王康, 董安华, 张业岭, 朱士贞, 郝艳丽
AuthorsHTML:王康, 董安华, 张业岭, 朱士贞, 郝艳丽
AuthorsListE:Wang Kang, Dong Anhua, Zhang Yeling, Zhu Shizhen, Hao Yanli
AuthorsHTMLE:Wang Kang, Dong Anhua, Zhang Yeling, Zhu Shizhen, Hao Yanli
Unit:天津大学化工学院，天津 300072
Unit_EngLish:School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
Abstract_Chinese:通过海藻酸辅助法制备了质量CeO₂/γ-Al₂O₃ 催化剂, 探讨了浸渍与共混负载方式对催化臭氧化降解亚甲基蓝(MB)效果的影响．通过改变亚甲基蓝质量浓度与操作pH值, 以及连续使用和重复使用实验, 表明共混负载催化剂的COD去除率及操作稳定性均高于浸渍负载催化剂; XRD、NH₃-TPD、红外、N₂ 吸附-脱附与SEM测试结果表明共混负载制备的催化剂中CeO₂的晶相相对较高、催化剂表面酸性强, 羟基多且催化剂比表面积相对较大, 这些特性有利于提高共混负载催化剂的催化能力与操作稳定性．
Abstract_English:The catalyst support used in this study is spherical γ-Al₂O₃ synthesized by alginate assisted sol-gel method，and the degradation of methylene blue(MB)-contained wastewater by catalytic ozonation over alumina with the addition of CeO₂ by impregnation or co-blending was investigated. By altering the initial mass concentration of MB and pH value and through successive and repeated usage experiments of the catalysts，it was found that the COD removal and the operative stability over CeO₂/γ-Al₂O₃ catalyst prepared by co-blending were better than those prepared by impregnation. A number of characterizations such as XRD，NH₃-TPD，IR-spectra，N₂ adsorption-desorption and SEM were carried out，which illustrated that the CeO₂/γ-Al₂O₃ catalyst prepared by co-blending had a stronger crystalline of CeO₂，a stronger exterior acid，a larger surface area and more external hydroxyl radicals. All of the features of the catalysts attribute to the enhancement of the performance and operative stability.
Keyword_Chinese:CeO₂/γ-Al₂O₃; 催化臭氧化; 亚甲基蓝; 共混; 浸渍; 稳定性
Keywords_English:CeO₂/γ-Al₂O₃; catalytic ozonation; methylene blue(MB); co-blending; impregnation; stability

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