Full-Spectrum Photocatalytic Activity of ZnO/CuO/ZnFe2O4 Nanocomposite as a PhotoFenton-Like Catalyst

Li, Zhenzhen; Chen, Huabin; Liu, Wenxia

doi:10.3390/catal8110557

Cited by 49 publications

(20 citation statements)

References 35 publications

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“…More specifically, heterogeneous catalysis assisted by irradiation of ultraviolet and visible light as an advanced process of oxidation of recalcitrant and/or persistent organic molecules has become of interest as a potential application of LDHs [15,16]. Several advanced oxidation processes, such as O 3 /Ultraviolet (UV), O 3 /H 2 O 2 , UV/H 2 O 2 , Fenton, UV/Fenton, and UV/TiO 2 , have been applied in wastewater as a treatment to mineralize many organic chemicals [17][18][19][20][21]. Within the persistent molecules that exist, interest in their degradation tends to increase by their toxicity and damage to the environment, as is the case for chlorophenols.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of 2,4,6-Trichlorophenol by MgO–MgFe2O4 Derived from Layered Double Hydroxide Structures

et al. 2019

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In recent years, the search for solutions for the treatment of water pollution by toxic compounds such as phenols and chlorophenols has been increasing. Phenols and their derivatives are widely used in the manufacture of pesticides, insecticides, paper, and wood preservers, among other things. Chlorophenols are partially biodegradable but not directly photodegradable by sunlight and are extremely toxic—especially 2,4,6-trichlorophenol, which is considered to be potentially carcinogenic. As a viable proposal to be applied in the treatment of water contaminated with 2,4,6-trichlorophenol, this paper presents an application study of the thermally activated Mg/Fe layered double hydroxides as photocatalysts for the mineralization of this contaminant. Activated Mg/Fe layered double hydroxides were characterized by X-ray diffraction, thermal analysis, N2 physisorption, and scanning electron microscopy with X-ray dispersive energy. The results of the photocatalytic degradation of 2,4,6-trichlorophenol in aqueous solution showed good photocatalytic activity, with an efficiency of degradation of up to 93% and mineralization of 82%; degradation values which are higher than that of TiO2-P25, which only reached 18% degradation. The degradation capacity is attributed to the structure of the MgO–MgFe2O4 oxides derived from double laminate hydroxide Mg/Fe. A path of degradation based on a mechanism of superoxide and hollow radicals is proposed.

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Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of 2,4,6-Trichlorophenol by MgO–MgFe2O4 Derived from Layered Double Hydroxide Structures

et al. 2019

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“…Figure 6 gives the survey scan of the catalyst confirming the elemental composition of the as-prepared catalyst. The XPS spectra of the Zn 2p and Cu 2p revealed that the binding energies of 1026 and 1048 eV correspond to Zn 2p3/2 and Zn 2p1/2, respectively, and 938 and 945 eV correspond to Cu 2p3/2 and Cu 2p1/2 core levels, respectively [43][44][45]. The binding energies indicate that both copper and zinc are in +2 oxidation state.…”

Section: Xps Analysismentioning

confidence: 98%

Selective Catalytic Oxidation of Toluene to Benzaldehyde: Effect of Aging Time and Calcination Temperature Using CuxZnyO Mixed Metal Oxide Nanoparticles

et al. 2021

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Oxidation is an important organic transformation, and several catalysts have been reported for this conversion. In this study, we report the synthesis of mixed metal oxide CuxZnyO, which is prepared by a coprecipitation method by varying the molar ratio of Cu and Zn in the catalytic system. The prepared mixed metal oxide CuxZnyO was evaluated for catalytic performance for toluene oxidation. Various parameters of the catalytic evaluation were studied in order to ascertain the optimum condition for the best catalytic performance. The results indicate that aging time, calcination temperature, reaction temperature, and feed rate influence catalytic performance. It was found that the catalyst interfaces apparently enhanced catalytic activity for toluene oxidation. The XRD diffractograms reveal the crystalline nature of the mixed metal oxide formed and also confirm the coexistence of hexagonal and monoclinic crystalline phases. The catalyst prepared by aging for 4 h and calcined at 450 °C was found to be the best for the conversion of toluene to benzaldehyde while the reactor temperature was maintained at 250 °C with toluene fed into the reactor at 0.01 mL/min. The catalyst was active for about 13 h.

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“…But the photocatalytic performance of CNU-Naphthoic acid was inferior to that of CNU-SA-2. The double benzene rings doping in the CNU network might result in weaker separation of photogenerated charge carriers (Li et al 2018). Therefore, a single benzene ring was crucial to improve the photocatalytic performance for TC degradation.…”

Section: Photocatalytic Mechanismmentioning

confidence: 99%

“…The photocatalytic activity is consequently enhanced by increasing visible light harvesting and improving charge pair separation. The photocatalytic performance of g-C 3 N 4 could be improved by copolymerizing organic acid (anthroic acid, benzoic acid, and naphthoic acid) with urea due to the fact that the benzenering in the g-C 3 N 4 framework could increase the visible light absorbance (Li et al 2018). Salicylic acid (SA) has a benzene-based structure and was proved to improve photogenerated charge carrier transmission of g-C 3 N 4 nanotubes after the copolymerization with melamine (Jia et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Enhanced visible light-driven photodegradation of tetracycline by salicylic acid-modified graphitic carbon nitride and toxicity assessment

Chen

Lee

et al. 2022

Environ Sci Pollut Res

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The tetracycline (TC) in water has led to serious concern. Graphitic carbon nitride (g-C 3 N 4 ) photocatalysts were produced via copolymerization of mono-benzene ring-mediated precursors (urea, melamine, and dicyandiamide) involving salicylic acid (SA) for TC degradation. The SA-modi ed g-C 3 N 4 samples showed improved visible-light absorbance, transfer and separation of photogenerated electrons, and prospective photocatalytic application in TC degradation. As a result, the optimal SA-modi ed g-C 3 N 4 (2 wt% of SA) using urea (CNU-SA-2) showed 2 times higher TC degradation than that of pristine g-C 3 N 4 .The process of TC degradation was evaluated by the reduction of antibacterial activity and extensively studied by varying the types of TC, initial pH values, co-existing anions, and natural organic materials. In addition, the catalyst could be reused for at least four cycles, indicating good reusability. The main active species were revealed to be h + and •O 2 − by scavenging experiments and electron spin resonance. The CNU-SA-2 photocatalyst and TC intermediates during degradation had no adverse impact on zebra sh embryos. This work could provide a design strategy and a perspective on the practical application of g-C 3 N 4 -based photocatalysts for the treatment of wastewater containing antibiotics.

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Full-Spectrum Photocatalytic Activity of ZnO/CuO/ZnFe2O4 Nanocomposite as a PhotoFenton-Like Catalyst

Cited by 49 publications

References 35 publications

Photocatalytic Degradation of 2,4,6-Trichlorophenol by MgO–MgFe2O4 Derived from Layered Double Hydroxide Structures

Photocatalytic Degradation of 2,4,6-Trichlorophenol by MgO–MgFe2O4 Derived from Layered Double Hydroxide Structures

Selective Catalytic Oxidation of Toluene to Benzaldehyde: Effect of Aging Time and Calcination Temperature Using CuxZnyO Mixed Metal Oxide Nanoparticles

Enhanced visible light-driven photodegradation of tetracycline by salicylic acid-modified graphitic carbon nitride and toxicity assessment

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