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A breakthrough in electrocatalysis of CO2 conversion

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National Science Review 2017年第2期4卷 155-156页

作者： Zhi-You Zhou Shi-Gang Sun state key laboratory of physical chemistry of solid surfaces Xiamen University

Increasing consumption of fossil fuels has resulted in dramatic increase of CO2concentration in the atmosphere,which results in a series of environmental problems such as the greenhouse effect and ocean *** reduction ... 详细信息

关键词： In CO

Effect of glutathione on in vivo biodistribution and clearance of surface-modified small Pd nanosheets

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Science China chemistry 2015年第11期58卷 1753-1758页

作者： Yizhuan Huang Xiaolan Chen Saige Shi Mei Chen Shaoheng Tang Shiguang Mo Jingping Wei Nanfeng Zheng state key laboratory for physical chemistry of solid surfaces Department of chemistry College of Chemistry and Chemical EngineeringXiamen University

Plasmonic Pd nanosheets have been emerging as promising materials for application in near-infrared(NIR) photothermal therapy(PTT) of cancer. However, animal in mice studies indicated that the original synthesized poly(vinylpyrrolidone)(PVP)-protected small Pd nanosheets(Pd-PVP) and some further surface-modified small Pd nanosheets such as Pd-PEG(SH) easily accumulated in reticuloendothelial system(RES) organs(liver, spleen, etc.) and were difficult to be cleared from these organs quickly. In the work, we surprisingly found that glutathione(GSH) could promote the clearance of surface-modified small Pd nanosheets(e.g. Pd-PVP, Pd-PEG(SH) and Pd-GSH) from the RES organs efficiently. The effects of GSH on the biodistribution and clearance of different surface-modified Pd nanosheets were investigated. Our results indicated that these surface-modified Pd nanosheets with or without GSH added caused no morbidity at target primary organs, and GSH can promote the clearance of different surface-modified Pd nanosheets in the order of Pd-PVP≈Pd-PEG(SH)>Pd-GSH. This study suggests that glutathione could be an attractive reagent for promoting nanomaterials eliminated from the reticuloendothelial systems(RES).

关键词： noble metal nanomaterials glutathione biodistribution renal clearance

Copper/cuprous sulfide electrode: preparation and performance

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Science China chemistry 2015年第6期58卷 1039-1043页

作者： Lina Xiao Ding Yuan Pei Li Li Huang Bing-Wei Mao Dongping Zhan state key laboratory for physical chemistry of solid surfaces Department of chemistry College of Chemistry and Chemical Engineering Xiamen University

Cuprous sulfide （Cu2S） is a direct band-gap p-type semiconductor with excellent ionic/electronic hybrid conductivity. Alt- hough Cu/Cu2S/sulfide or polysulfide system is adopted as counter electrode of quantum-dots-sensitized solar cells （QDSSC）, the electrode process is seldom reported. Here, the electrochemical growth of Cu2S film on a copper （Cu） surface, the redox behaviors of sulfide and polysulfide, and the all-in-solid charge-transfer properties of Cu2S film are investigated. It is clarified that the copper electrode simultaneously undergoes an activated process, a membrane growth process, and a redox phase transformation process. The solid charge-transfer capability of CuzS is quantified with a high exchange-current density of 2.27 A/cm2, which elucidates that the Cu/CuzS electrode is a qualified material for counter electrodes of QDSSC. These results aid understanding of the physicochemical mechanism of QDSSC with a polysulfide electrolyte and Cu/Cu2S counter electrode.

关键词： quantum dots sensitized solar cells counter electrode cuprous sulfide film growth

Ab initio VB Studies of the Ground and Low-lying Excited states of BeH and BH

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Chinese Journal of chemistry 2003年第8期21卷 1005-1010页

作者：廖新丽莫亦荣吴玮张乾二 Department of chemistry State Key Laboratory for Physical Chemistry of Solid Surfaces Center for Theoretical Chemistry Xiamen University

A scheme has been proposed to classify valence bond (VB) wave functions for the calculations of ground and excited states, according to the symmetry properties of one electron orbitals which are involved in the construction of VB wave functions. This scheme is illustrated by the examples of BeH and BH. Ab initio VB computations of these two test molecules in combination with the present classification scheme give reliable results. For example, calculation results show that the state C 2Σ +of BeH is stable, with the bonding energy 0 87 eV and bond length 0 238 nm, which are in good agreement with those obtained by Gerratt et al . The bonding features of ground and low lying excited states of BeH and BH are discussed.

关键词： valence bond theory excited state BeH BH

Molecular behavior of the aptamer HJ24 self-assembled on highly oriented pyrolytic graphite(HOPG)

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Science China chemistry 2015年第12期58卷 1858-1865页

作者： Xueqin Zhao Yishun Huang Chaoyong James Yang Bingwei Mao College of Life Sciences Zhejiang Sci-Tech University state key laboratory of physical chemistry of the solid surfaces

Nucleic acid sensing analysis has been widely applied to the fields of food quality control, environmental monitoring, and medical diagnosis. A key step in developing effective DNA-based electrochemical biosensors is to obtain a biorecognition layer on the biosensor, which can be influenced by many factors. Hence, we constructed a series of HJ24 layers on highly oriented pyrolytic graphite to investigate the relation between the configuration of the adsorbed probe HJ24 and the redox property using atomic force microscopy and voltammetry. We used HJ24 for its diagnostic value as it specifically recognizes the SH2 domain-containing phosphatase, a critical contributor in many important signaling pathways. The results demonstrated that increasing K ions induced G-quartet oxidation peak occurrence/increase([K+]?400 mmol/L), and also resulted in the formation of more compact single strand sheets([K+]?300 mmol/L). Moreover, transitions of molecule configurations and redox currents of G-quartets were observed at low concentration [K+]=12 mmol/L, which may indicate the appearance of new configurations under this condition. Besides, by analyzing atomic force microscopy(AFM) images, it was found that the different adsorbed configurations are correlated with the HJ24 concentration, the basal configuration, and the linker group on the HJ24 sequence. This information may be useful for understanding the adsorption process of HJ24 as well as for the further development of practical applications for HJ24 films on DNA electrochemical sensors, and may ultimately help improve the diagnosis and treatment of patients with SHP2-related diseases.

关键词： self-assembly G-quadruplex DNA SHP2 Atomic force microscopy HOPG

Advances in microwave absorbing materials with broad-bandwidth response

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Nano Research 2023年第8期16卷 11054-11083页

作者： Susu Bao Meixi Zhang Zhiyuan Jiang Zhaoxiong Xie Lansun Zheng state key laboratory for physical chemistry of solid surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

Microwave absorbing materials(MAMs)are playing an increasingly essential role in the development of wireless communications,high-power electronic devices,and advanced target detection *** with a broad-bandwidth response are particularly important in the area of communication security,radiation prevention,electronic reliability,and military *** considerable progress has been made in the design and preparation of MAMs with a broad-bandwidth response,a number of challenges still remain,and the structure–function relationship of MAMs is still far from being completely ***,the advances in the design and research of MAMs with a broad-bandwidth response are *** main strategies for expanding the effective absorption bandwidth of MAMs are comprehensively summarized considering three perspectives:the chemical combination strategy,morphological control strategy,and macrostructure control *** important results as well as design principles and absorption mechanisms are highlighted.A coherent explanation detailing the influence of the chemical composition and structure of various materials on the microwave absorption properties of MAMs is *** main challenges,new opportunities,and future perspectives in this promising field are also presented.

关键词： microwave absorbing materials broad-bandwidth response magnetic-dielectric synergy morphology control macrostructure control

Synthesis and Crystal Structure of a New Double 2D Layer Complex Assembled by H_4btec

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Chinese Journal of Structural chemistry 2008年第12期27卷 1445-1450页

作者：封霞张曙光冯云龙蓝尤钊温一航 Zhejiang key laboratory for Reactive chemistry on solid surfaces Institute of Physical ChemistryZhejiang Normal University

Assembly of H4btec with cobalt（Ⅱ） acetate afforded a new double 2D layer coordination polymer, [Co（bteC）1/2（H2O）4·2H2O]n （H4btec = benzene-1,2,4,5-tetracarboxylic acid） 1. The polymeric structure has been characterized by single-crystal X-ray diffraction, FT-IR and thermal analysis. The crystal is of triclinic, space group PI with a = 10.8762（2）, b = 11.1411（1）, c = 11.5084（3） A, a = 82.8950（10）, β = 63.0050（10）, γ = 62.1500（10）°, V = 1091.72（4） A^3, C5H13CoO10, Mr= 292.08, Z = 4, Dc = 1.777 g/cm^3, μ = 1.612 mm^-l, F（000） = 600, R = 0.0578, and wR = 0.2162 for 3576 observed reflections （Ⅰ 〉 2σ（Ⅰ））. Complex 1 consists of a new double 2D layer structure [Co（btec）1/2（H2O）4]n, both consisting of 4 ＋ 4 grids with the sizes of 11.3667（2）A × 11.5084（3）A （Co（1）-Co（1A） × Co（2A）-Co（2B）） and 11.5084（3）A × 11.3667（2）A （Co（3）-Co（3C） × Co（4）- Co（4A））, respectively. The phenyl rings are at the comers while the Co（Ⅱ） atoms are in the sides of the grids, and lattice water molecules decorate between the layers. Hydrogen bonds between the layers and lattice water molecules result in the final 3D framework.

关键词： Co(Ⅱ) complex benzene-1,2,4,5-tetracarboxylic acid crystal structure hydrogen bond

Synthesis,Structure and Characterization of a Cd(Ⅱ) Polymer Based on 6-Hydroxynicotinic Acid

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Chinese Journal of Structural chemistry 2008年第9期27卷 1073-1078页

作者：何银华郭芷含冯云龙 Zhejiang key laboratory for Reactive chemistry on solid surfaces Institute of Physical ChemistryZhejiang Normal University

A new 2D layered Cd（Ⅱ） coordination polymer, [Cd（HnicO）（phen）（NOa）]n 1 （H2nicO = 6-hydroxynicotinic acid, phen = 1,10-phenanthroline）, has been hydrothermally synthesized and characterized by elemental analysis, IR, and single-crystal X-ray diffraction. It crystallizes in the monoclinic system, space group P21/c with a = 11.1107（2）, b = 13.7639（2）, c = 12.1457（4）A, β = 108.695（1）°, V = 1759.40（7） A^3 Z = 4, Mr= 492.72, F（000） = 976, Dc = 1.860 g/cm^3,μ= 1.289 mm^-1, the final R = 0.0205 and wR = 0.0550 for 3663 observed reflections （I 〉 2σ（I））. X-ray single-crystal structural analyses reveal that in complex 1, the HEnicO ligands and Cd（Ⅱ） nodes define the structure to be （4,4） 2D nets which are further assembled into the final 3D architecture via supramolecular interactions such as hydrogen bonds and aromatic interactions. Moreover, the solid-state luminescent study shows the title polymer possesses intense luminescent property at room temperature.

关键词： 6-hydroxynicotinic acid Cd(Ⅱ) complex crystal structure luminescent property

CVD synthesis of nitrogen-doped graphene using urea

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Science China(Physics,Mechanics & Astronomy) 2015年第10期58卷 94-99页

作者： ZHANG CanKun LIN WeiYi ZHAO ZhiJuan ZHUANG PingPing ZHAN LinJie ZHOU YingHui CAI WeiWei Department of Physics Laboratory of Nanoscale Condense Matter Physics and State Key Laboratory of Physical Chemistry of Solid SurfacesXiamen University

This work provides an effective low-cost synthesis and in-depth mechanistic study of high quality large-area nitrogen-doped graphene(NG) films. These films were synthesized using urea as nitrogen source and methane as carbon source, and were characterized by scanning electron microscopy(SEM), Raman spectroscopy and X-ray photoelectron spectroscopy(XPS). The N doping level was determined to be 3.72 at.%, and N atoms were suggested to mainly incorporated in a pyrrolic N configuration. All distinct Raman peaks display a shift due to the nitrogen-doping and compressive strain. The increase in urea concentration broadens the D and 2D peak's Full Width at Half Maximum(FWHM), due to the decrease of mean free path of phonons. The N-doped graphene exhibited an n-type doping behavior with a considerably high carrier mobility of about 74.1 cm2/(V s), confirmed by electrical transport measurements.

关键词： nitrogen-doped graphene chemical vapor deposition Raman spectroscopy X-ray photoemission spectroscopy