Enhanced surface activity of activated carbon by surfactants synergism

Ntakirutimana, Samuel; Tan, Wei; Wang, Yang

doi:10.1039/c9ra04521j

Cited by 38 publications

(14 citation statements)

References 57 publications

(78 reference statements)

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“…Moreover, since anions have greater polarizability, they bind more tightly on the oxide surface than hydrated cations. When the surface of the electrode is positive, it is more attractive . Therefore, when TiO 2 is used as the electrode material, it has the best capacitive performance as a cathode material when the PZC is the largest.…”

Section: Resultsmentioning

confidence: 99%

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Influence of Surface Potential on the Capacitive Performance of the TiO₂ Thin-Film Electrode with Different Crystalline Forms

2020

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Electrochemical capacitor and capacitive deionization store energy through the interface layer formed between electrodes and electrolytes. The crystalline form and surface potential of the oxide electrode can be changed in order to improve the capacitance. By characterizing the surface property and crystalline form of the TiO2 thin-film electrode at different sintering temperatures, it is showed that each electrode has its own surface potential which is affected by the crystalline structure. At elevated sintering temperature, TiO2 transfers from anatase to rutile with an increased surface potential. The electrochemical tests show that the electrode capacitance increases from 19.50 to 41.82 mF/cm2. Therefore, rutile TiO2 has a higher surface potential and better capacitive performance when used on a positive electrode compared with anatase TiO2. In general, the relation between the surface potential, the crystalline forms, and the capacitive performance is achieved in this work. We hope it can promote the investigation of oxide materials in the application for electrochemical capacitors and capacitive deionization.

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Section: Resultsmentioning

confidence: 99%

“…When the surface of the electrode is positive, it is more attractive. 32 Therefore, when TiO 2 is used as the electrode material, it has the best capacitive performance as a cathode material when the PZC is the largest.…”

Section: ■ Introductionmentioning

confidence: 99%

Influence of Surface Potential on the Capacitive Performance of the TiO₂ Thin-Film Electrode with Different Crystalline Forms

2020

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“…It was well known that Nonionic surfactants rely on steric hindrance to realize the dispersion of particles [40,41]. Due to the existence of charge repulsion, the steric hindrance entropy effect of ionic surfactants was greatly reduced.…”

Section: Effect Of Surfactant On Dispersion Stability Of Colloidmentioning

confidence: 99%

Methods and Mechanistic Analysis of Improving the Dispersion of Nano Silica Colloidal Particles in Chemical Mechanical Polishing Slurries

Zeng

Zhao

Liu

et al. 2021

Preprint

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The colloidal silica is usually used as the abrasive for the copper CMP polishing slurry in integrated circuit multilayer copper wiring. The aggregation of colloidal silica in the slurries tend to aggregate spontaneously, resulting in the continuous changes of the polishing effect, such as scratch defects, removal rate, etc. This situation can lead to the potential instability of the polishing slurry, which should be avoided in industrial production. In this paper, the aggregation and dispersion properties of polishing slurries were systematically studied, and an improved scheme was proposed to improve the dispersion of slurries to prevent agglomeration. These affecting factors including slurries’ pH, electrolyte additive (KNO3) and polyelectrolyte (PAA-Na) were assessed with LPC, Zeta potential and particle size. A better pH range for slurries was determined from the point of view of isoelectric point and dissolution of colloidal silica. And the dissolution of colloidal silica was verified by UV-vis experiment. Anionic surfactant (SDS), Cationic surfactant (DTAC) and Nonionic surfactant (AEO-15) was analyzed for their dispersion in slurries from the point of view of static electricity force and steric hindrance space force, and the synergistic mechanism of mixed SDS and AEO-15 on slurries dispersion was put forward. In addition, the effect of the improvement of slurry dispersion on reducing scratching defects on the surface of polished copper blanket was also tested in this paper.

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“…[15][16][17][18] However, the surface of carbon microspheres mostly lacks groups; thus, porous hydrophobic carbon microspheres can only combine with metal ions through van der Waals forces, resulting in a poor adsorption capacity. 19,20 Heteroatom doping, surface treatment, or loading with other materials are effective means to improve the adsorption efficiency. 21,22 Polyphosphazenes (PZSs) are unique hybrid inorganicorganic polymers consisting of alternating backbones of nitrogen and phosphorus atoms, each with two identical or different organic/inorganic side groups.…”

Section: Introductionmentioning

confidence: 99%

“…Carbon materials used for adsorption mainly include activated carbon, graphene oxide, carbon nanotubes, carbon aerogel, and carbon microspheres 15–18 . However, the surface of carbon microspheres mostly lacks groups; thus, porous hydrophobic carbon microspheres can only combine with metal ions through van der Waals forces, resulting in a poor adsorption capacity 19,20 . Heteroatom doping, surface treatment, or loading with other materials are effective means to improve the adsorption efficiency 21,22 …”

Section: Introductionmentioning

confidence: 99%

Enhanced adsorption behavior of U(VI) using PZSC/ZnO ceramic composite derived from polyphosphazene

et al. 2022

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In this study, a new type of ceramic composite (PZSC/ZnO) was successfully synthesized using N, P, and S co-doped carbon microspheres derived from polyphosphazene with zinc oxide. The morphology and structure were characterized by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, energy-dispersive spectroscopy, Raman, X-ray diffraction, BET, and thermogravimetric. Batch experiments were used to explore the adsorption performance under different pH values, initial concentrations, contact times, and temperatures. The results showed that the maximum adsorption capacity of the PZSC/ZnO ceramic composite for uranium was 470.5 mg/g (pH = 5.5, t = 40 min, and T = 25 • C). The adsorption process followed the nonlinear Langmuir model and the pseudo-second-order kinetic model, demonstrating that the monolayered combination of U(VI) with the PZSC/ZnO ceramic composite and the adsorption mechanism was chemical adsorption. Thermodynamic data revealed that the adsorption was a spontaneous endothermic process. Furthermore, P and N may be involved in the adsorption of uranyl ions through binding to the O atoms from ZnO. The main forces between U(VI) and the PZSC/ZnO ceramic composite were attributed to ZnO and heteroatoms doped in the material.

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Enhanced surface activity of activated carbon by surfactants synergism

Abstract: Enhancement of AC surface activity by surfactants synergism for electrochemical applications.

Cited by 38 publications

References 57 publications

Influence of Surface Potential on the Capacitive Performance of the TiO₂ Thin-Film Electrode with Different Crystalline Forms

Influence of Surface Potential on the Capacitive Performance of the TiO₂ Thin-Film Electrode with Different Crystalline Forms

Methods and Mechanistic Analysis of Improving the Dispersion of Nano Silica Colloidal Particles in Chemical Mechanical Polishing Slurries

Enhanced adsorption behavior of U(VI) using PZSC/ZnO ceramic composite derived from polyphosphazene

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Enhanced surface activity of activated carbon by surfactants synergism

Abstract: Enhancement of AC surface activity by surfactants synergism for electrochemical applications.

Cited by 38 publications

References 57 publications

Influence of Surface Potential on the Capacitive Performance of the TiO2 Thin-Film Electrode with Different Crystalline Forms

Influence of Surface Potential on the Capacitive Performance of the TiO2 Thin-Film Electrode with Different Crystalline Forms

Methods and Mechanistic Analysis of Improving the Dispersion of Nano Silica Colloidal Particles in Chemical Mechanical Polishing Slurries

Enhanced adsorption behavior of U(VI) using PZSC/ZnO ceramic composite derived from polyphosphazene

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Influence of Surface Potential on the Capacitive Performance of the TiO₂ Thin-Film Electrode with Different Crystalline Forms

Influence of Surface Potential on the Capacitive Performance of the TiO₂ Thin-Film Electrode with Different Crystalline Forms