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A simple solvothermal route towards the morphological control of ZnO and tuning of its optical and photocatalytic properties

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Science china.chemistry 2010年第8期53卷 1711-1717页

作者： JIANG YaQi,LI FangFang,sun Ran,xie zhaoxiong & zheng lansun state key laboratory for physical chemistry of solid surfaces department of chemistry,college of chemistry and chemical engineering,xiamen university,xiamen 361005,china 1. state key laboratory for physical chemistry of solid surfaces department of chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China

ZnO nanoparticles with different morphologies were solvothermally synthesized by controlling the alkali (sodium hydroxide) concentration in an isopropanol *** products were characterized by means of powder X-ray diffraction,UV-visible absorption spectra,scanning electron microscopy,transmission electron microscopy,and selected area electron *** morphologies of the formed ZnO nanocrystals were dependent on the concentration of the alkali,and with increases of sodium hydroxide concentration,the ZnO nanocrystals evolved from rod to hexagonal bipyramid,and then to a flower-like *** flower-like nanostructure resulted from the etching of the hexagonal bipyramid by the excess *** photoluminescence and photocatalytic properties of the prepared ZnO were *** difference of green emission among the ZnO nanocrystals indicated that a higher sodium hydroxide concentration led to a higher level of *** size,the surface structure and defects in the ZnO nanocrystals affected its photo-degradation characteristics.

关键词： zinc oxide solvothermal method nanocrystal photoluminescence photocatalysis

Controllable incorporation of CdS nanoparticles into TiO_2 nanotubes for highly enhancing the photocatalytic response to visible light

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Science china.chemistry 2009年第12期52卷 2148-2155页

作者： WANG ChengLin1,sun lan1,xie KunPeng1 & LIN ChangJian1,2 1 department of chemistry,college of chemistry and chemical engineering,xiamen university,xiamen 361005,china.2 state key laboratory of physical chemistry of solid surfaces,xiamen university,xiamen 361005,china 1. department of chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China 2. state key laboratory of physical chemistry of solid surfaces Xiamen University Xiamen 361005 China

A constant current electrochemical deposition was employed to incorporate CdS nanoparticles into the TiO2 nanotube arrays (TiO2NTs). The size and amount of CdS nanoparticles in TiO2NTs (CdS@TiO2NTs) were controllable via modulating current,deposition time and electrolyte concentration. It was revealed,from the scanning electron microscopy (SEM) images and X-ray photoelectron spectroscopy (XPS) in depth profile,that CdS nanoparticles were filled into TiO2 nanotubes. A shift of the absorption edge toward the visible region under the optimal electrodeposition condition was observed with the diffuse reflectance spectroscopy (DRS). A 5-fold enhancement in the photocurrent spectrum for TiO2NTs was observed and the photocurrent response range was significantly extended into the visible region because of the CdS incorporation. Compared with pure TiO2NTs,under a visible light irradiation,CdS@TiO2NTs exhibited a 3.5-fold improvement of photocatalytic activity,which was demonstrated by the photocatalytic decomposition of Rhodamine B (RhB).

关键词： TiO2 nanotube CdS photocatalysis RhB

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Foreword

电化学 2012年第5期18卷 385-386页

作者： Dr.Bin Ren Professor of chemistry state key laboratory of physical chemistry of solid surfaces,college of chemistry and chemical engineering,xiamen university,xiamen 361005,china

On the request of ***-Gang sun,Editor-in-Chief of Journal of Electrochemistry,I served asthe guest editor for this International Special Issueon Current *** Journal of Electrochemistry was founded in1995 associated

关键词：电化学电化学平衡电解质电解

Interaction of citrate with Pt(100) surface investigated by cyclic voltammetry towards understanding the structure-tuning effect in nanomaterials synthesis

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中国科学:化学 2012年第11期42卷 1653-1654页

作者： CHEN DeHao,YE JinYu,XU ChangDeng,LI Xin,LI JunTao,ZHEN ChunHua,TIAN Na,ZHOU ZhiYou & sun ShiGang state key laboratory of physical chemistry of solid surfaces department of chemistry,college of chemistry and chemical engineering and School of Energy Research,xiamen university,xiamen 361005,china state key laboratory of physical chemistry of solid surfaces department of chemistry college of chemistry and chemical engineering and School of Energy Research xiamen university xiamen 361005 china

This study aims to understand the effects of functional agents such as capping agents,stabilizers,surfactants and additives in shape-controlled synthesis of *** well-defined Pt(100) single crystal surface was used as a model to investigate its interaction with citrate,a capping agent that is often used in shape-controlled synthesis of *** demonstrated that,through a systematic study of electrochemical cyclic voltammetry,the presence of citrate in solution could increase the current peak density of hydrogen adsorption at high potential (j p,L),while decrease proportionally the current peak density of hydrogen adsorption at low potential (j p,S).Furthermore,the increase of citrate concentration shifted negatively the peak potentials (E p,L and E p,S) of both j p,L and j p,*** results indicated that the interaction of citrate with Pt(100) surface could induce increasing the (100) surface domains of two-dimensional long range order (2D-(100)),and decreasing the (100) surface domains of one-dimensional short range order (1D-(100)).It also revealed that the interaction of citrate with Pt(100) surface could stabilize the 2D-(100) *** findings gained in this study implied that the citrate may lead to form stable 2D-(100) domains on Pt nanoparticles upon the shape-controlled synthesis of Pt nanomaterials.

关键词： citrate interaction Pt(100) adsorption

Quantum chemistry Study on Structures of Cluster Ions Nb_(n)S_(m)^(±)Generated by Laser Mass Spectra

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chemical Research in Chinese Universities 1994年第2期10卷 107-114页

作者： MA Yan-hui LIN Meng-hai zheng lan-sun and LIU Hong-lin(state key laboratory for physical chemistry of the solid Surface ,department of chemistry , xiamen Unirersity, xiamen, 361005 )

ccording to the chemical bond theory we designed geometric structures ofcluster ions Nb_nS generated by laser ablation and calculated their electronic struc-tures using DV-X_a method of quantum chemistry. The results show that with theincrease of the cluster size the structures of the cluster ions change from a single-chain to a double-chain, then to a planar-net, and linking up to a net at Nb_3. Thenegative cluster ions tend to form a divergent configuration due to the extra chargeson it.

关键词： Laser mass spectra Cluster ions Nb_nS Structure design Quantumchemistry calculation

Shape Evolution of Au-Pd Alloy Nanocrystals from Rhombic Dodecahedron to Trisoctahedron and Hexoctahedron

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Shape Evolution of Au-Pd Alloy Nanocrystals from Rhombic Dod...

中国化学会第六届全国结构化学学术会议

作者： Jia-Wei Zhang,zhao-xiong xie~*,lan-sun zheng state key laboratory of physical chemistry of solid surfaces,department of chemistry,college of chemistry and chemical engineering,xiamen university,xiamen,361005,china

＜正＞The surface structure controlled synthesis of noble metal nanocrystals（NCs） bounded by high-index facets has become a hot topic due to their potential of significantly improving the catalytic performance in the catalytic *** study reports the preparation of monodisperse Au-Pd alloy NCs with systematic shape evolution from rhombic dodecahedral（RD） to trisoctahedral（TOH）,and hexoctahedral

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Enhancing the Photocatalytic Activity of Anatase TiO2 by Improving the Specific Facets-Induced Spontaneous Separation of Photogenerated Electrons and Holes

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Enhancing the Photocatalytic Activity of Anatase TiO2 by Imp...

中国化学会第六届全国结构化学学术会议

作者： Chang Liu,Qin Kuang,~* zhao-xiong xie,~* lan-sun zheng state key laboratory for physical chemistry of solid surfaces & department of chemistry,college of chemistry and chemical engineering,xiamen university,xiamen, 361005(china.

Recently,it has been proved that directional flow of photogenerated charge carriers occur on the specific facets of TiO *** this paper,we demonstrated that photocatalytic activity of anatase TiO nanocrystals in both photoreduction and photooxidation processes can be enhanced by selectively depositing Pt nanoparticles on the {101} facets,which strengthens spontaneously surface-induced

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Temperature-controlled formation of lanthanide and chelidonic acid-based 1D,2D and 3D coordination polymers

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Temperature-controlled formation of lanthanide and chelidoni...

中国化学会第五届全国结构化学学术会议

作者： Jun zhao La-Sheng Long~* Rong-Bin Huang lan-sun zheng state key laboratory of physical chemistry of solid Surface and department of chemistry,college of chemistry and chemical engineering,xiamen university,xiamen 361005,china.

Chelidonic acid,as a natural product in some kinds of plants,has shown notably photophysical property,in the work,we report the synthesis and crystal structure of three lanthanide-based coordination polymers,namely,[G...

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Anchoring heterometallic cluster on P-doped carbon nitride for efficient photocatalytic nitrogen fixation in water and air ambient

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Chinese chemical Letters 2024年第4期35卷 176-180页

作者： Chao-Long Chen Rong Chen La-Sheng Long lan-sun zheng Xiang-Jian Kong Collaborative Innovation Center of chemistry for Energy Materials State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

Light-driven nitrogen fixation to produce ammonia is a green and economical technology of nitrogen reduction but is still quite challenging, especially in an air atmosphere without any sacrificial ***, we demonstrate efficient photocatalytic nitrogen fixation using water and air directly by loading lanthanide–transition metal(4f–3d) cluster NdCo_(3) on two-dimensional P-doped graphitic carbon nitrides(PCN) material surface. Benefiting from the increase in the number of nitrogen vacancies(NVs) and highly matched band gap structure and excellent hole trapping ability of clusters, the NdCo_(3)/PCN photocatalyst exhibits efficient nitrogen reduction activity with 371(in air) and 825 μmol h^(-1)g^(-1)(in pure nitrogen)without any sacrificial reagents. The introduction of potassium sulfate inhibits hydrogen production and promotes nitrogen reduction activation. This work suggests that anchoring precisely structured clusters on 2D materials may enhance photocatalytic nitrogen reduction under normal temperature and pressure.

关键词： Photocatalytic Nitrogen fixation 4f-3d Cluster Air atmosphere