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结合咖啡酸与水热处理制备环境友好型高度还原氧化石墨烯

Joining Caffeic Acid and Hydrothermal Treatment to Produce Environmentally Benign Highly Reduced Graphene Oxide.

作者信息

Barra Ana, Lazăr Oana, Pantazi Aida, Hortigüela María J, Otero-Irurueta Gonzalo, Enăchescu Marius, Ruiz-Hitzky Eduardo, Nunes Cláudia, Ferreira Paula

机构信息

Department of Materials and Ceramic Engineering, CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal.

Department of Chemistry, CICECO-Aveiro Institute of Materials, University of Aveiro, 3810-193 Aveiro, Portugal.

出版信息

Nanomaterials (Basel). 2021 Mar 15;11(3):732. doi: 10.3390/nano11030732.

DOI:10.3390/nano11030732
PMID:33803933
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8001889/
Abstract

Reduced graphene oxide (rGO) is a promising graphene-based material, with transversal applicability to a wide range of technological fields. Nevertheless, the common use of efficient-but hazardous to environment and toxic-reducing agents prevents its application in biological and other fields. Consequently, the development of green reducing strategies is a requirement to overcome this issue. Herein, a green, simple, and cost-effective one-step reduction methodology is presented. Graphene oxide (GO) was hydrothermally reduced in the presence of caffeic acid (CA), a natural occurring phenolic compound. The improvement of the hydrothermal reduction through the presence of CA is confirmed by XRD, Raman, XPS and TGA analysis. Moreover, CA polymerizes under hydrothermal conditions with the formation of spherical and non-spherical carbon particles, which can be useful for further rGO functionalization. FTIR and XPS confirm the oxygen removal in the reduced samples. The high-resolution scanning transmission electron microscopy (HRSTEM) images also support the reduction, showing rGO samples with an ordered graphitic layered structure. The promising rGO synthesized by this eco-friendly methodology can be explored for many applications.

摘要

还原氧化石墨烯（rGO）是一种很有前景的基于石墨烯的材料，在广泛的技术领域具有横向适用性。然而，常用的高效但对环境有害且有毒的还原剂阻碍了其在生物和其他领域的应用。因此，开发绿色还原策略是克服这一问题的必要条件。在此，提出了一种绿色、简单且具有成本效益的一步还原方法。氧化石墨烯（GO）在天然存在的酚类化合物咖啡酸（CA）的存在下进行水热还原。通过XRD、拉曼、XPS和TGA分析证实了CA的存在对水热还原的促进作用。此外，CA在水热条件下聚合形成球形和非球形碳颗粒，这可用于进一步的rGO功能化。FTIR和XPS证实了还原样品中的氧去除。高分辨率扫描透射电子显微镜（HRSTEM）图像也支持了这种还原，显示出具有有序石墨层状结构的rGO样品。通过这种环保方法合成的有前景的rGO可用于许多应用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/53a7/8001889/ad6fe39bafb3/nanomaterials-11-00732-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/53a7/8001889/86e81414d09d/nanomaterials-11-00732-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/53a7/8001889/ba1fe179f65b/nanomaterials-11-00732-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/53a7/8001889/4451eb58bc83/nanomaterials-11-00732-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/53a7/8001889/06e2cfdc1c1e/nanomaterials-11-00732-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/53a7/8001889/a5c645ea1b2d/nanomaterials-11-00732-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/53a7/8001889/d16964e8fcee/nanomaterials-11-00732-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/53a7/8001889/45f3852522ff/nanomaterials-11-00732-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/53a7/8001889/ad6fe39bafb3/nanomaterials-11-00732-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/53a7/8001889/86e81414d09d/nanomaterials-11-00732-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/53a7/8001889/ba1fe179f65b/nanomaterials-11-00732-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/53a7/8001889/4451eb58bc83/nanomaterials-11-00732-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/53a7/8001889/06e2cfdc1c1e/nanomaterials-11-00732-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/53a7/8001889/a5c645ea1b2d/nanomaterials-11-00732-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/53a7/8001889/d16964e8fcee/nanomaterials-11-00732-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/53a7/8001889/45f3852522ff/nanomaterials-11-00732-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/53a7/8001889/ad6fe39bafb3/nanomaterials-11-00732-g008.jpg

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