Microstructure and Photocatalytic Decomposition of Methylene Blue by TiO2-Mounted Halloysite, a Natural Tubular Mineral  

作　　者：LU Xianchu CHUAN Xiuyun WANG Aiping KANG Feiyu 

机构地区：[1]School of Earth and Space Sciences, Peking University, Beijing 100871 [2]Institute of Process and Engineering, Chinese Academy of Sciences, Beijing 100080 [3]Department of Material Science and Engineering, Tsinghua University, Beijing 100084

出　　处：《Acta Geologica Sinica(English Edition)》2006年第2期278-284,共7页地质学报（英文版）

基　　金：a project sponsored by the Scientific Research Foundation for Returned 0verseas Chinese Scholars;the State Education Ministry;and in part by the National Natural Science Foundation of China(No.50272005);the Analysis Foundation of Peking University

摘　　要：On the basis of analysis of structure and properties, halloysite, a natural tubular mineral, was developed for an environmental treatment. TiO2 was mounted into halloysite by using hydrolysis of tetrabutyl titanate at room temperature. The adsorption and photocatalytic performance of halloysite and TiO2-mounted halloysite have been examined in methylene blue aqueous solution in the dark and under ultraviolet ray irradiation, respectively. Their performance of adsorption and photodecomposition was evaluated from the adsorbed and degraded amounts of methylene blue （MB）. Due to the mixture of adsorption and photodecomposition, the concentration of MB, organic pollution, in water decreased rapidly with TiO2-mounted halloysite powder, which is a faster reaction than that with halloysite-only adsorption. This new use of halloysite is leading to many interesting applications in the decomposition and elimination of various pollutants in air and water.On the basis of analysis of structure and properties, halloysite, a natural tubular mineral, was developed for an environmental treatment. TiO2 was mounted into halloysite by using hydrolysis of tetrabutyl titanate at room temperature. The adsorption and photocatalytic performance of halloysite and TiO2-mounted halloysite have been examined in methylene blue aqueous solution in the dark and under ultraviolet ray irradiation, respectively. Their performance of adsorption and photodecomposition was evaluated from the adsorbed and degraded amounts of methylene blue （MB）. Due to the mixture of adsorption and photodecomposition, the concentration of MB, organic pollution, in water decreased rapidly with TiO2-mounted halloysite powder, which is a faster reaction than that with halloysite-only adsorption. This new use of halloysite is leading to many interesting applications in the decomposition and elimination of various pollutants in air and water.

关 键 词：HALLOYSITE TiO2-mounted halloysite methylene blue PHOTODECOMPOSITION ANTI-POLLUTION 

分 类 号：P619.232[天文地球—矿床学]