Bi9P2O18Cl的相变及其可见光催化水产氢
Bi9P2O18Cl: Phase Transition and Hydrogen Production by Photocatalytic Water-Splitting
作者单位E-mail
操振宇 西北大学物理学院, 西安 710069  
吴耘 西北大学物理学院, 西安 710069  
高建华 西北大学物理学院, 西安 710069 gaojh@nwu.edu.cn 
摘要: 采用高温熔盐法制备了Bi9P2O18Cl单晶。单晶X射线衍射分析表明Bi9P2O18Cl从室温到低温发生晶体到晶体的相变。室温下,该化合物(α相)属于单斜空间群P21/m (11),单胞参数: a=1.149 10(7) nm,b=0.540 64(4) nm,c=1.463 69(9) nm,β=93.741(6)°,V=0.907 38(10) nm3;而在100 K下,该化合物(β相)属于单斜空间群P21/n (14),单胞参数: a=1.790 56(4) nm,b=0.538 870(10) nm,c=1.915 57(4) nm,β=103.693(2)°,V=1.795 76(6) nm3。另外,采用高温固相反应法,合成了高纯的Bi9P2O18Cl粉末样品,该样品展示了较好的光催化产氢性能,产氢量可达33.69 μmol·g-1·h-1
关键词: Aurivillius  晶体结构  相变  光解水产氢
基金项目: 陕西省自然科学基础研究计划项目(No.2022JM-199)资助。
Abstract: Bi9P2O18Cl crystals were prepared by the high-temperature molten salt method. Single-crystal X-ray diffraction data analyses demonstrated that Bi9P2O18Cl can undergo a crystal-to-crystal phase transition from room temperature to low temperature. At room temperature, this compound (α-phase) crystallizes in monoclinic space group P21/m (11) with unit cell parameters a=1.149 10(7) nm, b=0.540 64(4) nm, c=1.463 69(9) nm, β=93.741(6)°, V=0.907 38(10) nm3. And at 100 K, it (β-phase) crystallizes in monoclinic space group P21/n (14) with unit cell parameters a=1.790 56(4) nm, b=0.538 870(10) nm, c=1.915 57(4) nm, β=103.693(2)°, V=1.795 76(6) nm3. Additionally, high pure powder samples of Bi9P2O18Cl were synthesized using solid-state reaction method, which exhibited promising performance in photocatalytic water splitting to produce H2, the H2 evolution rates reached 33.69 μmol·g-1·h-1.
Keywords: Aurivillius  crystal structure  phase transition  photocatalytic hydrogen production
投稿时间:2021-12-20 修订日期:2022-03-18
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操振宇,吴耘,高建华.Bi9P2O18Cl的相变及其可见光催化水产氢[J].无机化学学报,2022,38(5):969-976.
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