Nanoporous TiN/TiO2/Alumina Membrane for Photoelectrochemical Hydrogen Production from Sewage Water

Almohammedi, Abdullah; Shaban, Mohamed; Mostafa, Huda; Rabia, Mohamed

doi:10.3390/nano11102617

Cited by 29 publications

(22 citation statements)

References 77 publications

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“…The energy level of HOMO is higher than the conducting band of the PbI 2 , so there is energy transfer and collection of electrons over the conducting band of PbI 2 . Although there is a Schottky barrier [ 33 ] that affects the electron transfer from the PANI to PbI 2 and causes slow motion of electrons that appear in the behavior of the J ph -potential relation ( Figure 4 a). This depletion layer does not affect the electron transfer, in which the produced J ph value is 0.095 mA.cm −2 at 100 mW.cm −2 , and finally, the electrons reach the water molecules for the spitting process and H 2 generation reaction.…”

Section: Resultsmentioning

confidence: 99%

Conversion of Sewage Water into H2 Gas Fuel Using Hexagonal Nanosheets of the Polyaniline-Assisted Deposition of PbI2 as a Nanocomposite Photocathode with the Theoretical Qualitative Ab-Initio Calculation of the H2O Splitting

et al. 2022

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This study is very promising for providing a renewable enrgy (H2 gas fuel) under the elctrochemical splitting of the wastwater (sewage water). This study has double benefits: hydrogen generation and contaminations removel. This study is carried out on sewage water, third stage treated, from Beni-Suef city, Egypt. Antimony tin oxide (ATO)/polyaniline (PANI)/PbI2 photoelectrode is prepared through the in situ oxidative polymerization of PANI on ATO, then PANI is used as an assistant for PbI2 deposition using the ionic adsorption deposition method. The chemical structural, morphological, electrical, and optical properties of the composite are confirmed using different analytical tools such as X-ray diffreaction (XRD), scanning electron microscope (SEM), transmision electron microscope (TEM), Fourier-transform infrared spectroscopy (FTIR), and UV-Vis spectroscopy. The prepared PbI2 inside the composite has a crystal size of 33 nm (according to the peak at 12.8°) through the XRD analyses device. SEM and TEM confirm the hexagonal PbI2 sheets embedded on the PANI nanopores surface. Moreover, the bandgap values are enhanced very much after the composite formation, in which the bandgap values for PANI and PANI/PbI2 are 3 and 2.51 eV, respectively. The application of ATO/PANI/PbI2 nanocomposite electrode for sewage splitting and H2 generation is carried out through a three-electrode cell. The measurements carreid out using the electrocehical worksattion under th Xenon lamp (100 mW.cm−2). The produced current density (Jph) is 0.095 mA.cm−2 at 100 mW.cm−2 light illumination. The photoelectrode has high reproducibility and stability, in which and the number of H2 moles is 6 µmole.h−1.cm−1. The photoelectrode response to different monochromatic light, in which the produced Jph decreases from 0.077 to 0.072 mA.cm−2 with decreasing of the wavelengths from 390 to 636 nm, respectively. These values confirms the high response of the ATO/PANI/PbI2 nanocomposite electrode for the light illuminaton and hydrogen genration under broad light region. The thermodynamic parameters: activation energy (Ea), enthalpy (ΔH*), and entropy (ΔS*) values are 7.33 kJ/mol, −4.7 kJ/mol, and 203.3 J/mol.K, respectively. The small values of ΔS* relted to the high sesnivity of the prepared elctrode for the water splitting and then the hydrogen gneration. Finally, a theoretical study was mentioned for calculation geometry, electrochemical, and thermochemistry properties of the polyaniline/PbI2 nanocomposite as compared with that for the polyaniline.

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Section: Resultsmentioning

confidence: 99%

Conversion of Sewage Water into H2 Gas Fuel Using Hexagonal Nanosheets of the Polyaniline-Assisted Deposition of PbI2 as a Nanocomposite Photocathode with the Theoretical Qualitative Ab-Initio Calculation of the H2O Splitting

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“…Metal oxides have many benefits that qualified them to be ideal photocatalytic materials for H 2 production such as low cost, stability, and easy preparation [10,11]. There are some methods for enhancing the photocatalytic activity such as increasing the surface area (nanofibers, nanowires, and nanotubes) [12][13][14]. Another way to enhance the photocatalytic activity is through the use of plasmonic materials [15,16], or materials with high thermal capacity such as Cu metal.…”

Section: Introductionmentioning

confidence: 99%

Converting Sewage Water into H2 Fuel Gas Using Cu/CuO Nanoporous Photocatalytic Electrodes

et al. 2022

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This work reports on H2 fuel generation from sewage water using Cu/CuO nanoporous (NP) electrodes. This is a novel concept for converting contaminated water into H2 fuel. The preparation of Cu/CuO NP was achieved using a simple thermal combustion process of Cu metallic foil at 550 °C for 1 h. The Cu/CuO surface consists of island-like structures, with an inter-distance of 100 nm. Each island has a highly porous surface with a pore diameter of about 250 nm. X-ray diffraction (XRD) confirmed the formation of monoclinic Cu/CuO NP material with a crystallite size of 89 nm. The prepared Cu/CuO photoelectrode was applied for H2 generation from sewage water achieving an incident to photon conversion efficiency (IPCE) of 14.6%. Further, the effects of light intensity and wavelength on the photoelectrode performance were assessed. The current density (Jph) value increased from 2.17 to 4.7 mA·cm−2 upon raising the light power density from 50 to 100 mW·cm−2. Moreover, the enthalpy (ΔH*) and entropy (ΔS*) values of Cu/CuO electrode were determined as 9.519 KJ mol−1 and 180.4 JK−1·mol−1, respectively. The results obtained in the present study are very promising for solving the problem of energy in far regions by converting sewage water to H2 fuel.

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“…The preparations of the high‐quality materials occurred using many different techniques such as magnetron sputtering, chemical bath deposition, spray pyrolysis, sol‐gel, chemical vapor deposition, laser pulsed, and atomic layer deposition 8‐17 . From the preparation methods, the prepared nanomaterials accepted different chemical or physical properties that qualify their applications in optoelectronic devices 18 .…”

Section: Introductionmentioning

confidence: 99%

“…6,7 The preparations of the high-quality materials occurred using many different techniques such as magnetron sputtering, chemical bath deposition, spray pyrolysis, sol-gel, chemical vapor deposition, laser pulsed, and atomic layer deposition. [8][9][10][11][12][13][14][15][16][17] From the preparation methods, the prepared nanomaterials accepted different chemical or physical properties that qualify their applications in optoelectronic devices. 18 From the high technology field, most electronic devices have optoelectronic applications such as aircrafts, smart windows, cameras, light controller, and spectrophotometers.…”

Section: Introductionmentioning

confidence: 99%

The efficiency of M (M = Li, Na, or Cs) doped CdS nanomaterials in optoelectronic applications

Awad

Shaban

Rabia

2022

Intl J of Energy Research

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Summary A novel Cu/Na‐CdS optoelectronic photodetector is prepared and applied for detecting the light in the UV and Vis regions with high efficiency. First, CdS and M‐CdS nanomaterials (M = Li, Na, or Cs) are prepared using the hydrothermal method at 180°C for 24 hours. The prepared nanomaterials have crystalline structures that are confirmed through X‐ray diffraction analyses. Na‐CdS has the optimum structure with a crystalline size of 17.5 nm and porous structure looks small grass. Moreover, Na‐CdS has the optimum optical absorbance and bandgap of 1.78 eV. Na‐CdS nanomaterial is applied as optoelectronic material for light detection under different intensities and wavelengths. The device detected the light in the UV and Vis regions with high efficiency. The current density (Jph) values increased highly in light in compared with dark conditions, in which Jph changed from 20 μA cm−2 to 2.88 mA cm−2 in dark and light, respectively. The detectivity (D) and photoresponsivity (R) were 1.5 × 1010 Jones and 38 mA W−1, respectively. Also, the external quantum efficiency (EQE) was 12% at 390 nm and 100 mW cm−2. The high properties of Na‐CdS optoelectronic qualify it to be applicable in the industrial field incorporated with high technology devices such as cameras and spacecraft.

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Nanoporous TiN/TiO2/Alumina Membrane for Photoelectrochemical Hydrogen Production from Sewage Water

Cited by 29 publications

References 77 publications

Conversion of Sewage Water into H2 Gas Fuel Using Hexagonal Nanosheets of the Polyaniline-Assisted Deposition of PbI2 as a Nanocomposite Photocathode with the Theoretical Qualitative Ab-Initio Calculation of the H2O Splitting

Conversion of Sewage Water into H2 Gas Fuel Using Hexagonal Nanosheets of the Polyaniline-Assisted Deposition of PbI2 as a Nanocomposite Photocathode with the Theoretical Qualitative Ab-Initio Calculation of the H2O Splitting

Converting Sewage Water into H2 Fuel Gas Using Cu/CuO Nanoporous Photocatalytic Electrodes

The efficiency of M (M = Li, Na, or Cs) doped CdS nanomaterials in optoelectronic applications

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