高等学校化学学报

高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (4): 701.

• 研究论文 • 上一篇    下一篇

ZnFe2O4中阳离子分布对苯酚H2O2羟化制苯二酚催化活性的影响

刘庆生, 于剑锋, 杨飘萍, 王振旅, 杨胥微, 吴通好   

  1. 吉林大学化学学院, 长春 130023
  • 收稿日期:2003-05-20 出版日期:2004-04-24 发布日期:2004-04-24
  • 通讯作者: 吴通好(1940年出生),男,教授,博士生导师,从事多相催化研究.E-mail:wth@mai.ljlu.edu.cn E-mail:wth@mai.ljlu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:29773016)资助

Influence of Cation Distribution of ZnFe2O4 on Its Catalytic Activityof Phenol Hydroxylation with H2O2

LIU Qing-Sheng, YU Jian-Feng, YANG Piao-Ping, WANG Zhen-Lü, YANG Xu-Wei, WU Tong-Hao   

  1. College of Chemistry, Jilin University, Changchun 130023, China
  • Received:2003-05-20 Online:2004-04-24 Published:2004-04-24

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摘要： 具有尖晶石结构的铁酸盐是苯酚H2O2羟化合成苯二酚的有效催化剂.分别用共沉淀和水热法制备了ZnFe2O4,并用Mossbauer,XRD和ESR等方法予以表征.发现不同方法制备的ZnFe2O4中阳离子在四面体和八面体位置的分布不同,认为阳离子分布影响了催化活性.

关键词: 尖晶石铁酸锌, 阳离子分布, 催化剂, 苯酚羟化

Abstract: The spinel ferrite exhibits a good catalytic performance in phenol hydroxylation by H2O2 to dihydroxybenzene. ZnFe2O4 was synthesized by co-precipitation and hydrothermal methods. The catalysts were characterized by means of Mossbauer spectroscopy, XRD and ESR techniques.The results of Mssbauer spectra, XRD and ESR all indicate that ZnFe2O4 synthesized from hydrothermal processing is the normal spinel structure, while ZnFe2O4 synthesized from co-precipitation method is partly inverse spinel with a substantial displacement of Fe3+ cations to A sites and Zn2+ cations into B sites of the cubic close-packed anionic sublattice. We found that the distribution of cations on tetrahedral and octahedral sites in zinc ferrites was different between the catalysts prepared by hydrothermal and co-precipitation methods, and the catalytic activity was influenced by the distribution of cations.

Key words: Spinel zinc ferrite, Distribution of cations, Catalyst, Phenol hydroxylation

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