Gas sensing properties of YMnO3 based materials for the detection of NOx and CO

Addabbo, Tommaso; Bertocci, Francesco; Fort, Ada; Gregorkiewitz, M.; Mugnaini, Marco; Spinicci, R.

doi:10.1016/j.snb.2017.01.054

Cited by 19 publications

(16 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a whole, the amount of charge localized at the surface is due both to intrinsic ionized defects and to the chemisorbed molecules with a total surface charge density − qN s , being q the electron charge and N s the total negatively charged species density that can be written as [1,25,26,27] NS=±Ni+[(SO−O)−]+[(SNO2−NO2)−] where N i indicates the density of ionized intrinsic defects that can be either acceptors or donors (actually, the surface of semiconductors tends always to be depleted [10]), and [ X ] indicates the surface density of the species X . In this work, we consider to have only extrinsic acceptor surface states due to the adsorption of both atomic oxygen and of the target gas NO 2 , a net negative charge, so that N s cannot usually assume a negative sign.…”

Section: Sensor Model For Oxidizing Gasmentioning

confidence: 99%

Gas Sensing Properties of In2O3 Nano-Films Obtained by Low Temperature Pulsed Electron Deposition Technique on Alumina Substrates

Addabbo

Bruzzi

Fort

et al. 2018

Sensors

Self Cite

View full text Add to dashboard Cite

Nanostructured Indium(III) oxide (In2O3) films deposited by low temperature pulsed electron deposition (LPED) technique on customized alumina printed circuit boards have been manufactured and characterized as gas sensing devices. Their electrical properties have monitored directly during deposition to optimize their sensing performance. Experimental results with oxidizing (NO2) as well as reducing (CO) gases in both air and inert gas carriers are discussed and modeled.

show abstract

Section: Sensor Model For Oxidizing Gasmentioning

confidence: 99%

Gas Sensing Properties of In2O3 Nano-Films Obtained by Low Temperature Pulsed Electron Deposition Technique on Alumina Substrates

Addabbo

Bruzzi

Fort

et al. 2018

Sensors

Self Cite

View full text Add to dashboard Cite

show abstract

“…The surface reaction, which is usually considered to be responsible for the behavior of p-type and n-type metal oxide sensors, is the following [12]:NO2+SNO2+e−⇔ false(SNO2−NO2false)− (normaln-type) NO2+SNO2⇔ false(SNO2−NO2false)−+h+ (normalp-type)…”

Section: Resultsmentioning

confidence: 99%

“…The surface reaction, which is usually considered to be responsible for the behavior of p-type and n-type metal oxide sensors, is the following [ 12 ]:

…”

Section: Resultsmentioning

confidence: 99%

“…The shape of the function f ( f ’) depends on the geometry of the grains [1,12], for large grains it is well known that:for normalp−material: Vs=qNs22ϵpb for normaln−material: Vs=qNs22ϵnb where n b and p b are the bulk carrier densities (usually considered constant in the working temperature range and, being N A ( N D ) the bulk density of acceptors (donors), n b ≈ N D and p b ≈ N A ). In the case of nano-structures, this equation can only give a coarse approximation of f , but, in any case, it can still describe the main characteristics of the sensor behavior [1].…”

Section: Gas Sensing Modelingmentioning

confidence: 99%

“…In fact, the addition of noble metals, such as platinum or gold, through the impregnation or incorporation in the oxide matrix, is an old one, and its effectiveness has been proven by a huge amount of literature and for many different metal oxides. More recently, the addition of nano-particles or of nano-clusters of noble metal has been considered [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Co3O4/Al-ZnO Nano-composites: Gas Sensing Properties

Fort

Panzardi

Hjiri

et al. 2019

Sensors

Self Cite

View full text Add to dashboard Cite

In this paper, the gas sensing properties of metal oxide nano-powder composites are studied and modeled. The gas sensing properties of mixtures of two different metal oxide nanoparticles, prepared via low-cost routes, are investigated. The responses to both an oxidizing (NO2) and a reducing gas (CO) are analyzed. The tested composites are obtained by mixing a different percentage of a p-type metal oxide, Co3O4, with moderate responses to NO2 at about 200 °C and to CO at high temperature (above 260 °C), with n-type Al-doped ZnO, which is characterized by a large but unstable response towards NO2 around 160 °C and a moderate response towards CO around 200 °C. In the oxides mixtures, p-n heterojunctions are formed by the juxtaposition of an n-type and a p-type grain in contact. Consequently, the electronic conductivity is modified and the obtained composite materials show novel characteristics with respect to the base materials. This indicates that predicting the behavior of the composites from those of their components is not possible and it suggests that the hetero-junction behavior has to be studied to understand the sensing properties of the composite materials. The obtained results indicate that the composites containing a significant amount of hetero-junctions exhibit a stable response to NO2 at room temperature and significant responses towards CO at 160 °C.

show abstract

Recent advances in novel materials for photocatalytic carbon dioxide reduction

Lu,

Zhang,

Liu

et al. 2024

Carbon Neutralization

View full text Add to dashboard Cite

The conversion of CO2 into chemical fuels, which can be stored and utilized through photocatalysis, represents an effective, environmentally friendly, and sustainable means to address both environmental concerns and energy shortages. CO2, as a stable oxidation product, poses challenges for reduction through light energy alone, necessitating the use of catalysts. Thus, a crucial aspect of CO2 photocatalytic reduction technology lies in the development of effective photocatalysts. Based on the basic principle of PCRR (photocatalytic CO2 reduction reaction), the review provides a detailed introduction to the core issues in PCRR process, including the relationship between band gap and catalyst reduction performance, effective utilization of photogenerated carriers, product selectivity, and methods for product analysis. Then, the recent research progresses of various photocatalysts are reviewed in the form of research examples combined with the above basic principles. Finally, this review summarizes and provides insights into the effective techniques for enhancing the photocatalytic activity of CO2, while also offering future prospects in this field.

show abstract

Gas sensing properties of YMnO3 based materials for the detection of NOx and CO

Cited by 19 publications

References 51 publications

Gas Sensing Properties of In2O3 Nano-Films Obtained by Low Temperature Pulsed Electron Deposition Technique on Alumina Substrates

Gas Sensing Properties of In2O3 Nano-Films Obtained by Low Temperature Pulsed Electron Deposition Technique on Alumina Substrates

Co3O4/Al-ZnO Nano-composites: Gas Sensing Properties

Recent advances in novel materials for photocatalytic carbon dioxide reduction

Contact Info

Product

Resources

About