High-Performance pH Sensor Electrodes Based on a Hexagonal Pt Nanoparticle Array-Coated Nanoporous Alumina Membrane

Altowyan, Abeer S.; Shaban, Mohamed; Gamel, Asmaa; Gamal, Ahmed; Ali, Mona F.; Rabia, Mohamed

doi:10.3390/ma15196515

Cited by 8 publications

(5 citation statements)

References 59 publications

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“…Our team has studied the application of a template as a pH sensor for the detection of the H + ion concentration in solutions. The great pore order increases the sensitivity very much [21].…”

Section: Introductionmentioning

confidence: 99%

Design and Characterization of Nanostructured Ag2O-Ag/Au Based on Al2O3 Template Membrane for Photoelectrochemical Water Splitting and Hydrogen Generation

et al. 2022

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This study considers the progress of our previous study for hydrogen generation depends on the highly ordered metal oxide/plasmonic materials. This study reports the preparation of Ag2O-Ag/Au on the Al2O3 template (Ag2O-Ag/Au/Al2O3) for photocatalytic sewage water splitting and H2 gas production. Ni imprinting, followed by two-step anodization procedures, prepare the Al2O3 template. Ag2O-Ag and Au materials are prepared inside the template using electrochemical deposition and sputter coating methods, respectively. The chemical structure is confirmed by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analyses, in which all the peaks characterized by Ag2O, Ag, Au, and Al2O3 are confirmed. The scanning electron microscope (SEM) images confirm the preparation of a highly ordered hexagonal Al2O3 template with a pore wide of about 350 nm. Ag2O-Ag/Au accept the same morphology after the deposition process, in which the materials are deposited inside and on the Al2O3 template, in which the hexagonal pores are still opened after the deposition process. These open pores increase the surface area and then enhance the optical and electrical properties. For the H2 generated from sewage water, the produced Ag2O-Ag/Au on the Al2O3 photoelectrode achieved an incident to photon conversion efficiency (IPCE) of 30%. Additionally, the impact of light wavelength and intensity on photoelectrode performance is evaluated. Under increasing the light total power from 25 to 75 mW.cm−2, the current density (Jph) value goes up from 8.9 to 9.5 mA.cm−2. The current study’s findings show promising results for resolving the issue of energy in remote areas by turning wastewater into hydrogen fuel.

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Section: Introductionmentioning

confidence: 99%

Design and Characterization of Nanostructured Ag2O-Ag/Au Based on Al2O3 Template Membrane for Photoelectrochemical Water Splitting and Hydrogen Generation

et al. 2022

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“…The XRD pattern for the prepared P2ABT and Ag 2 S-Ag 2 O-Ag/P2ABT nanocomposite are shown in Figure 3 a. The P2ABT (black curve) has an abroad peak, but there are two semi-sharp peaks located at 24.6 and 28.0; this behavior illustrates the formation of crystalline polymer materials [ 43 ].…”

Section: Resultsmentioning

confidence: 99%

Ag2S-Ag2O-Ag/poly-2-aminobenzene-1-thiol Nanocomposite as a Promising Two-Electrode Symmetric Supercapacitor: Tested in Acidic and Basic Mediums

et al. 2023

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A Ag2S-Ag2O-Ag/poly-2-aminobenzene-1-thiol (P2ABT) nanocomposite was prepared using the photopolymerization reaction using AgNO3 as an oxidant. The size of the nanocomposite was about 40 nm, in which the morphology was confirmed using TEM and SEM analyses. The functional groups of Ag2S-Ag2O-Ag/P2ABT were confirmed using FTIR; also, XRD confirmed the inorganic Ag2S, Ag, and Ag2O formation. This nanocomposite has great performance in supercapacitor applications, with it tested in acidic (1.0 M HCl) and basic mediums (1.0 M NaOH). This pseudo-capacitor has great performance that appeared through the charge time in an acid medium in comparison to the basic medium with values of 118 s and 103 s, correspondingly. The cyclic voltammetry (CV) analysis further confirmed the excellent performance of the supercapacitor material, as indicated by the large area under the cyclic curve. The specific capacitance (CS) and energy density (E) values (at 0.3 A/g) were 92.5 and 44.4 F/g and 5.0 and 2.52 W·h·Kg−1 in the acidic and basic mediums, correspondingly. The charge transfer was studied through a Nyquist plot, and the produced Rs values were 4.9 and 6.2 Ω, respectively. Building on these findings, our objective is to make a significant contribution to the progress of supercapacitor technology through a prototype design soon.

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“…The roll-GO/PANI composite demonstrates a good optical property rather than the PANI material alone due to its improved composition gathering both PANI and roll-GO materials' properties. The absorbance covers the UV, Vis, and IR regions, with an optimum absorbance peak at 310 and 650 nm assigned to electron transition under the photon incidence [20][21][22].…”

Section: Analysesmentioning

confidence: 99%

Impact of Rolled Graphene Oxide Grown on Polyaniline for Photodetection: Future Challenging Opto-Device

et al. 2023

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Rolled graphene oxide (roll-GO) with anew morphological properties than normal graphene is synthesized using modified Hummer. Then, the roll-GO/PANI composite is prepared through the adsorption of roll-GO on the surface of the PANI film, that performed through the oxidative polymerization method. The developed composite displays a small bandgap of 1.9 eV and shows a high optical property extends through a wide optical region from UV to IR regions. The chemical structure and function groups are confirmed using the XRD and FTIR. The roll-GO/PANI composite was investigated as a photodetector. The effects of different irradiation light conditions and the monochromatic wavelengths were tested through the measurements of the produced current density, Jph. The optical photon response exhibited excellent light sensitivity of the photodetector. The Jph enhanced highly under light (0.34 mA·cm−2) compared to dark conditions (0.007 mA·cm−2). Jph reached 0.24, 0.23, 0.14, and 0.09 mA·cm−2 under 340, 440, 540, and 730 nm, respectively. The photodetector detectivity (D) and photoresponsivity (R) are found to equal 0.45 × 109 Jones and 2.25 mA·W−1, respectively.

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High-Performance pH Sensor Electrodes Based on a Hexagonal Pt Nanoparticle Array-Coated Nanoporous Alumina Membrane

Cited by 8 publications

References 59 publications

Design and Characterization of Nanostructured Ag2O-Ag/Au Based on Al2O3 Template Membrane for Photoelectrochemical Water Splitting and Hydrogen Generation

Design and Characterization of Nanostructured Ag2O-Ag/Au Based on Al2O3 Template Membrane for Photoelectrochemical Water Splitting and Hydrogen Generation

Ag2S-Ag2O-Ag/poly-2-aminobenzene-1-thiol Nanocomposite as a Promising Two-Electrode Symmetric Supercapacitor: Tested in Acidic and Basic Mediums

Impact of Rolled Graphene Oxide Grown on Polyaniline for Photodetection: Future Challenging Opto-Device

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