High photoactivity of ZrxOy-Bi2O2(CO3) composite materials prepared by one-step synthesis for efficient photodegradation of 4-chlorophenol in water

Castillo-Rodríguez, J.C.; Tzompantzi, Francisco; Tzompantzi-Flores, C.; Velásquez-Torres, M.E.; Gómez, R.; Santolalla-Vargas, C.E.; Lémus, M.A. Álvarez; Ramos-Ramírez, Esthela; Montes, G. Del Ángel

doi:10.1016/j.jphotochem.2022.114285

Cited by 6 publications

(4 citation statements)

References 53 publications

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“…When the reaction was carried out and the presence of oxygen was suppressed to inhibit the formation of superoxide radicals, the degradation of the phenol molecules in the solution did not occur, as depicted in Figure 6a. A similar behavior is observed when ammonium oxalate is present in the system reaction, acting as a hole scavenger [24] (Figure 6b). Thus, the phenol concentration did not decrease as it was previously observed in Figure 5d.…”

Section: Detection Of Active Species (⋅Oh ⋅O2− and H+)supporting

confidence: 78%

“…Finally, the fourth signal (V o ) at 527.96 eV is related to the presence of adsorbed surface oxygen on surface defects as oxygen vacancies. [24] For the Zn/AlÀ Co(0.3) hydrotalcite, the O 1s region was shifted to lower energies from 531.2 to 530.29 eV, as well as the four contributions. Table 1 summarizes the positions and full width at half maximum (FWMH) of the peaks associated with the different oxygen species as well as their relative atomic percentage (at %).…”

Section: Resultsmentioning

confidence: 91%

“…The third signal (O−M) at 529.26 eV is assigned to the lattice oxygen bound to metal cations. Finally, the fourth signal (V o ) at 527.96 eV is related to the presence of adsorbed surface oxygen on surface defects as oxygen vacancies [24] . For the Zn/Al−Co(0.3) hydrotalcite, the O 1s region was shifted to lower energies from 531.2 to 530.29 eV, as well as the four contributions.…”

Section: Resultsmentioning

confidence: 99%

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Boosted Photocatalytic Activity of Zn/Al‐Based Layered Double Hydroxides Through Cobalt Incorporation for Phenol Degradation

Portillo‐Vélez,

Velásquez‐Torres,

Pérez‐Hernández

et al. 2024

ChemistrySelect

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Two different hydrotalcites Zn/Al and Zn/Al−Co were prepared for the photodegradation of phenol under UV radiation. These materials were synthesized using the co‐precipitation method and characterized through powder X‐ray diffraction (PXRD), UV‐vis spectroscopy, FTIR spectroscopy, X‐ray photoelectron spectroscopy (XPS) and nitrogen physisorption. The physicochemical characterization results indicated that Zn/Al−Co, which incorporates cobalt atoms, did not affect the hydrotalcite structure (layered double hydroxide). However, the specific area was reduced, and the calcination process favoured the creation of surface defects, consequently increasing the adsorption of oxygen species. The calcined Zn/Al−Co(0.3) hydrotalcite exhibited the highest phenol photocatalytic degradation (68 %) and mineralization (52 %) achieved via a mechanism involving superoxide radicals.

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Section: Detection Of Active Species (⋅Oh ⋅O2− and H+)supporting

confidence: 78%

Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Boosted Photocatalytic Activity of Zn/Al‐Based Layered Double Hydroxides Through Cobalt Incorporation for Phenol Degradation

Portillo‐Vélez,

Velásquez‐Torres,

Pérez‐Hernández

et al. 2024

ChemistrySelect

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show abstract

“…The highest efficiency of removing 4-chlorophenol was demonstrated by Ag/CoFe 2 O 4 material, which after 2 h achieved 90% photooxidation efficiency. High photocatalytic activity toward 4-chlorophenol degradation was demonstrated by Castillo-Rodriguez et al 64 , who synthesized the Zr x O y -Bi 2 O 2 (CO 3 ) composite. This material had a near 95% photodegradation efficiency after 6 h, under UV-C (254 nm) irradiation.…”

Section: Optical Propertiesmentioning

confidence: 99%

Insight into the LED-assisted deposition of platinum nanoparticles on the titania surface: understanding the effect of LEDs

Kubiak

Varma

Sikorski

2022

Sci Rep

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This paper proposes a novel LED-assisted deposition of platinum nanoparticles on the titania surface. For the first time, this process was supported by a UV-LED solution. We used two light sources with different wavelengths (λmax = 365 and 395 nm), and power (P = 1, 5, and 10 W) because the photodeposition process based on LEDs has not been defined. The TiO2–Pt material was discovered to be nano-crystalline anatase particles with nano-platinum particles deposited on the surface of titanium dioxide. Furthermore, the luminescence intensity decreased when Pt was added to TiO2, indicating that charge carrier recombination was reduced. The spectra matching of the photocatalyst and LED reactor was performed for the first time in this work. We proposed a convenient LED reactor that focused light in the range of 350–450 nm, allowing us to effectively use photo-oxidative properties of TiO2–Pt materials in the process of removing 4-chlorophenol. In the presented work, the LED light source plays a dual role. They first induce the platinum photodeposition process, before becoming an important component of tailored photoreactors, which is an important innovative aspect of this research.

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Efficient photodegradation of phenol in wastewater using ZnAl–Bi photocatalysts analysing the effect of Bi content on ZnAl LDH synthesized in one step

Castillo-Rodríguez,

Tzompantzi-Flores,

Marco

et al. 2024

Bull Mater Sci

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High photoactivity of ZrxOy-Bi2O2(CO3) composite materials prepared by one-step synthesis for efficient photodegradation of 4-chlorophenol in water

Cited by 6 publications

References 53 publications

Boosted Photocatalytic Activity of Zn/Al‐Based Layered Double Hydroxides Through Cobalt Incorporation for Phenol Degradation

Boosted Photocatalytic Activity of Zn/Al‐Based Layered Double Hydroxides Through Cobalt Incorporation for Phenol Degradation

Insight into the LED-assisted deposition of platinum nanoparticles on the titania surface: understanding the effect of LEDs

Efficient photodegradation of phenol in wastewater using ZnAl–Bi photocatalysts analysing the effect of Bi content on ZnAl LDH synthesized in one step

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