Open AccessHighly Selective Deethylation of Rhodamine B on Prepared in Supercritical Fluids
Author(s) -
Yuzun Fan,
Guoping Chen,
Dongmei Li,
Yanhong Luo,
Nina Lock,
Anca Paduraru Jensen,
Aref Mamakhel,
Jianli Mi,
Steen B. Iversen,
Qingbo Meng,
Bo B. Iversen
Publication year - 2011
Publication title -
international journal of photoenergy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.426
H-Index - 51
eISSN - 1687-529X
pISSN - 1110-662X
DOI - 10.1155/2012/173865
Subject(s) - photodegradation , rhodamine b , anatase , photocatalysis , crystallinity , supercritical fluid , materials science , chemical engineering , nanoparticle , photochemistry , nuclear chemistry , chemistry , nanotechnology , catalysis , organic chemistry , engineering , composite material
Pure phase anatase TiO2 nanoparticles with sizes of 5–8 nm and varying crystallinity were synthesized in supercritical isopropanol/water using a continuous flow reactor. Their photodegradation of rhodamine B (RhB) was evaluated under visible light irradiation. The as-prepared TiO2 nanoparticles show much higher photodegradation efficiencies than commercial Degussa P25 TiO2. Moreover, the photodegradation of RhB on the as-prepared TiO2 follows a different process from that on P25 TiO2, quicker N-deethylation and slower cleavage of conjugated chromophore structure. Based on PXRD, TEM, and BET measurements, these two photodegradation properties have been explained by the physicochemical properties of TiO2
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