Surface characterization of porous carbon
Zeta potential of the studied PC, WBTPA(1:3)400 1 h was
measured using Beckman Coulter Zeta potential analyzer (DelsaTM
Nano C) based on the Laser Doppler electrophoresis technique. At
pH 7, the zeta potential for the studied PC was found to be
20.60 mV. The pH at which the zeta potential is zero is measured
as point of zero charge (pHPZC), and hence, the net charge on the
adsorbent surface is zero. The pHPZC of the PC, WBTPA(1:3)400 1 h
was found to be 3.4. Above the pHPZC, the adsorbent surface
becomes negative and favored for adsorption of cations. The
concentration of surface functional groups of PC was determined
by Boehm titration method [42]. The amount of total basic and
acidic sites as per calculation was found to be 0.529 mol/g and
0.6 mol/g, respectively.
Surface characterization of porous carbonZeta potential of the studied PC, WBTPA(1:3)400 1 h wasmeasured using Beckman Coulter Zeta potential analyzer (DelsaTMNano C) based on the Laser Doppler electrophoresis technique. AtpH 7, the zeta potential for the studied PC was found to be20.60 mV. The pH at which the zeta potential is zero is measuredas point of zero charge (pHPZC), and hence, the net charge on theadsorbent surface is zero. The pHPZC of the PC, WBTPA(1:3)400 1 hwas found to be 3.4. Above the pHPZC, the adsorbent surfacebecomes negative and favored for adsorption of cations. Theconcentration of surface functional groups of PC was determinedby Boehm titration method [42]. The amount of total basic andacidic sites as per calculation was found to be 0.529 mol/g and0.6 mol/g, respectively.
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