Microwave-assisted Bi2Se3 nanoparticles using various organic solvents

• Bi2Se3 nanoparticles were synthesized using the microwave method at 110 °C for 20 min.
• Among the different solvents, N2H4 + H2O + Ethanol produced pure rhombohedral Bi2Se3.
• N2H4 + H2O + Ethanol treated sample shows higher optical absorption.
• It has a small band gap energy of 1.5 eV.
• Grain size of N2H4 + H2O + Ethanol treated sample is found to be 200 nm.

Microwave assisted Bi2Se3 nanoparticles were synthesized from five different solvents DMF, EG, EG + H2O, EDA + dil.HNO3 and N2H4 + H2O + Ethanol. The influence of solvents on purity of the compound was analysed by using X-ray diffraction patterns. The result indicates pure rhombohedral Bi2Se3 nanoparticles formed for N2H4 + H2O + Ethanol. The presence of vibrational bands in the range of 400–800 cm− 1 is confirmed the formation of Bi2Se3. The maximum optical absorption observed around 450 nm and the band gap values are found in the range of 1.5 eV–2.17 eV for all the solvents. The nanostructure of the Bi2Se3 particles change with solvents. From the experimental results, the solvent N2H4 + H2O + Ethanol produces pure nanosize Bi2Se3 particles under the microwave assisted method.

Bi2Se3 nanoparticles have been prepared by the microwave-assisted solvothermal method using various solvents DMF, EG, EG + H2O, EDA + dil.HNO3 and N2H4 + H2O + Ethanol and its structural, functional, optical and morphological properties were investigated.Figure optionsDownload as PowerPoint slide