›› 2020, Vol. 22 ›› Issue (4): 56-62.

• Catalyst Research • 上一篇    下一篇

Synergistic effect between Zr-MOF and phosphotungstic acid for oxidative desulfurization

宗梦雅,赵雨桐,范存正,王丹红   

  1. 南开大学材料科学与工程学院
  • 收稿日期:2020-04-03 修回日期:2020-06-21 出版日期:2020-12-30 发布日期:2020-12-30
  • 通讯作者: 王丹红 E-mail:dhwang@nankai.edu.cn

Synergistic effect between Zr-MOF and phosphotungstic acid for oxidative desulfurization

Meng-Ya ZongYu-Tong ZHAO2,Cun-Zheng FanDan-Hong WANG3   

  • Received:2020-04-03 Revised:2020-06-21 Online:2020-12-30 Published:2020-12-30
  • Contact: Dan-Hong WANG E-mail:dhwang@nankai.edu.cn

摘要: PTA/UiO-66 composites were successfully synthesized by the hydrothermal method. The results showed that the synergistic effect between phosphotungstic acid (PTA) and UiO-66 could enhance the oxidative desulfurization (ODS) activity. The XRD results proved that UiO-66 remtained its structure in the PTA/UiO-66 composites. The SEM results showed that the PTA/UiO-66 catalysts exhibited regular octahedral shape. The Raman spectra revealed that PTA in the composites remtained the Keggin structure. The XPS results showed that the electron transfer occurred from Zr-MOF to PTA. The ODS reaction mechanism was discussed. Electrons transfer from Zr-MOF to PTA can promote the generation of active species (?OH) and thus enhance the ODS activity. This explanation can be confirmed by the formation of oxygen vacancy and W0 as revealed by the XPS analysis.

关键词: phosphotungstic acid, Zr-MOF, oxidative desulfurization, synergistic effect, oxygen vacancy

Abstract: PTA/UiO-66 composites were successfully synthesized by the hydrothermal method. The results showed that the synergistic effect between phosphotungstic acid (PTA) and UiO-66 could enhance the oxidative desulfurization (ODS) activity. The XRD results proved that UiO-66 remtained its structure in the PTA/UiO-66 composites. The SEM results showed that the PTA/UiO-66 catalysts exhibited regular octahedral shape. The Raman spectra revealed that PTA in the composites remtained the Keggin structure. The XPS results showed that the electron transfer occurred from Zr-MOF to PTA. The ODS reaction mechanism was discussed. Electrons transfer from Zr-MOF to PTA can promote the generation of active species (?OH) and thus enhance the ODS activity. This explanation can be confirmed by the formation of oxygen vacancy and W0 as revealed by the XPS analysis.

Key words: phosphotungstic acid, Zr-MOF, oxidative desulfurization, synergistic effect, oxygen vacancy