Prospective of combustion method for preparation of nanomaterials: A challenge

Parauha, Yatish R.; Sahu, Vaibhavi; Dhoble, S.J.

doi:10.1016/j.mseb.2021.115054

Cited by 61 publications

(20 citation statements)

References 171 publications

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“…At the moment, a new direction of nanomaterials preparation by combustion method is being actively developed [44]. Due to the rapid redox reactions, the released heat is localized within a finite layer, establishing a high-temperature zone where metal-containing nanoparticles are formed.…”

Section: Introductionmentioning

confidence: 99%

“…Currently, aqueous solutions of nickel nitrate with urea and aluminum hydroxide [34] or nitrate [45] are used for the synthesis of effective nickel-based catalysts by solution combustion technique and selfpropagating high-temperature synthesis [46]. This work aims to develop a new approach to the synthesis of nanoscale nickelalumina catalysts for CO 2 methanation based on solid-state combustion (SSC) without using any solution [44]. Organometallic compounds prepared by solvent-free dry-melt synthesis [47,48] were used as Ni catalyst precursors.…”

Section: Introductionmentioning

confidence: 99%

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CO2 Methanation: Nickel–Alumina Catalyst Prepared by Solid-State Combustion

et al. 2021

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The development of solvent-free methods for the synthesis of catalysts is one of the main tasks of green chemistry. A nickel–alumina catalyst for CO2 methanation was synthesized by solid-state combustion method using hexakis-(imidazole) nickel (II) nitrate complex. Using X-ray Powder Diffraction (XRD), Transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and Hydrogen temperature-programmed reduction (H2-TPR), it was shown that the synthesized catalyst is characterized by the localization of easily reduced nickel oxide on alumina surface. This provided low-temperature activation of the catalyst in the reaction mixture containing 4 vol% CO2. In addition, the synthesized catalyst had higher activity in low-temperature CO2 methanation compared to industrial NIAP-07-01 catalyst, which contained almost three times more hard-to-reduce nickel–aluminum spinel. Thus, the proposed approaches to the synthesis and activation of the catalyst make it possible to simplify the catalyst preparation procedure and to abandon the use of solvents, which must be disposed of later on.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

CO2 Methanation: Nickel–Alumina Catalyst Prepared by Solid-State Combustion

et al. 2021

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“…The results showed that soot generated from RP-3 kerosene had smaller inter-planar spacing and fewer layers. Fuels with lower decomposition temperatures can more easily generate enough local heat to complete the reactions in the synthesis process and create materials of high porosity and good crystallinity, and also prevent particle agglomeration (Parauha et al, 2021).…”

Section: Effect Of Fuel Typementioning

confidence: 99%

A Review of Recent Research Results on Soot: The Formation of a Kind of Carbon-Based Material in Flames

Yang

Cai

et al. 2021

Front. Mater.

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As a product generated from incomplete combustion, soot is harmful to people’s health and the environment. In recent decades, much attention has been paid to the control of soot generation in combustion systems. Efforts to reduce soot emissions depend on a basic understanding of the physical and chemical pathways from fuel to soot particles in flames. At the same time, flame synthesis method has become an alternative method for the preparation of carbon nanomaterials because of its advantages of low cost and mass production. Carbon-based materials can be synthesized within the sooting zones in flames. The research of soot formation mechanism in flames can provide support for the synthesis of carbon nanomaterials. In this paper, the effects of additives, temperature, and fuel type on soot formation characteristics and soot nanostructure in diffusion flames are reviewed. The deficiencies and prospects are put forward for future research.

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“…[1][2][3] A variety of methods, such as pyrolysis, hydrothermal, sol-gel, electrospinning, etc., have been well developed to fabricate nanomaterials. [4][5][6][7][8][9] The desired physical state can be obtained by the corresponding method. Moreover, the synthesized nanomaterials' specific structure, shape, size, and surface determine the specific functions.…”

Section: Introductionmentioning

confidence: 99%

Understanding Synthesis and Structural Variation of Nanomaterials Through In Situ/Operando XAS and SAXS

Fang

Seifert

Winans

et al. 2022

Small

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Nanostructured materials with high surface area and low coordinated atoms present distinct intrinsic properties from their bulk counterparts. However, nanomaterials’ nucleation/growth mechanism during the synthesis process and the changes of the nanomaterials in the working state are still not thoroughly studied. As two indispensable methods, X‐ray absorption spectroscopy (XAS) provides nanomaterials’ electronic structure and coordination environment, while small‐angle X‐ray scattering (SAXS) offers structural properties and morphology information. A combination of in situ/operando XAS and SAXS provides high temporal and spatial resolution to monitor the evolution of nanomaterials. This review gives a brief introduction to in situ/operando SAXS/XAS cells. In addition, the application of in situ/operando XAS and SAXS in preparing nanomaterials and studying changes of working nanomaterials are summarized.

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Prospective of combustion method for preparation of nanomaterials: A challenge

Cited by 61 publications

References 171 publications

CO2 Methanation: Nickel–Alumina Catalyst Prepared by Solid-State Combustion

CO2 Methanation: Nickel–Alumina Catalyst Prepared by Solid-State Combustion

A Review of Recent Research Results on Soot: The Formation of a Kind of Carbon-Based Material in Flames

Understanding Synthesis and Structural Variation of Nanomaterials Through In Situ/Operando XAS and SAXS

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