Abstract: Three-dimensional (3D) hierarchical constructed flower-like α-Bi2O3 microspheres were prepared successfully via a simple solution precipita-tion method at 95 ℃ and ambient atmospheric pressure in 1 h. The synthesis process was operated in an ethanol-water system as solvent with the assistance of glycerol as capping agent. X-ray diffraction (XRD) and field-emission scanning electron microscope (FE-SEM) were employed to characterize the obtained products. The samples were all α phase with diameter of micrometer scale. With different concentration of glycerol, Bi2O3 shows different microstructures. When glycerol concentration was low, the product was nanocubes 3D self-assembled hierarchical flower-like microspheres, while at high glycerol concentration, the one-dimensional nanorods self-assembled hierarchical flower-like microspheres were obtained. The formation mechanism of the special micro-morphology was also analyzed. UV-visible diffuse reflectance spectrum shows that the samples present photoabsorption property from UV light region to visible light range, belonging to the absorption caused by electron transition from valence band to conduction band, which is Bi2O3 direct band gap absorption. The band gaps of the Bi2O3 samples are estimated to be 2.76 eV and 2.70 eV. The fluorescence spectrum of the samples shows broad emission (400—600 nm) and five emission bands (band centers are located at 450 nm, 466 nm, 480 nm, 490 nm, and 562 nm). The waveform and intensity of the fluorescence emission bands were affected by the micro-morphology of the materials. And the fluorescence intensity of nanorods self-assembled hierarchical flower-like microspheres was slightly weaker.
王亚军, 郭梁, 李泽雪. 一步沉淀法制备三维分等级花状α-Bi2O3微球及其光性能[J]. 材料导报, 2019, 33(8): 1257-1261.
WANG Yajun, GUO Liang, LI Zexue. Synthesis of 3D Hierarchical Flower-like α-Bi2O3 Microsphere by One-step Precipitation Method and Its Optical Property. Materials Reports, 2019, 33(8): 1257-1261.
1 Heaven M W, Cave G W, McKinlay R M, et al. Angewandte Chemie International Edition, 2006, 45(37), 6221. 2 Li H, Bian Z, Jian Z. Journal of the American Chemical Society, 2007, 129(27), 8406. 3 Zhou L, Wang W Z, Xu H L, et al. Chemistry—A European Journal, 2009, 15(7), 1776. 4 Tsai S Y, Fung K Z, Ni C T, et al. ECS Transactions, 2015, 68(1), 867. 5 Lv X W, Li Z J, Zhang J J, et al. Chemistry Letters, 2015, 44(1), 97. 6 Xie J, Li L, Tian C. Micro & Nano Letters, 2012, 7(7), 651. 7 Wang Y, Zhao J, Zhu Y, et al. Colloids and Surfaces A:Physicochemical and Engineering Aspects, 2013, 434, 296. 8 Wang Y, Zhao J, Zhou B, et al. Journal of Alloys and Compounds, 2014, 592, 296. 9 Zhang L, Hashimoto Y, Taishi T, et al. Applied Surface Science, 2011, 257(15), 6577. 10 Yu Z, Zhang J, Zhang H. Micro & Nano Letters, 2012, 7(8), 814. 11 Wang J L, Yang X D, Zhao K, et al. Journal of Materials Chemistry A, 2013, 1, 9069. 12 Liu X, Bian W, Tian C. Materials Letters, 2013, 112, 1. 13 Tseng T K, Choi J, Jung D W, et al. ACS Applied Materials & Interfaces, 2010, 2(4), 943. 14 Jing H, Chen X, Jiang X. Micro & Nano Letters, 2011, 6, 196. 15 Gou X, Li R, Wang G, et al. Nanotechnology, 2009, 20(49), 495501. 16 Liu B, Zeng H. Journal of the American Chemical Society, 2004, 126(26), 8124. 17 Huo Z, Chen C, Li Y. Chemical Communications, 2006, 33(33), 3522. 18 Liu J, Li Y D. Advanced Materials, 2007, 19(8), 1118. 19 Wang Y. Distinctive microstructures of bismuth (Ⅲ) oxide:Solution synthesis, growth mechanism and optical properties. Ph.D. Thesis, Jilin University, China, 2014(in Chinese). 王轶. 特殊结构氧化铋的液相合成、生长机理与光学性能. 博士学位论文, 吉林大学, 2014. 20 Blasse G, Hao Z. Materials Research Bulletin, 1984, 19(84), 1057. 21 Vila M, Díaz-Guerra C, Piqueras J. Materials Chemistry & Physics, 2012, 133(1), 559. 22 Zorenko Y, Gorbenko V, Voznyak T, et al. Journal of Luminescence, 2010, 130(10), 1963. 23 Srivastava A M. Journal of Luminescence, 1998, 78(4), 239. 24 Gaft M, Reisfeld R, Panczer G, et al. Optical Materials, 2001, 16(1), 279. 25 Kumari L, Lin J H, Ma Y R. Journal of Physics Condensed Matter, 2007, 19(40), 406204.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2019, Vol. 33 
