Nanostructure characterization and performance evaluation of perovskite sensor composed of multi-elements.
A multi-element perovskite nanoscale film composed of Li(+) cation incorporated into Ca(2+)-doped PbTiO(3) (LCPT) was derived via colloidal chemistry, sol-gel (SG) method followed by heat-treatment. The morphology, chemical composition and structure of the LCPT nanofilms were investigated by advanced instrumentation (microscopy and spectroscopy) techniques. The characterization indicates formation of a tetragonal crystalline ceramic after sintering. The humidity sensing performances of LCPT nanofilms with various formulations were evaluated as a function of lattice distortion. The LCPT sensor doped with Li (0.5-0.1mol%) possessed the distortion of 1.041-1.046 and displayed rapid sensitivity (current changes from 1.5x10(-3) to 5.2A), high linearity (R(2)=0.997) in the whole relative humidity range (phi: 8-93% RH) under low frequency of 100Hz, and excellent long-term stability.
Pan
Xubin
X
Department of Environmental Engineering, Texas A&M University-Kingsville, MSC 213, Kingsville, TX 78363, USA. panadin@hotmail.com
Bashir
Sajid
S
Liang
Gang
G
Liu
Jingbo Louise
JL
D000327:Adsorption; D015374:Biosensing Techniques; D017610:Calcium Compounds / Q000737:chemistry*; D004867:Equipment Design; D008422:Materials Testing; D018625:Microscopy, Atomic Force / Q000379:methods; D046529:Microscopy, Electron, Transmission / Q000379:methods; D053758:Nanoparticles / Q000737:chemistry*; D049329:Nanostructures; D036103:Nanotechnology / Q000379:methods*; D010087:Oxides / Q000737:chemistry*; D013059:Spectrum Analysis, Raman / Q000379:methods; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014025:Titanium / Q000737:chemistry*; D014867:Water / Q000737:chemistry
D017610:Calcium Compounds; D010087:Oxides; D014867:Water; C059910:perovskite; D014025:Titanium