用廉价空穴存储层修饰的赤铁矿光阳极用于高效太阳能水氧化。
Hematite photoanode modified with inexpensive hole-storage layer for highly efficient solar water oxidation.
作者信息
He Xiaolin, Shang Chaoqun, Meng Qingguo, Chen Zhihong, Jin Mingliang, Shui Lingling, Zhang Yongguang, Zhang Zhang, Yuan Mingzhe, Wang Xin, Kempa Krzysztof, Zhou Guofu
机构信息
Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, People's Republic of China.
出版信息
Nanotechnology. 2020 Nov 6;31(45):455405. doi: 10.1088/1361-6528/ab8e74. Epub 2020 Apr 29.
Hematite is recognized as an excellent photocatalyst for photoelectrochemical photoanodes for water oxidation because of its favorable band gap, excellent anti-photocorrosion and structural stability in alkaline solution. However, slow charge transport and fast carrier recombination in the bulk and at the hematite photoanode/electrolyte interface, have limited its applications for water splitting. Herein, we report a highly efficient hematite/ferrhydrite (Fh) core-shell photoanode system, consisting of hematite (α-FeO) semiconductor nanorods which dramatically enhance light harvesting, and ferrhydrite as the hole-storage shell. Our integrated hematite/ferrhydrite core-shell photoanode shows 2.7 times increased photo-current density under simulated sun light irradiation.
赤铁矿因其具有合适的带隙、出色的抗光腐蚀性能以及在碱性溶液中的结构稳定性，被认为是用于水氧化的光电化学光阳极的优良光催化剂。然而，在本体以及赤铁矿光阳极/电解质界面处缓慢的电荷传输和快速的载流子复合，限制了其在水分解中的应用。在此，我们报道了一种高效的赤铁矿/水铁矿（Fh）核壳光阳极体系，它由能显著增强光捕获的赤铁矿（α-FeO）半导体纳米棒和作为空穴存储壳层的水铁矿组成。我们集成的赤铁矿/水铁矿核壳光阳极在模拟太阳光照射下，光电流密度提高了2.7倍。
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