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Issue 18, 2014
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Enhanced HCHO gas sensing properties by Ag-loaded sunflower-like In2O3 hierarchical nanostructures

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Abstract

Nanoscale Ag-loaded sunflower-like In2O3 hierarchical nanostructures are developed for HCHO detection. Such unique architectures are synthesized by an ambient temperature and pressure hydrolysis reaction combined with a subsequent chemical reduction process. Morphology characterizations confirm that homodisperse nanochains assembled by nanoparticles along the same direction are radially linked to a center to construct sunflower-like hierarchical nanostructures. Novel highly porous and branched structure of the 3D hierarchical architectures and the chemical and electronic sensitization effect of Ag nanoparticles endow Ag-loaded In2O3 nanostructures-based sensors with enhanced gas sensing performances in terms of fast response time (0.9 s), recovery time (14 s), high sensitivity and good sensing selectivity for 20 ppm HCHO. A multistage reaction formation mechanism of the sunflower-like hierarchical nanostructures, and a morphology-dependent sensing mechanism are proposed.

Graphical abstract: Enhanced HCHO gas sensing properties by Ag-loaded sunflower-like In2O3 hierarchical nanostructures

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Publication details

The article was received on 09 Dec 2013, accepted on 10 Feb 2014 and first published on 11 Feb 2014


Article type: Paper
DOI: 10.1039/C3TA15110G
Citation: J. Mater. Chem. A, 2014,2, 6598-6604
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    Enhanced HCHO gas sensing properties by Ag-loaded sunflower-like In2O3 hierarchical nanostructures

    S. Wang, B. Xiao, T. Yang, P. Wang, C. Xiao, Z. Li, R. Zhao and M. Zhang, J. Mater. Chem. A, 2014, 2, 6598
    DOI: 10.1039/C3TA15110G

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