Fabrication and ammonia gas sensing of palladium/polypyrrole nanocomposite

被引：82

作者：

Hong, Lijie ^{[1
]}

Li, Yang ^{[1
]}

Yang, Mujie ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Polymer Sci & Engn, Minist Educ, Key Lab Macromol Synth & Functionalizat, Hangzhou 310027, Zhejiang, Peoples R China

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2010年 / 145卷 / 01期

关键词：

Nanocomposite; Polypyrrole; Palladium; NH3; Gas sensor; WALLED CARBON NANOTUBES; CONDUCTING POLYMERS; PD NANOPARTICLES; SENSORS; COMPOSITE; POLYANILINE; METHANE; FILMS; SENSITIVITY; PERFORMANCE;

D O I：

10.1016/j.snb.2009.11.057

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A nanocomposite of polypyrrole (Ppy) and palladium was fabricated by a facile method involving thermal dynamic refluxing of palladium salt and encapsulation of Pd nanoclusters with Ppy by vapor phase polymerization. The composite film was characterized using transmission electron microscopy and atomic force microscopy. It was found that the morphologies of the composite film were heavily affected by concentration and ratio of the reactants, polymerization time and polymer additives. The nanocomposite showed a response magnitude of 13.9-58.9% towards NH3 gas of 50-2000 ppm at room temperature, which is higher than that of Ppy alone by a factor of two. Moreover, the electrical response was reversible, reproducible and fast, with response and recovery times of 14s and 148s for 1000 ppm NH3, respectively. Gas sensory properties of the nanocomposite greatly depended on the size of Pd nanoparticles and the morphology of the composite film. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：25 / 31

页数：7

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