Synthesis and Applications of Green Synthesized TiO₂ Nanoparticles for Photocatalytic Dye Degradation and Antibacterial Activity

Abstract

Metal oxide photocatalyst is one of the promising photocatalysts in the water remediation process. The present work is aimed at synthesizing the green production of TiO2 (G-TiO2) nanoparticles from mulberry plant extract. Plant phytochemicals serve a different role to produce the nanophase particles. The bioreductant is safer and noxious free compound for synthesizing the G-TiO2 nanoparticles. The synthesized G-TiO2 nanoparticles in anatase phase and their crystallite size of 24 nm were characterized from X-ray diffraction analysis. The Ti-O bonding and plant derivatives and their reduction were confined from FTIR analysis. The wide bandgap of G-TiO2 nanoparticles (3.16 eV) and their optical characterization were captured from UV-DRS analysis. The spherical surface morphology and their Ti and O elemental configurations were characterized from FESEM with EDX technique. The photocatalytic dye degradation was examined against methylene blue dye, and their pseudo-first-order kinetics were evaluated. The cyclic experiments declared their catalytic potential. The bacterial resistance of G-TiO2 nanoparticles was examined against gram-positive and gram-negative bacteria. Hence, the catalytic potential and bacterial stability of G-TiO2 nanoparticles are the powerful candidate for water remediation and biomedical applications.

Green Synthesis of CS-TiO2 NPs for Efficient Photocatalytic Degradation of Methylene Blue Dye

“…Our design showed higher photocatalytic degradation% within a short time relative to the reported data in references [36,41,43,44,46]. Additionally, using a lower catalyst dose than that reported in references [35,[37][38][39][40]42,45], showed high catalytic efficiency.…”

“…This figure provided error bars of triplicate measurements. Table 2 shows the performance of our designed photocatalyst relative to the previously reported TiO 2 -based photocatalysts [35][36][37][38][39][40][41][42][43][44][45][46]. Our design showed higher photocatalytic degradation% within a short time relative to the reported data in references [36,41,43,44,46].…”

“…UV-Visible irradiation 92%/120 min [28] Green 10 mg (10 ppm, methylene blue) UV 96%/120 min [45] CS-TiO2 NPs 10 mg/L (5 mM, methylene blue) UV irradiation 98.2%/80 min This work…”

“…The photocatalytic performance of CS-TiO 2 NPs relative to previously reported TiO 2 -based photocatalysts[35][36][37][38][39][40][41][42][43][44][45][46].…”

Photocatalytic Materials Obtained from E-Waste Recycling: Review, Techniques, Critique, and Update

“…According to the literature, TiO2-based materials are considered the most widely used photocatalysts with many green applications (waste water remediation [95,96], dye degradation [97], solar cells [98], etc.) and have many advantages, such as the ability to absorb visible and UV light, biological and chemical inertness, low cost, etc.…”