作者
Silvia Chowdhury, Nagy L Torad, Aditya Ashok, Gilang Gumilar, Watcharop Chaikittisilp, Ruijing Xin, Ping Cheng, Md Ikram Ul Hoque, Md Abdul Wahab, Mohammad Rezaul Karim, Brian Yuliarto, Md Shahriar Hossain, Yusuke Yamauchi, Yusuf Valentino Kaneti
发表日期
2022/12/15
期刊
Chemical Engineering Journal
卷号
450
页码范围
138065
出版商
Elsevier
简介
This work reports the template- and etching-free fabrication of hollow bimetallic nickel-cobalt benzenetricarboxylic acid (Ni-Co BTC) hexagonal nanoplates by a polyvinylpyrrolidone (PVP)-assisted approach. The incorporation of PVP can reduce the stacking of these nanoplates along the vertical direction and generate depletion forces between them to reduce aggregation. When employed for the quartz crystal microbalance (QCM) sensing of ammonia (NH3), the hollow Ni-Co BTC hexagonal nanoplates exhibit 1.6, 3.8, and 7.5 times higher sensitivity to 69.5 ppm of NH3 than non-hollow Ni-Co BTC nanoplates, Ni-BTC nanobelts, and Co-BTC microrods, respectively, and a low limit of detection (LOD) of 1.53 ppm. Additionally, they show good selectivity to NH3 in the presence of other interfering compounds and excellent stability with only a very small decrease of 2.86 % in sensitivity after 6 months. The NH3 …
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