High-Temperature resistant ethanol sensing enhanced by ZnO Nanoparticles/SiC nanowire heterojunctions

被引：6

作者：

Huang, Haili ^{[1
,2
]}

Du, Zhentao ^{[1
]}

Wu, Hung-Chun ^{[2
]}

Gao, Fengmei ^{[2
]}

Jiang, Lan ^{[2
]}

Hou, Huilin ^{[2
]}

Chen, Shanliang ^{[2
]}

Li, Weijun ^{[2
]}

Hu, Feng ^{[2
]}

Yang, Weiyou ^{[2
]}

Zhang, Dongdong ^{[2
]}

Wang, Lin ^{[2
,3
]}

机构：

[1] Guangxi Univ, Sch Resources Environm & Mat, State Key Lab Featured Met Mat & Life cycle Safety, Nanning 530004, Peoples R China

[2] Ningbo Univ Technol, Inst Micro Nano Mat & Devices, Ningbo 315211, Peoples R China

[3] Tianjin Univ, Zhejiang Inst, Ningbo 315201, Zhejiang, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2024年 / 645卷

基金：

中国国家自然科学基金;

关键词：

Silicon carbon (SiC); Zinc oxide (ZnO); High-temperature; Heterojunctions; Gas sensor; SILICON-CARBIDE; GAS SENSOR; PERFORMANCE; GROWTH; DEHYDROGENATION; NANOSHEETS; FILMS;

D O I：

10.1016/j.apsusc.2023.158828

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：

Metal-oxide (MO) semiconductors are important materials for developing sensors to detect toxic gases and chemicals. However, achieving robust thermal and chemical stability under harsh working conditions, such as high temperatures, remains a significant challenge. Here, we present the construction of a high-temperature resistant ethanol sensor based on rationally designed heterojunctions formed by ZnO nanoparticles and beta-SiC single-crystalline nanowires (ZnO-NPs/beta-SiC-NWs). The formation of ZnO-NPs/beta-SiC-NWs heterojunctions is achieved through a simple hydrothermal process, allowing the anchoring of ZnO NPs on the surface of SiC NWs. As a result, the assembled sensor demonstrates significantly improved performance in sensing ethanol at 465 degrees C. It exhibits a high response (S = 25.4 at 100 ppm), compared to pure ZnO NPs (10.4) and beta-SiC NWs (1.2), along with fast detection (response/recovery time = 19/49 s), excellent selectivity, and a detection limit down to ppb levels. The archived response value surpasses the previously reported MO-based analogues at the similar tem-peratures and suggests promising applications for stable sensors operating under harsh working conditions.

引用

页数：10

共 63 条

[21] Facile Synthesis of Highly Dispersed Co3O4 Nanoparticles on Expanded, Thin Black Phosphorus for a ppb-Level NOx Gas Sensor [J].