Fabrication of ZnO/CNTs for Application in CO2 Sensor at Room Temperature

Saad, Rana; Gamal, Ahmed; Zayed, Mohamed; Ahmed, Ashour M.; Shaban, Mohamed; BinSabt, Mohammad H.; Rabia, Mohamed; Hamdy, Hany

doi:10.3390/nano11113087

Cited by 43 publications

(21 citation statements)

References 74 publications

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“…The morphologies of the prepared PMT, roll‐GO, and PMT/roll‐GO are confirmed using the SEM analyses as shown in Figure 2A‐C, respectively. These morphological analyses are confirmed using the Image J software 27 as shown in Figure 2D‐F, respectively. From Figure 2A,D, PMT has a homogeneous porous network surface.…”

Section: Resultsmentioning

confidence: 53%

Poly(m‐toluidine)/rolled graphene oxide nanocomposite photocathode for hydrogen generation from wastewater

Rabia

Hadia

Farid

et al. 2022

Intl J of Energy Research

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This study provides hydrogen gas fuel as a renewable energy source. The production of H 2 was carried out through the photocatalytic decomposition of sewage water using highly efficient poly(m-toluidine) (PMT)/rolled graphene oxide (roll-GO) as photoelectrode. The preparation of PMT thin film was carried out on glass using the in situ electropolymerization reaction from an acid medium. Then, the roll-GO was deposited on this thin film using the casting method from the GO solution. The full characteristic analyses Fouriertransform infrared, X-ray diffraction, scanning electron microscope, transmitted electron microscope, and UV-Vis spectroscopy confirmed the chemical structural, morphological, and optical properties of the prepared nanomaterials. The morphology characteristic confirmed the formation of nanopores PMT, rolled GO, and rolled porous nanocomposite. The bandgap values for PMT, roll-GO, and PMT/roll-GO nanomaterials were 2.38, 2.67, and 1.65 eV, respectively. The hydrogen generation was carried out through the photoelectrode glass/PMT/roll-GO with a current density (J ph ) value of 0.08 mA.cm À2 at +1 V, with hydrogen moles of 10 μmole/h.cm À2 . The J ph values changed from 0.078 to 0.053 mA.cm À2 with changing the monochromatic light wavelengths from 390 to 636 nm, respectively. Moreover, the J ph values increased from 0.078 to 0.295 mA.cm À2 which is followed by an increase in the temperature from 20 C to 60 C, respectively. The thermodynamic parameters were calculated, in which the Ea, ΔS*, and ΔH* values were

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Section: Resultsmentioning

confidence: 53%

Poly(m‐toluidine)/rolled graphene oxide nanocomposite photocathode for hydrogen generation from wastewater

Rabia

Hadia

Farid

et al. 2022

Intl J of Energy Research

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“…The behavior of the Na‐CdS optoelectronic device depends on R, D, and external quantum efficiency (EQE) 39 . The R value 40 depends on the current density values in light and dark, also it depends on the light power as shown in Equation () 1 .…”

Section: Resultsmentioning

confidence: 99%

“…The device The behavior of the Na-CdS optoelectronic device depends on R, D, and external quantum efficiency (EQE). 39 The R value 40 depends on the current density values in light and dark, also it depends on the light power as shown in Equation ( 4). 1 While, the D value is calculated from Equation (5), 41 in which D value depends on R values and the electron charge (e = 1.60*10 À19 C), dark current J d , and the surface area of the sample.…”

Section: Response Of Na-cds Optoelectronic Device For Monochromatic L...mentioning

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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“…The morphology of the prepared PANI is shown in Figure 2 a, moreover the software Image J program modeling [ 28 ] is shown in Figure 2 c. From both figures, the formation of a homogeneous nonporous surface appears clearly. The great roughness and small porousness in the PANI surface qualify it for composite well with additional nanomaterials.…”

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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Fabrication of ZnO/CNTs for Application in CO2 Sensor at Room Temperature

Cited by 43 publications

References 74 publications

Poly(m‐toluidine)/rolled graphene oxide nanocomposite photocathode for hydrogen generation from wastewater

Poly(m‐toluidine)/rolled graphene oxide nanocomposite photocathode for hydrogen generation from wastewater

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

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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