中国科技论文在线

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2005年04月25日

【期刊论文】Low temperature synthesis of nanocrystalline Mn O by a 3 4 solvothermal method

张卫新， Zhang Weixin， Wang Cheng， Zhang Xiaoming， Xie Yi， Qian Yitai

Solid State Ionics 117(1999)331-335，-0001，（）：

-1年11月30日

Nanocrystalline trimanganese tetroxide (Mn O ) has been successfully synthesized by a solvothermal reaction in which 3 4 KMnO is reduced by CH OH or CH CH OH under pressure. Alcohol also served as the solvent in the method. The 4 3 32 reaction temperature can be as low as 80-1008C. Transmission electron micrographs and X-ray powder diffraction patterns show that the average particle sizes are 9-15 nm. From the electron spin resonance (ESR) pattern, hyperfine structure (six 21 31 absorption peaks of ESR) of Mn ion is observed on the main line of Mn. The mechanism for the formation of crystalline Mn O is proposed.

Solvothermal method， Nanocrystalline， Trimanganese tetroxide， Reduction， Synthesis

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2005年04月25日

【期刊论文】Synthesis and characterization of nanostructured Li2MnO3 from nanostructured MnOOH precursors Abstract

张卫新， Weixin Zhang， Yi Liu， Zeheng Yang， Shupei Tang， Min Chen

Solid State Communications 131(2004)441-445，-0001，（）：

-1年11月30日

摘要

Li2MnO3 with different nanostructures was synthesized through a solid-state reaction. MnOOH nanorods and nanowires prepared via the hydrothermal method were used as precursors, respectively, to react with Li (OH). H2O to prepare nanostructured Li2MnO3 in the temperature range from 500 to 800 8C. The samples were characterized by XRD, TEM, ESR and FTIR results. Based on the experimental results, the dehydration-oxidation-combination (DOC) formation mechanism of Li2MnO3 was proposed.

A.， Nanostructures， B.， Chemical synthesis， C.， Transmission electron microscopy， C.， X-ray diffraction

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2005年04月25日

【期刊论文】Low temperature gruowth of bismuth sulfide nanorods by a hydrothermal method

张卫新， Weixin Zhang a， b， Zeheng Yangb， Xinmin Huang b， Shuyuan Zhang a， Weichao Yu a， Yitai Qiana， Guien Zhoua， Li Yang a

Solid State Communications 119(2001)143-146，-0001，（）：

-1年11月30日

摘要

Hydrothermal reaction of Bi and Produces nanorods in the temperature range of X-ray powder diffraction indicates that the product is orthorhombic with cell constants.

A.， Nanostructures， A.， Chemical synthesis， B.， Scanning and transmssion electron microscopy

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2005年04月25日

【期刊论文】A hydrothermal synthesis of orthorhombic nanocrystalline cobalt diselenide CoSe2 Abstract

张卫新， Weixin Zhang a， b， Zeheng Yang b， Juewen Liu a， Zehua Hui b， Weichao Yu a， Yitai Qian a， Guien Zhou a， Li Yang a

Materials Research Bulletin 35(2000)2403-2408，-0001，（）：

-1年11月30日

摘要

Nanocrystalline CoSe2 was successfully synthesized in the temperature range 90-170à℃ through a hydrothermal method. All the reflections in the XRD pattern of CoSe2 could be indexed as an orthorhombic system with cell parameters a 5 3.589, b 5 4.838, and c 5 5.713 Å. TEM images of the products showed a rod-like morphology. Disproportionation products of selenium in alkaline aqueous solution provide a convenient chalcogen source and make possible the synthesis of ransitionmetal selenides under hydrothermal conditions. The mechanism of the formation of CoSe2 is proposed.

A.， Chalcogenides， A.， Inorganic compounds， B.， Chemical synthesis， C.， X-ray diffraction， D.， Crystal structure

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2005年04月25日

【期刊论文】Synthesis and Characterization of Uniform Arrays of Copper Sulfide Nanorods Coated with Nanolayers of Polypyrrole

张卫新， Weixin Zhang， Xiaogang Wen， and Shihe Yang

Langmuir 2003, 19, 4420-4426，-0001，（）：

-1年11月30日

摘要

This work was supported by an RGC grant administered by the UGC of Hong Kong. We thank Dr. Suhua Wang for his help during the initial experiment and Dr. Yesha Zheng and MCPF of HKUST for assistance in sample haracterization.

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