检索结果-南通市图书馆

Amine facilitates the synthesis of silica-supported ultrasmall bimetallic nanoparticles

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China Materials 2018年第8期61卷 1129-1131页

作者： nanfeng zheng Pengxin Liu Collaborative Innovation Center of Chemistry for Energy Materials State Key Laboratory for Physical Chemistry of Solid Surfaces and Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University

Supported catalysts based on metal nanoparticles are a class of widely used heterogeneous catalysts in *** catalytic performances of supported metal catalysts are highly determined by many parameters of metal nanopart... 详细信息

关键词： Amine facilitates the synthesis of silica-supported ultrasmall bimetallic nanoparticles

Multifunctional ultrasmall Pd nanosheets for enhanced near-infrared photothermal therapy and chemotherapy of cancer

在线全文

学校读者我要写书评

暂无评论

Nano Research 2015年第1期8卷 165-174页

作者： Shaoheng Tang Mei Chen nanfeng zheng State Key Laboratory for Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials andDepartment of Chemis try College of Chemistry and Chemical Engineering Xiamen University Xiamen Fujian 361005 China

Near-infrared （NIR） photothermal therapy has developed very quickly in recent years. However, its clinical applications are hindered by many practical problems, such as low accumulation in tumors, high laser power density and high biotoxicity in vivo. Herein, a versatile system combining chemotherapy with photothermal therapy for cancer therapy using ultrasmall Pd nanosheets （SPNS） has been developed. The SPNS can serve as pH-responsive drug carriers to efficiently deliver DOX into cancer cells and tumors. On the other hand, the coordinative loading of DOX on SPNS enhances its accumulation in tumor tissue. So we can efficiently ablate tumor using low-intensity laser radiation. Importantly, with ultrasmall size （-4.4 nm）, SPNS surface-functionalized with reduced glutathione （GSH） can be cleared from the body through the renal system into the urine. This cancer therapeutic nanosystem, which exhibits a significant synergistic effect and low systemic toxicity, has great potential for clinical applications.

关键词： photothermal therapy chemotherapy Pd nanosheets drug delivery synergistic effect

Special topic on strategies for developing energy-related physical chemistry

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 China Chemistry 2017年第11期60卷 1377-1378页

作者： Zhong-Qun Tian nanfeng zheng Collaborative Innovation Center of Chemistry for Energy Materials State Key Laboratory for Physical Chemistry of Solid Surfacesand Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

Increasing global energy demand and environment issue have pushed us to develop technologies for efficient utiliza- tion of fossil fuels and also seek for renewable energy re- sources. Chemistry plays a crucial role in the acquisition, generation, distribution, and utilization of energy in differ- ent forms although it is not the only contributing subject. Currently, fossil fuels are the primary source to provide the majority of the world＇s energy. While the efficient utiliza- tion of fossil fuels requires deep understanding of the ener- gy transformation processes associated with the breaking and reorganization of chemical bonds, the use of many re- newable energy resources often involves chemical trans- formations with electron transfer. For these reasons, energy chemistry has been recently emerging as a new interdisci- plinary area to address chemistry issues associated with energy technologies.

关键词：可再生能源化学战专题物理化石燃料高效利用重组技术环境问题

Regulating the Deposition of Insoluble Sulfur Species for Room Temperature Sodium-Sulfur Batteries

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1期38卷 128-135页

作者： WANG Chaozhi CUI Jingqin FANG Xiaoliang zheng nanfeng Pen-Tung Sah Institute of Micro-Nano Science and Technology State Key Laboratory for Physical Chemistry of Solid SurfacesCollaborative Innovation Center of Chemistry for Energy MaterialsNational&Local Joint Engineering Research Center for Preparation Technology of NanomaterialsCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005P.R.China Fujian Science&Technology Innovation Laboratory for Energy Materials of China Xiamen 361005P.R.China

Room temperature sodium-sulfur(RT-Na-S) batteries are regarded as promising candidates for next-generation high-energy-density batteries. However, in addition to the severe shuttle effect, the inhomogeneous deposition of the insoluble sulfur species generated during the discharge/charge processes also contributes to the rapid capacity fade of RT-Na-S batteries. In this work, the deposition behavior of the insoluble sulfur species in the traditional slurry-coated sulfur cathodes is investigated using microporous carbon spheres as model sulfur host materials. To achieve uniform deposition of insoluble sulfur species, a self-supporting sulfur cathode fabricated by assembling microporous carbon spheres is designed. With homogeneous sulfur distribution and favorable electron transport pathway, the self-supporting cathode delivers remarkably enhanced rate capability(509 mA·h/g at 2.5 C, 1 C=1675 mA/g), cycling stability(718 mA·h/g after 480 cycles at 0.5 C) and areal capacity(4.98 mA·h/cm2 at 0.1 C), highlighting the great potential of manipulating insoluble sulfur species to fabricate high-performance RT-Na-S batteries.

关键词： Sodium sulfur battery Polysulfide Discharge/charge product High sulfur loading Stable cycling

Facile synthesis of size-tunable ZIF-8 nanocrystals using reverse micelles as nanoreactors

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 China Chemistry 2014年第1期57卷 141-146页

作者： ZHAO XiaoJing FANG XiaoLiang WU BingHui zheng LanSun zheng nanfeng State Key Laboratory for Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Pen-Tung Sah Institute of Micro-Nano Science and Technology Xiamen University

This paper describes a robust method for the synthesis of high-quality ZIF-8 nanocrystals using reverse micelles as discrete nanoscale *** precise size control of ZIF-8 nanocrystals is conveniently achieved by tuning the concentration of precursors,reaction temperatures,the amount of water,and the structure of *** as-synthesized ZIF-8 nanocrystals are of narrow distribution and tunable size.A size-dependent catalytic activity for Knoevenagel condensation reaction is further demonstrated by using ZIF-8 nanocrystals with different sizes as the *** facile method opens up a new opportunity in the synthesis of various ZIFs nanocrystals.

关键词： ZIF-8,nanocrystals,reverse micelles,catalysis

Two-dimensional Pd-based nanomaterials for bioapplications

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2017年第8期62卷 579-588页

作者： Xiaolan Chen Saige Shi Jingping wei Mei Chen nanfeng zheng State Key Laboratory for Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials and Engineering Research Center for Nano-Preparation Technology of Fujian Province College of Chemistry and Chemical Engineering Xiarnen University Xiarnen 361005 China

Noble metal nanomaterials have been extensively explored in cancer diagnostic and therapeutic applica- tions owing to their unique physical and chemical properties, such as facile synthesis, straightforward surface functionalization, strong photothermal effect, and excellent biocompatibility. Herein, we summa- rize the recent development of two-dimensional （2D） Pd-based nanomaterials and their applications in cancer diagnosis and therapy. Different synthetic strategies for Pd nanosheets and the related nanostruc- tures, including Pd@Au, Pd@Ag nanoplates and mesocrystalline Pd nanocomlla, are first discussed. Together with their unique properties, the potential bioapplications of these 2D Pd nanomaterials are then demonstrated. With strong absorption in near-infrared （NIR） region, these nanomaterials have great potentials in cancer photothermal therapy （PTr）. They also readily act as contrast agents in photoacoustic （PA） imaging or X-ray computed tomography （CT） to achieve image-guided cancer therapy. Moreover, significant efforts have been devoted to studying the combination of PTr and other treatment modalities （e.g., chemotherapy or photodynamic therapy） based on Pd nanomaterials. The remarkable synergistic or collaborative effects to achieve better therapeutic efficacy are discussed as well. Additionally, the biosaf- ety of 2D Pd-based nanomaterials in vitro and in vivo was evaluated. Finally, challenges for the applica- tions of Pd-based nanomaterials in cancer diagnosis and therapy, and future research prospects are highlighted.

关键词： 2D nanomaterials Palladium Optical properties Bioimaging Photothermal therapy Combination therapy

Hollow-in-hollow carbon spheres with hollow foam-like cores for lithium-sulfur batteries

在线全文

学校读者我要写书评

暂无评论

Nano Research 2015年第8期8卷 2663-2675页

作者： Jun Zang Taihua An Yajie Dong Xiaoliang Fang Mingsen zheng Quanfeng Dong nanfeng zheng Pen-Tung Sah Institute of Micro-Nano Science and Technology Xiamen University Xiamen 361005 China State Key Laboratory for Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials and Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China

Lithium-sulfur batteries have attracted increasing attention because of their high theoretical capadty. Using sulfur/carbon composites as the cathode materials has been demonstrated as an effective strategy to optimize sulfur utilization and enhance cycle stability as well. In this work hollow-in-hollow carbon spheres with hollow foam-like cores （HCSF@C） are prepared to improve both capability and cycling stability of lithium-sulfur batteries. With high surface area and large pore volumes, the loading of sulfur in HCSF@C reaches up to 70 wt.%. In the resulting S/HCSF@C composites, the outer carbon shell serves as an effective protection layer to trap the soluble polysulfide intermediates derived from the inner component. Consequently, the S/HCSF@C cathode retains a high capacity of 780 mAh/g after 300 cycles at a high charge/discharge rate of 1 A/g.

关键词： hollow spheres porous carbon sulfur/carbon cathode lithium-sulfur batteries

Supported Atomically Dispersed Pd Catalyzed Direct Alkoxylation and Allylic Alkylation

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 2024年第7期42卷 719-724页

作者： Ruixuan Qin Ziwen Chen Qingyuan Wu nanfeng zheng Pengxin Liu New Cornerstone Science Laboratory State Key Laboratory for Physical Chemistry of Solid SurfacesCollaborative Innovation Center of Chemistry for Energy Materialsand National&Local Joint Engineering Research Center of Preparation Technology of NanomaterialsCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamenFujian 361005China Innovation Laboratry for Scences and Technoogies of Energy Materials of Fujan Province(IKKM) Xiamen Fujian 361102China School of Physical Science and Technology Shanghai Tech UniversityShanghai 201210China Fujian Key Laboratory of Rare-earth Functional Materials Fujian Shanhai Collaborative Innovation Center of Rare-earth Functional MaterialsLongyanFujian 366300China

A new approach to allylic alkylation is realized using an atomically dispersed palladium catalyst(Pd1/TiO2-EG).Unlike conventional methods that require derivation of substrates and utilization of additives,this method allows for direct allylic alkylation from allylic alcohols,producing H2O as the sole *** catalyst's high efficiency is attributed to the local hydrogen bonding at the or-ganic-inorganic interface(Pd-EG interface),facilitating hydroxyl group activation forη3π-allyl complex *** system demonstrates successful direct C—O and C—C coupling reactions with high selectivity,requiring no *** study highlights the potential of supported atomically dispersed catalysts for greener and more efficient catalysis,meanwhile,offers unique insights into the distinct behavior of atomically dispersed catalysts in comparison to homogeneous or nanoparticle-based catalysts.

关键词： Atomically dispersed catalyst Alkylation C—C coupling Organic-inorganic Interface Hydrogen bond Tsuji-Trost reaction Green catalysis

Interfacial Activation of Catalytically Inert Au(6.7 nm)-Fe_(3)O_(4)Dumbbell Nanoparticles for CO Oxidation

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 2009年第12期2卷 975-983页

作者： Binghui Wu Hai Zhang Cheng Chen Shuichao Lin nanfeng zheng State Key Laboratory for Physical Chemistry of Solid Surfaces and Department of Chemistry College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

Au nanoparticles epitaxially grown on Fe_(3)O_(4)in Au(6.7 nm)-Fe_(3)O_(4)dumbbell nanoparticles exhibit excellent stability against sintering,but display negligible catalytic activity in CO *** from various supported Au(6.7 nm)-Fe_(3)O_(4)catalysts prepared by the colloidal deposition method,we have unambiguously identifi ed the significance of the Au-TiO_(2)interface in CO oxidation,without any possible size effect of *** situ thermal decomposition of TiO_(2)precursors on Au-Fe_(3)O_(4)was found to be an effective way to increase the Au-TiO_(2)interface and thereby optimize the catalytic performance of TiO_(2)-supported Au-Fe_(3)O_(4)dumbbell *** reducing the size of Fe_(3)O_(4)from 15.2 to 4.9 nm,the Au-TiO_(2)contact was further increased so that the resulting TiO_(2)-supported Au(6.7 nm)-Fe_(3)O_(4)(4.9 nm)dumbbell particles become highly efficient catalysts for CO oxidation at room temperature.

关键词： Gold nanocatalysts support effect CO oxidation Au-Fe_(3)O_(4) dumbbell nanoparticles