本论文中，分别以溶胶凝胶法和共沉淀法制备臭氧分解催化剂活性中心为Cu-Mn催化剂。利用陶瓷粘结剂（包括Al溶胶），将制得的Cu-Mn催化剂粉末喷涂于Al-Si-O陶瓷载体上，获得性能稳定成品。实验过程中采用XRD、SEM等探测催化中心的结构和形貌。在紫外光下，靛蓝胭脂红的光降解率表征Cu-Mn催化剂的催化活性。结果表明：以共沉淀法制备的5%铜掺杂催化活性中心具有较好的催化活性，其结构主要为Mn3O4，存在多重氧化态的Mn，利于臭氧分解；催化中心颗粒分布比较均匀，颗粒度约在１um左右。此种催化剂制备方法的成本低，能耗小，步骤简便，便于工业化生产。6710
关键词：臭氧；催化剂；溶胶凝胶；催化性能；Cu-Mn
Abstract
In this paper, Cu-Mn catalyst for the Ozone degradation was prepared by sol-gel and co-precipitation methods relatively,. The super-fine Cu-Mn catalyst powder was coated to the Al-Si-O ceramic matrix trough the Al sol binder and the finial block specimen was shaped, which can steadily workd. A serries of measurement composed of XRD、SEM were employed to catalysis the microstructure and the morphology of the catalytic sites. The decomposition of indigo carmine was ultilized to probe the catalytic performance of Cu-Mn catalyst. The results indicated that, with co-precipitation method, the Cu-Mn sample dopped 5% Cu has improved the catalytic performance. Furthermore, XRD confirmed that the material was ascribed to Mn3O4, containing multiple states of Mn, which was facile to cause the ozone degrade. It was told from SEM that the particle distribution is much uniform with the average dimensation of 1um. The procedure to produce the catalyst possessed the property including low cost, low energy consumption, simplness, which are convenient for industrial production.
Keywords: ozone; Cu-Mn catalyst; sol-gel; catalytic properties;
目 录
1. 绪论 1
1.1 臭氧概述 1
1.2 臭氧分解的方法 2
1.2.1 活性碳法 2
1.2.2 热分解法 2
1.2.3 电磁波辐射分解法 2
1.2.4 药液吸收法 2
1.2.5 催化法分解臭氧 2
1.3 国内外催化分解臭氧的各类催化剂 3
1.3.1 含过度金属氧化物的臭氧分解催化剂 3
1.3.2 含贵金属的臭氧分解催化剂 4
1.3.3 含钛的臭氧分解催化剂 4
1.3.4 含锰催化剂[7-12] 4
1.4 含锰催化剂的制备方法 5
1.4.1 共沉淀法 5
1.4.2 浸渍法 5
1.4.3 分步浸渍法 5
1.5臭氧分解催化剂的活性 6
1.5.1 不同催化剂前体 6
1.5.2 煅烧温度 6
1.5.3 反应温度 6
1.5.4 湿度 6
1.5.5 臭氧浓度 7
1.6臭氧分解催化剂催化机理 7
1.6.1 低湿度条件下臭氧的催化分解机理 7
1.6.2 高湿度条件下臭氧的催化分解机理 7
1.7 选题思路 7
1.7.1 选题背景与意义 7
1.7.2 性能分析选择 8
1.7.3 具体流程思路 8
2. 实验部分 9
2.1 实验原料及实验仪器 9
2.2 实验步骤 10
2.2.1 溶胶凝胶法制备催化中心的制备 10
2.2.2 共沉淀制备催化中心 11
2.2.2 Al溶胶的制备 12
2.2.3 多孔陶瓷载体的制备 12
2.3 表征方法 13 高浓度臭氧分解催化剂制备与性能研究:http://www.751com.cn/huaxue/lunwen_4356.html