Enhanced ammonia sensing performance based on MXene-Ti3C2Tx multilayer nanoflakes functionalized by tungsten trioxide nanoparticles

被引：130

作者：

Guo, Xuezheng ^{[1
,2
]}

Ding, Yanqiao ^{[2
]}

Kuang, Delin ^{[2
]}

Wu, Zhilin ^{[2
]}

Sun, Xia ^{[2
]}

Du, Bingsheng ^{[1
,2
]}

Liang, Chengyao ^{[1
,2
]}

Wu, Yingjie ^{[2
]}

Qu, Weijie ^{[2
]}

Xiong, Lian ^{[2
]}

He, Yong ^{[1
,2
]}

机构：

[1] Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, Peoples R China

[2] Chongqing Univ, Key Lab Optoelect Technol & Syst, Coll Optoelect Engn, Educ Minist China, Chongqing 400044, Peoples R China

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2021年 / 595卷

关键词：

Ammonia sensor; MXene; Tungsten trioxide; Nanocomposite; Ultrasound compounding; NH3; TEMPERATURE; EMISSIONS;

D O I：

10.1016/j.jcis.2021.03.115

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Low-power consumption and high sensitivity are highly desirable for a vast range of NH3 sensing appli-cations. As a new type of two-dimension (2D) material, Ti3C2Tx is extensively studied for room temper-ature NH3 sensors recently. However, the Ti3C2Tx MXene based gas sensors suffer mainly from low sensitivity. Herein, we report a sensitive Ti3C2Tx/WO3 composite resistive sensor for NH3 detection. The Ti3C2Tx/WO3 composite consisting of WO3 nanoparticles anchored on Ti3C2Tx nanoflakes were syn-thesized successfully with a facile ultra-sonication technique. The composite sensor with optimized com-ponents exhibits a high sensitivity of 22.3% for 1 ppm NH3 at room temperature, which is 15.4 times higher than the pure Ti3C2Tx sensor. Furthermore, the composite sensor has excellent reproducibility, good long-term stability, and high selectivity to NH3. The relative humidity influence on NH3 gas sensing properties of the sensors was systematically studied. This research provides an efficient route for the preparation of novel MXene-based sensitive materials for high-performance NH3 sensors. (C) 2021 Elsevier Inc. All rights reserved.

引用

页码：6 / 14

页数：9

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