Eco-friendly Synthesis of CRGO and CRGO/SnO₂ Nanocomposite for Photocatalytic Degradation of Methylene Green Dye

Abstract

Reduced graphene oxide (rGO) was synthesized from a simple, cost-effective, and eco-friendly method by using Capsicum annuum (CA) as reducing agent. The rGO was mixed with SnO2 to synthesize a nanocomposite. The synthesized materials were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, and UV–visible spectroscopy techniques. The SnO2-C. annuum reduced graphene oxide (CRGO) nanocomposite exhibited a photodegradation efficiency of 97.4% when employed to remove methylene green (MG) dye. The synthesized nanocomposite showed improved photodegradation ability due to its high charge transfer and separation and owing to the presence of the large surface area of the CRGO network system. Degraded water was used in the plant and animal survival study, in which the dye solution treated with CRGO nanocomposite exhibited better growth compared to that of untreated MG solution. Likewise, in the ecotoxicity study, Artemia salina and zebra fish (Danio rerio) survival was found to be enhanced with CRGO nanocomposite-treated dye solution. This finding supports the effectiveness of CRGO/SnO2 nanocomposite for the treatment of MG dye-contaminated effluent samples.

Synthesis and characterization of pristine and strontium-doped zinc oxide nanoparticles for methyl green photo-degradation application

“…Evidently, it is safe to conclude that doping is a critical parameter which may effectively vary both the structural and optical properties of ZnO nanoparticles. Interestingly, the reduction in the band gap energy is expected to enhance the photocatalytic removal of the dyes [42], since the excitation of electrons from the valance band to the conduction band utilizes considerably lower energy which may ultimately yield pronounced number of electron/hole pairs. Light-induced charge carrier's recombination characteristics of pristine and Sr-doped ZnO powdered samples have also been analyzed by Photoluminescence (PL) spectroscopy in 450-900 nm range and the spectrum is displayed in figure 6(b).…”

Visible-Light-Driven Mentha spicata L.-Mediated Ag-Doped Bi2Zr2O7 Nanocomposite for Enhanced Degradation of Organic Pollutants, Electrochemical Sensing, and Antibacterial Applications

“…The growth of green gram seeds in MB and RB dye-contaminated water was not good as compared to the control and photocatalyst-treated water. 57,58 However, the growth of green gram seeds in the control is very close to the growth of seeds in Ag-doped BZOP photocatalyst treated water. The obtained result revealed that the Ag-doped BZOP photocatalyst has great potential for the cultivation process.…”

Multiprocessing Substrates Enhanced Ta2O5/NiCo2O4 Spinel Nanocomposites for Effective Electro-/Photocatalytic and Toxicological Effects via the Caenorhabditis elegans Model

“…A seed germination assay was performed with minor modifications . The effect of degraded water on mung bean (V.…”

“…A seed germination assay was performed with minor modifications. 25 The effect of degraded water on mung bean (V. radiata) germination was studied to demonstrate the toxicity profile. V. radiata seeds were chosen because they are easy to grow and inexpensive.…”

“…Nowadays, numerous techniques are available to examine toxicity, but some methods are very difficult to handle. Interestingly, bioassays are the most consistent and suitable methods for toxicity analysis, 25 and they do not produce any pollutants that cause harm to human beings and the environment. Initially, mung bean (V. radiata) seeds were treated with the raw dye solution and the photocatalytically degraded dye solution, and water was used as the control.…”