LI Jinan,YAN Shihang,LI Gen,WANG Ya,XU Hongyan,DUAN Guangbin

(School of Materials Science and Engineering,University of Jinan,Jinan 250022,China)

Abstract：In order to quickly and accurately detect NO₂ as a harmful gas,a hydrothermal method for synthesizing zeolitic imidazolate frameworks-8 material composite In₂O₃ nanorods (ZIF-8@In₂O₃)and preparing the gas sensor was reported.The morphology and structure of ZIF-8@In₂O₃ were characterized by scanning electron microscope,transmission electron microscope and specific surface analysis,and the gas-sensing performance of these materials were tested.The results show that ZIF-8@In₂O₃ nanorods with core-shell structure have been successfully synthesized.At the optimum operating temperature of 220 ℃,compared with 223 of the sensitivity of pure In₂O₃ to 5×10^-5 of NO₂,the sensitivity of ZIF-8@In₂O₃ reaches 254.Under the condition of triethylamine (TEA) as the interference gas,the selectivity of 5.81 of ZIF-8@In₂O₃ is greatly improved than 3.69 of pure In₂O₃,and it also has good moisture resistance.

Keywords：indium oxide;zeolite imidazole ester framework material;nanorods;hydrothermal synthesis;gas sensing

Get Citation: LI J N,YAN S H,LI G,et al.Synthesis of core-shell ZIF-8@In₂O₃ nanorods and enhancement of selectivity to NO₂[J].China Powder Science and Technology,2023,29(3)：101-109.

Received： 2023-02-01,Revised：2023-03-17,Online：2023-04-21 10:46。

Funding Project：国家自然科学基金项目,编号：62171199。

First Author：李继男(1998—),男,硕士研究生,研究方向为气敏传感器。E-mail：15106322014@163.com。

Corresponding Author：

徐红燕(1976—),女,教授,博士,硕士生导师,研究方向为半导体材料与器件。E-mail：mse_xuhy@ujn.edu.cn。

段广彬(1983—),男,教授,博士,硕士生导师,研究方向为新能源工程。E-mail：mse_duangb@ujn.edu.cn。