One-step photochemical deposition of PdAu alloyed nanoparticles on TiO nanowires for ultra-sensitive H detection
Journal of Materials Chemistry A, ISSN: 2050-7496, Vol: 4, Issue: 6, Page: 2236-2245
2016
- 41Citations
- 28Captures
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Article Description
TiO nanostructures are widely used for H detection in scientific and technological research fields, but how to detect ppm-level H in a timely and sensitive manner at room temperature remains challenging. In this work, TiO nanowires were synthesized on a Ti foil substrate via the hydrothermal method, and then decorated with PdAu alloyed nanoparticles (NPs) via a one-step photochemical deposition method. What's more, the Pd/Au atomic ratio in alloyed NPs could be adjusted by just changing the Pd/Au ratio in the precursor solution. H sensing experiments indicate that sensitization with Pd or PdAu alloyed NPs makes TiO nanowire films highly sensitive to ppm-level H at room temperature. The role of Au in alloyed NPs is estimated by comparing the sensing performance of PdAu@TiO with different Pd/Au ratios in alloyed NPs and references (e.g., TiO, Au@TiO and Pd@TiO). The results indicate that the as-synthesized PdAu@TiO with less than 25% Au in alloyed NPs exhibits higher sensitivity and a faster response than Pd@TiO, and plausible enhancement mechanisms of the Au component in alloyed NPs on the performance of PdAu@TiO are also supplied.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84957001585&origin=inward; http://dx.doi.org/10.1039/c5ta06917c; https://xlink.rsc.org/?DOI=C5TA06917C; http://xlink.rsc.org/?DOI=C5TA06917C; http://pubs.rsc.org/en/content/articlepdf/2016/TA/C5TA06917C; https://dx.doi.org/10.1039/c5ta06917c; https://pubs.rsc.org/en/content/articlelanding/2016/ta/c5ta06917c
Royal Society of Chemistry (RSC)
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