A g-C3N4/Bi2O2CO3 composite with high visible-light-driven photocatalytic activity for rhodamine B degradation
A g-C3N4/Bi2O2CO3 composite with high visible-light-driven photocatalytic activity for rhodamine B degradation
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DOI：
10.1016/j.apsusc.2014.10.071
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发表时间：
2014-12
影响因子：
6.7
通讯作者：
Na Tian;Hongwei Huang;Yuxi Guo;Ying He;Yihe Zhang
中科院分区：
文献类型：
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作者：
Na Tian;Hongwei Huang;Yuxi Guo;Ying He;Yihe Zhang
采用简单的混合煅烧法合成了新型复合光催化剂g-C3N4/Bi2O2CO3。采用X射线衍射（XRD）、傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）和漫反射光谱（DRS）对催化剂进行了表征。在可见光下，g-C3N4/Bi2O2CO3复合材料对罗丹明B（RhB）有很好的降解效果。在可见光照射下，摩尔比为1：2的g-C3N4/Bi2O2CO3的最佳光催化活性分别是纯g-C3N4和Bi2O2CO3的3.1和14.2倍。g-C_3N_4/Bi_2O_2CO_3可见光催化活性的提高应归因于有效的分离和转移来自良好匹配的重叠能带结构的光生电荷。光致发光谱和活性物种捕集实验结果验证了光催化反应机理。
Novel composite photocatalyst g-C3N4/Bi2O2CO3has been synthesized by a simple mixed-calcinations method. The photocatalysts were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and diffuse reflection spectroscopy (DRS). The g-C3N4/Bi2O2CO3composites showed high efficiency for the degradation of Rhodamine B (RhB) under visible light. The optimum photocatalytic activity of g-C3N4/Bi2O2CO3with molar ratio of 1:2 under visible light irradiation was almost 3.1 and 14.2 times as high as those of the pure g-C3N4and Bi2O2CO3, respectively. The enhancement of visible light photocatalytic activity in g-C3N4/Bi2O2CO3should be assigned to the effective separation and transfer of photogenerated charges originating from the well-matched overlapping band-structures. The supposed photocatalytic mechanism was verified by the result of photoluminescence spectroscopy (PL) and active species trapping experiments.