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0D/2D MXene Quantum Dot/Ni-MOF Ultrathin Nanosheets for Enhanced N2 Photoreduction
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-11-20 , DOI: 10.1021/acssuschemeng.0c06388 Jiangzhou Qin 1 , Baojun Liu 1, 2 , Kwok-Ho Lam 3 , Shijie Song 4 , Xinyong Li 5 , Xia Hu 1, 2
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-11-20 , DOI: 10.1021/acssuschemeng.0c06388 Jiangzhou Qin 1 , Baojun Liu 1, 2 , Kwok-Ho Lam 3 , Shijie Song 4 , Xinyong Li 5 , Xia Hu 1, 2
Affiliation
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To improve the photocatalytic efficiency of the N2 reduction reaction, MXene quantum dots (Ti3C2-QDs) and two-dimensional (2D) nickel metal–organic framework (Ni-MOF) with different ratios were fabricated by a simple self-assembly strategy to form type II heterojunctions. The resultant composites showed enhanced absorption and excellent interfacial charge-transfer capabilities according to the optical and photoelectron properties. The optimal Ti3C2-QD/Ni-MOF heterostructure exhibited a considerable ammonia yield rate (88.79 μmol gcat–1 h–1). By means of X-ray absorption near-edge fine structure (XANES) technique, it was found that the interaction of Ti3C2-QD and Ni-MOF could accelerate the electron transfer, and Ni site would be the main area to enrich the electron density as well as adsorb and activate N2. Finally, with the aid of density functional theory (DFT) calculations and in situ Fourier transform infrared spectrometry (FTIR), the reaction pathway and intermediate products were studied.
中文翻译：
用于增强N 2光还原的0D / 2D MXene量子点/ Ni-MOF超薄纳米片
为了提高N 2还原反应的光催化效率，通过简单的自反应制备了不同比例的MXene量子点（Ti 3 C 2 -QDs）和二维（2D）镍金属-有机骨架（Ni-MOF）。形成II型异质结的装配策略。所得的复合材料根据光学和光电子性质显示出增强的吸收和优异的界面电荷转移能力。最佳的Ti 3 C 2 -QD / Ni-MOF异质结构表现出可观的氨产率（88.79μmolg cat –1 h –1）。通过X射线吸收近边缘精细结构技术（XANES），发现Ti 3 C 2 -QD与Ni-MOF的相互作用可以加速电子转移，Ni位点将成为富集的主要区域。电子密度以及吸附和活化N 2。最后，借助密度泛函理论（DFT）计算和原位傅里叶变换红外光谱（FTIR），研究了反应途径和中间产物。
更新日期：2020-12-07
中文翻译：
用于增强N 2光还原的0D / 2D MXene量子点/ Ni-MOF超薄纳米片
为了提高N 2还原反应的光催化效率，通过简单的自反应制备了不同比例的MXene量子点（Ti 3 C 2 -QDs）和二维（2D）镍金属-有机骨架（Ni-MOF）。形成II型异质结的装配策略。所得的复合材料根据光学和光电子性质显示出增强的吸收和优异的界面电荷转移能力。最佳的Ti 3 C 2 -QD / Ni-MOF异质结构表现出可观的氨产率（88.79μmolg cat –1 h –1）。通过X射线吸收近边缘精细结构技术（XANES），发现Ti 3 C 2 -QD与Ni-MOF的相互作用可以加速电子转移，Ni位点将成为富集的主要区域。电子密度以及吸附和活化N 2。最后，借助密度泛函理论（DFT）计算和原位傅里叶变换红外光谱（FTIR），研究了反应途径和中间产物。
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