Room temperature pH-dependent ammonia gas sensors using graphene quantum dots

被引：59

作者：

Chen, Wei ^{[1
]}

Li, Fushan ^{[1
]}

Ooi, Poh Choon ^{[1
]}

Ye, Yun ^{[1
]}

Kim, Tae Whan ^{[2
]}

Guo, Tailiang ^{[1
]}

机构：

[1] Fuzhou Univ, Inst Optoelect Technol, Fuzhou 350002, Peoples R China

[2] Hanyang Univ, Dept Elect Engn, Seoul 133791, South Korea

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2016年 / 222卷

基金：

中国国家自然科学基金; 新加坡国家研究基金会;

关键词：

Graphene quantum dots; MWCNTs; Ammonia gas sensor; NH3; GAS; OXIDE;

D O I：

10.1016/j.snb.2015.09.002

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

We report a simple solution-process route to realize ammonia (NH3) gas sensor based on graphene quantum dots (GQDs). Transmission electron microscopy analysis confirmed that the 8-10nm GQDs were formed from multi-walled carbon nanotubes by using ultrasonication treatment. The as-fabricated gas sensor showed promising selectivity response when expose to NH3 ambient at room temperature. It is indicated that by adjusting the pH value of the aqueous GQDs in acidic and neutral, two types of gas sensors with contrary current responses could be obtained, which might be resulted from quantum confinement, edge effects and presence of functional groups on GQDs. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：763 / 768

页数：6

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