Photocatalytic activity of porous titania nanocrystals prepared by nanoscale permeation process in supercritical CO2: Effects of supercritical conditions

Autor:	Gongxi Chen, Xiaohua Wang, Mingyuan Ma, Youji Li
Rok vydání:	2009
Předmět:	Chromatography Materials science Process Chemistry and Technology General Chemistry Permeation Catalysis Supercritical fluid chemistry.chemical_compound chemistry Chemical engineering Nanocrystal medicine Photocatalysis Degradation (geology) Methylene blue Activated carbon medicine.drug
Zdroj:	Catalysis Communications. 10:1985-1989
ISSN:	1566-7367
Popis:	Porous TiO2 nanocrystals (PTN) were synthesized using activated carbon templates with supercritical CO2 by using the nanoscale permeation (NP) process. The photoactivity of PTN was tested by methylene blue (MB) degradation. Compared with the commercially available P-25, all PTN exhibited significant photocatalytic degradation of MB mainly due to their porous structure with high surface area, high hydroxy concentration and small crystalline size. The optimum temperature and pressure are found to be 60 °C and 26 MPa, under which obtained PTN-1 shows the highest photoactivity and slow deactivation for MB degradation after 15 trials.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3ad90fee8c6a7535ca8224795f5f4ae5 https://doi.org/10.1016/j.catcom.2009.07.013 Zobrazit plný text záznamu Full Text from ScienceDirect