One Pot Synthesis, Surface, and Magnetic Properties of Ni–NiO@C Nanocomposites

Abstract

An entirely novel and creative technique was employed for producing magnetic Ni–NiO@C nanocomposites, and it was based on the utilization different amounts of finely ground and fully dried olive leaf powders. The resulting nanocomposites were identified and characterized by XRD, FTIR, SEM, EDS, TEM, and Raman techniques. The magnetic and surface characteristics of the composites, as it developed, were further evaluated using the Vibrating-Sample Magnetometer (VSM) and Brunauer–Emmett–Teller (BET) techniques. The results confirmed the success of preparing a Ni–NiO@C nanocomposites, each containing Ni and NiO in crystalline form. Through the morphology of the resulting composites, determined on the basis of an SEM analysis, it became clear to us that the particles were of a semi-spherical shape, with a clear grouping and a definition of their grain boundaries. Comparably, a TEM investigation demonstrated that the composites had a core–shell structure. The surface area of the investigated composites increases as the content of dried olive leaf powders increases due to a significant increase in the total pore volume. These composites illustrated low magnetism (4.874 and 8.648 emu/g) and coercivity (55.203 and 39.639 Oe) for a number of reasons, which will be explained.

Synthesis of Nickel-Based Medical Alloys via Mechanochemical Processing and Powder Metallurgy Techniques

“…The image depicted in Figure 2 showcases the densification of dental alloy pellets synthesized through the sintering of mechanically alloyed 𝑁𝑁𝑁𝑁𝑁𝑁𝑁𝑁𝑁 powder mixtures. The photograph illustrates a variety of geometrically diverse sintered bodies, indicative of the versatility of the sintering process to yield products suitable for a range of dental applications [9]. These densified bodies are the result of a carefully controlled sintering process, which not only preserves the desired shape but also ensures the metallurgical bonding of the powder particles to achieve a structure that is sufficiently robust for dental use.…”

Biosynthesis Effect of Egg White on Formation and Characteristics of NiO/NiCo2O4 Nanocomposites

“…These properties are evident from our previous work, therefore, this study is a continuation of what was studied in our research plan. Table 5 contains the magnetic properties of both the Ni/NiO and the Co/Co 3 O 4 prepared from their respective nitrates using an egg-white-based combustion method [44,45]. It is clear from this table that the magnetism results of the Ni/NiO and Co/Co 3 O 4 nanoparticles were 8.648 and 3.450 emu/g, respectively.…”