Article history: The novel functionalization of multi-walled carbon nanotubes (MWCNTs) was synthesized by reac- Received 30 November 2015 ting trimethoxysilylpropanethiol (MPTs), hydrazine, ammonium ferrous sulfate, and ammonium ferric Received in revised form 5 February 2016 sulfate in sequence as efﬁcient ways to introduce Fe O , amino and thiol groups onto the nanotubes 3 4 Accepted 5 February 2016 sidewalls. The magnetic MWCNTs composite material (N H –SH–Fe O /o-MWCNTs) was characterized 2 4 3 4 Available online 9 February 2016 by transmission electron microscopy, ﬁeld emission scanning electron microscopy, X-ray diffraction, thermo-gravimetric analysis, x-ray photoelectron spectroscopy, Fourier transformation infrared spec- Keywords: troscopy and magnetization curve. The results revealed that MPTs and hydrazine were coated on the Multi-walled nanotube surface of N H –SH–Fe O /o-MWCNTs. A series of batch adsorption experiments were conducted to 2 4 3 4 Adsorption study the experimental conditions, such as pH, contact time, initial concentrations and temperatures, Thermodynamics which affected the adsorption process. The adsorption experiment results showed that the maxi- Dynamics mum equilibrium adsorption capacity of N H –SH–Fe O /o-MWCNTs for lead, zinc and phenol was 2 4 3 4 195.81 mg/g, 169.89 mg/g and 38.97 mg/g at pH 6, respectively.
Applied Surface Science – Elsevier
Published: Apr 30, 2016
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