Flower-like Bi0/CeO2–δ plasmonic photocatalysts with enhanced visible-light-induced photocatalytic activity for NO removal
Flower-like Bi0/CeO2–δ plasmonic photocatalysts with enhanced visible-light-induced photocatalytic activity for NO removal
复制标题
花状 Bi0/CeO2-等离激元光催化剂，具有增强的可见光诱导光催化活性，可去除 NO
DOI：
10.1007/s40843-020-1467-7
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发表时间：
2020
影响因子：
8.1
通讯作者：
Zhu Gangqiang
中科院分区：
文献类型：
--
作者：
Nie Junli;Gao Jianzhi;Shen Qian;Zhang Weibin;Rao Fei;Hojamberdiev Mirabbos;Zhu Gangqiang
通过溶剂热法合成了具有丰富氧空位（OV）的等离子铋（Bi~0）纳米颗粒装饰的花状CeO_（2-δ）（Bi~0/CeO_（2-δ））光催化剂。 OV不仅可以改善电子空穴对的分离，而且有利于气体分子（NO/O2）的吸附和活化。此外，Bi~0纳米粒子还可以利用表面等离子共振（SPR）效应增强可见光响应并阻止载流子复合，在可见光照射下实现优异的NO消除和NO_2抑制能力。密度泛函理论（DFT）计算证实，Bi~0和CeO_(2-δ)之间的肖特基势垒以及OVs对于光生电荷载流子迁移参与光催化NO去除至关重要。通过捕获实验和原位 FTIR 光谱来探索光催化 NO 去除的机理，表明通过引入丰富的 OV 和 Bi~0 金属纳米颗粒的参与可以显着增强光催化 NO 的去除效果。
Plasmonic bismuth (Bi~0) nanoparticle-decorated flower-like CeO_(2–δ) (Bi~0/CeO_(2–δ)) photocatalysts with abundant oxygen vacancies (OVs) were synthesized via a solvothermal method. The OVs can not only improve the separation of electron-hole pairs, but also facilitate the adsorption and activation of gas molecules (NO/O2). In addition, the Bi~0 nanoparticles can enhance the visible light response and prevent the recombination of charge carriers by virtue of the surface plasmon resonance (SPR) effect, achieving an excellent ability for NO elimination and NO_2 inhibition under visible light irradiation. Density functional theory (DFT) calculations confirm that the Schottky barrier between Bi~0 and CeO_(2–δ) accompanied with the OVs are pivotal for the migration of photogenerated charge carriers to involve in the photocatalytic NO removal. Trapping experiments and in situ FTIR spectroscopy were conducted to explore the mechanism of the photocatalytic NO removal, suggesting that the photocatalytic NO removal can be significantly enhanced by introducing abundant OVs and the involvement of Bi~0 metal nanoparticles.