Sodium doping and 3D honeycomb nanoarchitecture: Key features of covalent triazine-based frameworks (CTF) organocatalyst for enhanced solar-driven advanced oxidation processes

IF 21.1 1区化学 Q1 CHEMISTRY, PHYSICAL Applied Catalysis B: Environmental Pub Date : 2019-11-15 DOI:10.1016/j.apcatb.2019.117915

Tao Zeng , Shuqi Li , Yi Shen , Haiyan Zhang , Hongru Feng , Xiaole Zhang , Lingxiangyu Li , Zongwei Cai , Shuang Song

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引用次数: 34

Abstract

Herein, we designed a novel sodium-doped covalent triazine-based framework with a 3D honeycomb nanoarchitecture (H-CTF-Na) as visible-light-responsive organocatalyst to efficiently drive advanced oxidation processes (AOPs). Experimental and theoretical findings reveal that Na doping narrows the band gap by elevating the band edges and the 3D hierarchical nanocellular morphology improves light harvesting and electron transfer. With these merits, H-CTF-Na showed a photoactivity enhancement of 4.9–6.0-fold for the degradation of carbamazepine (CBZ) compared to those of pristine CTFs and g-C₃N₄ through peroxymonosulfate (PMS) activation under visible-light irradiation. The quenching and EPR results indicate that a synergistic effect between photooxidation (h⁺) and PMS activation (^•OH and SO₄^•−) derived from the vigorous capture of photogenerated e⁻ by PMS is responsible for the marked efficacy of H-CTF-Na/vis/PMS system. Moreover, this system exhibited excellent versatility in degrading other organics (such as various phenols and dyes) and good reusability in terms of five high-efficiency recycled uses.

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钠掺杂和三维蜂窝纳米结构:共价三嗪基框架(CTF)有机催化剂的关键特征，用于增强太阳能驱动的高级氧化过程

在此，我们设计了一种新型的钠掺杂共价三嗪基框架，其3D蜂窝纳米结构(H-CTF-Na)作为可见光响应的有机催化剂，有效地驱动高级氧化过程(AOPs)。实验和理论结果表明，Na掺杂通过提升带边来缩小带隙，并且三维分层纳米细胞形态改善了光捕获和电子转移。基于这些优点，H-CTF-Na在可见光照射下通过过氧单硫酸盐(PMS)活化降解卡马西平(CBZ)的光活性比原始ctf和g-C3N4增强4.9 - 6.0倍。猝灭和EPR结果表明，PMS强烈捕获光生成的e -所产生的光氧化(h+)和PMS活化(•OH和SO4•−)之间的协同效应是h - ctf - na /vis/PMS体系显着功效的原因。此外，该体系在降解其他有机物(如各种酚类和染料)方面表现出优异的通用性，并且在五种高效循环利用方面具有良好的可重复使用性。

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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.