Surface oxidation of single wall carbon nanohorns for the production of surfactant free water-based colloids

被引：25

作者：

Agresti, Filippo ^{[1
]}

Barison, Simona ^{[1
]}

Famengo, Alessia ^{[1
]}

Pagura, Cesare ^{[1
]}

Fedele, Laura ^{[2
]}

Rossi, Stefano ^{[2
]}

Bobbo, Sergio ^{[2
]}

Rancan, Marzio ^{[3
]}

Fabrizio, Monica ^{[1
]}

机构：

[1] Natl Res Council Italy CNR, Inst Condensed Matter Chem & Technol Energy ICMAT, Corso Stati Uniti 4, Padua, Italy

[2] Natl Res Council Italy CNR, Inst Construct Technol ITC, Corso Stati Uniti 4, Padua, Italy

[3] Univ Padua, Dept Chem Sci, Natl Res Council Italy CNR, Inst Condensed Matter Chem & Technol Energy ICMAT, Via Marzolo 1, I-35131 Padua, Italy

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2018年 / 514卷

关键词：

Single wall carbon nanohorn; Oxidation; Colloid; Stability; Water; SODIUM DODECYL-SULFATE; PHOTODEGRADATION; SUSPENSIONS; DEGRADATION;

D O I：

10.1016/j.jcis.2017.12.058

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this work, powders of Single Wall Carbon Nanohorns (SWCNHs), a typical hydrophobic material, were oxidized with concentrated HNO3 with the aim of surface carboxylation and consequent improved hydrophilicity and dispersibility in polar solvents. Dynamic Light Scattering and zeta-potential measurements demonstrated that very stable colloidal suspensions of SWCNH in water were obtained in total absence of stabilizers. By properly optimizing the reaction parameters, the suspensions achieved stability even higher than colloids with similar composition but prepared with the use of surfactants. Surface damage and oxidation degree of SWCNHs were evaluated by SEM microscopy, Thermogravimetric Analysis, Residual Gas Analysis, XPS and UV-visible spectroscopy. (C) 2017 Elsevier Inc. All rights reserved.

引用

页码：528 / 533

页数：6

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