Abstract
The present work focuses on the synthesis of Prosopis juliflora bark activated carbon supported on TiO2 (PJBAC/TiO2) composite through the sol-gel method for the decolourization of Direct Brown 2 (DB2). The prepared composite was characterized by Fourier-transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray (EDX) analysis. The surface area and pore diameter were explored by the Brunauer−Emmett−Teller method (N2 adsorption/desorption). Furthermore, high-performance liquid chromatography (HPLC) and total organic carbon (TOC) analysis of the treated solution revealed a complete degradation of the dye molecule. The degradation efficiency of the prepared composite was analysed via batch equilibration studies. Maximum removal of DB2 (98%) was achieved at an initial concentration of 100 mg/L, contact time of 210 min, composite dose of 100 mg, and at pH 3. The well-known Freundlich and Langmuir isotherm equations were applied for the evaluation of equilibrium adsorption data. Lagergren and Ho−McKay kinetic models were employed to determine the adsorption rate constant. Additionally, the antimicrobial activity of PJBAC/TiO2 was tested against Staphylococcus aureus, Escherichia coli, and Candida species. These results indicate that doping of TiO2 on PJBAC inhibits the recombination of electron−hole pairs to improve photocatalytic performance in the visible region.
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ACKNOWLEDGMENTS
The authors are thankful to the Department of Chemistry, Dr.N.G.P Institute of Technology, Coimbatore, Tamil Nadu, India for their kind support in carrying out these studies.
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Kallapalayam Subramaniam Thangamani, Suba, V., Radha, V.P. et al. Investigation on Nanoarchitectonics of PJBAC/TiO2 for Photocatalytic and Antimicrobial Performance. J. Water Chem. Technol. 46, 132–148 (2024). https://doi.org/10.3103/S1063455X24020127
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DOI: https://doi.org/10.3103/S1063455X24020127