Fabrication of novel flower-like Sr3(VO4)2 anchored on g-C3N4: Visible-light-triggered degradation of organic contaminants K. Leeladevi, M. Arunpandian, J. Vinoth Kumar, Jeong-Won Lee, E. R. Nagarajan International Journal of Environmental Analytical Chemistry, 2024 Herein, designing of sustainable flower-like novel Sr3(VO4)2/g-C3N4 (SrVO/CN) nanocatalyst was successfully fabricated by easier hydrothermal method and utilised as a visible-light-driven for the degradation of methylene blue (MB) dye and ciprofloxacin (CF) antibiotic for the first time. The physicochemical behaviour of the nanocomposite was confirmed by various analytical techniques. These results confirm the successive development of flower-like Sr3(VO4)2 anchored on the g-C3N4 layer. The SrVO/CN can serve as an excellent catalyst for the decomposition of MB dyes and CF drugs under visible light irradiation. The results from UV-Vis spectroscopy evidently showed that the catalytic efficiency of SrVO/CN nanocomposite is higher than pure Sr3(VO4)2 nano-flowers. The SrVO/CN nanocomposite explores degradation efficiency of about 88.20% and 92.50% for MB and CF drug respectively. Furthermore, the stability and recycle behaviour of the SrVO/CN nanocomposites exhibit excellent effects. Hence, as prepared SrVO/CN behave as an example of the ‘Killing of two birds with one arrow’ approach.
Design of V2O5 Blocks Decorated with Garlic Peel Biochar Nanoparticles: A Sustainable Catalyst for the Degradation of Methyl Orange and Its Antioxidant Activity Perumal Sarojini, Karuppasamy Leeladevi, Thavuduraj Kavitha, Krishnamoorthy Gurushankar, Ganesan Sriram, Tae Hwan Oh, Karthik Kannan Materials, 2023 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.
