期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 60, 期 33, 页码 18303-18308出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202106310
关键词
Bi4Ti3O12; CO2 reduction; corona poling; ferroelectric photocatalysts; ion grafting
资金
- National Natural Science Foundation of China [51972288, 51672258]
- Fundamental Research Funds for the Central Universities [2652018287]
The study combined corona poling and surface I-grafting to enhance charge separation and CO2 affinity of Bi4Ti3O12, resulting in a significant increase in CO production rate. The synergistic effect of ferroelectric polarization and surface ion grafting promotes CO2 photoreduction efficiently.
Sluggish charge kinetics and low CO2 affinity seriously inhibit CO2 photoreduction. Herein, the synchronous promotion of charge separation and CO2 affinity of Bi4Ti3O12 is realized by coupling corona poling and surface I-grafting. Corona poling enhances ferroelectric polarization of Bi4Ti3O12 by aligning the domains direction, which profoundly promotes charge transfer along opposite directions across bulk. Surface I-grafting forms a surface local electric field for further separating charge carriers and provides abundant active sites to enhance CO2 adsorption. The two modifications cooperatively further increase the ferroelectric polarization of Bi4Ti3O12, which maximize the separation efficiency of photogenerated charges, resulting in an enhanced CO production rate of 15.1 mu mol g(-1) h(-1) (nearly 9 times) with no sacrificial agents or cocatalysts. This work discloses that ferroelectric polarization and surface ion grafting can promote CO2 photoreduction in a synergistic way.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据