Preparation, characterization and catalytic activity of a novel mesoporous nanocrystalline MgO nanoparticle for ozonation of acetaminophen as an emerging water contaminant

Mashayekh-Salehi, Ali; Moussavi, Gholamreza; Yaghmaeian, Kamyar

doi:10.1016/j.cej.2016.10.096

Cited by 152 publications

(69 citation statements)

References 74 publications

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“…In a similar vein, a Fe‐Cu‐KOH catalyst supported on walnut shell activated carbon prepared by a sol‐gel method was more active when the surface area was higher, regardless of acidic site density or thermal stability . Acetaminophen was oxidized by ozone over a high surface area modified MgO at a higher rate compared to a non‐modified MgO . Xu et al reported that plasma‐engraved Co 3 O 4 had two times higher SSA than the pristine form, resulting in 10 times higher activity in oxygen evolution reaction.…”

Section: Applicationsmentioning

confidence: 99%

“…[50] Acetaminophen was oxidized by ozone over a high surface area modified MgO at a higher rate compared to a non-modified MgO. [51] Xu et al [52] reported that plasma-engraved Co 3 O 4 had two times higher SSA than the pristine form, resulting in 10 times higher activity in oxygen evolution reaction. Afshar-Taromi and Kaliaguine [18] investigated the effect of calcination time and temperature, along with that of the mass ratio of Pluronic 123 /Al(O-i-Pr) 3 , to identify optimal conditions to synthesize mesostructured γ-alumina as a catalyst support.…”

Section: H3 H4mentioning

confidence: 99%

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Experimental methods in chemical engineering: specific surface area and pore size distribution measurements—BET, BJH, and DFT

2019

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Gas physisorption is an experimental technique based on equilibrium Van der Waals interactions between gas molecules and solid particles, that quantifies the specific surface area (SSA), pore size distribution (PSD), and pore volume of solids and powders. The performance of catalysts, absorbents, chromatography column materials, and polymer resins depends on these morphological properties. Here we introduce the basic principles and procedures of physical adsorption, especially nitrogen physisorption, as a guide to students and researchers unfamiliar with the field. The Brunauer‐Emmett‐Teller theory (BET) is a common approach to estimate SSA that extends the Langmuir monolayer molecular adsorption model to multilayer layers. It relies on an equilibrium adsorption isotherm, measured at the normal boiling point of the adsorbate, eg, 77 K or 87 K for N2 and Ar, respectively. Web of Science indexed 45 400 articles in 2016 and 2017 that mentioned N2 adsorption porosimetry—BET and BJH (Barrett‐Joyner‐Halenda) keywords. The VOSViewer bibliometric tool grouped these articles into four research clusters: adsorption, activated carbon in aqueous solutions for removal of heavy metal ions; synthesis of nanoparticles and composites; catalysts performance in oxidation and reduction processes; and photocatalytic degradation with TiO2. According to the literature, the accuracy of the density function theory (DFT) method is higher than with the BJH theory and it is more reliable.

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Section: Applicationsmentioning

confidence: 99%

Section: H3 H4mentioning

confidence: 99%

Experimental methods in chemical engineering: specific surface area and pore size distribution measurements—BET, BJH, and DFT

2019

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“…Lewis acid sites are considered to be catalytic centers on the catalyst surface for ozone decomposition reactions [32,61]. On the other hand, PHOS has high affinity toward the Lewis acids and thus can fill the active sites on the surface of catalysts, leading to a loss of catalytic activity.…”

Section: Radical Species and Reaction Mechanismmentioning

confidence: 99%

Treatment of aqueous solutions of 1,4-dioxane by ozonation and catalytic ozonation with copper oxide (CuO)

Scaratti

Basso

Landers

et al. 2018

Environmental Technology

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In this study, treatment for the removal of 1,4-dioxane by ozone and by catalytic ozonation using CuO as the catalyst was investigated. While the removal of 1,4-dioxane was small (20%) and mineralization negligible after 6 h of ozonation treatment, the removals of 1,4-dioxane and total organic carbon increased by factors of 10.35 and 81.25, respectively, after catalytic ozonation in the presence of CuO. The mineralization during catalytic ozonation was favored at pH 10 (94.91 min -1 ), although it proceeded even at pH 3 (54.41 min -1 ). The CuO catalyst decreased the equilibrium concentration of soluble ozone and favored its decomposition to reactive oxidative species. Radical scavenging experiments demonstrated that superoxide radicals were the main species responsible for the degradation of 1,4-dioxane. Further scavenging experiments with phosphate confirmed the presence of Lewis active sites on the surface of CuO, which were responsible for the adsorption and decomposition of ozone. The reaction mechanism proceeded through the formation of ethylene glycol diformate, which quickly hydrolyzed to ethylene glycol and formic acid as intermediate products. The stability of CuO indicated weak copper leaching and high catalytic activity for five recycling cycles. The toxicity of the water, assessed by Vibrio fischeri bioluminescence assays, remained the same (low toxicity) after catalytic ozonation while it increased after treatment with ozonation alone.

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“…As a nontoxic, economical, and environment‐friendly material, nano‐MgO has been used as catalyst, bactericide as well as adsorption and defluoridation agent . In the past decade, MgO was used to catalyze O 3 for the degradation of toluene in air and organic pollutants in water . In addition, nano‐MgO by itself exhibits good bactericidal activity in aqueous environments, and is known to inactivate Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ) .…”

Section: Introductionmentioning

confidence: 99%

“…[13][14][15] In the past decade, MgO was used to catalyze O 3 for the degradation of toluene in air and organic pollutants in water. [16][17][18] In addition, nano-MgO by itself exhibits good bactericidal activity in aqueous environments, and is known to inactivate Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). 19,20 It is envisaged that mechanistically MgO is bifunctional as far as ozonation disinfection is concerned.…”

Section: Introductionmentioning

confidence: 99%

Ozonation inactivation of Escherichia coli in aqueous solution over MgO nanocrystals: modelling and mechanism

Yang

et al. 2018

J of Chemical Tech & Biotech

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BACKGROUND This study aims to reveal the potential of using heterogeneous catalytic ozonation processes (HCOP) in water disinfection and provide a direction to tailor the catalytic activity by crystal facet engineering. Four kinds of MgO nanocrystals individually with exposure of (111), (200), (110) and (100) facets were prepared and used. RESULTS It is found that MgO functions as a bactericide as well as a catalyst for ozonation. The catalytic activity of MgO nanocrystals decreases in the order MgO(111) > MgO(200) > MgO(110) > MgO(100). The apparent first‐order inactivation rate (kap) fitted by the Hom model of MgO(111)/O3 is 2.56 min‐1, which is 32.0 and 3.5 times that of single ozonation and classic MgO(100)/O3. It is confirmed by scavenger studies that •OH mainly works in MgO(111)/O3 while more direct ozonation occurs in other cases. Some O2•− are also detected in the presence of MgO. With the attack of these reactive oxidation species, cell membranes were damaged and intracellular components were released, leading to the death of Escherichia coli. CONCLUSION These results indicate that HCOP is a promising technology for water disinfection, and crystal facet engineering is an effective strategy to enhance the catalytic performance. © 2017 Society of Chemical Industry

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Preparation, characterization and catalytic activity of a novel mesoporous nanocrystalline MgO nanoparticle for ozonation of acetaminophen as an emerging water contaminant

Cited by 152 publications

References 74 publications

Experimental methods in chemical engineering: specific surface area and pore size distribution measurements—BET, BJH, and DFT

Experimental methods in chemical engineering: specific surface area and pore size distribution measurements—BET, BJH, and DFT

Treatment of aqueous solutions of 1,4-dioxane by ozonation and catalytic ozonation with copper oxide (CuO)

Ozonation inactivation of Escherichia coli in aqueous solution over MgO nanocrystals: modelling and mechanism

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