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通过超临界过程（USP）和冻干法合成镍/氧化钇纳米复合材料以用作涂层的可能性研究。

Synthesis of Ni/YO Nanocomposite through USP and Lyophilisation for Possible Use as Coating.

作者信息

Švarc Tilen, Stopić Srećko, Jelen Žiga, Zadravec Matej, Friedrich Bernd, Rudolf Rebeka

机构信息

Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia.

Process Metallurgy and Metal Recycling, RWTH Aachen University, Intzestrasse 3, 52056 Aachen, Germany.

出版信息

Materials (Basel). 2022 Apr 13;15(8):2856. doi: 10.3390/ma15082856.

DOI:10.3390/ma15082856
PMID:35454550
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9028117/
Abstract

The Ni/Y2O3 catalyst showed high catalytic activity. Based on this, the aim of this study was to create Ni/Y2O3 nanocomposites powder with two innovative technologies, Ultrasonic Spray Pyrolysis (USP) and lyophilisation. In the USP process, thermal decomposition of the generated aerosols in an N2/H2 reduction atmosphere caused a complete decomposition of the nickel (II) nitrate to elemental Ni, which became trapped on the formed Y2O3 nanoparticles. The Ni/Y2O3 nanocomposite particles were captured via gas washing in an aqueous solution of polyvinylpyrrolidone (PVP) in collection bottles. PVP was chosen for its ability to stabilise nano-suspensions and as an effective cryoprotectant. Consequently, there was no loss or agglomeration of Ni/Y2O3 nanocomposite material during the lyophilisation process. The Ni/Y2O3 nanocomposite powder was analysed using ICP-MS, SEM-EDX, and XPS, which showed the impact of different precursor concentrations on the final Ni/Y2O3 nanocomposite particle composition. In a final step, highly concentrated Ni/Y2O3 nanocomposite ink (Ni/Y2O3 > 0.140 g/mL) and test coatings from this ink were prepared by applying them on a white matte photo paper sheet. The reflection curve of the prepared Ni/Y2O3 nanocomposite coating showed a local maximum at 440 nm with a value of 39% reflection. Given that Ni is located on the surface of the Ni/Y2O3 nanocomposite in the elemental state and according to the identified properties, tests of the catalytic properties of this coating will be performed in the future.

摘要

Ni/Y2O3催化剂表现出高催化活性。基于此，本研究的目的是采用超声喷雾热解（USP）和冻干两种创新技术制备Ni/Y2O3纳米复合材料粉末。在USP过程中，生成的气溶胶在N2/H2还原气氛中热分解，使硝酸镍（II）完全分解为元素Ni，其被困在形成的Y2O3纳米颗粒上。通过在收集瓶中的聚乙烯吡咯烷酮（PVP）水溶液中进行气体洗涤来捕获Ni/Y2O3纳米复合颗粒。选择PVP是因为它能够稳定纳米悬浮液并且作为一种有效的冷冻保护剂。因此，在冻干过程中Ni/Y2O3纳米复合材料没有损失或团聚。使用电感耦合等离子体质谱（ICP-MS）、扫描电子显微镜-能谱仪（SEM-EDX）和X射线光电子能谱（XPS）对Ni/Y2O3纳米复合粉末进行了分析，结果表明不同前驱体浓度对最终Ni/Y2O3纳米复合颗粒组成有影响。在最后一步中，通过将高浓度的Ni/Y2O3纳米复合墨水（Ni/Y2O3>0.140 g/mL）涂覆在白色哑光相纸上制备了测试涂层。制备的Ni/Y2O3纳米复合涂层的反射曲线在440 nm处有一个局部最大值，反射率为39%。鉴于Ni以元素状态位于Ni/Y2O3纳米复合材料的表面，并且根据所确定的性质，未来将对该涂层的催化性能进行测试。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5f2d/9028117/0c6ee8a88555/materials-15-02856-g014.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5f2d/9028117/0c6ee8a88555/materials-15-02856-g014.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5f2d/9028117/b5f60dc52665/materials-15-02856-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5f2d/9028117/1fc2eda0defd/materials-15-02856-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5f2d/9028117/9019d1cf2517/materials-15-02856-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5f2d/9028117/a6386d08ce81/materials-15-02856-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5f2d/9028117/848e34855060/materials-15-02856-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5f2d/9028117/91f25ed92564/materials-15-02856-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5f2d/9028117/ad57784139f6/materials-15-02856-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5f2d/9028117/0c6ee8a88555/materials-15-02856-g014.jpg

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