“…It is obvious that ZnSe-XrGO has comparatively high photocatalytic activities than ZnSe. The reason is that the reduced graphene oxide (rGO) in the nanocomposite has increased the mobility of photo-generated charges [ 35 ], retarded electron-hole pair recombination resulting in high electron density and provide high surface area for interaction with dye [ 27 , 54 , 55 ], Fig. 6 UV-VIS adsorption spectral changes of 10 ppm MV solution as a function of time over (a) ZG1 (b) ZG2 (c) ZG3 under Visible light irradiation.…”
“…It is obvious that ZnSe-XrGO has comparatively high photocatalytic activities than ZnSe. The reason is that the reduced graphene oxide (rGO) in the nanocomposite has increased the mobility of photo-generated charges [ 35 ], retarded electron-hole pair recombination resulting in high electron density and provide high surface area for interaction with dye [ 27 , 54 , 55 ], Fig. 6 UV-VIS adsorption spectral changes of 10 ppm MV solution as a function of time over (a) ZG1 (b) ZG2 (c) ZG3 under Visible light irradiation.…”
“…These extremely diversified pollutants pose a stern threat to environment and general health ( Adel et al, 2022 ). As a result, there is an international effort underway to create reliable technologies that can efficiently remove toxins from the air and H 2 O. Adsorption is a rapid, low-cost, and efficient technique for removing toxins from aquatic habitats among these approaches ( Tara et al, 2021 ). Through physicochemical interactions, the contaminant (adsorbate) is bound to the nanomaterial (adsorbent) during the adsorption process.…”
Section: Removal Of Water Contaminants By Graphene-based Nanomaterialsmentioning
Water scarcity and pollution pose significant challenges to global environmental sustainability and public health. As these concerns intensify, the quest for innovative and efficient water treatment technologies becomes paramount. In recent years, graphene-based nanomaterials have emerged as frontrunners in this pursuit, showcasing exceptional properties that hold immense promise for addressing water contamination issues. Graphene, a single layer of carbon atoms arranged in a hexagonal lattice, exhibits extraordinary mechanical, electrical, and chemical properties. These inherent characteristics have led to a surge of interest in leveraging graphene derivatives, such as graphene oxide (GO), reduced graphene oxide and functionalized graphene, for water treatment applications. The ability of graphene-based nanomaterials to adsorb, catalyze, and photocatalyze contaminants makes them highly versatile in addressing diverse pollutants present in water sources. This review will delve into the synthesis methods employed for graphene-based nanomaterials and explore the structural modifications and functionalization strategies implemented to increase their pollutant removal performance in water treatment. By offering a critical analysis of existing literature and highlighting recent innovations, it will guide future research toward the rational design and optimization of graphene-based nanomaterials for water decontamination. The exploration of interdisciplinary approaches and cutting-edge technologies underscores the evolving landscape of graphene-based water treatment, fostering a path toward sustainable and scalable solutions. Overall, the authors believe that this review will serve as a valuable resource for researchers, engineers, and policymakers working toward sustainable and effective solutions for water purification.
In this study, silver nanoparticles‐doped graphene oxide (AgNPs@GO) nanocomposite was green synthesized using the extract of Curcuma longa as an effective reducing and stabilizing agent.. Characterization of AgNPs and AgNPs@GO were thoroughly examined via several analysis methods. Thereby, the results show the successful formation as well as the uniform distribution of spherical nano‐sized silver fragments on the GO surface with an average size of 21.14
±
${\pm }$
3.21 nm. The materials were then tested regarding their optical sensing for H2O2 and Hg2+. In specific, AgNPs@GO indicated a great colorimetric detection towards H2O2 and Hg2+ with a remarkably low detection limit at 0.48 and 0.158 μM, respectively. Conclusively, AgNPs@GO nanocomposite poses a high potential in application sectors of the colorimetric sensor.
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