2006
DOI: 10.1016/j.snb.2005.08.010
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A selective NH3 gas sensor based on Fe2O3–ZnO nanocomposites at room temperature

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Cited by 162 publications
(77 citation statements)
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“…The increasing concentrations of electrons and the existence of negative charge on the SnO 2 particles lead to downward bending of the conduction and valence bands. This result is accompanied by an increase in bonding energy of Sn and O ions in the lattice of SnO 2 with a corresponding shift of the bands in the XPS spectra (see, e.g., (Yang, et al, 2006). Correspondingly, a decrease in the binding energy of the In and O ions should be observed in the In 2 O 3 + lattice due to lowering of the electron density in the In 2 O 3 + crystals.…”
Section: Charge Transfer Processesmentioning
confidence: 99%
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“…The increasing concentrations of electrons and the existence of negative charge on the SnO 2 particles lead to downward bending of the conduction and valence bands. This result is accompanied by an increase in bonding energy of Sn and O ions in the lattice of SnO 2 with a corresponding shift of the bands in the XPS spectra (see, e.g., (Yang, et al, 2006). Correspondingly, a decrease in the binding energy of the In and O ions should be observed in the In 2 O 3 + lattice due to lowering of the electron density in the In 2 O 3 + crystals.…”
Section: Charge Transfer Processesmentioning
confidence: 99%
“…Mixed metal oxide systems containing metal oxides of different electronic structure which interact with each other offer much more promise than single oxides for sensitive and selective detection of various gases in the environment (de Lacy Costello, et al, 2002;Tang, et al, 2006;Shouli, et al, 2010;Ivanovskaya, et al, 2003). Interaction between the component of metal oxide systems can lead to a change in the electronic structure of the nanocrystals and, hence, affect their reactivity.…”
Section: Sensors Based On Mixed Metal Oxidesmentioning
confidence: 99%
“…These reasons make necessary the detection of NH 3 gas at room temperature. Researchers have also developed sensors based on various polymers, metal sulphides 7 , metal oxides [26][27][28] and their composites 29 , which can be used to detect NH 3 gas. But, it is more important to develop sensors that should be cheap and small in size and can be operated at room temperature.…”
Section: -26mentioning
confidence: 99%
“…In addition, 0.5 mol% is found to be an optimal WO 3 concentration which gives the highest sensitivity towards NO 2 . Other mixed oxides showing improved gas sensing properties include Cr 2 O 3 -WO 3 films for NO 2 in NO X mixtures (Cantalini, 2004), Fe 2 O 3 -ZnO films for NH 3 (Tang, 2006) and CuOCu x Fe 3-x O 4 (with 0 < x < 1) for CO 2 (Chapelle, 2010).…”
Section: Unique Propertiesmentioning
confidence: 99%