Efficient Photocatalytic Degradation of Malachite Green in Seawater by the Hybrid of Zinc-Oxide Nanorods Grown on Three-Dimensional (3D) Reduced Graphene Oxide(RGO)/Ni Foam

Abstract

A hybrid of ZnO nanorods grown onto three-dimensional (3D) reduced graphene oxide (RGO)@Ni foam (ZnO/RGO@NF) is synthesized by a facile hydrothermal method. The as-prepared hybrid material is physically characterized by SEM, XRD, Raman, and X-ray photoelectron spectroscopy (XPS). When the as-prepared 3D hybrid is investigated as a photocatalyst, it demonstrates significant high photocatalytic activity for the degradation of methylene blue (MB), rhodamine (RhB), and mixed MB/RhB as organic dye pollutants. In addition, the practical application and the durability of the as-prepared catalyst to degradation of malachite green (MG) in seawater are firstly assessed in a continuous flow system. The catalyst shows a high degradation efficiency and stable photocatalytic activity for 5 h continuous operation, which should be a promising catalyst for the degradation of organic dyes in seawater.

Improved Photocatalytic Activity of g‐C3N4/ZnO: A Potential Direct Z‐Scheme Nanocomposite

“…Meena and coworkers have reported a similar study using EDTA, oleic acid and citric acid capped ZnO nanoparticles . High photocatalytic performance for the elimination of MG in seawater was reported using ZnO/RGO@NF under UV illumination . The reaction was carried out undersimilar experimental conditions using different amounts of catalyst for 60 min.…”

“…[15] High photocatalytic performance for the elimination of MG in seawater was reported using ZnO/ RGO@NF under UV illumination. [21] The reaction was carried out undersimilar experimental conditions using different amounts of catalyst for 60 min. From Figure 7B, it is clear that the optimum amount of catalyst that shows maximum degradation efficacy is 0.1 g. Ajay et al have reported a similar degradation study of MG using PEG capped zinc oxide nanoparticles under visible light illumination.…”

“…[20] Qing Wang et al have studied the degradation of malachite green (MG) in seawater using ZnO nanorods grown on 3D RGO/Ni foam. [21] A recent study has reported the preparation of g-C 3 N 4 /ZnO by the chemical precipitation method and was studied for the MG dye degradation. [22] However, all these reports involve lengthy and tedious preparation techniques.…”

Highly Sensitive Biosensors Based on Biomolecules and Functional Nanomaterials Depending on the Types of Nanomaterials: A Perspective Review

“…In addition to the various nanomaterials mentioned earlier, hybridization of these nanomaterials with other materials was utilized to exploit their exceptional functionality and to develop outstanding hybrid nanomaterials for application in various scientific fields [78][79][80]. The developed hybrid nanomaterials showed excellent electrochemical, plasmonic, and photoluminescent properties not present before the hybridization [81,82].…”

Fabrication and investigation on Ag nanowires/TiO2 nanosheets/graphene hybrid nanocomposite and its water treatment performance

“…It is of great significance to promote the practical application of nanomaterials to assemble macroscopic structures with nanomaterials while maintaining their original properties and interaction strength. Recently, we find that a new type of three-dimensional (3D) graphene foam can not only avoid the stack of graphene nanosheets and effectively maintain its large specific surface area but also can minimize the reflection of incident light and improve the efficiency of light utilization [25,26]. Meanwhile, it can be easily separated and recovered.…”