Facile synthesis of hydroxyapatite nanoparticles from eggshell biowaste using Azadirachta indica extract as a green template

Abstract

In this study, Hydroxyapatite nanoparticles (HANPs) were successfully synthesized from eggshell waste by microwave-assisted (MW) as well as conventional heating precipitation methods and a green template i.e., Azadirachta Indica (AI)...

Feasibility Insights of the Green-Assisted Calcium-Phosphate Coating on Biodegradable Zinc Alloys for Biomedical Application: In Vitro and In Vivo Studies

“…The spectrum related to the C 1s consists of C–C, C–H, C–O, C–OH, and C–O–C bonds (Figure d4). These results are consistent with other reported literature . The full survey spectrum and the high-resolution narrow scan spectrum confirm the presence of brushite/HAp coating over the Zn-alloy surface.…”

“…It can be inferred that the presence of neem in the solution primarily modulates the coating morphology and texture and enhances the coating deposition to some extent. The polyphenols in neem-assisted coating enhance the hindrance and static repulsion force, resulting in uniform deposition, as reported by Upadhyay et al . Several researchers assessed that proteins and peptides have a significant role in the formation and growth of Ca/P or HAp coating by affecting the cathodic reaction during the electrochemical process, ultimately changing the pH value of the solution. , Hence, the presence of neem facilitates the uniform deposition of crystals and ultimately grows to flakes.…”

“…It also acts as a great stabilizer by refining the microstructure of the coating. Azadirachta indica, also known as neem, belongs to the Meliaceae family and contains several critical constituents such as azadirachtin, nimbidin, nimbolinin, nimbin, gedunin, nimbidol, sodium nimbinate quercetin, and salannin. , The essential phytochemicals of terpenoids and flavanones present in neem are responsible for antioxidant, antifungal, and antiviral reactions . Various researchers reported the effect of the use of different plant extracts in hydroxyapatite deposition …”

Recent Advances in Wastewater Treatment by Utilisation of Bio-waste-derived Hydroxyapatite

“…[11][12][13][14] Bio-derived functional materials have different application areas, such as separation processes, drug delivery or tissue engineering applications, development of energy storage devices, and environmental remediation studies. [15][16][17][18][19][20] Development of these bio-derived functional materials for various applications would provide environmentally friendly protection advantages.…”