Hydrothermal preparation of Na0.5Bi0.5TiO3 nanospheres towards high humidity sensing response
Hydrothermal preparation of Na0.5Bi0.5TiO3 nanospheres towards high humidity sensing response
复制标题
水热制备 Na0.5Bi0.5TiO3 纳米球以实现高湿度传感响应
DOI：
10.1016/j.snb.2021.130584
复制
发表时间：
2021-08-24
影响因子：
8.4
通讯作者：
Wang, Chunchang
中科院分区：
文献类型：
--
作者：
Li, Li;Xuan, Xiaoqi;Wang, Chunchang
采用一锅法水热合成了由纳米片组装而成的Na 0. 5 Bi 0. 5 TiO 3纳米球。Na_（0.5）Bi_（0.5）TiO_3湿敏元件在200 Hz时，在11-94%的相对湿度范围内，阻抗变化超过5个数量级。获得了S = 172568的铁电敏感响应值，这优于大多数铁电材料。发现响应/恢复时间与从11- 94%RH恢复到11%RH的43/87 s相似。滞后值计算为13.5%。Na_（0.5）Bi_（0.5）TiO_3的高灵敏度可能与其独特的纳米结构和水热法有关。结果表明，Na 0. 5 Bi 0. 5 TiO 3纳米微球在高响应湿敏元件的构建中具有良好的应用前景。
The Na0.5Bi0.5TiO3 nanospheres assembled by nanosheets were successfully synthesized by a one-pot hydrothermal method. The Na0.5Bi0.5TiO3 humidity sensor shows impedance variation more than five orders of magnitude in the whole relative humidity (RH) range from 11-94% at 200 Hz. An ultrahigh sensing response value of S = 172568, was achieved, which is better than that of most ferroelectric materials. The response/recovery time was found to be similar to 43/87 s from 11-94% RH and back to 11 % RH. The value of hysteresis was calculated to be 13.5 %. The high sensing response of the Na0.5Bi0.5TiO3 may attribute to the hydrothermal method and its unique nanostructure. The results show that Na0.5Bi0.5TiO3 nanospheres have promising application prospects in the construction of high response humidity sensors.