期刊
POLYMERS
卷 13, 期 2, 页码 -出版社
MDPI
DOI: 10.3390/polym13020243
关键词
cellulose nanocrystals; fullerene; fulleropyrrolidine; Langmuir-Schä fer deposition; voltammetry; photocurrent; photocatalysis
资金
- MIUR [2017PBXPN4]
- Programma Operativo Nazionale FSE-FESR Ricerca e Innovazione 2014-2020-Asse prioritario I Investimenti in Capitale Umano-Azione I.1-Dottorati Innovativi con caratterizzazione industriale, XXXII ciclo
- Spanish State Research Agency [MDM-2017-0720]
Cellulose nanomaterials show attractive properties for emerging applications, with sulfated cellulose nanocrystals being able to guide the supramolecular organization of amphiphilic fullerene derivatives at the air/water interface. The electrostatic interaction between cationic fullleropyrrolidines and anionic CNCs leads to the assembly of robust hybrid films, despite the inhibition by additional negatively charged species. These hybrid films, when transferred onto solid substrates, enhance electrical capacitance and produce higher anodic photocurrents compared to films with only fullerene derivatives.
Cellulose nanomaterials have been widely investigated in the last decade, unveiling attractive properties for emerging applications. The ability of sulfated cellulose nanocrystals (CNCs) to guide the supramolecular organization of amphiphilic fullerene derivatives at the air/water interface has been recently highlighted. Here, we further investigated the assembly of Langmuir hybrid films that are based on the electrostatic interaction between cationic fulleropyrrolidines deposited at the air/water interface and anionic CNCs dispersed in the subphase, assessing the influence of additional negatively charged species that are dissolved in the water phase. By means of isotherm acquisition and spectroscopic measurements, we demonstrated that a tetra-sulfonated porphyrin, which was introduced in the subphase as anionic competitor, strongly inhibited the binding of CNCs to the floating fullerene layer. Nevertheless, despite the strong inhibition by anionic molecules, the mutual interaction between fulleropyrrolidines at the interface and the CNCs led to the assembly of robust hybrid films, which could be efficiently transferred onto solid substrates. Interestingly, ITO-electrodes that were modified with five-layer hybrid films exhibited enhanced electrical capacitance and produced anodic photocurrents at 0.4 V vs Ag/AgCl, whose intensity (230 nA/cm(2)) proved to be four times higher than the one that was observed with the sole fullerene derivative (60 nA/cm(2)).
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据