Surface Molecular Separator for Selective Gas Sensing

被引：11

作者：

Choi, Pil Gyu ^{[1
]}

Liu, Zheng ^{[1
]}

Hara, Nobuo ^{[2
]}

Masuda, Yoshitake ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Nagoya, Aichi 4638560, Japan

[2] Natl Inst Adv Ind Sci & Technol, Res Inst Chem Proc Technol, Tsukuba, Ibaraki 3058565, Japan

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2020年 / 59卷 / 40期

基金：

日本科学技术振兴机构;

关键词：

3-DIMENSIONAL VISUALIZATION; IMIDAZOLATE; MEMBRANES; SENSORS; SENSITIVITY; FRAMEWORKS; SCIENCE; FILM; H-2; CO2;

D O I：

10.1021/acs.iecr.0c03395

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A zeolitic imidazolate framework-8 (ZIF-8) layer was introduced as a surface molecular separator to grant the selective gas-sensing ability to thin-film sensor material composed of SnO2 nanosheets. ZIF-8 possesses a molecular sieving ability, which is in the range of approximately 4.0-4.2 angstrom. Compared to a SnO2 nanosheet gas sensor, a ZIF-8/SnO2 nanosheet gas sensor exhibited a decreased sensor signal response when the gas molecular sizes were large, e.g., C3H6 (4.120 angstrom), 1-C4H8 (5.430 angstrom), and C9H18O (12.011 angstrom). However, the ZIF-8/SnO2 nanosheet sensor signal response to smaller-sized gas molecules, such as C2H4 (3.058 angstrom), was slightly increased due to electron transfer at the ZIF-8 and SnO2 interface. Therefore, the control of gas selectivity based on molecular size was realized by introducing ZIF-8 as a surface molecular separator. These results pave the way for selective gas sensing in various types of applications that depend on gas selectivity.

引用

页码：17894 / 17900

页数：7

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