Depositing of CuS nanocrystals upon the graphene scaffold and their photocatalytic activities

Wang, Yongbin; Zhang, Lixin; Jiu, Hongfang; Li, Na; Sun, Yun

doi:10.1016/j.apsusc.2014.02.058

Cited by 73 publications

(33 citation statements)

References 51 publications

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“…32 Moreover, peaks at 1380, 1270 and 1050 cm -1 are observed in the spectrum of GO, which can be indexed to the stretching vibrations of C-OH, C-O-C and C-O, respectively. 33,34 However, most of these oxygen functional groups derived disappear in the spectrum of the CuSNWs/rGO composites, indicating that GO has been reduced to rGO in our reaction system. The results agree well with the result of XRD and further confirm that CuSNWs/rGO nanocomposites can be obtained by our simple, one-pot method.…”

Section: Characterizations Of Morphology and Structurementioning

confidence: 94%

“…The results agree well with the result of XRD and further confirm that CuSNWs/rGO nanocomposites can be obtained by our simple, one-pot method. Besides, the peaks of C-S stretching (1097 cm -1 ) can be found in the spectrum of the CuSNWs/rGO composites indicating that CuS nanowires are chemically bonded to the rGO, 34 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 11 into the nanobundle. The HRTEM image (Figure 3d) of CuSNWs/rGO (enclosed by dash line in Figure 3c)...…”

Section: Characterizations Of Morphology and Structurementioning

confidence: 99%

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One-Pot Synthesis of Copper Sulfide Nanowires/Reduced Graphene Oxide Nanocomposites with Excellent Lithium-Storage Properties as Anode Materials for Lithium-Ion Batteries

Feng

Zhang

Yang

et al. 2015

ACS Appl. Mater. Interfaces

123

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Copper sulfide nanowires/reduced graphene oxide (CuSNWs/rGO) nanocompsites are successfully synthesized via a facile one-pot and template-free solution method in a dimethyl sulfoxide (DMSO)-ethyl glycol (EG) mixed solvent. It is noteworthy that the precursor plays a crucial role in the formation of the nanocomposites structure. SEM, TEM, XRD, IR and Raman spectroscopy are used to investigate the morphological and structural evolution of CuSNWs/rGO nanocomposites. The as-fabricated CuSNWs/rGO nanocompsites show remarkably improved Li-storage performance, excellent cycling stability as well as high-rate capability compared with pristine CuS nanowires. It obtains a reversible capacity of 620 mAh g(-1) at 0.5C (1C = 560 mA g(-1)) after 100 cycles and 320 mAh g(-1) at a high current rate of 4C even after 430 cycles. The excellent lithium storage performance is ascribed to the synergistic effect between CuS nanowires and rGO nanosheets. The as-formed CuSNWs/rGO nanocomposites can effectively accommodate large volume changes, supply a 2D conducting network and trap the polysulfides generated during the conversion reaction of CuS.

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Section: Characterizations Of Morphology and Structurementioning

confidence: 94%

Section: Characterizations Of Morphology and Structurementioning

confidence: 99%

One-Pot Synthesis of Copper Sulfide Nanowires/Reduced Graphene Oxide Nanocomposites with Excellent Lithium-Storage Properties as Anode Materials for Lithium-Ion Batteries

Feng

Zhang

Yang

et al. 2015

ACS Appl. Mater. Interfaces

123

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“…This suggests a strong interaction between CuS and these groups. The peak at 623 cm −1 corresponds to the characteristic peak of CuS [26]. Also, the spectrum of gelatin/CuS/PVA showed the buildup of the peak at 1654 cm −1 and the disappearance of the band at 1596 cm −1 , which might be related to the continuous decrease of -NH 2 groups as a result of the crosslinking process and the complexation [18].…”

Section: Photocatalytic Degradation Studiesmentioning

confidence: 98%

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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“…10 To overcome these negative effects, recyclable heterogeneous catalysts like metal oxides, hydroxides and suldes have been used to replace homogeneous catalysts. [11][12][13][14][15][16] Since then, enormous progress has been made in heterogeneous catalysis; however, most catalysts still show stability issues at certain values of pH, particularly under strong alkaline conditions. Hence, it is necessary to prepare other types of catalysts with a high catalytic activity and a wide applicable pH range.…”

Section: Introductionmentioning

confidence: 99%

Multiwalled carbon nanotube-supported CuCo₂S₄ as a heterogeneous Fenton-like catalyst with enhanced performance

et al. 2017

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In this paper, we prepared CuCo 2 S 4 /MWCNTs as a heterogeneous iron-free bimetal catalyst for the degradation of methylene blue (MB) dye by uniformly synthesizing CuCo 2 S 4 nanoparticles on the surfaces of multiwalled carbon nanotubes (MWCNTs). The homogeneous nanostructure, tuned by MWCNTs, and the efficient electron transfer from CuCo 2 S 4 to MWCNTs resulted in a quite decent catalytic activity, which was superior to that of pristine CuCo 2 S 4 and monometal sulfides. Moreover, CuCo 2 S 4 /MWCNTs maintained a good catalytic performance over a broad pH range of 3 to 12, and exhibited better MB degradation rates under alkaline conditions. Meanwhile, the catalyst was reusable for up to three cycles due to the strong interaction between the nanoparticles and MWCNTs. The results demonstrate that CuCo 2 S 4 /MWCNTs is an improved Fenton catalyst and a promising candidate to substitute iron-based catalysts for the treatment of wastewater containing dyes.

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Depositing of CuS nanocrystals upon the graphene scaffold and their photocatalytic activities

Cited by 73 publications

References 51 publications

One-Pot Synthesis of Copper Sulfide Nanowires/Reduced Graphene Oxide Nanocomposites with Excellent Lithium-Storage Properties as Anode Materials for Lithium-Ion Batteries

One-Pot Synthesis of Copper Sulfide Nanowires/Reduced Graphene Oxide Nanocomposites with Excellent Lithium-Storage Properties as Anode Materials for Lithium-Ion Batteries

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

Multiwalled carbon nanotube-supported CuCo₂S₄ as a heterogeneous Fenton-like catalyst with enhanced performance

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Depositing of CuS nanocrystals upon the graphene scaffold and their photocatalytic activities

Cited by 73 publications

References 51 publications

One-Pot Synthesis of Copper Sulfide Nanowires/Reduced Graphene Oxide Nanocomposites with Excellent Lithium-Storage Properties as Anode Materials for Lithium-Ion Batteries

One-Pot Synthesis of Copper Sulfide Nanowires/Reduced Graphene Oxide Nanocomposites with Excellent Lithium-Storage Properties as Anode Materials for Lithium-Ion Batteries

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

Multiwalled carbon nanotube-supported CuCo2S4 as a heterogeneous Fenton-like catalyst with enhanced performance

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Multiwalled carbon nanotube-supported CuCo₂S₄ as a heterogeneous Fenton-like catalyst with enhanced performance