封面图片
2017年, 第11卷 第6期
Silicon(Si) is a widely applied photovoltage material in solar energy harvesting. However, the spontaneous oxidation process of pristine Si limits its application as photocatalyst or electrode in aqueous solution or moist air. Covering a protection layer on Si surface is an effective approach to overcome this disadvantage. In this paper, α-Fe2O3 is demonstrated to be an excellent alternative as a protection material. Compared with Si itself, the optical absorption and photocurrent density of α-Fe2O3 coated Si improved 2 times and 4 times, respectively, and its onset potential for hydrogen evolution moved positively about 0.4 V. These improved performances could be ascribed to the enhanced photogenerated-charge-separation efficiency deriving from built-in electric field at the interface between Si and α-Fe2O3. In this work, the application of Si materials as photocatalysts or electrodes in aqueous solution or moist air can be promoted. This could be further beneficial to utilizing in solar water splitting to produce hydrogen, CO2 reduction and pollutants degradation (e.g. dehalogenation).[展开] ...
ISSN 2095-2201N (Print)
ISSN 2095-221X (Online)
CN 10-1013/X
Postal Subscription Code 80-973
原刊名 Frontiers of Environmental Science & Engineering in China 2018 Impact Factor: 3.883