催化学报

催化学报 ›› 2013, Vol. 34 ›› Issue (10): 1811-1815.DOI: 10.1016/S1872-2067(12)60691-3

• 研究快讯 • 上一篇    下一篇

用于木质素催化湿式氧化反应的纳米空心球钙钛矿催化剂

高鹏a,b, 李昌志a, 王华a, 王晓东a, 王爱琴a   

  1. a 中国科学院大连化学物理研究所, 辽宁大连116023;
    b 中国科学院大学, 北京100049
  • 收稿日期:2013-07-10 修回日期:2013-08-16 出版日期:2013-09-29 发布日期:2013-09-29
  • 基金资助:

    国家自然科学基金(21003121,21076211).

Perovskite hollow nanospheres for the catalytic wet air oxidation of lignin

Peng Gaoa,b, Changzhi Lia, Hua Wanga, Xiaodong Wanga, Aiqin Wanga   

  1. a State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China;
    b University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2013-07-10 Revised:2013-08-16 Online:2013-09-29 Published:2013-09-29
  • Contact: Aiqin Wang
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21003121 and 21076211).

PDF

599

被引次数

3

摘要：

利用尿素辅助溶剂热法合成了一系列LaFexMn1-xO3和La0.9Sr0.1MnO3纳米空心球材料,并采用X射线衍射、透射电子显微镜和物理吸附等方法对其晶相、形貌和比表面积进行了表征. 在木质素的催化湿式氧化反应(CWAO)中,该催化剂表现出比传统的柠檬酸溶胶-凝胶法制备的钙钛矿材料更高的催化活性. 这主要是由于空心球结构所致. 当T=120℃,p(O2)=0.2MPa时,CWAO反应1h后木质素转化率超过80%. 反应后组分离子溶出量很低,表明由于钙钛矿相结构的存在,催化剂在该反应条件下非常稳定.

关键词: 钙钛矿型氧化物, 木质素, 催化湿式氧化, 高催化活性, 低溶出值

Abstract:

A urea-assisted solvothermal-calcination method was used to prepare LaFexMn1-xO3 and La0.9Sr0.1MnO3 hollow nanospheres, and their crystal phase, morphology, and specific surface area properties were analyzed by X-ray diffraction, transmission electron microscopy, and nitrogen adsorption-desorption isotherms. These materials were then evaluated as catalysts for the catalytic wet air oxidation (CWAO) of lignin, and showed much better catalytic performance than perovskite prepared by the traditional sol-gel method. The structure of the hollow nanospheres has been suggested as the reason of this higher catalytic activity. For the CWAO reaction at 120 ℃ and 0.2 MPa O2, the conversion of lignin was greater than 80% after 1 h. Analysis of the ions leaching from the material following the completion of the reaction showed that the catalysts were very stable under the reaction conditions because of their perovskite phase structure.

Key words: Perovskite-type oxide, Lignin, Catalytic wet air oxidation, High catalytic activity, Low leaching