Green synthesis of TiO2 nanoparticles from Syzygium cumini extract for photo-catalytic removal of lead (Pb) in explosive industrial wastewater

• Published in: Green processing and synthesis Vol. 9; no. 1; pp. 171 - 181
• Main Authors: Sethy, Naresh Kumar, Arif, Zeenat, Mishra, Pradeep Kumar, Kumar, Pradeep
• Format: Journal Article
• Language: English
• Published: Berlin De Gruyter 01.01.2020; Walter de Gruyter GmbH
• Subjects: Anatase; Aqueous solutions; Chemical oxygen demand; Electron microscopy; Energy dispersive X ray spectroscopy; extract; Fourier transforms; green synthesis; High resolution; Inductively coupled plasma; Industrial wastes; Industrial wastewater; Infrared spectroscopy; Lead; Light diffraction; Light scattering; Microscopy; Morphology; Nanoparticles; Organic chemistry; photo-catalytic degradation; Photon correlation spectroscopy; Plant extracts; Plasma spectra; Scanning electron microscopy; Spectroscopy; Spectrum analysis; Surgical implants; Syzygium cumini; syzygium cumini extract; TiO; tio2 nanoparticles; Titanium dioxide; Transmission electron microscopy; Wastewater; Wastewater treatment; X-ray diffraction
• ISSN: 2191-9542; 2191-9550
• DOI: 10.1515/gps-2020-0018

Green synthesis is a simple, non-toxic, economical and eco-friendly approach for the synthesis of nanoparticles. In the present work, nanoparticles of titanium dioxide (TiO NPs) were synthesized using an aqueous solution of leaf extract as a capping agent. These green synthesized TiO NPs were further evaluated for photo catalytic removal of lead from industrial wastewater. Obtained nanoparticles were characterized using: high-resolution scanning electron microscopy (HRSEM), high-resolution transmission electron microscopy (HRTEM), X-ray energy dispersive spectroscopy (EDS), Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), dynamic light scattering (DLS) and Brunauer-Emmett-Teller (BET). Obtained results revealed that synthesized TiO NPs possess spherical morphology with anatase phase with a large BET surface area of 105 m /g. Photo catalytic studies of TiO NPs for lead removal from explosive wastewater were performed in a self-designed reactor. Inductive coupled plasma spectroscopy (ICP) was used to determine the lead concentration. Obtained results witnessed 75.5% removal in chemical oxygen demand (COD) and 82.53% removal in lead (Pb ). This application of green TiO NPs is being explored for the first time.