Accelerated Decoloration of Organic Dyes from Wastewater Using Ternary Metal/g-C3N4/ZnO Nanocomposites: An Investigation of Impact of g-C3N4 Concentration and Ni and Mn Doping

Abstract

Wastewater from many sectors that contains hazardous organic pollutants exacerbates environmental contamination. Consequently, outstanding photocatalytic substances that can successfully degrade hazardous substances are needed to provide pollution-free water. From this perspective, zinc oxide/g-C3N4-based composites are desirable due to their low cost, strong reactivity, and environmental friendliness. So, in the current investigation, sequences of Mn/g-C3N4/ZnO (Mn/GZ) and Ni/g-C3N4/ZnO (Ni/GZ) nanocomposites (NCs) containing different concentrations (wt.%) of g-C3N4 were made via the co-precipitation process. The chemical makeup and morphological characteristics of the produced composites were ascertained via the techniques of transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), Fourier transform infrared (FTIR), photoluminescence (PL), and UV spectrophotometry. Methyl orange (MO) and Eriochrome Black T (EBT) dyes were used as target pollutants to assess the composite materials’ photocatalytic effectiveness. Compared to g-C3N4/ZnO and g-C3N4, the produced Mn/GZ and Ni/GZ NCs displayed better photocatalytic activity. The improved photocatalytic efficiency of the Ni/GZ and Mn/GZ NCs might be credited to synergistic interactions at the g-C3N4 and ZnO interface that result in a more efficient separation and conduction of photo-induced charges. Furthermore, the Ni/Mn atoms act as the facilitators to improve electron–hole pair separation and conduction in NCs. The nanocomposites were found to be incredibly stable, with consistently high dye decoloration efficiency over five catalytic cycles. Hence, Ni/GZ and Mn/GZ could potentially be very effective and adaptable photocatalysts for the photocatalytic decoloration of wastewater pollutants.

Highly-Efficient Ni@CuS/SGCN Nanocomposite with Superior Bifunctional Electrocatalytic Activity for Water Splitting

“…The peaks at 1235, 1403, 1455, 1540, and 1622 cm −1 represented the C 6 N 7 heptazine heterocyclic ring stretching vibration modes. 37,38 The deformation of N-H is confirmed by the broad peak at 886 cm −1 . The peaks at 3151 and 3161 are due to the H 2 O that was adsorbed, and the second is due to the amine group N−H vibration.…”

Review—Recent Advancements in Graphene-Based Electrodes for Lithium-Ion Batteries

“…48 The abundance of silicon dioxide on Earth makes it a preferable anode material compared to other silicon oxides. 61,62 Recent studies have concentrated on improving nanoparticles of silicon and their electrochemical characteristics for LIBs as anode materials by synthesizing silicon-doped graphene composites through several methods. The results of these analyses demonstrate that such composites, while being exposed to very high current densities, have much longer cycle lifetimes and increased capacity.…”

Frankincense-Based Functionalized Multiwalled Carbon Nanotubes with Iron Oxide Composites for Efficient Removal of Crystal Violet: Kinetic and Equilibrium Analysis

“…However, excessive harvesting and population growth have increased the risk of freshwater resource extinction. The rampant discharge of effluent from various industries containing synthetic dyes, such as textiles, paper, and paint, has led to significant environmental concerns in recent years. , Every year, approximately 10,000 pigments and dyes are manufactured worldwide. , Dyes, in contrast to most organic substances, can gather visible spectrum light because they have a conjugated structure. − Removing color from dye-bearing wastewater is a challenging issue since it is difficult to treat with traditional techniques. , Textile industry effluents contain harmful chemicals and dyes that can negatively impact the environment and human health. − Therefore, finding effective treatment methods is crucial for decreasing the negative effects of industrial waste production on the environment. Crystal violet (CV), a synthetic cationic dye, has extensive uses in the physical and biological sciences.…”