室温下一步合成化学计量比确定的金属氧化物纳米颗粒。

One-step synthesis of stoichiometrically defined metal oxide nanoparticles at room temperature.

作者信息

Chen Lan, Xu Ju, Tanner David A, Phelan Richard, Van der Meulen Machteld, Holmes Justin D, Morris Michael A

机构信息

Department of Chemistry, University College Cork, Cork, Ireland.

出版信息

Chemistry. 2009;15(2):440-8. doi: 10.1002/chem.200800992.

DOI:10.1002/chem.200800992

PMID:18991306

Abstract

A great variety of metal oxide nanoparticles have been readily synthesized by using alkali metal oxides, M(2)O (M is Na or Li) and soluble metal salts (metal chlorides) in polar organic solutions, for example, methanol and ethanol, at room temperature. The oxidation states of the metals in the resulting metal oxides (Cu(2)O, CuO, ZnO, Al(2)O(3), Fe(2)O(3), Bi(2)O(3), TiO(2), SnO(2), CeO(2), Nb(2)O(5), WO(3), and CoFe(2)O(4)) range from 1 to 6 and remain invariable through the reactions where good control of stoichiometry is achieved. Metal oxide nanoparticles are 1-30 nm and have good monodispersivity and displayed comparable optical spectra. These syntheses are based on a general ion reaction pathway during which the precipitate occurs when O(2-) ions meet metal cations (M(n+)) in anhydrous solution and the reaction equation is M(n+) + n/2 O(2-) --> MO(n/2) (n=1-6).

摘要

通过在极性有机溶剂（如甲醇和乙醇）中，于室温下使用碱金属氧化物M₂O（M为Na或Li）和可溶性金属盐（金属氯化物），已轻松合成了各种各样的金属氧化物纳米颗粒。所得金属氧化物（Cu₂O、CuO、ZnO、Al₂O₃、Fe₂O₃、Bi₂O₃、TiO₂、SnO₂、CeO₂、Nb₂O₅、WO₃和CoFe₂O₄）中金属的氧化态范围为1至6，并且在实现化学计量良好控制的反应过程中保持不变。金属氧化物纳米颗粒的尺寸为1 - 30纳米，具有良好的单分散性，并呈现出可比的光谱。这些合成基于一般的离子反应途径，在此过程中，当O²⁻离子在无水溶液中与金属阳离子（Mⁿ⁺）相遇时会发生沉淀，反应方程式为Mⁿ⁺ + n/2 O²⁻ → MO(n/2) （n = 1 - 6）。