Bioproducts Qingdao National Laboratory for Marine Science and Technology Qingdao 266000 China Center for Ocean Mega-Science Chinese Academy of Sciences Qingdao 266000 China Marine Science and Engineering College Qingdao Agriculture University Qingdao 266000 China

In this study, a polysaccharide from Enteromorpha prolifera (EP) was extracted and its effect on maize seedlings under NaCl stress was investigated. Firstly, the components and structure of the EP were determined. We found that EP is a sulfated polysaccharide of high-molecular weight (Mw, 1 840 KDa) heteropolysaccharides and the main monosaccharide is rhamnose. The polysaccharide was applied to explore its effect on the growth of maize seedlings and its defense response under a salt stress. The results show that EP could promote the growth of maize seedlings under the salt stress. In addition, EP was shown able to significantly regulate membrane permeability and adjustment of osmotic substances such as soluble protein, soluble sugar, and proline, antioxidant enzymes containing superoxide dismutase, catalase, peroxidase, and ascorbate peroxidase. Therefore, EP is an effective salt-resistant substance for the growth of maize seedlings under NaCl stress.

关键词： polysaccharides Enteromorpha prolifera maize seedling NaCl stress

Low Temperature Reduction Degradation Characteristics of Sinter,Pellet and Lump Ore

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Journal of Iron and Steel Research International 2011年第8期18卷 20-24页

作者： WU Sheng-li liu Xiao-qin ZHOU Qi XU Jian liu Cheng-song School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China

The reduction degradation characteristics of typical sinter, pellet and lump ore were tested with the reducing gas conditions simulating two kinds of irowmaking processes. The results show that, in the same condition of gas composition and temperature, the reduction degradation degree （RDI〈3.15mm） of sinter is high, RDI〈3.15mm of lump ore is low and RDI〈3.15 mm of pellet is in the middle level. With two kinds of gas composition simulating different iron-making processes, the reduction degradation indices （RDI） of three kinds of iron ores all present the tenden- cy of ＂inverted V-shape＂ in the temperature range from 450 to 650℃, and the RDI reach the maximum value at 550℃. The reduction degradation degrees of iron ores are extended when mixing the gas with hydrogen to increase the re duction potential, and the influence extent is discrepant for different iron ores. Colligating the increase amplitude of grains in small size fraction, the influence of reducing gas on lump ore is the greatest, the influence on sinter is the second, and the sensitivity of pellet on the reducing gas properties change is relatively small. As for the degradation form, lump ore and sinter both present the degradation ,of cracking, and the distribution of small grains generated from the cracking is in the range from 03 5 to 6. 3 mm uniformly. The lump ore presents surface cracking, while sin- ter presents integral cracking. The pellet presents the degradation of surface stripping, and the proportion of grains smaller than 0.5 mm is the highest, which is up to 90% in the grains smaller than 3.15 mm.

关键词： sinter pellet lump ore low temperature reduction degradation characteristic gas property

Genome-wide identification and expression analysis of anthocyanin biosynthetic genes in Brassica juncea

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Journal of Integrative Agriculture 2020年第5期19卷 1250-1260页

作者： ZHANG Da-wei liu Li-li ZHOU Ding-gang liu Xian-jun liu Zhong-song YAN Ming-li School of Life Science Hunan University of Science and TechnologyXiangtan 411201P.R.China Hunan Key Laboratory of Economic Crops Genetic Improvement and Integrated Utilization Xiangtan 411201P.R.China College of Life Sciences Resources and Environment SciencesYichun UniversityYichun 333600P.R.China Oilseed Research Institute Hunan Agricultural UniversityChangsha 410128P.R.China

Anthocyanins confer the wide range of colors for plants and also play beneficial health roles as potentially protective factors against heart disease and cancer. Brassica juncea is cultivated as an edible oil resource and vegetable crop worldwide, thus elucidating the anthocyanin biosynthetic pathway would be helpful to improve the nutritional quality of Brassica juncea through the breeding and cultivating of high anthocyanin content varieties. Herein, 129 genes in B. juncea were identified as orthologs of 41 anthocyanin biosynthetic genes(ABGs) in Arabidopsis thaliana by comparative genomic analyses. The B. juncea ABGs have expanded by whole genome triplication and subsequent allopolyploidizatoin, but lost mainly during the whole genome triplication between B. rapa/B. nigra and A. thaliana, rather than the allopolyploidization process between B. juncea and B. rapa/B. nigra, leading to different copy numbers retention of A. thaliana homologous genes. Although the overall expansion levels ABGs were similar to the whole genome, more negative regulatory genes were retained in the anthocyanin biosynthesis regulatory system. Transcriptional analysis of B. juncea with different anthocyanin accumulation showed that BjDFR, BjTT19, BjTT8 are significantly up-regulated in plants with purple leaves as compared with green leaves. The overexpression of BjTT8 and these target genes which were involved in late anthocyanin biosynthesis and transport might account for increasing levels of anthocyanin accumulation in purple leaves. Our results could promote the understanding of the genetic mechanism of anthocyanin biosynthesis in B. juncea.

关键词： anthocyanin biosynthetic genes B.juncea comparative genomic analysis transcriptome leaf color

Effect of vanadium on modification of inclusions in Mn-and Si-deoxidized steel during heat treatment at 1 473 K

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Journal of Iron and Steel Research International 2017年第5期24卷 520-528页

作者： Cheng-song liu Xiao-qin liu Hong-wei Ni Shu-feng Yang Jing-she Li Fei Ye The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and Technology School of Metallurgical and Ecological Engineering University of Science and Technology Beijing

The effect of vanadium （V） on the modification of oxide inclusions in steels with different concentra- tions of Mn, Si, and V was determined before and after heat treatment at 1473 K. Changes in the morphology, size, and composition of these inclusions were analyzed. Equilibrium relations between the inclusions and steels at 1873 K and 1473 K were calculated using available thermodynamic data to roughly approximate the stable oxide inclusions in the steels, The results revealed that the concentra- tions of V and Si in the steel are critical for controlling the modification of the inclusions during heat treatment at 1473 K. MnO-SiO2-type oxide inclusions gradually transformed into MnO-V2O3-type or Mn-SiO2- and MnO-V2 O3-type inclusions in low Si high-V steels heat-treated for 60 min, In addi- tion, the morphology of the inclusions changed from spherical to irregular. A Si-accumulated zone and a V-depleted zone formed close to the interface in the steel matrix. The experimental and calcula- tion results indicated that, during the heat treatment, an interface chemical reaction occurred be- tween the Fe-Mn-Si-V steel and the MnO-SiO2 type oxide inclusion.

关键词： Vanadium Oxide inclusion Heat treatment Interface chemical reaction Modification

Characterization,Photoluminescence and Magnetic Properties of SiC Nanowires Synthesized with Nickel Catalyst via Microwave Heating

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Characterization,Photoluminescence and Magnetic Properties o...

High specific surface area porous graphene grids carbon as anode materials for sodium ion batteries

第八届中国功能材料及其应用学术会议

作者： liu song HUANG Sha WANG Ji-gang Jiangsu Key Laboratory of Advanced Metallic Materials School of Materials Science and EngineeringSoutheast University Southeast University-Zhangjiagang Industry Technology Research Institute

ISBN: (纸本)9783037859698

Large scale SiC nanowires were synthesized through a rapid and low-cost microwave heating ***,silica,graphite and nickel powders were used as raw materials and catalyst,respectively,and no inert protective gas was employed during the *** microstructures of the products were comprehensively characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),energy dispersive spectrum(EDS),and transmission electron microscopy(TEM).Results showed that the nanowires have lengths of several dozens of micrometers and diameters of 50 nm *** growth of them was governed by vapor-liquid-solid(VLS) growth *** addition,the photoluminescence(PL)and magnetic properties of the products were subsequently investigated by fluorescent photometer and vibrating sample magnetometer(VSM).The PL spectrum,employing a Xe laser(240 nm) as an excitation source,shows an emission band centered at about 390 nm,indicating that the obtained SiC nanowires possess excellent optical *** hysteresis loop shows big magnetic saturation(Ms) of 0.96 emu/g and small coercivity(Hc) of 37.92 ***,the obtained SiC nanowires can be characterized as typical soft magnetic material,and the improvement of magnetic properties may be attributed to the existence of Ni2 Si phase in the SiC nanowires.

关键词： SiC nanowires Catalyst Microwave heating Magnetic property Photoluminescence

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Journal of Energy Chemistry 2019年第4期28卷 159-166页

作者： Hao Zhang Huinan Guo Aiyang Li Xiaoya Chang song liu Dun liu Yijing Wang Fang Zhang Huatang Yuan College of Chemistry Key Laboratory of Advanced Energy Materials Chemistry (MOE) Nankai University School of Environment and State Key Joint Laboratory of Environment Simulation and Pollution Control Tsinghua University Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)

Although great accomplishments of functional material synthesis have been achieved in sodium ion batteries(SIBs)recently,there are still numerous challenges and problems in preparing carbon-based materials with porous architectures and enough lattice distance for Na^+*** we report a templated strategy to synthesize 3D porous graphene girds(PGGs)consisting of several stacking graphene structure with ultrahigh surface area and hierarchical connected structure by employing Ag nanoparticles(NPs).The Ag NPs will regenerate for decreasing the experimental cost,also in line with principles of green chemistry and environmentally friendly *** PGGs obtain advanced specific capacity of160 m A h g^(-1)at current density of 50 m A h g^(-1).Moreover,112 mA h g^(-1)capacity can be gained at 1 A h g^(-1)during 1000 *** to their porous architecture,ultrahigh surface area and low amorphous graphited structure,PGGs electrode showed the excellent electrochemical performance in high rate capability.

关键词： Carbon-based materials Porous structure Ultrahigh surface area Ag nanoparticle Sodium ion battery