光催化
面(心理学)
八面体
材料科学
密度泛函理论
载流子
纳米技术
化学工程
结晶学
晶体结构
催化作用
化学
计算化学
光电子学
社会心理学
工程类
生物化学
人格
心理学
五大性格特征
作者
Xiaofan Shi,Xin Lian,Di Yang,Xinming Hu,Jijie Zhang,Xian‐He Bu
出处
期刊:Dalton Transactions
[The Royal Society of Chemistry]
日期:2021-01-01
卷期号:50 (48): 17953-17959
被引量:18
摘要
Sluggish charge transfer is the major problem which restricts the development of metal-organic framework (MOF)-based photocatalysts. Recently, facet-engineering has been proven to be an effective method for solving this issue. However, due to difficulties in regulating the exposed facets of MOFs, there are few reports about the facet-engineering of MOF-based photocatalysts. Here, we firstly report facet-engineering for promoting the photocatalytic activity of NH2-UiO-66 crystals. In this study, by regulating the influence of kinetics and thermodynamics, cubic, tetra-decahedral, and octahedral forms of NH2-UiO-66 are synthesized. The photocatalytic hydrogen evolution rate of tetra-decahedral NH2-UiO-66 with co-exposed (100) and (111) crystal facets reaches 64.06 μmol g-1 h-1, which is approximately 2 and 1.5 times greater than that of the cubic and octahedral forms of NH2-UiO-66, respectively. The density functional theory (DFT) calculation and ultrafast spectroscopy results indicate that a slight staggering exists in the band structure of (100) and (111) facets, causing the facets junction to appear. The facet junction promotes the charge separation efficiency and prolongs the lifetime of the charge carriers, thereby giving tetra-decahedral NH2-UiO-66 optimal photocatalytic performance. This study demonstrates the feasibility and potential of facet-engineering for photocatalytic applications of MOFs.
科研通智能强力驱动
Strongly Powered by AbleSci AI