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首页> 外文期刊>RSC Advances >Mesoporous Cu–Cu2O@TiO2 heterojunction photocatalysts derived from metal–organic frameworks
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Mesoporous Cu–Cu2O@TiO2 heterojunction photocatalysts derived from metal–organic frameworks

机译：中孔Cu-Cu2O @ TiO2衍生自金属有机框架的异质结光催化剂

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摘要

This study reveals a unique Cu–Cu _(2) O@TiO _(2) heterojunction photocatalyst obtained with metal–organic framework as the precursor, which can be utilized in dye photodegradation under visible light irradiation. The composition, structure, morphology, porosity, optical properties and photocatalytic performance of the obtained catalysts were all investigated in detail. The Cu–Cu _(2) O@TiO _(2) nanocomposite is composed of lamellar Cu–Cu _(2) O microspheres embedded by numerous TiO _(2) nanoparticles. Methylene blue, methyl orange and 4-nitrophenol were used as model pollutants to evaluate the photocatalytic activity of the Cu–Cu _(2) O@TiO _(2) nanocomposite for dye degradation under visible light irradiation. Nearly 95% decolourisation efficiency of Methylene blue was achieved by the Cu–Cu _(2) O@TiO _(2) photocatalyst within 3 h, which is much higher than that of TiO _(2) or Cu _(2) O catalysts. The excellent photocatalytic activity was primarily attributed to the unique MOF-based mesoporous structure, the enlarged photo-adsorption range and the efficient separation of the charge carriers in the Cu–Cu _(2) O@TiO _(2) heterojunction.
机译：该研究揭示了用金属 - 有机框架作为前体获得的独特Cu-Cu _（2）o @ TiO _（2）异质结光催化剂，其可用于可见光照射下的染料光降解。得到所得催化剂的组成，结构，形态，孔隙率，光学性质和光催化性能全部详细研究。 Cu-Cu _（2）o @ TiO _（2）纳米复合材料由嵌入多个TiO _（2）纳米颗粒的层状Cu-Cu _（2）o微球组成。使用亚甲基蓝，甲基橙和4-硝基苯酚作为模型污染物，以评价Cu-Cu _（2）o @ TiO _（2）纳米复合材料在可见光照射下染料降解的光催化活性。通过3小时内的Cu-Cu _（2）o @ TiO _（2）光催化剂实现近95％的亚甲基蓝色脱色效率，其远高于TiO _（2）或Cu _（2）O.催化剂。优异的光催化活性主要归因于独特的MOF基介孔结构，增大光吸收范围和Cu-Cu _（2）O o @ TiO _（2）异质结中的电荷载体的有效分离。

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