石墨烯分散液及其组装膜的性能

doi:10.7503/cjcu20150025

高等学校化学学报 ›› 2015, Vol. 36 ›› Issue (6): 1166.doi: 10.7503/cjcu20150025

石墨烯分散液及其组装膜的性能

杨丽, 李孔斋(), 王华, 魏永刚, 祝星

昆明理工大学冶金与能源工程学院, 冶金节能减排教育部工程研究中心,省部共建复杂有色金属资源清洁利用国家重点实验室, 昆明 650093

收稿日期:2015-01-09 出版日期:2015-06-10 发布日期:2015-05-22
作者简介:联系人简介: 李孔斋, 男, 教授, 主要从事能源催化方面的研究. E-mail:kongzhai.li@foxmail.com
基金资助:
国家自然科学基金(批准号: 51374004, 51174105, 51204083)资助

Studies on Graphene Suspension and Self-assembled Graphene-based Membranes^†

YANG Li, LI Kongzhai^*(), WANG Hua, WEI Yonggang, ZHU Xing

Faculty of Metallurgical and Energy Engineering, Engineering Research Center of Metallurgical Energy Conservation and Emission Reduction of Ministry of Education,State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,Kunming University of Science and Technology, Kunming 650093, China

Received:2015-01-09 Online:2015-06-10 Published:2015-05-22
Contact: LI Kongzhai E-mail:kongzhai.li@foxmail.com
Supported by:
† Supported by the National Natural Science Foundation of China(Nos.51374004, 51174105, 51204083)

摘要/Abstract

摘要：

通过对比表面活性剂十二烷基硫酸钠(SDS)和聚乙烯醇(PVA)对石墨烯的分散能力, 发现SDS可有效避免石墨烯片层之间的团聚, 使得石墨烯在水溶液中分散得更加均匀. 将浓度分别为0.39和0.30 mg/mL的石墨烯(G)和石墨烯片(GF)的SDS分散液旋涂在ITO电极表面制备出G膜和GF膜. 透射电子显微镜和原子力显微镜观测结果表明, 两类石墨烯膜均呈现出纱状透明的片状结构, 同时具有石墨烯特有的褶皱. 在石墨烯膜上继续进行钌配合物分子膜的自组装实验, 得到G/Ru复合膜和GF/Ru复合膜. 采用循环伏安法及紫外-可见吸收光谱法对石墨烯复合膜进行光电化学分析, 结果表明石墨烯膜与钌配合物分子膜的复合可有效加强薄膜对太阳光的吸收.

关键词: 石墨烯分散, 表面活性剂, 石墨烯膜, 复合膜

Abstract:

Two kinds of surfactants, sodium dodecyl sulfate(SDS) and polyvinyl alcohol(PVA), were used to improve the dispersion of graphene in water. It was found that SDS can avoid the reunion between graphene layers, which makes the graphene evenly dispersed in the aqueous solution. Graphene(G) and Graphene flake films(GF) on the surface of ITO electrode were prepared via spin-coating with graphene dispersions. Scanning electron microscopy(SEM) and atomic force microscopy(AFM) results showed that the two types of graphene films represent a yarn shape of transparent flake structure. G/Ru and GF/Ru composite membranes were also prepared by molecular film self-assembly of the graphene films and Ru complex, which were characterized by cyclic voltammetry(CV) and ultraviolet-visible(UV-Vis) spectrometry. The results showed that the prepared composite films own high activity for the absorption of sunlight, indicating excellent photoelectric properties.

Key words: Graphene dispersion, Surfanctant, Graphene film, Composite film

中图分类号:

O646

TrendMD:

杨丽, 李孔斋, 王华, 魏永刚, 祝星. 石墨烯分散液及其组装膜的性能. 高等学校化学学报, 2015, 36(6): 1166.

YANG Li, LI Kongzhai, WANG Hua, WEI Yonggang, ZHU Xing. Studies on Graphene Suspension and Self-assembled Graphene-based Membranes^†. Chem. J. Chinese Universities, 2015, 36(6): 1166.

图/表 10

Fig.1 Structure of [Ru(Py2G1MeBip)(XPOH)](PF6)2 Ru complex(A) and surface-tethered structures for the Ru monolayer on graphene(B)

Fig.2 Effect of concentration of SDS on concen-trations of G(a) and GF(b)

Fig.3 Digital photos of G(A) and GF(B) suspensionsc(G)=0.39 mg/mL; c(GF)=0.30 mg/mL; c(SDS)=2.0 mg/mL.

Fig.4 SEM images of G(A) and GF(B) based membranes

Fig.5 AFM images of G(A) and GF(B) based membranes

Fig.6 Dependence of graphene coverage on rotation speeda. G; b. GF.

Fig.7 Dependence of surface coverage rate on time for graphenes on ITO surfacea. G; b. GF.

Fig.8 Contact angle photos of bare ITO(A), G film(B), GF film(C), G/Ru film(D) and GF/Ru film(E) For G/Ru and GF/Ru films, Ru is on the outermost of the film.

Fig.9 UV-Vis spectra of Ru monomolecular film(a), G/Ru film(b) and GF/Ru film(c)

Fig.10 Typical cyclic voltammograms of Ru, G, GF, G/Ru or GF/Ru film on an ITO substrate at a scan rate of 0.5 V/s(A) and dependence of the peak current on the scan rate(B) (A) a. Ru; b. G; c. GF; d. GF/Ru; e. G/Ru. (B) a, a'. GF/Ru film; b, b'. G/Ru film.

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石墨烯分散液及其组装膜的性能

Studies on Graphene Suspension and Self-assembled Graphene-based Membranes^†

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石墨烯分散液及其组装膜的性能

Studies on Graphene Suspension and Self-assembled Graphene-based Membranes†

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Studies on Graphene Suspension and Self-assembled Graphene-based Membranes^†