Preparation and Catalytic Ozonation Activity of Pt/CNTs Catalyst

Acta Chimica Sinica ›› 2007, Vol. 65 ›› Issue (24): 2965-2970. Previous Articles Next Articles

Pt/CNTs催化剂的制备及其催化臭氧化活性研究

刘正乾, 马军*

(哈尔滨工业大学市政环境工程学院哈尔滨 150090)

投稿日期:2006-10-16 修回日期:2007-08-06 发布日期:2007-12-28
通讯作者: 马军

Preparation and Catalytic Ozonation Activity of Pt/CNTs Catalyst

LIU Zheng-Qian; MA Jun*

(School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090)

Received:2006-10-16 Revised:2007-08-06 Published:2007-12-28
Contact: MA Jun

Abstract

Pt/carbon nanotube (CNTs) catalyst was prepared by incipient wetness impregnation using H₂PtCl₆•6H₂O as precursor. The catalyst was characterized by SEM, XRD, XPS and its degradation ability for oxalic acid was evaluated. The preparation conditions, including the reduction temperature, Pt loading and pyrolysis were studied. The optimal preparation parameters are obtained to be 350 ℃ with Pt loading of 1.0%. It was found that the removal efficiency of oxalic acid in ozonation alone, CNTs support and Pt/CNTs catalyzed ozonation was 3.0%, 72.9% and 97.9% respectively under the present experimental conditions. The loading of Pt can enhance catalytic activity of CNTs obviously. The XRD results indicate that the active phases of catalysts are in the form of Pt⁰. Compared with that prepared by reduction process in hydrogen, Pt/CNTs catalyst prepared by pyrolysis in air showed lower activity due to the over crystallization of Pt and the existence of chemisorbed oxygen with Pt on CNTs surface.

Key words: carbon nanotube, catalytic ozonation, oxalic acid

Cite this article

LIU Zheng-Qian; MA Jun*. Preparation and Catalytic Ozonation Activity of Pt/CNTs Catalyst[J]. Acta Chimica Sinica, 2007, 65(24): 2965-2970.

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Pt/CNTs催化剂的制备及其催化臭氧化活性研究

Preparation and Catalytic Ozonation Activity of Pt/CNTs Catalyst

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