The activated carbon fiber (ACF) felt with H3PO4 pretreatment was used as raw materials

adopting dipping calcination method to prepare Al2O3/ACF composite electrode materials. The micro-structure and electrochemical performance of the activated carbon fiber before and after loaded with Al2O3 were characterized by using scanning electron microscopy (SEM)

Brunauer-Emmett-Teller gas adsorption method (BET)

X-ray diffraction (XRD)

energy X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR)

respectively

and then using homemade improvised electric adsorption desalination device to test the electric adsorption performance for NaCl model wastewater. The results showed that Al2O3/ACF composite electrode materials were prepared with success by adopting the dipping calcination method. There was flocculent or granulate Al2O3 in the surface and pores of Al2O3/ACF complex

and the specific surface area was decreased from 1244.37 m2·g-1 to 974.59 m2·g-1. Meanwhile

the content of Al was 1.06% and Al2O3 with amorphous was existed on the surface of activated carbon fiber. The Al-O bonds were found on the surface of Al2O3/ACF electrode materials with increasing specific capacitance of 76.5% in comparison with the original activated carbon electrode. After loaded Al2O3

the electric double layer capacity of ACF electrode materials was increased

the electric adsorption performance was improved

the desalination efficiency was promoted more than 2.3 times as original and the electrode was reproducible. Al2O3/ACF composite materials can be used as the electrode materials for the removal of the inorganic ions in wastewater.