Sheet-like orthorhombic MoO3 nanostructures prepared via hydrothermal approach for visible-light-driven photocatalytic application
Sheet-like orthorhombic MoO3 nanostructures prepared via hydrothermal approach for visible-light-driven photocatalytic application
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DOI：
10.1007/s11164-017-3190-2
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发表时间：
2018-03-01
影响因子：
3.3
通讯作者：
Alagan, Viswanathan
中科院分区：
文献类型：
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作者：
Rathnasamy, Rajeswari;Thangamuthu, Rangasamy;Alagan, Viswanathan
以七钼酸铵为钼源，硝酸为反应介质，采用简单的水热法制备了片状α-MoO 3纳米结构。合成的α-MoO 3 NS的结构和形态特征，使用各种分析技术。PXRD、FT-IR、拉曼和XPS光谱分析结果表明，生成了物相纯的α-MoO 3。SEM-EDX分析进一步证实了合成的α-MoO 3 NS的纯度。FE-SEM和HR-TEM结果表明，合成的α-MoO 3具有片状形貌。此外，所制备的α-MoO 3 NS可作为降解亚甲基蓝和罗丹明B染料的有效光催化剂。发现在90分钟照射时间内，对于两种有机染料均实现> 95%的染料降解效率。这种增强的光催化活性的α-MoO 3可以归因于在片状形态中存在更多的活性位点，这些活性位点更容易吸附有机染料并随后通过在可见光条件下分解而消除。[图形]。
In the present work, sheet-like alpha-MoO3 nanostructures (NS) were prepared by a simple hydrothermal method using ammonium heptamolybdate tetrahydrate as a molybdenum source and nitric acid. The synthesized alpha-MoO3 NS have been characterized structurally and morphologically using various analytical techniques. The PXRD, FT-IR, Raman and XPS spectroscopic analysis results revealed the formation of phase pure alpha-MoO3. The SEM-EDX analysis further confirms the purity of the synthesized alpha-MoO3 NS. FE-SEM and HR-TEM results indicated that the synthesized alpha-MoO3 has sheet-like morphology. Further, the obtained alpha-MoO3 NS could be used as the effective photocatalyst for the degradation of methylene blue and rhodamine B dyes. It was found that > 95% dye degradation efficiency was achieved for both the organic dyes within 90 min irradiation times. This enhanced photocatalytic activity of alpha-MoO3 can be attributed to the presence of a greater number of active sites in the sheet-like morphology that are more vulnerable for adsorption of organic dyes and subsequent elimination by decomposition under visible-light condition.[GRAPHICS].