A new congruent-melting double phosphate PbCd(PO3)(4) with photocatalytic activity

作者：Zhou, Molin; Jiang, Xingxing; Xia, Mingjun; Huang, Hongwei; Lin, Zheshuai; Yao, Jiyong^*; Wu, Yicheng

来源：Journal of Alloys and Compounds, 2016, 689: 599-605.

DOI：10.1016/j.jallcom.2016.08.011

• Double phosphate
• Crystal structure
• Thermal property
• Optical property
• Photocatalytic property

By combining Pb2+ with ds-block elements, a new double phosphate PbCd(PO3)(4) has been synthesized for the first time. It crystallizes in space group P2(1)/n of the monoclinic system with unit cell parameters of a = 7.1191 (14) angstrom, b = 9.0871 (18) angstrom, c = 14.681 (3) angstrom, beta = 91.40 (3)degrees and Z = 4. Its structure contains (infinity)(1)[PO3] chains running along the a direction, which are further bridged by isolated [CdO6] triangular prisms to generate a 3D framework with Pb2+ cations filling in the cavities. Based on UV-vis-NIR spectroscopy measurement, PbCd(PO3)(4) has a large band gap of 4.85 (2) eV, which is consistent with the density functional theory (DFT) study. In addition, the DSC curve demonstrates that PbCd(PO3)(4) melts congruently at 727 degrees C. Additionally, the title compound displays a UV-photocatalytic activity to decompose RhB under 500 W mercury lamp (lambda = 256 nm) radiation about 0.62 times that of P25 (TiO2). Published by Elsevier B.V.

• 出版日期2016-12-25
• 单位中国科学院大学; 中国地质大学（北京）; 中国科学院理化技术研究所