检索结果-南通市图书馆

NEW CATALYTIC SYSTEMS FOR THE fixation OF CO_2 Ⅲ.INFLUENCE OF ADDITIVES AND REACTION MEDIUM ON THE COPOLYMERIZATION OF carbon dioxide-EPICHLOROHYDRIN IN THE PRESENCE OF Nd (P_(204))_3-Al(i-Bu)_3

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 1994年第1期12卷 28-32页

作者：陈仙海张一烽沈之荃 Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027

Copolymerization of carbon dioxide with epichlorohydrin was successfully carried out by usingNd(P_(204))_3-Al(i-Bu)_3 as catalyst (P_(204))=(RO)_2 POO--,R=CH_3 (CH_2),CH(C_2H_5) CH_2--). Addi-tion of carbonyl compounds into the catalyst decreased the carbon dioxide content of the copoly-mer to some extent. Compared to nonpolar solvents, ethereal and moderate polar solvents werefavourable to obtaining higher carbon dioxide content copolymer. The coincidence of these resultswith the assumed copolymerization scheme clearly indicated that the copolymerization proceeds via coordinate anionic mechanism.

关键词： carbon dioxide fixation Rare earth coordination catalyst Epichlorohydrin

Iron and lead ion adsorption by microbial flocculants in synthetic wastewater and their related carbonate formation

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2013年第12期25卷 2422-2428页

作者： Minjie Yao Bin Lian Hailiang Dong Jianchao Hao Congqiang Liu State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of Sciences Key Laboratory of Environmental and Applied Microbiology Chengdu Institute of BiologyChinese Academy of Sciences Jiangsu Key Laboratory for Microbes and Functional Genomics Jiangsu Engineering and Technology Research Center for MicrobiologyCollege of Life ScienceNanjing Normal University State Key Laboratory of Geobiology and Environmental Geology China University of Geosciences Department of Geology and Environmental Earth Science Miami University

Although microbial treatments of heavy metal ions in wastewater have been studied, the removal of these metals through incorporation into carbonate minerals has rarely been reported. To investigate the removal of Fe^3＋ and Pb^2＋, two representative metals in wastewater, through the precipitation of carbonate minerals by a microbial flocculant （MBF） produced by Bacillus mucilaginosus. MBF was added to synthetic wastewater containing different Fe^3＋ and Pb^2＋ concentrations, and the extent of flocculation was analyzed. CO2 was bubbled into the mixture of MBF and Fe^3＋/Pb^2＋ to initiate the reaction. The solid substrates were analyzed via X-ray diffraction, transmission electron microscopy and energy dispersive spectroscopy. The results showed that the removal efficiency decreased and the MBF adsorption capacity for metals increased with increasing heavy metal concentration. In the system containing MBF, metals （Fe^3＋ and Pb^2＋）, and CO2, the concentrated metals adsorbed onto the MBF combined with the dissolved CO2, resulting in oversaturation of metal carbonate minerals to form iron carbonate and lead carbonates. These results may be used in designing a method in which microbes can be utilized to combine CO2 with wastewater heavy metals to form carbonates, with the aim of mitigating environmental problems.

关键词： Bacillus mucilaginosus microbial flocculation wastewater treatment carbon dioxide fixation mineral carbonation

Realizing Stable carbonate Electrolytes in Li-O_(2)/CO_(2)Batteries

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2023年第3期41卷 314-321页

作者： Kai Chen Jia-Yi Du Jin Wang Dong-Yue Yang Jiang-Wei Chu Hao Chen Hao-Ran Zhang Gang Huang Xin-Bo Zhang State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchunJilin130022 China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefeiAnhui230026 China

The increasing demand for high-energy storage systems has propelled the development of Li-air batteries and Li-O_(2)/CO_(2)batteries to elucidate the mechanism and extend battery ***,the high charge voltage of Li2CO3 accelerates the decomposition of traditional sulfone and ether electrolytes,thus adopting high-voltage electrolytes in Li-O_(2)/CO_(2)batteries is vital to achieve a stable battery ***,we adopt a commercial carbonate electrolyte to prove its excellent suitability in Li-O_(2)/CO_(2)*** generated superoxide can be captured by CO_(2)to form less aggressive intermediates,stabilizing the carbonate electrolyte without reactive oxygen species induced *** addition,this electrolyte permits the Li metal plating/stripping with a significantly improved reversibility,enabling the possibility of using ultra-thin Li *** from the good rechargeability of Li2CO3,less cathode passivation,and stabilized Li anode in carbonate electrolyte,the Li-O_(2)/CO_(2)battery demonstrates a long cycling lifetime of 167 cycles at 0.1 mA·cm^(-2)and 0.25 mAh·cm^(-2).This work paves a new avenue for optimizing carbonate-based electrolytes for Li-O_(2)and Li-O_(2)/CO_(2)batteries.

关键词： Energy conversion Li-O_(2)/CO_(2)batteries carbonate electrolytes carbon dioxide fixation Oxygen heterocycles

Artificial and Semi-artificial Photosynthesis(AP and SAP)Systems Based on Metal-Organic Frameworks

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2023年第3期41卷 335-354页

作者： Guanglai Mo Qiao Wang Wanyue Lu Chen Wang Peng Li Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Department of ChemistryFudan UniversityShanghai200438 China

Recently,artificial and semi-artificial photosynthesis have attracted extensive attentions in addressing the crisis of energy from fossil fuels and reducing excessive CO_(2) ***-organic frameworks(MOFs)have been considered as ideal platforms for constructing artificial photosynthesis systems due to their unique properties like large specific surface area,high porosity and diverse framework topology,and tunable *** review discussed the characteristics,superiorities and challenges of MOF-based photocatalysts,and detailed summarization of several common design strategies for MOF-based artificial systems,including i)enhancement of light absorption,ii)acceleration of the charge separation and transfer,and iii)introduction of additional active ***,we give examples showing the applications of MOF-based photocatalysts,where the mechanisms of superior photocatalytic activity and selectivity are also analyzed,thereby providing theoretical guidance for rational design of MOF-based ***,the challenges and future research directions of MOF-based photocatalysts are prospected.

关键词： Artificial photosynthesis Semi-artificial photosynthesis Photocatalysis Metal-organic frameworks Water splitting carbon dioxide fixation

Silver-Catalyzed Three-Component Coupling of carbon dioxide, Amines and α-Diazoesters

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2018年第5期36卷 399-405页

作者： Chaorong Qi Donghao Yan Wenfang Xiong Huanfeng Jiang Key Lab of Functional Molecular Engineering of Guangdong Province School of Chemistry and Chemical Engineering South China University of TechnoFogy Guangzhou Guangdong 510640 China State Key Lab of Luminescent Materials and Devices South China University of Technology Guangzhou Guangdong 510640 China

A silver-catalyzed three-component coupling reaction of carbon dioxide, amines and α-diazoesters has been developed for the first time. The novel reaction provides an efficient and practical methodology for the synthesis of a wide range of new α-carbamoyloxy esters, which are difficult to prepare by existing methods. The advantages of the method include the use of readily available starting materials, simple catalytic system, good atom economy and high functional group tolerance.

关键词： carbon dioxide fixation carbamates diazo compounds multicomponent reactions silver

Recent Advances on Metal-Organic Frameworks in the Conversion of carbon dioxide

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2021年第2期39卷 440-462页

作者： Xiongli Liu Jinli Li Na Li Baiyan Li Xian-He Bu School of Materials Science and Engineering National Institute for Advanced MaterialsTKL of Metal and Molecule-Based Material ChemistryNankai UniversityTianjin300350 China College of Chemistry State Key Laboratory of Elemento-Organic ChemistryNankai UniversityTianjin300071 China

With the development of modern industry,global warming is becoming a challenging issue due to the emissions of large quantities of greenhouse gases,mainly carbon dioxide(CO_(2)).The conversion of CO_(2)to useful compounds is considered as an effective and economic way to solve such a climate ***-organic frameworks(MOFs)are an emerging class of porous crystalline materials that have shown great potential in the conversion of CO_(2).The advantages of MOFs in CO 2 conversion lie in their high surface areas,adjustable pore size,and high *** importantly,desirable functional sites can be easily designed and precisely installed to the pore wall of target MOFs by pre-assembly and/or post-synthetic modification(PSM)*** review summarizes the recent advances in constructing MOF catalysts for the application in CO_(2)*** believe that the design and synthesis of MOF catalysts for CO_(2)conversion can be a promising way to solve the“greenhouse effect”.

关键词： Metal-organic frameworks Catalysis carbon dioxide fixation Fine chemicals Small-molecule compounds

Distribution characteristics and diversities of cbb and coxL genes in paddy soil profiles from southern China

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Pedosphere 2021年第6期31卷 954-963页

作者： Wentao PENG Yan WANG Xiuxiu ZHU Liufeng XU Juan ZHAO Zhongli CUI Hui CAO College of Life Sciences/Key Laboratory of Agricultural Environmental Microbiology Ministry of Agriculture and Rural AffairsNanjing Agricultural UniversityNanjing 210095(China) Rubber Research Institute Chinese Academy of Tropical Agricultural SciencesHaikou 571101(China)

The Calvin-Benson-Bassham cycle and Wood-Ljungdahl pathway are two well-known ones in the six carbon sequestration pathways,but the current knowledge of their occurrence in different layers of agricultural soil profiles is *** this study,the diversities of three genes encoding ribulose-1,5-bisphosphate carboxylase/oxygenase(Rubis CO),i.e.,genes encoding the green-like(cbbLG)and red-like(cbbLR)forms of Rubis COⅠ and encoding Rubis COⅡ(cbbM),and the gene encoding carbon monoxide dehydrogenase large subunit(coxL)from five paddy soils in southern China were investigated by real-time quantitative polymerase chain reaction,restriction fragment length polymorphism(RFLP)analysis,and clone *** abundances of the four genes ranged from 10^(7) to 10^(9) copies g^(-1) soil,and the cbbLR gene outnumbered the other three genes in all soil samples,suggesting important roles they play in carbon dioxide(CO_(2))*** addition,it was found that the copy numbers of cbbLR and cbbLG decreased with increasing soil depth,while the copy numbers of cbbM and coxL decreased in the shallow depths but increased with increasing soil *** results of RFLP showed a larger Shannon index(H)in the deeper soil layers among the four gene clone libraries,indicating that the community diversity in these soil layers was *** cbbLG gene had relatively low diversity(at genus level),and most of the sequences were classified as Sideroxydans and *** contrast,the highly diverse groups were found in the other three gene clone libraries(cbbLR,cbbM,and coxL),most of which were distantly related to known sequences,even forming separate *** summary,this study provides a new insight into CO_(2) fixers along agricultural soil profiles by comparing four bacterial genes.

关键词： Calvin-Benson-Bassham cycle carbon dioxide fixation carbon monoxide dehydrogenase ribulose-1 5-bisphosphate carboxylase/oxygenase

Synthetic biology for CO2 fixation

在线全文

学校读者我要写书评

暂无评论

Science China(Life Sciences) 2016年第11期59卷 1106-1114页

作者： Fuyu Gong Zhen Cai Yin Li CAS Key Laboratory of Microbial Physiological and Metabolic Engineering Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China University of the Chinese Academy of Sciences Beijing 100049China

Recycling of carbon dioxide(CO_2) into fuels and chemicals is a potential approach to reduce CO_2 emission and fossil-fuel consumption. Autotrophic microbes can utilize energy from light, hydrogen, or sulfur to assimilate atmospheric CO_2 into organic compounds at ambient temperature and pressure. This provides a feasible way for biological production of fuels and chemicals from CO_2 under normal conditions. Recently great progress has been made in this research area, and dozens of CO_2-derived fuels and chemicals have been reported to be synthesized by autotrophic microbes. This is accompanied by investigations into natural CO_2-fixation pathways and the rapid development of new technologies in synthetic biology. This review first summarizes the six natural CO_2-fixation pathways reported to date, followed by an overview of recent progress in the design and engineering of CO_2-fixation pathways as well as energy supply patterns using the concept and tools of synthetic biology. Finally, we will discuss future prospects in biological fixation of CO_2.

关键词： carbon dioxide fixation synthetic biology CO2-fixation pathway energy supply

Polystyrene-supported Phenol/DMAP： an Efficient Binary Catalyst System for CO2 fixation to Give Cyclic carbonates

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2007年第7期25卷 1051-1054页

作者：戚朝荣江焕峰汪朝阳邹波 Center of Green Chemistry College of Chemistry South China University of Technology Guangzhou 510640 China

Polystyrene-supported phenol （PS-PhOH） was successfully synthesized by alkylation reaction of phenol with 2% DVB cross-linked chloromethylated polystyrene and characterized by IR spectra and elemental analysis. In conjunction with an organic base such as DMAP, DBU, triethylamine （Et3N）, diethylamine （Et2NH） or pyridine, the PS-PhOH could effectively catalyze the coupling reaction of carbon dioxide with epoxides to give cyclic carbonates in high yield and selectivity under mild conditions. The binary catalyst system of the PS-PhOH/DMAP was found to be the most active. The influence of reaction temperature, carbon dioxide pressure and reaction time on the yield of product was carefully investigated. The PS-PhOH could be recycled by simple filtration for at least up to ten times without loss of catalytic activity.

关键词： carbon dioxide epoxide carbon dioxide fixation cyclic carbonate supported catalyst