Rose-like I-doped Bi2O2CO3microspheres with enhanced visible light response: DFT calculation, synthesis and photocatalytic performance.
Based on the crystal structure and the DFT calculation of Bi2O2CO3, I-can partly replace the CO32-in Bi2O2CO3to narrow its bandgap and to enhance its visible light absorption. With this in mind, rose-like I-doped Bi2O2CO3microspheres were prepared via a hydrothermal process. This method can also be extended to synthesize rose-like Cl- or Br-doped Bi2O2CO3microspheres. Photoelectrochemical test supports the DFT calculation result that I- doping narrows the bandgap of Bi2O2CO3by forming two intermediate levels in its forbidden band. Further study reveals that I-doped Bi2O2CO3microspheres with optimized composition exhibit the best photocatalytic activity. Rhodamine B can be completely degraded within 6min and about 90% of Cr(VI) can be reduced after 25min under the irradiation of visible light (λ>400nm).
Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, PR China.
Jiantao
J
Zai
Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, PR China.
Fenglei
F
Cao
Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, PR China.
Na
N
Liang
Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, PR China.
Ke
K
Yu
Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, PR China.
Yuan
Y
Tian
Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, PR China.
Huai
H
Sun
Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, PR China. Electronic address: xfqian@sjtu.edu.cn.
Xuefeng
X
Qian
Bi(2)O(2)CO(3); Cr (VI) reduction; Halogen doped; Visible light photocatalysis