Synthesis, characterization, and magnetic properties of Mn nanoferrites

El-Shater, R.; Shimy, H. El; Saafan, S.A.; Darwish, Moustafa A.; Zhou, Di; Труханов, А.В.; Trukhanov, S. V.; Fakhry, F.

doi:10.1016/j.jallcom.2022.166954

Cited by 118 publications

(11 citation statements)

References 72 publications

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“…The signal intensity ratios of Mn 2p 3/2 systematically vary among the different oxides of manganese. This variation can be used to distinguish the different oxide species present in MnO x [ 26 ]. The XPS wide scan survey spectrum from the 5 wt% MnO x MSAMO catalyst is shown in Figure 6 a.…”

Section: Resultsmentioning

confidence: 99%

Catalytic Oxidation Activity of NO over Mullite-Supported Amorphous Manganese Oxide Catalyst

et al. 2023

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Nitric oxide (NO) can pose a severe threat to human health and the environment. Many catalytic materials that contain noble metals can oxidize NO into NO2. Therefore, the development of a low-cost, earth-abundant, and high-performance catalytic material is essential for NO removal. In this study, mullite whiskers on a micro-scale spherical aggregate support were obtained from high-alumina coal fly ash using an acid–alkali combined extraction method. Microspherical aggregates and Mn(NO3)2 were used as the catalyst support and the precursor, respectively. A mullite-supported amorphous manganese oxide (MSAMO) catalyst was prepared by impregnation and calcination at low temperatures, in which amorphous MnOx is evenly dispersed on the surface and inside of aggregated microsphere support. The MSAMO catalyst, with a hierarchical porous structure, exhibits high catalytic performance for the oxidation of NO. The MSAMO catalyst, with a 5 wt% MnOx loading, presented satisfactory NO catalytic oxidation activity at 250 °C, with an NO conversion rate as high as 88%. Manganese exists in a mixed-valence state in amorphous MnOx, and Mn4+ provides the main active sites. The lattice oxygen and chemisorbed oxygen in amorphous MnOx participate in the catalytic oxidation of NO into NO2. This study provides insights into the effectiveness of catalytic NO removal in practical industrial coal-fired boiler flue gas. The development of high-performance MSAMO catalysts represents an important step towards the production of low-cost, earth-abundant, and easily synthesized catalytic oxidation materials.

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Section: Resultsmentioning

confidence: 99%

Catalytic Oxidation Activity of NO over Mullite-Supported Amorphous Manganese Oxide Catalyst

et al. 2023

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“…The inorganic substances that are utilized to create MIR offer a potential avenue for biomedical uses [34,35]. Additionally, it is a novel synthesis technique for producing functional material (2-6 µm mid-IR) [36,37]. It is well known that the combination of different compounds with excellent electronic properties results in new composite materials, which have sparked significant technological interest in recent years [38,39].…”

Section: Discussionmentioning

confidence: 99%

Influence of Mid-Infrared Irradiation on Amla’s (<i>Phyllanthus emblica</i>) Physicochemical Properties and Acceptability Index

Umakanthan,

Mathi,

Umadevi

et al. 2024

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Amla (<i>Phyllanthus emblica</i>), commonly known as Indian gooseberry, is highly esteemed for its nutritional and medicinal properties. It possesses a rich abundance of bioactive compounds and exhibits a wide range of health benefits, including anti-hyperlipidemic, antidiabetic, anticancerous, anti-inflammatory, hepatoprotective, and neuroprotective effects. Amla lends itself to the production of diverse value-added goods such as powder, candy, juice, soup, and oil, offering a convenient and nutritious means of incorporating this fruit into one's daily regimen. Earlier studies suggest that irradiation can have both positive and negative effects on amla, depending on the specific parameters and doses used. Therefore, the primary aim of the present study was to positively enhance the inherent characteristics of amla by employing the safe and effective 2-6 µm mid-infrared rays, thereby further augmenting its value. Our research utilized a water-based atomizer known as the 2-6µm mid-infrared radiation generating atomizer (MIRGA), which was recently developed by us. A panel of sensory experts conducted a thorough assessment of amla both before and after the application of mid-IR radiation. In addition, various analytical techniques, including FTIR, PXRD, TEM, and H1NMR, were employed to further characterize the irradiated amla. The results demonstrated that the application of mid-IR radiation positively influenced the sensory attributes of amla, enhancing its palatability. Furthermore, the findings revealed significant transformations at the atomic, bond, and compound levels. Hence, it can be inferred that the utilization of mid-IR radiation through an economical, easily accessible, and safe technology holds immense potential for elevating the quality of amla.

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“…The inorganic compounds used in the generation of MIR are a perspective for biomedical applications (Tishkevich et al, 2019;Dukenbayev et al, 2019). It is also a new synthesis method for preparation of functional material (2-6 µm mid-IR) El-Shater et al, 2022). It is well known that the combination of different compounds, which have excellent electronic properties, leads to new composite materials, which have earned great technological interest in recent years Almessiere et al, 2022).…”

Section: Methodsmentioning

confidence: 99%

Enhancement of Cement’s Compressive Strength of Concrete using Mid-Infrared Ray – A Fundamental Research

Mathi,

2024

GJRE

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Concrete is one of the most versatile material in building construction. Overall quality of cement is indicated by the compressive concrete strength of concrete (CSC). Many techniques are available to increase the CSC. As one of the technology, we irradiated the cement with mid-infrared rays and observed 38% CSC increase. This technology is economical, rapid, easy, user-friendly, can be used by manufacturer to client and in future may gain vast scope and utility in civil engineering.

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Synthesis, characterization, and magnetic properties of Mn nanoferrites

Cited by 118 publications

References 72 publications

Catalytic Oxidation Activity of NO over Mullite-Supported Amorphous Manganese Oxide Catalyst

Catalytic Oxidation Activity of NO over Mullite-Supported Amorphous Manganese Oxide Catalyst

Influence of Mid-Infrared Irradiation on Amla’s (<i>Phyllanthus emblica</i>) Physicochemical Properties and Acceptability Index

Enhancement of Cement’s Compressive Strength of Concrete using Mid-Infrared Ray – A Fundamental Research

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Synthesis, characterization, and magnetic properties of Mn nanoferrites

Cited by 118 publications

References 72 publications

Catalytic Oxidation Activity of NO over Mullite-Supported Amorphous Manganese Oxide Catalyst

Catalytic Oxidation Activity of NO over Mullite-Supported Amorphous Manganese Oxide Catalyst

Influence of Mid-Infrared Irradiation on Amla’s (&lt;i&gt;Phyllanthus emblica&lt;/i&gt;) Physicochemical Properties and Acceptability Index

Enhancement of Cement’s Compressive Strength of Concrete using Mid-Infrared Ray – A Fundamental Research

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Influence of Mid-Infrared Irradiation on Amla’s (<i>Phyllanthus emblica</i>) Physicochemical Properties and Acceptability Index