Highly Selective Deethylation of Rhodamine B on TiO2 Prepared in Supercritical Fluids

被引：66

作者：

Fan, Yuzun ^{[1
]}

Chen, Guoping ^{[1
]}

Li, Dongmei ^{[1
]}

Luo, Yanhong ^{[1
]}

Lock, Nina ^{[2
,3
]}

Jensen, Anca Paduraru ^{[4
]}

Mamakhel, Aref ^{[4
]}

Mi, Jianli ^{[2
,3
]}

Iversen, Steen B. ^{[4
]}

Meng, Qingbo ^{[1
]}

Iversen, Bo B. ^{[2
,3
]}

机构：

[1] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China

[2] Aarhus Univ, Ctr Mat Crystallog, Dept Chem, DK-8000 Aarhus, Denmark

[3] Aarhus Univ, Interdisciplinary Nanosci Ctr, DK-8000 Aarhus, Denmark

[4] SCF Technol AS, DK-2730 Herlev, Denmark

来源：

INTERNATIONAL JOURNAL OF PHOTOENERGY | 2012年 / 2012卷

基金：

中国国家自然科学基金; 新加坡国家研究基金会;

关键词：

VISIBLE-LIGHT IRRADIATION; LOW-TEMPERATURE SYNTHESIS; PHOTOCATALYTIC ACTIVITY; HETEROGENEOUS PHOTOCATALYSIS; PHOTOASSISTED DEGRADATION; WATER SYNTHESIS; DYE POLLUTANTS; NANOPARTICLES; ADSORPTION; SIZE;

D O I：

10.1155/2012/173865

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

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.

引用

页数：7

共 31 条

[1]

Critical size of crystalline ZrO2 nanoparticles synthesized in near- and supercritical water and supercritical isopropyl alcohol [J].