期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 535, 期 -, 页码 408-414出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2018.09.102
关键词
Sn-doped hematite; CaMn2O4 nanowire; Water oxidation; Anode material
资金
- National Natural Science Foundation of China [21373143]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- project of scientific and technologic infrastructure of Suzhou [SZS201708]
Herein, we report a novel nanocomposite consisting of n-type Sn-doped hematite and p-type CaMn2O4 nanowire (CaMn2O4/alpha-Fe2O3). The nanocomposite was characterized by X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), ultraviolet-visible absorption spectroscopy, X-ray photoelectron spectroscopy (XPS), which showed that nanospindle-like Sn-doped hematite and CaMn2O4 nanowire contact intimately in the nanocomposite, resulting in efficient charge transfer and separation. Photoelectrochemical results reveal that the nanocomposite possesses higher donor density, enhanced conductivity and lower overpotential for dioxygen evolution. In addition, the nanocomposite demonstrates high photocatalytic activity for water oxidation to produce oxygen in a photoelectrochemical cell. The amount of O-2 evolved from the optimized photoanode of the photoelectrochemical cell was 1.98 mu mol in 2 h of simulated sunlight irradiation. This work demonstrates a facile synthesis of a novel nanocomposite as anode material for photocatalytic water oxidation to produce O-2. (C) 2018 Elsevier Inc. All rights reserved.
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