The surface chemical composition effect of a polyacrylic acid/polyvinyl alcohol nanofiber/quartz crystal microbalance sensor on ammonia sensing behavior

被引：24

作者：

Hu, Ying ^{[1
,3
]}

Yu, Hui ^{[2
]}

Yan, Zhiyong ^{[3
]}

Ke, Qinfei ^{[1
]}

机构：

[1] Donghua Univ, Engn Res Ctr Tech Text, Shanghai 201620, Peoples R China

[2] Wuyi Univ, Sch Text Mat & Engn, Engn Technol Res Ctr Funct Text Higher Educ Guang, Jiangmen 529020, Peoples R China

[3] Jiaxing Univ, Jiaxing 314001, Peoples R China

来源：

RSC ADVANCES | 2018年 / 8卷 / 16期

关键词：

ELECTROSPUN POLYMER NANOFIBERS; GAS SENSOR; BIMETALLIC NANOPARTICLES; CHEMIRESISTIVE SENSORS; POLYPYRROLE; SENSITIVITY; FABRICATION; NANOTUBES; MEMBRANES; MATS;

D O I：

10.1039/c7ra13006f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Polyacrylic acid (PAA)/polyvinyl alcohol (PVA)-based quartz crystal microbalance (QCM) ammonia sensors were fabricated by depositing composite PAA/PVA nanofibrous substrates onto QCM gold electrodes. Morphological analysis of the PAA/PVA substrates revealed a homogenous smooth surface and similar specific surface areas. X-ray photoelectron spectroscopy results indicated their distinct chemical properties with different carboxyl group contents on the surface. The ammonia sensing tests demonstrated the significant effect of the surface chemical characteristics on ammonia-sensing sensitivity, and the sensing process was proven to be derive from a monolayer adsorption mechanism. Because of the inherent high specific surface areas (SSAs) and three-dimensional porous architecture, the prepared PAA/PVA nanofiber-based QCM sensors exhibited ultrahigh sensitivity (100 ppb) and rapid response (several seconds) with good selectivity and repeatability in terms of ammonia detection.

引用

页码：8747 / 8754

页数：8

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