Enhancement of Photoelectrochemical Performance of AACVD‐produced TiO2 Electrodes by Microwave Irradiation while Preserving the Nanostructure
Enhancement of Photoelectrochemical Performance of AACVD‐produced TiO2 Electrodes by Microwave Irradiation while Preserving the Nanostructure
复制标题
通过微波辐照增强 AACVD 生产的 TiO2 电极的光电化学性能，同时保留纳米结构
DOI：
--
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
K. Wijayantha
中科院分区：
文献类型：
--
作者：
A. Tahir;T. A. Peiris;K. Wijayantha
通过气溶胶辅助化学气相沉积 (AACVD) 在 350 和 400°C 下将 TiO2 电极沉积在 FTO 玻璃基板上，并用不同百分比（10%、25%、50% 和 100%）的微波辐射（2.45GHz）照射沉积的 TiO2 电极。 X射线衍射(XRD)图显示沉积电极具有沿(101)方向取向的锐钛矿相TiO2，并且这些电极在微波处理后结晶度增加。场发射枪扫描电子显微镜 (FEG-SEM) 表面形貌分析证明纳米结构在暴露于不同百分比的微波辐射后仍得以保存。光电化学 (PEC) 研究证明，在 100% 微波照射后，AACVD 生产的 TiO2 电极的光电流密度提高了三倍。 PEC 特性的这种改进归因于结晶度和颗粒颈缩特性的改进。结果表明，微波处理是 TiO2 光电阳极传统烧结的一种有前途的替代方法。
TiO2 electrodes are deposited on FTO-glass substrates at 350 and 400 °C by aerosol-assisted chemical vapour deposition (AACVD) and the deposited TiO2 electrodes are irradiated with microwave radiation (2.45 GHz) at various percentages (10, 25, 50, and 100%). X-ray diffraction (XRD) pattern shows that the deposited electrodes have anatase phase TiO2 oriented in the (101) direction, and the crystallinity of these electrodes increases after microwave treatment. Field emission gun scanning electron microscopy (FEG-SEM) surface topography analysis proves the preservation of the nanostructure after exposure to various percentages of microwave radiation. The photoelectrochemical (PEC) studies prove a threefold enhancement of photocurrent density of AACVD-produced TiO2 electrodes after 100% microwave irradiation. This improved performance of PEC properties is attributed to improvements in the crystallinity and the particle-necking properties. The results presented demonstrate that microwave processing is a promising alternative method to conventional sintering for TiO2 photoanodes.