Synergistic effect of CH3CH2OH and H2O on morphology and photoluminescence of Bi2WO6 nanosheets
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摘要: 通过控制前驱体中乙醇与水的体积比,采用溶剂热法得到不同形貌的Bi2WO6纳米片,探讨了Bi2WO6形貌与光致发光性能之间的关系。Bi2WO6的结晶度、纳米片的棱长以及片层间距随醇水比增大而逐渐提高,当醇水比为1∶1时,Bi2WO6纳米片的棱长、片层间距和比表面积(BET)最大,表现出优异的光致发光性能;而在醇水比大于1∶1时,纳米片的棱长、片层间距和BET随之降低,光致发光性能继而减弱。以上表明醇水比为1∶1时,复配乙醇与水协同修饰Bi2WO6纳米片形貌的效果最佳,BET最大,从而促进其光致发光性能的改善。Abstract: Bi2WO6 nanosheets with different morphologies were synthesized by adjusting the ratios of CH3CH2OH to H2O using solvothermal method. Meanwhile, the effects of morphology on photoluminescence of Bi2WO6 nanosheets were explored. The crystalline, edges, and interlayer spacings of Bi2WO6 nanosheets were first enhanced and then reduced with the increase in proportion of CH3CH2OH in the solvent. When the ratio of CH3CH2OH to H2O was 1∶1, the values of edges, interlayer spacings and specific surface areas for the Bi2WO6 nanosheets were attained maximum, which contributed to the excellent photoluminescence. However, when the ratio was more than 1∶1, the values of edges, interlayer spacings and specific surface areas for Bi2WO6 nanosheets were reduced, which went against the improvement of photoluminescence. The results indicated that there was a synergistic effect of CH3CH2OH and H2O on the formation of morphology and the improvement of photoluminescence for Bi2WO6 nanosheets.
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Key words:
- Bi2WO6 /
- nanosheets /
- specific surface areas /
- photoluminescence
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