Bi_(2)MoO_(6)/ZnO复合材料的制备及光催化性能

Preparation and photocatalytic properties of Bi_(2)MoO_(6)/ZnO composite

采用两步水热法合成由纳米片组装而成的三维Bi_(2)MoO_(6)/ZnO微花,通过调控复合物中Bi_(2)MoO_(6),制备一系列不同摩尔比的Bi_(2)MoO_(6)/ZnO微花.研究表明,Bi_(2)MoO_(6)/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Bi_(2)MoO_(6),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Bi_(2)MoO_(6)/ZnO微花光催化性能.

Three-dimensional Bi_(2)MoO_(6)/ZnO microflowers composed of nano-sheets were synthesized by twostep hydrothermal method.By changing the content of Bi_(2)MoO_(6) in the composite,a series of Bi_(2)MoO_(6)/ZnO microflowers with different molar ratios were prepared.The results showed that the photocatalytic degradation rate of Bi_(2)MoO_(6)/ZnO−10%composite to RhB solution reached 79.61%after 20 min of visible light irradiation.Compared with pure ZnO and Bi_(2)MoO_(6),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 Bi_(2)MoO_(6)/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.