Assessing the chemical state of chemically deposited copper sulfide: A quantitative analysis of the X-ray photoelectron spectra of the amorphous-to-covellite transition phases

Cabrera-Germán, D.; García-Valenzuela, J.A.; Martínez-Gil, M.; Suárez-Campos, G.; Sotelo-Lerma, M.; Cota–Leal, M.

doi:10.1016/j.apsusc.2019.03.054

Cited by 45 publications

(27 citation statements)

References 74 publications

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“…Furthermore, the peak separation of two spin-orbit was ~19.9 eV, which confirms the existence of Cu 1+ ions in CuS and is comparable to the reported value [29,30]. Further, there is no satellite peak clearly indicating the Cu 1+ oxidation state [31]. In a similar way, the high-resolution S 2p peak also has a two spin-orbit splitting of S 2p 3/2 and S 2p 1/2 at 162.1 and 163.4 eV with a peak separation of 2.3 eV clearly showing the presence of S 2− in the composite.…”

Section: Resultssupporting

confidence: 81%

3D-Flower-Like Copper Sulfide Nanoflake-Decorated Carbon Nanofragments-Modified Glassy Carbon Electrodes for Simultaneous Electrocatalytic Sensing of Co-existing Hydroquinone and Catechol

Alshahrani

Miao

Zhang

et al. 2019

Sensors

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A copper sulfide nanoflakes-decorated carbon nanofragments-modified glassy carbon electrode (CuS-CNF/GCE) was fabricated for the electrocatalytic differentiation and determination of hydroquinone (HQ) and catechol (CC). The physicochemical properties of the CuS-CNF were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and Raman spectroscopy. The electrocatalytic determination of HQ and CC over the CuS-CNF/GCE was evaluated by cyclic voltammetry and differential pulse voltammetry. An excellent detection limit and sensitivity of the CuS-CNF/GCE are obtained (0.293 µM and 0.259 µM) with a sensitivity of 184 nA µM−1 cm−2 and 208 nA µM−1 cm−2 (S/N=3) for HQ and CC, respectively. In addition, the CuS-CNF/GCE shows a selective identification of HQ and CC over potential interfering metal ions (Zn2+, Na+, K+, NO3−, SO42−, Cl−) and organic compounds (ascorbic acid, glucose), and a satisfactory recovery is also obtained in the spiked water samples. These results suggest that the CuS-CNF/GCE can be used as an efficient electrochemical sensor for the simultaneous determination of co-existing environmental pollutants such as HQ and CC in water environments with high selectivity and acceptable reproducibility.

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Section: Resultssupporting

confidence: 81%

3D-Flower-Like Copper Sulfide Nanoflake-Decorated Carbon Nanofragments-Modified Glassy Carbon Electrodes for Simultaneous Electrocatalytic Sensing of Co-existing Hydroquinone and Catechol

Alshahrani

Miao

Zhang

et al. 2019

Sensors

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“…Adventitious surface oxidation could be found on all three films in the form of CuSO 4. The thickness of the film does not change the chemical bonding of the material; however, there is a very slight blueshift observed as the film gets thicker. The increase in binding energy could be attributed to shorter bond lengths as the film becomes thicker as the surface is shielded from any influence from the PET substrate.…”

Section: Resultsmentioning

confidence: 95%

Energy-Efficient Stacks—Covellite (CuS) on Polyethylene Terephthalate Film: A Sustainable Solution to Heat Management

Rath

Chua

et al. 2020

J. Phys. Chem. C

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Regulating the temperature of buildings has the highest expenditure of energy (35−40%); thus, transparent heat reflectors (THRs) have been at the forefront of passive cooling technology due to its ability to reflect near-infrared (NIR) wavelengths without compromising optical transmission. Current designs like metallic thin films and dielectric− metal−dielectric are expensive and face complications with material incompatibility, oxidation, and interdiffusion, which hamper their performance. A cost-effective THR using a single-layer coating has not yet been achieved due to the susceptibility of metals to oxidation. In this work, a layer of CuS was fabricated onto flexible polyethylene terephthalate (PET) via radio frequency magnetron sputtering (RFMS), a high throughput method known for its conformal large-area fabrication. The 150 nm-thick CuS-PET films demonstrated a visible transmission T 550 nm of 64.1% and NIR reflectance of 50% that resulted in 8 °C passive cooling. Additionally, wetting the surface resulted in a total of 11 °C of passive cooling due to its hydrophilicity, giving each household an estimated 20% of cost saving per year. Moreover, CuS-PET films are stable in ambient conditions due to instantaneous surface passivation, preventing it from being oxidized and retaining its performance even after three months. Through the optimization of the RFMS fabrication of CuS-PET films, the realization of a cost-effective, single-layer, flexible, and industrially scalable THR is possible.

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“…50,51 As the NPs underwent self-assembly for 2 h, Cu 2p 1/2 at 953.9 eV, Cu 2p 3/2 at 933.9 eV, and small satellite peaks emerged at the Cu 2p region (green curve), which originated from Cu (II). 52 The S 2p data showed that the S 2p 1/2 and 2p 2/3 peaks at 163.8 and 162.7 eV appeared, which were assigned to S 2− species in roxbyite (Cu 7 S 4 ) phase. 53,54 After further self-assembly, the intensity of Cu (II) 2p and S 2p peaks increased (blue curve), which represented a gradual phase transition by the oxidation of Cu (I) to Cu(II), indicating the Cu 2−x S phase of the NFs.…”

Section: Resultsmentioning

confidence: 97%

Broad Chiroptical Activity from Ultraviolet to Short-Wave Infrared by Chirality Transfer from Molecular to Micrometer Scale

et al. 2021

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Chiral nanomaterials provide a rich platform for versatile applications. Tuning the wavelength of polarization rotation maxima in the broad range including short-wave infrared (SWIR) is a promising candidate for infrared neural stimulation, imaging, and nanothermometry. However, the majority of previously developed chiral nanomaterials reveal the optical activity in a relatively shorter wavelength range (ultraviolet−visible, UV−vis), not in SWIR. Here, we demonstrate a versatile method to synthesize chiral copper sulfides using cysteine, as the stabilizer, and transferring the chirality from molecular-to the microscale through self-assembly. The assembled structures show broad chiroptical activity in the UV− vis-NIR-SWIR region (200−2500 nm). Importantly, we can tune the chiroptical activity by simply changing the reaction conditions. This approach can be extended to materials platforms for developing next-generation optical devices, metamaterials, telecommunications, and asymmetric catalysts.

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Assessing the chemical state of chemically deposited copper sulfide: A quantitative analysis of the X-ray photoelectron spectra of the amorphous-to-covellite transition phases

Cited by 45 publications

References 74 publications

3D-Flower-Like Copper Sulfide Nanoflake-Decorated Carbon Nanofragments-Modified Glassy Carbon Electrodes for Simultaneous Electrocatalytic Sensing of Co-existing Hydroquinone and Catechol

3D-Flower-Like Copper Sulfide Nanoflake-Decorated Carbon Nanofragments-Modified Glassy Carbon Electrodes for Simultaneous Electrocatalytic Sensing of Co-existing Hydroquinone and Catechol

Energy-Efficient Stacks—Covellite (CuS) on Polyethylene Terephthalate Film: A Sustainable Solution to Heat Management

Broad Chiroptical Activity from Ultraviolet to Short-Wave Infrared by Chirality Transfer from Molecular to Micrometer Scale

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