Short-Time Hydrothermal Synthesis of CuBi2O4 Nanocolumn Arrays for Efficient Visible-Light Photocatalysis

Nanomaterials

Fang Cai¹  Yi Wang¹  Qiaoyue Xi²  Fuxian Wang²  Yongqian Lei²  Pengran Guo² 

[1] College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou 730050, China;Guangdong Provincial Key Laboratory of Emergency Test for Dangerous Chemicals, Guangdong Engineering Technology Research Center of On-line Monitoring of Water Environmental Pollution, Guangdong Institute of Analysis, Guangzhou 510070, China;

关键词: CuBi₂O₄;    short-time;    hydrothermal method;    photocatalytic degradation;    methylene blue;   

DOI  :  10.3390/nano9091257

来源: DOAJ

【 摘 要 】

In this article, a short-time hydrothermal method is developed to prepare CuBi₂O₄ nanocolumn arrays. By using Bi(NO₃)₃·5H₂O in acetic acid and Cu(NO₃)₂·3H₂O in ethanol as precursor solutions, tetragonal CuBi₂O₄ with good visible light absorption can be fabricated within 0.5 h at 120 °C. Tetragonal structured CuBi₂O₄ can be formed after 15 min hydrothermal treatment, however it possesses poor visible light absorption and low photocatalytic activity. Extending the hydrothermal treatment duration to 0.5 h results in a significant improvement invisible light absorption of the tetragonal CuBi₂O₄. The CuBi₂O₄ obtained through 0.5 h hydrothermal synthesis shows a band gap of 1.75 eV and exhibits the highest photocatalytic performance among the CuBi₂O₄ prepared with various hydrothermal time. The removal rate of methylene blue by the 0.5 h CuBi₂O₄ reaches 91% under visible light irradiation for 0.5 h. This study proposes a novel strategy to prepare photoactive CuBi₂O₄ nanocolumn arrays within 0.5 h at a moderate temperature of 120 °C. The hydrothermal method provides a facile strategy for the fast synthesis of metal-oxide-based photocatalysts at mild reaction conditions.

【 授权许可】

Unknown