Shape and phase-controlled synthesis of specially designed 2D morphologies of l-cysteine surface capped covellite (CuS) and chalcocite (Cu2S) with excellent photocatalytic properties in the visible spectrum

Iqbal, Shahid; Bahadur, Ali; Anwer, Shoaib; Ali, Shahid; Saeed, Aamer; Irfan, Rana Muhammad; Li, Hao; Javed, Mohsin; Raheel, Muhammad; Shoaib, Muhammad

doi:10.1016/j.apsusc.2020.146691

Cited by 64 publications

(22 citation statements)

References 70 publications

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“…The green emission band at around 530 nm is ascribed to radiative recombination between the conduction band and copper vacancy-related acceptor levels around the valence band edge [ 48 ]. The emission peaks observed in this study are consistent with the literature [ 47 , 49 , 50 ]. The slight shift observed in the photoluminescence spectra of the CuS nanoparticles might be due to different particle sizes and morphology.…”

Section: Resultssupporting

confidence: 92%

Enhanced Photocatalytic Degradation of Ternary Dyes by Copper Sulfide Nanoparticles

Ajibade

Oluwalana

2021

Nanomaterials

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We report the effect of thermolysis time on the morphological and optical properties of CuS nanoparticles prepared from Cu(II) dithiocarbamate single-source precursor. The as-prepared copper sulfide nanoparticles were used as photocatalysts for the degradation of crystal violet (CV), methylene blue (MB), rhodamine B (RhB), and a ternary mixture of the three dyes (CV/MB/RhB). Powder XRD patterns confirmed the hexagonal covellite phase for the CuS nanoparticles. At the same time, HRTEM images revealed mixed shapes with a particle size of 31.47 nm for CuS1 prepared at 30 min while CuS2 prepared at 1 h consists of mixtures of hexagonal and nanorods shaped particles with an average size of 21.59 nm. Mixed hexagonal and spherically shaped particles with a size of 17.77 nm were obtained for CuS3 prepared at 2 h. The optical bandgaps of the nanoparticles are 3.00 eV for CuS1, 3.26 eV for CuS2 and 3.13 eV for CuS3. The photocatalytic degradation efficiency showed that CuS3 with the smallest particle size is the most efficient photocatalyst and degraded 85% of CV, 100% of MB, and 81% of RhB. The as-prepared CuS showed good stability and recyclability and also degraded ternary dyes mixture (CV/MB/RhB) effectively. The byproducts of the dye degradation were evaluated using ESI-mass spectrometry.

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Section: Resultssupporting

confidence: 92%

Enhanced Photocatalytic Degradation of Ternary Dyes by Copper Sulfide Nanoparticles

Ajibade

Oluwalana

2021

Nanomaterials

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“…Consequently, the Cu 2 S developed a higher crystallite size in the presence of WO 3 , where the space limitation restriction was lower than that of SnO 2 . These results are similar with other reports [37][38][39] indicating the Cu 2 S will use the highest energy sites, which were, in this case, the metal oxide particle, as preferential nucleation points. The WO 3 exhibited the larger crystallite sizes, which favor the Cu 2 S growth mechanism and the formation of extensive component interfaces.…”

Section: Composition and Morphologysupporting

confidence: 92%

Photocatalytic Activity of Cu2S/WO3 and Cu2S/SnO2 Heterostructures for Indoor Air Treatment

Eneşca

Isac

2021

Materials

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Volatile organic compounds (VOCs) are commonly found in indoor spaces (e.g., homes or offices) and are often related to various illnesses, some of them with carcinogenic potential. The origins of VOC release in the indoor environment are in office products, building materials, electronics, cleaning products, furniture, and maintenance products. VOC removal can be done based on two types of technologies: adsorption in specific materials and decomposition via oxidative processes. The present article reports the development and photocatalytic activity of two heterostructures (Cu2S/WO3 and Cu2S/SnO2) used for indoor air decontamination. The acetaldehyde removal rate is discussed in correlation with the S-scheme mechanisms established between the heterostructure components but also comparatively with the bare catalysts’ activity. Acetaldehyde was considered as a VOC reference because it was found by the International Agency for Research on Cancer to be one of the most frequent air toxins with potential carcinogenic effects. The samples contained monoclinic WO3, tetragonal SnO2, and orthorhombic Cu2S crystalline structures. The Cu2S crystallite size in the heterostructure varied from 75.9 to 82.4 Å, depending on the metal oxide substrate. The highest photocatalytic efficiency (75.7%) corresponded to Cu2S/SnO2, with a constant rate of 0.106 s−1 (which was three times faster than WO3 or SnO2 and seven and a half times faster than Cu2S).

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“…14,15 Photocatalyst faces different problems such as fast electron-hole recombination, photo-corrosion, bandgap position, and quantum efficiency. 16,17 The researchers are engaged to solve these problems to make efficient photocatalysts and developed various types of photocatalysts. 18,19 Among these, the heterogeneous photocatalyst is a good choice due to its efficiency under visible light.…”

Section: Introductionmentioning

confidence: 99%

Designing a novel visible-light-driven heterostructure Ni–ZnO/S-g-C₃N₄ photocatalyst for coloured pollutant degradation

et al. 2021

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Shape and phase-controlled synthesis of specially designed 2D morphologies of l-cysteine surface capped covellite (CuS) and chalcocite (Cu2S) with excellent photocatalytic properties in the visible spectrum

Cited by 64 publications

References 70 publications

Enhanced Photocatalytic Degradation of Ternary Dyes by Copper Sulfide Nanoparticles

Enhanced Photocatalytic Degradation of Ternary Dyes by Copper Sulfide Nanoparticles

Photocatalytic Activity of Cu2S/WO3 and Cu2S/SnO2 Heterostructures for Indoor Air Treatment

Designing a novel visible-light-driven heterostructure Ni–ZnO/S-g-C₃N₄ photocatalyst for coloured pollutant degradation

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Shape and phase-controlled synthesis of specially designed 2D morphologies of l-cysteine surface capped covellite (CuS) and chalcocite (Cu2S) with excellent photocatalytic properties in the visible spectrum

Cited by 64 publications

References 70 publications

Enhanced Photocatalytic Degradation of Ternary Dyes by Copper Sulfide Nanoparticles

Enhanced Photocatalytic Degradation of Ternary Dyes by Copper Sulfide Nanoparticles

Photocatalytic Activity of Cu2S/WO3 and Cu2S/SnO2 Heterostructures for Indoor Air Treatment

Designing a novel visible-light-driven heterostructure Ni–ZnO/S-g-C3N4 photocatalyst for coloured pollutant degradation

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Designing a novel visible-light-driven heterostructure Ni–ZnO/S-g-C₃N₄ photocatalyst for coloured pollutant degradation