Highly sensitive formaldehyde gas sensor based on Au nanoparticle functionalized 1D LaFeO3 nanofibers

Microchemical Journal, Journal Year: 2025, Volume and Issue: unknown, P. 113140 - 113140

Published: Feb. 1, 2025

Language: Английский

Study of lanthanum substitution by strontium in lanthanum ferrites for gas-sensitive sensors by total reflection X-ray fluorescence

Industrial laboratory Diagnostics of materials, Journal Year: 2025, Volume and Issue: 91(4), P. 5 - 11

Published: April 25, 2025

An approach for the simultaneous quantification of La, Fe, and Sr in solutions suspensions (La, Sr)FeO 3 composites by TXRF method has been developed to study effect lanthanum substitution with strontium on sensory properties ferrites. A gallium solution a concentration 50 mg/liter was used as an internal standard determination elements. The validity obtained results confirmed sample inductively coupled plasma atomic emission spectrometry (ICP AES). No interelement effects were observed when present together solutions. precision ( S r ) calculated 0.04, 0.05, 0.06 Sr, respectively. are caused small particle size (15 – 17 nm) uniform distribution aliquot chosen preparation method. It is shown that all samples have single phase corresponding pure ferrite orthorhombic crystal lattice (ICDD 37-1493). absence extraneous reflexes diffractogram indicates successful incorporation 2+ cations into La 3+ positions. doping made it possible increase sensitivity materials CO, NH , methanol acetone, well reduce optimal operating temperature sensor 150°C. At same time, best found nanofibers minimum introduced (0.01 % at.). methane benzene due greater stability these molecules respect acid-base active surface centers 1 x Me FeO .

Language: Английский

Recent advancement in selective gas sensors and role of machine learning

Journal of Alloys and Compounds, Journal Year: 2025, Volume and Issue: unknown, P. 180757 - 180757

Published: May 1, 2025

Language: Английский