Acetaldehyde gas sensing using hybrids of reduced graphene oxide(rGO)and transition metal elements,rGO-M(M=oxide/hydroxide of Mn,Fe,Co and Ni)has been investigated.Thin films of GO,rGO and rGO-M on conductive glass we...Acetaldehyde gas sensing using hybrids of reduced graphene oxide(rGO)and transition metal elements,rGO-M(M=oxide/hydroxide of Mn,Fe,Co and Ni)has been investigated.Thin films of GO,rGO and rGO-M on conductive glass were deposited through simple and affordable techniques and characterized using Raman spectroscopy,powder X-ray diffraction patterns,field emission scanning electron microscopy and electrical conductivity measurements.Concentration dependent resistances during the oxidation of acetaldehyde gas in air(10 to 50%)were investigated by using a sensing probe devised from rGO,GO-M and the rGO-M hybrids,of which rGO-Ni exhibited the maximum sensitivity.In rGO-Ni,in combination with rGO the NiOOH precursor can capture electrons(generated from acetaldehyde oxidation)through the holes,while indicating rGO-Ni to be a p-type semiconductor.This report implies the possibility of developing inexpensive graphene based p-type semiconductors for sensing other gases as well.展开更多
基金supported by Innovative Areas“Coordination Programming”(area 2107)from the MEXT,Japan.
文摘Acetaldehyde gas sensing using hybrids of reduced graphene oxide(rGO)and transition metal elements,rGO-M(M=oxide/hydroxide of Mn,Fe,Co and Ni)has been investigated.Thin films of GO,rGO and rGO-M on conductive glass were deposited through simple and affordable techniques and characterized using Raman spectroscopy,powder X-ray diffraction patterns,field emission scanning electron microscopy and electrical conductivity measurements.Concentration dependent resistances during the oxidation of acetaldehyde gas in air(10 to 50%)were investigated by using a sensing probe devised from rGO,GO-M and the rGO-M hybrids,of which rGO-Ni exhibited the maximum sensitivity.In rGO-Ni,in combination with rGO the NiOOH precursor can capture electrons(generated from acetaldehyde oxidation)through the holes,while indicating rGO-Ni to be a p-type semiconductor.This report implies the possibility of developing inexpensive graphene based p-type semiconductors for sensing other gases as well.
