The advantages of visible light-driven catalysts with good light absorption, fast charge separation rate and high redox capacity are compelling. However, conventional inorganic semiconductor, such as pure BiOBr (BOB), showed a rapid photogenerated carriers recombination rate and low solar energy utilization ability, which limited the practical application of its photocatalytic performance. In this work, a novel organic/inorganic interleaved (Z-scheme) heterojunction Yb-MOF/BiOBr (Yb-MOF/BOB) photocatalyst was successfully synthesized. Compared with a single component, the Yb-MOF/BOB heterojunction exhibited significantly enhanced performance in photocatalytic oxidation of NO under visible light. Among them, Yb-MOF/BOB-20 had the best photocatalytic NO removal effect, up to 6424 ppb/g, which was 2.8 times and 4.2 times that of BOB and Yb-MOF, respectively. Photoelectrochemical characterization confirmed that the formation of heterojunctions broadened the absorption sidebands and increased the charge transfer at the interfacial junction of Yb-MOF/BOB. Combined with UPS, ESR and DRIFTS analysis, possible photocatalytic mechanisms were revealed, in which the formation of the Yb-MOF/BOB heterostructure endowed its high charge mobility and strong redox ability. Therefore, this work provided an effective way for photocatalytic removal of NO, and offered new ideas for developing heterogeneous photocatalysts.

中文翻译：

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用于高效光催化去除 NO 的有机/无机 Z 型异质结 Yb-MOF/BiOBr

可见光驱动催化剂具有良好的光吸收、快速的电荷分离速率和高氧化还原能力的优点引人注目。然而，传统的无机半导体，如纯BiOBr（BOB），表现出快速的光生载流子复合速率和较低的太阳能利用率，限制了其光催化性能的实际应用。在这项工作中，成功合成了一种新型有机/无机交错（Z型）异质结Yb-MOF/BiOBr（Yb-MOF/BOB）光催化剂。与单一组分相比，Yb-MOF/BOB异质结在可见光下光催化氧化NO的性能显着增强。其中，Yb-MOF/BOB-20的光催化NO去除效果最好，高达6424 ppb/g，分别是BOB和Yb-MOF的2.8倍和4.2倍。光电化学表征证实异质结的形成拓宽了吸收边带并增加了 Yb-MOF/BOB 界面连接处的电荷转移。结合UPS、ESR和DRIFTS分析，揭示了可能的光催化机制，其中Yb-MOF/BOB异质结构的形成赋予其高电荷迁移率和强氧化还原能力。因此，该工作为光催化去除NO提供了一种有效途径，并为开发多相光催化剂提供了新思路。