Controllable Synthesis of Bi2Fe4O9 Nanocrystal with High Active Facets and the Enhanced Visible Light Photoelectrochemical PropertyYan Zhang, Yanhua Peng, Jinqiu Zhang, Chunhu Li and Jianqiang YuMATEC Web Conf., 67 (2016) 06045DOI: https://doi.org/10.1051/matecconf/20166706045