Mesoporous titanium dioxide: sonochemical synthesis and application in dye-sensitized solar cells

被引：146

作者：

Wang, YQ ^{[1
]}

Chen, SG ^{[1
]}

Tang, XH ^{[1
]}

Palchik, O ^{[1
]}

Zaban, A ^{[1
]}

Koltypin, Y ^{[1
]}

Gedanken, A ^{[1
]}

机构：

[1] Bar Ilan Univ, Dept Chem, IL-52900 Ramat Gan, Israel

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2001年 / 11卷 / 02期

关键词：

D O I：

10.1039/b006070o

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：

A novel method for shortening the synthesis time of mesoporous TiO2 to 6 h is reported. Low-angle XRD and TEM showed that mesoporous TiO2 with short-range ordered structures was synthesized when octadecylamine was used as a structure-directing agent and when Ti(OPri)(4) was used as a precursor. The highest surface area (853 m(2) g(-1)) was obtained after extraction with a dilute solution of nitric acid. The material maintained a high surface area (467 m(2) g(-1)) after calcination at 350 degreesC, but the short-range ordered structures collapsed. XPS showed the interaction between TiO2 and octadecylamine, while DSC, TGA, and FT-IR spectra showed the removal of octadecylamine by extraction and calcination. A mechanism for the fast formation of mesoporous TiO2 is proposed. It is attributed to the formation of mesoporous material at high temperatures formed in the interface between the gas and bulk solutions resulting from ultrasound irradiation. Electrodes made from the mesoporous TiO2 were tested in a dye-sensitized solar cell. The short-circuit photocurrent, open-circuit photovoltage and fill factor increased with an increase in the sintering temperature, having a performance threshold at 450 degreesC, showing that the more ordered structures are required for high solar cell conversion efficiencies.

引用

页码：521 / 526

页数：6

共 33 条

[1] SYNTHESIS OF HEXAGONALLY PACKED MESOPOROUS TIO2 BY A MODIFIED SOL-GEL METHOD [J].