Simple post-synthesis of mesoporous p-type Co^sub 3^O^sub 4^ nanochains for enhanced H^sub 2^S gas sensing performance

In this paper, cobalt carbonate hydroxide (Co(CO3)0.5(OH)..11H2O) nanowires were successfully fabricated by a simple hydrothermal route without using surfactants and by subsequent heat treatment in air at 600 °C for 5 h to obtain mesoporous Co3O4 nanochains. As-synthesized nanochains with length of...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2018-10, Vol.B270, p.158
Main Authors: Quang, Pham Long, Cuong, Nguyen Duc, Hoa, Tran Thai, Long, Hoang Thai, Hung, Chu Manh, Le, Dang Thi Thanh, Hieu, Nguyen Van
Format: Article
Language:English
Subjects:
Ammonia
Chemical synthesis
Cobalt oxides
Flammability
Flammable gases
Gas sensors
Heat treating
Heat treatment
Hydrogen sulfide
Micrometers
Nanoparticles
Nanowires
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Summary:In this paper, cobalt carbonate hydroxide (Co(CO3)0.5(OH)..11H2O) nanowires were successfully fabricated by a simple hydrothermal route without using surfactants and by subsequent heat treatment in air at 600 °C for 5 h to obtain mesoporous Co3O4 nanochains. As-synthesized nanochains with length of several micrometers consisted of well-linked Co3O4 nanoparticles with an average size of 50 nm. The sensor based on mesoporous Co3O4 nanochains was used to detect flammable and toxic gases, including H2S, NH3, CO, and H2. Results showed potential of mesoporous Co3O4 nanochains as sensor material for detection of hydrogen sulfides at low concentration with rapid response.
ISSN:0925-4005
1873-3077