Preparation and catalytic activities of LaFeO3 and Fe2O3 for HMX thermal decomposition

Wei, Zhi-Xian; Xu, Yanqing; Liu, Haiyan; Hu, Changwen

doi:10.1016/j.jhazmat.2008.10.086

Cited by 117 publications

(28 citation statements)

References 19 publications

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“…Most likely the carbonation of lanthanum ions occurs while calcining the auto-combusted powder at higher temperature (700°C) in a CO 2 containing ambient. The origin of CO 2 is thought to be due to oxidative decomposition of organic moieties present in the auto-combusted powders [26]. We have also identified a broad shoulder (de-convoluted *1585 cm -1 ) in the calcined LaFeO 3 powder.…”

Section: Methodsmentioning

confidence: 59%

“…In addition, the mode due to surface-adsorbed oxygen species (*1635 cm -1 ) is well separated in the LaFe 0.8 Co 0.2 O 3 spectra. In a recent publication, Z-X Wei et al [26] also reported the presence of surface-adsorbed oxygen, hydroxyl group, and La 2 O 2 CO 3 species on perovskite La FeO 3 surface. Among these, the carbonate species were not catalytically active, however, the surface-adsorbed oxygen (O ad ) and hydroxyl played important role to exhibit good catalytic performance of LaFeO 3 surface for thermal decomposition of octahydro-1,3,5,7-tetrazocine (HMX).…”

Section: Methodsmentioning

confidence: 95%

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The role of catalytic cobalt-modified lanthanum ferrite nano-crystals in selective sensing of carbon monoxide

2014

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In the present work we have investigated the carbon monoxide (CO) sensing characteristics of cobaltmodified lanthanum iron oxide perovskite sensors. Nanoparticles of lanthanum ferrite and cobalt-modified lanthanum ferrites have been synthesized by auto-combustion route. We have reported that Co-modified LaFeO 3 sensor is capable to sense low-concentration (\100 ppm) CO selectively at operating temperature as low as 100°C. The selective CO sensing characteristics at lower operating temperature are correlated to the superior catalytic activities of these perovskite toward CO oxidation. For these perovskite sensors it was demonstrated that the lower metal-oxygen binding energy, favorable d orbital electron configuration of transition metal cation/(s), and the nature of surface composition are the three dominant factors that control the catalytic activity and thereby the CO sensing characteristics.

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Section: Methodsmentioning

confidence: 59%

Section: Methodsmentioning

confidence: 95%

The role of catalytic cobalt-modified lanthanum ferrite nano-crystals in selective sensing of carbon monoxide

2014

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“…LaFeO 3 was synthesized by stearic acid solution combustion method [16]. LaFe 0.5 Mn 0.5 O 3Àd was also synthesized by the same method.…”

Section: Materials Synthesis and Characterizationmentioning

confidence: 99%

“…Further, K. Ueda et al reported that the LaFe 0.5 Mn 0.5 O 3Àd has the possibility of double exchange between Mn 3þ and Fe 3þ and hence has the ferromagnetism [15]. Considering that a preparation method can play an important role in the properties of the products including magnetic properties and photocatalytic activities, the LaFe 0.5 Mn 0.5 O 3Àd was prepared with appropriate stearic acidemetal salts ratio by the stearic acid solution combustion method [16] in this study. The stearic acid solution combustion route is suitable for the generation of high surface area oxides, which is helpful to its photocatalytic and magnetic properties.…”

Section: Introductionmentioning

confidence: 99%

“…The stearic acid solution combustion route is suitable for the generation of high surface area oxides, which is helpful to its photocatalytic and magnetic properties. Moreover, in order to research the origin of the ferromagnetism of the LaFe 0.5 Mn 0.5 O 3Àd and the effect of BSite doping or sharing in LaFeO 3 by Mn on the magnetic property and catalytic activities of the LaFe 0.5 Mn 0.5 O 3Àd , LaFeO 3 is also prepared by the same method [16]. In addition, methyl orange (MO) was chosen as a model pollutant to evaluate the photocatalytic activity of the LaFeO 3 and LaFe 0.5 Mn 0.5 O 3Àd in this study.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis, magnetization and photocatalytic activity of LaFeO3 and LaFe0.5Mn0.5−xO3−δ

Wei

Wang²,

Liu

et al. 2012

Materials Chemistry and Physics

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Characterization of Aluminum Powders: III. Non‐Isothermal Oxidation and Combustion of Modern Aluminized Solid Propellants with Nanometals and Nanooxides

Gromov

Sergienko

Popenko

et al. 2020

Propellants Explo Pyrotec

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Aluminum powders were comprehensively described as the prospective ingredients of the modern propellants. The paper also studied the influence of micro-and nanopowders of metals (μ-Me and n-Me) and metal oxides (μ-MeO and n-MeO) on the burning process of modern aluminized propellant with HMX, CL-20, AP, and active binder. The following metal additives were used: Al, B, Zn, Ni, Co, and Mo. The effect of the following oxides CoO, V 2 O 5 , MnO 2, and Fe 2 O 3 was studied together with LiF. The combustion tests of modified propellant compositions were carried out in the Vielle bomb in a pressure range 2-10 MPa. n-Me addition resulted in an increase in the burning rate by 10 % for n-B, by 30-40 % for n-Ni and n-Mo in the studied pressure range. The introduction of n-Cu caused a burning rate to increase fivefold. n-Zn additive resulted in increasing of the propellant burning rate by 130 % and 260 % at 4 and 10 MPa, respectively. It was probably caused by the catalytic activity of those metals in the gaseous phase. The effect of complex additive was observed to be insignificant for additives with μ-Co 3 O 4 , μ-V 2 O 5 , μ-Fe 2 O 3 and n-Fe 2 O 3 . The burning rate of propellant with n-CuO additive value was higher by a factor of 4 in comparison with the basic formulation in the studied pressure range.

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Preparation and catalytic activities of LaFeO3 and Fe2O3 for HMX thermal decomposition

Cited by 117 publications

References 19 publications

The role of catalytic cobalt-modified lanthanum ferrite nano-crystals in selective sensing of carbon monoxide

The role of catalytic cobalt-modified lanthanum ferrite nano-crystals in selective sensing of carbon monoxide

Synthesis, magnetization and photocatalytic activity of LaFeO3 and LaFe0.5Mn0.5−xO3−δ

Characterization of Aluminum Powders: III. Non‐Isothermal Oxidation and Combustion of Modern Aluminized Solid Propellants with Nanometals and Nanooxides

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