Photocatalytic Evaluation of the ZrO2:Zn5(OH)6(CO3)2 Composite for the H2 Production via Water Splitting

Tzompantzi-Flores, C.; Castillo-Rodríguez, J.C.; Gómez, R.; Pérez-Hernández, R.; Santolalla-Vargas, C.E.; Tzompantzi, Francisco

doi:10.1007/s11244-020-01236-9

Cited by 9 publications

(1 citation statement)

References 47 publications

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“…The HZ-TiO 2 sample exhibits a broad absorption band in the spectral range lower than 375 nm with a absorption maximum at 244 nm. This spectrum can be attributed to the presence of TiO 2 , since several studies have shown that the absorbance of hydrozincite does not exceed 250 nm (Turianicová et al 2016;Cherepanova et al 2017b;Liu and Teng 2018b;Tzompantzi-Flores et al 2020). This absorption band is due to the charge transfer between conduction band of the Ti 4+ metal cation and the valence band of the O 2− ligand.…”

Section: Uv-vis Diffuse Reflection Spectroscopymentioning

confidence: 88%

Enhanced photocatalytic activity of hydrozincite-TiO2 nanocomposite by copper for removal of pharmaceutical pollutant mefenamic acid in aqueous solution

Mersly

Mouchtari

Moujahid

et al. 2022

Environ Sci Pollut Res

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Nanocomposites based on Hydrozincite-TiO 2 and copper-doped HZ-xCu-TiO 2 (x= 0.1; 0.25; 0.35) were synthesized in a single step using the urea method. The samples were characterized by XRD, FTIR, SEM/TEM and DRS. The study of adsorption capacity and photocatalytic efficiency of these nanocomposites have been tested on a pharmaceutical pollutant, mefenamic acid (MFA).Kinetic study of removal of MFA, indicates that this pollutant was adsorbed on the surface of the synthesized phases, according to Langmuir's model. Such adsorption proved to be well adapted in a kinetic pseudo-second order model with capacity of 13.08 mg/g for HZ-0.25Cu-TiO 2 . Subsequently, the kinetics of photocatalytic degradation under UV-visible irradiation was studied according to several parameters, which allowed us to optimize our experimental conditions.The nanocomposite HZ-0.25Cu-TiO 2 showed significant removal efficiency of MFA. Elimination rate reached 100% after 20 min under UV-vis irradiation, and 77% after 7h under visible light irradiation. Repeatability tests have shown that this nanocomposite is extremely stable after six photocatalytic cycles. By-products of MFA were detected by LC/MS. These photoproducts produced by three types of reactions of hydroxylation; cyclization and cleavage of the aromatic ring. MFA underwent complete mineralization after 22 h of irradiation in the presence of the HZ-0.25Cu-TiO 2 .

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Section: Uv-vis Diffuse Reflection Spectroscopymentioning

confidence: 88%

Enhanced photocatalytic activity of hydrozincite-TiO2 nanocomposite by copper for removal of pharmaceutical pollutant mefenamic acid in aqueous solution

Mersly

Mouchtari

Moujahid

et al. 2022

Environ Sci Pollut Res

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ZnS Derived from Hydrozincite Precursor: Impact of the Synthesis‐Solvothermal Temperature on the Photocatalytic Hydrogen Evolution

Piña‐Pérez,

Aguilar‐Martínez,

Santolalla‐Vargas

et al. 2024

ChemistrySelect

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This paper presents the synthesis of ZnS through solvothermal method using hydrozincite (Zn5(CO3)2(OH)6) as a precursor. Zinc sulfide (ZnS) was synthesized at four different temperatures: 80 °C, 100 °C, 140 °C, and 180 °C. All photocatalysts that were synthesized underwent characterization by X‐ray diffraction, scanning electron microscopy, infrared spectroscopy, thermogravimetric analysis, N2 adsorption‐desorption isotherms, diffuse reflectance spectroscopy, and X‐ray photoelectron analysis. The performance of H2 using photocatalysis was evaluated by utilizing methanol as a sacrificial agent. At 80 °C solvothermal temperature, the ZnS exhibited maximum photoactivity, leading to an H2 generation rate of 154.8 μmolh−1. The high photo‐activity of ZnS synthesized at 80 °C was mainly influenced by the crystallite size, which has an essential influence on the specific surface area. The photocatalytic efficiency of the most active material decreased by approximately 17 % over four reaction cycles due to the photo corrosion effect, with ZnSO3 being the primary by‐product formed after the reaction.

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Novel SnO2-modified hydrozincite photocatalyst: Material design and application in efficient micropollutants degradation in wastewater

Castillo Rodríguez,

Sarabia Ruedas,

Marco Buj

et al. 2024

Catalysis Today

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Photocatalytic Evaluation of the ZrO2:Zn5(OH)6(CO3)2 Composite for the H2 Production via Water Splitting

Cited by 9 publications

References 47 publications

Enhanced photocatalytic activity of hydrozincite-TiO2 nanocomposite by copper for removal of pharmaceutical pollutant mefenamic acid in aqueous solution

Enhanced photocatalytic activity of hydrozincite-TiO2 nanocomposite by copper for removal of pharmaceutical pollutant mefenamic acid in aqueous solution

ZnS Derived from Hydrozincite Precursor: Impact of the Synthesis‐Solvothermal Temperature on the Photocatalytic Hydrogen Evolution

Novel SnO2-modified hydrozincite photocatalyst: Material design and application in efficient micropollutants degradation in wastewater

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