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Mesoporous Cobalt Tungsten Oxide Heterostructured Nanotoroids for Gas Sensing
Author(s) -
Nguyen ThanhDinh,
Nguyen Cuong Duc,
Hieu Nguyen Van,
MacLachlan Mark J.
Publication year - 2018
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201800269
Subject(s) - materials science , mesoporous material , cobalt , cobalt oxide , electrocatalyst , oxide , nanomaterials , tungsten , electrochromism , nanotechnology , nanoparticle , heterojunction , ionic bonding , chemical engineering , catalysis , electrode , electrochemistry , optoelectronics , chemistry , organic chemistry , ion , engineering , metallurgy
Mesoporous semiconducting nanotoroids of cobalt and tungsten oxides (CoO/Co 3 O 4 /WO 3 ) are made by a hydrothermal reaction of binary metal ionic precursors with aminocaproic acid. The toroidal organization of the primary nanoparticles into the cobalt tungsten oxide nanorings presents a straightforward, interesting approach for amino acid–induced self‐aggregation of hierarchical metal‐based nanostructures. The semiconducting properties of the as‐prepared nanotoroids are exploited in gas‐sensing experiments with three analytes (CO, H 2 , NH 3 ) to demonstrate the toroids as promising gas sensor components. Toroidal geometry, porosity, and semiconductor p–n heterojunction make the new mesoporous Co‐W oxide nanomaterials attractive as novel functional supports for host–guest chemistry, electrocatalysis, and electrochromism.