Ultrasonic and microwave assisted extraction as rapid and efficient techniques for plant mediated synthesis of quantum dots: green synthesis, characterization of zinc telluride and comparison study of some biological activities

Abstract

In this study, a simple, rapid, and efficient plant-mediated green approach was presented for the synthesis of stable and ultra-small zinc telluride quantum dots (ZnTe QDs) using the aqueous extract of the Ficus johannis plant.

Effects of Microwave-Assisted Opuntia humifusa Extract in Inhibiting the Impacts of Particulate Matter on Human Keratinocyte Skin Cell

“…It was supposed that it was the viscosity reduction that allowed MA-OHE to be able to release antioxidant compounds, which resulted in a higher antioxidant activity for MA-OHE, compared with raw O. humifusa. Moreover, it was demonstrated that the plant extract-based CDs prepared by the microwave-assisted process had low toxicity [22]. Overall, the microwave-assisted extraction method helped to maintain nutrition, improve texture and appearance, and reduce viscosity relative to the conventional extraction methods.…”

“…In addition, the cytotoxicity results indicated that MA-OHE possessed greater biocompatibility than did the raw O. humifusa, slightly reducing the cell survival of HaCaT cells from 87.47 ± 1.60 and 80.88 ± 4.84% after 24 h treatment at 100 µg/mL. A possible explanation was that under high-temperature and high-energy treatment, the raw O. humifusa was transformed into carbon dots (CDs) [22] and significantly reduced the viscosity. It was supposed that it was the viscosity reduction that allowed MA-OHE to be able to release antioxidant compounds, which resulted in a higher antioxidant activity for MA-OHE, compared with raw O. humifusa.…”

“…The domestic microwave oven (Magic MMO-20M7) utilized in this study possessed a total capacity of 800 W. The MA-OHE process was conducted according to the method of Alvand et al (2019) with some modifications (Figure 1) [22]. The raw O. humifusa with very high viscosity was irradiated with microwaves (800 W power) for 10 min.…”

Metal Cation Valency Dependence in Morphology Evolution of Cu2−xS Nanodisk Seeds and Their Pseudomorphic Cation Exchanges

“…The properties of colloidal inorganic nanoparticles (NPs) including catalytic, electronic, optical, and magnetic performances are greatly affected by their morphologies, suggesting opportunities for enabling applications, which are not possible by poorly defined or bulk materials [1–5] . In recent years, the morphology and according properties of Zn– and Cd–chalcogenide compositions have been exploited and rationalized [6–15] . Nevertheless, their further development into particular applications are somewhat limited by the concerns of fabrication technique for complex (hetero)structures.…”

“…[1][2][3][4][5] In recent years, the morphologya nd according properties of Zn-and Cd-chalcogenide compositions have been exploited and rationalized. [6][7][8][9][10][11][12][13][14][15] Nevertheless, their furtherd evelopment into particular applications are somewhat limited by the concerns of fabrication technique for complex (hetero)structures. To circumvent this obstacle, an attractive alternative strategy is cation exchange (CE).…”