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首页> 美国卫生研究院文献>Nanoscale Research Letters >In Situ Synthesis of All-Solid-State Z-Scheme BiOBr0.3I0.7/Ag/AgI Photocatalysts with Enhanced Photocatalytic Activity Under Visible Light Irradiation
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In Situ Synthesis of All-Solid-State Z-Scheme BiOBr0.3I0.7/Ag/AgI Photocatalysts with Enhanced Photocatalytic Activity Under Visible Light Irradiation

机译：在可见光照射下原位合成具有增强光催化活性的全固态Z方案BiOBr0.3I0.7 / Ag / AgI光催化剂

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摘要

A series of novel visible light driven all-solid-state Z-scheme BiOBr0.3I0.7/Ag/AgI photocatalysts were synthesized by facile in situ precipitation and photo-reduction methods. Under visible light irradiation, the BiOBr0.3I0.7/Ag/AgI samples exhibited enhanced photocatalytic activity compared to BiOBr0.3I0.7 and AgI in the degradation of methyl orange (MO). The optimal ratio of added elemental Ag was 15%, which degraded 89% of MO within 20 min. The enhanced photocatalytic activity of BiOBr0.3I0.7/Ag/AgI can be ascribed to the efficient separation of photo-generated electron–hole pairs through a Z-scheme charge-carrier migration pathway, in which Ag nanoparticles act as electron mediators. The mechanism study indicated that ·O2− and h+ are active radicals for photocatalytic degradation and that a small amount of ·OH also participates in the photocatalytic degradation process.
机译：通过简便的原位沉淀和光还原法合成了一系列新型的可见光驱动的全固态Z-方案BiOBr0.3I0.7 / Ag / AgI光催化剂。在可见光照射下，与BiOBr0.3I0.7和AgI相比，BiOBr0.3I0.7 / Ag / AgI样品在甲基橙（MO）降解中表现出增强的光催化活性。元素银的最佳添加比例为15％，可在20分钟内降解89％的MO。 BiOBr0.3I0.7 / Ag / AgI增强的光催化活性可以归因于通过Z型电荷载流子迁移路径有效分离光生电子空穴对，其中Ag纳米粒子充当电子介体。机理研究表明·O2 -和h + 是光催化降解的活性自由基，少量·OH也参与了光催化降解过程。

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