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Recent Advances in Photocatalytic CO2 Reduction Using Earth-Abundant Metal Complexes-Derived Photocatalysts

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Chinese Journal of Chemistry 2018年第5期36卷 455-460页

作者： Yanfei Zhao zhimin liu Beijing National Laboratory for Molecular Sciences Key Laboratory of Colloid Interface and Thermodynamics Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China

Photochemical reduction of CO2 with H20 into energy-rich chemicals using inexhaustible solar energy is an appealing strategy to simultaneously address the global energy and environmental issues. Earth-abundant metal complexes show promising application in this field due to their easy availability, rich redox valence and tunable property. Great progress has been seen on catalytic reduction of CO2 under visible light illumination employing earth-abundant metal complexes and their hybrids as key contributors, especially for producing CO and HCOOH via the two-electron reduction process. In this minireview, we will summarize and update advances on earth-abundant metal complex-derived photocatalytic system for visible-light driven CO2 photoreduction over the last 5 years. Homogeneous earth-abundant metal complex photocatalysts and earth-abundant metal complex derived hybrid photocatalysts were both presented with focus on efficient improvement strategy.

关键词： CO2 reduction visible light earth-abundant metal complexes homogeneous catalysis heterogeneous catalysis

The historical logics and geographical patterns of rural-urban governance in China

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Journal of Geographical Sciences 2022年第7期32卷 1225-1240页

作者： YE Chao PAN Jiawei liu zhimin Key Laboratory of Geographic Information Science(Ministry of Education) School of Geographic SciencesResearch Center for China Administrative DivisionEast China Normal UniversityShanghai 200241China

The advent of a mobile society has led to profound changes in China’s traditional rural-urban pattern and called for new strategies for urban and rural *** on a macro perspective of temporal and spatial evolution,this study analyzes the historical logics of rural-urban governance,explores the geographical patterns of challenges in China’s rural-urban governance,and finally puts forward targeted strategies for rural-urban governance toward integrated and sustainable development in *** the historical perspective,the urban originates from the rural,and the connotation of rural,that is,a regional-scale outlook,rural-urban relations,and sociocultural interaction,forms the traditional approach to rural-urban ***’s rural-urban governance has evolved from antagonism toward *** terms of theoretical development,the turn toward mobility is an important driving factor shaping and promoting the transformation of research focus on rural-urban *** mobility of urban and rural factors has especially in recent decades brought extensive challenges for governance,which are highlighted by the disintegration of the stability of rural and urban structures,growing regional disparities in rural education levels,and serious aging and hollowing crises in rural *** therefore propose that rural-urban governance should give sufficient consideration to the convergence of wider interests;realize social potential through institutional,cultural and spatial restructuring;and attach importance to collaborative development and *** the transfer of rural problems to urban areas should be paid attention to by rural-urban *** research enriches the knowledge regarding the logics and patterns of China’s rural-urban governance from an interdisciplinary *** is also helpful in the promotion of rural-urban integration and sustainable development,especially at a time when the mobility of social factors between rural area

关键词： rural-urban relation urbanization sustainable development mobility regional disparities

Design of porous organic polymer catalysts for transformation of carbon dioxide

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Green Chemical Engineering 2022年第2期3卷 96-110页

作者： Guipeng Ji Yanfei Zhao zhimin liu Beijing National Laboratory for Molecular Sciences Key Laboratory of Colloid and Interface and Thermodynamics(CAS)Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences Beijing100049China

The transformation of carbon dioxide(CO_(2))into fuels and chemicals is an interesting topic,which has been paid much attention in recent *** materials with specific functionalities are highly required for CO_(2)capture and conversion,which have been widely *** an emerging material platform,porous organic polymers(POPs)have attracted considerable scientific interest due to their distinctive properties such as tailorable func-tionalization,large surface areas,adjustable porosity,versatile polymerizations,good physicochemical and thermal *** group focuses on designing and synthesizing POPs via introducing CO_(2)-philic groups and organic ligands into the skeletons of the polymers and immobilizing metal active species onto their surface,and a series of POPs with functional groups,such as,azo,Tr€oger's base,fluorine,phenolic–OH,have been prepared for CO_(2)*** this review article,we mainly introduce our recent work on design of POPs-based catalysts for CO_(2)transformation,which include POPs-based catalysts for cycloaddition reactions of epoxides and prop-argylic alcohols with CO_(2),for reductive transformation of CO_(2)with H 2,for photocatalytic/electrocatalytic reduction of CO_(2).In addition,the perspectives of the POP-based catalysts for CO_(2)transformation will be discussed as well.

关键词： Porous organic polymers Carbon dioxide CO_(2)transformation

Chitosan-mediated synthesis of mesoporous α-Fe_(2)O_(3)nanoparticles and their applications in catalyzing selective oxidation of cyclohexane

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Science China Chemistry 2010年第7期53卷 1502-1508页

作者： HUANG ChangLiang ZHANG HongYe SUN ZhenYu liu zhimin Beijing National Laboratory for Molecular Sciences Center for Molecular ScienceInstitute of ChemistryChinese Academy of SciencesBeijing 100190China

This paper reports the chitosan-mediated synthesis of porous hematite nanoparticles with FeCl3 as the precursor via a hydrothermal approach at 160℃.A series of porous chitosan/iron oxide hybrid nanoparticles were obtained via changing the ratio of chitosan to FeCl3,FeCl3 concentration and pH value of the reaction solution,and producing porous iron oxide nanoparticles after *** as-prepared samples were characterized by means of X-ray diffraction,transmission electron microscopy,thermal gravimetric analysis,Fourier transform infrared,and N2 *** particle sizes of these metal oxides were less than 100 nm,and the pore sizes were in the range of 2-16 *** was demonstrated that chitosan played a key role in the formation of the porous *** resultant α-Fe2O3 nanoparticles were used as the support to immobilize Au or Pd nanoparticles,producing Au/α-Fe2O3 or Pd/α-Fe2O3 *** as-prepared α-Fe2O3 nanocatalyst exhibited high selectivity towards cyclohexanone and cyclohexanol for catalyzing cyclohexane oxidation with O2 at 150℃.

关键词： chitosan mesoporous nanoparticles α-Fe_(2)O_(3) cyclohexane oxidation

Species composition and diversity,and carbon stock in a dune ecosystem in the Horqin Sandy Land of northern China

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Journal of Arid Land 2015年第1期7卷 82-93页

作者： FeiLong HU WenKai SHOU Bo liu zhimin liu Carlos A BUSSO State Key Laboratory of Forest and Soil Ecology Institute of Applied Ecology Chinese Academy of Sciences University of Chinese Academy of Sciences Agronomy Department National University of the South and CERZOS (CONICET)

In this study, we determined carbon allocation and carbon stocks in the plant-soil system of different dune ecosystems in northeastern China. We quantified the species composition, above and below-ground bio masses, and carbon stocks of three dune types （i.e. active dunes, semi-stabilized dunes and stabilized dunes） and their corresponding inter-dune lowlands （i.e. interdune lowlands of active dunes, interdune lowlands of semi-stabilized dunes and interdune lowlands of stabilized dunes） in the Horqin Sandy Land. The results showed that the succession series on interdune lowlands of the Horqin Sandy Land confirmed differences in species composition of the various dune types. Aboveground carbon （AGC） on the interdune lowlands of semi-stabilized dunes （33.04 g C/m2） was greater （P〈0.05） than that on the interdune lowlands of active dunes （10.73 g C/m2）. At the same time, the different dune types did not show any significant differences （/：〉〉0.05） in belowground plant carbon （BGC）. However, the percentage of plant BGC in interdune lowlands of active dunes （81.5%） was significantly higher （P〈0.05） than that in the interdune lowlands of semi-stabilized dunes （58.9%）. The predominant carbon pool in the study dune ecosystem was in the soil. It accounted for 95% to 99% of total carbon storage. Soil organic carbon （SOC） was at least 55% greater （P〈0.05） in the interdunes than in the dunes. Stabilized dunes showed at least a 37% greater （P〈0.05） SOC content than active dunes up to a 1-m soil depth. Meanwhile, SOC content of interdune lowlands of semi-stabilized dunes was greater （P〈0.05） than that of interdune lowlands of active dunes only up to a 20-cm soil depth. The dune ecosystem showed a great potential to store carbon when interdune lowlands of active dunes were conversed to interdune lowlands of semi-stabilized dunes, which stored up to twice as much carbon per unit volume as interdune lowlands of active dunes.

关键词： species diversity carbon storage sand dunes interdune lowlands semi-arid areas

Functions of canopy-stored seeds in the dune ecosystem: conclusions from Agriophyllum squarrosum and Artemisia wudanica

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Frontiers in Biology 2009年第4期4卷 486-490页

作者： zhimin liu Xiumei WANG Institute of Applied Ecology Chinese Academy of SciencesShenyang 110016China Graduate School of Chinese Academy of Sciences Beijing 100049China

Delay in seed release is found in the dune ***,its functions have been rarely *** studied delayed seed release in the Agrio-phyllum squarrosum(Chenopodiaceae),an annual psam-mophyte,and the Artemisia wudanica(Asteraceae),a psammophilous subshrub in an active sand dune field in Inner Mongolia,China,to get insights into its functions in dealing with sand *** concluded that delay in seed release in the dune ecosystem are as follows:(1)postponing dispersal of a portion of seeds until the end of windy season and the start of growing season;(2)regulating the spatiotemporal pattern of seed bank;(3)helping psammophytes adapt to wind erosion on the active sand dune;and(4)helping psammophytes realize long-distance dispersal.

关键词： sand movement psammophytes persistent soil seed germination seedling emergence

Which factors have stronger explanatory power for primary wind dispersal distance of winged diaspores:the case of Zygophyllum xanthoxylon(Zygophyllaceae)?

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Journal of Plant Ecology 2016年第3期9卷 346-356页

作者： Jinlei Zhu Minghu liu zhiming Xin Yingming Zhao zhimin liu State Key Laboratory of Forest and Soil Ecology Institute of Applied EcologyChinese Academy of Sciences72 Wenhua RoadShenyang 110016China University of Chinese Academy of Sciences 19 Yuquan RoadBeijing 100049China Experimental Center of Desert Forest Chinese Academy of Forest1 Shiyan LaneTuanjie RoadDengkou 015200China

Aims How seed dispersal distance is related to various factors is a major challenge for seed ***,there are different answers as to which factor is most important in determining wind dispersal *** study is to quantitatively describe the relationship between various factors and primary wind dispersal distance of winged *** The dispersal distances of five morphologies of winged diaspores in Zygophyllum xanthoxylum(Zygophyllaceae)were measured under controlled conditions in a wind *** explanatory power of environmental factor(*** speed),plant trait(*** height)and diaspore attributes(*** loading(the ratio of diaspore mass to projected area),settlement-velocity,shape index(the variance of diaspore length,width and thickness))to the variation in dispersal distance was assessed by releasing diaspores at varying wind speeds and release *** Findings Wind speed and seed release height were the strongest explanatory factors to dispersal distance,contributing 41.1%and 24.8%(P<0.01)to total variation in dispersal distance,*** speed accounted more for relatively light disc-shaped seeds than for relatively heavy spherical *** loading,shape index and settlement-velocity explained 9.0%(P<0.01),1.4%(P<0.01)and 0.9%(not significant)of the variation in dispersal distance,*** disc-shaped to four-winged diaspores,relative contributions of wing loading and shape index decreased but contribution of settlementvelocity *** relative contributions of various factors to wind seed dispersal distance may change with the change in seed morphology.

关键词： Zygophyllum xanthoxylon(Zygophyllaceae) seed dispersal by wind seed morphology terminal velocity wind tunnel experiment

Choline-based ionic liquids for CO_2 capture and conversion

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Science China Chemistry 2019年第2期62卷 256-261页

作者： Ruipeng Li Yanfei Zhao Zhiyong Li Yunyan Wu Jianji Wang zhimin liu Key Laboratory of Green Chemical Media and Reactions Ministry of Education School of Chemistry and Chemical EngineeringHenan Normal University Beijing National Laboratory for Molecular Sciences Key Laboratory of Colloid Interface and Thermodynamics CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences

Choline-based ionic liquids(Ch-ILs) with anions possessing interacting sites to attract CO_2 were designed, which could capture CO_2 with capacity >1.0 mol CO_2 per molar IL under ambient conditions. Moreover, this kind of ILs combining with Cu Cl could catalyze the formylation of amines with CO_2/H_2 at 120 °C. Especially, choline imidazolate showed the best performance,affording a series of N-formamides in excellent yields. It was demonstrated that the IL activated CO_2 and the synergistic effect between the IL and Cu Cl resulted in the high activity for catalysing the formylation of amines with CO_2/H_2.

关键词： choline ionic liquid N-formylation CO2 H2

Preliminary results of optical emission spectroscopy by line ratio method in the RF negative ion source at ASIPP

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Plasma Science and Technology 2019年第4期21卷 155-160页

作者： Yan WANG zhimin liu Lizhen LIANG Chundong HU Institute of Plasma Physics Chinese Academy of SciencesHefei 230031.People's Republic of China University of Science and Technology of China.Hefei 230026.People's Republic of China

Optical emission spectroscopy(OES)using the trace rare gases of Ar and Xe have been carried out in a radio frequency(RF)driven negative ion source at Institute of Plasma Physics,Chinese Academy of Science(ASIPP),in order to determine the electron temperature and density of the hydrogen *** line-ratio methods based on population models are applied to describe the radiation process of the excited state particles and establish their relations with the plasma *** spectral lines from the argon and xenon excited state atoms with the wavelength of 750.4 and 828.0 nm are used to calculate the electron temperature based on the corona *** argon ions emission lines with the wavelength of 480 and 488 nm are selected to calculate the electron density based on the collisional radiative *** has given the preliminary results of the electron temperature and density by varying the discharge gas pressure and RF *** to the experimental results,the typical plasma parameters isTe2≈2-4 eV and ne≈1 x 1017-8 x 1017 m^-3 in front of plasma grid.

关键词： optical emission spectroscopy neutral beam injection RF negative ion source