Tin Dioxide–Carbon Heterostructures Applied to Gas Sensing: Structure-Dependent Properties and General Sensing Mechanism | Zendy

Catherine Marichy | Zendy; Patrícia A. Russo | Zendy; Mariangela Latino | Zendy; JeanPhilippe Tessonnier | Zendy; MarcGeorg Willinger | Zendy; Nicola Donato | Zendy; G. Neri | Zendy; Nicola Pinna | Zendy

Open Access

Tin Dioxide–Carbon Heterostructures Applied to Gas Sensing: Structure-Dependent Properties and General Sensing Mechanism

Author(s) -

Catherine Marichy,

Patrícia A. Russo,

Mariangela Latino,

JeanPhilippe Tessonnier,

MarcGeorg Willinger,

Nicola Donato,

G. Neri,

Nicola Pinna

Publication year - 2013

Publication title -

the journal of physical chemistry c

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.401

H-Index - 289

eISSN - 1932-7455

pISSN - 1932-7447

DOI - 10.1021/jp406191x

Subject(s) - graphene , materials science , heterojunction , tin dioxide , oxide , nanotechnology , tin oxide , coating , carbon nanotube , carbon fibers , atomic layer deposition , conformal coating , tin , chemical engineering , thin film , composite number , composite material , optoelectronics , metallurgy , engineering

Carbon materials such as carbon nanotubes (CNTs), graphene and reduced graphene oxide (RGO) exhibit unique electrical properties, which are also influenced by the surrounding atmosphere. They are therefore promising new sensing materials. Despite the existence of studies reporting gas sensing properties of metal oxide (MO_x) coated nanostructured carbon, an incomplete understanding of their sensing mechanism remains. Here we report a systematic study on the preparation, characterization and sensing properties of CNT and RGO composites with SnO₂ coating. Atomic layer deposition (ALD) was applied to the conformal coating of the inner and outer walls of CNTs with thin films of SnO₂ of various thicknesses, while nonaqueous sol-gel chemistry assisted by microwave heating was used to deposit tin dioxide onto RGO in one step. The sensing properties towards NO₂ target gas of SnO₂/CNTs and SnO₂/RGO heterostructures were investigated as a function of the morphology and density of the metal oxide coating. The general sensing mechanism of carbon based heterostructures and the role of the various junctions involved are established

The content you want is available to Zendy users.

Already have an account? Click here to sign in.

Having issues? You can contact us here

Accelerating Research