Dramatic Activity of C3N4/BiPO4 Photocatalyst with Core/Shell Structure Formed by Self-Assembly
Dramatic Activity of C3N4/BiPO4 Photocatalyst with Core/Shell Structure Formed by Self-Assembly
复制标题
自组装形成核/壳结构的 C3N4/BiPO4 光催化剂的显着活性
DOI：
10.1002/adfm.201102306
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发表时间：
2012-04-10
影响因子：
19
通讯作者：
Zhu, Yongfa
中科院分区：
文献类型：
--
作者：
Pan, Chengsi;Xu, Jing;Zhu, Yongfa
采用超声分散法制备了核/壳结构的C3N4/BiPO4光催化剂。壳层的厚度可以通过调节分散体中C3N4的量来控制，这决定了光催化活性的增强水平。在紫外光照射下，当C3N4/BiPO4的质量比为4%(C3N4/BiPO4)时，C3N4/BiPO4的最佳光催化活性几乎是参考P25(二氧化钛)的4.5倍，是BiPO4的2.5倍。更吸引人的是，由于负载了C3N4，产生了戏剧性的可见光催化活性。性能的提高是由于C3N4和BiPO4之间的晶格和能级的匹配。这种匹配有助于光生电子空穴对在异质结界面处的分离和转移，对于其他核/壳结构材料可能是重要的。此外，该方法有望推广到其他C3N4负载材料。
Core/shell structured C3N4/BiPO4 photocatalyst is fabricated via a facile ultrasonic dispersion method. The thickness of the shell may be controlled by tuning the amount of C3N4 in the dispersion, which determines the enhanced level of photocatalytic activity. The optimum photocatalytic activity of C3N4/BiPO4 at a weight ratio of 4% (C3N4/BiPO4) under UV irradiation is almost 4.5 times as high as that of reference P25 (TiO2) and 2.5 times of BiPO4. More attractively, the dramatic visible light photocatalytic activity is generated due to the C3N4 loaded. The enhancement in performance is demonstrated to be the match of lattice and energy level between the C3N4 and BiPO4. This match facilitates the separation and transfer of photogenerated electronhole pairs at the heterojunction interfaces and may be important for other core/shell structured materials. In addition, this method is expected to be extended for other C3N4 loaded materials.