Preparation and photocatalytic properties ofBi2MoO6/ZnO composite
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摘要: 采用两步水热法合成由纳米片组装而成的三维Bi2MoO6/ZnO微花，通过调控复合物中Bi2MoO6，制备一系列不同摩尔比的Bi2MoO6/ZnO微花. 研究表明，Bi2MoO6/ZnO−10%复合材料在可见光照射20 min后，对罗丹明B（RhB）溶液的光催化降解率达到79.61%，相较于纯ZnO和Bi2MoO6，复合材料具有更好的光催化性能. 通过紫外可见光谱（UV−Vis）和室温荧光光谱（PL）分析推测，由于复合材料的光吸收范围提高和异质结的形成抑制了光生载流子的复合，进而提升了Bi2MoO6/ZnO微花光催化性能.Abstract: Three-dimensional Bi2MoO6/ZnO microflowers composed of nano-sheets were synthesized by two-step hydrothermal method. By changing the content of Bi2MoO6 in the composite, a series of Bi2MoO6/ZnO microflowers with different molar ratios were prepared. The results showed that the photocatalytic degradation rate of Bi2MoO6/ZnO−10% composite to RhB solution reached 79.61% after 20 min of visible light irradiation. Compared with pure ZnO and Bi2MoO6, the composite had better photocatalytic performance. Through the analysis of ultraviolet visible (UV−Vis) spectrum and room temperature fluorescence spectra (PL), it is further speculated that the improvement of the photocatalytic performance of Bi2MoO6/ZnO microflora is due to the improvement of the optical absorption range of the composite and the formation of heterojunction, which inhibits the recombination of photogenerated carriers.
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Key words:
- hydrothermal method /
- self-assembly /
- photocatalysis
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图 1 ZnO、Bi2MoO6和BMO/ZnO−10%的XRD图谱
Figure 1. XRD patterns of ZnO, Bi2MoO6 and BMO/ZnO−10%
图 2 ZnO、Bi2MoO6、BMO/ZnO−10%的SEM图像
Figure 2. SEM images of ZnO, Bi2MoO6 and BMO/ZnO−10%
图 3 样品的紫外−可见吸收光谱及其带隙分析
Figure 3. UV−Visible absorption spectrum and band gap analysis of samples
图 4 ZnO、Bi2MoO6和BMO/ZnO−10%的红外光谱
Figure 4. FTIR spectra of ZnO, Bi2MoO6 and BMO/ZnO−10%
图 5 ZnO和BMO/ZnO−10%复合材料的光致发光谱
Figure 5. Photoluminescence spectrum of ZnO and BMO/ZnO−10% composite material
图 7 有无捕获剂时BMO/ZnO−10%的光催化性能
Figure 7. Photocatalytic properties of BMO/ZnO−10% sample with/without scavenger
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