Photocatalytic Conversion of CO2Using ZnOSemiconductor by Hydrothermal Method

Adegoke, Kayode Adesina; Iqbal, Muzaffar; Louis, Hitler; Jan, Saad Ullah; Mateen, Anam; Bello, Olugbenga Solomon

doi:10.21743/pjaec/2018.06.01

Cited by 16 publications

(5 citation statements)

References 154 publications

(209 reference statements)

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“…As a result, an anisotropic growth mechanism is observed, leading to the formation of 1D NSs, such as nanorods or nanowires. [28][29][30][31] The wurzite crystal structure of ZnO and its hexagonal unit cell with crystallographic face, e. g. ( 0001), (20), and (010) plane are presented in Figure 1a, where its tetrahe-dral-coordinated Zn 2 + and O 2À ions are bound along the c-axis, creating the periodic planes. In ɛ-Zn(OH) 2 , each zinc is surrounded by four hydroxyl groups, and each hydroxyl group is coordinated with zinc ions.…”

Section: Resultsmentioning

confidence: 99%

“…The rapid growth of ZnO NSs occurs predominantly along the ±(0001), which exposes the other surfaces to the solution. As a result, an anisotropic growth mechanism is observed, leading to the formation of 1D NSs, such as nanorods or nanowires [28–31] . The wurzite crystal structure of ZnO and its hexagonal unit cell with crystallographic face, e. g. (0001), (20), and (010) plane are presented in Figure 1a, where its tetrahedral‐coordinated Zn 2+ and O 2− ions are bound along the c ‐axis, creating the periodic planes.…”

Section: Resultsmentioning

confidence: 99%

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Facile Formation of Sulfurized Nanorod‐Like ZnO/Zn(OH)₂ and Hierarchical Flower‐Like γ‐Zn(OH)₂/ϵ‐Zn(OH)₂ from a Green Synthesis and Application as Luminescent Solar Concentrator

Rodrigues,

Onishi,

Ribeiro

2023

ChemPhysChem

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This research endeavors to overcome the significant challenge of developing materials that simultaneously possess photostability and photosensitivity to UV‐visible irradiation. Sulfurized NR‐like ZnO/Zn(OH)2 and hierarchical flower‐like γ‐Zn(OH)2/ε‐Zn(OH)2 were identified from XRD diffraction patterns and Raman vibrational modes. The sulfurized material, observed by FEG‐SEM and TEM, showed diameters ranging from 10 and 40 nm and lengths exceeding 200 nm. The S2‐ ions intercalated Zn2+, modulating NRs to dumbbell‐like microrods. SAED and HRTEM illustrated the atomic structure in (101) crystal plane. Its band gap of 3.0 eV value from a direct transition was attributed to the oxygen vacancies, contributing also to the deep‐level emissions at 422 nm and 485 nm. BET indicated specific surface area of 4.4 m2 g‐1 and pore size as mesoporosity, higher values than the non‐sulfurized one. These findings were consistent with the observed photocurrent, photostability and PL, further supporting the suitability of sulfurized NR‐like ZnO/Zn(OH)2 as a promising candidate for LSC‐PV system.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Facile Formation of Sulfurized Nanorod‐Like ZnO/Zn(OH)₂ and Hierarchical Flower‐Like γ‐Zn(OH)₂/ϵ‐Zn(OH)₂ from a Green Synthesis and Application as Luminescent Solar Concentrator

Rodrigues,

Onishi,

Ribeiro

2023

ChemPhysChem

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“…SnO 2 is a popular catalyst and has the potential to catalyze many organic contaminants under UV light (Hoda-Fujishima effect) [33]. Under ambient conditions and UV-VIS light, toxic organic contaminants that are difficult to decompose can easily be oxidized to H 2 O and CO 2 by employing metal-based catalysts and particularly SnO 2 as a catalyst [34][35]. UV light illuminates the surface of the photocatalytic surface and thus produces h + hole in the valence band and an ein the conduction band.…”

Section: Results Indicated a Reduction In Latticementioning

confidence: 99%

Investigating the Effect of Dwell Time on the Physical Properties of Nano-sized Tin dioxide (SnO2) Prepared Through a Continuous Microwave Flow Process

Akram¹

2021

Pak J Anal Environ Chem

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Tin dioxide (SnO2) is a well-known catalytic material used to catalyze different organic dyes and gas sensors. Similarly, it is also considered a good sensing and optoelectronic material. In this work, SnO2 has been synthesized using a microwave-assisted continuous flow method. The effect of dwell time was utilized to study its effects on the physical properties of SnO2. X-ray Diffraction (XRD), Fourier Transform Infrared (FTIR), Transmission Electron Microscopy (TEM) and Bruner Emmit-Teller (BET) techniques were used to characterize the synthesized SnO2. UV-Visible spectroscopy technique was employed to calculate the energy bandgap, which exhibited a decrease in the energy bandgap from 3.44 to 3.33 eV on increasing the dwell time. XRD results exhibited an increase in the degree of crystallinity from 56 to 63% and a reduction in the particle size from 3.74 to 2.75 nm. Where, BET study revealed a shrinkage in the surface area from 159 to 154 m2g- 1. Photoluminescence (PL) study was conducted to investigate the surface defects. Photocatalytic efficiency of the SnO2 was probed against the photodegradation of methylene blue dye and this study revealed that SnO2 is a good photocatalytic material.

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“…Furthermore, CO 2 presents hazards comparable to those of CH 4 [14]. It can constitute a danger of suffocation once it gathers in an enclosure by dislodging the air and resulting in anaerobic conditions [3].…”

Section: Introductionmentioning

confidence: 99%

Temperature Influence on the Variability and Emission of CH4 and CO2 from a Former Manchester Landfill

Nwachukwu

Tyopine²,

Ephraim

2022

Pak J Anal Environ Chem

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Analysis of datasets in time order was carried out to determine the consequence of atmospheric temperature on the changes in CH4and CO2concentrations at a former landfill site. The Gasclam(in-borehole gas monitor) was used to collect field data of CH4/CO2 concentrations and the environmental parameters. The magnitude of the relationship of ground-gas concentration and the barometric temperature was obtained by linear regression analysis. The result reveals variability in CH4 and CO2 concentrations with poor positive relationships of 0.016 and 0.014, respectively, with barometric temperature over the whole sampling period. Despite slightly improving the R2bytaking into account their concentration over single phases of upward and downward limb temperature, single phases of upward limb temperature, and single phases of downward limb temperature, their correlations remained insignificant at a 95% confidence level. The implicationis that temperature (just like pressure) is not the dominant influence on CH4 and CO2 concentrations changes at this site. Having established barometric pressure and temperature asminor controls, a recommendation was made for the establishment of other potential controls(particularly variations in the site water depth) and their degree of control.

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Photocatalytic Conversion of CO2Using ZnOSemiconductor by Hydrothermal Method

Cited by 16 publications

References 154 publications

Facile Formation of Sulfurized Nanorod‐Like ZnO/Zn(OH)₂ and Hierarchical Flower‐Like γ‐Zn(OH)₂/ϵ‐Zn(OH)₂ from a Green Synthesis and Application as Luminescent Solar Concentrator

Facile Formation of Sulfurized Nanorod‐Like ZnO/Zn(OH)₂ and Hierarchical Flower‐Like γ‐Zn(OH)₂/ϵ‐Zn(OH)₂ from a Green Synthesis and Application as Luminescent Solar Concentrator

Investigating the Effect of Dwell Time on the Physical Properties of Nano-sized Tin dioxide (SnO2) Prepared Through a Continuous Microwave Flow Process

Temperature Influence on the Variability and Emission of CH4 and CO2 from a Former Manchester Landfill

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Photocatalytic Conversion of CO2Using ZnOSemiconductor by Hydrothermal Method

Cited by 16 publications

References 154 publications

Facile Formation of Sulfurized Nanorod‐Like ZnO/Zn(OH)2 and Hierarchical Flower‐Like γ‐Zn(OH)2/ϵ‐Zn(OH)2 from a Green Synthesis and Application as Luminescent Solar Concentrator

Facile Formation of Sulfurized Nanorod‐Like ZnO/Zn(OH)2 and Hierarchical Flower‐Like γ‐Zn(OH)2/ϵ‐Zn(OH)2 from a Green Synthesis and Application as Luminescent Solar Concentrator

Investigating the Effect of Dwell Time on the Physical Properties of Nano-sized Tin dioxide (SnO2) Prepared Through a Continuous Microwave Flow Process

Temperature Influence on the Variability and Emission of CH4 and CO2 from a Former Manchester Landfill

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Product

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Facile Formation of Sulfurized Nanorod‐Like ZnO/Zn(OH)₂ and Hierarchical Flower‐Like γ‐Zn(OH)₂/ϵ‐Zn(OH)₂ from a Green Synthesis and Application as Luminescent Solar Concentrator

Facile Formation of Sulfurized Nanorod‐Like ZnO/Zn(OH)₂ and Hierarchical Flower‐Like γ‐Zn(OH)₂/ϵ‐Zn(OH)₂ from a Green Synthesis and Application as Luminescent Solar Concentrator