Surface modification of highly ordered TiO2 nanotube arrays for efficient photoelectrocatalytic water splitting
Surface modification of highly ordered TiO2 nanotube arrays for efficient photoelectrocatalytic water splitting
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DOI：
10.1063/1.3099338
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发表时间：
2009-03-16
影响因子：
4
通讯作者：
Chien, Shu-Hua
中科院分区：
文献类型：
--
作者：
Lin, Chin-Jung;Lu, Yen-Tien;Chien, Shu-Hua
研究了CdS纳米粒子/ZnO壳层/TiO 2纳米管（CdS/ZnO-TiNT）阵列可见光敏感高效太阳能水分解光阳极。采用电化学阳极氧化法在钛片上垂直生长了高度有序的TiNT阵列。这两种水溶液路线依次用于涂覆薄的复合屏障的ZnO壳和窄带隙CdS纳米粒子的TiNT阵列的表面。由于CdS/ZnO-TiNT阵列在太阳光谱范围内的强吸收和对电子-空穴对复合的有效抑制，太阳能-氢气转换效率从0.39%显著提高到1.30%。
An efficient visible-light-sensitive heterostructure photoanode of CdS nanoparticles/ZnO shell/TiO2 nanotube (CdS/ZnO-TiNT) arrays were investigated for solar water splitting. Highly ordered arrays of TiNT were grown vertically on Ti foil by electrochemical anodization. Both aqueous solution routes were used in turn to coat a thin recombination barrier of ZnO shell and narrow band gap CdS nanoparticles to the surface of the TiNT arrays. As a result of strong absorption within solar spectrum and effective suppression of electron-hole pair recombination in CdS/ZnO-TiNT arrays, a significant improvement in solar-to-hydrogen conversion efficiency from 0.39% to 1.30% was obtained.