Bi12SiO20多级立方块的水热合成、表征及光催化性能

doi:10.7503/cjcu20150413

高等学校化学学报 ›› 2015, Vol. 36 ›› Issue (12): 2372.doi: 10.7503/cjcu20150413

• 研究论文: 无机化学 • 上一篇下一篇

Bi₁₂SiO₂₀多级立方块的水热合成、表征及光催化性能

张想¹, 张雷¹(), 邹玥¹, 黄新华¹, 潘成岭¹(), 侯长民², 徐吉庆²

1. 安徽理工大学材料科学与工程学院, 多尺度材料与分子催化实验室, 淮南 232001
2. 吉林大学化学学院, 无机合成与制备化学国家重点实验室, 长春 130012

收稿日期:2015-05-20 出版日期:2015-12-10 发布日期:2015-11-19
作者简介:联系人简介: 张雷, 男, 博士, 讲师, 主要从事微纳米材料的液相制备及性能调控研究. E-mail:yutian1224@126.com;潘成岭, 男, 博士, 教授, 主要从事复合材料性能研究. E-mail:chengling_pan@126.com
基金资助:
国家自然科学基金(批准号: 21201006)、安徽省自然科学基金(批准号: 1308085QB34)、高等学校博士学科点专项科研基金(批准号: 20123415120002)和无机合成与制备化学国家重点实验室开放课题基金(批准号: 2015-28)资助

Hydrothermal Synthesis, Characterization and Photocatalytic Activities of Nanosheets-assembled Bi₁₂SiO₂₀ Microcubes^†

ZHANG Xiang¹, ZHANG Lei^1,^*(), ZOU Yue¹, HUANG Xinhua¹, PAN Chengling^1,^*(), HOU Changmin², XU Jiqing²

1. Laboratory of Multiscale Materials and Molecular Catalysis, School of Materials Science and Engineering,Anhui University of Science and Technology, Huainan 232001, China
2. State Key Laboratory of Inorganic Synthesis & Preparative Chemistry, College of Chemistry,Jilin University, Changchun 130012, China

Received:2015-05-20 Online:2015-12-10 Published:2015-11-19
Contact: ZHANG Lei,PAN Chengling E-mail:yutian1224@126.com;chengling_pan@126.com
Supported by:
† Supported by the National Natural Science Foundation of China(No.21201006), the Natural Science Foundation of Anhui Province, China(No.1308085QB34), the Special Research Fund for the Doctoral Program of Higher Education, China(No.269 20123415120002) and the Open Fund of the State Key Laboratory of Inorganic Synthesis & Preparative Chemistry, China(2015-28)

摘要/Abstract

摘要：

以硝酸铋、硅酸钠、聚丙烯酰胺(PAM)和柠檬酸三钠(Na₃Cit)为原料, 氢氧化钠为矿化剂, 采用温和的水热合成法制备了软铋矿相硅酸铋Bi₁₂SiO₂₀(BSO)立方块. 利用X射线粉末衍射仪、扫描电子显微镜、能量色散谱仪、傅里叶变换红外光谱仪、高分辨透射电子显微镜、选区电子衍射仪和X射线光电子能谱仪等对BSO的物相和微观形貌进行了表征. 结果表明, BSO立方块由许多单晶纳米片层-层组装而成, 整个立方块的边长约为1~2 μm. 研究发现, 一些实验参数如反应时间, 反应温度和添加剂(PAM和Na₃Cit)的引入对BSO多级结构的形成具有非常重要的影响. 光催化实验结果表明, 在紫外-可见光的辐照下, BSO多级立方块对罗丹明B(RhB)具有优良的光催化活性, 照射75 min后降解率可达到97.5%.

关键词: 多级立方块, 半导体, 水热合成, 晶体生长, 光催化活性

Abstract:

Novel nanosheet-assembled Bi₁₂SiO₂₀ microcubes were prepared via a facile hydrothermal synthesis approach. The phase and morphology of the product were characterized by X-ray diffraction, energy dispersive spectrometry, selected area electron diffraction, X-ray photoelectron spectrometry, high resolution transmission electron microscopy and scanning electron microscopy. Experimental results indicated that as-prepared Bi₁₂SiO₂₀ sample was assembled by many nanosheets. Some influencing factors including reaction time, temperature and the presence of additives(e.g., polyacrylamide, sodium citrate and sodium hydroxide) were revealed to play crucial roles in the generation of Bi₁₂SiO₂₀ nanoarchitecture. Moreover, the photocatalytic experiments indicated that the as-prepared Bi₁₂SiO₂₀ product exhibited excellent photocatalytic activities and the degradation rate of RhB could reach to 97.5% under the irradiation of UV-Vis light.

Key words: Hierarchical microcube, Semiconductor, Hydrothermal synthesis, Crystal growth, Photocatalytic activity

中图分类号:

O614

TrendMD:

张想, 张雷, 邹玥, 黄新华, 潘成岭, 侯长民, 徐吉庆. Bi₁₂SiO₂₀多级立方块的水热合成、表征及光催化性能. 高等学校化学学报, 2015, 36(12): 2372.

ZHANG Xiang, ZHANG Lei, ZOU Yue, HUANG Xinhua, PAN Chengling, HOU Changmin, XU Jiqing. Hydrothermal Synthesis, Characterization and Photocatalytic Activities of Nanosheets-assembled Bi₁₂SiO₂₀ Microcubes^†. Chem. J. Chinese Universities, 2015, 36(12): 2372.

图/表 10

Fig.1 XRD pattern(A) and EDS spectrum(B) of BSO hierarchical microcubes prepared at 150 ℃ for 24 h

Fig.2 XPS spectra of BSO hierarchical microcubes prepared at 150 ℃ for 24 h (A) Survey spectrum; (B) B i 4 f ; (C) S i 2 p ; (D) O 1 s .

Fig.3 Raman(A) and FTIR(B) spectra of hierarchical BSO microcubes prepared at 150 ℃ for 24 h

Fig.4 SEM(A, B), TEM(C and inset) and SAED(D) images of hierarchical BSO microcubes prepared at 150 ℃ for 24 h

Fig.5 SEM images(A—C) and XRD patterns(D) of the samples prepared in the absence of PAM and/or Na3Cit (A) and a. Without Na3Cit; (B) and b. without PAM; (C) and c. without PAM and Na3Cit.

Fig.6 SEM images(A, B) and XRD(C, D) patterns of the samples prepared at different reaction temperatures Reaction temperature/℃: (A), (C) 120; (B), (D) 180.

Fig.7 SEM images(A, B) and XRD patterns(C, D) of the samples prepared with different reaction time Reaction time/h: (A), (C) 12; (B), (D) 36.

Fig.8 DRS spectrum and the (αhν)2 -E plots(inset) of hierarchical BSO microcubes prepared at 150 ℃ for 24 h

Fig.9 Photodegradation efficiencies of RhB as a function of irradiation time with UV-Vis light a. Photolysis; b. BSO prepared without sodium citrate; c. BSO prepared without PAM; d. BSO hierarchical microcubes.

Fig.10 Photocatalytic degradation efficiencies of RhB with or without quenchers under UV-Vis light Irradiation time: 75 min.

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Bi₁₂SiO₂₀多级立方块的水热合成、表征及光催化性能

Hydrothermal Synthesis, Characterization and Photocatalytic Activities of Nanosheets-assembled Bi₁₂SiO₂₀ Microcubes^†

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