文献类型：期刊文献

英文题名：ZIF-67-derived NiCo2O4/NiO hollow nanocages decorated with Ag nanoparticles for humidity tolerance and high sensitivity n-butanol sensing

作者：Li, Xuan[1];Cao, Yuyan[1];Shen, Yihui[1];Wu, Yulin[1];Cui, Shicong[3];Cheng, Lingli[1];Yang, Xuechun[2];Jiao, Zheng[2]

机构：[1]Shanghai Univ, Sch Environm & Chem Engn, Shanghai 200444, Peoples R China;[2]Shanghai Univ, Digital Med Res Inst, Sch Med, Shanghai 200444, Peoples R China;[3]East China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China

年份：2025

卷号：727

外文期刊名：COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS

收录：;EI(收录号：20253519080203);WOS:【SCI-EXPANDED(收录号:WOS:001566812700004)】；

基金：This research was funded by the soft science project of Shanghai Science and Technology Commission (No. 24692115200) , 2024-2025 Research Project under the Open Competition Mechanism, School of Medicine, Shanghai University, Shanghai 200444, China (No. SHU-UM-JBGS-2025-11) , Tianjin Science and Technology Program Project (No. 24YFZCSN00100) , the National Natural Science Foundation of China (No. 12304467) , and the China Postdoctoral Science Foundation (No. 2023M732175) . In addition, we also appreciate the High Performance Computing Center of Shanghai University, and Shanghai Engineering Research Center of Intelligent Computing System (No. 19DZ2252600) for supplying computational facilities and technical assistance.

语种：英文

外文关键词：Mesoporous hollow nanocages; P-p heterojunction; Humidity tolerance; N-butanol gas sensor

摘要：Nowadays, designing sensing materials possessing both high sensitivity and humidity resistance is still a challenge in the field of sensing materials. In this work, a ternary Ag nanoparticles decorated NiCo2O4/NiO (Ag/ NiCo2O4/NiO) composite with hollow nanocage structure has been successfully obtained, which uses ZIF-67 as a template combined with self-etching method, followed by NaBH4 reduction of silver ions. For the synergistic effect of the novel morphology, the presence of Ag nanoparticles and hydroxyl absorbent NiO, and the formation of p-p heterojunction between NiCo2O4 and NiO, Ag/NiCo2O4/NiO exhibits good humidity resistance and highsensitive to n-butanol. The mesoporous hollow nanocage morphology not only provides abundant adsorption sites for target gases, but also facilitates the diffusion of water molecules. The doping of Ag nanoparticles can regulate the adsorption of oxygen on the surface of gas sensing materials, improving the sensitivity while suppressing the hydroxyl poisoning reaction process. The hydroxyl absorbent NiO in Ag/NiCo2O4/NiO can both directly absorb water and form p-p heterojunction structure with NiCo2O4, which improves sensor performance while suppressing hydroxyl poisoning. In the gas sensing tests, the optimal Ag/NiCo2O4/NiO composites can achieve a high response value of 31.41, as well as rapid response/recovery times (65 s/47 s) to 100 ppm n butanol at the working temperature of 170 degrees C. Moreover, it displays a wide detection range (1-120 ppm), a low detection limit (0.27 ppm), excellent selectivity to n-butanol, and superior long term stability (maintaining a response value of 84.68 % after 14 days). Notably, the optimal Ag/NiCo2O4/NiO demonstrates great humiditytolerant ability with a response values fluctuation of 16 % under the range of 33 %-80 % relative humidity. This research provides a feasible approach for designing practical gas sensing materials with high sensitivity and moisture resistance.