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利用尿素辅助溶剂热法合成了一系列LaFex Mn1-x O3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=120oC,p(O2)=0.2 MPa时,CWAO反应1 h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.
A series of LaFex Mn1-x O3 and La0.9Sr0.1MnO3 hollow nanospheres were synthesized by urea-assisted solvothermal method. Their crystal phases, morphology and specific surface area were characterized by X-ray diffraction, transmission electron microscopy and physical adsorption Was characterized in the catalytic wet oxidation of lignin (CWAO), which shows a higher catalytic activity than the traditional citric acid sol-gel prepared perovskite material.This is mainly due to the hollow sphere structure , The lignin conversion rate exceeded 80% at 1 h after CWAO reaction at T = 120oC and p (O2) = 0.2 MPa, and the content of ionic leaching was very low after the reaction, indicating that due to the phase structure of perovskite, The catalyst is very stable under the reaction conditions.