Open AccessSTUDY ON SYNTHESIS OF TiO2-SiO2-BASED PHOTOCATALYST AND ITS APPLICATION IN DEGRADATION OF AQUEOUS PHENOL
Author(s) -
Vinh T. Nguyen,
Cuong Viet Nguyen
Publication year - 2009
Publication title -
khoa học công nghệ
Language(s) - English
Resource type - Journals
ISSN - 1859-0128
DOI - 10.32508/stdj.v12i2.2203
Subject(s) - phenol , crystallinity , photocatalysis , catalysis , aqueous solution , degradation (telecommunications) , visible spectrum , materials science , absorption (acoustics) , chemical engineering , sunlight , specific surface area , nuclear chemistry , chemistry , photochemistry , organic chemistry , composite material , optics , computer science , optoelectronics , physics , engineering , telecommunications
Gel derived TiO2-SiO2 and N-TiO2-SiO2 mixed oxides are synthesized and employed for phenol removal under UVA light and natural sunlight in this study. Both SiO2 and N are interestingly found to improve the specific surface area of resulting catalysts as compared to bare TiO2. Meanwhile, only N is observed to significantly shift the light absorption of derived catalyst to visible range. Optimization between specific surface area and crystallinity is found to give rise to the superior photoactivity of TiO2-SiO2 catalyst in comparison with TiO2 counterpart. Under natural sunlight in Hochiminh City in September, N-TiO2-SiO2 presents the outstanding photoactivity towards phenol removal with the efficiency up to 90% as compared to those of 62% and 60% for bare TiO2-SiO2 and bare TiO2, respectively.