High performance acetone sensor based on ZnO nanorods modified by Au nanoparticles
High performance acetone sensor based on ZnO nanorods modified by Au nanoparticles
复制标题
DOI：
10.1016/j.jallcom.2019.05.101
复制
发表时间：
2019-08
影响因子：
6.2
通讯作者：
Mingjie Yang;Shendan Zhang;Fengdong Qu;Shu Gong;Chenhao Wang;Lei Qiu;Minghui Yang;Wenlong Cheng
中科院分区：
文献类型：
--
作者：
Mingjie Yang;Shendan Zhang;Fengdong Qu;Shu Gong;Chenhao Wang;Lei Qiu;Minghui Yang;Wenlong Cheng
利用Au纳米粒子修饰半导体金属氧化物（SMO）表面是一种简单而有效的改善SMO传感器性能的方法。通过简单的沉淀反应制备了ZnO纳米棒，并通过氨沉积法在ZnO纳米棒表面修饰了催化Au纳米粒子。在172 °C的最佳工作温度下，基于Au纳米颗粒修饰的ZnO纳米棒的传感器对100 ppm丙酮的气体响应提高了6.6倍，这比原始ZnO传感器的219 °C降低了。同时，响应/恢复时间从13 s/29 s缩短到1 s/20 s。另外，这种传感增强机制可以归因于Au纳米颗粒的电子和化学增感效应。
Modification with Au nanoparticles on the surface of semiconductor metal oxide (SMO) is a simple and effective mean to improve the sensing performance of pristine SMO sensor. ZnO nanorods are prepared via a simple precipitation reaction and subsequently modified by catalytic Au nanoparticles with effect on the surface through an ammonia deposition method. The gas response of sensor based on ZnO nanorods modified by Au nanoparticles is improved by 6.6 times to 100 ppm acetone at the optimal operating temperature of 172 °C, which is reduced from 219 °C for pristine ZnO sensor. Meanwhile, the response/recovery time is shortened to 1 s/20 s from 13 s/29 s. In addition, the sensing enhancement mechanism can be attributed to the electronic and chemical sensitization effects of Au nanoparticles.