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General Microwave Route to Single-Crystal Porous Transition Metal Nitrides for Highly Sensitive and Stable Raman Scattering Substrates
Nano Letters ( IF 9.6 ) Pub Date : 2021-09-03 , DOI: 10.1021/acs.nanolett.1c02541
Damin Liu 1, 2 , Xiaoyu Song 1 , Wencai Yi 3 , Yahui Li 1 , Qinghong Kong 2 , Hua Bai 1 , Mingqiang Zou 1 , Guangcheng Xi 1
Affiliation  

The synthesis of metallic transition metal nitrides (TMNs) has traditionally been performed under harsh conditions, which makes it difficult to prepare TMNs with high surface area and porosity due to the grain sintering. Herein, we report a general and rapid (30 s) microwave synthesis method for preparing TMNs with high specific surface area (122.6–141.7 m2 g–1) and porosity (0.29–0.34 cm3 g–1). Novel single-crystal porous WN, Mo2N, and V2N are first prepared by this method, which exhibits strong surface plasmon resonance, photothermal conversion, and surface-enhanced Raman scattering effects. Different from the conventional low-temperature microwave absorbing media such as water and polymers, as new concept absorbing media, hydrated metal oxides and metallic metal oxides are found to have a remarkable high-temperature microwave heating effect and play key roles in the formation of TMNs. The current research results provide a new-concept microwave method for preparing high lattice energy compounds with high specific surface.

中文翻译:

用于高灵敏度和稳定拉曼散射基板的单晶多孔过渡金属氮化物的一般微波途径

金属过渡金属氮化物(TMNs)的合成传统上是在苛刻的条件下进行的,这使得由于晶粒烧结而难以制备具有高表面积和孔隙率的 TMNs。在此,我们报告了一种通用且快速(30 s)的微波合成方法,用于制备具有高比表面积(122.6–141.7 m 2 g –1)和孔隙率(0.29–0.34 cm 3 g –1)的TMN 。新型单晶多孔 WN、Mo 2 N 和 V 2N首先通过这种方法制备,它表现出强烈的表面等离子体共振、光热转换和表面增强拉曼散射效应。不同于水和聚合物等传统的低温微波吸收介质,作为新概念的吸收介质,水合金属氧化物和金属金属氧化物具有显着的高温微波加热效应,在TMNs的形成中起关键作用。 . 目前的研究成果为制备高比表面积的高晶格能化合物提供了一种新概念的微波方法。
更新日期:2021-09-22
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