| Birnessite和Cryptomelane型氧化锰的可控合成及其催化性能 |
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| 引用本文： | 刁贵强,余林,孙明,余倩,范方强,那秀辉. Birnessite和Cryptomelane型氧化锰的可控合成及其催化性能[J]. 催化学报, 2009, 30(11) |
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| 作者姓名： | 刁贵强 余林 孙明 余倩 范方强 那秀辉 |
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| 作者单位： | 广东工业大学轻工化工学院,广东广州,510006;广东工业大学轻工化工学院,广东广州,510006;广东工业大学轻工化工学院,广东广州,510006;广东工业大学轻工化工学院,广东广州,510006;广东工业大学轻工化工学院,广东广州,510006;广东工业大学轻工化工学院,广东广州,510006 |
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| 基金项目： | 国家自然科学基金，广东省高等学校自然科学研究重点项目，广东省自然科学基金 |
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| 摘 要： | 以葡萄糖和高锰酸钾为原料,采用溶胶-凝胶法合成了birnessite(K_(1.35)MnO_2,简写为Bir)和cryptomelane(K_(0.27)MnO_2,简写为Cry)型氧化锰;采用X射线衍射、原子吸收光谱等考察了凝胶处理方法、反应物浓度比、焙烧温度和反应时间等对氧化锰晶型的影响.结果表明,采用不同方法处理凝胶可实现对Bir和Cry型氧化锰的可控合成.以不同的处理方法,葡萄糖和高锰酸钾的浓度比为O.74,反应20s制成凝胶,并在400℃焙烧2h,可分别制取高结晶度和高纯度的Bir和Cry型氧化锰.Bir和Cry型氧化锰在二甲醚燃烧反应中表现出优异的催化性能,且Cry型氧化锰的催化活性更高.
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| 关 键 词： | 溶胶-凝胶法 氧化锰 可控合成 二甲醚 催化燃烧 |
Controllable Synthesis of Birnessite and Cryptomelane Types of Manganese Oxide and Their Catalytic Performance |
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| DIAO Guiqiang,YU Lin,SUN Ming,YU Qian,FAN Fangqiang,NA Xiuhui. Controllable Synthesis of Birnessite and Cryptomelane Types of Manganese Oxide and Their Catalytic Performance[J]. Chinese Journal of Catalysis, 2009, 30(11) |
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| Authors: | DIAO Guiqiang YU Lin SUN Ming YU Qian FAN Fangqiang NA Xiuhui |
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| Affiliation: | DIAO Guiqiang,YU Lin,SUN Ming,YU Qian,FAN Fangqiang,NA Xiuhui Faculty of Chemical Engineering , Light Industry,Guangdong University of Technology,Guangzhou 510006,Guangdong,China |
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| Abstract: | The birnessite and cryptomelane types of manganese oxide were prepared by the sol-gel method using KMnO4 and glucose. The optimum conditions were investigated by varying different process variables such as c(glucose)/c(KMnO4) ratio, calcination temperature, reaction time, and gel treatment methods. The results of X-ray diffraction and atomic absorption spectroscopy indicated that the crystal phases of manganese oxide were controllable with different gel treatment methods. Under the conditions of c(glucose)/... |
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| Keywords: | sol-gel method manganese oxide controllable synthesis dimethyl ether catalytic combustion |
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