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Construction of hollow mesoporous silica nanoreactors for enhanced photo-oxidations over Au-Pt catalysts

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National Science Review 2020年第11期7卷 1647-1655页

作者： Hao Tian Jinhui Zhao Xinyao Wang Lizhuo Wang Hao Liu Guoxiu Wang Jun Huang Jian Liu G.Q.(Max) Lu State Key Laboratory of Catalysis Dalian Institute of Chemical Physics (DICP)Chinese Academy of Sciences Centre for Clean Energy Technology School of Mathematical and Physical SciencesFaculty of ScienceUniversity of Technology Sydney Laboratory for Catalysis Engineering School of Chemical and Biomolecular Engineering Sydney Nano Institute The University of Sydney DICP-Surrey Joint Centre for Future Materials Department of Chemical and Process Engineering and Advanced Technology Institute University of Surrey University of Surrey

It is highly desirable to design hollow structures with multi-scale functions by mimicking cells for the construction of micro/nanoreactors. Herein, we report the construction of hollow-structured submicrometer-photoreactors with bimetallic catalysts loaded within mesoporous silicas. The synthesis parameters are optimized to study the evolution of hollow structure through hydrothermal treatment and an ‘adhesive-contraction’ formation mechanism is proposed. Au Pt@HMZS catalysts exhibited a broader absorbance region under visible light and the adsorption edge displayed a red-shift, indicating the strong metal–metal interactions at the alloy interface. The reaction performance of the coupled Au-Pt catalysts can be tuned to achieve excellent catalytic activity in cinnamyl alcohol oxidation to cinnamic acid for 3.1 mmol g-1with 99%selectivity. The proposed strategy to build hollow structures as multifunctional micro/nanoreactors is promising for the design of high-performance and sustainable catalysts for chemical synthesis.

关键词： nanoreactors photocatalytic oxidation metal nanoparticles mesoporous materials surface plasmonic resonance

Nanoengineering of amino-functionalized mesoporous silica nanospheres as nanoreactors

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Progress in Natural Science:Materials International 2018年第2期28卷 242-245页

作者： Jinsuo Gao Shouchun Wu Feng Tan Hao Tian Jian Liu G.Q.Max Lu Key Laboratory of Industrial Ecology and Environmental Engineering (MOE) School of Environmental Science and Technology Dalian University of Technology State Key Laboratory of Catalysis iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences Department of Chemical and Process Engineering and Advanced Technology Institute University of Surrey Vice-Chancellor's Office University of Surrey

Selective functionalization of mesoporous silica nanospheres（MSNs） is crucial for nanoengineering of ***, we have combined "surface-protected etching strategy" and "cationic surfactant assisted etching strategy" to prepare functionalized MSNs with externally attached amino groups. The externally attached NH;groups endow the catalysts with excellent catalytic performance for nitroaldol reaction between nitromethane and benzaldehyde. In addition, those NH;-MSNs can also be used to support gold nanoparticles, which display very good catalytic performance for reduction of 4-nitrophenol. It can be envisioned that the synthesis protocol developed in this work could also be extended to nanoengineered MSNs, which provides opportunities for nanoreactors design.

关键词： Mesoporous silica nanospheres Nanoengineering nanoreactors Catalysis

CoP@SiO2nanoreactors: A core-shell structure for efficient electrocatalytic oxygen evolution reaction

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Chinese Chemical Letters 2020年第9期31卷 2300-2304页

作者： Ling Jin Huan Pang School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225009China

Metallic phosphides as a crucial class of metal-like compounds show high electric conductivity and electrochemical *** is of significant benefit to understanding the relationship between the electrocatalytic performance and phosphating degree of *** this work,using Co3O4@SiO2 as precursor,core-shell structured CoP@SiO2 nanoreactors with outstanding oxygen evolution reaction performance were synthesized through a facile calcination *** electrocatalytic performance of CoP@SiO2 modified electrode that treated with 500 mg NaH2PO2 was greatly *** obtained product displays a low overpotential of 280 mV at a current density of 10 mA/cm2 and a Tafel value 89 mV/dec in alkaline *** easy available CoP@SiO2 with outstanding catalytic performance and stability possesses huge potential in future electrochemical applications.

关键词： Core-shell structure Phosphating nanoreactors Oxygen evolution reaction Silicon shell

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Synthesis,Efficiency,and Recyclable Scandium-Complexed Dendritic nanoreactors on Silica as Lewis Acid Catalyst in Friedel-Crafts Acylation Reactions

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Synthesis,Efficiency,and Recyclable Scandium-Complexed Dendr...

Scalable synthesis of sub-lO0 nm hollow carbon nanospheres for energy storage applications

中国化学会全国第十一届有机合成化学学术研讨会

作者： Weiping Shen Zhicheng Bao Jing Yu Hua Zhou Fei Wang Department of Chemistry Shanghai University

Scandium-complexed dendritic nanoreactors（SCDNS） on silica,featured with mushroom-like dendrites and deep-falling cavities,were evaluated as catalysts for Friedel-Crafts acylation *** results showed the nanoenvironment of SCDNS played a dominant role in improving the activity of *** fluorobenzene could be acylated smoothly,which hardly occurs in most ***,the catalysts can be easily recovered by simple filtration and reused for several times without significant loss of activity.

关键词： Scandium Complex Dendrimer nanoreactors Friedel-Crafts Acylation Nanoenvironment.

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Nano Research 2018年第4期11卷 1822-1833页

作者： Hongyu Zhao Fan Zhang Shumeng Zhang Shengnan He Fei Shen Xiaogang Han Yadong Yin Chuanbo Gao Center for Materials Chemistry Frontier Institute of Science and Technology Xi'an Jiaotong University Xi'an 710054 China Center of Nanomaterials for Renewable Energy Key Lab of Smart Grid of Shaanxi Province State Key Laboratory of Electrical Insulation and Power Equipment Xi'an Jiaotong University Xi'an 710054 China Department of Chemistry University of California Riverside CA 92521 USA

Sub-100 nm hollow carbon nanospheres with thin shells are highly desirable anode materials for energy storage applications. However, their synthesis remains a great challenge with conventional strategies. In this work, we demonstrate that hollow carbon nanospheres of unprecedentedly small sizes （down to - 32.5 nm and with thickness of - 3.9 nm） can be produced on a large scale by a templating process in a unique reverse micelle system. Reverse micelles enable a spatially confined Stober process that produces uniform silica nanospheres with significantly reduced sizes compared with those from a conventional Stober process, and a subsequent well-controlled sol-gel coating process with a resorcinol-formaldehyde resin on these silica nanospheres as a precursor of the hollow carbon nanospheres. Owing to the short diffusion length resulting from their hollow structure, as well as their small size and microporosity, these hollow carbon nanospheres show excellent capacity and cycling stability when used as anode materials for lithium/sodium-ion batteries.

关键词： hollow carbon nanospheres reverse micelles nanoreactors templating synthesis energy storage

Construction of a Cu@hollow TS-1 nanoreactor based on a hierarchical full-spectrum solar light utilization strategy for photothermal synergistic artificial photosynthesis

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Carbon Energy 2024年第2期6卷 25-36页

作者： Sixian Zhu Qiao Zhao Hongxia Guo Li Liu Xiao Wang Xiwei Qi Xianguang Meng Wenquan Cui Hebei Key Laboratory for Environment Photocatalytic and Electrocatalytic Materials College of Chemical EngineeringNorth China University of Science and TechnologyTangshanChina School of Materials Science and Engineering National Institute for Advanced MaterialsTKL of Metal and Molecule-Based Material ChemistryNankai UniversityTianjinChina Hebei Iron and Steel Laboratory TangshanChina

The artificial photosynthesis technology has been recognized as a promising solution for CO_(2) *** catalysis has been proposed as a novel strategy to promote the efficiency of artificial photosynthesis by coupling both photochemistry and ***,strategies for maximizing the use of solar spectra with different frequencies in photothermal catalysis are urgently ***,a hierarchical full-spectrum solar light utilization strategy is *** on this strategy,a Cu@hollow titanium silicalite-1 zeolite(TS-1)nanoreactor with spatially separated photo/thermal catalytic sites is designed to realize high-efficiency photothermal catalytic artificial *** space-time yield of alcohol products over the optimal catalyst reached 64.4μmol g−1 h−1,with the selectivity of CH3CH2OH of 69.5%.This rationally designed hierarchical utilization strategy for solar light can be summarized as follows:(1)high-energy ultraviolet light is utilized to drive the initial and difficult CO_(2) activation step on the TS-1 shell;(2)visible light can induce the localized surface plasmon resonance effect on plasmonic Cu to generate hot electrons for H2O dissociation and subsequent reaction steps;and(3)low-energy near-infrared light is converted into heat by the simulated greenhouse effect by cavities to accelerate the carrier *** work provides some scientific and experimental bases for research on novel,highly efficient photothermal catalysts for artificial photosynthesis.

关键词： artificial photosynthesis full spectrum nanoreactors photothermal catalysis

Electrospun advanced nanomaterials for in situ transmission electron microscopy:Progress and perspectives

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InfoMat 2023年第12期5卷 1-27页

作者： Jingyue Zhao Zulin Li Shiwen Lv Manxi Wang Chuanping Li Xuan Li Hongyang Chen Manxian Li Xiaochuan Chen Feifeng Wang Weiwei Fan Junxiong Wu Ziqiang Wang Xiaoyan Li Yuming Chen Engineering Research Center of Polymer Green Recycling of Ministry of Education Fujian Key Laboratory of Pollution Control&Resource ReuseCollege of Environmental and Resource Sciences and College of Carbon Neutral Modern IndustryFujian Normal UniversityFuzhouFujianthe People's Republic of China Department of Materials Science and Engineering and Department of Nuclear Science and Engineering Massachusetts Institute of TechnologyCambridgeMassachusettsUSA Institute of Materials Research Shenzhen International Graduate SchoolTsinghua UniversityShenzhenthe People's Republic of China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouFujianthe People's Republic of China

Electrospun nanofibers(NFs)have shown excellent properties including high porosity,abundant active sites,controllable diameter,uniform and designable structure,high mechanical strength,and superior resistance to external destruction,which are ideal nanoreactors for in situ *** various techniques,in situ transmission electron microscopy(TEM)has enabled operando observation at the atomic level due to its high temporal and spatial resolution combined with excellent sensitivity,which is of great importance for rational materials design and performance *** this review,the basic knowledge of in situ TEM techniques and the advantages of electrospun nanoreactors for in situ TEM characterization are first *** recent development in electrospun nanoreactors for studying the physical properties,structural evolution,phase transition,and formation mechanisms of materials using in situ TEM is then *** electrochemical behaviors of carbon nanofibers(CNFs),metal/metal oxide NFs,and solidelectrolyte interphase for different rechargeable batteries are ***,challenges faced by electrospun nanoreactors for in situ TEM characterization are discussed and potential solutions are proposed to advance this field.

关键词： batteries electrospun advanced nanofibers in situ transmission electron microscopy nanoreactors

Functional Polymersomes via Kinetic Control

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Functional Polymersomes via Kinetic Control