论文信息 - DRIFTS analysis of the CO2 detection mechanisms using LaOCl sensing material

DRIFTS analysis of the CO2 detection mechanisms using LaOCl sensing material

Diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) analyses are described to study the CO2 sensing mechanisms in LaOCl wet chemically synthesized nanopowders. In order to establish a connection between resistance values and DRIFTS spectra, the two measurements were made simultaneously. A PLS data treatment was then applied to identify which of the absorbed specimens contribute essentially to resistance changes. Furthermore, the obtained results are discussed in light of the overall available information. From this discussion, a sensing mechanism is suggested in agreement with sensor performance and characteristics.

[1] M. Vannice,et al. Influence of Pretreatment on Lanthanum Nitrate, Carbonate, and Oxide Powders , 1996 .

[2] J. Mascetti,et al. Fourier transform infrared studies of atomic titanium, vanadium, chromium, iron, cobalt, nickel and copper reactions with carbon dioxide in low-temperature matrices , 1988 .

[3] Nicolae Barsan,et al. DRIFT studies of thick film un-doped and Pd-doped SnO2 sensors: temperature changes effect and CO detection mechanism in the presence of water vapour , 2003 .

[4] G. Busca,et al. Infrared spectroscopic identification of species arising from reactive adsorption of carbon oxides on metal oxide surfaces , 1982 .

[5] P. Kubelka. Ein Beitrag zur Optik der Farban striche , 1931 .

[6] K. Nakamoto. Infrared and Raman Spectra of Inorganic and Coordination Compounds , 1978 .

[7] S. Bordiga,et al. UV reflectance and FTIR spectroscopic studies of CO adsorption and reaction on lanthanum oxide , 1996 .

[8] Jean-Claude Lavalley,et al. Infrared spectrometric studies of the surface basicity of metal oxides and zeolites using adsorbed probe molecules , 1996 .

[9] M. A. Vannice,et al. NO adsorption and decomposition on La2O3 studied by DRIFTS , 1999 .

[10] Y. Laurent,et al. DRIFTS Chamber for in Situ and Simultaneous Study of Infrared and Electrical Response of Sensors , 1995 .

[11] M. Rosynek. Catalytic Properties of Rare Earth Oxides , 1978 .

[12] A. Cornet,et al. A new CO2 gas sensing material , 2003 .