Palladium-functionalized Nanostructured Platforms for Enhanced Hydrogen Sensing
This paper reports on miniaturized hydrogen sensing platforms, exploring several means of fabricating nano‐ structured films and evaluating their sensing characteris‐ tics. Palladium-sputtered nanoporous organosilicate matrices are fabricated using the polymeric system [poly‐ methylsilsesquioxane (P...
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doaj-c4192765a4ad493cbc159637edb9ad662020-11-25T03:19:58ZengSAGE PublishingNanomaterials and Nanotechnology1847-98042016-06-01640http://dx.doi.org/10.5772/6398751251Palladium-functionalized Nanostructured Platforms for Enhanced Hydrogen SensingAnkur GuptaShubhra GangopadhyayKeshab GangopadhyayShantanu BhattacharyaThis paper reports on miniaturized hydrogen sensing platforms, exploring several means of fabricating nano‐ structured films and evaluating their sensing characteris‐ tics. Palladium-sputtered nanoporous organosilicate matrices are fabricated using the polymeric system [poly‐ methylsilsesquioxane (PMSSQ); polypropylene glycol (PPG); propylene glycol methyl ether acetate (PGMEA)] followed by volatilization of the liquid phase, i.e., PGMEA and PPG at their boiling points. In order to provide greater adsorption/desorption sites for the test gas, ultra-dense ZnO nano-brushes with very high aspect ratios are suc‐ cessfully fabricated in the porous template. Thereafter, functionalization of ZnO is performed by sputter coating thin Pd films onto the ZnO surface. Intensive characteriza‐ tion for these nanostructures is performed using FESEM, EDAX, FTIR, TEM and AFM techniques. Comparison of all fabricated sensing platforms for hydrogen gas-dependent responses based on temperature, as well as test gas concentrations at various ppm levels, is performed. Palladium coating of ZnO nano-brushes renders this film highly selective to hydrogen and also improves its sensi‐ tivity by a factor of ~66% relative to the uncoated film. Sensitivity to hydrogen is found to be ~70% and a selectivity test is performed with CO2 and CH4, with sensitivities of 5% and 7%, respectively. Pd-functionalized ZnO nano-brushes display enhanced hydrogen response behaviour.http://www.intechopen.com/journals/nanomaterials_and_nanotechnology/palladium-functionalized-nanostructured-platforms-for-enhanced-hydrogen-sensingPorous FilmPalladiumZinc Oxide (Zno)Hydrogen Sensing |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Ankur Gupta Shubhra Gangopadhyay Keshab Gangopadhyay Shantanu Bhattacharya |
spellingShingle |
Ankur Gupta Shubhra Gangopadhyay Keshab Gangopadhyay Shantanu Bhattacharya Palladium-functionalized Nanostructured Platforms for Enhanced Hydrogen Sensing Nanomaterials and Nanotechnology Porous Film Palladium Zinc Oxide (Zno) Hydrogen Sensing |
author_facet |
Ankur Gupta Shubhra Gangopadhyay Keshab Gangopadhyay Shantanu Bhattacharya |
author_sort |
Ankur Gupta |
title |
Palladium-functionalized Nanostructured Platforms for Enhanced Hydrogen Sensing |
title_short |
Palladium-functionalized Nanostructured Platforms for Enhanced Hydrogen Sensing |
title_full |
Palladium-functionalized Nanostructured Platforms for Enhanced Hydrogen Sensing |
title_fullStr |
Palladium-functionalized Nanostructured Platforms for Enhanced Hydrogen Sensing |
title_full_unstemmed |
Palladium-functionalized Nanostructured Platforms for Enhanced Hydrogen Sensing |
title_sort |
palladium-functionalized nanostructured platforms for enhanced hydrogen sensing |
publisher |
SAGE Publishing |
series |
Nanomaterials and Nanotechnology |
issn |
1847-9804 |
publishDate |
2016-06-01 |
description |
This paper reports on miniaturized hydrogen sensing platforms, exploring several means of fabricating nano‐ structured films and evaluating their sensing characteris‐ tics. Palladium-sputtered nanoporous organosilicate matrices are fabricated using the polymeric system [poly‐ methylsilsesquioxane (PMSSQ); polypropylene glycol (PPG); propylene glycol methyl ether acetate (PGMEA)] followed by volatilization of the liquid phase, i.e., PGMEA and PPG at their boiling points. In order to provide greater adsorption/desorption sites for the test gas, ultra-dense ZnO nano-brushes with very high aspect ratios are suc‐ cessfully fabricated in the porous template. Thereafter, functionalization of ZnO is performed by sputter coating thin Pd films onto the ZnO surface. Intensive characteriza‐ tion for these nanostructures is performed using FESEM, EDAX, FTIR, TEM and AFM techniques. Comparison of all fabricated sensing platforms for hydrogen gas-dependent responses based on temperature, as well as test gas concentrations at various ppm levels, is performed. Palladium coating of ZnO nano-brushes renders this film highly selective to hydrogen and also improves its sensi‐ tivity by a factor of ~66% relative to the uncoated film. Sensitivity to hydrogen is found to be ~70% and a selectivity test is performed with CO2 and CH4, with sensitivities of 5% and 7%, respectively. Pd-functionalized ZnO nano-brushes display enhanced hydrogen response behaviour. |
topic |
Porous Film Palladium Zinc Oxide (Zno) Hydrogen Sensing |
url |
http://www.intechopen.com/journals/nanomaterials_and_nanotechnology/palladium-functionalized-nanostructured-platforms-for-enhanced-hydrogen-sensing |
work_keys_str_mv |
AT ankurgupta palladiumfunctionalizednanostructuredplatformsforenhancedhydrogensensing AT shubhragangopadhyay palladiumfunctionalizednanostructuredplatformsforenhancedhydrogensensing AT keshabgangopadhyay palladiumfunctionalizednanostructuredplatformsforenhancedhydrogensensing AT shantanubhattacharya palladiumfunctionalizednanostructuredplatformsforenhancedhydrogensensing |
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1724619970010152960 |