Porous corundum-type In₂O₃ nanoflowers: controllable synthesis, enhanced ethanol-sensing properties and response mechanism

Abstract

Porous rhombohedral In2O3 (corundum-type In2O3, rh-In2O3) with a morphology of uniform nanoflowers was fabricated by using a mild, facile solvent-thermal method.

Highly enhanced NO2 sensing performances of Cu-doped In2O3 hierarchical flowers

“…A c c e p t e d M a n u s c r i p t 4 candidate for the effective detection of NO 2 , O 3 , C 2 H 5 OH, and so on [20][21][22][23][24]. Despite exciting achievements have been accomplished, the developments of higher response, lower detection limit and marked selective gas sensors based on In 2 O 3 microstructures are all still highly desirable and challenging to attain.…”

Solvothermal Synthesis of InOOH Nanospheres with Enhanced Photocatalytic Activity

“…For example, Gao et al . successfully fabricated porous In 2 O 3 nanoflowers by annealing the flower‐like InOOH precursor at 500 °C . Song and Zhang reported the synthesis of In 2 O 3 hierarchical microstructures by annealing the InOOH precursor at different calcination temperatures .…”

Surface chemistry and stability of metastable corundum-type In2O3

“…16,17 Studies of the surface chemistry of In 2 O 3 polymorphs are also needed for understanding the mechanism of gas detection with indium oxide applied as a chemiresistive gas sensor. [18][19][20][21] As for the latter, many oxides exhibit excellent sensing properties for various gases. To explain the sensing behavior, a profound knowledge about the interplay between chemistry and conduction properties is required.…”

“…Increasingly, also metastable oxide polymorphs (e.g. rhombohedral In 2 O 3 ) [18][19][20][21][22][23] are applied as such sensing materials. In this special case, the situation is further complicated by the possible transformation to thermodynamically more stable modifications during sensor operation.…”