Green fabrication of graphene quantum dots from cotton with CaSiO3 nanostructure and enhanced photocatalytic performance for water treatment

Perovskite nanostructures have become one of the most alluring classes of materials because of their structure and properties, which have revolutionized many areas of electronics, optoelectronics, and photonics. In this research, CaSiO3 nanostructures have been prepared by hydrothermal synthesis as profitable and light-active materials for photocatalytic activities. The photocatalytic procedure is an eco-friendly method, which is recognized as an effective alternative for the degradation of multiple hazardous materials. In this regard, photocatalytic properties of oxide perovskite have been developed by effective incorporation of CaSiO3 nanostructures with graphene quantum dots (GQDs) under facile green low-cost hydrothermal conditions. The impact of two factors, including diverse varieties of surfactants and concentration of GQDs, was surveyed through XRD, FESEM images, and diffuse reflectance spectroscopy (DRS) on purity, structure, and photocatalytic performance. The results demonstrated that the CaSiO3/GQDs in high-level concentration showed higher visible-light photocatalytic activity. Besides, the kinetics of photocatalytic reactions was investigated, and the outcomes showed that higher photocatalytic performance possessed a higher reaction rate coefficient. (c) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Automated summary

In this research, CaSiO3 nanostructures were synthesized by hydrothermal method and combined with graphene quantum dots (GQDs) to develop oxide perovskite materials with good photocatalytic performance. The results showed that the CaSiO3/GQDs samples with high concentration exhibited higher visible-light photocatalytic activity.