Influence of TiO2 phase composition on the photocatalytic activity of TiO2/MWCNT composites prepared by combined sol-gel/hydrothermal method

被引：33

作者：

Reti, Balazs ^{[1
]}

Major, Zoltan ^{[1
]}

Szarka, Dora ^{[1
]}

Boldizsar, Tamas ^{[1
]}

Horvath, Endre ^{[2
]}

Magrez, Arnaud ^{[3
]}

Forro, Laszlo ^{[2
]}

Dombi, Andras ^{[4
,5
]}

Hernadi, Klara ^{[1
,4
]}

机构：

[1] Univ Szeged, Fac Sci & Informat, Dept Appl & Environm Chem, Rerrich Ter 1, H-6720 Szeged, Hungary

[2] Ecole Polytech Fed Lausanne, Lab Nanostruct & Novel Elect Mat, Inst Condensed Matter Phys, CH-1015 Lausanne, Switzerland

[3] Ecole Polytech Fed Lausanne, Crystal Growth Facil, Inst Condensed Matter Phys, CH-1015 Lausanne, Switzerland

[4] Univ Szeged, Inst Chem, Fac Sci & Informat, Res Grp Environm Chem, Dom Ter 7, H-6720 Szeged, Hungary

[5] Univ Szeged, Inst Mat Sci & Engn, Tisza Lajos Krt 103, H-6720 Szeged, Hungary

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2016年 / 414卷

关键词：

Carbon nanotube; Titanium dioxide; Photocatalysis; Material science; Salicylic acid; MULTIWALLED CARBON NANOTUBES; SALICYLIC-ACID; TITANIUM-DIOXIDE; HYDROGEN-PEROXIDE; HYDROTHERMAL SYNTHESIS; DEGRADATION; OXIDATION; GROWTH; ADSORPTION; REACTIVITY;

D O I：

10.1016/j.molcata.2016.01.016

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Titanium dioxide/multiwall carbon nanotube (TiO2/MWCNT) composites were prepared by sol-gel method with hydrolysis of titanium alkoxide precursor followed by crystallization via hydrothermal treatment at different acid concentrations. Transmission electron microscopy (TEM) measurements revealed that the acid concentration has serious control over the morphology which is in good agreement with the change of specific surface area. According to the X-ray diffraction analysis of the samples the anatase/rutile ratio of the TiO2 in the composite can be tuned by the manipulation of acid concentration used for the hydrothermal crystallization. Samples were tested in aqueous-phase photocatalytic degradation reaction of salicylic acid in a batch-type foam reactor using relatively low power UV-A irradiation. The change in salicylic acid concentration was monitored by UV-vis spectroscopy technique. Anatase/rutile ratio decreased with increasing acid concentration and photocatalytic performance was decreased with increasing rutile content, however low rutile content (11 wt%) enhanced the photocatalytic efficiency above all prepared samples. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：140 / 147

页数：8

共 52 条

[1] Photochemical and photocatalytic degradation of salicylic acid with hydrogen peroxide over TiO2/SiO2 fibres [J].