On the behavior of CTAB/CTAOH adlayers on gold single crystal surfaces

Gisbert-González, José M.; Oliver-Pardo, María V.; Sarabia, Francisco; Climent, Vı́ctor; Feliú, Juan M.; Herrero, Enrique

doi:10.1016/j.electacta.2021.138947

Cited by 6 publications

(13 citation statements)

References 38 publications

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“…The results indicated that the behavior of energy storage is governed by the CTAB concentration in EPD fabrication. This phenomenon could be attributed to the MWCNT dispersion and mechanical behavior in the electrode as the bonding behavior of CTAB increases the adhesion of films . The first three cycles of CD profiles exhibited inclining smooth curves at a current density of 10 mA g –1 , attributed to a single-phase reaction of a-FePO 4 (Figure S10).…”

Section: Resultsmentioning

confidence: 98%

“…This phenomenon could be attributed to the MWCNT dispersion and mechanical behavior in the electrode as the bonding behavior of CTAB increases the adhesion of films. 35 The first three cycles of CD profiles exhibited inclining smooth curves at a current density of 10 mA g −1 , attributed to a single-phase reaction of a-FePO 4 (Figure S10). The formation of the cathode electrolyte interphase yielded a high discharge capacity at the first cycle due to the reduction of the electrolyte.…”

Section: Resultsmentioning

confidence: 99%

“…The surfactant facilitated particle coagulation and film formation attributed to the pH-dependent charge and solubility . A negative charge of the surface allows the formation of adlayers with a strong bonding formed by CTA + cations . It has been shown that a limited voltage triggers the coagulation of CTAB in aqueous solutions, thus promoting the binding of deposited particles .…”

Section: Resultsmentioning

confidence: 99%

“…34 A negative charge of the surface allows the formation of adlayers with a strong bonding formed by CTA + cations. 35 It has been shown that a limited voltage triggers the coagulation of CTAB in aqueous solutions, thus promoting the binding of deposited particles. 36 Our results showed that CTAB allows the EPD of active materials onto an aluminum substrate, forming uniform and adherent coatings (Figure 1a, inset).…”

Section: Resultsmentioning

confidence: 99%

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Green Fabrication of Amorphous FePO₄/Carbon Nanotube Electrodes via Electrophoretic Deposition for Sodium-Ion Batteries

et al. 2022

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The conventional fabrication of electrodes for sodium-ion batteries (SIB) involves mixing of the active material with additives and tape-casting on metallic current collectors. Herein, an electrophoretic deposition (EPD) method has been developed to fabricate composite electrodes without using volatile and toxic solvents as well as binders. The approach is based on the EPD of amorphous FePO4 and multiwall carbon nanotube (MWCNT) from aqueous suspensions. The fabrication of FePO4 suspensions containing MWCNT and the controlled co-deposition of both materials are pivotal for the EPD of composites. Multiple dispersants with different properties are investigated as the charging, dispersing, and film-forming agents. The deposition yield of EPD films is measured under various conditions. The atomic force microscopy analysis, engaged with thermogravimetric tests, provides evidence for the formation of adhesive and conductive FePO4/MWCNT films. The dispersant concentration is optimized in order to achieve high capacity. The composite electrode, prepared by EPD, delivers a discharge capacity of 142.2 mA h g–1 at a current of 10 mA g–1. Another important finding is the possibility to fabricate full-cell SIBs, containing presodiated hard carbon as the anode and a deposited FePO4/MWCNT cathode. The deposited films show adequate capacitance retention as the charge–discharge current increased and stable cycling performance.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Green Fabrication of Amorphous FePO₄/Carbon Nanotube Electrodes via Electrophoretic Deposition for Sodium-Ion Batteries

et al. 2022

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“…Previous research on a hybrid system consisting of synthetic and natural pore-directing molecules was able to produce high surface area carbon microspheres as a result of the combination of gelatin with Pluronic F127 6 . In addition to Pluronic F127, several synthetic templates such as Pluronic P123, CTAB, and CTAOH can control porosity based on their molecular weight, chain length and functional groups 19 , 25 , 26 . These synthetic pore templates have succeeded in producing porous materials such as MCM-41, MCM-48, SBA-15 and KIT 2 , 27 – 29 .…”

Section: Introductionmentioning

confidence: 99%

The effect of gelatin as pore expander in green synthesis mesoporous silica for methylene blue adsorption

Ulfa

Prasetyoko

Trisunaryanti

et al. 2022

Sci Rep

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Mesoporous silica NSG had been synthesized while employing gelatin as a natural template to successfully increase the particle size and expand the pore diameter of NSG. All silica samples exhibited a similar XRD pattern with a broad peak centred at 2θ = 22.9°, as the characteristic of amorphous silica. FTIR results showed that the reduction of Si–O–Si symmetric stretching vibrations at 1075 cm−1 was due to the use of a high percentage of gelatin. Moreover, TEM analysis displayed the mesoporous channels in the form of a honeycomb structure with a diameter of ± 6 nm. Gelatin enhanced the surface area of silica from 467 to 510 m2/g, the pore volume from 0.64 to 0.72 cc/g and expanded the pore diameter from 3.5 nm to 6.0 nm. The expansion of the ordered mesopores with the increase of P123: gelatin ratios was elucidated by the pore size distribution. The adsorption capacity of methylene blue (MB) was improved on mesoporous silica with an expanded pore dimension to give 168 mg/g adsorption capacity within 70 min.

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Increased Sensitivity and Selectivity for As(III) Detection at the Au(111) Surface: Single Crystals and Ultraflat Thin Films Comparison

et al. 2022

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Electrochemical stripping voltammetry electroanalysis sensitivity and selectivity are oftentimes limited by wide variance in analyte electrode surface adsorption and desorption energies. The use of highly oriented Au(111) single crystal and thin film surfaces is shown to decrease this variance and improve detection for arsenic (As) in water. Cyclic voltammetry and linear stripping voltammetry (LSV) analysis on Au oriented and polyoriented electrode surfaces demonstrated that As deposition and oxidation is a complex surface-structure-dependent process. An electrochemical quartz microbalance indicated that As is deposited in multiple layers when in high concentrations and does not permanently reorganize the Au surface after stripping. LSV analysis of As(III) on the Au(111), Au(110), Au(100), and Au polyoriented single crystal, Au(Poly), model electrode surfaces showed that Au(111) had the highest peak to background ratio and narrowest peak width for As oxidative stripping. Furthermore, an ultraflat Au(111) thin film, Au(UTF), was then compared to the Au(111) and Au(Poly) single crystals and showed a bulk Au(111) single crystal-like response. The Au(UTF) was then used to perform a calibration curve to detect between 2.5 and 100 μg L–1 As(III) and resulted in a theoretical limit of detection of 0.0065 μg L–1 in 0.5 M H2SO4. The results from this study indicate that the Au(UTF) surface provides the sensitivity necessary for detection of trace concentrations of As in water at or below the maximum contaminant level (MCL) of 10 μg L–1.

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On the behavior of CTAB/CTAOH adlayers on gold single crystal surfaces

Cited by 6 publications

References 38 publications

Green Fabrication of Amorphous FePO₄/Carbon Nanotube Electrodes via Electrophoretic Deposition for Sodium-Ion Batteries

Green Fabrication of Amorphous FePO₄/Carbon Nanotube Electrodes via Electrophoretic Deposition for Sodium-Ion Batteries

The effect of gelatin as pore expander in green synthesis mesoporous silica for methylene blue adsorption

Increased Sensitivity and Selectivity for As(III) Detection at the Au(111) Surface: Single Crystals and Ultraflat Thin Films Comparison

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On the behavior of CTAB/CTAOH adlayers on gold single crystal surfaces

Cited by 6 publications

References 38 publications

Green Fabrication of Amorphous FePO4/Carbon Nanotube Electrodes via Electrophoretic Deposition for Sodium-Ion Batteries

Green Fabrication of Amorphous FePO4/Carbon Nanotube Electrodes via Electrophoretic Deposition for Sodium-Ion Batteries

The effect of gelatin as pore expander in green synthesis mesoporous silica for methylene blue adsorption

Increased Sensitivity and Selectivity for As(III) Detection at the Au(111) Surface: Single Crystals and Ultraflat Thin Films Comparison

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Product

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Green Fabrication of Amorphous FePO₄/Carbon Nanotube Electrodes via Electrophoretic Deposition for Sodium-Ion Batteries

Green Fabrication of Amorphous FePO₄/Carbon Nanotube Electrodes via Electrophoretic Deposition for Sodium-Ion Batteries