Metal-organic frameworks derived tin-doped cobalt oxide yolk-shell nanostructures and their gas sensing properties

Lanlan Guo; Fang Chen; Ning Xie; Chong Wang; Xueying Kou; Yanfeng Sun; Jian Ma; Xishuang Liang; Yuan Gao; Geyu Lu

doi:10.1016/j.jcis.2018.05.089

Metal-organic frameworks derived tin-doped cobalt oxide yolk-shell nanostructures and their gas sensing properties

J Colloid Interface Sci. 2018 Oct 15:528:53-62. doi: 10.1016/j.jcis.2018.05.089. Epub 2018 May 24.

Authors

Lanlan Guo¹, Fang Chen¹, Ning Xie¹, Chong Wang¹, Xueying Kou¹, Yanfeng Sun², Jian Ma¹, Xishuang Liang¹, Yuan Gao¹, Geyu Lu³

Affiliations

¹ State Key Laboratory on Integrated Optoelectronics, Key Laboratory of Gas Sensors, Jilin Province and College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People's Republic of China.
² State Key Laboratory on Integrated Optoelectronics, Key Laboratory of Gas Sensors, Jilin Province and College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People's Republic of China. Electronic address: syf@jlu.edu.cn.
³ State Key Laboratory on Integrated Optoelectronics, Key Laboratory of Gas Sensors, Jilin Province and College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People's Republic of China. Electronic address: lugy@jlu.edu.cn.

PMID: 29807356
DOI: 10.1016/j.jcis.2018.05.089

Abstract

Yolk-shell nanomaterials with controlled morphology have received great attention because of their promising applications in gas sensing. Here, we reported the facile synthesis of pure and 1-5 mol% Sn doped Co₃O₄ yolk-shell nanostructures by calcinating the Co based metal-organic framework (MOF, ZIF-67) prepared from hydrothermal method. The morphologies of the as-obtained samples were characterized by various experimental techniques. Furthermore, the gas sensing properties were systematically measured. Gas sensors based on 3 mol% Sn doped Co₃O₄ yolk-shell nanostructures exhibited extremely enhanced response to ethanol at 200 °C (R_g/R_a = 13.4-100 ppm at 200 °C) and low detection limit (R_g/R_a = 1.3-1 ppm ethanol at 200 °C). Most importantly, the gas response to 100 ppm ethanol is still maintained well after continuous measurement for 20 days.

Keywords: Ethanol; Metal-organic framework; Sn doped Co(3)O(4); Yolk-shell; ZIF-67.