One-step hydrothermal microwave-assisted synthesis of LaFeO3 nanoparticles

Microwave-Assisted Synthesis of Water-Dispersible Humate-Coated Magnetite Nanoparticles: Relation of Coating Process Parameters to the Properties of Nanoparticles

“…Nevertheless, it has several well-known disadvantages, mainly a wide size distribution of prepared nanoparticles, and as a result, differences in the physical properties due to the "size effect". This limitation can be overcome by using nontraditional synthesis methods, especially, a microwave approach [18][19][20][21]. It has been shown [22] that the use of microwave irradiation during the synthesis of nanomaterials allows one to obtain nanoparticles with a narrower size distribution, to control and adjust the shape and structure of nanomaterials, to reduce synthesis duration, and to enhance the yield and crystallinity of the obtained nanoparticles.…”

Hydrothermal microwave‐assisted synthesis of LaFeO3 catalyst for N2O decomposition

“…In our earlier work, 20 a high‐efficiency microwave‐assisted methodology of perovskite LaFeO 3 synthesis was developed, however, we were not able to achieve the highest purity of samples while using diluted nitric acid to remove impurities—lanthanum hydroxide La(OH) 3 and iron oxide α‐Fe 2 O 3 . This time we improved the synthesis methodology by conducting a series of experiments to adjust the amount of each reagent in the reaction mixture.…”

“…The LFO‐MW sample was prepared via a hydrothermal reaction carried out in a microwave system Multiwave Pro by Anton Paar GmbH (Austria) by using the earlier described 20 and then the optimized procedure as follows: 20 mL of 0.4 mol/L solutions of La(NO 3 ) 3 ·6H 2 O and Fe(NO 3 ) 3 ·9H 2 O (Acros) was mixed together, then 17.2 g of KOH (90%) were added to the solution and mixed (during the KOH dissolution process, heat generated, the solution temperature was about 70°C‐80°C). The obtained colloid solution consisting of La and Fe hydroxides was cooled down to room temperature and 6 g of CO(NH 2 ) 2 was added to the colloid.…”

“…It demonstrates a noticeable acceleration of solid‐state reactions and crystallization rates, which results in an increased product yield and enhanced purity of products, as well as in a decrease of the product particle size as compared to conventional thermal synthesis 12‐19 . Earlier, we have developed a microwave‐assisted approach to synthesize the perovskite structure LaFeO 3 under mild hydrothermal conditions 20 demonstrating all the highlighted advantages. In this work, we would like to compare physical and catalytic properties of LaFeO 3 samples obtained under microwave and conventional conditions.…”

Synergistic Effect of High Irradiation Power and Antisolvent Addition for Enhanced Microwave Assisted Nanoparticle Synthesis Process

“…For example, in comparison with conventional heating methods, microwave heating produces ner particles with narrow size distribution (He, 2004) and high purity (Buttress et al, 2019) because of the higher reaction rate due to rapid volumetric heating. Consequently, operation at lower temperature (El-Naggar et al, 2016) and shorter reaction time (Kostyukhin et al, 2019;Yasnó et al, 2019) can be achieved with high productivity (Imran et al, 2019) because of the rapid synthesis. However, to e ciently enhance microwave characteristics, such as rapid and homogeneous nucleation, fast supersaturation, and short crystallization time, high microwave power is required.…”