Immobilization of TiO2/bentonite/α-Fe2O3 photocatalyst on glass plates and their study on the degradation of indigo carmine dyes

• Published in: AIP Conference Proceedings
• Main Author: Sheilatina; Fathurrahmi; Frastiwi F.; Nawawi W.I.; Sabar S.
• Format: Conference paper
• Language: English
• Published: American Institute of Physics 2024
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85189314541&doi=10.1063%2f5.0201592&partnerID=40&md5=deee6bd482a70335555b4141e8ae9bc3

Study on the utilization of iron sand and natural bentonite modified into TiO2/Bentonite/α-Fe2O3 photocatalysts immobilized on glass plates to obtain photocatalysts with good performance and high reusability without going through a filtering process has been conducted. Immobilization of TiO2/bentonite/α-Fe2O3 was carried out using the brush coating method and double-sided adhesive tape as a binder. Formulation of the immobilized TiO2/bentonite/α-Fe2O3composite was made by mixing TiO2 P25, bentonite, and Fe2O3 (hematite) with a mass ratio (g) of 16:4:1. Photocatalytic activity of the immobilized photocatalyst was evaluated using indigo carmine (IC) dye. Bentonite and hematite were characterized using X-Ray Diffraction (XRD). Surface morphology of hematite and TiO2/bentonite/α-Fe2O3 composite were characterized using Scanning Electron Microscopy-Energy Dispersive X-Ray (SEM-EDX). The results showed that the optimum photocatalytic activity in the degradation of IC dye was at the composite mass of 60 mg, pH 5 and concentration of solution 25 mg/L with a percentage degradation of 97.2% for 60 minutes of irradiation time. Regeneration of the TiO2/bentonite/α-Fe2O3 composites for degradation of IC dye was carried out for 5 cycles which gave similar photocatalytic activity results throughout the cycles. Immobilized TiO2/bentonite/α-Fe2O3 onto glass plate has shown a very good photocatalytic activity upon reusability. © 2024 Author(s).