Construction of rGO wrapping Cu2O/ZnO heterostructure photocatalyst for PNP and PAM degradation

Liu, Fang; Che, Yangli; Chai, Qingwen; Zhao, Mengfei; Lv, Yan; Sun, Hui; Wang, Yongqiang; Sun, Juan; Zhao, Chaocheng

doi:10.1007/s11356-019-05814-7

Cited by 21 publications

(7 citation statements)

References 74 publications

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“…The percentage of photocatalytic degradation ( D %) and rate of reaction were evaluated using eqs 1 and 2 , respectively. 11 , 50 where k represents rate constant, and C 0 and C t are the dye (pollutant) concentrations before (or at time = 0 min) and after illumination (or at time = t min), respectively.…”

Section: Methodsmentioning

confidence: 99%

Green Synthesis of a CuO–ZnO Nanocomposite for Efficient Photodegradation of Methylene Blue and Reduction of 4-Nitrophenol

et al. 2022

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CuO–ZnO nanocomposites (NCs) were synthesized using an aqueous extract of Verbascum sinaiticum Benth. (GH) plant. X-ray diffraction (XRD), spectroscopic, and microscopic methods were used to explore the crystallinity, optical properties, morphology, and other features of the CuO–ZnO samples. Furthermore, catalytic performances were investigated for methylene blue (MB) degradation and 4-nitrophenol (4-NP) reduction. According to the results, CuO–ZnO NCs with 20 wt % CuO showed enhanced photocatalytic activity against MB dye with a 0.017 min –1 rate constant compared to 0.0027 min –1 for ZnO nanoparticles (NPs). Similarly, a ratio constant of 5.925 min –1 g –1 4-NP reductions was achieved with CuO–ZnO NCs. The results signified enhanced performance of CuO–ZnO NCs relative to ZnO NPs. The enhancement could be due to the synergy between ZnO and CuO, resulting in improved absorption of visible light and reduced electron–hole (e – /h + ) recombination rate. In addition, variations in the CuO content affected the performance of the CuO–ZnO NCs. Thus, the CuO–ZnO NCs prepared using V. sinaiticum Benth. extract could make the material a desirable catalyst for the elimination of organic pollutants.

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Section: Methodsmentioning

confidence: 99%

Green Synthesis of a CuO–ZnO Nanocomposite for Efficient Photodegradation of Methylene Blue and Reduction of 4-Nitrophenol

et al. 2022

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“…Fan et al 46 synthesized Cu 2 O nanoparticles which showed 95% photo‐degradation efficiency and a rate constant of 0.0331 min −1 for a 4.8 mmol PNP (660 mg/L) in water in the presence of UV light with 1.1 wt% H 2 O 2 . Liu et al 47 showed 98% degradation efficiency of 10 mg/L PNP in 90 min by reduced graphene oxide (RGO, 10%) loaded copper oxide‐zinc oxide nano‐composite under simulated solar light with an apparent 1st order rate constant of 0.0331 min −1 . From these comparative results it is evident that the present ION filled PMNC showed excellent photocatalytic degradation even in the absence of any reducing or oxidizing agents.…”

Section: Resultsmentioning

confidence: 99%

“…In contrast, there is no measurable photocatalytic degradation of the PNP solution of same concentration under similar condition with the unfilled CP polymer containing 0% ION as observed in Figure 9B which indicates that the IONs present in the polymer is responsible for the photocatalytic degradation of PNP. Wang et al 44 47 showed 98% degradation efficiency of 10 mg/L PNP in 90 min by reduced graphene oxide (RGO, 10%) loaded copper oxide-zinc oxide nanocomposite under simulated solar light with an apparent 1st order rate constant of 0.0331 min À1 . From these comparative results it is evident that the present ION filled PMNC showed excellent photocatalytic degradation even in the absence of any reducing or oxidizing agents.…”

Section: Recyclability Of the Adsorbentmentioning

confidence: 99%

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Synthesis of iron oxide nanoparticles encapsulated poly(styrene‐co‐4‐vinyl pyridine) nanocomposites for column adsorption and photocatalytic degradation of para nitrophenol from water

Datta,

Ray

2023

Polymer Engineering & Sci

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Styrene (St), 1,4 vinyl pyridine (4VP) monomers and divinyl benzene (DVB) monomer‐cum‐crosslinker at different molar ratios were subjected to emulsion polymerization in the presence of FeCl2, 6H2O/FeCl3⋅4H2O followed by the treatment with an aqueous ammonia solution to produce several iron oxide nanoparticles (IONs) impregnated crosslinked copolymer composites. The resulting polymer metal nanocomposites (PMNCs) were characterized by FTIR, proton and 13C NMR, UV–visible spectroscopy, XRD, XPS, DLS, magnetic properties, SEM and TEM. The PMNCs were used for batch and column adsorption and photocatalytic degradation of p‐nitrophenol (PNP) from water. The PMNC4 composite prepared with an styrene:4VP molar ratio of 5:1 (16.7 mol% 4VP), 4 wt.% DVB crosslinker and 0.025/0.05 molar ratios of Fe(II)/Fe(III) salts leads to an optimum batch equilibrium adsorption (qe, mg/g)/removal% of 496.36/99.3 PNP from aqueous PNP of concentration 100 mg/L. The same composite showed an equilibrium PNP adsorption (qe) of 114.2 mg/g polymer and a removal% of 26.8 for an inlet feed concentration (Ci, mg/L)/flow rate (Qt, mL/min)/bed height (h, mm) of 100/30/30 in a fixed bed. The PMNC4 polymer showed a photodegradation efficiency of 98% with a 1st order rate constant of 0.029 min−1 after 70 min of degradation of 100 mg/L PNP in solar light.Highlights Copolymer network of styrene, 4 vinyl pyridine and DVB were synthesized. Iron oxide nanoparticles were introduced into the network in‐situ during synthesis. The metal polymer nanocomposites (PMNCs) were characterized. Synthesis parameters were optimized with respect to batch adsorption of PNP. PMNCs showed excellent fixed bed adsorption and photocatalytic degradation of PNP.

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“…The photodegradation efficiency was calculated using eq normald normale normalg normalr normala normald normala normalt normali normalo normaln ( % ) = C 0 − C t C 0 × 100 % where C 0 and C t represent the dye concentrations at irradiation time of t = 0 and t = t , respectively. Moreover, the photocatalytic dye degradation kinetics was also studied by employing the pseudo-first-order kinetic model, and the rate of photodegradation was determined using the following formula ln ( C t C 0 ) = − k t where C 0 and C t stand for the dye concentrations at irradiation time of t = 0 and t = t , respectively, and k is the apparent reaction rate constant.…”

Section: Methodsmentioning

confidence: 99%

Croton macrostachyus Leaf Extract-Mediated Green Synthesis of ZnO Nanoparticles and ZnO/CuO Nanocomposites for the Enhanced Photodegradation of Methylene Blue Dye with the COMSOL Simulation Model

Endeshaw,

Tufa,

Goddati

et al. 2023

ACS Omega

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The photodegradation of organic pollutants using metal oxidebased catalysts has drawn great attention as an effective method for wastewater treatment. In this study, zinc oxide nanoparticles (ZnO NPs) and zinc oxide/ copper oxide nanocomposites (ZnO/CuO NCs) were fabricated using the leaf extract of Croton macrostachyus as a nontoxic, natural reducing and stabilizing agent. The synthesized samples were characterized by employing X-ray diffraction, microscopic, spectroscopic, and electrochemical methods. The results confirmed the successful synthesis of ZnO NPs and ZnO/CuO NCs with well-defined crystalline structures and morphologies. The prepared samples were tested for the photodegradation of methylene blue (MB) dye under visible light irradiation. Compared to ZnO NPs, ZnO/CuO NCs showed greatly improved photocatalytic performances, particularly with the sample prepared with the 20 mol % Cu precursor (97.02%). The enhancement could be related to the formed p−n heterojunction, which can suppress the recombination of charge carriers and extend the photoresponsive range. A theoretical study of the photocatalytic activity of ZnO/CuO NCs against MB dye degradation was also conducted by using COMSOL Multiphysics software. The results of the simulation are in reasonable agreement with those of the experiment. This study contributes to the development of sustainable and effective photocatalytic materials that are suitable for application in environmental remediation, particularly in the treatment of wastewater.

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Construction of rGO wrapping Cu2O/ZnO heterostructure photocatalyst for PNP and PAM degradation

Cited by 21 publications

References 74 publications

Green Synthesis of a CuO–ZnO Nanocomposite for Efficient Photodegradation of Methylene Blue and Reduction of 4-Nitrophenol

Green Synthesis of a CuO–ZnO Nanocomposite for Efficient Photodegradation of Methylene Blue and Reduction of 4-Nitrophenol

Synthesis of iron oxide nanoparticles encapsulated poly(styrene‐co‐4‐vinyl pyridine) nanocomposites for column adsorption and photocatalytic degradation of para nitrophenol from water

Croton macrostachyus Leaf Extract-Mediated Green Synthesis of ZnO Nanoparticles and ZnO/CuO Nanocomposites for the Enhanced Photodegradation of Methylene Blue Dye with the COMSOL Simulation Model

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