Fabrication of MCC/Cu2O/GO composite foam with high photocatalytic degradation ability toward methylene blue

Nie, Jing; Li, Chenyu; Jin, Ze-yuan; Hu, Wenting; Wang, Jiahao; Huang, Ting; Wang, Yong

doi:10.1016/j.carbpol.2019.115101

Cited by 24 publications

(11 citation statements)

References 67 publications

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“…As shown in Figure 2d, the typical graphite powder peak disappeared at 2θ = 26.7°, but a typical GO peak appeared at 2θ = 10.1°, confirming that the GO has been successfully synthesized. 33 After introducing N-phenylthiourea into GO, the peak at 2θ = 10.1°was red-shifted to 9.94°, and the peak intensity was significantly reduced. It was proved that Nphenylthiourea successfully functionalized GO.…”

Section: Resultsmentioning

confidence: 98%

Novel Adsorbent of N-Phenylthiourea-Functionalized Graphene Oxide and Its Removal of Methyl Orange in Aqueous Solutions

Lü

Zhang

et al. 2020

J. Chem. Eng. Data

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In this paper, an N-phenylthiourea-functionalized graphene oxide (GO-NPT) composite was prepared by a condensation reaction of graphene oxide (GO) and N-phenylthiourea. This composite was characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray diffraction, ultraviolet−visible spectroscopy, thermogravimetric analysis, the Brunauer−Emmett−Teller method, and zeta potential measurements. By exploring the effects of pH, time, temperature, salt ion solubility, and initial methyl orange (MO) concentration on adsorption, we have found the optimal conditions for adsorption. In addition, the adsorption mechanism was explored by adsorption kinetics, adsorption isotherms, and adsorption thermodynamics. After the tests, we found that GO-NPT has excellent reusability. Compared to the parent material GO (adsorption capacity of 63.84 mg/g), the adsorption capacity of GO-NPT for MO was 141.467 mg/g. Therefore, we believe that GO-NPT is a very promising adsorbent.

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Section: Resultsmentioning

confidence: 98%

Novel Adsorbent of N-Phenylthiourea-Functionalized Graphene Oxide and Its Removal of Methyl Orange in Aqueous Solutions

Lü

Zhang

et al. 2020

J. Chem. Eng. Data

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“…21 Notably, Cu 2 O−30% RGO composite possesses a large S BET of 43.701 m 2 /g, which is larger than those of the previously reported materials. 30,33,57,58 Consequently, the Cu 2 O−30% RGO composite is highly efficient for the photocatalytic degradation and removal of MB from aqueous systems.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…28 To exploit these advantages, a heterostructure composite comprising Cu 2 O enfolded by RGO (Cu 2 O−RGO) has been developed, where RGO with a large surface area not only assists in the adsorption of methylene blue (MB) but also separates the photogenerated charge carriers and prevents surface recombination of the photogenerated e − −h + pairs in Cu 2 O. 28,30 Indeed, the combination of Cu 2 O and RGO has been utilized as a photocatalytic material for the degradation of organic dyes. 30,32−35 However, the photocatalytic efficiency of the Cu 2 O/RGO composite is not particularly high, and long irradiation times are required to enhance its photocatalytic efficiency.…”

Section: ■ Introductionmentioning

confidence: 99%

Reduced Graphene Oxide-Supported Copper(I) Oxide Composites for the Degradation of Methylene Blue: Exploring the Capacity of RGO as an Electron Capturer for Achieving Highly Stable Photocatalytic Activity

Vo,

Nguyen,

Bark

2024

ACS Appl. Electron. Mater.

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Reduced graphene oxide (RGO)-modified copper(I) oxide (Cu2O–RGO) is a high-performance composite and a low-cost photocatalyst for methylene blue (MB) degradation. To evaluate the effect of RGO on the photocatalytic performances of Cu2O–x% RGO composites (where x is the loading amount of RGO) in MB degradation, Cu2O was separately loaded with 10, 20, and 30 wt % RGO via a precipitation method. We synthesized a Cu2O–30% RGO composite with a superior surface area (S BET) of 43.701 m2/g, which provided a large active area for MB photodegradation. Cu2O–30% RGO composite was significantly more effective as a catalyst than bare Cu2O for MB photodegradation, as it degraded 99.2% MB in only 30 min under visible-light irradiation without oxidation agents as compared to the case of bare Cu2O (17.5% MB degradation). Notably, the Cu2O–30% RGO composite afforded the largest rate constant of 0.10193 L/min under visible-light irradiation, which was twice that of the Cu2O–30% RGO composite without irradiation (0.0561 L/min). Electron (e–) capture efficacy of RGO in suppressing electron (e–)–hole (h+) pairs recombination was demonstrated, and a plausible mechanism was proposed to rationalize the high photocatalytic efficiency of Cu2O–30% RGO. The RGO in Cu2O–RGO composites played crucial roles, narrowing the band gap, extending the lifetime, and substantially enhancing the photocatalytic activity of Cu2O. Durability and reusability of the catalysts were also examined, and MB degradation by the Cu2O–30% RGO composite was maintained at 95% in the second decolorization cycle followed by a decline to 87% in the fifth decolorization cycle, rendering the Cu2O–30% RGO composite appropriate for use in real-time environmental applications. This study provides an effective photocatalyst for the degradation of organic pollutants in wastewater and suggests its potential for future applications in related fields. Furthermore, herein, the role of RGO as an electron capturer in Cu2O–RGO composites for MB degradation under visible-light irradiation is comprehensively analyzed for the first time.

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“…The harm of organic dye wastewater to environmental pollution is very serious because organic dye pollutants contain aromatic molecular structures, which makes them difficult to degrade 1 . Currently, various methods have been developed for the removal of organic dye pollutants, including membrane separation, 2 adsorption, 3 chemical oxidation, 4 and photocatalytic degradation 5 . Among them, adsorption method has become the main method for dye wastewater treatment due to its advantages of simple operation, small footprint, and good effect.…”

Section: Introductionmentioning

confidence: 99%

Preparation and properties of poly(lactic acid)/g‐titanium dioxide electrospinning membranes based on thiol‐ene click chemistry

Shao

Zhen

Chen³

2022

Polymers for Advanced Techs

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The g‐titania functional additives were prepared via thiol‐ene click chemical reaction, and then the polylactic acid/g‐titania nanofiber membrane was prepared via electrospinning technology. Characterization via scanning electron microscopy and nitrogen adsorption/desorption showed that the average fiber diameter of the TP4 fiber membrane was 489 nm, the specific surface area was 34.69 m2·g−1, and the average pore size was 22.31 nm. The adsorption mechanism, photocatalytic degradation performance, and reusability of polylactic acid/g‐titania nanofibrous membranes were characterized. The results showed that the adsorption of methylene blue by TP4 nanofiber membrane followed a pseudo‐second‐order kinetic model, which could be represented by the Langmuir isotherm model, and the maximum adsorption capacity was 35.44 mg·g−1. In addition, the photocatalytic degradation of methylene blue by TP4 nanofiber membrane followed a first‐order kinetic model and exhibited high reusability. Therefore, polylactic acid/g‐titania nanofiber membrane, as an efficient dye removal material, shows a good application prospect in wastewater treatment.

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Fabrication of MCC/Cu2O/GO composite foam with high photocatalytic degradation ability toward methylene blue

Cited by 24 publications

References 67 publications

Novel Adsorbent of N-Phenylthiourea-Functionalized Graphene Oxide and Its Removal of Methyl Orange in Aqueous Solutions

Novel Adsorbent of N-Phenylthiourea-Functionalized Graphene Oxide and Its Removal of Methyl Orange in Aqueous Solutions

Reduced Graphene Oxide-Supported Copper(I) Oxide Composites for the Degradation of Methylene Blue: Exploring the Capacity of RGO as an Electron Capturer for Achieving Highly Stable Photocatalytic Activity

Preparation and properties of poly(lactic acid)/g‐titanium dioxide electrospinning membranes based on thiol‐ene click chemistry

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