Preparation and characterization of a novel Ce doped PbO2 electrode based on NiO modified Ti/TiO2NTs substrate for the electrocatalytic degradation of phenol wastewater

Wang, Zhicheng; Xu, Maotian; Wang, Fengwu; Liang, Xian; Wei, Yijun; Hu, Yunhu; Zhu, Chuan Gao; Fang, Wenyan

doi:10.1016/j.electacta.2017.07.057

Cited by 88 publications

(24 citation statements)

References 39 publications

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“…4,71 The removal of contaminants present in wastewater streams generated by various industrial processes has emerged as a signicant concern during past decade. 72,73 This is because of the decline in the amount and quality of available fresh water in the world due to the increase in water demands and long periods of drought. Many extremely toxic and hazardous compounds such as phenol and its derivatives are considered as persistent organic contaminants that occupy a prominent position on the WHO contaminants list owing to their high toxicity for microorganisms, high chemical oxygen demand and low biodegradability.…”

Section: Overviewmentioning

confidence: 99%

Synthesis and application of pillared clay heterogeneous catalysts for wastewater treatment: a review

2018

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Section: Overviewmentioning

confidence: 99%

Synthesis and application of pillared clay heterogeneous catalysts for wastewater treatment: a review

2018

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“…In these electrolyses, 0.5 L of an aqueous 100 mg L À1 NOR solution in 0.1 mol L À1 Na 2 SO 4 was used. The effect of the following variables (and respective ranges) was investigated: pH (3, 7, 10, and no pH control), current density (10,20, and 30 mA cm À2 ), and temperature (10,25, and 40 C). The solution pH was continuously monitored and, if necessary, kept constant at the desired value by addition of a concentrated H 2 SO 4 or NaOH solution.…”

Section: Electrochemical Degradation Experiments and Analysesmentioning

confidence: 99%

“…In this sense, b-PbO 2 is one of the most investigated anode materials concerning both inorganic [10,19e22] and organic [23,24] doping, modification of the Ti substrate to avoid migration of the ion O 2À (e.g. using Pt [25,26] or oxide [20,24,27] coatings, some of them nanostructured [10,28]), usage of 3D substrates [29e31] or graphene interlayers [32], and changes in the b-phase morphology [33] to increase the film stability and the mineralization efficiency in the organics degradation. The use of transition metals as inorganic dopants of b-PbO 2 has led to an increase in its electrocatalytic power for organics oxidation [10,20,21], whereas the use of fluoride ion-based electrolytes [34] and fluorine-based polymers (polyvinylidene difluoride e PVDF [23,24] or polytetrafluoroethylene e PTFE [35]) in the electrodeposition bath have led to b-PbO 2 films with longer-lasting stability (as inferred from service life determinations).…”

Section: Introductionmentioning

confidence: 99%

Evolution of the antibacterial activity and oxidation intermediates during the electrochemical degradation of norfloxacin in a flow cell with a PTFE-doped β-PbO2 anode: Critical comparison to a BDD anode

Sánchez-Montes

Neto

Silva³

et al. 2018

Electrochimica Acta

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The electrochemical degradation of the antibiotic norfloxacin (NOR) was investigated using an electrodeposited polytetrafluoroethylene (PTFE)-doped b-PbO 2 anode; its attained performance was compared to that of a boron-doped diamond (BDD) anode to check out a literature claim of superior performance by the former anode. The PTFE content in the electrodeposition bath was optimized to lead to a significantly extended service life of the b-PbO 2 anode despite its titanium substrate. The NOR degradation electrolyses (100 mg L À1 NOR in 0.1 mol L À1 Na 2 SO 4) were carried out in a filter-press flow cell (flow rate of 420 L h À1) using the following optimized conditions: no pH control, current density of 10 mA cm À2 , and 40 C. The electrooxidation process performance under these conditions was assessed through the evolution of the attained removals of NOR, total organic carbon (TOC), and antibacterial activity against Escherichia coli; the evolution of oxidation intermediates (aromatic compounds and carboxylic acids) was also assessed. In spite of the complete oxidation of NOR, the TOC removal attained with the PTFE-doped b-PbO 2 anode was relatively low (70% after 12 h, compared to 90% after only 5 h for a Si/BDD anode). As a consequence of this inferior performance comparatively to that of a BDD anode, a higher number of aromatic intermediates was detected; these intermediates seemed to still present antibacterial activity against Escherichia coli, which lasted even after all NOR was oxidized, contrary to the case of the electrooxidation with a BDD anode. The performance of the PTFE-doped b-PbO 2 anode was not superior to that of a BDD anode, i.e. the doping of the b-PbO 2 film with PTFE, making it hydrophobic, does not change the oxidation power of the anode despite increasing its service life.

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“…Jin et al [20] found that doping Ce can form smaller crystal size on the surface of the electrode, resulting in the increase of specific surface area and catalytically active sites. Xia et al [21] reported that proper doping of Ni can make the grains dense, which not only facilitates electron movement, and improves electrochemical performance, but also helps to extend electrode life.…”

Section: Introductionmentioning

confidence: 99%

“…We can improve the electrochemical activity and stability of the electrode by doping Ce and Ni in the active layer PbO 2 electrode [22]. The doping of Ce and Ni reduces the crystal size of the active layer [11,21], but increases the surface area of the active layer and the electrochemical activity of the electrode, in addition, the service life of the electrode is extended to some extent. Finally, the electrochemical activity and stability of porous Ni-Ce-PbO 2 electrodes were investigated and compared with the conventional porous undoped PbO 2 electrode and the doped flat Ni-Ce-PbO 2 electrode.…”

Section: Introductionmentioning

confidence: 99%

A Novel Porous Ni, Ce-Doped PbO2 Electrode for Efficient Treatment of Chloride Ion in Wastewater

et al. 2020

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The porous Ti/Sb-SnO2/Ni-Ce-PbO2 electrode was prepared by using a porous Ti plate as a substrate, an Sb-doped SnO2 as an intermediate, and a PbO2 doped with Ni and Ce as an active layer. The surface morphology and crystal structure of the electrode were characterized by scanning electron microscope(SEM), energy dispersive spectrometer(EDS), and X-Ray diffraction(XRD). The electrochemical performance of the electrodes was tested by linear sweep voltammetry (LSV), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and electrode life test. The results show that the novel porous Ni-Ce-PbO2 electrodes with larger active surface area have better electrochemical activity and longer electrode life than porous undoped PbO2 electrodes and flat Ni-Ce-PbO2 electrodes. In this work, the removal of Cl− in simulated wastewater on three electrodes was also studied. The results show that the removal effect of the porous Ni-Ce-PbO2 electrode is obviously better than the other two electrodes, and the removal rate is 87.4%, while the removal rates of the other two electrodes were 72.90% and 80.20%, respectively. In addition, the mechanism of electrochemical dechlorinating was also studied. With the progress of electrolysis, we find that the increase of OH- inhibits the degradation of Cl−, however, the porous Ni-Ce-PbO2 electrode can effectively improve the removal of Cl−.

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Preparation and characterization of a novel Ce doped PbO2 electrode based on NiO modified Ti/TiO2NTs substrate for the electrocatalytic degradation of phenol wastewater

Cited by 88 publications

References 39 publications

Synthesis and application of pillared clay heterogeneous catalysts for wastewater treatment: a review

Synthesis and application of pillared clay heterogeneous catalysts for wastewater treatment: a review

Evolution of the antibacterial activity and oxidation intermediates during the electrochemical degradation of norfloxacin in a flow cell with a PTFE-doped β-PbO2 anode: Critical comparison to a BDD anode

A Novel Porous Ni, Ce-Doped PbO2 Electrode for Efficient Treatment of Chloride Ion in Wastewater

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