Enhanced photocatalytic activity in ZnO nanoparticles developed using novel Lepidagathis ananthapuramensis leaf extract

The present study focuses on the green synthesis of zinc oxide nanoparticles (ZnO NPs) using a novel Lepidagathis ananthapuramensis (LA) leaf extract and a systematic study on the photocatalytic degradation of methylene blue (MB) dye. The structural, thermal, morphological, optical, and surface area analysis of prepared ZnO NPs were examined using X-ray diffraction (XRD), UV-visible spectroscopy, Raman spectroscopy, Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller (BET) analysis, thermogravimetric analysis (TGA), field emission-scanning electron microscopy (FE-SEM), energy dispersive X-ray analysis (EDAX) and high-resolution transmission electron microscopy (HR-TEM). The LA stabilised ZnO NPs produced NPs with diverse morphologies, low band gap and cost-effective high yield of production. A systematic study has been carried out to determine the crystallinity and crystallite size of ZnO NPs based on the concentration of Zn(NO3)2 precursor, concentration of LA leaf extract, calcination temperature and calcination time. The crystallinity and crystallite size of ZnO NPs were evaluated based on the XRD technique. The photocatalytic activity of ZnO NPs was thoroughly investigated for the degradation of MB dye based on various physicochemical parameters such as reaction time, concentration of catalyst, concentration of precursors, concentration of LA extract, concentration of MB, calcination temperature and calcination time. These systematic photocatalytic studies followed green protocols and provided an excellent photocatalytic efficiency result of 96–98.5% towards the decomposition of MB. Hence, this material can work as a potential candidate for waste water treatment by also degrading other toxic dyes.

[1]  A. Chanda,et al.  Effects of Calcinations Temperatures on Structural, optical and magnetic properties of MgO nanoflakes and its photocatalytic applications , 2022, Optical Materials.

[2]  A. Kar,et al.  Influence of catalyst loading on photocatalytic degradation efficiency of CTAB-assisted TiO2 photocatalyst towards methylene blue dye solution , 2022, Bulletin of Materials Science.

[3]  F. Menaa,et al.  Green Synthesis, Structural Characterization and Photocatalytic Applications of ZnO Nanoconjugates Using Heliotropium indicum , 2021, Catalysts.

[4]  H. Cherif-Silini,et al.  Diversity of Synthetic Dyes from Textile Industries, Discharge Impacts and Treatment Methods , 2021, Applied Sciences.

[5]  S. Wacławek,et al.  Cinnamomum tamala Leaf Extract Stabilized Zinc Oxide Nanoparticles: A Promising Photocatalyst for Methylene Blue Degradation , 2021, Nanomaterials.

[6]  Vikram Pandit,et al.  Two- and three-dimensional zinc oxide nanostructures and its photocatalytic dye degradation performance study , 2021, Journal of Materials Research.

[7]  S. Faisal,et al.  Green Synthesis of Zinc Oxide (ZnO) Nanoparticles Using Aqueous Fruit Extracts of Myristica fragrans: Their Characterizations and Biological and Environmental Applications , 2021, ACS omega.

[8]  S. L. Prabu,et al.  Green synthesis of zinc oxide nanoparticles using leaf extracts of Raphanus sativus var. Longipinnatus and evaluation of their anticancer property in A549 cell lines , 2021, Biotechnology reports.

[9]  B. Arun,et al.  Tailoring the NIR range optical absorption, band-gap narrowing and ferromagnetic response in defect modulated TiO2 nanocrystals by varying the annealing conditions , 2021 .

[10]  Yanlong Gu,et al.  Green Synthesis of Metallic Nanoparticles and Their Potential Applications to Treat Cancer , 2020, Frontiers in Chemistry.

[11]  B. Gonfa,et al.  Synthesis of Zinc Oxide Nanoparticles Using Leaf Extract of Lippia adoensis (Koseret) and Evaluation of Its Antibacterial Activity , 2020, Journal of Chemistry.

[12]  Sindhu Arya,et al.  Lepidagathis ananthapuramensis (Acanthaceae): a new species from the lateritic plateaus of Kerala, India , 2020 .

[13]  Milena P. Dojcinovic,et al.  Photocatalytic degradation of methylene blue under natural sunlight using iron titanate nanoparticles prepared by a modified sol–gel method , 2020, Royal Society Open Science.

[14]  U. Aslam,et al.  Green route to synthesize Zinc Oxide Nanoparticles using leaf extracts of Cassia fistula and Melia azadarach and their antibacterial potential , 2020, Scientific Reports.

[15]  C. Bittencourt,et al.  Synthesis of Zinc Oxide Nanoparticles by Ecofriendly Routes: Adsorbent for Copper Removal From Wastewater , 2020, Frontiers in Chemistry.

[16]  M. Ara,et al.  Preparation and Characterization of Zinc Oxide Nanoparticles Using Leaf Extract of Sambucus ebulus , 2020, Applied Sciences.

[17]  M. Sudeep,et al.  Photo-assisted mineralisation of titan yellow dye using ZnO nanorods synthesised via environmental benign route , 2020, SN Applied Sciences.

[18]  B. Shivaraj,et al.  Engineering the MxZn1−xO (M = Al3+, Fe3+, Cr3+) nanoparticles for visible light-assisted catalytic mineralization of methylene blue dye using Taguchi design , 2020, Chemical Papers.

[19]  A. Castro-Beltrán,et al.  Study on the effect of the concentration of Hibiscus sabdariffa extract on the green synthesis of ZnO nanoparticles , 2019 .

[20]  E. Ebenso,et al.  Green synthesis of ZnO nanoparticles using aqueous Brassica oleracea L. var. italica and the photocatalytic activity , 2019, Green Chemistry Letters and Reviews.

[21]  S. Nayak,et al.  Correlation between calcination temperature and optical parameter of zinc oxide (ZnO) nanoparticles , 2019, Journal of Sol-Gel Science and Technology.

[22]  B. Shivaraj,et al.  Optimization of parameters for maximizing photocatalytic behaviour of Zn1-xFexO nanoparticles for methyl orange degradation using Taguchi and Grey relational analysis Approach , 2019, Materials Today Chemistry.

[23]  K. Jagadish,et al.  Comparative Study on the Effects of Surface Area, Conduction Band and Valence Band Positions on the Photocatalytic Activity of ZnO-MxOy Heterostructures , 2019, Journal of Water Resource and Protection.

[24]  A. Vázquez-Durán,et al.  Nanoscale Zinc Oxide Particles for Improving the Physiological and Sanitary Quality of a Mexican Landrace of Red Maize , 2018, Nanomaterials.

[25]  M. Maaza,et al.  Synthesis and characterization of ZnO–CuO nanocomposites powder by modified perfume spray pyrolysis method and its antimicrobial investigation , 2018 .

[26]  M. Mohamed,et al.  New insight into self-modified surfaces with defect-rich rutile TiO2 as a visible-light-driven photocatalyst , 2017 .

[27]  M. Chandraprabha,et al.  Hazard free green synthesis of ZnO nano-photo-catalyst using Artocarpus Heterophyllus leaf extract for the degradation of Congo red dye in water treatment applications , 2017 .

[28]  G. Pazour,et al.  Ror2 signaling regulates Golgi structure and transport through IFT20 for tumor invasiveness , 2017, Scientific Reports.

[29]  Z. Yaakob,et al.  Facile Synthesis of Quasi Spherical ZnO Nanoparticles with Excellent Photocatalytic Activity , 2015, Journal of Cluster Science.

[30]  F. Saleemi,et al.  Effect of calcination temperature on the properties of ZnO nanoparticles , 2015 .

[31]  J. Jiménez,et al.  Non-radiative recombination centres in catalyst-free ZnO nanorods grown by atmospheric-metal organic chemical vapour deposition , 2013 .

[32]  A. R. Daud,et al.  XPS and optical studies of different morphologies of ZnO nanostructures prepared by microwave methods , 2013 .

[33]  M. Stefan,et al.  Magnetic defects in crystalline Zn(OH)2 and nanocrystalline ZnO resulting from its thermal decomposition , 2013 .

[34]  F. Friedrich,et al.  Resonant Raman scattering in hydrogen and nitrogen doped ZnO , 2007 .

[35]  Xueqin Liu,et al.  Influence of post-annealing treatment on the structure properties of ZnO films , 2005 .

[36]  Mahmut Bayramoglu,et al.  Photocatalytic decolorization of Remazol Red RR in aqueous ZnO suspensions , 2004 .

[37]  A. Mills,et al.  Novel photochemistry of leuco-Methylene Blue. , 2003, Chemical communications.

[38]  David R. Clarke,et al.  On the optical band gap of zinc oxide , 1998 .