Wang Yi, Cai Fang, Guo Pengran, Lei Yongqian, Xi Qiaoyue, Wang Fuxian
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.
Nanomaterials (Basel). 2019 Sep 5;9(9):1257. doi: 10.3390/nano9091257.
In this article, a short-time hydrothermal method is developed to prepare CuBiO nanocolumn arrays. By using Bi(NO)·5HO in acetic acid and Cu(NO)·3HO in ethanol as precursor solutions, tetragonal CuBiO with good visible light absorption can be fabricated within 0.5 h at 120 °C. Tetragonal structured CuBiO 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 CuBiO. The CuBiO obtained through 0.5 h hydrothermal synthesis shows a band gap of 1.75 eV and exhibits the highest photocatalytic performance among the CuBiO prepared with various hydrothermal time. The removal rate of methylene blue by the 0.5 h CuBiO reaches 91% under visible light irradiation for 0.5 h. This study proposes a novel strategy to prepare photoactive CuBiO 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.
在本文中，开发了一种短时水热法来制备CuBiO纳米柱阵列。通过使用乙酸中的Bi(NO)·5HO和乙醇中的Cu(NO)·3HO作为前驱体溶液，在120℃下0.5小时内即可制备出具有良好可见光吸收性能的四方相CuBiO。水热处理15分钟后可形成四方结构的CuBiO，但其可见光吸收性能较差且光催化活性较低。将水热处理时间延长至0.5小时可显著提高四方相CuBiO的可见光吸收性能。通过0.5小时水热合成得到的CuBiO的带隙为1.75 eV，在不同水热时间制备的CuBiO中表现出最高的光催化性能。在可见光照射0.5小时的条件下，0.5小时制备的CuBiO对亚甲基蓝的去除率达到91%。本研究提出了一种在120℃的适中温度下0.5小时内制备光活性CuBiO纳米柱阵列的新策略。水热法为在温和反应条件下快速合成金属氧化物基光催化剂提供了一种简便的策略。
