Open AccessСтабильность сенсоров паров жидких углеводородов на основе тонких пленок SnO-=SUB=-2-=/SUB=-, модифицированных различными катализаторами
Author(s) -
N. K. Маksimova,
Б.О. Кушнарев,
Л.С. Хлудкова,
А.А. Бирюков,
Е.Ю. Севастьянов,
Е. V. Chernikov
Publication year - 2021
Publication title -
žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-748X
pISSN - 0044-4642
DOI - 10.21883/jtf.2021.07.50958.349-20
Subject(s) - nanocrystalline material , materials science , raman spectroscopy , catalysis , chemical engineering , nanoscopic scale , detection limit , thin film , analytical chemistry (journal) , spectroscopy , nanotechnology , chemistry , optics , organic chemistry , physics , engineering , chromatography , quantum mechanics
The electrical and gas-sensitive characteristics of sensors based on thin nanocrystalline SnO2 films with various catalysts deposited on the surface (Pt/Pd, Au) and introduced into the bulk (Au, Ni, Co) are studied in the modes of constant and pulsed heating. Atomic force microscopy and laser Raman spectroscopy were used to study the micromorphology and structural defects depending on the composition of nanoscale films. it is shown that sensors with au and co additives introduced into the volume can detect liquid hydrocarbon vapors (for example, aviation kerosene) at a concentration level of 5 ppm (0.1 permissible exposure limit) and are characterized by increased stability of parameters during testing under prolonged exposure to vapors, as well as in conditions of changing humidity. Sensors with Au and Co additives in bulk and ultrathin Pt/Pd catalysts applied to the surface of the films are characterized by the highest performance after testing.