Microwave-Assisted Hydrothermal Synthesis of Zinc-Aluminum Spinel ZnAl2O4

The drawback of the hydrothermal technique is driven by the fact that it is a time-consuming operation, which greatly impedes its commercial application. To overcome this issue, conventional hydrothermal synthesis can be improved by the implementation of microwaves, which should result in enhanced process kinetics and, at the same time, pure-phase and homogeneous products. In this study, nanometric zinc aluminate (ZnAl2O4) with a spinel structure was obtained by a hydrothermal method using microwave reactor. The average ZnAl2O4 crystallite grain size was calculated from the broadening of XRD lines. In addition, BET analysis was performed to further characterize the as-synthesized particles. The synthesized materials were also subjected to microscopic SEM and TEM observations. Based on the obtained results, we concluded that the grain sizes were in the range of 6–8 nm. The surface areas measured for the samples from the microwave reactor were 215 and 278 m2g−1.

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Rapid microwave assisted hydrothermal synthesis cerium vanadate nanoparticle and its photocatalytic and antibacterial studies

Journal of Physics and Chemistry of Solids ◽

10.1016/j.jpcs.2019.109211 ◽

2020 ◽

Vol 137 ◽

pp. 109211 ◽

Cited By ~ 4

Author(s):

S. Mishra ◽

M. Priyadarshinee ◽

A.K. Debnath ◽

K.P. Muthe ◽

B.C. Mallick ◽

...

Keyword(s):

Hydrothermal Synthesis ◽

Antibacterial Studies ◽

Microwave Assisted ◽

Cerium Vanadate

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Controlled growth of MTT zeolite by microwave-assisted hydrothermal synthesis

Focus on Catalysts ◽

10.1016/j.focat.2015.11.034 ◽

2015 ◽

Vol 2015 (12) ◽

pp. 7

Keyword(s):

Hydrothermal Synthesis ◽

Controlled Growth ◽

Microwave Assisted

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Microwave-Assisted vs. Conventional Hydrothermal Synthesis of MoS2 Nanosheets: Application towards Hydrogen Evolution Reaction

Crystals ◽

10.3390/cryst10111040 ◽

2020 ◽

Vol 10 (11) ◽

pp. 1040 ◽

Cited By ~ 1

Author(s):

Getachew Solomon ◽

Raffaello Mazzaro ◽

Vittorio Morandi ◽

Isabella Concina ◽

Alberto Vomiero

Keyword(s):

Hydrothermal Synthesis ◽

Hydrothermal Method ◽

Hydrogen Evolution ◽

Hydrogen Evolution Reaction ◽

Current Density ◽

Crystal Morphology ◽

Synthesis Method ◽

Synthesis Methods ◽

Mos2 Nanosheets ◽

Microwave Assisted

Molybdenum sulfide (MoS2) has emerged as a promising catalyst for hydrogen evolution applications. The synthesis method mainly employed is a conventional hydrothermal method. This method requires a longer time compared to other methods such as microwave synthesis methods. There is a lack of comparison of the two synthesis methods in terms of crystal morphology and its electrochemical activities. In this work, MoS2 nanosheets are synthesized using both hydrothermal (HT-MoS2) and advanced microwave methods (MW-MoS2), their crystal morphology, and catalytical efficiency towards hydrogen evolution reaction (HER) were compared. MoS2 nanosheet is obtained using microwave-assisted synthesis in a very short time (30 min) compared to the 24 h hydrothermal synthesis method. Both methods produce thin and aggregated nanosheets. However, the nanosheets synthesized by the microwave method have a less crumpled structure and smoother edges compared to the hydrothermal method. The as-prepared nanosheets are tested and used as a catalyst for hydrogen evolution results in nearly similar electrocatalytic performance. Experimental results showed that: HT-MoS2 displays a current density of 10 mA/cm2 at overpotential (−280 mV) compared to MW-MoS2 which requires −320 mV to produce a similar current density, suggesting that the HT-MoS2 more active towards hydrogen evolutions reaction.

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Preparation and Electrical Properties of Ternary Compound (PbTe)1-x(SnTe)x with Nanocrystallines

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.280-283.389 ◽

2007 ◽

Vol 280-283 ◽

pp. 389-392

Author(s):

J.L. Cui

Keyword(s):

Reaction Time ◽

Electrical Properties ◽

Solvothermal Method ◽

Similar Material ◽

Vacuum Melting ◽

Ternary Compounds ◽

Grain Sizes ◽

Pure Compounds ◽

Maximum Power Factor ◽

Synthesized Materials

Ternary compounds (PbTe)1-x(SnTe)x with nanocrystallines were synthesized at a temperature of 180oC by conventional solvothermal method. XRD analyses revealed that relatively pure compounds can be synthesized using ethylenediamine as a solvent only when a reaction time of at least 24h is applied. The XRD results are in agreement well with those from EMPA analysis. The grain sizes of the materials, ranging from 50~70nm, are slowly increased with reaction time. Measurements showed that the maximum power factor of about 6.0×10-4 W.m.K-2 for the synthesized materials are higher than that of similar material prepared by vacuum melting.

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Microwave Assisted Hydrothermal Synthesis and Structural Characterization of TiO2 Nanotubes

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2015.10589 ◽

2015 ◽

Vol 15 (9) ◽

pp. 7391-7394 ◽

Cited By ~ 3

Author(s):

Sung Hun Cho ◽

Rajesh Adhikari ◽

Seung Ho Kim ◽

Tae Ho Kim ◽

Soo Wohn Lee

Keyword(s):

Hydrothermal Synthesis ◽

Structural Characterization ◽

Tio2 Nanotubes ◽

Microwave Assisted

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Rapid microwave assisted hydrothermal synthesis of porous α-Fe2O3 nanostructures as stable and high capacity negative electrode for lithium and sodium ion batteries

RSC Advances ◽

10.1039/c5ra03238e ◽

2015 ◽

Vol 5 (44) ◽

pp. 34761-34768 ◽

Cited By ~ 32

Author(s):

B. Nageswara Rao ◽

P. Ramesh Kumar ◽

O. Padmaraj ◽

M. Venkateswarlu ◽

N. Satyanarayana

Keyword(s):

Hydrothermal Synthesis ◽

Hydrothermal Method ◽

High Capacity ◽

Negative Electrode ◽

Sodium Ion ◽

Sodium Ion Batteries ◽

Base Catalyst ◽

Microwave Assisted

Porous α-Fe2O3 nanostructures were developed in the presence of a base catalyst by a rapid microwave assisted hydrothermal method.

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Spinel Zn3V3O8 nanosheets via one - step hydrothermal synthesis with peroxidase-like activity for high-sensitive glucose colorimetric detection in synthetic perspiration

Journal of Materials Chemistry B ◽

10.1039/d1tb00608h ◽

2021 ◽

Author(s):

Guizeng Yang ◽

Yi Lu ◽

Yi Li ◽

Meihui Ying ◽

Haibo Pan ◽

...

Keyword(s):

Hydrothermal Synthesis ◽

Spinel Structure ◽

Colorimetric Detection ◽

Ternary Oxide ◽

Exposed Surface ◽

Catalytic Sites ◽

One Step

Due to the specific spinel structure, ternary oxide with multi-catalytic sites at high-active exposed surface is recommended to an alternative bio-catalyst. Spinel zinc vanadate with two- dimentional nanosheets (Zn3V3O8 NSs)...

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