Ordered mesoporous nanocrystalline titania: A promising new class of photocatalyic materials

• Published in: Catalysis today 2018-07, Vol.309, p.202-211
• Main Authors: Alagarasi, A., Rajalakshmi, P.U., Shanthi, K., Selvam, P.
• Format: Article
• Language: English
• Subjects: 4-chlorophenol degradation; Mesoporous nanocrystalline titania; Photocatalyst
• ISSN: 0920-5861; 1873-4308
• DOI: 10.1016/j.cattod.2017.08.001

Photocatalytic degradation of 4-chlorophenol over mixed phase mesoporous titania. [Display omitted] •Uniform-sized nanocrystalline mesoporous titania was successfully.•Crystalline phase transformation influences significantly photodegaradtion of 4-chlorophenol.•The performance of mesoporous titania for the photocatalytic degradation is considerably higher than the commercial titania (Aeroxide, P-25). We report the photocatalytic activity of uniform-sized nanocrystalline mesoporous titania synthesized via surfactant-mediated hydrothermal method. All the prepared catalysts were systematically characterized by various analytical, spectroscopic and imaging techniques. The characterization results indicate that all the catalysts under investigation possess uniform-sized nanocrystalline particles having mesoporous pore structure with narrow pore size distribution. The phase transformation occurs from anatase, brookite to rutile phase while increasing the calcination temperature. The performance of mixed phase titania for the photocatalytic degradation of 4-chlorophenol was analyzed. These catalysts show much higher activity than commercial titania (Aeroxide; P-25) owing to synergistic effect of stable mesoporous structure and mixed crystalline phases of titania.