Structural and Morphological Studies of V2O5/MWCNTs and ZrO2/MWCNTs Composites as Photocatalysts

Abstract

The present study outlines the synthesis of transition metal oxide- (TMO-) multiwall carbon nanotubes- (MWCNTs-) based composites for photocatalytic application. MWCNTs were functionalized/purified by treating with H2SO4 and HNO3 to improve their dispersion in water. The TMOs (ZrO2, V2O5) were decorated on MWCNTs by the hydrothermal method to yield V2O5/MWCNTs and ZrO2/MWCNTs composites. Subsequently, these composites were characterized for their structural/morphological studies by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). Photocatalytic activities of TMO/MWCNTs composites were investigated by degradation phenomenon of methylene blue (MB) dye in aqueous solution. It was observed that the prepared composites best performed in the presence of H2O2 under ultraviolet irradiation. The maximum observed degradation efficiencies for ZrO2/MWCNTs and V2O5/MWCNTs were 49% and 96%, respectively.

The The Impact of Sodium Perylene-3, 4, 9, 10-Tetracarboxylate Surfactant Concentration on the Yield of Liquid Phase Exfoliated Graphene Sheets

“…This reveals that 1.0 mgmL -1 of NaPTCA surfactant was the optimal concentration to synthesise graphene. for pure graphite which corresponds to typical inorganic ions such as isothiocyanate ions (Nandiyanto, Oktiani & Ragadhita, 2019;Iqbal et al, 2021). Common pattern of graphene materials was observed at peak 1535.48 cm -1 , which attributed to C = C bond, comes from the sp 2 carbon atoms in honeycomb lattices of graphene (Sayyad, Balakrishnan & Ajayan, 2011;Hadi et al, 2018).…”

Controlled synthesis of MWCNTs/V2O5 nanocomposite by hydrothermal approach for adsorption and photodegradation processes

“…Functionalized MWCNTs were prepared according to the previous protocol with a few modifications [19]. 40 ml of (3-1) sulfuric and nitric acids were added into the pristine MWCNTs and sonicated for 3 hours to create a carboxylic group on their surface.…”

“…The bond V-O-V symmetrically stretches appeared around 563 cm -1 [23]. Nevertheless, the sharp peaks at ∼1032 cm −1 and ∼850 cm −1 indicate the V = O vibrations [26]. As shown in figure 4b, the small board peak that appeared in the pristine MWCNT/V2O5 at ∼3480 cm -1 denotes the H2O (or OH groups) adsorbing on the surface of the samples [27].…”

“…Their remarkable characteristics comprise mechanical properties, large surface area, enhanced chemical stability, and good electrical conductivity. Because of these characteristics, CNTs-based materials have been incorporated into several important applications as nanocomposites, photovoltaics, photocatalysts, chemical sensors, optical biosensors, optoelectronic, energy storage devices, and wastewater treatment [1][2][3][4]. Nanostructured transition metal oxides (TMOs) have recently gained popularity as promising nanomaterials for various applications, primarily in semiconducting electronics and catalysis.…”

“…The recent advancements in nanoscience and nanotechnology developing a facile preparation, inexpensive strategy to create multi-functional carbon materials are a significant challenge. Meanwhile, research on a growing number of nanomaterials has been created to improve catalytic characteristics, including Pd, TiO, Mo, Zn, Au, Ag, and V2O5 [1,2]. These photocatalytic materials have high chemical stability, large surface area, efficient recyclability with no subsidiary pollutants, also possess a promise for usage in various applications, including photocatalysis under visible light and adsorption [5,6].…”