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Title:	The application of visiblelight active Ag loaded Ag2SO3 photocatalyst over cement based substrate for rhodamine B degration
Authors:	Md Riad Hasan (P82998)
Supervisor:	Muhammad Fauzi Mohd Zain, Prof. Dr.
Keywords:	Water -- Purification -- Photocatalysis Photocatalysis Universiti Kebangsaan Malaysia -- Dissertations Dissertations, Academic -- Malaysia
Issue Date:	30-May-2019
Description:	In recent years, the methods of waste water purification based on photocatalyst have acknowledged much consideration as promising and advancing methods. Application of photocatalytic compounds over the cement-based surface can help with depollution of several contaminants found in an urban water stream through an advanced oxidation process (AOP). However, limited light responding range and their application method over cement-based surface limit the further use of the photocatalyst-based material. In this study, Ag loaded Ag2SO3 (SLSS) photocatalyst was used for photocatalytic degradation of Rhodamine B (RhB) to investigate the feasibility of designing an immobilized catalytic reactor for waste water treatment based on cement-based surface under visible light irradiation. Ag supported Ag2SO3 was synthesized at room temperature. The properties of the prepared photocatalysts were characterized by X-ray diffraction (XRD), Field-emission scanning electron microscopy (FESEM) and Ultraviolet–Visible (UV-Vis) spectroscopy. The photocatalytic efficiency of Ag0 loaded Ag2SO3 (SLSS) was found increasing up to the molar ratio of Ag0 increased from 1 % to 5% under visible light irradiation. Cement paste samples (Ordinary Portland Cement Type I, w/c=0.45) coated with 5% SLSS photocatalyst by different coating procedures containing slurry method (SM), cement mixed method (CMM), epoxy sealer method (ESM) & waterproof sealer method (WSM) have been evaluated based on Rhodamine B (RhB) degradation under artificial visible light irradiation. The efficiency of the process was determined in operation in various conditions including influent RhB concentration, pH, the concentration of photocatalyst, application method of photocatalyst and visible light intensity. The 5%-Ag0 loaded Ag2SO3 coated by the ESM method over cement paste sample showed 100 % degradation for 100 ml RhB (5mg/l, pH=5.6) degradation under artificial visible light source irradiation in 120 minutes which is 5 times more efficient than TiO2 with the same experimental condition.,Master of Science
Pages:	83
Call Number:	TD468.H337 2019 3 tesis
Publisher:	UKM, Bangi
Appears in Collections:	Faculty of Engineering and Built Environment / Fakulti Kejuruteraan dan Alam Bina

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