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Science China Chemistry 2019年第3期62卷 385-392页

作者： Pingwei Cai Xinxin Peng Junheng Huang Jingchun Jia Xiang Hu Zhenhai Wen CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences University of Chinese Academy of Science

We report a relatively low-temperature molten salt strategy to prepare hollow structured N-doped noble carbon(h-NNC) with highly desirable features of ultra-large surface area(1957 m^2 g^(-1)) and high graphitization, endowing the h-NNC with high activity toward catalysis of oxygen reduction reaction in acidic medium. The h-NNC is applied as cathode catalyst of an asymmetrical-electrolyte Zn-air battery, which exhibits an open circuit voltage of 2.11 V, a power density up to 270 mW cm^(-2),and an energy density of 1279 W h kg^(-1), behaving advantages over the conventional Zn-air batteries.

关键词： noble carbon oxygen reduction reaction asymmetric-electrolyte Zn-air battery energy density

Synthesis and Characterization of Two Polyoxometalate-Based Silver(I) Compounds with Potential Application for Antimicrobial Epoxy Resin Coating

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SSRN 2023年

作者： Fu, Chunhua He, Qianfeng Bu, Yousen Li, Yuhang Bao, Hanxin Dai, Lu Zhang, Changrui Wang, Peiyuan Hu, Ting Lu, Can-Zhong Xiamen Institute of Rare Earth Materials Haixi Institute Chinese Academy of Science Xiamen361021 China CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research The Structure of Matter Chinese Academy of Sciences Fujian Province Fuzhou China China College of Materials Science and Engineering Huaqiao University Fujian Xiamen361021 China

Both silver and polyoxometalates (POMs) exhibit special affinity for biomolecules, which has led to their wide acceptance in the medical field. Herein, in order to explore their typical antibacterial properties, two new polyoxometalate-based silver compounds(Ag-POMs), namely, [(Ag3PW12O40)(DMSO)8(H2O)] (1), [(Ag3PMo12O40)(DMSO)8(H2O)] (2)have been synthesized and structurally characterized by X-ray crystallography. Compounds 1 and 2 crystallize in the centrosymmetric monoclinic space group C2/c and isostructural, which exhibit three dimensional supramolecular structure with the infinite coordination chains based on the coordinated Ag3 aggregates and POM anions. According to a class of in vitro experiment results, 1 and 2 exhibit some inhibitory effect against bacteria strains. By UV-visible spectrometer, the absorbance decreased from 0.83 to 0.49 after adding material 1 (100 µg/ml) to E. coli for 12 h. After adding 2 to the bacterial solution for 4 h, the absorbance at a wavelength of 600 nm decreased by about 60%. This is mainly ascribed to the absorbing capabilities of the Ag-POMs toward the rigid cell wall of both E. coli and S. aureus totally suppression of bacterial proliferation. Meanwhile, by mixing the prepared Ag-POMs crystalline materials with the epoxy resin, the antibacterial effect of the epoxy coating was also investigated. The average diameter of bacteriostatic rings of 1 is 16.24 mm, while that of 2 is 13.66 mm. That the dispersibility and compatibility of Ag-POMs in epoxy resin makes them as effective antibacterial agent for coating. The experimental results might shed light on the fabrication of new kinds of antimicrobial surface coating materials. © 2023, The Authors. All rights reserved.

关键词： Epoxy resins

Multiplexed intracellular detection based on dual-excitation/dualemission upconversion nanoprobes

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Nano Research 2020年第7期13卷 1955-1961页

作者： Jianxi Ke Shan Lu Zhuo Li Xiaoying Shang Xingjun Li Renfu Li Datao Tu Zhuo Chen Xueyuan Chen CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China University of Chinese Academy of Sciences Beijing 100049China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China

Multiplexed intracellular detection is desirable in biomedical sciences for its higher eficiency and accuracy compared to the single-analyte ***,it is very challenging to construct nanoprobes that possess multiple fluorescent signals to recognize the different intracellular species ***,we proposed a novel dual-excitation/dual-emission upconversion strategy for multiplexed detection through the design of upconversion nanoparticles(UCNP)loaded with two dyes for sensitization and quenching of the upconversion luminescence(UCL),*** on the two independent energy transfer processes of near-infrared(NIR)dye IR845 to UCNP and UCNP to visible dye PAPS-Zn,CIO-and Zn2+were simultaneously detected with a limit of detection(LOD)of41.4 and 10.5 nM,*** tilizing a purpose built 830/980 nm dual-laser confocal microscope,both intrinsic and exogenous CIO and Zn2+in live MCF-7 cells have been accurately *** dual-excitation/dual-emission ratiometric UCL detection mode enables not only monitoring multiple intracellular analytes but also eliminating the detection deviation caused by inhomogeneous probe distribution in *** modulation of NIR dye and visible dye with other reactive groups,the nanoprobes can be extended to analyze various intraellular species,which provides a promising tool to study the biological activities in live cells and diagnose diseases.

关键词： upconversion nanoparticles energy transfer dual-excitation dye sensitization ratiometric probe multiplexed detection

Synthesis of One-Dimensional Phosphonate Metal−Organic Framework with Perylenediimide for Eﬃcient Photocatalytic Water Oxidation

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SSRN 2025年

作者： Li, Kang Wang, Zhuoyue Li, Renfu Xu, Xiao Wang, Shoufeng Luo, Huimin Yan, Jinming Guo, Jia Kang, Longtian State Key Laboratory of Structural Chemistry Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fujian Fuzhou350002 China Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China Fujian Fuzhou350108 China University of Chinese Academy of Sciences Chinese Academy of Sciences Beijing100049 China CAS Key Laboratory of Design and Assembly of Functional Nanostructurese China

Compared with carboxylic-based metal–organic frameworks (MOFs), the phosphate MOFs with higher stability have attracted increasing interests, however, their photocatalytic activity has been largely underdeveloped. Herein, one-dimensional phosphate MOFs nanowires (P-PDI-Co) are firstly synthesized with phosphoric perylenediimide (P-PDI) and cobaltous nitrate (Co(NO3)2) for photocatalytic oxygen evolution (POE). The temperature effect on the structure and components of as-prepared P-PDI-Co nanomaterials are carefully investigated, suggesting that the insertion of Co(NO3)2 into P-PDI nanowires at the room temperature and the formation of 1D P-PDI-Co-120 MOF at >120 ℃. The systematical characterizations prove that all of P-PDI-Co samples, especially P-PDI-Co-120 with better thermal stability than carboxylic acid PDI-Co MOF, have more excellent optical, photoelectric and electric properties, and the POE activity than P-PDI nanowires. Under visible light irradiation (λ> 420), the POE rate of 14.0 mmol g⁻¹ h⁻¹ can be achieved without photosensitizer at acidic condition (pH = 3.0), which is the highest value so far with phosphate MOFs as photocatalyst. The further experiments reveal that the faster separation lifetime (4.6 vs. 23.9 ps) and longer recombination lifetime (48.1 vs. 5.5 ps) of photoinduced electrons and holes in P-PDI-Co than P-PDI. This work provides a new idea to synthesize phosphate MOF for photocatalytic study. © 2025, The Authors. All rights reserved.

关键词： Nanowires

Reversible potassium storage in ultrafine CF_(x): A superior cathode material for potassium batteries and its mechanism

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Journal of Energy Chemistry 2021年第2期30卷 347-353,I0012页

作者： Hongjun Yue Huixin Chen Chen Zhao Zhiming Zheng Ke Zhou Qjaobao Zhang Guiming Zhong Can-Zhong Lu Yong Yang CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002FujianChina Xiamen Institute of Rare Earth Materials Haixi Institutes.Chinese Academy of SciencesXiamen 361021Fujian.China College of Chemistry Fuzhou University.Fuzhou 350108FujianChina Department of Materials Science and Engineering College of MaterialsXiamen UniversityXiamen 361005FujianChina State Key Lab of Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materials and Department of ChemistryXiamen UniversityXiamen 361005FujianChina

Current studies of cathodes for potassium batteries(PBs) mainly focus on the intercalation-type *** conversion-type materials that possess much higher theoretical capacities are rarely discussed in previous *** this work,carbon fluoride(CF_x) is reported as a high capacity conversion-type cathode for PBs for the first *** material delivers a remarkable discharge capacity of>250 mAh g^(-1) with mid-voltage of 2.6 V at 20 mA g^(-1).Moreover,a highly reversible capacity of around 95 mAh g^(-1) is achieved at 125 mA g^(-1) and maintained for 900 cycles,demonstrating its excellent cycling *** mechanism of this highly reversible conversion reaction is further investigated by nuclear magnetic resonance spectra,X-ray diffraction,and transmission electron microscopy *** to the analyses,the C-F bond in the cycled material is different from that in the pristine state,which presents relatively higher *** finding offers important insights for further improving the performance of the CF_*** work not only demonstrates the CF_x as a high performance cathode for PBs,but also paves a new avenue of exploring conversion-type cathodes for high energy density PBs.

关键词： Potassium batteries Carbon fluoride NMR spectroscopy Conversion reaction Cathode

Constructing Cu2o@Zntpp Ultrathin Nanosheets Heterojunction for Enhanced Photocatalytic Co2 Reduction to Ch4

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SSRN 2024年

作者： Wang, Zhuoyue Min, Shihao Li, Renfu Lin, Wenlie Li, Kang Wang, Shoufeng Kang, Longtian Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research the Structure of Matter Chinese Academy of Sciences Fujian Fuzhou350002 China Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China Fujian Fuzhou350108 China College of Chemistry Fuzhou University Fuzhou350116 China University Chinese Academy of Science Fujian College Fuzhou350002 China

The application of supermolecular naonostructures in the photocatalytic carbon oxide reduction reaction (CO2RR) has attracted increasing attention, however, still face a huge challenge due to low selectivity of multi-electron products and stability. Here, the Cu2O@ZnTPP nanocomposites are successfully constructed with p-type semiconductor zinc tetraphenylporphyrin ultrathin nanosheets (ZnTPP NSs) as a template in the aqueous reaction. Systematic characterizations confirm the formation of type-Ⅱ Cu2O@ZnTPP heterojunction, in which the electron transfer from Cu2O to ZnTPP occurs through the Zn-O-Cu bond under the static contact. Under visible-light irradiation (λ> 420 nm), the optimized Cu2O@ZnTPP composite as CO2RR photocatalyst (120.9 μmol/g/h) exhibits ~ 4 and ~ 10 times higher methane (CH4) evolution rate than individual ZnTPP NSs (28.0 μmol/g/h) and Cu2O (12.8 μmol/g/h), the CH4 selectivity of ~98.7 % and excellent stability. Further experiments reveal that Cu2O/ZnTPP has higher photocatalytic conversion efficiency than Cu2O and ZnTPP NSs, in which the photoinduced electron transfer of ZnTPP molecule →(ZnTPP•ZnTPP)* →ZnTPP‒ →Zn-O-Cu →Cu2O can be identified. Meanwhile, Cu2O@ZnTPP shows the shorter electron-hole separation lifetime (3.3 vs. 9.3 ps) and longer recombination lifetime (23.1 vs. 13.4 ps) than ZnTPP NSs. This work provides a strategy to construct organic nanostructure for photocatalytic CO2RR to multi-electron products. © 2024, The Authors. All rights reserved.

关键词： Methane

Ammonium Intercalation Engineering Regulated Structural Stability of V6o13 Cathodes for Durable Zinc Ion Batteries

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SSRN 2023年

作者： Wu, Ziang Yao, Jia Chen, Chi Chen, Xiang Pan, Xiaoxin Zheng, Junjie Gan, Yi Li, Jingying Liu, Xingtai Xia, Chao Lv, Lin Wang, Hao Wan, Houzhao Hubei Key Laboratory of Micro-Nanoelectronic Materials and Devices School of Microelectronics Hubei University Wuhan430062 China Hubei Yangtze Memory Laboratories Wuhan430205 China CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research the Structure of Matter Chinese Academy of Sciences Fuzhou350002 China Xiamen Institute of Rare Earth Materials Haixi Institute Chinese Academy of Sciences Xiamen361021 China

Aqueous Zn-VO batteries have attracted more and more attention owing to their advantages of high capacity, low cost and stability. Nevertheless, the complex interaction between the inserted ions and the main lattice leading to structural instability, coupled with the interference of highly active free water, these factors lead to vanadium-based zinc batteries usually suffer from severe capacity attenuation. This work reports the optimization strategy of ammonium intercalation engineering to construct a robust V6O13 cathode with ammonium (V6O13-NH4+) for the stability of vanadium-based zinc batteries. Experiments and density functional theory (DFT) calculations illustrate that the ammonium intercalation could reduce the formation energy of VO-NH to improve cycling stability. The V6O13-NH4+ demonstrates high specific capacity (426.5 mAh g-1 capacity at 0.1 A g-1) and high capacity retention rate (80.2%) after 10,000 cycles at 10 A g-1. A soft-packed Zn//VO-NH battery maintains a desired capacity of 252.8 mAh g-1 after 2000 cycles at 5 A g-1. This work proves that the ammonium intercalation is an effective way to achieve highly cycle stable of Aqueous Zn-ion batteries. © 2023, The Authors. All rights reserved.

关键词： Stability

Ostwald Ripening Mechanism-Derived Mnooh Induces Lattice Oxygen Escape for Efficient Aqueous MnO2-Zn Batteries

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SSRN 2023年

作者： Zheng, Junjie Qin, Chenchen Chen, Chi Zhang, Chuankun Shi, Pei Chen, Xin Gan, Yi Li, Jingying Yao, Jia Liu, Xin Cheng, Junyan Sun, Dan Wan, Houzhao Wang, Hao CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou350002 China Hubei Yangtze Memory Laboratories Wuhan430205 China Hubei Key Laboratory of Micro-Nanoelectronic Materials and Devices School of Microelectronics Hubei University Wuhan430062 China Hubei Key Laboratory of Energy Storage and Power Battery School of Mathematics Physics and Optoelectronic Engineering Hubei University of Automotive Technology Shiyan442002 China

Aqueous rechargeable MnO2-Zn batteries have attracted much attention in recent years due to their high security, low cost and environmentally friendly. Nevertheless, the practical application of MnO2 cathode materials is limited by the slow reaction kinetics during cycling and the poor cycle life caused by the disproportionation reaction of Mn. Here, we innovatively prepared MnOOH intermediates via the Ostwald ripening mechanism, followed by thermal treatment to induce lattice oxygen escape to finally obtain oxygen-defect-rich β-MnO2(Od) nanorods. First-principle calculations have shown that the oxygen-defects (Od) enhance the adsorption capability of β-MnO2 for protons, which promote proton mobility and accelerates reaction kinetics. Moreover, the oxygen defects serve as a p-type dopant and provide more evident electron exchange with O to yield better electrical conductivity. The tested Zn//β-MnO2(Od) batteries demonstrated an impressive specific capacity of 330.9 mAh g-1 at 100 mA g-1. After 800 charge-discharge cycles at 1 A g-1, it maintained a capacity of 171 mAh g-1 with a capacity retention rate of 88.9%. This work puts forth a fascinating prospect into the creation of oxygen-defects MnO2 and offers distinct insights towards advancing high efficiency, more productive aqueous zinc ion batteries. © 2023, The Authors. All rights reserved.

关键词： Nanorods

Tunable Magnetic Phase Transition and Room Temperature Magnetocaloric Effect in La0.67ba0.33mno3 Nanoparticles

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SSRN 2024年

作者： Xi, Shaobo Liu, Zhaomei Niu, Haibo Xi 'an Jiaotong University City College Xi’an710018 China Engineering Research Center of Photovoltaic Technologies and Systems Universities of Shaanxi Province China Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Institute of Research on The Structure of Matter Chinese Academy of Sciences Fuzhou350002 China High Magnetic Field Laboratory Chinese Academy of Sciences Hefei230031 China

.67Ba0.33MnO3 particles with the sizes from 17 to 60 nm have been prepared using the sol-gel method and the magnetic properties are studied systematically. We found a tunable critical behavior during ferrimagnetic-paramagnetic (FM-PM) transition in single domain magnetic nanoparticles. The shifts of FM-PM critical transition temperature (TC) and broaden of singularities occurs due to finite size induced thermal fluctuation in the nanoscale thermodynamic system. The critical temperature decreases from 337K to 296K with the decrease of particle size, coupled with broaden of the singularities during the critical transition. As a result of this evolution in the magnetic phase transitions, room temperature magnetocaloric effects (MCE) of the nanoparticles are achieved and the refrigeration efficiency was enhanced significantly. The maximal magnetic entropy change temperature decreases to room temperature (296K) as the particle size reduced. The full-width at half maximum of magnetic entropy change broadens dramatically as the particle size reduces. Thus large maximal relative cooling power (RCP) of 205 J/kg is obtained around room temperature. The broadening of the critical transition and shift of critical temperature in the nanoparticles made them excellent magnetic refrigeration materials near room temperature. © 2024, The Authors. All rights reserved.

关键词： Manganites

Zero-Dimensional Indium-Based Hybrid Halides with Fast Digital Encryption and Decryption, High-Efficiency Wled Via Antimony-Doped

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SSRN 2024年

作者： Jiang, Lulu Wu, Lingkun Sun, Haiyan Yin, Haiyan Zou, Qinghua Deng, Junwen Li, Renfu Ye, Hengyun Li, Jianrong Chaotic Matter Science Research Center International Institute for Innovation Jiangxi University of Science and Technology Ganzhou341000 China CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Key Laboratory of Nanomaterials Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fujian Fuzhou350002 China Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fujian Fuzhou350002 China School of Energy and Mechanical Engineering Jiangxi University of Science and Technology Nanchang330013 China

Lead-free metal halides with thermally induced reversible fluorescence transitions are promising smart optoelectronic materials. However, obtaining such material with reversible and fast fluorescent thermochromism at right temperatures is challenging. Herein, two new (TAEA)InCl6·Cl·4H2O:xSb3+ (1) and (TETA)InCl6·Cl·H2O:xSb3+ (2) (TAEA = Triaminotriethyl-amine, TETA = Triethylenetetramine, x = 0−15%) 0D hybrid perovskites were synthesized and charactered. Compounds 1 and 2 display green and yellow broadband emissions and their high photoluminescence quantum yields (PLQY) of 44.4% and 73.46%, respectively. Interestingly, a reversible transition between green and orange light emission for 1 could be triggered by thermal stimulation, such PL color switching happened in a fast response time of 20 seconds and a right transition temperature of 333 K. In addition, compounds 1 and 2, after being heat-treated, are combined to achieve complex digital encryption and decryption with the assistance of a heat source. Compound 2 has been applied to white light-emitting diodes (WLED) due to its excellent luminous efficiency, and the CRI and CCT of WLEDs are 90.5 and 5415 K, respectively. Finally, we investigated the impact of forming the self-trapped exciton (STEs) state of compound 1 through DFT calculations and femtosecond transient absorption (fs-TA) techniques. We analyzed its complex emission mechanism in detail. This work provides new insights into the design of materials with multiple optical properties based on hybrid metal halides, paving the way to obtain materials for multiple optical applications. © 2024, The Authors. All rights reserved.

关键词： Metal halides