检索结果-南通市图书馆

3D star-like atypical hybrid MOF derived single-atom catalyst boosts oxygen reduction catalysis

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2021年第4期30卷 355-360页

作者： Lei Zhou Peng Zhou Yelong Zhang bingyao Liu Peng Gao Shaojun Guo BIC-ESAT College of EngineeringPeking UniversityBeijing 100871China Department of Materials Science and Engineering College of EngineeringPeking UniversityBeijing 100871China School of Applied Physics and Materials Wuyi UniversityJiangmen 529020GuangdongChina International Center for Quantum Materials and Electron Microscopy LaboratorySchool of PhysicsPeking UniversityBeijing 100871China

Developing high-efficiency,stable and non-precious electrocatalysts for oxygen reduction reaction(ORR)is highly important for energy conversion and *** atom catalysts(SACs)show good potential in enhancing ORR,however,the specifical control over the coordination surroundings around single metal center to intrinsically modify the electron structure is still a great ***,we demonstrate that a 3 D hybrid MOF composed of cobalt doped ZIF-L and ZIF-8,featuring star morphology with six equal branches,can be used as an advanced precursor for making the Co SACs for greatly boosted *** as-synthesized Co_(SA)-N-C exhibits excellent ORR activity with E_(1/2) of 0.891 V in alkaline medium,outperforming the commercial Pt/C by 39 m ***,the E_(1/2) of Co_(SA)-N-C(0.790 V)is merely 15 m V,less than that of Pt/C(0.805 V)in acid medium,which is among the best in the reported state-of-the-art *** calculations demonstrate that the enhanced ORR performance is assigned to the formation of atomically isolated cobalt atom coordinated three N atoms and one C atom,which is easier to decrease the free energy of rate determining step and accelerate the ORR process than that of traditional cobalt atom coordinated four N *** addition,a primary Zn-air battery with Co_(SA)-N-C cathode reveals a maximum power density of 92.2 m W cm^(-2) at 120.0 m A cm^(-2),far higher than that of commercial catalysts(74.2 m W cm^(-2) at 110.0 m A cm^(-2)).

关键词： Single atom catalysts Oxygen reduction reaction Metal-organic frameworks Zn-air battery

Additives enhancing supported amines performance in CO_(2)capture fromair

在线全文

学校读者我要写书评

暂无评论

SusMat 2023年第3期3卷 416-430页

作者： Yaozu wang Yihe Miao bingyao Ge Zhijun He Xuancan Zhu Shanke Liu Jia Li Lijun Yu College of Smart Energy Shanghai Jiao Tong UniversityShanghaiChina China-UK Low Carbon College Shanghai Jiao Tong UniversityShanghaiChina Research Center of Solar Power&Refrigeration School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghaiChina Carbon Neutrality and Climate Change Thrust Society HubThe Hong Kong University of Science and Technology(Guangzhou)Nansha

The utilization of supported amines as adsorbents in direct air capture(DAC)has been demonstrated to be a promising strategy for the reduction of CO_(2)*** improve the performance of amine-based adsorbents,the incorporation of additives has been widely *** the present study,we conduct a comprehensive comparison of seven additives on tetraethylenepentamine-impregnated mesoporous silica as a representative amine-based *** results indicate thatminor molecularweight additiveswith hydroxyl groups show improved adsorption-desorption performance and increase oxidative stability.A proposed mechanism for these improvements is the combined physical and chemical promotion effects of hydroxyl *** a comprehensive review of existing literature,it is found that the effects of additives on amine-based adsorbents are dependent on factors,such as additive type,pristine adsorbent properties,incorporation method,and testing *** on these findings,it is recommended that future DAC systems prioritize the use of hydroxyl-containing additives,whereas higher CO_(2)concentration and temperature capture may benefit from the incorporation of additives without hydroxyl *** conclusions are expected to contribute to the design of efficient adsorbents for CO_(2)capture.

关键词： additives direct air capture hydroxyl groups supported amine adsorbents tetraethylenepentamine

Distribution and conservation of the Indo–Pacific humpback dolphin in 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

Integrative Zoology 2009年第2期4卷 240-247页

作者： bingyao CHEN Dongmei ZHENG Guang YANG Xinrong XU Kaiya ZHOU Jiangsu Key Laboratory for Biodiversity and Biotechnology Nanjing Normal UniversityNanjingJiangsuChina College of Oceanography and Environmental Science Xiamen UniversityXiamenFujianChina

The Indo–Pacific humpback dolphin(Sousa chinensis Osbeck,1765)is a threatened species inhabiting the waters of *** being of conservation concern,the distribution and abundance of this species has not been comprehensively *** 1994 to 2008 we performed over 14000 km of line-transect surveys and adminis-tered over 700 questionnaires to collect basic information on the geographic range and likely abundance of Indo–Pacific humpback dolphins along the southern and eastern coasts of *** our study we were able to establish a reporting network of stranding and incidental catches for this *** quantitative data suggests that only 76 animals remain around Xiamen,39 in the Hepu Nature Reserve and 114 in the estuary of the Dafengjiang *** data from local fishing people and government officials suggests that dolphins may exist year-round in waters off Ningde and *** found that wild populations of Sousa chinensis in this important region are clearly being affected by human disturbance and habitat deterioration,including underwater blasting,vessel collision,fishing,aquaculture and water *** some protected areas have been established and this species is protected under Chinese law,there remains virtually no protection for this animal.

关键词： China conservation Indo–Pacific humpback dolphin Sousa chinensis survey.

Effect of MgO promoter on Ni-based SBA-15 catalysts for combined steam and carbon dioxide reforming of methane

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Natural Gas Chemistry 2008年第3期17卷 225-231页

作者： bingyao Huang Xiujin Li Shengfu Ji Bao Lang Fabien Habimana Chengyue Li State Key Laboratoly of Chemical Resource Engineering Beijing University of Chemical Technology. Beijing 100029. China Department of Environmental Engineering Beijing University of Chemical Technology Beijing 100029 China

A series of Ni/SBA-15 catalysts with Ni contents ranging from 5 wt% to 15 wt%, as well as another series of 10%Ni/MgO/SBA-15 catalysts, in which the range of the MgO content was from 1 wt% to 7 wt%, were prepared, and their catalytic performances for the reaction of combined steam and carbon dioxide reforming of methane were investigated in a continuous flow microreactor. The structures of the catalysts were characterized using the XRD, H2-TPR and CO2-TPD techniques. The results indicated that the CO selectivity for this reaction was very close to 100%, and the H2/CO ratio of the product gas could be controlled by changing the H2O/CO2 molar ratio of the feed gas. The simultaneous and plentiful existing of steam and CO2 had a significant influence on the catalytic performance of the 10%Ni/SBA-15 catalyst without modification. After reacting at 850 °C for 120 h over this catalyst, the CH4 conversion dropped from 98% to 85%, and the CO2 conversion decreased from 86% to 53%. However, the 10%Ni/3%MgO/SBA-15 catalyst exhibited a much better catalytic performance, and after reacting for 620 h, the CO2 conversion over this catalyst dropped from 92% to around 77%, while the CH4 conversion was not decreased. Oxidation of the Ni0 species as well as carbon deposition during the reaction were the main reasons for the deactivation of the catalyst without modification. On the other hand, modification by the MgO promoter improved the dispersion of the Ni0 species, and enhanced the CO2 adsorption affinity which in turn depressed the occurring of carbon deposition, and thus retarded the deactivation process.

关键词： MgO promoter Ni-based catalyst SBA-15 methane combined steam carbon dioxide reforming synthesis gas

3D printing of poly(ethyleneimine)-functionalized Mg-Al mixed metal oxide monoliths for direct air capture of CO_(2)

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第9期96卷 491-500页

作者： Qingyang Shao Zhuozhen Gan bingyao Ge Xuyi Liu Chunping Chen Dermot O’Hare Xuancan Zhu Research Center of Solar Power&Refrigeration School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240China Chemistry Research Laboratory Department of ChemistryUniversity of OxfordOxford OX13TAUK

Direct air capture(DAC)of CO_(2)plays an indispensable role in achieving carbon-neutral goals as one of the key negative emission *** large air flows are required to capture the ultradilute CO_(2)from the air,lab-synthesized adsorbents in powder form may cause unacceptable gas pressure drops and poor heat and mass transfer efficiencies.A structured adsorbent is essential for the implementation of gas-solid contactors for cost-and energy-efficient DAC *** this study,efficient adsorbent poly(ethyleneimine)(PEI)-functionalized Mg-Al-CO_(3)layered double hydroxide(LDH)-derived mixed metal oxides(MMOs)are three-dimensional(3D)printed into monoliths for the first time with more than 90%adsorbent *** printing process has been optimized by initially printing the LDH powder into monoliths followed by calcination into MMO *** structure exhibits a 32.7%higher specific surface area and a 46.1%higher pore volume,as compared to the direct printing of the MMO powder into a *** impregnation of PEI,the monolith demonstrates a large adsorption capacity(1.82 mmol/g)and fast kinetics(0.7 mmol/g/h)using a CO_(2)feed gas at 400 ppm at 25℃,one of the highest values among the shaped DAC *** of the amino-polymers during the post-printing process affects the diffusion of CO_(2),resulting in slower adsorption kinetics of pre-impregnation monoliths compared to post-impregnation *** optimal PEI/MeOH ratio for the post-impregnation solution prevents pores clogging that would affect both adsorption capacity and kinetics.

关键词： 3D printing Mixed metal oxides Amine functionalization Structured adsorbent Direct air capture

Okara Cellulose Nanofibrils Produced by Pretreatment with Sustainable Deep Eutectic Solvent Coupled with Various Mechanical Treatments

在线全文

学校读者我要写书评

暂无评论

Paper And Biomaterials 2022年第2期7卷 46-55页

作者： Peiyi Li Haozhe Lei Boxing Jian Ruiyan Liu Miaomiao Zhou Yumeng wang Hezhen Liu Yun wang bingyao Zhou College of Bioresources Chemical and Materials Engineering National Demonstration Center for Experimental Light Chemistry Engineering EducationShaanxi University of Science and TechnologyXi'anShaanxi Province710021China Key Laboratory of Paper Based Functional Materials of China National Light Industry Xi'anShaanxi Province710021China Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development Xi'anShaanxi Province710021China Department of Chemical and Paper Engineering College of Engineering and Applied ScienceWestern Michigan University4651 Campus DrKalamazooMichigan49008US

In this study,a green,environmentally friendly method for rapid cellulose nanofribril(CNF)preparation with a significant cost advantage was *** with a deep eutectic solvent(DES)synthesized from oxalic acid dihydrate and choline chloride(ChCl-O)was combined with various mechanical treatment methods to produce okara CNFs from agricultural waste,with different diameter *** results showed that high-speed stirring produced CNFs with an average diameter of 27 *** method was advantageous because it consumed about 94%less energy than traditional high-pressure homogenization *** DES recovery rate was more than 90%,and DES served as a highly effective treatment,indicating that DES pretreatment is an economical,convenient,and effective strategy for okara CNF preparation.

关键词： okara deep eutectic solvent(DES) cellulose nanofibril(CNF) high-speed stirring high-pressure homogenization recovery

Graphene-driving strain engineering to enable strain-free epitaxy of AlN film for deep ultraviolet light-emitting diode

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2022年第5期11卷 808-819页

作者： Hongliang Chang Zhetong Liu Shenyuan Yang Yaqi Gao Jingyuan Shan bingyao Liu Jingyu Sun Zhaolong Chen Jianchang Yan Zhiqiang Liu Junxi wang Peng Gao Jinmin Li Zhongfan Liu Tongbo Wei Research and Development Center for Semiconductor Lighting Technology Institute of SemiconductorsChinese Academy of Sciences100083 BeijingChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences100049 BeijingChina Center for Nanochemistry(CNC) Beijing Science and Engineering Center for NanocarbonsBeijing National Laboratory for Molecular SciencesCollege of Chemistry and Molecular EngineeringPeking University100871 BeijingChina Electron Microscopy Laboratory and International Center for Quantum MaterialsSchool of PhysicsPeking University100871 BeijingChina Beijing graphene institute(BGI) 100095 BeijingChina Academy for Advanced Interdisciplinary Studies Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced MaterialsPeking University100871 BeijingChina State Key Laboratory of Superlattices and Microstructures Institute of SemiconductorsChinese Academy of Sciences100083 BeijingChina

The energy-efficient deep ultraviolet(DUV)optoelectronic devices suffer from critical issues associated with the poor quality and large strain of nitride material system caused by the inherent mismatch of *** this work,we have prepared the strain-free AlN film with low dislocation density(DD)by graphene(Gr)-driving strain-pre-store engineering and a unique mechanism of strain-relaxation in quasi-van der Waals(QvdW)epitaxy is *** DD in AlN epilayer with Gr exhibits an anomalous sawtooth-like evolution during the whole epitaxy *** can help to enable the annihilation of the dislocations originated from the interface between AlN and Gr/sapphire by impelling a lateral two-dimensional growth ***,it can induce AlN epilayer to pre-store sufficient tensile strain during the early growth stage and thus compensate the compressive strain caused by ***,the low-strain state of the DUV light-emitting diode(DUV-LED)epitaxial structure is realized on the strain-free AlN template with ***,the DUV-LED with Gr demonstrate 2.1 times enhancement of light output power and a better stability of luminous wavelength compared to that on bare *** in-depth understanding of this work reveals diverse beneficial impacts of Gr on nitride growth and provides a novel strategy of relaxing the vital requirements of hetero-mismatch in conventional heteroepitaxy.

关键词： sapphire diode strain

Vortex‑Inspired Hydrodynamic Drafting Spinning Platform for Large‑Scale Preparation of Hydrogel Fibers

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advanced Fiber Materials 2024年第6期6卷 1710-1728页

作者： Jinhua Dong Lei wang Yi Chen Boyu Xu Hai Tang Ziqiang Zhao Weikang Lin Huijing Hu Peihang Li Runfeng Cao Long wang Lei Zhang Yunlang She bingyao Deng Weiyan Sun Chang Chen Dawei Li Nonwoven Technology Laboratory College of Textile Science and EngineeringJiangnan UniversityWuxi 214122JiangsuChina Department of Thoracic Surgery Shanghai Pulmonary HospitalTongji University School of MedicineShanghai 200092China Shanghai Engineering Research Center of Lung Transplantation Shanghai 200433China

Hydrogel fibers have gained considerable attention,but their large-scale production and industrial application are currently *** key lies in precise diameter control and industrial manufacturing with a straightforward,energy-saving,and efficient ***,we introduce a hydrodynamic drafting spinning platform inspired by water *** employs the rotation of a nonsolvent to generate vortices and further facilitate the efficient drafting of hydrogel *** sup-porting equipment,we have achieved impressive results,including scalable production capabilities(1 h,single channel output of 2×10^(3) m of fibers)and extensive ***,by simply regulating the velocity difference between fiber extrusion and fluid vortex,hydrogel fibers can be drafted to any diameter from about 1 mm to 5×10^(-2) mm(for chi-tosan system).Notably,this platform endows hydrogel fibers to carry functional hydrophilic or hydrophobic *** significant,these delicate hydrogel fibers seamlessly integrate with subsequent manufacturing *** allows the production of various end products,such as fiber bundles,yarns,fabrics,and ***,the immense potential in biomedical applications has been demonstrated after obtaining hydrogel fiber-based nonwoven as wound *** summary,the hydrodynamic drafting spinning platform offers an effective solution for the large-scale production of diameter-controllable,multifunctional hydrogel fibers.

关键词： Hydrogel fiber Hydrodynamic drafting spinning platform Large-scale production Gentle drafting Biomedical application

On the Socio-Economic Development Features on the Fringe Areas of Large Cities in 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

China City Planning Review 1992年第3期9卷 60-67页

作者： Lin bingyao Zhang Shuying Nanjing University Harbin Normal University

Regional studies are basically carried out in three areas. Studies on regional develop-ment theory, the characteristics and state of regional development, and on decision mak-ing and policy, In recent years, regional development theories were introduced to China,such as growth pole theory, gradient theory, and central place theory, etc. Much benefi-cial work has been done concerning these theories. Much exploration has also been madeon decision-making and policy studies in connection with regional, territorial and cityplanning. However, not much has been done with regard to the research on the character-istics and state of regional development and most of them are descriptive. Therefore, thereis a lack of guiding theory for decision-making and policy studies and also a lack of re-search, on regional characteristics and state, which has inevitably resulted in erroneousdecision-making and reform measures. The stepping up of research on the charecteristicsand state plays a key role in raising, the regional scientific research level. In this article, theauthors concentrate their research on the city fringe areas and try to explore thesocio-economic features and state of these particular areas.

关键词： On the Socio-Economic Development Features on the Fringe Areas of Large Cities in China