Bi2MoxW1-xO6固溶体的水热合成、表征及光催化性能

doi:10.3724/SP.J.1077.2013.13095

无机材料学报 ›› 2013, Vol. 28 ›› Issue (12): 1275-1280.DOI: 10.3724/SP.J.1077.2013.13095 CSTR: 32189.14.SP.J.1077.2013.13095

• 研究论文 • 下一篇

Bi₂Mo_xW_1-xO₆固溶体的水热合成、表征及光催化性能

宋继梅, 胡海琴, 王秀芝, 赵绍娟, 师亚利, 任明松

(安徽大学化学化工学院, 功能无机材料化学重点实验室, 合肥 230601)

收稿日期:2013-02-25 修回日期:2013-04-25 出版日期:2013-12-20 网络出版日期:2013-11-15
基金资助:
国家自然科学基金(21171002); 安徽省自然科学基金(11040606M55); 安徽省教育厅自然科学基金(KJ2010A015)

Hydrothermal Synthesis, Characterization and Photocatalytic Activities of Bi₂Mo_xW_1-xO₆ Solid Solution

SONG Ji-Mei, HU Hai-Qin, WANG Xiu-Zhi, ZHAO Shao-Juan, SHI Ya-Li, REN Ming-Song

(College of Chemistry and Chemical Engineering, Anhui University, Key Laboratory of Anhui Province of Functional Inorganic Materials Chemistry, Hefei 230601, China)

Received:2013-02-25 Revised:2013-04-25 Published:2013-12-20 Online:2013-11-15
Supported by:
National Natural Science Foundation of China (21171002); Natural Science Foundation of Anhui Province (11040606M55); Foundation of Education Committee of Anhui Province (KJ2010A015)

摘要/Abstract

摘要： 采用水热法成功合成了一系列Bi₂Mo_xW_1-xO₆(x=0~1)固溶体, 通过XRD、DRS、FT-IR等方法对合成产物进行了表征。随着产物中Mo含量的增加, XRD图谱位于2θ=33°、47°、56°处的峰逐渐发生分裂, I(131)/I(200)比值先逐渐增大后缓慢降低; 红外光谱的金属-氧键的振动频率由821 cm^-1逐渐蓝移至842 cm^-1。表明生成了互溶的固溶体; 借助DRS测得样品的带隙分别为2.75、2.55、2.50、2.45、2.59、2.63 eV(x=0、0.25、0.50、0.75、0.9、1)。可见光下, 以罗丹明B为目标降解物进行了合成产物的光催化性能测试。结果显示: Bi₂Mo_0.75W_0.25O₆固溶体的光催化活性最高。固溶体特殊的结构和较窄的带隙是影响光催化效果的主要因素。

关键词: 固溶体, 水热合成, 光催化性能, 带隙

Abstract: Bi₂Mo_xW_1-xO₆(x=0~1) solid solutions were successfully synthesized via a facile hydrothermal method. The obtained products were characterized by X-ray diffraction, UV-Vis diffuse reflectance spectra and FT-IR spectrum. With an increase of Mo content, XRD patterns of the as-synthesized products show that the peaks at 2θ=33°, 47°, 56° gradually split, and the value of I(131)/I(200) gradually increases and then slowly decreases. FT-IR absorb band around 821 cm^-1, which refered to the vibration frequency of the metal-oxygen band, is monotonically shifted to 842 cm^-1. According to DRS calculations, the band gap of the samples are 2.75, 2.55, 2.50, 2.45, 2.59 and 2.63 eV when x is 0, 0.25, 0.5, 0.75, 0.9 and 1, respectively. This result demonstrates the formation of soluble solid solution. The photocatalytic activities of the products were evaluated by monitoring the degradation of RhB under visible light. It is found that, among solid solutions, the Bi₂Mo_0.75W_0.25O₆exhibites the highest photocatalytic activity which mainly attributes to the special structure of solid solution and the lower energy band gap.

Key words: 固溶体, 水热合成, 光催化性能, 带隙

中图分类号:

O641

宋继梅, 胡海琴, 王秀芝, 赵绍娟, 师亚利, 任明松. Bi₂Mo_xW_1-xO₆固溶体的水热合成、表征及光催化性能[J]. 无机材料学报, 2013, 28(12): 1275-1280.

SONG Ji-Mei, HU Hai-Qin, WANG Xiu-Zhi, ZHAO Shao-Juan, SHI Ya-Li, REN Ming-Song. Hydrothermal Synthesis, Characterization and Photocatalytic Activities of Bi₂Mo_xW_1-xO₆ Solid Solution[J]. Journal of Inorganic Materials, 2013, 28(12): 1275-1280.

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Bi₂Mo_xW_1-xO₆固溶体的水热合成、表征及光催化性能

Hydrothermal Synthesis, Characterization and Photocatalytic Activities of Bi₂Mo_xW_1-xO₆ Solid Solution

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