Effective charge separation in BiOI/Cu2O composites with enhanced photocatalytic activity
Effective charge separation in BiOI/Cu2O composites with enhanced photocatalytic activity
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DOI：
10.1088/2053-1591/aaa9ee
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发表时间：
2018-02
影响因子：
2.3
通讯作者：
Yongmei Xia;Zuming He;Wei Yang;Bin Tang;Y. Lu;K. Hu;Jiangbin Su;Xiaoping Li
中科院分区：
文献类型：
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作者：
Yongmei Xia;Zuming He;Wei Yang;Bin Tang;Y. Lu;K. Hu;Jiangbin Su;Xiaoping Li
首次采用耦合还原法在低温下合成了新型BiOI/Cu 2 O复合材料。采用XRD、XPS、SEM、EDS、HRTEM、UV-vis（DRS）、FTIR和光电化学（PEC）等手段对样品进行了表征。结果表明，BiOI/Cu 2 O复合材料由BiOI纳米片和Cu 2 O立方亚微米结构组成的三维、分级的菜花状结构组成，复合材料的吸收带变宽，可见光区的吸收强度增强。BiOI/Cu 2 O复合材料具有良好的光催化性能，这可能是由于BiOI/Cu 2 O复合材料的复合吸附和有效的电荷分离能力提高所致。此外，还提出了可能的光催化机理。
Novel BiOI/Cu2O composites were designed and synthesized for the first time by coupling reduction method at low temperature. The samples were characterized by XRD, XPS, SEM, EDS, HRTEM, UV–vis (DRS), FTIR and photo-electro-chemical (PEC) analysis. Results showed that the BiOI/Cu2O composites consisted of three-dimensional (3D), hierarchical cauliflower-like structure composed of BiOI nanosheet and Cu2O cubic submicrometer structure, the composite absorption band broadened, and the absorption intensity in the visible region strengthened. And the composites exhibited an excellent photocatalytic performance, which might be attributed to the improvement of the composite absorption and effective charge separation in BiOI/Cu2O composites. In addition, the possible photocatalytic mechanism was proposed.