温度和铜浓度对由硫酸盐木质素形成石墨烯包裹铜纳米颗粒的影响

Temperature and Copper Concentration Effects on the Formation of Graphene-Encapsulated Copper Nanoparticles from Kraft Lignin.

作者信息

Leng Weiqi, Barnes H Michael, Cai Zhiyong, Zhang Jilei

机构信息

Department of Sustainable Bioproducts, Mississippi State University, Mississippi, MS 39762, USA.

U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, Madison, WI 53726, USA.

出版信息

Materials (Basel). 2017 Jun 21;10(6):677. doi: 10.3390/ma10060677.

DOI:10.3390/ma10060677

PMID:28773040

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5554058/

Abstract

The effects of temperature and copper catalyst concentration on the formation of graphene-encapsulated copper nanoparticles (GECNs) were investigated by means of X-ray diffraction, Fourier transform infrared spectroscopy-attenuated total reflectance, and transmission electron microscopy. Results showed that higher amounts of copper atoms facilitated the growth of more graphene islands and formed smaller size GECNs. A copper catalyst facilitated the decomposition of lignin at the lowest temperature studied (600 °C). Increasing the temperature up to 1000 °C retarded the degradation process, while assisting the reconfiguration of the defective sites of the graphene layers, thus producing higher-quality GECNs.

摘要

通过X射线衍射、傅里叶变换红外光谱-衰减全反射和透射电子显微镜研究了温度和铜催化剂浓度对石墨烯包裹铜纳米颗粒（GECNs）形成的影响。结果表明，较多的铜原子数量有助于更多石墨烯岛的生长，并形成尺寸更小的GECNs。在研究的最低温度（600℃）下，铜催化剂促进了木质素的分解。将温度升高至1000℃会延缓降解过程，同时有助于石墨烯层缺陷位点的重新构型，从而产生质量更高的GECNs。