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Chinese Chemical Letters 2011年第2期22卷 217-220页

作者： Rui Xue Li Shu Mei Liu Jian Qing Zhao Hideyuki Otsuka Atsushi Takahara College of Materials Science and Engineering South China University of TechnologyGuangzhou510640China Institute for Materials Chemistry and Engineering Kyushu UniversityFukuoka 819-0395Japan

Cross-linkedβ-cyclodextrin polymer/Fe3O4 composite nanoparticles with core-shell structures were prepared via cross linking reaction on the surface of carboxymethylβ-cyclodextrin（CM-β-CD） modified Fe3O4 nanoparticles inβ-cyclodextrin alkaline solution by using epichlorohydrin as crosslinking *** morphology,structure and magnetic properties of the prepared composite nanoparticles were investigated by transmission electron microscopy（TEM）,Fourier transform infrared（FTIR） spectrometry,X-ray diffraction（XRD） measurement,thermogravimetric analysis（TGA） and Vibrating sample magnetometry （VSM）,respectively.

关键词： Cross-linkedβ-cyclodextrin polymer Fe3O4 nanoparticles Composite nanoparticles core-shell structures

Constructing hierarchical arrays with core-shell metal oxides@metal coordination polymers for efficient and stable overall water splitting

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Nano Research 2024年第6期17卷 4882-4888页

作者： Shuai Qi Jinlian Liao Kunzhong Chen Senkai Li Jinwen Zhao Tianchi Huang Na Meng Hengpan Yang Qi Hu Chuanxin He College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China

Developing non-precious metal-based bifunctional electrocatalysts capable for both hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)is essential to achieve efficient water electrolysis for mass hydrogen production,however it remains ***,we report the synthesis of hierarchical nanorod arrays comprising core-shell structured P-doped NiMoO4@NiFe-coordination polymer(denoted as P-NiMoO4@NiFeCP)as bifunctional electrocatalysts for water ***,we systematically investigate the influence of NiFeCP shell thickness on electrocatalytic activity,manifesting the presence of strong interfacial synergetic effect between P-NiMoO4 and NiFeCP for boosting both the HER and *** advantageous hierarchical architectures and unique core-shell structures,optimized P-NiMoO_(4)@NiFeCP-7.3(7.3 is the shell thickness in nm)requires overpotentials of merely 256 and 297 mV to yield a current density of 1000 mA·cm^(−2)for the HER and OER in 1 M KOH,*** importantly,it can serve as a bifunctional electrocatalyst for efficient and sustainable overall water electrolysis,delivering large current densities of 500 and 1000 mA·cm^(−2)at low cell voltages of 1.804 and 1.865 V,along with high stability of over 500 h at 1000 mA·cm−2,demonstrating the great potential of this electrocatalyst towards practical applications.

关键词： hydrogen evolution reaction oxygen evolution reaction overall water splitting non-precious metal-based electrocatalysts core-shell structures

Catechol-Formaldehyde Resin Coated CdS core-shell Composite as Robust Photocatalyst for Long-Term Sustainable Artificial Photosynthesis of H_(2)O_(2)

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Chinese Journal of Chemistry 2024年第17期42卷 1975-1985页

作者： Yuexin Xiang Zhinan Xia Wanchao Hu Cuiyan Tong Yang Xiao Changli Lu Institute of Chemistry Northeast Normal UniversityChangchunJilin130024China

Catechol-formaldehyde resin(CFR)is very attractive for H_(2)O_(2) production via the catalytic ***,the H2O2 formation is accompanied by the oxidation of catechol groups to o-benzoquinone groups on CFR,which will cause irreversible damage to CFR and greatly limit its long-term stable catalytic ***,CdS/CFR composite photocatalyst with a core-shell structure was synthesized by hydrothermal *** photogenerated electrons of Cds are used as a powerful driving force for the reversible redox conversion between catechol groups and o-benzoquinone groups on the CFR.

关键词： Hydrogen peroxide Photocatalysis Catechol-formaldehyde resin Cds core-shell structures Oxygen reduction reaction Charge transfer Heterogeneous catalysis

Preparation of W-TiC alloys from core-shell structure powders synthesized by an improved wet chemical method

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Rare Metals 2023年第4期42卷 1378-1386页

作者： Shao-Ting Lang Qing-Zhi Yan Ning-Bo Sun Xiao-Xin Zhang Institute of Nuclear Materials University of Science and Technology BeijingBeijing100083China

In order to improve the homogeneous distribution of the TiC particles and facilitate the TiC particles to distribute in the tungsten grain interiors,two kinds of TiCdoped tungsten precursors with a core-shell structure were prepared by an improved wet chemical method at different reaction temperature ***,fine platelike precursor(200-400 nm)and flower-like precursor(approximately 1.25μm)are *** reduction and sintering,the microstructures of the samples were characterized by scanning electron microscopy and transmission electron *** the sample sintered from the platelike precursor,TiC particles with sizes in the range of40-300 nm and an average size of approximately 80 nm were uniformly distributed in the tungsten matrix with a high share in the grain ***,in the sample sintered from the flower-like precursor,the TiC particles with sizes in the range of 50-700 nm are significantly aggregated and non-uniformly distributed in the tungsten *** a result,the sample sintered from the plate-like precursor achieves higher mechanical properties and a much narrower range of bending strength values than that sintered from the flower-like *** average bending strength of the sample sintered from the plate-like precursor is 655 MPa,which is higher than that of the sample sintered from the flower-like precursor(524 MPa).Different reaction mechanisms and dispersing stabilities of the TiC particles at different temperature conditions should be accounted for the differences between the two samples.

关键词： Wet chemical method W-TiC alloy core-shell structures Spark plasma sintering Microstructure characterization

Confined nanospace pyrolysis: A versatile strategy to create hollow structured porous carbons

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Nano Research 2021年第9期14卷 3159-3173页

作者： Rui-Ping Zhang Wen-Cui Li Guang-Ping Hao An-Hui Lu State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyDalian 116024China

Confined nanospace pyrolysis(CNP)has attracted increasing attention as a general strategy to prepare task-specific hollow structured porous carbons(HSPCs)in the past *** unique advantages of the CNP strategy include its outstanding ability in control of the monodispersity,porosity and internal cavity of *** a consequence,the obtained HSPCs perform exceptionally well in applications where a high dispersibility and tailored cavity are particularly required,such as drug delivery,energy storage,catalysis and so *** this review,the fundamentals of the CNP strategy and its advances in structural alternation is first summarized,then typical applications are discussed by exemplifying specific synthesis *** addition,this review offers insights into future developments for advanced task-specific hollow structured porous materials prepared by the CNP strategy.

关键词： confined nanospace pyrolysis hollow structures carbon materials core-shell structures dispersibility

Preparation and oxidation characteristics of ZrC-ZrB2 composite powders with different proportions

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International Journal of Minerals,Metallurgy and Materials 2022年第3期29卷 521-528页

作者： Yu Wang Guohua Zhang Kuochih Chou State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

ZrC and ZrB2 are both typical ultra-high temperature ceramics,which can be used in the hyperthermal *** this study,a method for preparing ultrafine ZrC-ZrB2 composite powder was provided,by using the raw materials of nano ZrO2,carbon black,B4C,and metallic *** is worth pointing out that ZrC-ZrB2 composite powder with any proportion of ZrC to ZrB2 could be synthesized by this ***,a mixture of ZrC and C was prepared by carbothermal reduction of *** adjusting the addition amount of B4C,ZrC was boronized by B4C to generate ZrC-ZrB2 composite powder with different *** this method,five composite powders with different molar ratios of ZrC and ZrB2(100ZrC,75ZrC-25ZrB2,50ZrC-50ZrB2,25ZrC-75ZrB2,and 100ZrB2)were *** the temperature of boronization and decarburization process was 1473 K,the particle size of product was only tens of ***,the oxidation charac-teristics of different composite powders were investigated through oxidation *** oxidation resistance of ZrC-ZrB2 composite powder continued to increase as the content of ZrB2 increased.

关键词： borides carbides core-shell structures powders ultra-high temperature ceramic

Hot spots engineering by dielectric support for enhanced photocatalytic redox reactions

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Nano Research 2023年第1期16卷 239-247页

作者： Yan Yu Yujun Xie Pengfei Zhang Wei Zhang Wenxing Wang Shuyu Zhang Qiongrong Ou Wei Li Department of Chemistry State Key Laboratory of Molecular Engineering of PolymersShanghai Key Lab of Molecular Catalysis and Innovative MaterialsLaboratory of Advanced MaterialsFudan UniversityShanghai 200433China Institute for Electric Light Sources School of Information Science and TechnologyFudan UniversityShanghai 200433China Zhuhai Fudan Innovation Institute Guangdong-Macao In-Depth Cooperation Zone in HengqinZhuhai 519000China

Regulating the surface plasmon resonance(SPR)of metallic nanostructures is of great interests for optical and catalytic applications,however,it is still a great challenge for tuning SPR features of small metallic nanoparticles(<10 nm).In this work,we design a unique dielectric support-urchin-like mesoporous silica nanoparticles(U-SiO_(2))with ordered long spikes on its surface,which can well enhance the SPR properties of~3 nm gold nanocrystals(AuNCs).The U-SiO_(2)not only realizes the uniform self-assembly of AuNCs,but also prevents their aggregation due to the unique confinement *** finite-difference time-domain simulations show that the AuNCs on U-SiO_(2)can generate plasmonic hot spots with highly enhanced electromagnetic ***,the hot electrons can be effectively and rapidly transferred through the interface junction to TiO_(2).Thus,a high visible-light-driven photocatalytic activity can be observed,which is 3.8 times higher than that of smooth *** concept of dielectric supports engineering provides a new strategy for tuning SPR of small metallic nanocrystals towards the development of advanced plasmon-based applications.

关键词： surface plasmon resonance hot spots urchin-like silica nanoparticles photocatalysis core-shell structures TiO_(2)

Monodisperse core-shell structured magnetic mesoporous aluminosilicate nanospheres with large dendritic mesochannels

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Nano Research 2015年第8期8卷 2503-2514页

作者： Jianping Yang Dengke Shen Yong Wei Wei Li Fan Zhang Biao Kong Shaohua Zhang Wei Teng Jianwei Fan Weixian Zhang Shixue Dou Dongyuan Zhao College of Environmental Science and Engineering State Key Laboratory of Pollution Control and Resources Reuse Tongji University Shanghai 200092 China Department of Chemistry Shanghai Key Laboratory of Molecular Catalysis and Laboratory of Advanced Materials Fudan University Shanghai 200433 China Institute for Superconducting & Electronic Materials Australian Institute of Innovative Materials University of Wollongong Innovation Campus Squires Way North Wollongong NSW 2500 Australia Key Laboratory of Materials Physics Centre for Environmental and Energy Nanomaterials Anhui Key Laboratory of Nanomaterials and Nanotechnology Institute of Solid State Physics Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei 230031 China

The rational design and precise synthesis of multifunctional hybrid nanostructures with a tailored active core and a large, dendritic, modified mesoporous structured shell can promote catalysis, energy storage, and biological applications. Here, an oil-water biphase stratification coating strategy has been developed to prepare monodisperse magnetic dendritic mesoporous silica core-shell structured nano- spheres. These sophisticated Fe3O4@SiO2@dendritic-mSiO2 nanospheres feature large dendritic open pores （2.7 and 10.3 nm）. Significantly, the silica shells can be converted into dendritic mesoporous aluminosilicate frameworks with unchanged porosity, a Si/Al molar ratio of 14, and remarkably strong acidic sites, through a post-synthesis approach. In addition, the resultant magnetic dendritic mesoporous aluminosilicate nanospheres exhibit outstanding properties and promising application in phosphate removal from wastewater.

关键词： mesoporous materials core-shell structures aluminosilicates magnetic property surface acid

具有高效化学吸附、增强的载流子分离及抗光腐蚀能力的CdS/COF核壳结构纳米棒用于光催化还原铀

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Science China Materials 2023年第12期66卷 4680-4688页

作者：喻开富何攀何宁宁李小锋董昌雪蒋博邹莹迪裴响李阳马利建 College of Chemistry Key Laboratory of Radiation Physics&TechnologyMinistry of EducationSichuan UniversityChengdu 610064China College of Materials Science and Engineering Sichuan UniversityChengdu 610064China

基于半导体光催化剂将可溶的六价铀(U(Ⅵ))还原为不可溶的四价铀(U(Ⅳ))是一种简便、环保、高效的铀提取方法.实现该技术的关键是开发在无牺牲剂情况下对于光催化还原铀具有高活性和稳定性的催化剂.本文报道了一种新型CdS/COF核壳结构... 详细信息

基于半导体光催化剂将可溶的六价铀(U(Ⅵ))还原为不可溶的四价铀(U(Ⅳ))是一种简便、环保、高效的铀提取方法.实现该技术的关键是开发在无牺牲剂情况下对于光催化还原铀具有高活性和稳定性的催化剂.本文报道了一种新型CdS/COF核壳结构光催化剂(CdS@COF-10),该催化剂具有高效的化学吸附、增强的载流子分离和抗光腐蚀能力,无需额外的牺牲剂即可用于高效的光催化还原铀.COF壳层不仅为U(Ⅵ)提供了化学吸附位点,降低了U(Ⅵ)还原的活化能,而且在与CdS核的界面处形成了内建电场,促进了载流子的分离.更重要的是,具有适当COF壳含量的CdS-COF-10在结晶度、界面接触完整性、CdS核的光吸收和U(Ⅵ)化学吸附位点数量之间取得了平衡,获得了最高的载流子分离效率和光催化还原铀性能.

关键词： covalent organic frameworks core-shell structures U(VI)photoreduction carrier separation antiphotocorrosion

Hot hole multiplication from silver plasmon-resonated gold interband transitions for enhanced photoelectrochemical sensing

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Chinese Chemical Letters 2023年第12期34卷 522-526页

作者： Pei Zhang Bo Shen Xu Li Zhou Nie Kun Li State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan Provincial Key Laboratory of Biomacromolecular Chemical BiologyCollege of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China

Compared with the widespread exploitation of hot electrons in plasmonic nanoparticles(NPs),hot holes generated from plasmonic metal interband transitions,are often overlooked in photoelectrochemistry,including photoelectrochemical *** by the subtle spectral overlap between the characteristic plasmonic bands of Ag NPs and interband transitions of Au,herein,we construct unusual core-shell Ag@Au NPs via an anti-galvanic reaction to promote the generation of hot *** from the unique plasmon resonances of Ag cores in specific wavelength regimes,Ag@Au can excite multiplied hot holes while Au cannot under the same *** satisfactory accuracy and good practicability,the photoelectrochemical sensing platform based on Ag@Au NPs possesses a detection limit of 77 nmol/L for glucose,exhibiting significantly higher sensitivity compared to that using Au *** work exemplifies the applications of interband hot-hole accumulation initiated by plasmons and may inspire more strategies to explore the utilization of hot holes in photoelectrochemistry.

关键词： Nanoplasmonics core-shell structures Interband transition Hot hole Photoelectrochemical Biosensors