Layered double hydroxides as efficient photocatalysts for visible-light degradation of Rhodamine B

作者：Xia, Sheng-Jie; Liu, Feng-Xian; Ni, Zhe-Ming^*; Xue, Ji-Long; Qian, Ping-Ping

来源：Journal of Colloid and Interface Science, 2013, 405: 195-200.

DOI：10.1016/j.jcis.2013.05.064

• Layered double hydroxides
• Photocatalysis under visible light
• Rhodamine B
• Kinetics
• Regeneration

A series of Zn/M-NO3-LDHs (M = Al, Fe, Ti, and Fe/Ti) have been synthesized by two different methods, and their activities for visible-light photocatalytic degradation on Rhodamine B (RB) were tested. Solids were analyzed by XRD, FT-IR, and ICP characterization, confirming the formation of pure LDH phase with good crystal structure. It was observed that the band gap of these nitrate LDH materials was following this order: Zn/Fe-NO3-LDH5 (2.55 eV) > Zn/Fe/Ti-NO3-LDHs (2.88 eV) > Zn/Ti-NO3-LDHs (3.03 eV) > Zn/Al-NO3-LDHs (3.23 eV); however, the degradation performance of RB by four materials followed the order: Zn/Ti-NO3-LDH5 (98%) > Zn/Al-NO3-LDH5 (96%) > Zn/Fe/Ti-NO3-LDHs (88%) > Zn/Fe-NO3-LDH5 (72%). In addition, a possible mechanism for photocatalytic degradation on RB has also been presumed. Moreover, after three regeneration cycles, the percentage of RB degradation rate was still close to 90%.

• 出版日期2013-9-1
• 单位浙江工业大学