检索结果-南通市图书馆

Rare Metals 2022年第1期41卷 144-154页

作者： Li-Juan Chen Ting-Ting Liu Shu-Ming Liu Sheng Cai Xiao-Xiao Zou Jing-Wen Jiang Zhi-Yuan Mei Gen-Fu Zhao Xiao-Fei Yang Hong Guo School of Materials and energy Yunnan UniversityKunming 650091China nanomaterials and energy lab Department of Mechanical and Materials EngineeringWestern UniversityLondonON N6A 5B9Canada

The conversion of CO_(2)into CO,CH_(4)and other hydrocarbons through solar energy can alleviate the energy shortage *** design a novel photocatalyst with S defects CuIn_(5)S_(8)@MoSe_(2)hollow *** interlayerexpanded MoSe_(2)can increase the adsorption of *** unique hollow structure can improve the light utilization efficiency and the electron–holes ***_(5)S_(8)with S vacancies in bimetallic sites has high selectivity and photocatalytic reduction of CO_(2)***,S vacant CuIn_(5)S_(8)confined in a few-layers MoSe_(2)with interlayer-expanded hollow heterostructures exhibit super performance for photocatalytic CO_(2)*** 8-h light reaction,the outputs of CO and CH_(4)for the 15.3 wt%CuIn_(5)S_(8)@MoSe_(2)sample containing S vacancies(Vs)are 30.4 and 14.7 lmol·g^(-1),*** mechanism is also investigated in detail through in situ Fourier transform infrared spectroscopy technology.

关键词： Sulfur vacancy CuIn_(5)S_(8) MoSe_(2)heterojunction Photocatalytic CO_(2)reduction

The new face of iron oxide nanoparticles: the bullets targeting tumor microenvironment for cancer therapy

在线全文

学校读者我要写书评

暂无评论

Science Bulletin 2016年第23期61卷 1788-1790页

作者： Jinxia Li Feng Zhao Chunying Chen CAS Key laboratory for Biomedical Effects of nanomaterials and Nanosafety Institute of High Energy Physics Chinese Academy of Sciences CAS Key laboratory for Biomedical Effects of nanomaterials and Nanosafety National Center for Nanoscience and Technology

Ferumoxytol, an iron replacement product in clinic practices, is an agent of superparamagnetic iron oxide nanoparticles coated with polyglucose sorbitol carboxymethylether. It is approved for the intravenous therapy o... 详细信息

关键词：铁纳米粒子肿瘤治疗氧化微环境子弹缺铁性贫血临床实践替代产品

Growth and in situ transformation of TiO2 and HTiOF3 crystals on chitosan-polyvinyl alcohol co-polymer substrates under vapor phase hydrothermal conditions

在线全文

学校读者我要写书评

暂无评论

Nano Research 2016年第3期9卷 745-754页

作者： Tianxing Wu Guozhong Wang Xiaoguang Zhu Porun Liu Xian Zhang Haimin Zhang Yunxia Zhang Huijun Zhao Key laboratory of Materials Physics Centre for Environmental and Energy Nanomaterials Anhui Key Laboratory of Nanomaterials and Nanostructures Institute of Solid State Physics Chinese Academy of Sciences Hefei 230031 China Centre for Clean Environment and energy Gold Coast Campus Griffith University Queensland 4222 Australia

A chitosan-polyvinyl alcohol （CS/PVA） co-polymer substrate possessing a large number of amino and hydroxyl groups is used as a substrate to induce the direct growth and in situ sequential transformation of fitanate crystals under HF vapor phase hydrothermal conditions. The process involves four distinct formation/ transformation stages. HTiOF3 crystals with well-defined hexagonal shapes are formed during stage I, and are subsequently transformed into {001} faceted anatase TiO2 crystal nanosheets during stage II. Interestingly, the formed anatase TiO2 crystals are further transformed into cross-shaped and hollow square- shaped HTiOF3 crystals during stages III and IV, respectively. Although TiO2 crystal phases and facet transformations under hydrothermal conditions have been previously reported, in situ crystal transformations between different titanate compounds have not been widely reported. Such crystal formation/ transformations are likely due to the presence of large numbers of amino groups in the CS/PVA substrate. When celluloses possessing only hydroxyl groups are used as a substrate, the direct formation of {001} faceted TiO2 nanocrystal sheets is observed （rather than any sequential crystal transformations）. This substrate organic functional group-induced crystal formation/transformation approach could be applicable to other material systems.

关键词： vapor phasehydrothermal synthesis crystal transformation titanate compounds

A versatile solution-phase, precursor route to surface-mazelike hierarchical structures

维普期刊数据库评论

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 2015年第4期58卷 620-626页

作者： Ji Ma Lianchao Han Kezheng Chen lab of Functional and Biomedical nanomaterials College of Materials Science and Engineering Qingdao University of Science and Technology

In this work, surface-mazelike Zn O, Cu, and Ni hierarchical structures were synthesized via a versatile ethylene glycol- mediated solvothermal method. The structure evolution of these materials bore striking similarities, including(1) initial formation of metal alkoxides precursors and(2) subsequent structural evolution of products from tiered plates to jigsaw puzzles; then to extrusion ridges, nests and spindles; and thereafter to final mazelike structures driven by persistent thermal decomposition of preformed precursors. Based on their unique surface morphologies in sinuous asymmetry, it is anticipated that such mazelike hierarchical structures may shed new light on the development of morphology-controlled adsorption and heterogeneous catalysts.

关键词： hierarchical structure versatile precursor route mazelike solvothermal adsorption

Synthesis, Crystal Structure and Hydrogenation Catalysis of a CF_3-BINAP(O)-Rh-COD Complex

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2012年第11期31卷 1669-1675页

作者：杨红芬卢伟刘蕾刘宇吴海臣 Key laboratory for Biomedical Effects of nanomaterials & Nanosafety Institute of High Energy Physics Chinese Academy of Sciences

The complex [（CF3-BINAP（O））Rh（COD）][ClO4]·Et2O （2, CFa-BINAP（O） = 2- {bis[3,5-bis（trifluoromethyl）phenyl]phosphino } -2 ＇- {bis [3,5-bis（trifluoromethyl）phenyl]phosphinyl } -1,1、-binaphthyl, COD = 1,5-cyclooctadiene） was obtained directly from the reaction of CF3- BINAP（O） ligand with [Rh（COD）][C104]. Complex 2 has been characterized by single-crystal X-ray diffraction. The crystal adopts space group P21/n with a = 19.0727（4）, b = 15.6275（4）, c = 22.3039（6） A, fl = 112.3570（10）°, V= 6148.2（3） A3, Z = 4, Dc = 1.693 g/cm3, F（000） = 3144, μ（MoKa） = 0.500 mm-1, the final R = 0.0947 and wR = 0.2501. Structural studies reveal that Rh（I） is coordinated by one oxygen and one phosphorus in the same ligand. Asymmetric hydrogenation of acetami- docinnamic acid with compound 2 was also evaluated.

关键词： BINAP(O) ligand rhodium complex crystal structure asymmetric hydrogenation

Screening hydroxyapatite for cadmium and lead immobilization in aqueous solution and contaminated soil:The role of surface area

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2017年第2期29卷 141-150页

作者： Hongying Li Xisheng Guo Xinxin Ye Institute of Soil and Fertilizer Anhui Academy of Agricultural Sciences Key laboratory of Materials Physics Centre for Environmental and Energy Nanomaterials Anhui Key Laboratory of Nanomaterials and Nanotechnology Institute of Solid State Physics Chinese Academy of Sciences

Hydroxyapatite（HAP） has been widely used to immobilize many cationic metals in water and soils. The specific reason why an increase in the surface area of HAP enhances cadmium（Cd） uptake, but has no effect on lead（Pb） uptake, is not clear. The aim of this study was to determine the factors causing the differences in sorption behavior between Cd and Pb by evaluating HAPs with different surface areas. We synthesized HAPs with two different surface areas, which were characterized by X-ray diffraction, N2 adsorption, and scanning electron microscopy, and then evaluated them as sorbents for Cd and Pb removal by testing in single and binary systems. The sorption capacity of large surface area HAP（1.85 mmol/g） for Cd in the single-metal system was higher than that of small surface area HAP（0.64 mmol/g）, but there were no differences between single- and binary-metal solutions containing Pb. After the Cd experiments, the HAP retained a stable structure and intact morphology, which promotes the accessibility of reactive sites for Cd. However, a newly formed precipitate covered the surface and blocked the channels in the presence of Pb, which reduced the number of potential adsorption sites on HAP for Cd and *** experiments using Cd- and Pb-contaminated soil produced similar results to the solution tests. These results indicate that alterations of the structure and morphology during the reaction is an important factor influencing metal sorption to HAP.

关键词： Hydroxyapatite Cadmium Lead Remediation Structure and morphology

Vapor-phase hydrothermal growth of single crystalline NiS2 nanostructure film on carbon fiber cloth for electrocatalytic oxidation of alcohols to ketones and simultaneous H2 evolution

在线全文

学校读者我要写书评

暂无评论

Nano Research 2018年第2期11卷 1004-1017页

作者： Tianxing Wu Xiaoguang Zhu Guozhong Wang Yunxia Zhang Haimin Zhang Huijun Zhao Key laboratory of Materials Physics Centre for Environmental and Energy Nanomaterials Anhui Key Laboratory of Nanomaterials and Nanotechnology CAS Center for Excellence in Nanoscience Institute of Solid State Physics Chinese Academy of Sciences Hefei China Centre for Clean Environment and energy Griffith University Gold Coast Campus Nathan Australia

Electrocatalytic synthesis of value-added chemicals is attracting significant research attention owing to its mild reaction conditions, environmental benignity, and potentially scalable application to organic synthetic chemistry. Herein, we report the preparation of a single-crystalline NiS2 nanostructure film of N 50 nm thickness grown directly on a carbon fiber doth （NiSJCFC） by a facile vapor-phase hydrothermal （VPH） method. NiSJCFC as an electrocatalyst exhibits activity for both the oxygen evolution reaction （OER） and the hydrogen evolution reaction （HER） in alkaline media. Furthermore, a series of alcohols （2-propanol, 2-butanol, 2-pentanol, and cyclohexanol） were electrocatalytically converted to the corresponding ketones with high selectivity, efficienc and durability using the NiSJCFC electrode in alkaline media. In the presence of 0.45 M alcohol, a remarkably decreased overpotential （- 150 mV, vs. RHE） at the NiS2/CFC anode compared with that for water oxidation to generate O2, i.e., the OER, in alkaline media leads to significantly improved H2 generation. For instance, the H2 generation rate in the presence of 0.45 M 2-propanol is almost 1.2-times of that obtained for pure water splitting, but in a system that employs an applied voltage at least 280 mV lower than that required for water splitting to achieve the same current density （20 mA-crn-2）. Thus, our results demonstrate the applicability of our bifunctional non-precious-metal electrocatalyst for organic synthesis and simultaneous H2 production.

关键词： vapor-phase hydrothermal single-crystalline NiS2 film carbon fiber cloth electrocatalytic oxidationof alcohols to ketones H2 generation

Probing the interaction at nano-bio interface using synchrotron radiation-based analytical techniques

维普期刊数据库评论

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 2015年第5期58卷 768-779页

作者： Bing Wang Weiyue Feng Zhifang Chai Yuliang Zhao CAS Key laboratory for Biomedical Effects of nanomaterials and Nanosafety CAS Key laboratory of Nuclear Radiation and Nuclear energy Technology Institute of High energy Physics Chinese Academy of Sciences

Understanding the interactions of nanomaterials(NMs) with biomolecules, organelles, cells, and organic tissues at the nano-bio interface can offer important information for their uptake, distribution, translocation, metabolism and degradation in vitro and in vivo, which can help to precisely tune and design "smart" NMs for biomedical applications. However, probing the interactions at the nano-bio interface, which generally requires dedicated analytical methods and tools, is remarkably complicated due to the dynamically changed nature of the nano-bio interface. Because of the advantages of high spatial resolution, high sensitivity, excellent accuracy, low matrix effects and non-destructiveness, synchrotron radiation(SR)-based analytical techniques have become extremely valuable tools. Herein, we present a comprehensive overview of SR-based techniques for the visualized study of NMs at cellular and subcellular interfaces and their transformation in vitro; the exploration of biodistribution, translocation, metabolism and degradation of NMs in vivo; and clarification of the molecular mechanisms of NMs' reactions with biomolecules. Rapid development of advanced light source means that in situ, real-time analysis of NMs at the nano-bio interface will be achieved.

关键词： nano-bio interface synchrotron-radiation-based analytical techniques interaction

Advances in Investigation of Fe-based Glass-forming Alloy Melts

在线全文

学校读者我要写书评

暂无评论

Journal of Iron and Steel Research International 2016年第6期23卷 509-515页

作者： Hui GAO Bang-shao DONG Shao-xiong ZHOU Advanced Technology & Materials Co. Ltd.Beijing Key Laboratory of Energy NanomaterialsCentral Iron & Steel Research Institute

Continuous precision casting is an important trend in modern *** effects in glassforming metallic liquids tremendously influence the properties of rapidly quenched ribbons;therefore,much attention has been paid to the study of Fe-based glass-forming melts at high *** investigations of these melts are categorized and *** is concluded that more efforts are still required to reveal the discipline of amorphization brought about by rapid quenching of Fe-based glass-forming melts.

关键词： metallic amorphous heating subsequent quenching viscosity discipline melting glasses crystalline

'Ship-in-a-Bottle' Approach to Synthesize Ag@hm-SiO2 Yolk/Shell Nanospheres

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Physics 2015年第5期28卷 -页

作者： Wei-qiang Li Guo-zhong Wang Guang-hai Li Yun-xia Zhang Key laboratory of Materials Physics Centre for Environmental and Energy Nanomaterials and Anhui Key Laboratory of Nanomaterials and Nanotechnology Institute of Solid State Physics Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei 230031 China Key laboratory of Materials Physics Centre for Environmental and Energy Nanomaterials and Anhui Key Laboratory of Nanomaterials and Nanotechnology Institute of Solid State Physics Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei 230031 ChinaSchool of Chemistry and Materials Science University of Science and Technology of China Hefei 230026 China

An effective protocol is presented for the synthesis of Ag@hm-SiO2 yolk/shell nanostructures (YSNs) via a facile “ship-in-a-bottle” method. TEM observations show that the as-obtained Ag@hm-SiO2 YSNs have a single silver core in the interior of hollow mesoporous silica (hm-SiO2) nanospheres, in which the thickness of hm-SiO2 outer shell is about 14 nm and the silver core has an average size of about 43 nm. And the content of silver in Ag@hm-SiO2 YSNs is about 10.29% based on the inductively coupled plasmameasurement. The as-synthesized Ag@hm-SiO2 YSNs exhibited significantly enhanced catalytic performance compared with the pure Agnanoparticles toward the reduction of 4-nitrophenol to 4-aminophenol in the presence of NaBH4.

关键词： Ag@hm-SiO2 Yolk/shell Ship-in-a-bottle Nanoreactor