Hydrothermal synthesis of cobalt particles with hierarchy structure and physicochemical properties

Xu, Xiangming; Zhao, Yongjie; Li, Jinbo; Jin, Haibo; Zhao, Yuzhen; Zhang, Heping

doi:10.1016/j.materresbull.2015.07.009

Cited by 14 publications

(2 citation statements)

References 26 publications

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“…In addition, both graphene and Fe 2 O 3 have been proven to be effective catalysts on AP decomposition by reducing the apparent activation energy. , Chen et al revealed that Fe 2 O 3 with hierarchically ordered porous carbon could effectively promote AP decomposition by decreasing the apparent activation energy as well as lowering the decomposition temperature . Generally, the effects of catalysts on AP decomposition are extensively studied by thermoanalytical methods, such as differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and differential thermal analysis (DTA), − which are revealed to be essential to analyze the AP catalytic decomposition. These techniques are based on experiments to assess AP decomposition parameters, such as the decomposition temperature, heat release of decomposition, apparent activation energy, and chemical reaction pathway. ,− However, most of the studies rarely to describe the details and micromechanism of the catalytic process of AP decomposition at the atomic level, which is vital to understand the AP combustion features deeply.…”

Section: Introductionmentioning

confidence: 99%

First-Principles Investigation of Graphene and Fe₂O₃ Catalytic Activity for Decomposition of Ammonium Perchlorate

2022

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The employment of catalysts is an effective way to improve ammonium perchlorate (AP) decomposition performance during the combustion of composite solid propellants. Understanding the micromechanism of catalysts at the atomic level, which is hard to be observed by experiments, can help attain more excellent decomposition properties of AP. In this study, first-principles simulations based on density functional theory were used to explore the effect of the graphene catalyst and iron oxide (Fe2O3) catalyst on AP decomposition. Considering the transfer of a H atom during AP decomposition, the most stable adsorption sites for aforementioned catalysts were found: the top of the C atom of the graphene surface with the adsorption energy of −0.378 eV and the top of the Fe atom of the Fe2O3 surface with the adsorption energy of −1.596 eV. On the basis of adsorption results, our transition state calculations indicate that, in comparison to control groups, graphene and Fe2O3 can reduce the activation energy barrier by ∼19 and ∼37%, respectively, to promote AP decomposition with a transfer process of a H atom on the catalyst surface. Our calculations provide a way for explaining the micromechanism of the catalytic activity of graphene and Fe2O3 nanocomposites in AP decomposition and guide experimental applications of graphene and Fe2O3 for catalytic reactions.

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Section: Introductionmentioning

confidence: 99%

First-Principles Investigation of Graphene and Fe₂O₃ Catalytic Activity for Decomposition of Ammonium Perchlorate

2022

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“…Adsorption equilibrium is established in the dynamic sense when the rate of adsorption of the adsorbed component on the surface is equal to its rate of absorption [16], self-cleaning glasses and organic molecules degradation [17]. Hydrothermal synthesis method has many advantage such as energy storage [18], simplicity [19], low cost [20], better nuclear control [21], pollution-free (because reaction takes place indoors) [22], better diffusivity [23], high reaction speed and better shape control [24]. In recent years, many nanocomposites used for degradation or adsorption of organic dyes [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Removal of organic dye compounds in water and wastewater samples based on covalent organic frameworks -titanium dioxide before analysis by UV-VIS spectroscopy

Bahadori

Corresponding

2021

Anal. Method Environ. Chem. J.

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A simple and rapid microwave-assisted combustion method was developed to synthesize homogenous carbon nanostructures (HCNS). This research presents a new and novel nanocomposite structures for removal of methylene red (2-(4- Dimethylaminophenylazo)benzoic acid), methylene orange (4-[4-(Dimethylamino)phenylazo]benzenesulfonic acid sodium salt) and methylene blue (3,7-bis(Dimethylamino)phenazathionium chloride)with semi degradation-adsorption solid phase extraction (SDA-SPE) procedure before determination by UV-VIS spectroscopy. A covalent organic frameworks (COFs) with high purity were synthesized and characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results indicated that the self-assembled carbon nanostructures (COFs) synthesized with the cost-effective method which was used as a novel adsorbent for adsorption of dyes after semi-degradation of methylene red, orange and blue (1-5 mg L-1) as an organic dye by titanium dioxide (TiO2) nanoparticales in presence of UV radiation. Based on results, the COFs/TiO2 has good agreement with the Langmuir adsorption isotherm model with favorite coefficient of determination (R2= 0.9989). The recovery of dye removal based on semi-degradation/adsorption of COFs/TiO2 and adsorption of COFs were obtained 98.7% and 48.3%, respectively (RSD less than 5%). The method was validated by spiking dye to real samples.

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Porous layer assembled hierarchical Co3O4 as anode materials for lithium-ion batteries

Zhai

Zhu

et al. 2017

J Mater Sci

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Hydrothermal synthesis of cobalt particles with hierarchy structure and physicochemical properties

Cited by 14 publications

References 26 publications

First-Principles Investigation of Graphene and Fe₂O₃ Catalytic Activity for Decomposition of Ammonium Perchlorate

First-Principles Investigation of Graphene and Fe₂O₃ Catalytic Activity for Decomposition of Ammonium Perchlorate

Removal of organic dye compounds in water and wastewater samples based on covalent organic frameworks -titanium dioxide before analysis by UV-VIS spectroscopy

Porous layer assembled hierarchical Co3O4 as anode materials for lithium-ion batteries

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Hydrothermal synthesis of cobalt particles with hierarchy structure and physicochemical properties

Cited by 14 publications

References 26 publications

First-Principles Investigation of Graphene and Fe2O3 Catalytic Activity for Decomposition of Ammonium Perchlorate

First-Principles Investigation of Graphene and Fe2O3 Catalytic Activity for Decomposition of Ammonium Perchlorate

Removal of organic dye compounds in water and wastewater samples based on covalent organic frameworks -titanium dioxide before analysis by UV-VIS spectroscopy

Porous layer assembled hierarchical Co3O4 as anode materials for lithium-ion batteries

Contact Info

Product

Resources

About

First-Principles Investigation of Graphene and Fe₂O₃ Catalytic Activity for Decomposition of Ammonium Perchlorate

First-Principles Investigation of Graphene and Fe₂O₃ Catalytic Activity for Decomposition of Ammonium Perchlorate