Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 5, Issue 9, Pages 7912-7919Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.7b01448
Keywords
Ru nanoparticles; Catalytic activity; H2S detection; Colorimetric assay; Paper strips
Categories
Funding
- National Natural Science Foundation of China [21403090]
- China Postdoctoral Science Foundation [2015M570405, 2016T90417]
- foundation of Key Lab of Synthetic and Biological Colloids
- Ministry of Education
- Jiangnan University [JDSJ2015-08, JDSJ2016-01]
- 111 Project [B13025]
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Nanocatalysts depended colorimetric assay possesses the advantage of fast detection and provides a novel avenue for the detection of hydrogen sulfide (H2S). The exploration of nanocatalysts with superior catalytic activity is challenging to achieve ultrasensitive colorimetric assay of H2S. Herein, 1.7 +/- 0.2 nm ruthenium nanoparticles (Ru NPs) were prepared and exhibited outstanding catalytic hydrogenation activity. The degradation rate constants of orange I in the presence of Ru NPs were 4-, 47- and 16S-fold higher than those of platinum (Pt) NPs, iridium (Ir) NPs and control groups without catalysts. H2S-induced deactivation of Ru NP catalysts was designed for the sensitive colorimetric assay of H2S, attributing to the poor thiotolerance of Ru NPs. A standard linear curve between the rate constants and the concentration of H2S was established. The limit of detection (LOD) was as low as 0.6 nM. A Ru NPs based colorimetric principle was also used to fabricate colorimetric paper strips for the on-site visual analysis of H2S. The proposed approach shows potential prospective for the preparation of highly selective colorimetric NP sensors for specific purposes.
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