Preparation, Characterization and Catalytic Activity of Transition Metal Oxide Nanocrystals

Singh, Gurdip; Kapoor, Inder Pal Singh; Dubey, Shalini; Siril, Prem Felix

doi:10.1166/jcp.2009.002

Cited by 41 publications

(25 citation statements)

References 4 publications

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“…With temperature increase of above 500 C, the catalytic activity of the additive decreases substantially [37]. As compared to bulk size, the effect of nanoparticles ($4 nm) of nickel oxide on the thermal decomposition of NH 4 ClO 4 was studied by Singh et al [12]. According to their investigation, catalytic activity enhanced approximately four times (Table 1) and with the increased percentage of additive, rate of decomposition of AP increased (Figure 3).…”

Section: Effect Of Nanosized Oxides As Compared To Bulk Sized Oxidesmentioning

confidence: 99%

“…AP is the most common oxidiser in CSPs. Thermal decomposition characteristics of AP influence the combustion behaviour of the propellants [31,12]. AP-based CSPs require combustion modifiers to achieve higher burning rates and conventionally TMOs are used as the burning rate modifiers [31][32][33][34].…”

Section: Ammonium Perchloratementioning

confidence: 99%

“…In addition, the different morphologies of nanocrystals are expected to have different effects on the thermal decomposition of AP [66]. A clear comparison is studied by Singh et al [12]; according to their investigations, catalytic activity of CuO is enhanced approximately by five times (Table 1). They have also studied the effect by varying the per cent content of additive in AP; the results show that 0.5% of nanosized CuO is a better catalyst than 1% of their bulk size ( Figure 3) and with the increase percentage of additive, rate of decomposition of AP increased.…”

Section: Effect Of Nanosized Oxides As Compared To Bulk Sized Oxidesmentioning

confidence: 99%

“…In technological applications, metal oxides are used in the fabrication of microelectronic circuits, sensors and fuel cells and as catalysts [6]. In the emerging field of nanotechnology, our goal is to make nanostructures with special properties with respect to those of bulk species [7][8][9][10][11][12]. Metal oxide nanocrystals can exhibit unique physico-chemical properties due to their nanosize and high density of cover or edge surface sites.…”

Section: Introductionmentioning

confidence: 99%

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Nano-metal oxide: potential catalyst on thermal decomposition of ammonium perchlorate

Chaturvedi

Dave

2011

Journal of Experimental Nanoscience

110

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In this review, an attempt to collect the summarised data of literature on catalytic effect of nano-oxides, such as mono oxides, mixed oxide, binary and ternary ferrites and rare earth metal oxides on the thermal decomposition of ammonium perchlorate (AP) is made. Influence of size effect of oxides on thermal decomposition of AP and comparison of bulk and nanosized oxides is also discussed here. Several experimental results revealed that due to small size and large surface area nanosized metal oxides are more potential catalysts on thermal decomposition of AP compared to their bulk size oxides.

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Section: Effect Of Nanosized Oxides As Compared To Bulk Sized Oxidesmentioning

confidence: 99%

Section: Ammonium Perchloratementioning

confidence: 99%

Section: Effect Of Nanosized Oxides As Compared To Bulk Sized Oxidesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Nano-metal oxide: potential catalyst on thermal decomposition of ammonium perchlorate

Chaturvedi

Dave

2011

Journal of Experimental Nanoscience

110

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“…Kishore [23]. Also, Singh et al studied the catalytic activity of nano-MnO 2 crystals on the thermal decomposition of AP and found that it enhances the thermal decomposition [24].…”

Section: Introductionmentioning

confidence: 99%

Studies on Effect of Nano-MnO2 in HTPB-based Composite Propellant Formulations

Kshirsagar

Jain

Bhandarkar

et al. 2017

Cent. Eur. J. Energ. Mater.

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Various propellant compositions were prepared incorporating fully characterized nano-sized manganese dioxide, from 0.25 wt.% to 1.0 wt.%, in HTPB/AP/Al-based composite propellant formulations having 86 wt.% of solid loading, and its effects on the viscosity build-up, thermal, mechanical and ballistic properties were studied. The findings revealed that on increasing the percentage of nano-MnO2 in the composition, there was an increase in the end of mix viscosity, the modulus and tensile strength, while the elongation decreased accordingly. The data on the thermal properties revealed a reduction in the decomposition temperature of ammonium perchlorate (AP) as well as of the formulations based on it. The data on the ballistic properties revealed that there is an enhancement in the burning rate from 6.11 mm/s (reference composition) to 7.54 mm/s at 6.86 MPa (a 23% enhancement in the burning rate) and an increase in the pressure exponent from 0.35 (reference composition) to 0.42 with 1.0 wt.% nano-MnO2.

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Kinetics of Thermal Decomposition of Ammonium Perchlorate with Nanocrystals of Binary Transition Metal Ferrites

Singh

Kapoor

Dubey

et al. 2009

Propellants Explo Pyrotec

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Binary transition metal ferrite (BTMF) nanocrystals of formula MFe 2 O 4 (M ¼ Cu, Co, Ni) were prepared by the coprecipitation method and characterized by X-ray diffraction (XRD). XRD patterns gave average particle size by using Scherrers equation for CuFe 2 O 4 (CuF), CoFe 2 O 4 (CoF), and NiFe 2 O 4 (NiF) as 39.9, 27.3, and 43.8 nm, respectively. The catalytic activity measurements on the thermal decomposition of ammonium perchlorate (AP) were carried out by using thermogravimetry (TG), differential thermal analysis (DTA), and ignition delay studies. Isothermal TG data up to a mass loss of 45% have been used to evaluate kinetic parameters by using model fitting as well as isoconversional method. The order of catalytic activity was found to be:

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Preparation, Characterization and Catalytic Activity of Transition Metal Oxide Nanocrystals

Cited by 41 publications

References 4 publications

Nano-metal oxide: potential catalyst on thermal decomposition of ammonium perchlorate

Nano-metal oxide: potential catalyst on thermal decomposition of ammonium perchlorate

Studies on Effect of Nano-MnO2 in HTPB-based Composite Propellant Formulations

Kinetics of Thermal Decomposition of Ammonium Perchlorate with Nanocrystals of Binary Transition Metal Ferrites

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