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2篇 您的检索式：作者名="Lhadi Merhari"

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		题名	作者	年代	出处	被引量
	1	Surface chemistry of TiO2 nanoparticles:influence on electrical and gassensing properties显示文摘	Marie Isabelle Baraton Lhadi Merhari	2004	Journal of the European Ceramic Society2004，24，6：	1
	2	Chemical Investigation of the NO_x Detection Mechanisms by Semiconductor Metal Oxide Nanoparticles显示文摘This work reports an FTIR study of the NO_x adsorption/desorption cycles on tin oxide nanosized particles under the operating conditions of real sensors (150℃,in presence of O_2).The chemical reactions are monitored in situ and correlated with the variations of the SnO_2 electrical conductivity.On the basis of the FTIR spectra,two contributing mechanisms for the NO_x detection are suggested.The first one presents the formation of bridged nitrate groups bound to the SnO_2 surface via oxygen vacancies acting as electron donor sites.The second mechanism also involves surface oxygen vacancies in the coordination of NO_x,but this time the formation of NO_x anionic species is considered.Both mechanisms lead to the decrease of the electrical conductivity under NO_x adsorption.However,the bridged nitrate groups are not reversible under gas desorption and thus irreversibly contaminate the surface after the first NO_x adsorption.On the contrary,the nitrosyl anionic species are reversible and,from the second NO_x adsorption/desorption cycle,ensure the reproducibility of the sensor response.	Marie-Isabelle Baraton Lhadi Merhari	2006	稀有金属材料与工程2006，35，A03：	0

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