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L. Renuka

Bio: L. Renuka is an academic researcher from Rajalakshmi Engineering College. The author has contributed to research in topics: Photocatalysis & Nanocomposite. The author has an hindex of 9, co-authored 23 publications receiving 417 citations. Previous affiliations of L. Renuka include Center for Advanced Materials & Dayananda Sagar College of Engineering.

Papers
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TL;DR: In this paper, the effect of Mg doping and Aloe Vera gel concentration on phase formation, morphology and optical properties of the nanoparticles were investigated for the degradation of Rhodamine B under UV light.

93 citations

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TL;DR: In this paper, a green route method for the effective reduction of graphene oxide using Cinnamon extract was reported. And the structural properties of the prepared NC had been characterized using PXRD, SEM, TEM, Raman, PL and XPS analysis.
Abstract: We report a green route method for the effective reduction of graphene oxide using Cinnamon extract. ZrO2 nanomaterial synthesized via facile green induced method and zirconia–reduced graphene oxide nanocomposite (NC) synthesized by reflux method. The structural properties of the prepared NC had been characterized using PXRD, SEM, TEM, Raman, PL and XPS analysis. Further, the excellent photocatalytic properties of NC for the decomposition of reactive blue 4 compared to commercial P25 can be attributed to its excellent electrical properties and well connected arrangement derived from the structural reward of the ZrO2 and rGO support. This results in significant electron-acceptor/transport of graphene materials that effectively decrease the photo-generated electron–hole recombination thereby enhancing the absorption of light. It opens new window to use this eco-friendly, simple and low cost method to synthesize reduced graphene-based composite materials.

88 citations

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TL;DR: In this article, the spinel CuFe 2 O 4, ZnFe 2O 4 and NiFe 2 o 4 were synthesized by simple solution combustion synthesis (SCS) and characterized by powder X-ray diffraction (PXRD), Fourier Transform Infrared Spectroscopy (FTIR), UV-Visible Spectrogram and Scanning Electron Microscopy (SEM).

85 citations

Journal ArticleDOI
TL;DR: A facile solution combustion synthesis has been adopted to synthesize ZrO2/CuO nanocomposite oxides (NCO) by utilizing Oxalyl dihydrazide (ODH) as fuel as mentioned in this paper.
Abstract: A facile solution combustion synthesis has been adopted to synthesize ZrO2/CuO nanocomposite oxides (NCO’s) by utilizing Oxalyl dihydrazide (ODH) as fuel. The X-ray diffraction patterns and TEM analysis reveals the presence of cubic ZrO2 and CuO in ZrO2/CuO NCO’s. The NCO’s synthesized by simple, fast, highly sensitive and low-cost method is found to be an alternate to traditional luminescent powders for the detection and enhancement of finger marks in a broad range of surfaces. The photoluminescence analysis indicates that the present NCO is an effective blue component in display applications. The synthesized ZrO2/CuO (2:1) composite exhibited excellent photocatalytic activity towards the degradation of various dyes under Sunlight. In particular, Indigo carmine dye was chosen to explore the photocatalytic performance of prepared NCO’s under Sunlight illumination. It was found that ZrO2:CuO (2:1) NCO showed enhanced photocatalytic activity of 97% which was found to be 3.3 times 2.4 times and 1.5 times higher than that of pure ZrO2, CuO and commercial P25. This can be mainly attributed to the balance between the parameters, band gap, nature of morphology, crystallite size, defects and surface area which causes a slow electron-hole pair recombination rate with fast electron transfer ability. It opens new window to use this simple method to synthesize multifunctional character ZrO2-based composite materials in the area of photocatalysis particularly waste water treatment, display applications as well as a labeling agent to enhance latent fingerprints.

83 citations

Journal ArticleDOI
TL;DR: In this paper, the photocatalytic activity and photoluminescence properties of the calcined ZrO2 nanaooxides were characterized by powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), brunauer-Emmett-Teller (BET), electron paramagnetic resonance (EPR), and UV-Visible spectrophotometry analysis (UV-Vis).

54 citations


Cited by
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TL;DR: In this review, biogenic synthesis of zinc oxide (ZnO) NPs, procedures of syntheses, mechanism of formation and their various applications have been discussed.
Abstract: Nanotechnology is emerging as an important area of research with its tremendous applications in all fields of science, engineering, medicine, pharmacy, etc. It involves the materials and their applications having one dimension in the range of 1-100nm. Generally, various techniques are used for syntheses of nanoparticles (NPs) viz. laser ablation, chemical reduction, milling, sputtering, etc. These conventional techniques e.g. chemical reduction method, in which various hazardous chemicals are used for the synthesis of NPs later become liable for innumerable health risks due to their toxicity and endangering serious concerns for environment, while other approaches are expensive, need high energy for the synthesis of NPs. However, biogenic synthesis method to produce NPs is eco-friendly and free of chemical contaminants for biological applications where purity is of concerns. In biological method, different biological entities such as extract, enzymes or proteins of a natural product are used to reduce and stabilised formation of NPs. The nature of these biological entities also influence the structure, shape, size and morphology of synthesized NPs. In this review, biogenic synthesis of zinc oxide (ZnO) NPs, procedures of syntheses, mechanism of formation and their various applications have been discussed. Various entities such as proteins, enzymes, phytochemicals, etc. available in the natural reductants are responsible for synthesis of ZnO NPs.

368 citations

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TL;DR: Comparative experiments including varying the pH of the solution and the content of titania demonstrated that the 5% TiO2/ZrO2 composites (nTi:nZr = 5:100) at pH’s 10.3 possessed the best photocatalytic property.

222 citations

Journal ArticleDOI
TL;DR: This review delineates the pros and cons and critical issues pertaining to the deployment of these nanomaterials endowed with their superior surface area, mechanical properties, significant chemical reactivity, and cost-effectiveness with low energy consumption for removal of hazardous materials and contaminants from water.

217 citations

Journal ArticleDOI
TL;DR: In this paper, the authors reviewed the recent advances in a photocatalytic application of spinel ferrite nanoparticles and their nanocomposites towards pollutant degradation capacities in wastewater, with more emphasis on their novelties.

198 citations

Journal ArticleDOI
TL;DR: The present review focuses on different techniques for synthesis of MnZn ferrites in literature, their characterization tools, effect of doping on the properties of Mn Zn ferrite and finally about their applications.

184 citations