0D/2D CdS/ZnO composite with n-n heterojunction for efficient detection of triethylamine

被引:67
作者
Liu, Jingjing [1 ,3 ]
Zhu, Bicheng [2 ]
Zhang, Liuyang [1 ]
Fan, Jiajie [4 ]
Yu, Jiaguo [1 ,3 ]
机构
[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China
[2] China Univ Geosci, Fac Mat Sci & Chem, Lab Solar Fuel, 388 Lumo Rd, Wuhan 430074, Peoples R China
[3] Guangdong Lab, Foshan Xianhu Lab Adv Energy Sci & Technol, Xianhu Hydrogen Valley 528200, Foshan, Peoples R China
[4] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China
基金
中国国家自然科学基金;
关键词
Triethylamine; Gas sensor; CdS/ZnO; n-n heterojunction; 0D/2D structure; GAS-SENSING PROPERTIES; SURFACE-AREA; NANORODS; SENSOR; RAMAN; PHOTOLUMINESCENCE; PHOTOCATALYST; NANOCOMPOSITE; FABRICATION; NANOSHEETS;
D O I
10.1016/j.jcis.2021.05.082
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
It is imperative to seek for novel materials with pronounced gas sensing performance towards triethylamine for the sake of human health. Herein, we successfully fabricate an outstanding triethylamine sensor based on CdS/ZnO composite with 0D/2D structure, which are prepared by in-situ growth of CdS quantum dots on ultra-thin ZnO nanosheets. The ratios between the two ingredients are adjusted and their effect is evaluated. The optimal sample exhibits the lowest operating temperature of 200 degrees C, the highest response value of similar to 20 and the fastest response time of 2 s. Besides, it also has the virtues of durable stability, excellent selectivity and superior anti-interference ability. The mechanism behind the aforementioned intriguing performance is investigated by X-ray photoelectron spectroscopy, Kelvin probe and density function theory (DFT) simulation. All the results verify that the enhanced gas sensing properties are derived from splendid 0D/2D structure, n-n heterojunction and large specific surface area. Additionally, this study opens an avenue for designing sensors with 0D/2D structure. (C) 2021 Elsevier Inc. All rights reserved.
引用
收藏
页码:898 / 909
页数:12
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