Facile room-temperature synthesis of carboxylated graphene oxide-copper sulfide nanocomposite with high photodegradation and disinfection activities under solar light irradiation

Yu, Shuyan; Liu, Jincheng; Zhu, Wenxuan; Hu, Zhong‐Ting; Lim, Teik−Thye; Yan, Xiaoli

doi:10.1038/srep16369

Cited by 110 publications

(47 citation statements)

References 29 publications

(34 reference statements)

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“…form due to the existence of Cu 2+ vacancy [40,41]. Two strong peaks are consistent with the literature data of Cu + 2p 3/2 and 2p 1/2 [42,43,44]. On the sides of Cu + 2p 3/2 and 2p 1/2 peaks, two low-intensity components appeared, which can be assigned to the Cu 2+ oxidation state [45,46].…”

Section: Resultssupporting

confidence: 86%

Enhanced Photocatalytic Performance under Visible and Near-Infrared Irradiation of Cu1.8Se/Cu3Se2 Composite via a Phase Junction

et al. 2017

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A novel Cu1.8Se/Cu3Se2 composite photocatalyst was prepared by the simple precipitation method. This composite possesses a wide photoabsorption until the range of near-infrared light, and exhibits significantly enhanced photocatalytic activity for methyl orange degradation under visible and near-infrared light irradiation compared with bare Cu1.8Se and Cu3Se2. The mechanism of this outstanding photocatalytic behavior can be explained by the calculated energy band positions. The efficient charge separation via a phase junction of Cu1.8Se/Cu3Se2 composite would make a great contribution to its much-enhanced photocatalytic efficiency.

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Section: Resultssupporting

confidence: 86%

Enhanced Photocatalytic Performance under Visible and Near-Infrared Irradiation of Cu1.8Se/Cu3Se2 Composite via a Phase Junction

et al. 2017

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“…The difference between the two peak position is Δ = 19.82 eV, which is in agreement with the literature. The most important point here is that we did not observe any satellite peak corresponding to Cu 2+ species ruling out the presence of CuO in our samples, even though we have O in our sample that is probably on the most top layer of the surface due to environmental exposure [46].…”

Section: X-ray Photoelectron Spectroscopymentioning

confidence: 89%

Effect of Ag Ion Implantation on SPR of Cu-C60 Nanocomposite Thin Film

et al. 2017

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Cu-C 60 nanocomposite thin films are synthesized by co-deposition restive heating method on glass, silicon, and TEM grid substrates. Rutherford backscattering spectroscopy (RBS) analysis is used for determining the composition of Cu and thickness of thin film which one found to be ∼13 at% and ∼28 nm, respectively. The deposited thin films are irradiated with 100 keV Ag ion at different fluences ranging from 1 × 10 14 to 3 × 10 16 ions/cm 2 . Being of low energy, Ag ions got implanted in SiO 2 substrate up to a depth of 30-40 nm that results in wide surface plasmon resonance (SPR) band in combination with SPR of Cu nanoparticles. UVvisible absorption spectroscopy demonstrates the SPR peak arises due to copper nanoparticles embedded in fullerene C 60 matrix on irradiation of nanocomposite thin film and its variation under implantation of Ag nanoparticles in SiO 2 substrate. Structural modifications due to ion irradiation are analyzed by Raman and transmission electron microscopy (TEM). Raman spectroscopy study reveals the transformation of fullerene C 60 into amorphous carbon (a-C) with increasing fluence. Variation in particle distribution is observed under TEM. The average particle sizes are found to be ∼4 ± 0.7 and ∼6 ± 0.4 nm for pristine and 100 keV Ag ion-irradiated thin films, respectively. Atomic force microscopy (AFM) confirms the increase in grain size with increase in roughness of nanocomposite thin films under the effect of implantation. Xray photoelectron spectroscopy (XPS) confirms the presence of Cu and C from their chemical bonding in Cu-C 60 nanocomposite thin films.

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“…They showed that CuS prepared by this method had efficient catalytic activity, making it a cost-effective and convenient method for the treatment of dye-contaminated wastewater. Yu, et al [22] reported that carboxylic acid functionalized graphene oxide-copper (II) sulfide nanoparticle composite (GO-COOHCuS) was prepared from carboxylated graphene oxide and copper precursor in dimethyl sulfoxide (DMSO) by a facile synthesis process at room temperature. They reported their application to the photocatalytic degradation of phenol and Rhodamine B (RhB), as well as the inactivation of Escherichia coli (E. coli) and Bacillus subtilis (B. subtilis) under solar light irradiation using the as-synthesized materials as the photocatalysts.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Rhodamine B Dye in Wastewater Using Gelatin/CuS/PVA Nanocomposites under Solar Light Irradiation

Al‐Kahtani¹

2017

JBNB

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The crosslinked gelatin/CuS/PVA nanocomposite catalyst prepared using gamma irradiation as initiator was extensively characterized using several techniques including transmission electron microscopy (TEM), UV-Vis spectroscopy, infrared spectroscopy (IR) and X-ray diffraction (XRD). We chose Rhodamine B (RhB) dye as a model contaminant in order to investigate its Photocatalytic activity under solar light irradiation. The effects of pH, catalyst concentration and RhB concentration on degradation reaction were also investigated. Similar to the observed trend for the photocatalytic oxidation of other organic compounds, the efficiency of photocatalytic degradation of RhB tended to decrease with increasing the concentration of RhB. The degradation efficiency of RhB is found to increase as pH is increased up to pH of 10, then starts decreasing at pH values higher than 10. The degradation efficient of RhB is found to increase as the amount of the catalyst dosage increases up to an optimum value of 0.25 g. Increasing the concentrations of photocatalyst beyond 0.25 g was found to decrease the photocatalytic activity of RhB. It was proven that the degradation process of RhB reaction rate obeyed a pseudo-first-order reaction of the catalyst concentration of gelatin/CuS/PVA nanocomposite. The degradation kinetics was found to fit well Langmuir-Hinshelwood rate law. The results obtained showed that after using the catalyst five times repeatedly, the catalyst retained its efficiency and the rate of the degradation process was still above 80%.

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Facile room-temperature synthesis of carboxylated graphene oxide-copper sulfide nanocomposite with high photodegradation and disinfection activities under solar light irradiation

Cited by 110 publications

References 29 publications

Enhanced Photocatalytic Performance under Visible and Near-Infrared Irradiation of Cu1.8Se/Cu3Se2 Composite via a Phase Junction

Enhanced Photocatalytic Performance under Visible and Near-Infrared Irradiation of Cu1.8Se/Cu3Se2 Composite via a Phase Junction

Effect of Ag Ion Implantation on SPR of Cu-C60 Nanocomposite Thin Film

Photocatalytic Degradation of Rhodamine B Dye in Wastewater Using Gelatin/CuS/PVA Nanocomposites under Solar Light Irradiation

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