Facile and scalable preparation of α-Fe2O3 nanoparticle by high-gravity reactive precipitation method for catalysis of solid propellants combustion

Cao, Shaobo; Han, Xianyao; Zhang, Liang‐Liang; Wang, Jie‐Xin; Luo, Yong; Chen, Jianfeng

doi:10.1016/j.powtec.2019.05.062

Cited by 45 publications

(18 citation statements)

References 33 publications

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“…However, the surface sites of these catalysts easily adsorb some small molecules like H 2 O since the appearance of adsorbed oxygens, which is confirmed by FTIR spectra further (Figure 3D). The broad peak from 3100 to 3600 cm −1 represents the stretching vibration peak of hydroxy and two peaks at 460 and 550 cm −1 represent the FeO bonds 26,39–41 . Peaks corresponding to CH bonds (2978 and 1055 cm −1 ) are also be detected but the intensity of them is very weak compared to that of FeO bonds, indicating the adsorbed substance is few and can be ignored.…”

Section: Resultsmentioning

confidence: 99%

“…Three shapes including rod, rhombus, and pseudopotential cube of α-Fe 2 O 3 were prepared using reported methods (Figure 1). 26,27 Rod-like α-Fe 2 O 3 (ro-Fe 2 O 3 ) was prepared using a hydrothermal method. First, 2.02 g of ferric nitrate nonahydrate (Fe[NO 3 ] 3 Á9H 2 O, 99.0%; Aladdin) was dissolved in 20 ml of deionized water.…”

Section: Experimental and Computational Methodsmentioning

confidence: 99%

“…The rhombic α-Fe 2 O 3 (rh-Fe 2 O 3 ) was prepared by liquid-phase precipitation method. 26 First, 150 ml of urea solution (1.5 M) was added into 150 ml of ferric chloride (FeCl 3 , 99.0%; Aladdin) solution (0.2 M) under stirring. Then, the mixture was heated to 95 C and maintained for 4 h under condensing reflux.…”

Section: Experimental and Computational Methodsmentioning

confidence: 99%

“…The broad peak from 3100 to 3600 cm À1 represents the stretching vibration peak of hydroxy and two peaks at 460 and 550 cm À1 represent the Fe O bonds. 26,[39][40][41] Peaks corresponding to C H bonds (2978 and 1055 cm À1 ) are also be detected but the intensity of them is very weak compared to that of Fe O bonds, indicating the adsorbed substance is few and can be ignored. Thus, the as-prepared catalysts are suitable to be used as model catalysts.…”

Section: Characterization Of Model Catalystsmentioning

confidence: 99%

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Quantitatively evaluating activity and number of catalytic sites on metal oxide for ammonium perchlorate decomposition

et al. 2022

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Ammonium perchlorate (AP) catalytic thermal decomposition by metal oxides is complex and there is still no suitable quantitative evaluation method to characterize intrinsic catalytic activity. Here, a new method to quantitatively evaluate the catalytic capability of metal oxides for AP decomposition has been proposed. We introduce two indicators, intrinsic peak temperature (T Ã HTD ) and catalytic density (ρ T Ã ) in hightemperature decomposition process, to uncouple activity and number of catalyst sites. Hematite (α-Fe 2 O 3 ) nanostructures with different shapes have been used as model catalysts to verify the feasibility of this method. Rod-like α-Fe 2 O 3 shows the best catalytic performance in AP decomposition with the lowest T Ã HTD of 345.1 C and highest ρ T Ã of 0.544, which indicate the largest number and highest activity of catalytic sites. Moreover, these new indicators are theoretically proven to be reasonable by density functional theory calculations.

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Section: Resultsmentioning

confidence: 99%

Section: Experimental and Computational Methodsmentioning

confidence: 99%

Section: Experimental and Computational Methodsmentioning

confidence: 99%

Section: Characterization Of Model Catalystsmentioning

confidence: 99%

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Quantitatively evaluating activity and number of catalytic sites on metal oxide for ammonium perchlorate decomposition

et al. 2022

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“…Common additives, such as metals, metal oxides, and metal salts, are often used to catalyze the thermal decomposition of AP. , However, these additives mainly focus on decreasing the decomposition temperature of AP, few of those focus on increasing the heat release. − For instance, NdCrO 3 can decrease the thermal decomposition temperature of AP by 87 °C but only increase the heat release by about 0.8 times . These common additives are nonenergetic and may decrease the integral energy density of CSPs with increasing the content of additives. − Therefore, energetic additives that can both increase heat release and decrease the decomposition temperature of AP need to be further explored. − For instance, the peak temperature of AP in high-temperature decomposition (HTD) can be reduced by 60 °C, and the heat release can be increased by about 1.8 times with the addition of Cu-BTC .…”

Section: Introductionmentioning

confidence: 99%

Exploring the Roles of ZIF-67 as an Energetic Additive in the Thermal Decomposition of Ammonium Perchlorate

et al. 2021

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Energetic additives can effectively increase the heat release of ammonium perchlorate (AP) decomposition to prevent nonenergetic additives from decreasing the energy density of composite solid propellants. However, the roles of energetic additives are unclear due to their complex changes in the decomposition process. Using ZIF-67 as a model energetic additive, we investigate its roles and catalytic processes in the decomposition of AP, especially the effect on heat release. We find that the decomposition process includes two periods: low-temperature oxidation of ZIF-67 by AP and high-temperature catalytic decomposition of excess AP. The oxidation of ZIF-67 can release a mass of heat and provide oxidation products for catalytic decomposition of excess AP. Meanwhile, the heat release of excess AP is increased to 2.33 times compared with pure AP (1.83 vs 0.78 kJ•g −1 ), and the relationship between heat release and the content of ZIF-67 is quantified. Our results provide new insights into the roles of MOFs in enhancing the thermal decomposition of AP.

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A universal strategy for efficient synthesis of Zr‐based MOF nanoparticles for enhanced water adsorption

et al. 2023

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Zr‐based metal‐organic framework (Zr‐MOF) nanoparticles (NPs) have attracted extensive research thanks to their outstanding thermal and chemical stability, but their efficient synthesis is still challenging. Here, high‐quality Zr‐MOF NPs with tunable and uniform particle sizes can be successfully fabricated within 30 min by high‐gravity technology with high yields. Significantly, the rapidly milder preparation of UiO‐66 NPs can also be achieved at 90 or 70°C. This strategy has been extended to the synthesis of other Zr‐MOF NPs. Furthermore, the water vapor adsorption properties of obtained UiO‐66 NPs display a size‐dependent effect. The 70 nm UiO‐66 NPs have the highest adsorption capacity of 625 mg g−1 among unmodified UiO‐66 reported so far, and manifest 2.0–2.8 times faster water adsorption rate than the micron ones. This study provides a feasible method for the efficient and mild preparation of MOFs nanoparticles, which may promote the synthesis and applications of nano‐sized MOFs.

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Facile and scalable preparation of α-Fe2O3 nanoparticle by high-gravity reactive precipitation method for catalysis of solid propellants combustion

Cited by 45 publications

References 33 publications

Quantitatively evaluating activity and number of catalytic sites on metal oxide for ammonium perchlorate decomposition

Quantitatively evaluating activity and number of catalytic sites on metal oxide for ammonium perchlorate decomposition

Exploring the Roles of ZIF-67 as an Energetic Additive in the Thermal Decomposition of Ammonium Perchlorate

A universal strategy for efficient synthesis of Zr‐based MOF nanoparticles for enhanced water adsorption

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