Abstract

AbstractSelenium nanoparticles (Se NPs) were fabricated with propolis hydro-alcoholic extract and six different methods, namely, hydrothermal, microwave irradiation, ultrasonication, UV radiation, self-assembling, and conventional heating. Results indicated that antioxidant activity, turbidity, pH, and brix values of the provided hydroalcoholic propolis extract were 85.8%, 2.235% a.u., 4.1, and 3.2°Bx, respectively. Gas chromatography analysis revealed that approximately 38 bioactive compounds were detected in the provided extract within 40 min of retention time, including chalcone. Results also revealed that each method had advantage in fabrication of Se NPs compared to others, but spherical Se NPs with overall appropriate physicochemical attributes of particle size (50–60 nm), polydispersity index (0.362), zeta potential (−41.8 mV), maximum broad absorption peak (321 nm), and antioxidant activity (12.4%) were synthesized using the ultrasonication method with a frequency of 20 kHz and a power of 300 W for 10 min.

Highlights

  • Selenium nanoparticles (Se NPs) were fabricated with propolis hydro-alcoholic extract and six different methods, namely, hydrothermal, microwave irradiation, ultrasonication, UV radiation, self-assembling, and conventional heating

  • 200 μL the provided propolis extract was added into 20 mL of the prepared selenium salt solutions, and for the synthesis of Se NPs, the samples were used in six different synthetic methods, namely, hydrothermal, microwave irradiation, ultrasonication, UV radiation, self-assembling, and conventional heating

  • In the self-assembling technique, colloidal solution was kept at room temperature (33°C) overnight and in conventional synthesis process, colloidal solution was placed on a magnetic heater-stirrer set at 300 rpm and 60°C for 30 min

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Summary

Introduction

Abstract: Selenium nanoparticles (Se NPs) were fabricated with propolis hydro-alcoholic extract and six different methods, namely, hydrothermal, microwave irradiation, ultrasonication, UV radiation, self-assembling, and conventional heating. The main purposes of the current study are to (i) provide hydroalcoholic propolis extract and determine its specification, (ii) produce Se NPs by propolis extract and six different heating methods, namely, microwave, ultrasonication, UV irradiation, hydrothermal, self-assembling at room temperature, and mild heating using heater and stirrer, and (iii) evaluate particle size, polydispersity index, zeta potential, and antioxidant activities of the fabricated Se NPs. 200 μL the provided propolis extract was added into 20 mL of the prepared selenium salt solutions, and for the synthesis of Se NPs, the samples were used in six different synthetic methods, namely, hydrothermal, microwave irradiation, ultrasonication, UV radiation, self-assembling, and conventional heating. In the self-assembling technique, colloidal solution was kept at room temperature (33°C) overnight and in conventional synthesis process, colloidal solution was placed on a magnetic heater-stirrer set at 300 rpm and 60°C for 30 min

Propolis extract
Synthesis of Se NPs
Statistical analysis
Specifications of propolis extract
Method
Screening of the method for Se NPs synthesis with more desirable attributes
Conclusion

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