Li Guicun, Chao Kun, Peng Hongrui, Chen Kezheng, Zhang Zhikun
Key Laboratory of Nanostructured Materials, Qingdao University of Science and Technology, Qingdao 266042, People's Republic of China.
Inorg Chem. 2007 Jul 9;46(14):5787-90. doi: 10.1021/ic070339n. Epub 2007 Jun 5.
Low-valent vanadium oxide nanostructures have been synthesized in large quantities using commercial V2O5 powder as the precursor by a facile reduction method. The crystal structures and morphologies of vanadium oxide nanostructures can be adjusted by altering the concentrations and types of reductants. VO2(B) nanostructures are fabricated using oxalic acid as the reductant. VO2(B) nanobelts with widths of 80-150 nm, thicknesses of 20-30 nm, and lengths up to several micrometers can evolve to olive-like nanostructures composed of nanosheets with thicknesses of several nanometers and lateral dimensions of several micrometers as the concentration of oxalic acid increases. H2V3O8 nanobelts with widths of 200-300 nm, thicknesses of 10-20 nm, and lengths up to several 10s of micrometers are obtained under the reduction of V2O5 powder with ethanol. The belt-shaped morphologies of H2V3O8 are not affected by the concentration of ethanol.
以市售五氧化二钒粉末为前驱体，通过简便的还原方法大量合成了低价氧化钒纳米结构。通过改变还原剂的浓度和类型，可以调控氧化钒纳米结构的晶体结构和形貌。以草酸为还原剂制备了VO2(B)纳米结构。随着草酸浓度的增加，宽度为80-150nm、厚度为20-30nm、长度可达几微米的VO2(B)纳米带可演变成由厚度为几纳米、横向尺寸为几微米的纳米片组成的橄榄状纳米结构。在乙醇还原五氧化二钒粉末的条件下，获得了宽度为200-300nm、厚度为10-20nm、长度可达几十微米的H2V3O8纳米带。H2V3O8的带状形貌不受乙醇浓度的影响。
