Adsorption behavior of pH-dependent phytic acid micelles at the copper surface observed by Raman and electrochemistry

被引：12

作者：

Shen, Shu ^{[1
]}

Du, Juan ^{[1
]}

Guo, Xiao-yu ^{[1
]}

Wen, Ying ^{[1
]}

Yang, Hai-Feng ^{[1
]}

机构：

[1] Shanghai Normal Univ, Shanghai Key Lab Rare Earth Funct Mat, Dept Chem, Shanghai 200234, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2015年 / 327卷

基金：

中国国家自然科学基金;

关键词：

Copper; Phytic acid; Micelles; Raman; Electrochemistry; CORROSION-INHIBITORS; DRUG-DELIVERY; SULFURIC-ACID; HYDROCHLORIC-ACID; REVERSE MICELLES; SPECTROSCOPY; MONOLAYERS; MICROREACTORS; NANOPARTICLES; MEDIA;

D O I：

10.1016/j.apsusc.2014.11.155

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：

As heated at 90 degrees C, phytic acid (PA) molecules in the solution self-organized to form the PA micelles. The size of PA micelles could be tuned by varying pH of the solutions. The adsorption behavior of the different micelles at the copper surface and their corrosion inhibition mechanisms in 0.5 M H-2 SO4 solution were studied by using electrochemical impedance spectroscopy (EIS), potentiodynamic polarization and surface-enhanced Raman scattering (SERS) spectroscopy. Raman studies showed that the bigger micelles anchoring on the copper surface via P-27-O-28, P-43-O-42 and P-35-O-36 groups, while the smaller PA micelles formed at pH 9 adsorbed at the surface through P-35-O-36 group. The electrochemical measurements demonstrated that the copper modified with the smaller micelles presented the best inhibition efficiency in 0.5 M H-2 SO4 solution. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：116 / 121

页数：6

共 34 条

[1] Nano-engineering block copolymer aggregates for drug delivery [J].