The role of Rh dispersion in gas sensing effects observed in SnO2 thin films

被引：12
|
作者：
Korotcenkov, G. [1 ]
Nehasil, V [2 ]
机构：
[1] Moldova State Univ, Dept Phys & Engn, Str Mateevici 60, Kishinev 2009, MD, Moldova
[2] Charles Univ Prague, Dept Surface & Plasma Sci, Prague, Czech Republic
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2019年 / 232卷
关键词：
Gas sensor; Spray pyrolysis; Conductivity response; Characterization; Optimization; Surface functionalization; Clustering; SPRAY-PYROLYSIS; ISOTOPIC EXCHANGE; METAL-OXIDES; IN-SITU; SENSORS; CO; PD; SELECTIVITY; OXIDATION; RHODIUM;
D O I：
10.1016/j.matchemphys.2019.04.069
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In the present work the effect of surface modification by rhodium on the conductivity response of the SnO2 films to reducing gases such as CO and H-2 and oxidizing gas ozone was analyzed. SnO2 films, subjected to surface modification, were deposited by spray pyrolysis, while Rh was deposited using a micro electron beam evaporation. The thickness of the Rh coating varied in the range of 0-0.1 ML. It was found that there is an optimal thickness of Rh, which gives an improvement in the sensor response and a decrease in the recovery time. An explanation of the observed effects was proposed. It was assumed that the atomically dispersed state of rhodium is most active in gas-sensing effects. The transformation from the atomic state to the cluster state reduces the efficiency of the surface functionalization of SnO2 with rhodium.
引用
收藏
页码：160 / 168
页数：9
相关论文
共 50 条
  • [11] SnO2 and SnO2:Pt thin films used as gas sensors
    Olvera, M.de la L.
    Asomoza, R.
    Sensors and Actuators, B: Chemical, 1997, B45 (01): : 49 - 53
  • [12] Adsorbates and their effects on gas sensing properties of sputtered SnO2 films
    Michel, HJ
    Leiste, H
    Schierbaum, KD
    Halbritter, J
    APPLIED SURFACE SCIENCE, 1998, 126 (1-2) : 57 - 64
  • [13] Nanostructured SnO2 thin films: effects of porosity and catalytic metals on gas-sensing sensitivity
    Mounir Gaidi
    Applied Physics A, 2018, 124
  • [14] Nanostructured SnO2 thin films: effects of porosity and catalytic metals on gas-sensing sensitivity
    Gaidi, Mounir
    APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2018, 124 (10):
  • [15] Gas Sensing Characterisation of CMOS Integrated Nanocrystalline SnO2 - Au Thin Films
    Wimmer-Teubenbacher, R.
    Steinhauer, S.
    von Sicard, O.
    Magori, E.
    Siegert, J.
    Rohracher, K.
    Gspan, C.
    Grogger, W.
    Koeck, A.
    MATERIALS TODAY-PROCEEDINGS, 2015, 2 (08) : 4295 - 4301
  • [16] Impact of NiO nanoparticle decoration on the surface of SnO2 thin films for gas sensing
    Chaker, Chiheb
    Abdulwahid, Khamael Ibrahim
    Chaker, Hanen
    APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2024, 130 (12):
  • [17] On the correlation between morphology and gas sensing properties of RGTO SnO2 thin films
    Szuber, J
    Uljanow, J
    Karczewska-Buczek, T
    Jakubik, W
    Waczynski, K
    Kwoka, M
    Konczak, S
    THIN SOLID FILMS, 2005, 490 (01) : 54 - 58
  • [18] Tin Acetylacetonate as a Precursor for Producing Gas-Sensing SnO2 Thin Films
    Simonenko, E. P.
    Simonenko, N. P.
    Mokrushin, A. S.
    Vasiliev, A. A.
    Vlasov, I. S.
    Volkov, I. A.
    Maeder, T.
    Sevastyanov, V. G.
    Kuznetsov, N. T.
    RUSSIAN JOURNAL OF INORGANIC CHEMISTRY, 2018, 63 (07) : 851 - 860
  • [19] Tin Acetylacetonate as a Precursor for Producing Gas-Sensing SnO2 Thin Films
    E. P. Simonenko
    N. P. Simonenko
    A. S. Mokrushin
    A. A. Vasiliev
    I. S. Vlasov
    I. A. Volkov
    T. Maeder
    V. G. Sevastyanov
    N. T. Kuznetsov
    Russian Journal of Inorganic Chemistry, 2018, 63 : 851 - 860
  • [20] Role of surface properties of MoO3-doped SnO2 thin films on NO2 gas sensing
    Kaur, Jaswinder
    Vankar, V. D.
    Bhatnagar, M. C.
    THIN SOLID FILMS, 2010, 518 (14) : 3982 - 3987
12345