氨基功能化介孔Ce-Fe-O合成及其光催化性能研究

Synthesis and Photocatalytic Properties of Amino-Functionalized Mesoporous Ce-Fe-O

以P123(聚环氧乙烷-聚环氧丙烷-聚环氧乙烷三嵌段共聚物)为模板剂,Ce(NO_3)_3,Fe(NO_3)_3为反应原料,通过水热反应,合成了结构性能较好的Ce-Fe-O介孔材料。利用氨基硅烷与表面羟基间的缩合作用,成功地实现了介孔Ce-Fe-O的氨基功能化。利用XRD,N_2吸脱附,Raman,FT-IR等技术对合成样品的结构性能进行了表征。结果表明:以15%Fe(NO_3)_3进行掺杂所获得的Ce-Fe-O结构性能较好;该材料氨基功能化后,除孔径、表面积及孔容变小外,其他性能基本保持不变。以酸性红14(AR14)为探针分子,对相关合成材料的光催化性能进行评价。光催化结果表明:由于氧缺位形成及氨基引入,提高了可见光吸收强度及对AR14的吸附量,所合成的氨基功能化介孔Ce-Fe-O在可见光作用下,可彻底催化降解溶液中的AR14,且降解效率高于相关光催化剂。

Using P123 as template and Ce（NO3）3 and Fe（NO3）3 as raw materials,mesoporous Ce-Fe-O materials with good structural properties were synthesized via hydrothermal reaction. Amino-functionalized mesoporous materials were successfully obtained by the condensation between amino silane and surface hydroxyl group. The synthesized materials were characterized by XRD,N2 adsorption-desorption,Raman,and FT-IR technologies. The results showed that the structural properties of mesoporous CeO2 doped with 15% Fe（NO3）3 were preferable and that the structural properties of Ce-Fe-O remained constant except lower pore size,specific surface area and pore volume after animo-functionation. The photocatalytic performance of synthesized materials was evaluated by the degradation of acid red（AR14） from aqueous solution. The photocatalytic results presented that AR14 can be thoroughly degraded by the amino-functionalized mesoporous Ce-Fe-O under the irradiation of visible light due to the stronger higher adsorption of visible light and the higher adsorption of AR14 resulting from the formation of oxygen vocation and the introduction of amino group,and that the degradation efficiency of amino-functionalized mesoporous Ce-Fe-O was higher than that of the related photocatalysts.