Application of hydrothermally produced TiO2 nanotubes in photocatalytic esterification of oleic acid

被引：37

作者：

Manique, Marcia Cardoso ^{[1
]}

Silva, Aline Posteral ^{[1
]}

Alves, Annelise Kopp ^{[1
]}

Bergmann, Carlos Perez ^{[1
]}

机构：

[1] Univ Fed Rio Grande do Sul, Lab Ceram Mat, Porto Alegre, RS, Brazil

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2016年 / 206卷

关键词：

TNTs; Hydrothermal method; Photocatalysis; Esterification; Oleic acid; BIODIESEL PRODUCTION; HYDROGEN-PRODUCTION; CALCINATION TEMPERATURE; TITANATE NANOTUBES; TRANSESTERIFICATION; DEGRADATION; ADSORPTION; CATALYSTS; SILVER; OILS;

D O I：

10.1016/j.mseb.2016.01.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This study investigated the use of TiO2 nanotubes (TNTs) as photocatalysts in the esterification of fatty acids for biodiesel production. The TNTs were synthesized via a hydrothermal route and evaluated for their crystallinity, morphology, surface area and photocatalytic activity compared with a TiO2 P25 standard. Optimum photocatalytic conditions were obtained using a 15% concentration of catalyst (w/w) and a 3:1 molar ratio of methanol to oleic acid. The highest yield of methyl oleate obtained was 86.0% when P25 was used as a photocatalyst. The lowest band gap energy was obtained with the TNT sample synthesized at 110 degrees C for 48 h (E-g = 3.08 eV), which also exhibited the highest rate of oleic acid esterification (59.3%) among all the investigated TNTs. We also observed that, in addition to the band gap, other factors such as the crystalline phase of the TNTs and their surface area were important in photocatalytic performance. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：17 / 21

页数：5

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