检索结果-南通市图书馆

Ni-based catalysts derived from layered-double-hydroxide nanosheets for efficient photothermal CO_(2) reduction under flow-type system

在线全文

学校读者我要写书评

暂无评论

Nano Research 2021年第12期14卷 4828-4832页

作者： Zhenhua Li run shi Jiaqi Zhao Tierui Zhang College of Chemistry Central China Normal UniversityWuhan430079China Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing100190China Key Laboratory of Thermal Management and Energy Utilization of Aircraft Ministry of Industry and Information TechnologyNanjing210016China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100049China

Photothermal CO_(2) reduction is an efficient and sustainable catalytic path for CO_(2) ***,we successfully fabricated a novel series of Ni-based catalysts(Ni-x)via H2 reduction of NiAl-layered double hydroxide nanosheets at temperatures(x)ranging from 300 to 600°*** the increase of the reduction temperature,the methane generation rate of the Ni-x catalyst for photothermal CO_(2) hydrogenation gradually increased under ultraviolet-visible-infrared(UV-vis-IR)irradiation in a flow-type *** Ni-600 catalyst showed a CO_(2) conversion of 78.4%,offering a CH4 production rate of 278.8 mmol·g^(−1)h−1,with near 100%selectivity and 100 h long-term *** characterization analyses showed metallic Ni nanoparticles supported on amorphous alumina are the catalytically active phase for CO_(2) *** study provides a possibility for large-scale conversion and utilization of CO_(2) from a sustainable perspective.

关键词： photothermal CO_(2)hydrogenation Ni-based catalysts layered double hydroxide photocatalysis solar-to-fuel

Revealing active sites in N-doped carbon for CO2 electroreduction by well-defined molecular model catalysts

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science Bulletin 2020年第10期65卷 781-782,M0003页

Carbon capture and utilization (CCU) may offer a response to the global challenge in greenhouse-gas involved climate *** CO2 reduction reaction (CO2RR) powered by renewable electricity is emerging as an innovative CCU... 详细信息

关键词：还原活性 convert CCU

A unified model of cusp spot, High Latitude Dayside aurora (HiLDA)/(Space Hurricane), and 15MLT-PCA

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Earth and Planetary Physics 2023年第4期7卷 513-519页

作者： DeSheng Han YaTing Xiong run shi HuiXuan Qiu HuiTing Feng State Key Laboratory of Marine Geology School of Ocean and Earth ScienceTongji UniversityShanghai 200092China

Cusp spot,High Latitude Dayside aurora(HiLDA),‘space hurricane’,and 15MLT-PCA(Polar Cap Arc observed around 15:00 Magnetic Local Time)are mesoscale auroral structures observed in the polar cap *** share many common properties and,at the same time,have notable differences.A 15MLT-PCA is a polar cap arc connected to the auroral oval,but the others are auroral spots detached from the oval.A cusp spot differs from a HiLDA in local time location.A space hurricane differs from a HiLDA in having spiral-arm *** now,relationships among these auroras have not been depicted *** we propose a unified model,based on lobe reconnection,that encompasses their similarities and *** then provide critical supporting evidence for the *** model suggests that different reconnection sites under different IMF conditions result in these differently-appearing auroral *** model explains all the characteristic features of these auroras and has implications for understanding the dawn/dusk and inter-hemispheric asymmetries observed in their occurrence *** anticipate confirmation of the model by observations to be made during the Solar wind-Magnetosphere-Ionosphere Link Explorer(SMILE)***,since the model indicates that these auroras appear on the footprint of the poleward cusp boundary,we expect data from the SMILE mission to make it possible to estimate the approximate shape of the cusp.

关键词： polar cap aurora 15MLT-PCA HiLDA cusp spot

Progress and Prospect of Photothermal Catalysis

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2022年第3期38卷 723-734页

作者： DU shihao BIAN Xuanang ZHAO Yunxuan shi run ZHANG Tierui Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing100090P.R.China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing100149P.R.China

Recently,solar-driven synthesis due to its energy-saving and environmentally friendly advantages has attracted more and more attention,whereas the low solar-to-chemical conversion efficiency significantly hindered its *** effective options that fully utilize full-band sunlight are urgently *** photothermal catalysis combined with the advantages of photocatalysis and thermalcatalysis can improve the utilization efficiency of solar energy and lower the reaction temperature,thus becoming a promising *** review divides photothermal catalysis into photo-assisted thermalcatalysis,thermal-assisted photocatalysis,and photothermal synergistic ***,the catalytic mechanical understanding of how photothermal affects the catalytic property of different applications(e.g.,water splitting,CO_(2)/N_(2) reduction,and environmental treatment)was also summed up and discussed in *** discussion ends with unsolved challenges in photothermal catalysis,particularly emphasizing the effect of temperature or sunlight on catalytic performance.

关键词： Photothermal catalysis Photocatalysis Solar Fuel Environment

Palladium membrane electro-hydrogenation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Innovation 2022年第6期3卷 15-16页

作者： Yining Ma run shi Tierui Zhang Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Palladium(Pd)plays a significant role in substantial catalytic *** account of the strong affinity for hydrogen,various Pd-based nanostructures with different shapes and sizes have been extensively utilized in hydrogenation *** particular,Pd reveals extraordinary properties while interacting with hydrogen,including strong adsorption,barrier-less dissociation,and large storage of hydrogen under ambient temperatures and pressures.

关键词： Palladium hydrogenation utilized

Two-dimensional Sn2Ta2O7 nanosheets as efficient visible lightdriven photocatalysts for hydrogen evolution

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2019年第5期38卷 397-403页

作者： Xiao-Shuai Wang Chao Zhou run shi Qin-Qin Liu Tie-Rui Zhang School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Two-dimensional Sn2Ta2O7 nanosheets with a thickness of^10 nm were successfully prepared through a novel tantalic acid-based solid-state reaction method at reduced *** as-obtained samples were characterized by powder X-ray diffraction(XRD),ultraviolet–visible(UV–Vis)diffuse reflectance spectra,scanning electron microscopy(SEM),transmission electron microscopy(TEM)and Brunauer–Emmett–Teller(BET)*** photocatalytic performance of Sn2 Ta2 O7 nanosheets was evaluated by photocatalytic water splitting for hydrogen evolution under visible light irradiation(k C 400 nm).The Sn2Ta2O7 nanosheets with a large surface area of 25.9 m^2·g^-1 showed higher H2 production activity,which was about 4.4 times higher than that of bulk Sn2 Ta2O7 in lactic acid aqueous solutions using Pt as a *** improved photocatalytic performance mainly benefited from the nanosheet structure,which provided abundant surface active sites and facilitated the photogenerated charge carrier separation *** workmay open up new opportunity to develop novel nanostructured tantalum-based semiconductors with improved catalytic performance for solar energy conversion.

关键词： Sn2Ta2O7 Nanosheets Visible light Photocatalysis Hydrogen evolution

Study of Difference-Expansion Embedding Schemes

在线全文

学校读者我要写书评

暂无评论

Journal of Electronic Science and Technology 2017年第3期15卷 211-216页

作者： Ke Mao Chin-Feng Lee Chin-Cheng Chang run-Hua shi the School of Computer Science and Technology Anhui UniversityHefei 230601 the Department of Information Management Chaoyang University of TechnologyTaichung 41349 the Department of Information Engineering and Computer Science Feng Chia UniversityTaichung 40724

Difference expansion（DE） is one of the famous schemes in the field of reversible data *** the high efficiency and simplicity,DE also has received more attention over the *** has a good information capacity,but due to its major location map,the pure payload is rather *** many scholars did relevant improvements which let n pixels as a unit instead of the original two pixels as a unit and can adaptively adjust the number of embedding secret information according to the smoothness degree of the block,which achieves the result of improving the information payload or the image *** this paper,the study of DE-based reversible data hiding schemes is comprehensively *** performance of DEbased schemes is evaluated and compared in terms of embedding capacity and stego-image quality.

关键词： Index Terms-Difference expansion integertransform reversible data hiding steganography

Layered double hydroxide-based photocatalytic materials toward renewable solar fuels production

在线全文

学校读者我要写书评

暂无评论

InfoMat 2021年第7期3卷 719-738页

作者： Xuanang Bian Shuai Zhang Yunxuan Zhao run shi Tierui Zhang Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijingChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijingChina

Photocatalysis is an ideal and promising green technology to drive numerous chemical reactions for valued chemicals production under very mild conditions,thereby providing solutions to global energy and environment issues related to burning fossil *** the past decade,layered double hydroxides(LDHs),as the members in two-dimensional materials family,have attracted much attention due to their many advantages in photocatalysis,such as facile synthesis,low cost and powerful tunability of *** this review,we provide a synthetic overview of recent research advances of LDH-based photocatalysts,with the main discussion of the design strategies to improve their photocatalytic performance,including component control,defect engineering,hybridization,and topological ***-performance correlations and tailor-made material synthesis strategies are elaborated to discuss how to realize high-performance LDH-based photocatalysts for three important reactions(i.e.,water splitting,CO_(2)conversion,and N2 reduction)to generate desirable solar ***,the remaining challenges and future perspectives of LDH-based photocatalysts are summed up,aiming to inspire brand new solutions for pushing forward the development of LDH-based photocatalysis.

关键词： component control defect engineering layered double hydroxide photocatalysis solar fuels

Template-free large-scale synthesis of g-C3N4 microtubes for enhanced visible light-driven photocatalytic H2 production

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2018年第6期11卷 3462-3468页

作者： Chao Zhou run shi Lu Shang Li-Zhu Wu Chen-Ho Tung Tierui Zhang Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China

A template-free hydrothermal-assisted thermal polymerization method has been developed for the large-scale synthesis of one-dimensional （1D） graphitic carbon nitride （g-C3N4） microtubes. The g-C3N4 microtubes were obtained by simple thermal polymerization of melamine-cyanuric acid complex microrods under N2 atmosphere, which were synthesized by hydrothermal treatment of melamine solution at 180℃ for 24 h. The as-obtained g-C3N4 microtubes exhibited a large surface area and a unique one-dimensional tubular structure, which provided abundant active sites for proton reduction and also facilitated the electron transfer processes. As such, the g-C3N4 microtubes showed enhanced photocatalytic H2 production activity in lactic acid aqueous solutions under visible light irradiation （A 〉 420 nm）, which was - 3.1 times higher than that of bulk g-C3N4 prepared by direct thermal polymerization of the melamine precursor under the same calcination conditions.

关键词： graphitic carbon nitride(g-C3N4)microtubes photocatalytic water splitting visible light response