高度有序的混合价态介孔氧化钼的形态发生

Morphogenesis of highly ordered mixed-valent mesoporous molybdenum oxides.

作者信息

Chen Jinglu, Burger Christian, Krishnan Chirakkal V, Chu Benjamin

机构信息

Chemistry Department, Stony Brook University, Stony Brook, NY 11794-3400, USA.

出版信息

J Am Chem Soc. 2005 Oct 19;127(41):14140-1. doi: 10.1021/ja054023v.

DOI:10.1021/ja054023v

PMID:16218581

Abstract

Control of the size, shape, and structure of mesoporous transition metal oxide materials is important in their correlations with corresponding optoelectronic and photocatalytic properties. Highly ordered cubic phases of mixed-valent mesoporous molybdenum oxides have been prepared by the reduction and decomposition of aqueous molybdenum precursor solution in the presence of poly(ethylene oxide) under ultrasonic irradiation. Large-scale uniform molybdenum oxide particles with well-defined crystal-like morphologies (ball-like, rhombic dodecahedral, and cubic shapes) were synthesized and found to be controllable by modifying the molecular chain length of the polymeric additive. Molybdenum oxides with an average oxidation state of 4.8 form a cubic lattice of open mesoporous structures.

摘要

介孔过渡金属氧化物材料的尺寸、形状和结构的控制对于它们与相应的光电和光催化性能之间的关联非常重要。通过在超声辐照下，在聚环氧乙烷存在的情况下，对钼前驱体水溶液进行还原和分解，制备出了混合价态介孔钼氧化物的高度有序立方相。合成了具有明确晶体状形态（球状、菱形十二面体状和立方状）的大规模均匀钼氧化物颗粒，并发现通过改变聚合物添加剂的分子链长度可以对其进行控制。平均氧化态为4.8的钼氧化物形成了开放介孔结构的立方晶格。