Design of V2O5 Blocks Decorated with Garlic Peel Biochar Nanoparticles: A Sustainable Catalyst for the Degradation of Methyl Orange and Its Antioxidant Activity

Abstract

In this study, novel V2O5-decorated garlic peel biochar (VO/GPB) nanocomposites are prepared via the facile hydrothermal technique. As-synthesized VO/GPB is characterized by various spectroscopic and analytical techniques. The surface morphology of the as-prepared samples was predicted by SEM analysis, which shows that the block-like V2O5 was uniformly decorated on the stone-like GPB surface. The elemental mapping analysis confirms the VO/GPB composite is composed of the following elements: C, O, Na, Mg, Si, P, K, and V, without any other impurities. The photocatalytic activity of the VO/GPB nanocomposite was examined by the degradation of methyl orange (MO) under the irradiation of visible light; 84% degradation efficiency was achieved within 30 min. The reactive oxidative species (ROS) study reveals that hydroxyl and superoxide radicals play an essential role in MO degradation. Moreover, the antioxidant action of the VO/GPB nanocomposite was also investigated. From the results, the VO/GPB composite has higher antioxidant activity compared to ascorbic acid; the scavenging effect increased with increasing concentrations of VO/GPB composite until it reached 40 mg/L, where the scavenging effect was the highest at 93.86%. This study will afford innovative insights into other photocatalytic nanomaterials with effective applications in the field of photocatalytic studies with environmental compensation.

Biosynthesis of JC-La2CoO4 magnetic nanoparticles explored in catalytic and SMMs properties

“…12 b. As the resulting value nearly same at pH 4,7,9 is more favorable for the degradation of MB dye 54 , 63 .

Figure 12 ( a ) Change in the concentration of MB dye at different pH value in presence of JC-La 2 CoO 4 .

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Differences in physicochemical properties of pectin extracted from pomelo peel with different extraction techniques

“…Pectin has antioxidant activity due to the hydroxyl group of the molecule 47 . The colour of samples changes from purple to yellow when the free radicals of DPPH are scavenged by antioxidant compounds 48 . After the reaction between ABTS• + and an antioxidant, ABTS• + is converted to its non-radical form by donating an electron 43 .…”

Adsorption and bacterial performance of Nd2O3 modified Ag nanoparticles with enhanced degradation of methylene blue

“…Finally, the precipitate was dried at 70 °C for three days. During the stirring and heating process, the following reactions were predicted: Sodium hydroxide was dissolved, giving aqueous sodium cations and hydroxyl anions, as well as silver nitrate and neodymium chloride 13 . The following equations were predicted.…”

“…Fourthly, they enable a multi-electron relocation process. Lastly, they can be utilized extensively without significant reduction in their photocatalytic efficiency 13 .…”