Decoration of vertical graphene with tin dioxide nanoparticles for highly sensitive room temperature formaldehyde sensing
Decoration of vertical graphene with tin dioxide nanoparticles for highly sensitive room temperature formaldehyde sensing
复制标题
二氧化锡纳米颗粒装饰垂直石墨烯用于高灵敏室温甲醛传感
DOI：
10.1016/j.snb.2017.10.043
复制
发表时间：
2018-03-01
影响因子：
8.4
通讯作者：
Cen, Kefa
中科院分区：
文献类型：
--
作者：
Bo, Zheng;Yuan, Mu;Cen, Kefa
利用二氧化锡纳米颗粒修饰的垂直石墨烯（VG）网络制备了一种高灵敏度的室温甲醛传感器。采用微波等离子体增强化学气相沉积（MW-PECVD）方法直接在传感器电极上生长VG。采用电化学沉积法将SnO 2纳米粒子稀疏均匀地修饰在VG的侧面和边缘。VG/SnO 2传感器在室温下对低浓度甲醛有很好的响应。VG/SnO 2传感器对甲醛的检测下限为0.02 ppm。对于5 ppm甲醛，响应时间和恢复时间分别为46 s和95 s。该传感器具有良好的选择性和稳定性。基于VG的特殊结构以及VG与SnO 2纳米粒子之间的协同效应，分析了VG具有良好传感性能的机理。(C)2017爱思唯尔B. V.保留所有权利。
A room temperature formaldehyde sensor with high sensitivity is fabricated using vertical graphene (VG) networks decorated with tin dioxide (SnO2) nanoparticles. VG was directly grown on the sensor electrodes using a microwave plasma-enhanced chemical vapor deposition (MW-PECVD) method. SnO2 nanoparticles were decorated on the VG side planes and edges sparsely and evenly with an electrochemical deposition method. The VG/SnO2 sensor exhibited high responses to low-concentration formaldehyde under room temperature. The low limit of detection (LOD) of VG/SnO2 sensor for formaldehyde sensing is 0.02 ppm. The response time and recovery time were 46 s and 95 s for 5 ppm formaldehyde, respectively. Moreover, the sensor showed excellent selectivity and stability. The mechanism responsible for good sensing performance was analyzed based on the special structure of VG and the synergistic effect between VG and the SnO2 nanoparticles. (C) 2017 Elsevier B.V. All rights reserved.