e-journal

The surface analytical characterization of carbon fibers functionalized by H2SO4/HNO3 treatment

---

Abstract.
A systematic, time-dependent, surface-sensitive study has, for the first time, given new
insights into the mechanism of the often-used, but unexplained, sulfuric/nitric acid oxidation
of graphene-containing materials, such as carbon fibers and carbon nanotubes. We
used X-ray photoelectron, photoacoustic FTIR and Raman spectroscopies to follow the evolution
of the functionalization of carbon fibers sonicated in a 3:1 (v/v) mixture of concentrated
acids at 60 C. The study has revealed that oxidation occurs subsequent to acid
attack, the attack serving to prepare sites for the ensuing oxidation, as witnessed by the
presence of four O1s, two N1s and two S2p XPS peaks during the site preparation process.
Their intensities varied discontinuously with treatment time, particularly in the early
stages, rather than constantly increasing with time. Two of the O1s, and all the S2p and
N1s peaks diminished in intensity with treatment time, eventually disappearing. The only
nontransitory oxidized carbon functionality was COOH, confirmed by the two remaining
O1s XPS peaks, which continued to increase long after the disappearance of the transitory
species. This slow carboxylic acid production indicates that COOH formation is the ratecontrolling
step of the process, occurring subsequent to the site preparation initiated by
the transitory species.

---

Ketersediaan

Tidak ada salinan data

Informasi Detail

Judul Seri

CA R B O N

No. Panggil

-

Penerbit

London : Elsevier Ltd.., 2008

Deskripsi Fisik

CA R B O N 4 6 ( 2 0 0 8 ) 1 9 6 –2 0 5

Bahasa

English

ISBN/ISSN

-

Klasifikasi

-

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

-

Subjek

KIMIA

Info Detail Spesifik

-

Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

Komentar

---

Anda harus masuk sebelum memberikan komentar