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First-principles study on electronic structure and optical properties of N-doped P-type β-Ga_2O_3

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Science China(Physics,Mechanics & Astronomy) 2012年第1期55卷 19-24页

作者： ZHANG LiYing YAN jinliang ZHANG YiJun LI Ting DING XingWei School of Physics Ludong University Yantai 264025 China

The band structure, density of states, electron density difference and optical properties of intrinsic β-Ga2O3 and N-doped β-Ga2O3 were calculated using first-principles based on density functional theory. After N doping, the band gap decreases, shallow acceptor impurity levels are introduced over the top of the valence band and the absorption band edge is slightly red-shifted compared to that of the intrinsic one. The anisotropic optical properties are investigated by means of the complex dielectric function, which are explained by the selection rule of the band-to-band transitions. All calculation results indicate that N-doping is a very promising method to get P-type β-Ga2O3.

关键词： P-type β-Ga2O3 N-doped β-Ga2O3 first-principles electronic structure optical properties

Control division of agricultural non-point source pollution at medium-sized watershed scale in Southeast China

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Frontiers of Environmental Science & Engineering 2008年第3期2卷 333-339页

作者： jinliang HUANG Huasheng HONG Luoping ZHANG Environmental Science Research Center Xiamen UniversityXiamen 361005China

This paper presents the study carried out for controlling agricultural non-point source pollution(NSP)in a medium-sized watershed covering 1.47×10^(4) km^(2) in Southeast China using quantitative analysis coupled with geographic information system(GIS),universal soil loss equation(USLE),soil conservation service-curve number(SCS-CN),nutrient loss equations,and annualized agricultural nonpoint source model(AnnAGNPS).Based on the quantitative results derived from GIS and environmental models,five control division units were generated for NSP control in Jiulong River watershed,namely,controlling unit for soil losses,controlling unit for livestock breeding and soil losses,controlling unit for excessive fertilizer use and livestock breeding,controlling unit for soil losses and fertilizer use,and controlling unit for excessive fertilizer use and soil *** study proved that integrating GIS with environmental models can be adopted to efficiently evaluate major sources and contributors of NSP,and identify the critical source areas of NSP,which enables adjusting measures to local conditions by further control division units developed through such study for control and management of water quality degradation induced by NSP in the Jiulong River watershed.

关键词： agricultural non-point source pollution watershed geographic information system(GIS) control division

Effect of Nitrogen and Phosphorus on Tissue Nutrition and Biomass of Freshwater Wetland Plant in Sanjiang Plain,Northeast China

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Chinese Geographical Science 2006年第3期16卷 270-275页

作者： XU Zhiguo YAN Baixing HE Yan ZHAI jinliang SONG Changchun Northeast Institute of Geography and Agroecology Chinese Academy of Sciences Changchun 130012 China Graduate University of Chinese Academy of Sciences Beijing 100049 China Chinese Academy of Sciences Beijing 100864 China

Nitrogen (4, 10, 20 and 40g/m2) and phosphorus (1.2, 4.8 and 9.6g/m2) were applied to tanks to evaluating the effects of N and P additions on plant tissue nutrition and the biomass of two freshwater wetland plants in the Sanjiang Plain of Northeast China, namely Carex lasiocarpa and Carex meyeriana. For C. lasiocarpa, the total N concentration (TN) of plant tissues under the treatment of 10g/m2 was lower compared with the other N treatments. Initially, C. lasiocarpa exhibited a significant increase of biomass as compared with the control value, reaching the maximum of 31.20±4.01g/tank under the treatment of 10g/m2, and then dropped to 18.02±1.53g/tank under the treatment of 40g/m2. For C. meyeriana, TN generally increased with increasing amount of N applied. High N applied produced more aboveground biomass than low N applied. C. meyeriana, as the accompanying species, can adapt itself to the wetland enriched by N, and it may replace C. lasiocarpa as the dominant species of wetland. The total P concentration (TP) in tissues of C. lasiocarpa increased with P addition. The aboveground biomass of C. lasiocarpa increased with P addition, and it changed from 18.77±3.29g/tank to 46.03±3.95g/tank. However, TP of tissue may accelerate the C. meyeriana development under the treatment of 1.2g/m2. P accumulation contributes to the dominance of C. lasiocarpa but limits the production of C. meyeriana, and the latter may disappear gradually from the wetland enriched by P. Increased input of N and P might have an influence on wetland plant community composition and structure, so the effects of nutrient inputs and accumulation should be considered to protect the freshwater wetland.

关键词： freshwater wetland nitrogen phosphorus Carex lasiocarpa Carex meyeriana Sanjiang Plain

Magnetically recoverable Fe3O4@polydopamine nanocomposite as an excellent co-catalyst for Fe^3+ reduction in advanced oxidation processes

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Journal of Environmental Sciences 2020年第6期32卷 69-78页

作者： Ling Fan jinliang Xie Zhilin Zhang Yaping Zheng Dongdong Yao Ting Li Department of Applied Chemistry School of Natural and Applied ScienceNorthwestern Polytechnical UniversityXi'an 710072China

Advanced oxidation processes are widely applied to removal of persistent toxic substances from wastewater by hydroxyl radicals(·OH),which is generated from hydrogen peroxide(H2O2)***,their practical applications have been hampered by many strict conditions,such as iron sludge,rigid pH condition,large doses of hydrogen peroxide and Fe^2+,***,a magnetically recyclable Fe3O4@polydopamine(Fe3O4@PDA)coreshell nanocomposite was *** an excellent reducing agent,it can convert Fe^3+to Fe^2+.Combined with the coordination of polydopamine and ferric ions,the production of iron sludge is *** minimum concentration of hydrogen peroxide(0.2 mmol/L and Fe^2+(0.18 mmol/L))is 150-fold and 100-fold lower than that of previous reports,*** also exhibits excellent degradation performance over a wide pH range from 3.0 to *** after the tenth recycling,it still achieves over 99%degradation efficiency with the total organic carbon degradation rate of 80%,which is environmentally benign and has a large economic *** discovery paves a way for extensive practical application of advanced oxidation processes,especially in environmental remediation.

关键词： Fe3O4@polydopamine nanocomposites Fenton-like catalysts Fe^3+/Fe^2+cycle Magnetically reusable

Formation mechanism of high-temperature oxidation film on WE43 magnesium alloy and its effect on corrosion performance

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Journal of Rare Earths 2024年第12期42卷 2316-2324页

作者： Ruizhi Ding Hong Yan Fangqiang Ning Yifan Song jinliang Xu Rongshi Chen School of Materials Science and Engineering Shandong University of Science and Technology Shi-changxu Innovation Center for Advanced Materials Institute of Metal Research Chinese Academy of Sciences

The oxidation behavior of WE43 magnesium alloy in dry air at three temperatures（225, 440 and 525℃）and the corresponding corrosion performance of samples attached to oxide film in 3.5 wt% NaCl solution was investigated. The results show that the oxide films formed at all three temperatures are a complex MgO·RE2O3·ZrO film with different compositions. The film formed at 225℃ is flat and dense, whose components are 3.2MgO·1.8RE2O3·1ZrO. The oxidation ridges begin to form, and then gradually grow into nodular oxides and form a loose and porous oxide layer as the temperature increases to 525℃. The oxide films formed at all three temperatures improve the corrosion resistance of the alloy due to the MgO·RE2O3·ZrO, with the protective properties of oxide films following the order of 225℃ > 440℃ > 525℃, because the dense MgO·RE2O3·ZrO film formed at 225℃ can provide better protection to the substrate than the loose oxide film formed at higher temperatures.

关键词： Magnesium alloy High-temperature oxidation Oxide film Corrosion resistance Rare earths

Catalytic effect comparison of TiO_(2) and La_(2)O_(3) on hydrogen storage thermodynamics and kinetics of the as-milled La-Sm-Mg-Ni-based alloy

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Journal of Magnesium and Alloys 2021年第6期9卷 2063-2077页

作者： Yanghuan Zhang Xin Wei Wei Zhang Zeming Yuan jinliang Gao Huiping Ren Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources Inner Mongolia University of Science and TechnologyNo.7 Aerding RoadKun DistrictBaotou 014010China Department of Functional Material Research Central Iron and Steel Research InstituteNo.76 Xueyuannan RoadHaidian DistrictBeijing 100081China Weishan Cisri-Rare Earth Materials Co. Ltd.Jining 277600China

In this investigation,mechanical grinding was applied to fabricating the Mg-based alloys La_(7)Sm_(3)Mg_(80)Ni_(10)+5 wt.%M(M=None,TiO_(2),La_(2)O_(3))(named La_(7)Sm_(3)Mg_(80)Ni_(10)-5 M(M=None,TiO_(2),La_(2)O_(3))).The result reveals that the structures of as-milled alloys consist of amorphous and *** particle sizes of the added M(M=TiO_(2),La_(2)O_(3))alloys obviously diminish in comparison with the M=None specimen,suggesting that the catalysts TiO_(2)and La_(2)O_(3)can enhance the grinding ***’s more,the additives TiO_(2)and La_(2)O_(3)observably improve the activation performance and reaction kinetics of the *** time required by releasing 3 wt.%hydrogen at553,573 and 593 K is 988,553 and 419 s for the M=None sample,and 578,352 and 286 s for the M=TiO_(2)composite,and 594,366,301 s for the La_(2)O_(3)containing alloy,*** absolute value of hydrogenation enthalpy change|△H|of the M(M=None,TiO_(2),La_(2)O_(3))alloys is 77.13,74.28 and 75.28 kJ/***,the addition of catalysts reduces the hydrogen desorption activation energy(E_(a)^(de)).

关键词： Mg-based alloy Ball milling Catalysts Hydrogen storage kinetics

Different influences of nucleating agents on crystallization behavior of polyethylene and polypropylene

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Science China Chemistry 2012年第6期55卷 1140-1147页

作者： JIANG HaiBin ZHANG XiaoHong QIAO jinliang College of Materials Science and Engineering Beijing University of Chemical Technology Beijing 100029 China SINOPEC Beijing Research Institute of Chemical Industry Beijing 100013 China

The crystallization behavior of polyethylene (PE) and polypropylene (PP), including the neat ones and the ones nucleated with the same nucleating agent (NA), was studied by DSC. It was found that the nucleating agent decelerated the PE nonisothermal crystallization process. NA did enhance the nucleating rates for both PE and PP, but the linear growth rate dominated the volumetric growth rate for PE, and the volumetric growth rate dominated the overall crystallization rate. That is why PE nucleated with NA had a slower overall crystallization rate than the neat one.

关键词： nucleating agent crystallization polyethylene polypropylene

A Numerical Model Prediction for Boiling Multi Channel Flow Rate Distribution andApplication in 600MW Supercritical Variable－Pressure Once－Through Boiler with Vertical Tube Coils

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Journal of Thermal Science 1996年第2期5卷 75-81页

作者： Tingkuan Chen jinliang Xu Lucheng Wu National Lab. on Multiphase Flow Xi’an Jiaotong University Xi’an China Institute of Nuclear Energy Technology Tsinghua University Beijing China Harbin Boiler Works Harbin China

Flow rate distribution is important in a multi channel system when the flow is heated *** paper describes a steady state approach for obtaining the flow distribution among various tubes of complex multi channel system. Based on the present approach,a program has been developed,which is directly applied in thermal hydraulic design and investigation of 600MW supercritical variable-pressure once through boiler.

关键词： multi channel system thermal hydraulic curve flow rate distribution pressure drop.

Detecting the intrinsic Baldwin Effect of the optical FeII complex in Luminous Seyfert 1 Galaxy Fairall 9

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Science China(Physics,Mechanics & Astronomy) 2011年第2期54卷 346-354页

作者： HAN XuHui WANG Jing WEI JianYan YANG DaWei HOU jinliang Key Laboratory for Research in Galaxies and Cosmology Sanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China National Astronomical Observatories Chinese Academy of SciencesBeijing 100012China College of Physics Hebei Normal UniversityShijiaZhuang 050016China Graduate university of the Chiese Academy of Sciences Beijing 100049China

We analyze the optical spectra of Fairall 9,a luminous Seyfert 1 *** are obtained from the AGN Watch program that has monitored this object for 9 *** flux and variation of the optical FeII complex is measured using multi-component profile modeling with FeⅡ templates.A convincing intrinsic Baldwin Effect(BEff) of optical FeⅡ emission blends in Fairall 9 is discovered for the first *** variation of FeⅡ/Hβ(RFe) in Fairall 9 is *** also detect a marginal anti-correla tion between RFe and the continuum flux in its *** anti-correlation and the relatively broad profile of Hβ in this galaxy support the dichotomy reported by Wang et al.(2005).

关键词： active galactic nuclei quasars Seyfert galaxies H Ⅱ regions emission lines Fairall 9