Silver-Doped Cadmium Selenide/Graphene Oxide-Filled Cellulose Acetate Nanocomposites for Photocatalytic Degradation of Malachite Green toward Wastewater Treatment

Abstract

Silver-doped cadmium selenide/graphene oxide (GO) (Ag-CdSe/GO) nanocomposites have been synthesized, loaded in cellulose acetate (CA) to form Ag-CdSe/GO@CA heterostructure nanofibers, and characterized in terms of structural, morphological, photocatalytic properties, among others. The photocatalytic degradation of malachite green (MG) was estimated using cadmium selenide-filled CA (CdSe@CA), silver-doped cadmium selenide-filled CA (Ag-CdSe@CA), cadmium selenide/GO-filled CA (CdSe/GO@CA), and silver-doped cadmium selenide/GO-filled CA (Ag-CdSe/GO@CA) nanocomposite materials. The Ag-CdSe/GO@CA nanocomposites exhibit and retain an enhanced photocatalytic activity for the degradation of MG dye. This amended performance is associated with the multifunctional supporting impacts of GO, Ag, and CA on the composite structure and properties. The superior photocatalytic activity is related to the fact that both Ag and GO can act as electron acceptors that boost the separation efficiency of photogenerated carriers and the loading of the combined nanocomposite (Ag-CdSe@GO) on CA nanofibers, which can augment the adsorption of electrons and holes and facilitate the movement of carriers. The stability of Ag-CdSe/GO@CA nanocomposite photocatalysts demonstrates suitable results even after five recycles. This study establishes an advanced semiconductor-based hybrid nanocomposite material for efficient photocatalytic degradation of organic dyes.

Fabrication of a zinc oxide/alginate (ZnO/Alg) bionanocomposite for enhanced dye degradation and its optimization study

“…which are intensively used due to its strong absorption in the UV and visible region. [13][14][15][16][17] So far, some of the materials used as photocatalysts to remove various pollutants are TiO 2 and ZnO and has been utilized in varied elds such as catalysis, solar energy conversion, optoelectronics, and biolabeling. [18][19][20] Many areas can benet from the eco-friendly qualities of nanoscale zinc oxide, which is affordable, non-toxic, and antibacterial.…”

A type II heterojunction α-Fe2O3/g-C3N4 for the heterogeneous photo-Fenton degradation of phenol

“…Thus, constructing a composite with a suitable band energy gap is a mainstream approach to widen the light absorption region and reduce the charge recombination. [16][17][18][19][20] Graphitic carbon nitride (g-C 3 N 4 ), as a two-dimensional layered semiconductor, has drawn particular attention in photocatalysis due to its element abundance, facile preparation, great visible light activity, high thermal and outstanding chemical stabilities, and excellent electronic structure. 21 Recently, the composite photocatalysts combining a-Fe 2 O 3 and g-C 3 N 4 have been successfully fabricated and showed great performance in water splitting, 22 carbon dioxide reduction, 23 photochemical reaction, 24 and heavy metal ion reduction.…”

Highly efficient photocatalytic organic dyes degradation based on 1D magnetic Bi2Fe4O9/C@AgBr composite

“…[12][13][14] As an advanced oxidation technology, semiconductor photocatalysis has attracted extensive attention in environmental remediation due to its stability, efficiency, nontoxicity, low cost, and environmental friendliness. [15][16][17][18] Hence, it is the current research challenge and primary task to explore new visible light-driven semiconductor photocatalysts to solve water pollutants. TiO 2 as the most common semiconductor is well known for a valid decomposition of organic compounds.…”