Single-walled carbon nanotubes filled with sulfur and phosphorus compounds for real-time detection of NO2 in air

被引：3

作者：

Sysoev, Vitalii I. ^{[1
]}

Sedelnikova, Olga, V ^{[1
]}

Vorfolomeeva, Anna A. ^{[1
]}

Geraseva, Tatyana A. ^{[1
]}

Bulusheva, Lyubov G. ^{[1
]}

Okotrub, Alexander, V

机构：

[1] Russian Acad Sci, Nikolaev Inst Inorgan Chem, Siberian Branch, 3 Acad Lavrentiev Ave, Novosibirsk 630090, Russia

来源：

CARBON | 2025年 / 233卷

基金：

俄罗斯科学基金会;

关键词：

Gas sensor; Nitrogen dioxide; Single-walled carbon nanotubes; Filling; Phosphorus; Sulfur; GAS; FUNCTIONALIZATION; ENCAPSULATION; SENSITIVITY; ADSORPTION; MOLECULES; SENSORS; SILVER; NH3;

D O I：

10.1016/j.carbon.2024.119915

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Filling cavities in single-walled carbon nanotubes (SWCNTs) opens up additional opportunities for modifying their surface physicochemical properties. Here, we use a vaporization-condensation method to encapsulate individual phosphorus and sulfur and their mixtures and study the effect of filler composition on the gas sensor properties of SWCNTs with respect to nitrogen dioxide exposure. The introduction of a filler leads to significant improvement in the sensor's response to low concentrations of nitrogen dioxide in the air by enhancing charge transfer, reducing the number of adsorption sites inside the bundles/nanotubes, and lowering the adsorption energy. Sensors based on filled SWCNTs exhibit a calculated detection limit of 2-7 ppb NO2 at a response time of less than 1 min, long-term stability of more than one year, and exceptional selectivity to NO2.

引用

页数：11

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