ZnO-Au@ZIF-8 core-shell nanorod arrays for ppb-level NO2 detection

Mingqi Sun; Mingyuan Wang; Xin Ni; Guiwu Liu; Guanjun Qiao; Shuangying Lei; Mingsong Wang; Ling Bai

doi:10.1039/d3cc06218j

ZnO-Au@ZIF-8 core-shell nanorod arrays for ppb-level NO₂ detection

Chem Commun (Camb). 2024 Feb 20;60(16):2180-2183. doi: 10.1039/d3cc06218j.

Authors

Mingqi Sun¹, Mingyuan Wang², Xin Ni³, Guiwu Liu¹, Guanjun Qiao¹, Shuangying Lei², Mingsong Wang¹, Ling Bai¹

Affiliations

¹ School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu Province 212013, China.
² SEU-FEI Nano-Pico Center, Key Laboratory of MEMS of Ministry of Education, School of Electrical Science and Engineering, Southeast University, Nanjing, Jiangsu Province 210096, China.
³ Department of Gastroenterology, Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu Province 212013, China.

PMID: 38293906
DOI: 10.1039/d3cc06218j

Abstract

ZnO-Au@ZIF-8 core-shell heterostructures were prepared by ZIF-8 encapsulation of sacrificial ZnO-Au nanorods. Because of the catalytic activity of the Au nanoparticles and the sieving effects of the ZIF-8, the ZnO-Au@ZIF-8 heterostructures showed an outstanding response of 1.8 to 5 ppb NO₂, and exhibited higher selectivity, stability, anti-humidity and fast response and recovery properties. The combination of the gas-selective catalytic activity of noble metals with the MOF filter used in this work can be easily extended to synthesize other types of MOS@MOF sensors, opening a new avenue for the detection of hazardous gases.