Cobalt-intercalated one-dimensional nanocrystals of urea perylene imide polymer for enhanced visible-light photocatalytic water oxidation

IF 19.7 1区化学 Q1 CHEMISTRY, PHYSICAL

Applied Catalysis B: Environmental Pub Date : 2022-07-15 Epub Date: 2022-03-05 DOI:10.1016/j.apcatb.2022.121293

Aihui Cao , Renfu Li , Xiao Xu , Weifeng Huang , Ying He , Junqiang Li , Miao Sun , Xueyuan Chen , Longtian Kang

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引用次数: 8

Abstract

Urea perylene imide polymer (UPDI) is successfully recombined with Co(NO₃)₂ molecules into one-dimensional nanocrystals (Co−UPDI) for enhanced photocatalytic oxygen evolution (POE) under visible light. Co−UPDI as photocatalyst exhibits more an order of magnitude of POE rate than UPDI at pH = 4.8 (8.00 vs. 0.58 mmol h⁻¹g⁻¹), which is the highest among reported POE tests in aqueous colloid system with AgNO₃ as sacrificial agent. The apparent quantum yield (AQY) reaches 4.39 % at 450 nm. The systematical experiments reveals that the heterojunction formation between UPDI line and Co(NO₃)₂ molecules is crucial through the coordination of Co with N atoms. Consequently, the rigidity of UPDI line enhances, H−type stacking of PDI moiety becomes closer, and CoOOH as cocatalyst in-situ forms during POE. Meanwhile, more excitons with longer lifetime generate and more quickly transfer in Co−UPDI than UPDI nanocrystals. This work provides an efficient strategy for photocatalytic water oxidation.

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用于增强可见光光催化水氧化的尿素-苝酰亚胺聚合物的钴插层一维纳米晶体

尿素-苝酰亚胺聚合物(UPDI)在可见光下与Co(NO3)2分子成功地重组成一维纳米晶体(Co - UPDI)，用于增强光催化析氧(POE)。在pH = 4.8 (8.00 vs 0.58 mmol h−1g−1)时，Co−UPDI的POE速率比UPDI高一个数量级，在以AgNO3为牺牲剂的水性胶体体系中，其POE速率最高。在450 nm处，表观量子产率(AQY)达到4.39%。系统实验表明，通过Co与N原子的配位，UPDI线与Co(NO3)2分子之间形成异质结是至关重要的。因此，在POE过程中，UPDI线的刚性增强，PDI部分的H−型堆叠更加紧密，CoOOH作为助催化剂原位形成。与UPDI纳米晶体相比，Co - UPDI纳米晶体产生的激子更多，激子寿命更长，激子转移速度更快。这项工作为光催化水氧化提供了一种有效的策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Catalysis B: Environmental 环境科学-工程：化工

CiteScore

38.60

自引率

6.30%

发文量

1117

审稿时长

24 days

期刊介绍： Applied Catalysis B: Environment and Energy (formerly Applied Catalysis B: Environmental) is a journal that focuses on the transition towards cleaner and more sustainable energy sources. The journal's publications cover a wide range of topics, including: 1.Catalytic elimination of environmental pollutants such as nitrogen oxides, carbon monoxide, sulfur compounds, chlorinated and other organic compounds, and soot emitted from stationary or mobile sources. 2.Basic understanding of catalysts used in environmental pollution abatement, particularly in industrial processes. 3.All aspects of preparation, characterization, activation, deactivation, and regeneration of novel and commercially applicable environmental catalysts. 4.New catalytic routes and processes for the production of clean energy, such as hydrogen generation via catalytic fuel processing, and new catalysts and electrocatalysts for fuel cells. 5.Catalytic reactions that convert wastes into useful products. 6.Clean manufacturing techniques that replace toxic chemicals with environmentally friendly catalysts. 7.Scientific aspects of photocatalytic processes and a basic understanding of photocatalysts as applied to environmental problems. 8.New catalytic combustion technologies and catalysts. 9.New catalytic non-enzymatic transformations of biomass components. The journal is abstracted and indexed in API Abstracts, Research Alert, Chemical Abstracts, Web of Science, Theoretical Chemical Engineering Abstracts, Engineering, Technology & Applied Sciences, and others.