Electrosorption behavior of copper ions with poly(m-phenylenediamine) paper electrode

Electrosorption of copper ions by poly(m-phenylenediamine)/reduced graphene oxide synthesized via a one-step in situ redox strategy

“…However, there is few reports concerning the electrosorption of heavy metals based on CPs [11], which is probably due to the semiconductor characteristics of CPs, i.e., the electrical conductivity of CPs is not as high as expected.…”

“…The as-prepared PmPD/RGO was applied for the electrosorption of Cu 2+ , during which the concentration of Cu 2+ was measured by monitoring the conductivity of the testing solution [11]. Here, it should be pointed out that in order to improve the electrical conductivity of PmPD, the as-prepared PmPD/RGO was doped in 2 M HCl before the electrosorption.…”

“…The mixture was allowed to be sonicated and stirred for 10 min, and then it was refluxed at 95 °C for 12 h. After cooling down the temperature, the black suspension was poured into 300 mL of 2 M HCl and stirred for 24 h for protonic acid doping of the PmPD. Finally, the products, PmPD/RGO, were collected by filtration, rinsed with water, and dried at 60 °C for 12 h. For control experiments, the PmPD obtained by oxidative polymerization of mPD using (NH 4 ) 2 S 2 O 4 as the oxidant [11] and the RGO obtained from reduction of GO using hydrazine as the reductant [22] (noted as RGO-2), and PmPD/RGO without protonic acid doping treatment (noted as PmPD/RGO-2) were also prepared, respectively.…”

“…Agitation of the testing solution was applied with a magnetic stirrer at a constant speed of 150 rpm. The concentration variation of Cu 2+ was continuously monitored by measuring the conductivity of the testing solution, since the conductivity of a strong electrolyte solution is directly proportional to its concentration at low concentrations [11]. The extent of electrosorption can be calculated using the following equation:…”

Simultaneous electricity generation and tetracycline removal in continuous flow electrosorption driven by microbial fuel cells

“…[20][21][22] Operated with a low voltage (0.5-1.5 V), the charged ions or polar molecules migrate to the charged counter charge electrode, forming an electric double layer on the surface of adsorption electrode, which enhances the adsorption capacity. 23 Thus, it can be easily regenerated by removing the voltage or applying an inverse voltage on the electrodes. [24][25][26] To further improve the energy efficiency of the process, in our previous work, an electrosorption system driven by microbial fuel cells (MFCsorption) was rst designed to remove phenol from wastewater in a batch mode.…”