An olive-shaped SnO2 nanocrystal-based low concentration H2S gas sensor with high sensitivity and selectivity

Literature Information

Publication Date 2015-07-08
DOI 10.1039/C5CP02854J
Impact Factor 3.676
Authors

Jun Hu, Junchen Chen, Meiying Ge, Jing Lu, Zhi Yang


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Abstract

Olive-shaped SnO2 nanocrystals were synthesized successfully via a facile hydrothermal route, using tin dichloride hydrate, oxalic acid dihydrate and polyvinylpyrrolidone as reaction precursors, and showed great potential in the large-scale preparation of SnO2 nanocrystals. The prepared SnO2 nanocrystals were characterized using XRD, XPS, SEM, TEM and HRTEM, and showed well-defined olive-shaped tetragonal single-crystals with irregular exposed facets. The growth mechanism of the olive-shaped SnO2 nanocrystals was considered after investigating the experimental conditions and reaction time. Due to the abundant active sites on the irregular surfaces, the gas sensing performance of the prepared SnO2 nanocrystals exhibited great gas sensing properties, including high sensitivity, selectivity and stability towards H2S with a very low detection limit (less than 0.5 ppm), revealing their great potential in commercial applications for H2S gas detection.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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