期刊
ACS CATALYSIS
卷 11, 期 21, 页码 13463-13471出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.1c03687
关键词
photocatalytic water oxidation; polymeric carbon nitride; gradient VDW homojunction; separation of excitons; Lewis acid-base
资金
- National Natural Science Foundation of China [22032002, 22172029, U1905214, 21861130353, 21961142019, 21761132002, 21425309]
- National Basic Research Program of China [2013CB632405]
- Chang Jiang Scholars Program of China [T2016147]
- 111 Project [D16008]
Ionothermal synthesis in a ternary salt melt can promote polycondensation and improve crystallinity, resulting in the formation of Zn-PHI/PHI hybrid polymer with built-in electric field for efficient charge carrier separation and transfer in photocatalytic water oxidation.
Ionothermal synthesis of amorphous melon in a ternary salt melt (ZnCl2-LiCl-KCl) with lower melting points could promote the polycondensation process and improve the degree of crystallinity. As Zn2+ ions tend to incorporate with edge nitrogen of carbon nitride via Lewis acid-base interactions, a series of crystalline hybrid poly heptazine imides (PHI), namely, Zn-PHI/PHI, integrated by van der Waals interactions, were generated as main products. Interestingly, the contents of doped Zn2+ ions of the as-synthesized Zn-PHI/PHI gradually decrease from the bulk interior to surfaces, due to the evaporation of ZnCl2 during thermal heating processes. Accordingly, a built-in electric field would be created in the catalyst, which largely accelerates a separation of the photogenerated charge carriers at the interfaces. Owing to the fast charge carrier separation and transfer, this hybrid polymer is active for photocatalytic water oxidation with an apparent quantum yield of up to 3.6% at 420 nm. This work offers a strategy for the rational design and synthesis of polymeric photocatalysts for water oxidation reaction.
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