Effects of carbon content on the photocatalytic activity of C/BiVO4 composites under visible light irradiation
Effects of carbon content on the photocatalytic activity of C/BiVO4 composites under visible light irradiation
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DOI：
10.1016/j.matchemphys.2009.08.028
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发表时间：
2010-01
影响因子：
4.6
通讯作者：
D. Lee;I. Cho;Sangwook Lee;Shin-Tae Bae;J. Noh;Dong‐Wan Kim;K. Hong
中科院分区：
文献类型：
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作者：
D. Lee;I. Cho;Sangwook Lee;Shin-Tae Bae;J. Noh;Dong‐Wan Kim;K. Hong
采用浸渍法制备了碳负载BiVO4复合光催化剂，并考察了其在可见光照射下光催化降解罗丹明B染料溶液的能力。所制备的复合光催化剂通过X射线衍射（XRD）、场发射电子显微镜（FESEM）、高分辨率透射电子显微镜（HRTEM）、Brunauer-Emmett-Teller（BET）表面积测量和紫外-可见漫反射光谱进行表征。我们发现碳很好地分散在 BiVO4 的表面。复合光催化剂在可见光照射（>420nm）下降解水溶液中罗丹明B（RhB）的光催化活性高于纯BiVO4。此外，随着碳含量增加至3wt%，降解效率增加。结合表面积、光吸收特性和电荷分离来讨论增强光催化活性的机制。
Carbon-loaded BiVO4composite photocatalysts were prepared using an impregnation method, and their ability to photocatalytically degrade Rhodamine B dye solution under visible light irradiation was investigated. The prepared composite photocatalysts were characterized by X-ray diffraction (XRD), field-emission electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), Brunauer–Emmett–Teller (BET) surface area measurements, and UV–vis diffuse reflectance spectra. We found that the carbon was well-dispersed on the surface of BiVO4. The photocatalytic activity of the composite photocatalysts for the degradation of Rhodamine B (RhB) in aqueous solution under visible light irradiation (>420nm) was higher than that of pure BiVO4. Moreover, the degradation efficiency increased as the carbon content increased up to 3wt%. The mechanism of enhanced photocatalytic activity is discussed with reference to surface area, optical absorption properties, and charge separation.