Titanium dioxide/vanadate nanometer heterojunction and preparation method therefor and application thereof

The invention relates to a titanium dioxide/vanadate nanometer heterojunction and a preparation method therefor and an application thereof. The invention adopts a hydrothermal method to synthesize TiO2 nanoparticle modified Ag2V4O11 nanowires. The TiO2/Ag2V4O11 nanoheterostructure in the invention exhibits good selectivity and gas-sensitive response to ethanol, wherein the preferred molar ratio ofTiO2 to Ag2V4O11 is from 1 to 8:1. Compared with TiO2 nanoparticles, the gas-sensitive properties of TiO2/Ag2V4O11 nano-heterostructure gas-sensitive materials formed by the coupling and modificationof Ag2V4O11 with narrow band gap width have been greatly improved. The preparation process is simple, environment-friendly and low in cost, and has a wide application prospect in the field of gas detection. 本发明涉及种二氧化钛/钒酸银纳米异质结及其制备方法和应用。本发明采用水热法，合成了TiO纳米颗粒修饰的AgVO纳米线。本发明所述的TiO/AgVO纳米异质结构对乙醇表现出了良好的选择性及气敏响应，其中TiO与AgVO的优选摩尔比为1～8:1。相比于TiO纳米颗粒，通过窄禁带宽度的AgVO耦合改性后所形成的TiO/AgVO纳米异质结构气敏材料，其气敏性能得到了大幅提高。本发明制备工艺简单、环境友好、成本低廉，在气体检测领域具有广阔的应