Patima Nizamidin, Abliz Yimit and Ji De Wang Pages 557 - 561 ( 5 )
Silver doped LiFePO4 powder was synthesized using the hydrothermal method, and was used as a sensing material. An Optical WaveGuide (OWG) sensor which reacted to Volatile Organic Compound (VOC) was developed by spin-coating a thin film of LiFe0.99Ag0.01PO4 onto a Tin-diffused glass optical waveguide. This OWG sensor was used to detect formaldehyde gas as a typical example of VOCs. The experimental result showed that the sensor easily and repeatedly detected 100ppt of formaldehyde, with a short response time (less than 2 s). At the low concentration (below 10ppm), the volatile organic compounds caused no interference with the detection of formaldehyde vapor. The sensor also had the characteristics of high sensitivity, a simple structure, and easy fabrication.
Formaldehyde, Gas detection, LiFe0.99Ag0.01PO4 thin film, Optical waveguide gas sensor, Output light intensity, Refractive index, Thickness, Transmittance
College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, P.R. China.