Investigation of EG-Bi2S3 nanorods photocatalytic activity under visible light for dye degradation from aquatic system.

Autor: Keerthana, Subramanian, Yuvakkumar, Rathinam, Kumar, Ponnnusamy Senthil, Ravi, Ganesan, Velauthapillai, Dhayalan, Vo, Dai-Viet Nguyen
Předmět:
Zdroj: Environmental Science & Pollution Research; Jun2023, Vol. 30 Issue 28, p71628-71636, 9p
Abstrakt: Bi2S3, 5 ml EG-Bi2S3, and 10 ml EG-Bi2S3 were synthesized by employing solvothermal route. X-ray diffraction, UV-vis absorption, photoluminescence, Raman, scanning electron microscopic studies confirmed the structural, optical, morphological behaviors. The XRD pattern of Bi2S3, 5 ml EG-Bi2S3, and 10 ml EG-Bi2S3 was correlated well with JCPDS # 65-2435. The crystallite size was found to be 57, 49, and 40 nm. The photoluminescence spectra showed semiconducting property of prepared Bi2S3, 5 ml EG-Bi2S3, and 10 ml EG-Bi2S3. The absorption spectra of Bi2S3, 5 ml EG-Bi2S3, and 10 ml EG-Bi2S3 nanorods were well matched with the spectra of a previous report. The bandgap values of Bi2S3, 5 ml EG-Bi2S3, and 10 ml EG-Bi2S3 were calculated to be 1.56, 1.45, and 1.3 eV in reducing order. The morphology of Bi2S3, 5 ml EG-Bi2S3, and 10 ml EG-Bi2S3 samples showed the development of nanorods. The 10 ml EG-Bi2S3 sample showed better development of nanorods with the addition of ethylene glycol. The agglomeration was considerably reduced with the mixing of solvent. Bi2S3, 5 ml EG-Bi2S3, and 10 ml EG-Bi2S3 catalysts were added to the methylene blue dye solution and its photocatalytic properties were investigated by reducing toxic pollutants under light. The 10 ml EG-Bi2S3 sample with neutral pH and 0.1 g of catalyst was added and investigated which showed 86% of efficiency towards dye degradation. The narrow bandgap, defined morphology of 10 ml EG-Bi2S3, made a positive result towards efficient photocatalytic activity. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index