Photocatalytic degradation of methylene blue with ZnO@C nanocomposites: Kinetics, mechanism, and the inhibition effect on monoamine oxidase A and B

Yang, Chao; Wang, Xiaoning; Ji, Yujia; Ma, Tao; Zhang, Fen; Wang, Yongqiang; Ci, Miaowei; Chen, Dengtai; Aixia, Jiang; Wang, Weiliang

doi:10.1016/j.impact.2019.100174

Cited by 37 publications

(12 citation statements)

References 57 publications

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“…The C 1s spectrum of ZnO in Figure 4d has three peaks at 284.6 eV, 286.2 eV, and 288.6 eV, as does the standard C 1s spectrum that shows (C-C), (C=O), and (O-C=O) bonds. There is no XPS signal corresponding to the Zn-C bond in the Zn 2p orbital or the C 1s orbital (approximately 281 eV), indicating that carbon is not doped in the ZnO NPs [21,22]. UV-Vis DRS: Figure 5 shows the UV-Vis absorption spectra of the prepared ZnO NPs.…”

Section: Characterization Of Zno Npsmentioning

confidence: 99%

Solvothermal Synthesis of ZnO Nanoparticles for Photocatalytic Degradation of Methyl Orange and p-Nitrophenol

Wang

Yang

Liu

et al. 2021

Water

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The photocatalytic degradation of organic pollutants is an effective method of controlling environmental pollution. ZnO nanoparticles (ZnO NPs) were prepared by the solvothermal method and characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV–visible diffuse reflectance spectroscopy (UV–Vis DRS). The results showed that the ZnO NPs had a uniform size of 25–40 nm, hexagonal wurtzite structure, and a band gap of 2.99 eV. The photocatalytic degradation of methyl orange (MO) and p-nitrophenol (PNP) was used as a model reaction to evaluate the photocatalytic activity of ZnO NPs. The photocatalytic degradation rates (pseudo-first-order kinetics) of MO and PNP were 92% (0.0128 min−1) and 56.2% (0.0042 min−1), respectively, with a 25 W ultraviolet lamp, MO/PNP concentration = 20 mg/L, ZnO NPs dose = 1.5 g/L, and time = 180 min. The photocatalytic mechanism of ZnO NPs and degradation pathways of MO and PNP were also proposed. The results provide valuable information and guidance for the treatment of wastewater via photocatalytic methods.

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Section: Characterization Of Zno Npsmentioning

confidence: 99%

Solvothermal Synthesis of ZnO Nanoparticles for Photocatalytic Degradation of Methyl Orange and p-Nitrophenol

Wang

Yang

Liu

et al. 2021

Water

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“…For instance, there is a scarcity of data about the incorporation of carbon sources to Zn materials to reduce the cost and to increase the efficiency of the electrocatalysts in the CO 2 RR application. Just a few studies for the preparation of Zn–C-based materials were reported, but for supercapacitors , and photocatalysis , applications. In the case of the CO 2 RR, some examples of the preparation of reduced graphene oxide (rGO)-based catalysts were described but using expensive sources such as Cu, Au, nickel (Ni), Ag, cobalt (Co)-porphyrin, and iron (Fe)-porphyrin materials .…”

Section: Introductionmentioning

confidence: 99%

Biochar/Zinc Oxide Composites as Effective Catalysts for Electrochemical CO₂Reduction

Lourenço

Zeng

Jagdale

et al. 2021

ACS Sustainable Chem. Eng.

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Novel electrocatalysts based on zinc oxide (ZnO) and biochars are prepared through a simple and scalable route and are proposed for the electrocatalytic reduction of CO2 (CO2RR). Materials with different weight ratios of ZnO to biochars, namely, pyrolyzed chitosan (CTO) and pyrolyzed brewed waste coffee (CBC), are synthesized and thoroughly characterized. The physicochemical properties of the materials are correlated with the CO2RR to CO performance in a comprehensive study. Both the type and weight percentage of biochar significantly influence the catalytic performance of the composite. CTO, which has pyridinic- and pyridone-N species in its structure, outperforms CBC as a carbon matrix for ZnO particles, as evidenced by a higher CO selectivity and an enhanced current density at the ZnO_CTO electrode under the same conditions. The study on various ZnO to CTO weight ratios shows that the composite with 40.6 wt % of biochar shows the best performance, with the CO selectivity peaked at 85.8% at −1.1 V versus the reversible hydrogen electrode (RHE) and a CO partial current density of 75.6 mA cm–2 at −1.3 V versus RHE. It also demonstrates good stability during the long-term CO2 electrolysis, showing high retention in both CO selectivity and electrode activity.

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“…SDZ was adsorbed to the surface of PMBC@TiO 2 by microporous capture, electrostatic interactions, hydrogen-bond interactions, and π–π interactions . The conjugated structure and oxygen-containing functional groups of PMBC were beneficial to the separation efficiency of hole–electron pair and generation of ROS. , Therefore, PMBC@TiO 2 showed a higher removal rate of SDZ than either PMBC or TiO 2 .…”

Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Phosphoric Acid-Modified Biochar Nanomaterials with Highly Efficient Adsorption and Photodegradation Ability

Yang

Zhu²,

Dong

et al. 2021

Langmuir

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Phosphoric acid-modified biochar (PMBC) was prepared using biochar (BC) as the carbon source and phosphoric acid as the activating agent. The PMBC exhibited an ordered vessel structure after deashing treatment, but the sidewalls became much rougher, the polarity (O/C atomic ratio of BC = 0.2320 and O/C atomic ratio of PMBC = 0.1604) decreased, and the isoelectric points (PI of BC = 5.22 and PI of PMBC = 5.51) and specific surface area (SSA of BC = 55.322 m 2 /g and SSA of PMBC = 62.285 m 2 /g) increased. The adsorption characterization of the removal of sulfadiazine (SDZ) from PMBC was studied. The adsorption of SDZ by PMBC was in accordance with the Langmuir isotherm model and the pseudo-second-order kinetics model, and the adsorption thermodynamics were shown as Gibbs free energy < 0, an enthalpy change of 19.157 kJ/mol, and an entropy change of 0.0718 kJ/(K•mol). The adsorption of SDZ by PMBC was a complicated monolayer adsorption that was spontaneous, irreversible, and endothermic, and physical adsorption and chemical adsorption occurred simultaneously. The adsorption process was controlled by microporous capture, electrostatic interactions, hydrogen-bond interactions, and π−π interactions. PMBC@TiO 2 photocatalysts with different mass ratios between TiO 2 and PMBC were prepared via the in situ sol−gel method. PMBC@TiO 2 exhibited both an ordered vessel structure (PMBC) and irregular particles (TiO 2 ), and it was linked via Ti−O−C bonds. The optimal mass ratio between TiO 2 and PMBC was 3:1. The removal of SDZ via PMBC@TiO 2 was dependent on the coupling of adsorption and photocatalysis. The PMBC-enhanced photocatalytic performance of PMBC@TiO 2 resulted in a higher absorption of UV and visible light, greater generation of reactive oxygen species, high levels of adsorption of SDZ on PMBC, and the conjugated structure and oxygen-containing functional groups that promoted the separation efficiency of the hole−electron pairs.

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Photocatalytic degradation of methylene blue with ZnO@C nanocomposites: Kinetics, mechanism, and the inhibition effect on monoamine oxidase A and B

Cited by 37 publications

References 57 publications

Solvothermal Synthesis of ZnO Nanoparticles for Photocatalytic Degradation of Methyl Orange and p-Nitrophenol

Solvothermal Synthesis of ZnO Nanoparticles for Photocatalytic Degradation of Methyl Orange and p-Nitrophenol

Biochar/Zinc Oxide Composites as Effective Catalysts for Electrochemical CO₂Reduction

Preparation and Characterization of Phosphoric Acid-Modified Biochar Nanomaterials with Highly Efficient Adsorption and Photodegradation Ability

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Photocatalytic degradation of methylene blue with ZnO@C nanocomposites: Kinetics, mechanism, and the inhibition effect on monoamine oxidase A and B

Cited by 37 publications

References 57 publications

Solvothermal Synthesis of ZnO Nanoparticles for Photocatalytic Degradation of Methyl Orange and p-Nitrophenol

Solvothermal Synthesis of ZnO Nanoparticles for Photocatalytic Degradation of Methyl Orange and p-Nitrophenol

Biochar/Zinc Oxide Composites as Effective Catalysts for Electrochemical CO2Reduction

Preparation and Characterization of Phosphoric Acid-Modified Biochar Nanomaterials with Highly Efficient Adsorption and Photodegradation Ability

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Biochar/Zinc Oxide Composites as Effective Catalysts for Electrochemical CO₂Reduction