直接 Z 型 WO3/共价有机骨架 (COF) 异质结构用于增强水中光催化过氧化氢的生产,Catalysis Science & Technology

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直接 Z 型 WO3/共价有机骨架 (COF) 异质结构用于增强水中光催化过氧化氢的生产
Catalysis Science & Technology ( IF 4.4 ) Pub Date : 2023-08-24 , DOI: 10.1039/d3cy00878a
Yepeng Yang ₁ , Yuan Li ₁ , Xiaoqian Ma ₁ , Lanxin Xie ₁ , Die Lv ₁ , Liang Jiang ₁ , Jiao He ₁ , Daomei Chen ₁ , Jiaqiang Wang ₁

Affiliation

由水和O ₂光催化生产过氧化氢（H ₂ O ₂ ）受到了相当多的关注。然而，大多数报道的光催化剂往往需要添加牺牲剂来猝灭h ⁺，这极大地限制了其实际应用并增加了成本。在本研究中，我们提出了一种Z型异质结WO ₃ /共价有机框架（Tp-TAPB），它可以加速界面的分离和电荷转移，并保留WO ₃和Tp-TAPB的强氧化和还原能力。_{光催化H 2} O ₂生产WO ₃活性在没有任何牺牲剂的纯水体系中，/Tp–TAPB达到1488.4 μmol g ^-1 h ^{-1 ，分别是WO}₃和Tp–TAPB的72.3倍和2.8倍。此外，WO ₃ /Tp–TAPB用于湖水和自来水光催化H ₂ O ₂生产，仍然保持较高的光催化H ₂ O _2产率。将原位光催化合成的H ₂ O ₂用于实际焦化废水中，在紫外光照射下去除化学需氧量(COD) 。_{UV/H 2}去除 COD 超过 37%氧₂。据我们所知，目前还没有其他关于利用光催化原位合成的H 2 O 2 降解真实水中有机_污染物的_研究。该研究为不使用牺牲剂的光催化生产H ₂ O ₂提供了新的思路和方法。

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Direct Z-scheme WO3/covalent organic framework (COF) heterostructure for enhanced photocatalytic hydrogen peroxide production in water

Photocatalytic hydrogen peroxide (H₂O₂) production from water and O₂ has received considerable attention. However, most of the photocatalysts reported often require the addition of sacrificial agents to quench h⁺, which greatly restricts their practical application and increases the cost. In this study, we proposed a Z-scheme heterojunction WO₃/covalent organic framework (Tp–TAPB) that can accelerate the separation and charge transfer at the interface and retain the strong oxidative and reductive ability of WO₃ and Tp–TAPB. The photocatalytic activity for H₂O₂ production of WO₃/Tp–TAPB reached 1488.4 μmol g⁻¹ h⁻¹ in a pure water system without any sacrificial agents, which is 72.3 times and 2.8 times higher than that of WO₃ and Tp–TAPB, respectively. In addition, WO₃/Tp–TAPB was used for photocatalytic H₂O₂ production in lake water and tap water, and a high photocatalytic H₂O₂ production rate was still maintained. The in situ photocatalytically synthesized H₂O₂ was used in the real coking wastewater to remove chemical oxygen demand (COD) under UV light radiation. The removal of COD was over 37% with UV/H₂O₂. To the best of our knowledge, there is no other study on the degradation of organic pollutants in real water by using photocatalytically synthesized H₂O₂ in situ. This study provides a new idea and approach for photocatalytic H₂O₂ production without using a sacrificial agent.

更新日期：2023-08-24

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