Hits:

Indexed by:期刊论文

Date of Publication:2008-09-25

Journal:SENSORS AND ACTUATORS B-CHEMICAL

Included Journals:SCIE、EI、Scopus

Volume:134

Issue:2

Page Number:1010-1015

ISSN No.:0925-4005

Key Words:Gas sensor; Formaldehyde; Enrichment; SnO2; MWCNTs

Abstract: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.