点击次数：

论文类型：期刊论文

发表时间：2008-09-25

发表刊物：SENSORS AND ACTUATORS B-CHEMICAL

收录刊物：SCIE、EI、Scopus

卷号：134

期号：2

页面范围：1010-1015

ISSN号：0925-4005

关键字：Gas sensor; Formaldehyde; Enrichment; SnO2; MWCNTs

摘要：A semiconductor gas sensor of tin oxide doped with hydroxyl (OH) functionalized multi-wall carbon nanotubes (MWCNTs) was fabricated for detecting indoor formaldehyde concentration. The response of the MWCNTs-doped SnO2 sensor was much higher than that of an undoped SnO2 sensor. In order to detect low concentration formaldehyde, a novel enrichment method utilizing active carbon was applied. The response of the sensor was obviously increased by the application of the enrichment method. The lowest concentration of formaldehyde gas detected by a 5 wt% MWCNTs-doped SnO2 sensor was 0.03 ppm. (C) 2008 Elsevier B.V. All rights reserved.