Carbon dots bridged Zn0.5Cd0.5S with interfacial amide bond facilitating electron transfer for efficient photocatalytic hydrogen peroxide production

IF 20.2 1区化学 Q1 CHEMISTRY, PHYSICAL

Applied Catalysis B: Environmental Pub Date : 2024-01-10 DOI:10.1016/j.apcatb.2024.123721

Ting Tang , Jiwu Zhao , Yongli Shen , Fan Yang , Shuang Yao , Changhua An

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Abstract

Photocatalytic H₂O₂ production has gained significant attention as an environmentally friendly approach. The key is to explore efficient photocatalysts with sufficient active sites and excellent electron transfer capacity. Herein, we propose a novel approach by incorporating carbon dots (CDs) on ethylenediamine capped Zn_0.5Cd_0.5S, which was bridged with an interfacial amide bond. Smooth transfer of photoinduced electrons from Zn_0.5Cd_0.5S to carbon dots via a high-speed electron channel is afforded by interfacial amide bond. A remarkable H₂O₂ yield with a rate of 252 μmol/h and an apparent quantum yield (AQY) of 31 % at 400 nm is achieved. Photoelectrochemical analysis and density function theory (DFT) calculation reveal CDs with abundant oxygenous functional groups as active sites, boosting activity and selectivity. This interfacial engineering strategy with the acceleration of electrons transfer and enhanced 2e^- selectivity can be applied to advanced photocatalytic systems for the achievement of valuable organics, environmental purification and new energy carriers.

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碳点桥接 Zn0.5Cd0.5S，其界面酰胺键可促进电子转移，从而高效光催化生产过氧化氢

光催化 H2O2 生产作为一种环境友好型方法受到了广泛关注。关键在于探索具有足够活性位点和出色电子传递能力的高效光催化剂。在此，我们提出了一种新方法，即在乙二胺封端的 Zn0.5Cd0.5S 上加入碳点（CD），并以界面酰胺键作为桥接。界面酰胺键使光诱导电子通过高速电子通道从 Zn0.5Cd0.5S 顺利转移到碳点。在 400 纳米波长下，H2O2 产率高达 252 μmol/h，表观量子产率 (AQY) 为 31%。光电化学分析和密度函数理论（DFT）计算显示，CD 具有丰富的含氧官能团作为活性位点，从而提高了活性和选择性。这种加速电子转移和提高 2e- 选择性的界面工程策略可应用于先进的光催化系统，以实现有价值的有机物、环境净化和新能源载体。

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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.