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首页> 外文期刊>Catalysis science & technology >Carbon nitride nanosheet/metal-organic framework nanocomposites with synergistic photocatalytic activities
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Carbon nitride nanosheet/metal-organic framework nanocomposites with synergistic photocatalytic activities

机译：氮化碳nanosheet /有机框架与协同光催化纳米复合材料活动

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摘要

Heterogeneous photocatalysis plays a key role in the implementation of novel sustainable technologies, e.g. CO2 conversion into fuel, H-2 production from water or organics degradation. The progress of photocatalysis relies on the development of tuneable photocatalysts and particularly the ability to build nanocomposites exhibiting synergistic properties with reduced electron-hole recombination rates. We report for the first time the in situ synthesis of nanocomposites of carbon nitride nanosheets (CNNSs) and metal-organic frameworks (MOFs) for application as photocatalysts. This approach leads to the 'nano-scale mixing' of the components, thereby enabling a greater performance compared to other types of 2D materials/MOF composites typically obtained via physical mixing. The objective is to take advantage of the complementary features of the materials while forming a heterojunction. The structural, chemical, photophysical and electrochemical properties of the nanocomposites are characterized and compared to those of the parent materials and their physical mixture. The nanocomposites retain the high specific surface area and strong visible light absorbance of MIL-100(Fe). The intimate contact between the CNNSs and the MOF particles is found to promote the electron-hole separation significantly due to the formation of a heterojunction. Hence, more efficient photocatalytic dye degradation is achieved over the composites than the physical mixture.
机译：多相光催化中起着关键的作用小说可持续的实现技术,例如二氧化碳转换成燃料,2生产从水或有机物降解。光催化的进步依赖于发展可协调的催化剂特别的能力构建纳米复合材料表现出协同性能降低电子空穴复合率。第一次的原位合成氮化碳nanosheets的纳米复合材料(CNNSs)和有机框架(mof)应用程序作为催化剂。导致的“纳米混合”组件,从而使更大性能比其他类型的2 d材料/财政部复合材料通常获得通过物理混合。优势互补的特点材料而形成异质结。化学、光物理和结构纳米复合材料的电化学性能特点和比较的吗父材料及其物理混合物。纳米复合材料保留了较高的比表面积区和强烈的可见光吸收mil - 100 (Fe)。CNNSs和财政部粒子促进电子空穴分离显著原因一个异质结的形成。高效光催化染料降解在复合材料的物理实现混合物。

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