当前位置: X-MOL 学术ACS Catal. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Subsurface Defect Engineering in Single-Unit-Cell Bi2WO6 Monolayers Boosts Solar-Driven Photocatalytic Performance
ACS Catalysis ( IF 11.3 ) Pub Date : 2020-01-07 , DOI: 10.1021/acscatal.9b04789
Haowei Huang 1 , Chen Zhou 2 , Xingchen Jiao 3 , Haifeng Yuan 4 , Jiwu Zhao 5 , Chunqing He 6 , Johan Hofkens 4 , Maarten B. J. Roeffaers 1 , Jinlin Long 5 , Julian A. Steele 1
Affiliation  

Defect engineering in photocatalysts represents a fundamental method toward tailoring their solar-to-chemical energy conversion performance, although determining the nature and impact of subsurface defects remains challenging. Single-unit-cell Bi2WO6 monolayers, forming a sandwich-like structure, [BiO]+–[WO4]2––[BiO]+, exhibit promising photocatalytic performance and are an ideal system for isolating subsurface defects. We report the single-step synthesis of Bi2WO6 monolayers rich in stable interior W vacancies and characterize their influence on the physical properties necessary for effective photocatalytic surface reactions. Defect-rich monolayers benefit from enhanced visible-light absorption and photocarrier transport, boosting the solar photocatalytic oxidation of benzylic alcohols by 140% at no cost to selectivity or stability. This work highlights the importance of subsurface defects within surface-driven photocatalytic applications and prescribes a general strategy for their isolated study via 2D compounds exhibiting symmetric surface termination.

中文翻译:

单单元Bi 2 WO 6单层中的地下缺陷工程可提高太阳能驱动的光催化性能

尽管确定表面缺陷的性质和影响仍然具有挑战性,但光催化剂中的缺陷工程是调整其太阳能转化为化学能的性能的基本方法。单单元Bi 2 WO 6单层,形成三明治状结构[BiO] + – [WO 4 ] 2 – – [BiO] +,具有良好的光催化性能,是隔离表面缺陷的理想系统。我们报告了Bi 2 WO 6的一步合成具有稳定的内部W空位的单分子层,其特征在于它们对有效的光催化表面反应所必需的物理性能的影响。富含缺陷的单层得益于增强的可见光吸收和光载流子传输,可将苄醇的太阳光催化氧化提高140%,而无需牺牲选择性或稳定性。这项工作突出了表面缺陷在表面驱动的光催化应用中的重要性,并规定了通过表现出对称表面终止作用的2D化合物对其进行孤立研究的一般策略。
更新日期:2020-01-07
down
wechat
bug