Journal
RSC ADVANCES
Volume 5, Issue 92, Pages 75098-75104Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra13459e
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Funding
- National Natural Science Foundation of China [U1201241, 11375020, 51431001, 21321001]
- Sharp Laboratory of China CO., LTD.
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A light activated miniature formaldehyde sensor working at room temperature is fabricated by CdSO4 modified ZnO nanoparticles. The CdSO4 is deposited on the surface of the ZnO nanoparticles as a separated phase rather than doping into the lattice of ZnO. The Cd2+ and SO42- on the surface play a synergic effect for the high sensitivity to formaldehyde. The sensor shows high sensitivity to formaldehyde, with detection limit lower than 1 ppm while shows no response to ethanol and very weak response to acetone. With engineering efforts, a highly compact prototype formaldehyde sensor is obtained, which is very convenient for portable formaldehyde specific detection.
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