Xu Jing, Hu Chenguo, Han Huayong, He Mingquan, Wan Buyong, Xia Chuanhui, Tian Yongshu
Physics Department, Chongqing University, Chongqing 400044, PR China.
J Nanosci Nanotechnol. 2011 Dec;11(12):10829-33. doi: 10.1166/jnn.2011.4038.
V3O7 x H2O nanobelts have been synthesized via a hydrothermal route. Monoclinic V3O7, nanobelts could be obtained by thermal decomposition of V3O7 x H2O nanobelts at 400 degrees C. The synthesized products were characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. It was found that the V3O7 x H2O is of orthorhombic phase and single crystalline nanobelts with width of 100-500 nm and length up to 100 microm. The formation mechanism of the V3O7 x H2O nanobelts was discussed. Light sensitivity in exposure to a simulated sunlight in different intensity and biases have been investigated on the electrode made from the V3O7 x H2O and V3O7, nanobelts. The results show that the photocurrent intensity of the V3O7 nanobelts is much larger than that of the V3O7 x H2O nanobelts. The fast current response has been observed under alternative control of light on and off at 2 s interval.
通过水热法合成了V3O7·xH2O纳米带。通过在400℃下热分解V3O7·xH2O纳米带可得到单斜晶系的V3O7纳米带。采用X射线衍射、扫描电子显微镜和透射电子显微镜对合成产物进行了表征。结果表明，V3O7·xH2O为正交相，是宽度为100 - 500nm、长度可达100μm的单晶纳米带。探讨了V3O7·xH2O纳米带的形成机理。研究了由V3O7·xH2O和V3O7纳米带制成的电极在不同强度和偏压下暴露于模拟阳光下的光敏性。结果表明，V3O7纳米带的光电流强度远大于V3O7·xH2O纳米带。在以2s为间隔交替控制光的开和关的情况下观察到了快速的电流响应。
