自製與市售二氧化鈦光觸媒對亞甲基藍水溶液光催化反應之研究

Study on the Treatment of Methylene Blue in Aqueous Solution Via self-made and Commercial TiO2 Photocatalysts

陳煜斌(I-Pin Chen) ； 姜美琪(Mei-Chi Jiang) ； 游宗霖(Tzung-Lin You) ； 楊雯涵(Wing-Han Yang)

《嘉南學報（科技類）》 35期 (2009/12) Pp. 1-12

https://doi.org/10.29540/CNABST.200912.0001

摘要

This study we used self-made and commercial TiO2 catalyst to investigate the photocatalytic oxidation of methylene blue (MB) by reaction conditions like the light source, catalyst loading, initial concentration of MB and initial pH. This paper also examined the crystalline phase and diameter of catalysts via the characterization of catalysts of XRD、EET and SEM.
For the physical test of photocatalyst, we found both self-made and commercial Merck TiO2 catalyst result an apparently and centrally linear laser beam, may show these catalysts with small diameter and perform better in photocatalytic oxidation. The experimental result indicated these catalysts enables over 95% color removal after 6h of reaction in 10 ppm MB solution under the light source of 365nm with 0.75g/L of catalyst loading. The efficacies of photocatalytic oxidation of MB increased with catalysts loading, but no significant increase when catalysts loading over 0.5g/L. The color removal after 6h of reaction decreased as initial MB concentration increased. As for initial concentration of MB, self-made TiO2 was superior to Merck at the MB solutions of 20 ppm、30 ppm and 40 ppm. For initial pH, it was found that the order of efficiency of Merck was pH10＞pH6＞pH3, while the efficiency of self-made was pH6＞pH10＞pH3, which indicated both catalysts are favorable in non-acidic solutions.

關鍵字

亞甲基藍 ； 二氧化鈦 ； 光觸媒 ； 起始pH

並列摘要

This study we used self-made and commercial TiO2 catalyst to investigate the photocatalytic oxidation of methylene blue (MB) by reaction conditions like the light source, catalyst loading, initial concentration of MB and initial pH. This paper also examined the crystalline phase and diameter of catalysts via the characterization of catalysts of XRD、EET and SEM.
For the physical test of photocatalyst, we found both self-made and commercial Merck TiO2 catalyst result an apparently and centrally linear laser beam, may show these catalysts with small diameter and perform better in photocatalytic oxidation. The experimental result indicated these catalysts enables over 95% color removal after 6h of reaction in 10 ppm MB solution under the light source of 365nm with 0.75g/L of catalyst loading. The efficacies of photocatalytic oxidation of MB increased with catalysts loading, but no significant increase when catalysts loading over 0.5g/L. The color removal after 6h of reaction decreased as initial MB concentration increased. As for initial concentration of MB, self-made TiO2 was superior to Merck at the MB solutions of 20 ppm、30 ppm and 40 ppm. For initial pH, it was found that the order of efficiency of Merck was pH10＞pH6＞pH3, while the efficiency of self-made was pH6＞pH10＞pH3, which indicated both catalysts are favorable in non-acidic solutions.

並列關鍵字

methylene blue ； TiO2 ； photocatalyst ； initial pH