Distinct Role of La Doping in Regulating the Photo-Oxidation and Reduction of BiOBr Nanosheet

作者：Fan Qi-Zhe; Liao Chun-Fa^*; Li Zhi-Feng; Zhang Zhi-Wen; Chen Xin; Yu Chang -Lin^*

来源：Chinese Journal of Inorganic Chemistry, 2018, 34(11): 2115-2126.

DOI：10.11862/CJIC.2018.255

• photocatalysis
• photo-oxidation
• bismuth halide oxides
• lanthanum
• doping

Both organic cetyltrimethyl ammonium bromide (CTAB) and inorganic NaBr are served as the bromine source, the thylakoid-like La doped BiOBr photocatalysts were synthesized via a hydrothermal process. The obtained samples were first characterized by X-ray diffraction (XRD), N-2 physical adsorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-visible spectroscopy, X-ray photoelectron spectroscopy (XPS) and photoluminescence (PL) spectroscopy. Then, the effects of photo-oxidation and reduction properties of BiOBr with La doping were investigated by DFT calculation. The photo-oxidation and reduction activity of the pure and La doped BiOBr samples were evaluated by photo-catalytic degradation of acid orange II, ammonia nitrogen and methylene blue reduction under visible light irradiation. The results showed that it could inhibit growth of BiOBr crystals and promote the stacking crystals when La doped. More importantly, the oxidation performances of BiOBr were promoted, where the reduction performances were inhibited in large part by La doping.

• 出版日期2018-11-10
• 单位江西理工大学