Optimization of the calcination temperature for the solvent-deficient synthesis of nanocrystalline gamma-alumina

Ivas, Toni; Balaban, Milica; Dosen, Vedrana; Miyawaki, Jin; Ito, Kazuki; Vranković, Dragoljub; Ostojić, Gordana; Zeljković, Saša

doi:10.1007/s11696-018-0637-x

Cited by 7 publications

(7 citation statements)

References 20 publications

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“…This simple but amazing material is found to emerge from the boehmite phase with temperature-related structural defects. The diffusion-controlled transition from boehmite to γ-Al 2 O 3 is additionally followed by Ivas et al [12]. This research followed up on γ-Al 2 O 3 densification and crystal growth controlled by calcination temperature.…”

Section: Binary Metal Oxidesmentioning

confidence: 91%

“…The mechanism of γ-Al 2 O 3 thermal stabilization by dopants is still not well understood but recently there is a new approach based on SD synthesis. Smith et al [14] [12] with the La 3+ to stabilize the γ-phase at higher temperatures. The applied one-pot SD method resulted in a radical reduction of La-doped γ-Al 2 O 3 nanoparticles preparation time (3h vs. 3 days for impregnation methods), and a high level of La utilization.…”

Section: Binary Metal Oxidesmentioning

confidence: 99%

“…XRD of the Al 2 O 3 powders prepared by solvent deficient method and calcined at 300 (a), 400 (b), 500 (c), and 600 °C (d) with marked peaks of γ-Al 2 O 3 (red) and AlOOH (blue) phase. Chemical transformation is found tobe gradual and results in nano-sized powder[12]…”

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confidence: 99%

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A Review of Recent Development of the Solvent-Deficient Method

Zeljković

2022

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The challenges of modern society and the requirements for high-tech materials have led to a new stage in the development of chemical synthesis methods. This stage is demanding a reliable, controllable, and green approach to the production of necessary materials. One of the recently developed approaches for metal oxide nanoparticles synthesis is the solvent deficient method. A cutting edge of this synthetic method is a synthesis with increased control throughout chemical transformation resulting in optimal conditions for materials production. As a result, oxide nanoparticles are produced fast, environmentally friendly, cost-effective, and with low energy consumption. On the other hand, a complex reaction mechanism is presenting a challenge for reliable kinetic studies. The present review follows the recent trends in the development of the solvent deficient method concerning the binary, ternary, and complex metal oxides. Special attention is given to considering approaches responsible for desirable mechanisms of catalytic applications. In future development, the reported synthesis method is expected to be employed in a high entropy oxides formation. Due to simple preparation steps, it will be possible to automatize the reaction procedure and investigate a large number of possible compositions which is imperative for new complex materials. Finally, precursors heating could be transformed from conventional to microwave. Solvent-deficient method deals with precursors sensitive to microwave irradiation which could ensure rapid heating and transformation to desirable oxide nanomaterials.

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Section: Binary Metal Oxidesmentioning

confidence: 91%

Section: Binary Metal Oxidesmentioning

confidence: 99%

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A Review of Recent Development of the Solvent-Deficient Method

Zeljković

2022

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“…45 Nano-sized alumina was synthesized by Ivas et al using a cost-effective, solvent-free method, employing aluminum nitrate and ammonium bicarbonate as precursors. 46 XRD analysis revealed that the γ-Al 2 O 3 phase was already formed at 300 °C. The nanocrystalline size ranged from 1.5 to 1.9 nm and exhibited slow growth with increasing temperature, indicating a diffusion-controlled reaction.…”

Section: Morphology Control Of Alumina and Its Influence On Propertiesmentioning

confidence: 99%

Advances in morphology-controlled alumina and its supported Pd catalysts: synthesis and applications

Yang,

Miao,

Wang

et al. 2024

Chem. Soc. Rev.

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“…The solventdeficient method does not require complicated apparatus or setups. After the first report by Smith et al [10], this method was optimized and applied for the preparation of binary oxides such as Al2O3 [11], and CeO2 [12], and even more complex ones, such as Ba0.5Sr0.5Co0.8Fe0.2O3 [13].…”

Section: Introductionmentioning

confidence: 99%

MECHANOCHEMICALLY INDUCED SYNTHESIS OF La2O3

Zeljković

Malinović

Sukur

et al. 2021

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Lanthanum(III)-oxide (La2O3) powders were synthesized by a mechanochemically induced solvent-deficient method using lanthanum nitrate, and ammonium bicarbonate as precursors. The precursor mixture was calcined for one hour at either 600 or 800 °C. This study included an investigation of the formation reactions, crystal structure, specific surface area, and optical properties of synthesized La2O3. The proposed mechanism indicates a complex synthesis with several reactions, some of which are mechanochemically induced. The size of the La2O3 nanocrystallites, as determined by XRD, is 22.15±3.9 nm (by using the Williamson-Hall plot, it is determined that the strain is 1.4×10−3 and crystallite size 30.81 nm) while the specific surface is set to 7.04 m2g-1. The direct bandgap value obtained from reflectance measurement is determined to be 5.37 eV.

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Optimization of the calcination temperature for the solvent-deficient synthesis of nanocrystalline gamma-alumina

Cited by 7 publications

References 20 publications

A Review of Recent Development of the Solvent-Deficient Method

A Review of Recent Development of the Solvent-Deficient Method

Advances in morphology-controlled alumina and its supported Pd catalysts: synthesis and applications

MECHANOCHEMICALLY INDUCED SYNTHESIS OF La2O3

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