Highly Selective Deethylation of Rhodamine B on TiO2 Prepared in Supercritical Fluids. (1st August 2011)

• Record Type: Journal Article
• Authors: Fan, Yuzun; Chen, Guoping; Li, Dongmei; Luo, Yanhong; Lock, Nina; Jensen, Anca Paduraru; Mamakhel, Aref; Mi, Jianli; Iversen, Steen B.; Meng, Qingbo; Iversen, Bo B.
• Other Names: Yu Jiaguo Academic Editor.
• Is Part Of: International journal of photoenergy. Volume 2012(2012)
• Publication Date: 2011-08-01
• Subjects: Photochemistry -- Periodicals; Photobiology -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Photochimie; Photobiologie; Chimie physique et théorique; Chemistry, Physical and theoretical; Photobiology; Photochemistry; Electronic journals; Periodicals; 541.35
• DOI: 10.1155/2012/173865
• Languages: English
• ISSNs: 1110-662X

Abstract

Abstract : 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 .