High-Performance Nanowire Hydrogen Sensors by Exploiting the Synergistic Effect of Pd Nanoparticles and Metal–Organic Framework Membranes

• DOI: 10.1021/acsami.8b12569
• Publication Date: 2018-09-18T11:24:58Z
• Authors: Matthieu Weber; Jae-Hun Kim; Jae-Hyoung Lee; Jin-Young Kim; Igor Iatsunskyi; Emerson Coy; Martin Drobek; Anne Julbe; Mikhael Bechelany; Sang Sub Kim
• Keywords: Hydrogen sensor

Herein, we report the fabrication of hydrogen gas sensors with enhanced sensitivity and excellent selectivity. The sensor device is based on strategic combination ZnO nanowires (NWs) decorated palladium nanoparticles (Pd NPs) a molecular sieve metal-organic framework (MOF) nanomembrane (ZIF-8). Pd NPs permit to reach maximal signal responses, whereas ZIF-8 overcoat enables for an Three steps were employed fabrication: (i) coating miniaturized vapor-grown NWs, (ii) decoration these NWs by atomic layer deposition, (iii) partial solvothermal conversion tuned surface nanomembrane. microstructure composition investigations ZIF-8/Pd/ZnO nanostructured materials confirmed presence both metallic uniform thin membrane layer. integration nanomaterials within enabled assessment their performance H2 detection at concentrations as low 10 ppm in various gases such C6H6, C7H8, C2H5OH, CH3COCH3. Remarkably high-response signals 3.2, 4.7, 6.7 ( Ra/ Rg) have been measured only 10, 30, 50 ppm, no noticeable response toward other tested was detected, thus confirming selectivity obtained design. results showed that can be greatly increased addition use coating, acting membrane. Furthermore, presented strategy could extended sensing species judicious choice MOF properties specific molecule detection, opening new avenue preparation highly selective devices.