Trimodally porous SnO2 nanospheres with threedimensional interconnectivity and size tunability

A one-pot synthetic route and potential application as an extremely sensitive ethanol detector

Ji Wook Yoon, Seung Ho Choi, Jun Sik Kim, Ho Won Jang, Yun Chan Kang, Jong Heun Lee

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

The rapid and effective transfer of chemical reactants to solid surfaces through porous structures is essential for enhancing the performance of nanomaterials for various energy and environmental applications. In this paper, we report a facile one-pot spray pyrolysis method for preparing highly reactant-accessible and porous SnO2 spheres, which have three-dimensionally interconnected and size-tunable trimodal (microscale, mesoscale and macroscale) pores. For this synthetic method, macroscale polystyrene spheres and mesoscale-diameter, long carbon nanotubes were used as sacrificial templates. The promising potential of the SnO2 spheres with trimodal pores (sizes ∼3, 20 and 100 nm) was demonstrated by the unprecedentedly high response to several p.p.b. levels of ethanol. Such an ultrahigh response to ethanol is explained with respect to the hierarchical porosity and pore-size-dependent gas diffusion mechanism.

Original languageEnglish
Article numbere244
JournalNPG Asia Materials
Volume8
Issue number3
DOIs
Publication statusPublished - 2016 Mar 25

Fingerprint

Nanospheres
Ethanol
ethyl alcohol
routes
Detector
Detectors
porosity
Three-dimensional
Pore size
detectors
Pyrolysis
Carbon Nanotubes
Nanomaterials
Spray pyrolysis
Diffusion in gases
Polystyrenes
Spray
Porosity
Nanotubes
Nanostructured materials

ASJC Scopus subject areas

  • Modelling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Trimodally porous SnO2 nanospheres with threedimensional interconnectivity and size tunability : A one-pot synthetic route and potential application as an extremely sensitive ethanol detector. / Yoon, Ji Wook; Choi, Seung Ho; Kim, Jun Sik; Jang, Ho Won; Kang, Yun Chan; Lee, Jong Heun.

In: NPG Asia Materials, Vol. 8, No. 3, e244, 25.03.2016.

Research output: Contribution to journalArticle

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