生物污染
亚硝酸盐
共价键
多孔性
基质(化学分析)
化学
化学工程
联轴节(管道)
导电体
相变
材料科学
膜
色谱法
硝酸盐
复合材料
有机化学
生物化学
物理
量子力学
工程类
作者
Zhenhao Wang,Yu Wang,Yu Zhang,Ben Zhang,Mingyuan Li,Xi Jin,Tao Yang,Guozhe Meng
标识
DOI:10.1016/j.jhazmat.2024.134492
摘要
Nitrite plays a critical role in a variety of nitrification and denitrification processes in the nitrogen cycle. Due to the high surface energy, tendency to aggregate, and poor conductivity, current nitrite ZnS-based sensing platform could not meet the need of on-site nitrite detection in smart agriculture. In order to address these issues, the carboxylated carbon nanotube (CNT) was introduced to reduce the surface energy and prevented aggregation of ZnS, while ZnS-carboxylated CNT (ZnS-CNT) composite also provided excellent electrochemical conductivity. Furthermore, the introduction of phase transition BSA (PTB) created a three-dimensional porous conductive matrix without interfering with the mass transfer process of nitrite. The resulting sensing platform exhibited a linear detection range of 10 nM to 0.4 mM for nitrite, with a detection limit of 0.73 nM. And this sensing platform had the excellent antifouling ability to direct detection nitrite in real soil suspension. In addition, the sensing platform demonstrated remarkable resistance to interferences from pH variations, microbial presence, and organic pollutants that usually present in soil environment. Therefore, on-site detection of nitrite ions in soil environment was realized no needing complex pretreatments.
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