• 文献标题:   Effect of oxidation debris on spectroscopic and macroscopic properties of graphene oxide
  • 文献类型:   Article
  • 作  者:   GUO ZJ, WANG SF, WANG G, NIU ZL, YANG JW, WU WS
  • 作者关键词:  
  • 出版物名称:   CARBON
  • ISSN:   0008-6223 EI 1873-3891
  • 通讯作者地址:   Lanzhou Univ
  • 被引频次:   26
  • DOI:   10.1016/j.carbon.2014.04.068
  • 出版年:   2014

▎ 摘  要

Oxidation debris (OD) and graphene oxide (GO) before and after OD removal were characterized by Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, mass spectroscopy, X-ray diffraction, transmission electron microscopy and potentiometric titration, respectively. OD removal decreased GO absorption intensity in UV/Vis spectra, caused changes in peak position and absorption intensity in FTIR spectra, and resulted in the decrease of I-D/I-G in Raman spectra. OD was amorphous and had higher content of acidic groups than purified GO. OD contributed 10-25% of overall surface charge density to unpurified GO in spite of small amount (ca. 1% mass). OD removal decreased significantly GO dispersibility in aqueous solution, but increased obviously the electrical conductivity of reduced graphene oxide (rGO) and the apparent density of compacted rGO. The removal of OD was necessary because of its striking effects on both GO spectroscopic and macroscopic properties. Batch desorption in NaOH solution was recommended for OD removal from as-prepared graphite oxide because of slow OD desorption kinetics. (C) 2014 Elsevier Ltd. All rights reserved.