Photodegradation of phenol using reconstructed Ce doped Zn/Al layered double hydroxides as photocatalysts

Suárez-Quezada, M.; Romero-Ortiz, Guadalupe; Suárez, Víctor; Morales-Mendoza, Getsemani; Lartundo-Rojas, L.; Navarro-Cerón, Elizabeth; Tzompantzi, Francisco; Robles, Salvador Aguirre; Gómez, R.; Mantilla, A.

doi:10.1016/j.cattod.2016.01.009

Cited by 58 publications

(21 citation statements)

References 38 publications

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“…At periodic time intervals, 5 mL aliquots were sampled and ultimately centrifuged to extract particles. The percentage degradation of the dye was calculated via the following equation:Where C 0 is initial absorbance of the dry solution before degradation, and C t is absorbance of the dye solution at time t 10 .…”

Section: Methodsmentioning

confidence: 99%

“…Transition metal oxide semiconductors (TMOs) 1 , 2 are viable materials due their electronic band structures, physical properties and stability in demanding chemical environments, and therefore have been used in different applications such as gas sensors, resonators and high-efficiency catalysts 3 – 6 . TMOs, such as TiO 2 , WO 3 , MoO 3 and CeO 2 , are photocatalysts 7 – 9 and decompose organic pollutant, such as phenol 10 , methyl orange 11 , rhodamine B 12 and methylene 13 MoO 3 is a n-type semiconductor and exists in three main crystal structures: orthorhombic (α-MoO 3 ), monoclinic (β-MoO 3 ) and hexagonal (h-MoO 3 ) 14 – 16 . Particularly, α-MoO 3 has been considered as a potential photocatalyst material in terms of its anisotropic layered structure 17 , where highly asymmetrical [MoO 6 ] octahedrons assemble into a bilayer in such a manner that certain octahedrons share four corners to form a plane, further combining with another plane by sharing octahedral edges along the [001] direction and all the bilayers stack up along the [010] direction with weak van der Waals forces 18 – 20 .…”

Section: Introductionmentioning

confidence: 99%

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Novel Fabrication and Enhanced Photocatalytic MB Degradation of Hierarchical Porous Monoliths of MoO3 Nanoplates

Liu

Feng

Wang

et al. 2017

Sci Rep

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Porous monoliths of MoO3 nanoplates were synthesized from ammonium molybdate (AHM) by freeze-casting and subsequent thermal treatment from 300 to 600 °C. Pure orthorhombic MoO3 phase was obtained at thermal treatment temperature of 400 °C and above. MoO3 monoliths thermally treated at 400 °C displayed bimodal pore structure, including large pore channels replicating the ice crystals and small pores from MoO3 sheets stacking. Transmission electron microscopy (TEM) images revealed that the average thicknesses of MoO3 sheet were 50 and 300 nm in porous monoliths thermally treated at 400 °C. The photocatalytic performance of MoO3 was evaluated through degradation of methylene blue (MB) under visible light radiation and MoO3 synthesized at 400 °C exhibited strong adsorption performance and best photocatalytic activity for photodegradation of MB of 99.7% under visible illumination for 60 min. MoO3 photocatalyst displayed promising cyclic performance, and the decolorization efficiency of MB solution was 98.1% after four cycles.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Novel Fabrication and Enhanced Photocatalytic MB Degradation of Hierarchical Porous Monoliths of MoO3 Nanoplates

Liu

Feng

Wang

et al. 2017

Sci Rep

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“…Herein, attention is given to specific LDH compositions focusing on the most recent literature. Zn and Al are recurrent elements in the photocatalytic HT clays formulation [128][129][130][131][132][133][134][135]. Many works report that pristine LDHs can be very efficient without any further treatment, such as calcination, providing decoloration percentage of 90% for solutions of methylene blue (MB) after 1 h irradiation time (better than that of commercial ZnO nanoparticles) [128].…”

Section: Organic Molecules Degradationmentioning

confidence: 99%

“…Many works report that pristine LDHs can be very efficient without any further treatment, such as calcination, providing decoloration percentage of 90% for solutions of methylene blue (MB) after 1 h irradiation time (better than that of commercial ZnO nanoparticles) [128]. In order to improve the photodegradation performance, additives can be included in the LDH-lattice; cerium doping appeared an interesting option to be considered, as it provided an efficiency 1.5 times higher than pure ZnAl LDH [131] (see Figure 7). A proposed operation mechanism considers Ce 4+ cations able to: i) Collect e − photogenerated by the LDH lattice; ii) convert to *Ce 3+ ; and iii) transfer the excitation energy (and electron) to an O 2 adsorbed molecule.…”

Section: Organic Molecules Degradationmentioning

confidence: 99%

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Layered Double Hydroxides: A Toolbox for Chemistry and Biology

et al. 2019

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Layered double hydroxides (LDHs) are an emergent class of biocompatible inorganic lamellar nanomaterials that have attracted significant research interest owing to their high surface-to-volume ratio, the capability to accumulate specific molecules, and the timely release to targets. Their unique properties have been employed for applications in organic catalysis, photocatalysis, sensors, drug delivery, and cell biology. Given the widespread contemporary interest in these topics, time-to-time it urges to review the recent progresses. This review aims to summarize the most recent cutting-edge reports appearing in the last years. It firstly focuses on the application of LDHs as catalysts in relevant chemical reactions and as photocatalysts for organic molecule degradation, water splitting reaction, CO2 conversion, and reduction. Subsequently, the emerging role of these materials in biological applications is discussed, specifically focusing on their use as biosensors, DNA, RNA, and drug delivery, finally elucidating their suitability as contrast agents and for cellular differentiation. Concluding remarks and future prospects deal with future applications of LDHs, encouraging researches in better understanding the fundamental mechanisms involved in catalytic and photocatalytic processes, and the molecular pathways that are activated by the interaction of LDHs with cells in terms of both uptake mechanisms and nanotoxicology effects.

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Layered double hydroxide‐based photocatalytic materials toward renewable solar fuels production

Bian

Zhang

Zhao

et al. 2021

InfoMat

127

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Photocatalysis is an ideal and promising green technology to drive numerous chemical reactions for valued chemicals production under very mild conditions, thereby providing solutions to global energy and environment issues related to burning fossil fuels. Over the past decade, layered double hydroxides (LDHs), as the members in two‐dimensional materials family, have attracted much attention due to their many advantages in photocatalysis, such as facile synthesis, low cost and powerful tunability of composition. In this review, we provide a synthetic overview of recent research advances of LDH‐based photocatalysts, with the main discussion of the design strategies to improve their photocatalytic performance, including component control, defect engineering, hybridization, and topological transformation. Structure‐performance correlations and tailor‐made material synthesis strategies are elaborated to discuss how to realize high‐performance LDH‐based photocatalysts for three important reactions (i.e., water splitting, CO2 conversion, and N2 reduction) to generate desirable solar fuels. Further, the remaining challenges and future perspectives of LDH‐based photocatalysts are summed up, aiming to inspire brand new solutions for pushing forward the development of LDH‐based photocatalysis.

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Photodegradation of phenol using reconstructed Ce doped Zn/Al layered double hydroxides as photocatalysts

Cited by 58 publications

References 38 publications

Novel Fabrication and Enhanced Photocatalytic MB Degradation of Hierarchical Porous Monoliths of MoO3 Nanoplates

Novel Fabrication and Enhanced Photocatalytic MB Degradation of Hierarchical Porous Monoliths of MoO3 Nanoplates

Layered Double Hydroxides: A Toolbox for Chemistry and Biology

Layered double hydroxide‐based photocatalytic materials toward renewable solar fuels production

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