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Biotemplated synthesis of three-dimensional porous MnO/C-N nanocomposites from renewable rapeseed pollen： An anode material for lithium-ion batteries

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Nano Research 2017年第1期10卷 1-11页

作者： Li-Feng Chen Sheng-Xiang Ma Shu Lu Yue Feng Jia Zhang Sen Xin Shu-Hong Yu division ofNanomatefials & chemistry Hefei National Laboratory for Physical Sciences at Microscale Collaborative Innovation Center of Suzhou Nano Science and Technology CAS Center for Excellence in Nanoscience Department of Chemistry Department of Materials Science & Engineering University of Science and Technology of China Hefei 230026 China Anhui Key Laboratory of Controllable chemical Reaction and Material chemical engineering School of Chemical Engineering Hefei University of Technology Hefei 230009 China

Lithium-ion batteries （LIBs） are currently recognized as one of the most popular power sources available. To construct advanced LIBs exhibiting long-term endurance, great attention has been paid to enhancing their poor cycle stabilities. As the performance of LIBs is dependent on the electrode materials employed, the most promising approach to improve their life span is the design of novel electrode materials. We herein describe the rational design of a three-dimensional （3D） porous MnO/C-N nanoarchitecture as an anode material for long cycle life LIBs based on their preparation from inexpensive, renewable, and abundant rapeseed pollen （R-pollen） via a facile immersion-annealing route. Remarkably, the as-prepared MnO/C-N with its optimized 3D nanostructure exhibited a high specific capacity （756.5 mAh·g^-1 at a rate of 100 mA·g^-1）, long life span （specific discharge capacity of 513.0 mAh·g^-1, -95.16% of the initial reversible capacity, after 400 cycles at 300 mA·g^-1）, and good rate capability. This material therefore represents a promising alternative candidate for the high-performance anode of next-generation LIBs.

关键词： 3D porous MnO/C-Nnanocomposite rapeseed pollen renewable biomass lithium-ion batter long cycle life

Strong and stiff Ag nanowire-chitosan composite films reinforced by Ag-S covalent bonds

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Nano Research 2018年第1期11卷 410-419页

作者： Xiao-Feng Pan Huai-Ling Gao Yang Su Ya-Dong Wu Xiang-Ying Wang Jing-Zhe Xue Tao He Yang Lu Jian-Wei Liu Shu-Hong Yu School of chemistry and chemical engineering Hefei University of Technology Hefei230009 China division of Nanomatefials and chemistry Hefei National Laboratory for Physical Sciences at Microscale Collaborative Innovation Center of Suzhou Nano Science and Technology CAS Center for Excellence in Nanoscience Department of Chemistry University of Science and Technology of China Hefei 230026 China

High-performance composites containing various kinds of nanofibers as reinforcing building blocks have recently received considerable attention, owing to their superior mechanical properties. One of the effective strategies to reinforce these composites involves strengthening interfacial interactions via covalent bonds. However, in contrast to nanosheets, covalent bonds have been rarely used in nanofiber-reinforced composites. Herein, we report the macroscale fabrication of a series of Ag nanowire （NW）-thiolated chitosan （TCS） composite films via spray induced self-assembly. The obtained films were significantly strengthened by Ag-S covalent bonds formed between the Ag NWs and the thiol groups of TCS. The tensile strength of the optimized Ag NW-TCS film was up to 3.9 and 1.5 times higher compared with that of pure TCS and Ag NW-chitosan （CS） films, respectively.

关键词： silver nanowire thiolated chitosan Ag-S covalent bond spraying reinforcement

Calcium carbonate-doxorubicin @silica-indocyanine green nanospheres with photo-triggered drug delivery enhance cell killing in drug-resistant breast cancer cells

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Nano Research 2018年第6期11卷 3385-3395页

作者： Wei Wang Yang Zhao Bei-Bei Yan Liang Dong Yang Lu Shu-Hong Yu division of Nanomaterials & chemistry Hefei National Research Center for Physical Sciences at the Microscale Collaborative Innovation Center of Suzhou Nano Science and Technology Department of Chemistry CAS Centre for Excellence in Nanoscience Hefei Science Centre of CAS University of Science and Technology of China Hefei 230026 China School of chemistry and chemical engineering Hefei University of Technology Hefei 230009 China

Calcium carbonate-doxorubicin@silica-indocyanine green nanospheres with high uniformity and monodispersity were designed and synthesized, in order to provide a photo-triggered strategy for drug-resistant cancer therapy. Under near-infrared laser irradiation, the nanospheres transformed laser power into local heat and reactive oxygen species via the connected indocyanine green molecule, thus exhibiting photothermal and photodynamic effects. Moreover, the photo-triggered drug release based on calcium-assisted silica degradation was observed, endowing the nanospheres with chemotherapeutic properties. Finally, combined therapeutic effects against drug-resistant human breast cancer cells were successfully obtained. These photo-triggered materials based on calcium carbonate could provide a promising platform for enhanced multimodal cancer therapies.

关键词： calcium carbonate-based structures photothermal therapy photodynamic therapy combined therapeutic effects

Photocatalytic CO2 reduction highly enhanced by oxygen vacancies on Pt-nanoparticle-dispersed gallium oxide

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Nano Research 2016年第6期9卷 1689-1700页

作者： Yun-Xiang Pan Zheng-Qing Sun Huai-Ping Cong Yu-Long Men Sen Xin Jie Song Shu-Hong Yu School of chemistry and chemical engineering Hefei University of Technology Hefei 230009 China division ofNanomaterials & chemistry Hefei National Laboratory for Physical Sciences at the Microscale Department of Chemistry CAS Center for Excellence in Nanoscience University of Science and Technology of China Hefei 230026 China Institute of Nano Biomedicine and engineering Department of Instrument Science and Engineering School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Shanghai 200240 China

Photocatalytic CO2 reduction on metal-oxide-based catalysts is promising for solving the energy and environmental crises faced by mankind. The oxygen vacancy （Vo） on metal oxides is expected to be a key factor affecting the efficiency of photocatalytic CO2 reduction on metal-oxide-based catalysts. Yet, to date, the question of how an Vo influences photocatalytic CO2 reduction is still unanswered. Herein, we report that, on Vo-rich gallium oxide coated with Pt nanoparticles （Vo-rich Pt/Ga203）, CO2 is photocatalytically reduced to CO, with a highly enhanced CO evolution rate （21.0umol.h-1） compared to those on Vo-poor Pt/Ga2O3 （3.9 gmol-h-1） and Pt/TiO2（P25）（6.7 gmol.h-1）. We demonstrate that the Vo leads to improved CO2 adsorption and separation of the photoinduced charges on Pt/Ga203, thus enhancing the photocatalytic activity of Pt/Ga203. Rational fabrication of an Vo is thereby an attractive strategy for developing efficient catalysts for photocatalytic CO2 reduction.

关键词： photocatalytic CO2reduction oxygen vacancy metal-oxide-based catalyst C02 adsorption

Sulfur-doped graphene anchoring of ultrafine Au25 nanoclusters for electrocatalysis

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Nano Research 2021年第10期14卷 3509-3513页

作者： Mufan Li Bei Zhang Tao Cheng Sunmoon Yu Sheena Louisia Chubai Chen Shouping Chen Stefano Cestellos-Blanco William AGoddard III Peidong Yang Department of chemistry University of CaliforniaBerkeleyCalifornia 94720USA Department of Materials Science and engineering University of CaliforniaBerkeleyCalifornia 94720USA chemical Science division Lawrence Berkeley National LaboratoryBerkeleyCalifornia 94720USA kavli Energy nanoscience Institute BerkeleyCalifornia 94720USA Materials and Process Simulation center California Institute of TechnologyPasadenaCalifornia 91125USA

The biggest challenge of exploring the catalytic properties of under-coordinated nanoclusters is the issue of *** demonstrate herein that chemical dopants on sulfur-doped graphene(S-G)can be utilized to stabilize ultrafine(sub-2 nm)Au_(25)(PET)18 clusters to enable stable nitrogen reduction reaction(NRR)without significant structural *** Au_(25)@S-G exhibits an ammonia yield rate of 27.5μgNH_(3)·mgAu^(-1)·h^(-1)at-0.5 V with faradic efficiency of 2.3%.More importantly,the anchored clusters preserve~80%NRR activity after four days of continuous operation,a significant improvement over the 15%remaining ammonia production rate for clusters loaded on undoped graphene tested under the same *** labeling experiments confirmed the ammonia was a direct reaction product of N2 feeding gas instead of other chemical ***-situ X-ray photoelectron spectroscopy and X-ray absorption near-edge spectroscopy of post-reaction catalysts reveal that the sulfur dopant plays a critical role in stabilizing the chemical state and coordination environment of Au atoms in *** ReaxFF molecular dynamics(RMD)simulation confirmed the strong interaction between Au nanoclusters(NCs)and *** substrate-anchoring process could serve as an effective strategy to study ultrafine nanoclusters’electrocatalytic behavior while minimizing the destruction of the under-coordinated surface motif under harsh electrochemical reaction conditions.

关键词： gold nanoclusters sulfur-doped graphene nitrogen reduction reaction electrocatalysis anchoring effect

Nested hollow architectures of nitrogen-doped carbon-decorated Fe,Co,Ni-based phosphides for boosting water and urea electrolysis

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Nano Research 2022年第3期15卷 1916-1925页

作者： Jie Zhang Shoushuang Huang Ping Ning Peijun Xin Zhiwen Chen Qing Wang Kajsa Uvdal Zhangjun Hu Shanghai Applied Radiation Institute School of Environmental and Chemical EngineeringShanghai UniversityShanghai 200444China division of Molecular Surface Physics&nanoscience Department of PhysicsChemistry and BiologyLinköping UniversityLinköping 58183Sweden

Tailoring the nanostructure/morphology and chemical composition is important to regulate the electronic configuration of electrocatalysts and thus enhance their performance for water and urea ***,the nitrogen-doped carbon-decorated tricomponent metal phosphides of FeP4 nanotube@Ni-Co-P nanocage(NC-FNCP)with unique nested hollow architectures are fabricated by a self-sacrifice template *** from the multi-component synergy,the modification of nitrogen-doped carbon,and the modulation of nested porous hollow morphology,NC-FNCP facilitates rapid electron/mass transport in water and urea ***-FNCP-based anode shows low potentials of 248 mV and 1.37 V(*** hydrogen electrode)to attain 10 mA/cm^(2) for oxygen evolution reaction(OER)and urea oxidation reaction(UOR),*** addition,the overall urea electrolysis drives 10 mA/cm^(2) at a comparatively low voltage of 1.52 V(***)that is 110 mV lower than that of overall water electrolysis,as well as exhibits excellent stability over 20 *** work strategizes a multi-shell-structured electrocatalyst with multi-compositions and explores its applications in a sustainable combination of hydrogen production and sewage remediation.

关键词： tri-metal phosphides nested hollow nano-architecture oxygen evolution reaction urea oxidation reaction

Elucidating the impact of the ionomer equivalent weight on a platinum group metal-free PEMFC cathode via oxygen limiting current

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SusMat 2023年第1期3卷 72-90页

作者： HaoWang Luigi Osmieri Haoran Yu Michael J.Zachman Jae Hyung Park Nancy N.Kariuki Firat C.Cetinbas Sunilkumar Khandavalli Scott Mauger Deborah J.Myers David A.Cullen Kenneth C.Neyerlin chemistry and nanoscience center National Renewable Energy LaboratoryGoldenColoradoUSA center for Nanophase Materials Sciences Oak Ridge National LaboratoryOak RidgeTennesseeUSA chemical Sciences and engineering division Argonne National LaboratoryLemontIllinoisUSA Nuclear Science and engineering division Argonne National LaboratoryLemontIllinoisUSA

Leveraging the interactions between ionomer and catalyst can increase the performance of proton exchangemembrane fuel *** impacts of the equivalent weight(EW)of perfluorosulfonic acid-based ionomers on the platinum group metal-free electrode structure and fuel cell performance have not been fully *** membrane electrode assemblies(MEAs)were prepared by using a commercial Fe-N-C catalyst,two perfluorosulfonic acid ionomers with different EWs,that is,Aquivion 720(A720)and Nafion 1100(N1100),and two ionomer-tocatalyst(I/C)*** four MEAswere characterized to understand the impact of the ionomer EW and content on the capacitance,proton conductivity,and mass transport on the *** mass transport resistance was measured for the first time using a new oxygen reduction reaction limiting current method enabling to couple the effects of oxygen diffusion with liquid water *** EW ionomer combined with a moderate I/C results in improved performance due to its enhanced proton ***,when used at high I/C,it can cause severewater flooding at high current density due to the enhanced liquid water uptake,especially at high relative humidity,resulting in lower catalyst utilization and higher mass transport resistance.

关键词： ionomer equivalent weight limiting current mass transport oxygen reduction reaction PGMfree catalyst proton exchange membrane fuel cell

In situ assembly of magnetic nanocrystals/graphene oxide nanosheets on tumor cells enables efficient cancer therapy

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Nano Research 2020年第4期13卷 1133-1140页

作者： Mingyang Liu Yang Lu Qilin Yu Shu-Hong Yu Key Laboratory of Molecular Microbiology and Technology Ministry of EducationDepartment of MicrobiologyCollege of Life SciencesNankai UniversityTianjin 300071China division of Nanomaterials and chemistry Hefei National Laboratory for Physical Sciences at the MicroscaleCAS Center for Excellence in NanoscienceDepartment of ChemistryUniversity of Science and Technology of ChinaHefei 230026China Key Laboratory of Advanced Catalytic Materials and Reaction engineering School of Chemistry and Chemical EngineeringHefei University of TechnologyHefei 230009China

Owing to the stimulus-responsive and dynamic properties,magnetism-driven assembly of building blocks to form ordered structures is always a marvelous *** abundant magnetic assemblies have been developed in ideal physical and chemical conditions,it remains a challenge to realize magnetic assembly in complicated biological ***,we report a kind of biomacromolecule-modified magnetic nanosheets,which are mainly composed of superparamagnetic graphene oxide(Y-Fe2O3@GO),the tumor-targeting protein transferrin(TF),and the mitochondrion-targeting peptide(MitP).Such large-size nanosheets(0.5-1μm),noted as L-Fe2O3@GO-MitP-TF,can successfully in s itu assemble on the surface of tumor cells in a size-dependent and tumor cell-specific way,leading to severe inhibition of nutrient uptake for the tumor *** significantly,the nanostructures could efficiently confine the tumor cells,preventing both invasion and metastasis of tumor cells both in vitro and in ***,the 2D assemblies could remarkably disrupt the mitochondria and induce apoptosis,remarkably eradicating tumors under near-infrared(NIR)*** study sheds light on the development of new nano-systems for efficient cancer therapy and other biomedical applications.

关键词： magnetic assembly graphene oxide transferrin mitochondrion-targeting peptide metastasis cancer therapy

Lead halide perovskite nanowires stabilized by block copolymers for Langmuir-Blodgett assembly

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Nano Research 2020年第5期13卷 1453-1458页

作者： Hao Liu Martin Siron Mengyu Gao Dylan Lu Yehonadav Bekenstein Dandan Zhang Letian Dou A.Paul Alivisatos Peidong Yang Department of chemistry University of CaliforniaBerkeleyCalifornia 94720USA Department of Materials Science and engineering University of CaliforniaBerkeleyCalifornia 94720USA Materials Science division Lawrence Berkeley National LaboratoryBerkeleyCalifornia 94720USA kavli Energy nanoscience Institute BerkeleyCalifornia 94720USA center for Advanced Low-dimension Materials Donghua UniversityShanghai 201620China Department of Materials Science and engineering Technion-Israel institute of technologyHaifa 3200003Israe Davidson School of chemical engineering Purdue UniversityWest LafayetteIndiana 47907USA

The rapid development of solar cells based on lead halide perovskites(LHPs)has prompted very active research activities in other closely-related *** nanostructures of such materials display superior optoelectronic ***,onedimensional(1D)LHPs nanowires show anisotropic optical properties when they are highly ***,the ionic nature makes them very sensitive to external environment,limiting their large scale practical ***,we introduce an amphiphilic block copolymer,polystyrene-block-poly(4-vinylpyridine)(PS-P4VP),to chemically modify the surface of colloidal CsPbBr3 *** resulting core-shell nanowires show enhanced photoluminescent emission and good colloidal stability against *** advantage of the stability enhancement,we further applied a modified Langmuir-Blodgett technique to assemble monolayers of highly aligned nanowires,and studied their anisotropic optical properties.

关键词： nanowires anisotropic optical properties aligned monolayer lead halide perovskites stability enhancement