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Cabrera-German D, Martínez-Gil M, Fuentes-Ríos L, Montiel-González Z, Mazón-Montijo DA, Sotelo-Lerma M. Insights into the SILAR Processing of Cu xZn 1-xS Thin Films via a Chemical, Structural, and Optoelectronic Assessment. ACS OMEGA 2023; 8:48056-48070. [PMID: 38144126 PMCID: PMC10734041 DOI: 10.1021/acsomega.3c06848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 10/23/2023] [Accepted: 11/23/2023] [Indexed: 12/26/2023]
Abstract
Careful analysis of the chemical state of CuxZn1-xS thin films remains an underdeveloped topic although it is key to a better understanding of the phase transformations and the linking between structural and optoelectronic properties needed for tuning the performance of CuxZn1-xS-based next-generation energy devices. Here, we propose a chemical formulation and formation mechanism, providing insights into the successive ionic layer adsorption and reaction (SILAR) processing of CuxZn1-xS, in which the copper concentration directly affects the behavior of the optoelectronic properties. Via chemical, optoelectronic, and structural characterization, including quantitative X-ray photoelectron spectroscopy, we determine that the CuxZn1-xS thin films at low copper concentration are composed of ZnS, metastable CuxZn1-xS, and CuS, where the evidence suggests that a depth compositional gradient exists, which contrasts with homogeneous films reported in the literature. The oxidation states for copper and sulfide species indicate that the films grow following a formation mechanism governed by ionic exchange and diffusion processes. At high copper concentrations, the CuxZn1-xS thin films are covellite CuS that grew on a ZnS seed layer. Hence, this work reiterates that future research related to fine-tuning the application of this material requires a careful analysis of the depth-profile compositional and structural characteristics that can enable high conductivity and transparency.
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Affiliation(s)
- Dagoberto Cabrera-German
- Departamento
de Investigación en Polímeros y Materiales, Universidad de Sonora, Blvd. Luis Encinas y Rosales s/n, Hermosillo, Sonora 83000, México
| | - Miguel Martínez-Gil
- Departamento
de Física, Matemáticas e Ingeniería, Universidad de Sonora, Campus Navojoa, Navojoa, Sonora 85880, México
| | - Lorenzo Fuentes-Ríos
- Departamento
de Investigación en Polímeros y Materiales, Universidad de Sonora, Blvd. Luis Encinas y Rosales s/n, Hermosillo, Sonora 83000, México
| | - Zeuz Montiel-González
- CONAHCYT-Centro
de Investigación en Materiales Avanzados S. C., subsede Monterrey, Apodaca, Nuevo Leon 66628, México
- Laboratorio
de Diseño y Optimización de Recubrimientos Avanzados
(DORA-Lab), CIMAV-Mty/TECNL-CIIT, Parque
de Investigación e Innovación Tecnológica, Apodaca, Nuevo Leon 66629, México
| | - Dalia Alejandra Mazón-Montijo
- Laboratorio
de Diseño y Optimización de Recubrimientos Avanzados
(DORA-Lab), CIMAV-Mty/TECNL-CIIT, Parque
de Investigación e Innovación Tecnológica, Apodaca, Nuevo Leon 66629, México
- CONAHCYT-Tecnológico
Nacional de México campus Nuevo León (TECNL), Centro
de Investigación e Innovación Tecnológica (CIIT), Apodaca, Nuevo Leon 66629, México
| | - Mérida Sotelo-Lerma
- Departamento
de Investigación en Polímeros y Materiales, Universidad de Sonora, Blvd. Luis Encinas y Rosales s/n, Hermosillo, Sonora 83000, México
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Oppong-Antwi L, Huang B, Hart JN. Electronic Properties of Transition and Alkaline Earth Metal Doped CuS: A DFT Study. Chemphyschem 2023:e202300417. [PMID: 37792575 DOI: 10.1002/cphc.202300417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 09/11/2023] [Indexed: 10/06/2023]
Abstract
CuS is a unique semiconductor with potential in optoelectronics. Its unusual electronic structure, including a partially occupied valence band, and complex crystal structure with an S-S bond offer unique opportunities and potential applications. In this work, the use of doping to optimize the properties of CuS for various applications is investigated by density functional theory (DFT) calculations. Among the dopants studied, Ni, Zn, and Mg may be the most practical due to their lower formation energies. Doping with Fe, Ni, or Ca induces significant distortion, which may be beneficial for achieving materials with high surface areas and active states. Significantly, doping alters the conductor-like behavior of CuS, opening a band gap by increasing bond ionicity and reducing the S-S bond covalency. Thus, doping CuS can tune the plasmonic properties and transform it from a conductor to an intrinsic fluorescent semiconductor. Ni and Fe doping give the lowest band gaps (0.35 eV and 0.39 eV, respectively), while Mg doping gives the highest (0.86 eV). Doping with Mg, Ca, and Zn may enhance electron mobility and charge separation. Most dopants increase the anisotropy of electron-to-hole mass ratios, enabling device design that exploits directional-dependence for improved performance.
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Affiliation(s)
- Louis Oppong-Antwi
- School of Materials Science and Engineering, UNSW, Sydney, NSW, 2052, Australia
| | - Bosi Huang
- School of Materials Science and Engineering, UNSW, Sydney, NSW, 2052, Australia
| | - Judy N Hart
- School of Materials Science and Engineering, UNSW, Sydney, NSW, 2052, Australia
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3
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Zhu J, Zi S, Zhang N, Hu Y, An L, Xi P. Surface Reconstruction of Covellite CuS Nanocrystals for Enhanced OER Catalytic Performance in Alkaline Solution. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2301762. [PMID: 37150854 DOI: 10.1002/smll.202301762] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 04/05/2023] [Indexed: 05/09/2023]
Abstract
Oxygen evolution reaction (OER) is one of the important half-reactions in energy conversion equipment such as water-spitting devices, rechargeable metal-air batteries, and so on. It is beneficial to develop efficient and low-cost catalysts that understand the reaction mechanism of OER and analyze the reconstruction phenomenon of transition metal sulfide. Interestingly, copper sulfide and cuprous sulfide with the same components possess different reconstruction behaviors due to their different metal ion valence states and different atomic arrangement modes. Because of a unique atomic arrangement sequence and certain cationic defects, the reconstruction phenomenon of CuS nanomaterials are that S2- is firstly oxidized to SO4 2- and then Cux + is converted into CuO via Cu(OH)2 . In addition, the specific "modified hourglass structure" of CuS with excellent conductivity is easier to produce intermediates. Compared with Cu2 S, CuS exhibits excellent OER activity with a lower overpotential of 192 mV at 10 mA cm-2 and remarkable electrochemical stability in 1.0 m KOH for 120 h. Herein, this study elucidates the reconstruction modes of CuS and Cu2 S in the OER process and reveals that CuS has a stronger CuS bond and a faster electronic transmission efficiency due to "modified hourglass structure," resulting in faster reconstruction of CuS than Cu2 S.
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Affiliation(s)
- Jiamin Zhu
- State Key Laboratory of Applied Organic Chemistry, Frontiers Science Center for Rare Isotopes, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Shengjie Zi
- State Key Laboratory of Applied Organic Chemistry, Frontiers Science Center for Rare Isotopes, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Nan Zhang
- State Key Laboratory of Applied Organic Chemistry, Frontiers Science Center for Rare Isotopes, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Yang Hu
- State Key Laboratory of Applied Organic Chemistry, Frontiers Science Center for Rare Isotopes, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Li An
- State Key Laboratory of Applied Organic Chemistry, Frontiers Science Center for Rare Isotopes, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Pinxian Xi
- State Key Laboratory of Applied Organic Chemistry, Frontiers Science Center for Rare Isotopes, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
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4
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Burungale VV, Bae H, Mane P, Cha AN, Ryu SW, Kang SH, Ha JS. A Ni-modified CuS-based self-supported electrocatalyst with nanobead-like porous morphology for efficient hydrogen production in basic media. NEW J CHEM 2023. [DOI: 10.1039/d2nj06114g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Abstract
The enhanced HER catalytic activity of a porous CuS-based catalyst, which was converted from Cu2O, is due to both increased surface porosity and intrinsic activity resulting from the synergy between Cu and Ni.
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Affiliation(s)
- Vishal V. Burungale
- School of Chemical Engineering, Chonnam National University, 77 Yongbongro, Buk-gu, Gwangju 61186, Korea
| | - Hyojung Bae
- Optoelectronics Convergence Research Center, Chonnam National University, 77 Yongbongro, Buk-gu, Gwangju 61186, Korea
| | - Pratik Mane
- School of Chemical Engineering, Chonnam National University, 77 Yongbongro, Buk-gu, Gwangju 61186, Korea
| | - An-Na Cha
- Energy Convergence Core Facility, Chonnam National University, 77 Yongbongro, Buk-gu, Gwangju 61186, Korea
| | - Sang-Wan Ryu
- Optoelectronics Convergence Research Center, Chonnam National University, 77 Yongbongro, Buk-gu, Gwangju 61186, Korea
| | - Soon-Hyung Kang
- Optoelectronics Convergence Research Center, Chonnam National University, 77 Yongbongro, Buk-gu, Gwangju 61186, Korea
| | - Jun-Seok Ha
- School of Chemical Engineering, Chonnam National University, 77 Yongbongro, Buk-gu, Gwangju 61186, Korea
- Optoelectronics Convergence Research Center, Chonnam National University, 77 Yongbongro, Buk-gu, Gwangju 61186, Korea
- Energy Convergence Core Facility, Chonnam National University, 77 Yongbongro, Buk-gu, Gwangju 61186, Korea
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5
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Preparation of CuS/PbS/ZnO Heterojunction Photocatalyst for Application in Hydrogen Production. Catalysts 2022. [DOI: 10.3390/catal12121677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
A hexagonal wurtzite ZnO photocatalyst was prepared via a precipitation method. CuS nanoparticles (NPs) and PbS quantum dots (QDs) were loaded onto ZnO via a hydrothermal method to obtain a CuS/PbS/ZnO heterojunction photocatalyst. The CuS/PbS/ZnO photocatalyst obtained via the abovementioned method has significant absorption capabilities in the ultraviolet to near-infrared spectral regions, and effectively reduced the recombination of electron–hole pairs during a photocatalytic reaction. Electron microscope images showed that in the CuS/PbS/ZnO photocatalyst prepared at 130 °C, the particle size of the PbS QDs was approximately 5.5–5.7 nm, and the bandgap determined from the Tauc plot was 0.84 eV; this catalyst demonstrated the best water splitting effect. Furthermore, after adding a 0.25 M mixed solution of Na2S and Na2SO3 as the sacrificial reagent in photocatalysis for 5 h, the hydrogen production efficiency from water splitting reached 6654 μmol g−1 h−1.
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6
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Moëlo Y, Popa AF, Dubost V. The bond valence model as a prospective approach: examination of the crystal structures of copper chalcogenides with Cu bond valence excess. ACTA CRYSTALLOGRAPHICA SECTION B, STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS 2022; 78:627-636. [PMID: 35975829 DOI: 10.1107/s2052520622006138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 06/09/2022] [Indexed: 06/15/2023]
Abstract
Bond valence analysis has been applied to various copper chalcogenides with copper valence excess, i.e. where the formal valence of copper exceeds 1. This approach always reveals a copper bond valence excess relative to the unit value, correlated to an equivalent ligand bond valence deficit. In stoichiometric chalcogenides, this corresponds to one ligand electron in excess per formula unit relative to the valence equilibrium considering only CuI. This ligand electron in excess is 50/50 shared between all or part of the Cu-atom positions, and all or part of the ligand-atom positions. In Cu3Se2, only one of the two Cu positions is involved in this sharing. It would indicate a special type of multicentre bonding (`one-electron co-operative bonding'). Calculated and ideal structural formulae according to this bond valence distribution are presented. At the crystal structure scale, Cu-ligand bonds implying the single electron in excess form one-, two- or three-dimensional subnetworks. Bond valence distribution according to two two-dimensional subnets is detailed in covellite, CuS. This bond valence description is a formal crystal-chemical representation of the metallic conductivity of holes (mixing between Cu 3d bands and ligand p bands), according to published electronic band structures. Bond valence analysis is a useful and very simple prospective approach in the search for new compounds with targeted specific physical properties.
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Affiliation(s)
- Yves Moëlo
- Nantes Université, CNRS, Institut des Matériaux de Nantes Jean Rouxel, IMN, F-44000 Nantes, France
| | - Aurelian Florin Popa
- Nantes Université, CNRS, Institut des Matériaux de Nantes Jean Rouxel, IMN, F-44000 Nantes, France
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7
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Chen L, Kong Z, Hu H, Tao H, Wang Y, Gao J, Li G. Manipulating Cation Exchange Reactions in Cu 2-xS Nanoparticles via Crystal Structure Transformation. Inorg Chem 2022; 61:9063-9072. [PMID: 35671331 DOI: 10.1021/acs.inorgchem.2c00532] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Copper-deficient Cu2-xS nanoparticles (NPs) are extensively exploited as a superior cation exchange (CE) template to yield sophisticated nanostructures. Recently, it has been discovered that their CE reactions can be facilely manipulated by copper vacancy density, morphology, and NP size. However, the structural similarity of usually utilized Cu2-xS somewhat limits the manipulation of the CE reactions through the factor of crystal structure because it can strongly influence the process of the reaction. Herein, we report a methodology of crystal structure transformation to manipulate the CE reactions. Particularly, roxbyite Cu1.8S nanodisks (NDs) were converted into solid wurtzite CdS NDs and Janus-type Cu1.94S/CdS NDs by a "full"/partial CE reaction with Cd2+. Afterward, the roxbyite Cu1.8S were pseudomorphically transformed into covellite CuS NDs. Unlike Cu1.8S, the CuS was scarcely exchanged because of the unique disulfide (S-S) bonds and converted into hollow wurtzite CdS under a more reactive condition. The S-S bonds were gradually split and CuS@CdS core@shell-type NDs were generated. Therefore, our findings in the present study provide not only a versatile technique to manipulate CE reactions in Cu2-xS NPs but also a better comprehension of their reaction dynamics and pathways.
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Affiliation(s)
- Lihui Chen
- School of Petrochemical Engineering & Environment, Zhejiang Ocean University, No. 1, Haida South Road, Lincheng Changzhi Island, Zhoushan 316022, China
| | - Zhenzhen Kong
- College of Chemical Engineering, Zhejiang University of Technology, 18, Chaowang Road, Hangzhou 310014, China
| | - Haifeng Hu
- College of Chemical Engineering, Zhejiang University of Technology, 18, Chaowang Road, Hangzhou 310014, China
| | - Hengcong Tao
- School of Petrochemical Engineering & Environment, Zhejiang Ocean University, No. 1, Haida South Road, Lincheng Changzhi Island, Zhoushan 316022, China
| | - Yuhua Wang
- School of Petrochemical Engineering & Environment, Zhejiang Ocean University, No. 1, Haida South Road, Lincheng Changzhi Island, Zhoushan 316022, China
| | - Jing Gao
- College of Chemical Engineering, Zhejiang University of Technology, 18, Chaowang Road, Hangzhou 310014, China
| | - Guohua Li
- College of Chemical Engineering, Zhejiang University of Technology, 18, Chaowang Road, Hangzhou 310014, China
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8
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Kundu A, Adak MK, Kumar Y, Chakraborty B. Electrochemically Derived Crystalline CuO from Covellite CuS Nanoplates: A Multifunctional Anode Material. Inorg Chem 2022; 61:4995-5009. [PMID: 35293211 DOI: 10.1021/acs.inorgchem.1c03830] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In the present era, electrochemical water splitting has been showcased as a reliable solution for alternative and sustainable energy development. The development of a cheap, albeit active, catalyst to split water at a substantial overpotential with long durability is a perdurable challenge. Moreover, understanding the nature of surface-active species under electrochemical conditions remains fundamentally important. A facile hydrothermal approach is herein adapted to prepare covellite (hexagonal) phase CuS nanoplates. In the covellite CuS lattice, copper is present in a mixed-valent state, supported by two different binding energy values (932.10 eV for CuI and 933.65 eV for CuII) found in X-ray photoelectron spectroscopy analysis, and adopted two different geometries, that is, trigonal planar preferably for CuI and tetrahedral preferably for CuII. The as-synthesized covellite CuS behaves as an efficient electro(pre)catalyst for alkaline water oxidation while deposited on a glassy carbon and nickel foam (NF) electrodes. Under cyclic voltammetry cycles, covellite CuS electrochemically and irreversibly oxidized to CuO, indicated by a redox feature at 1.2 V (vs the reversible hydrogen electrode) and an ex situ Raman study. Electrochemically activated covellite CuS to the CuO phase (termed as CuSEA) behaves as a pure copper-based catalyst showing an overpotential (η) of only 349 (±5) mV at a current density of 20 mA cm-2, and the TOF value obtained at η349 (at 349 mV) is 1.1 × 10-3 s-1. A low Rct of 5.90 Ω and a moderate Tafel slope of 82 mV dec-1 confirm the fair activity of the CuSEA catalyst compared to the CuS precatalyst, reference CuO, and other reported copper catalysts. Notably, the CuSEA/NF anode can deliver a constant current of ca. 15 mA cm-2 over a period of 10 h and even a high current density of 100 mA cm-2 for 1 h. Post-oxygen evolution reaction (OER)-chronoamperometric characterization of the anode via several spectroscopic and microscopic tools firmly establishes the formation of crystalline CuO as the active material along with some amorphous Cu(OH)2 via bulk reconstruction of the covellite CuS under electrochemical conditions. Given the promising OER activity, the CuSEA/NF anode can be fabricated as a water electrolyzer, Pt(-)//(+)CuSEA/NF, that delivers a j of 10 mA cm-2 at a cell potential of 1.58 V. The same electrolyzer can further be used for electrochemical transformation of organic feedstocks like ethanol, furfural, and 5-hydroxymethylfurfural to their respective acids. The present study showcases that a highly active CuO/Cu(OH)2 heterostructure can be constructed in situ on NF from the covellite CuS nanoplate, which is not only a superior pure copper-based electrocatalyst active for OER and overall water splitting but also for the electro-oxidation of industrial feedstocks.
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Affiliation(s)
- Avinava Kundu
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Mrinal Kanti Adak
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Yogesh Kumar
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Biswarup Chakraborty
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
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9
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Chen L, Kong Z, Tao H, Hu H, Gao J, Li G. Crystal structure dependent cation exchange reactions in Cu 2-xS nanoparticles. NANOSCALE 2022; 14:3907-3916. [PMID: 35224594 DOI: 10.1039/d1nr08077f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Because of high mobility of Cu+ in crystal lattice, Cu2-xS nanoparticles (NPs) utilized as cation exchange (CE) templates to produce complicated nanomaterials has been extensively investigated. Nevertheless, the structural similarity of commonly used Cu2-xS somewhat limits the exploration of crystal structure dependent CE reactions, since it may dramatically affect the reaction dynamics and pathways. Herein, we select djurleite Cu1.94S and covellite CuS nanodisks (NDs) as starting templates and show that the crystal structure has a strong effect on their CE reactions. In the case of djurleite Cu1.94S NDs, the Cu+ was immediately substituted by Cd2+ and solid wurtzite CdS NDs were produced. At a lower reaction temperature, these NDs were partially substituted, giving rise to the formation of Janus-type Cu1.94S/CdS NDs, and this process is kinetically and thermodynamically favorable. For covellite CuS NDs, they were transformed into hollow CdS NDs under a more aggressive reaction condition due to the unique disulfide covalent bonds. These disulfide bonds distributed along [0 0 1] direction were gradually ruptured/reduced and CuS@CdS core-shell NDs could be obtained. Our findings suggest that not only the CE reaction kinetics and thermodynamics, but also the intermediates and final products are intimately correlated to the crystal structure of the host material.
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Affiliation(s)
- Lihui Chen
- School of Petrochemical Engineering & Environment, Zhejiang Ocean University, No. 1, Haida South Road, Lincheng Changzhi Island, Zhoushan 316022, China.
| | - Zhenzhen Kong
- College of Chemical Engineering, Zhejiang University of Technology, 18, Chaowang Road, Hangzhou 310014, China.
| | - Hengcong Tao
- School of Petrochemical Engineering & Environment, Zhejiang Ocean University, No. 1, Haida South Road, Lincheng Changzhi Island, Zhoushan 316022, China.
| | - Haifeng Hu
- College of Chemical Engineering, Zhejiang University of Technology, 18, Chaowang Road, Hangzhou 310014, China.
| | - Jing Gao
- College of Chemical Engineering, Zhejiang University of Technology, 18, Chaowang Road, Hangzhou 310014, China.
| | - Guohua Li
- College of Chemical Engineering, Zhejiang University of Technology, 18, Chaowang Road, Hangzhou 310014, China.
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10
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Huang M, Wang X, Xing G, Meng C, Li Y, Li X, Fan L, Wan Y, Yang S. Plasmonic Hot Hole Extraction from CuS Nanodisks Enables Significant Acceleration of Oxygen Evolution Reactions. J Phys Chem Lett 2021; 12:7988-7996. [PMID: 34398606 DOI: 10.1021/acs.jpclett.1c01950] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Localized surface plasmon resonance (LSPR) is well known for its unique ability to tune the reactivity of plasmonic materials via photoexcitation; however, it is still an open question as to whether plasmonic holes can be directly extracted to drive valuable chemical reactions. Herein we give an affirmative answer by reporting an illumination-enhanced oxygen evolution reaction (OER) using CuS nanodisks (NDs) alone as the electrocatalyst. Impressively, under 1221 nm laser or xenon lamp illumination, an unprecedented reduction of OER overpotential was observed on the CuS ND-coated electrodes. Transient absorption combined with Mott-Schottky measurements disclosed that near-infrared (NIR) irradiation generated abundant hot holes from LSPR damping in the CuS NDs accounting for the remarkable OER performance enhancement. This is the first report on the direct utilization of plasmonic hot holes in CuS nanomaterials for boosting OER performance, opening up a new route to designing NIR-active photocatalysts/electrocatalysts by exploiting the unique LSPR properties.
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Affiliation(s)
- Min Huang
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Xian Wang
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Guanjie Xing
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Chenchen Meng
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Yunchao Li
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Xiaohong Li
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Louzhen Fan
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Yan Wan
- Key Laboratory of Theoretical and Computational Photochemistry, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Shihe Yang
- Guangdong Key Laboratory of Nano-Micro Material Research, School of Chemical Biology and Biotechnology, Shenzhen Graduate School, Peking University, Shenzhen 518055, China
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11
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Chinnadurai D, Rajendiran R, Kandasamy P. Bimetallic copper nickel sulfide electrocatalyst by one step chemical bath deposition for efficient and stable overall water splitting applications. J Colloid Interface Sci 2021; 606:101-112. [PMID: 34388564 DOI: 10.1016/j.jcis.2021.07.145] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 07/26/2021] [Accepted: 07/29/2021] [Indexed: 02/03/2023]
Abstract
Transition metal sulfides have been intensively investigated as an effective catalyst for overall water splitting application due to their inexorable bifunctional oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) activity. However, the chalcogenides are oxidised during the OER process and hence limit the stability of the electrocatalyst. The synthesized materials should have a higher oxidation state corresponding to the active species in order to improve the stability. In this study, we have employed a one-step chemical bath deposition (CBD) route to synthesis bimetallic copper nickel sulfide (CuNiS) electrocatalyst. We have accomplished a superior OER electrocatalytic activity with a lower overpotential of 337 mV at 10 mA/cm2 current density and a small Tafel slope of 43 mV/dec. Also, we have achieved an excellent HER activity with a very low overpotential of 99 mV at 10 mA/cm2 and a Tafel slope of 63 mV/dec. The constructed electrolyzer attained a lower cell voltage of only 1.55 V to reach the current density of 10 mA/cm2. The stability test carried at a high current density of 200 mA/cm2 for 50 h showed less than 5% increase in Ni3+ active species at the surface ensure the stable performance nature. Thus, this work provides a promising methodology for the synthesis of bimetallic sulfides for enhanced electrocatalytic water splitting with exceptional reliability.
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Affiliation(s)
- Deviprasath Chinnadurai
- Department of Electrical Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Republic of Korea
| | - Rajmohan Rajendiran
- Department of Electrical Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Republic of Korea
| | - Prabakar Kandasamy
- Department of Electrical Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Republic of Korea.
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12
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Chen L, Hu H, Chen Y, Li Y, Gao J, Li G. Sulfur Precursor Reactivity Affecting the Crystal Phase and Morphology of Cu
2−
x
S Nanoparticles. Chemistry 2020; 27:1057-1065. [DOI: 10.1002/chem.202003760] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 10/09/2020] [Indexed: 11/06/2022]
Affiliation(s)
- Lihui Chen
- College of Chemical Engineering Zhejiang University of Technology 18, Chaowang Road Hangzhou 310014 P.R. China
| | - Haifeng Hu
- College of Chemical Engineering Zhejiang University of Technology 18, Chaowang Road Hangzhou 310014 P.R. China
| | - Yuzhou Chen
- College of Chemical Engineering Zhejiang University of Technology 18, Chaowang Road Hangzhou 310014 P.R. China
| | - Yuan Li
- College of Chemical Engineering Zhejiang University of Technology 18, Chaowang Road Hangzhou 310014 P.R. China
| | - Jing Gao
- College of Chemical Engineering Zhejiang University of Technology 18, Chaowang Road Hangzhou 310014 P.R. China
| | - Guohua Li
- College of Chemical Engineering Zhejiang University of Technology 18, Chaowang Road Hangzhou 310014 P.R. China
- State Key Breeding Base of Green Chemistry Synthesis Technology Zhejiang University of Technology 18, Chaowang Road Hangzhou 310032 P.R. China
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13
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Paliwal SS, Maurya V, Joshi KB. First-principles study of electronic structure and fermiology of covellite mineral and its B1, B3 phases. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 32:295501. [PMID: 32150738 DOI: 10.1088/1361-648x/ab7df5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We present the first-principles calculations under the framework of density functional theory to explore the Fermi surface and electronic properties of covellite mineral. The correlation effects are considered applying the +U correction in the density functional theory. Lattice parameters are determined and the possibility of pressure induced phase transitions to the hypothetical B1 and B3 crystals is examined. All calculations show impending B18 → B1 and B3 → B1 phase transitions. Using generalized gradient approximation these are found to occur at 7.4 and 6.48 GPa, respectively. Electronic bands structures of the three crystals highlight metallic properties. Two copper atoms situated at distinct locations in covellite exhibit a distinct role. The Fermi surfaces of all phases are presented. The calculations of B18 map out corrugated cylindrical Fermi surface signifying inter-layer interaction mediated by the S(II)-S(II) bond. The +U correction shows anisotropy in the Fermi surface noted in experiment. It also indicates stronger inter-layer interaction. Applying Debye-Slater and the Debye-Grüneisen models the thermal expansion coefficient, heat capacity and entropy are found and their temperature dependence is discussed.
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Affiliation(s)
- S S Paliwal
- Department of Physics, M L Sukhadia University, Udaipur-313001, India
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14
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Sheardy AT, Arvapalli DM, Wei J. Novel microwave synthesis of near-metallic copper sulfide nanodiscs with size control: experimental and DFT studies of charge carrier density. NANOSCALE ADVANCES 2020; 2:1054-1058. [PMID: 36133037 PMCID: PMC9419483 DOI: 10.1039/d0na00069h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 02/11/2020] [Indexed: 06/01/2023]
Abstract
A simple unprecedented microwave synthesis of size controllable copper sufide (CuS) nanodiscs is reported. The experimental results and density functional theory (DFT)-calculated results show charge carrier densities on the order of 1021 cm-3 with an effective mass of 0.3m e, resulting in near-metallic properties.
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Affiliation(s)
- Alex T Sheardy
- Department of Nanoscience, Joint School of Nanoscience and Nanoengineering, University of North Carolina at Greensboro 2907 E. Gate City Blvd Greensboro NC 27401 USA +1-336-285-2859
| | - Durga M Arvapalli
- Department of Nanoscience, Joint School of Nanoscience and Nanoengineering, University of North Carolina at Greensboro 2907 E. Gate City Blvd Greensboro NC 27401 USA +1-336-285-2859
| | - Jianjun Wei
- Department of Nanoscience, Joint School of Nanoscience and Nanoengineering, University of North Carolina at Greensboro 2907 E. Gate City Blvd Greensboro NC 27401 USA +1-336-285-2859
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15
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Effect of RF Power on the Properties of Sputtered-CuS Thin Films for Photovoltaic Applications. ENERGIES 2020. [DOI: 10.3390/en13030688] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Copper sulfide (CuS) thin films were deposited on a glass substrate at room temperature using the radio-frequency (RF) magnetron-sputtering method at RF powers in the range of 40–100 W, and the structural and optical properties of the CuS thin film were investigated. The CuS thin films fabricated at varying deposition powers all exhibited hexagonal crystalline structures and preferred growth orientation of the (110) plane. Raman spectra revealed a primary sharp and intense peak at the 474 cm−1 frequency, and a relatively wide peak was found at 265 cm−1 frequency. In the CuS thin film deposited at an RF power of 40 W, relatively small dense particles with small void spacing formed a smooth thin-film surface. As the power increased, it was observed that grain size and grain-boundary spacing increased in order. The binding energy peaks of Cu 2p3/2 and Cu 2p1/2 were observed at 932.1 and 952.0 eV, respectively. Regardless of deposition power, the difference in the Cu2+ state binding energies for all the CuS thin films was equivalent at 19.9 eV. We observed the binding energy peaks of S 2p3/2 and S 2p1/2 corresponding to the S2− state at 162.2 and 163.2 eV, respectively. The transmittance and band-gap energy in the visible spectral range showed decreasing trends as deposition power increased. For the CuS/tin sulfide (SnS) absorber-layer-based solar cell (glass/Mo/absorber(CuS/SnS)/cadmium sulfide (CdS)/intrinsic zinc oxide (i-ZnO)/indium tin oxide (ITO)/aluminum (Al)) with a stacked structure of SnS thin films on top of the CuS layer deposited at 100 W RF power, an open-circuit voltage (Voc) of 115 mA, short circuit current density (Jsc) of 9.81 mA/cm2, fill factor (FF) of 35%, and highest power conversion efficiency (PCE) of 0.39% were recorded.
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16
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Liu F, Xu R, Hong L, Yang Z, Li Y, Wang C, Jia H, Yang C. Facile Morphology‐Tunable Preparation of CuS@MoS 2Heterostructures Based on Template Solvothermal Method. ChemistrySelect 2020. [DOI: 10.1002/slct.201904687] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Fangge Liu
- Key Laboratory of Synthetic and Biological ColloidsMinistry of EducationSchool of Chemical and Material EngineeringJiangnan University 1800 Lihu Avenue Wuxi 214122 China
| | - Ruizhi Xu
- Sustainable Energy Laboratory, Faculty of Materials Science and ChemistryChina University of Geosciences (Wuhan) 388 Lumo Road Wuhan 430074 China
| | - Liu Hong
- Key Laboratory of Synthetic and Biological ColloidsMinistry of EducationSchool of Chemical and Material EngineeringJiangnan University 1800 Lihu Avenue Wuxi 214122 China
- Jiangsu SINOJIT Wind EnergyTechnology Co. Ltd, 8 Naxiang Road, Yunting Street Jiangyin 214422 China
| | - Zehui Yang
- Sustainable Energy Laboratory, Faculty of Materials Science and ChemistryChina University of Geosciences (Wuhan) 388 Lumo Road Wuhan 430074 China
| | - Yunxing Li
- Key Laboratory of Synthetic and Biological ColloidsMinistry of EducationSchool of Chemical and Material EngineeringJiangnan University 1800 Lihu Avenue Wuxi 214122 China
| | - Chuanxi Wang
- Institute of New Energy Technology, Ningbo Institute of Industrial TechnologyChinese Academy of Sciences Ningbo 315201 China
- School of Environment and Civil EngineeringJiangnan University 1800 Lihu Avenue Wuxi 214122 China
| | - Hongbing Jia
- Key Laboratory of Soft Chemistry and Functional Materials, Ministry of EducationNanjing University of Science and Technology 200 Xiaolingwei Nanjing 210094 China
| | - Cheng Yang
- Key Laboratory of Synthetic and Biological ColloidsMinistry of EducationSchool of Chemical and Material EngineeringJiangnan University 1800 Lihu Avenue Wuxi 214122 China
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17
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Li X, Liang L, Sun Y, Xu J, Jiao X, Xu X, Ju H, Pan Y, Zhu J, Xie Y. Ultrathin Conductor Enabling Efficient IR Light CO2 Reduction. J Am Chem Soc 2018; 141:423-430. [DOI: 10.1021/jacs.8b10692] [Citation(s) in RCA: 95] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Xiaodong Li
- Hefei National Laboratory for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei 230026, People’s Republic of China
| | - Liang Liang
- Hefei National Laboratory for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei 230026, People’s Republic of China
| | - Yongfu Sun
- Hefei National Laboratory for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei 230026, People’s Republic of China
| | - Jiaqi Xu
- Hefei National Laboratory for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei 230026, People’s Republic of China
| | - Xingchen Jiao
- Hefei National Laboratory for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei 230026, People’s Republic of China
| | - Xiaoliang Xu
- Hefei National Laboratory for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei 230026, People’s Republic of China
| | - Huanxin Ju
- Hefei National Laboratory for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei 230026, People’s Republic of China
| | - Yang Pan
- Hefei National Laboratory for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei 230026, People’s Republic of China
| | - Junfa Zhu
- Hefei National Laboratory for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei 230026, People’s Republic of China
| | - Yi Xie
- Hefei National Laboratory for Physical Sciences at Microscale, National Synchrotron Radiation Laboratory, Key Laboratory of Strongly-Coupled Quantum Matter Physics, University of Science and Technology of China, Hefei 230026, People’s Republic of China
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18
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Walsh A, Sokol AA, Buckeridge J, Scanlon DO, Catlow CRA. Oxidation states and ionicity. NATURE MATERIALS 2018; 17:958-964. [PMID: 30275565 DOI: 10.1038/s41563-018-0165-7] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 08/09/2018] [Indexed: 05/28/2023]
Abstract
The concepts of oxidation state and atomic charge are entangled in modern materials science. We distinguish between these quantities and consider their fundamental limitations and utility for understanding material properties. We discuss the nature of bonding between atoms and the techniques that have been developed for partitioning electron density. While formal oxidation states help us count electrons (in ions, bonds, lone pairs), variously defined atomic charges are usefully employed in the description of physical processes including dielectric response and electronic spectroscopies. Such partial charges are introduced as quantitative measures in simple mechanistic models of a more complex reality, and therefore may not be comparable or transferable. In contrast, oxidation states are defined to be universal, with deviations constituting exciting challenges as evidenced in mixed-valence compounds, electrides and highly correlated systems. This Perspective covers how these concepts have evolved in recent years, our current understanding and their significance.
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Affiliation(s)
- Aron Walsh
- Department of Materials, Imperial College London, London, UK.
- Department of Materials Science and Engineering, Yonsei University, Seoul, Korea.
| | - Alexey A Sokol
- Department of Chemistry, University College London, London, UK
| | - John Buckeridge
- Department of Chemistry, University College London, London, UK
| | - David O Scanlon
- Department of Chemistry, University College London, London, UK
- Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, UK
| | - C Richard A Catlow
- Department of Chemistry, University College London, London, UK.
- School of Chemistry, Cardiff University, Cardiff, UK.
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19
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Qin Y, Kong X, Lei D, Lei X. Facial Grinding Method for Synthesis of High-Purity CuS Nanosheets. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.7b04616] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yang Qin
- State
Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beijing 100029, China
| | - Xianggui Kong
- State
Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beijing 100029, China
| | - Deqiang Lei
- Department
of Neurosurgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Xiaodong Lei
- State
Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, P.O. Box 98, Beijing 100029, China
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20
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Wang Q, Li J, Li J. Enhanced thermoelectric performance of Cu 3SbS 4 flower-like hierarchical architectures composed of Cl doped nanoflakes via an in situ generated CuS template. Phys Chem Chem Phys 2018; 20:1460-1475. [PMID: 29256563 DOI: 10.1039/c7cp06465a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In this work, Cu3SbS4 hierarchical flower-like microspheres composed of chlorine (Cl-)-doped Cu3SbS4 nanoflakes are realized via a one pot solvothermal ion exchange reaction. The kinetic factors including the duration time, the ratio of source materials, and the KOH concentration, are systematically investigated. Using a suite of analytical techniques, including SEM, XRD and FTIR, the mechanism of the two stage in situ chemical transformation of CuS flower-like microspheres consisting of nanoflake intermediates to the target product Cu3SbS4 is elucidated. The difference in solubility between reactants and products (Ksp(CuS) > Ksp(CuSbSx)) determines that the ion-exchange reaction from transition binary to ternary metal chalcogenides is favorable under the impetus of a thermodynamic driving force. In addition, the optical and enhanced thermoelectric transport properties are investigated. The results revealed that Cl-doped Cu3SbS4 exhibited an improved power factor, which was 8 times higher than that of undoped Cu3SbS4 at 500 K. The current study not only provides a facile and economical way to synthesize high-quality Cl-doped Cu-Sb-S three dimensional (3D) hierarchical nanostructures, but also opens up a new route for preparation of other I-V-VI multicomponent chalcogenide NCs, such as Cu-Bi-S and Cu-Pb-S systems, which would be difficult to obtain otherwise.
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Affiliation(s)
- Qun Wang
- MIIT, Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, 92 West Dazhi Stree, Harbin 150001, P. R. China.
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21
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Agrawal A, Cho SH, Zandi O, Ghosh S, Johns RW, Milliron DJ. Localized Surface Plasmon Resonance in Semiconductor Nanocrystals. Chem Rev 2018; 118:3121-3207. [PMID: 29400955 DOI: 10.1021/acs.chemrev.7b00613] [Citation(s) in RCA: 280] [Impact Index Per Article: 46.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Localized surface plasmon resonance (LSPR) in semiconductor nanocrystals (NCs) that results in resonant absorption, scattering, and near field enhancement around the NC can be tuned across a wide optical spectral range from visible to far-infrared by synthetically varying doping level, and post synthetically via chemical oxidation and reduction, photochemical control, and electrochemical control. In this review, we will discuss the fundamental electromagnetic dynamics governing light matter interaction in plasmonic semiconductor NCs and the realization of various distinctive physical properties made possible by the advancement of colloidal synthesis routes to such NCs. Here, we will illustrate how free carrier dielectric properties are induced in various semiconductor materials including metal oxides, metal chalcogenides, metal nitrides, silicon, and other materials. We will highlight the applicability and limitations of the Drude model as applied to semiconductors considering the complex band structures and crystal structures that predominate and quantum effects that emerge at nonclassical sizes. We will also emphasize the impact of dopant hybridization with bands of the host lattice as well as the interplay of shape and crystal structure in determining the LSPR characteristics of semiconductor NCs. To illustrate the discussion regarding both physical and synthetic aspects of LSPR-active NCs, we will focus on metal oxides with substantial consideration also of copper chalcogenide NCs, with select examples drawn from the literature on other doped semiconductor materials. Furthermore, we will discuss the promise that LSPR in doped semiconductor NCs holds for a wide range of applications such as infrared spectroscopy, energy-saving technologies like smart windows and waste heat management, biomedical applications including therapy and imaging, and optical applications like two photon upconversion, enhanced luminesence, and infrared metasurfaces.
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Affiliation(s)
- Ankit Agrawal
- McKetta Department of Chemical Engineering , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Shin Hum Cho
- McKetta Department of Chemical Engineering , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Omid Zandi
- McKetta Department of Chemical Engineering , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Sandeep Ghosh
- McKetta Department of Chemical Engineering , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Robert W Johns
- McKetta Department of Chemical Engineering , The University of Texas at Austin , Austin , Texas 78712 , United States.,Department of Chemistry , University of California Berkeley , Berkeley , California 94720 , United States
| | - Delia J Milliron
- McKetta Department of Chemical Engineering , The University of Texas at Austin , Austin , Texas 78712 , United States
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22
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23
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Juárez-Sánchez JO, Galván DH, Posada-Amarillas A. Combined DFT and NBO approach to analyze reactivity and stability of (CuS) n (n = 1–12) clusters. COMPUT THEOR CHEM 2017. [DOI: 10.1016/j.comptc.2017.01.030] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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24
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Construction of CuS/Au Heterostructure through a Simple Photoreduction Route for Enhanced Electrochemical Hydrogen Evolution and Photocatalysis. Sci Rep 2016; 6:34738. [PMID: 27703212 PMCID: PMC5050419 DOI: 10.1038/srep34738] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 09/08/2016] [Indexed: 11/09/2022] Open
Abstract
An efficient Hydrogen evolution catalyst has been developed by decorating Au nanoparticle on the surface of CuS nanostructure following a green and environmental friendly approach. CuS nanostructure is synthesized through a simple wet-chemical route. CuS being a visible light photocatalyst is introduced to function as an efficient reducing agent. Photogenerated electron is used to reduce Au(III) on the surface of CuS to prepare CuS/Au heterostructure. The as-obtained heterostructure shows excellent performance in electrochemical H2 evolution reaction with promising durability in acidic condition, which could work as an efficient alternative for novel metals. The most efficient CuS-Au heterostructure can generate 10 mA/cm2 current density upon application of 0.179 V vs. RHE. CuS-Au heterostructure can also perform as an efficient photocatalyst for the degradation of organic pollutant. This dual nature of CuS and CuS/Au both in electrocatalysis and photocatalysis has been unveiled in this study.
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Soares AL, Dos Santos EC, Morales-García Á, Duarte HA, De Abreu HA. The Stability and Structural, Electronic and Topological Properties of Covellite (001) Surfaces. ChemistrySelect 2016. [DOI: 10.1002/slct.201600422] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Antonio L. Soares
- GPQIT.; Departamento de Química.; ICEx.; Universidade Federal de Minas Gerais.; Belo Horizonte. 31.270-901. Minas Gerais Brazil
| | - Egon C. Dos Santos
- GPQIT.; Departamento de Química.; ICEx.; Universidade Federal de Minas Gerais.; Belo Horizonte. 31.270-901. Minas Gerais Brazil
| | - Ángel Morales-García
- Department of Physical and Macromolecular Chemistry; Faculty of Science; Charles University in Prague; Hlavova 2030 128 43 Prague 2 Czech Republic
| | - Hélio A. Duarte
- GPQIT.; Departamento de Química.; ICEx.; Universidade Federal de Minas Gerais.; Belo Horizonte. 31.270-901. Minas Gerais Brazil
| | - Heitor A. De Abreu
- GPQIT.; Departamento de Química.; ICEx.; Universidade Federal de Minas Gerais.; Belo Horizonte. 31.270-901. Minas Gerais Brazil
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26
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Xu X, Bullock J, Schelhas LT, Stutz EZ, Fonseca JJ, Hettick M, Pool VL, Tai KF, Toney MF, Fang X, Javey A, Wong LH, Ager JW. Chemical Bath Deposition of p-Type Transparent, Highly Conducting (CuS)x:(ZnS)1-x Nanocomposite Thin Films and Fabrication of Si Heterojunction Solar Cells. NANO LETTERS 2016; 16:1925-1932. [PMID: 26855162 DOI: 10.1021/acs.nanolett.5b05124] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
P-type transparent conducting films of nanocrystalline (CuS)x:(ZnS)1-x were synthesized by facile and low-cost chemical bath deposition. Wide angle X-ray scattering (WAXS) and high resolution transmission electron microscopy (HRTEM) were used to evaluate the nanocomposite structure, which consists of sub-5 nm crystallites of sphalerite ZnS and covellite CuS. Film transparency can be controlled by tuning the size of the nanocrystallites, which is achieved by adjusting the concentration of the complexing agent during growth; optimal films have optical transmission above 70% in the visible range of the spectrum. The hole conductivity increases with the fraction of the covellite phase and can be as high as 1000 S cm(-1), which is higher than most reported p-type transparent materials and approaches that of n-type transparent materials such as indium tin oxide (ITO) and aluminum doped zinc oxide (AZO) synthesized at a similar temperature. Heterojunction p-(CuS)x:(ZnS)1-x/n-Si solar cells were fabricated with the nanocomposite film serving as a hole-selective contact. Under 1 sun illumination, an open circuit voltage of 535 mV was observed. This value compares favorably to other emerging heterojunction Si solar cells which use a low temperature process to fabricate the contact, such as single-walled carbon nanotube/Si (370-530 mV) and graphene/Si (360-552 mV).
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Affiliation(s)
- Xiaojie Xu
- Department of Materials Science, Fudan University , Shanghai 200438, P. R. China
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - James Bullock
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Laura T Schelhas
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory , Menlo Park, California 94025, United States
| | - Elias Z Stutz
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
- Swiss Federal Institute of Technology (EPFL) , Lausanne 1015, Switzerland
| | - Jose J Fonseca
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Mark Hettick
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Vanessa L Pool
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory , Menlo Park, California 94025, United States
| | - Kong Fai Tai
- School of Materials Science and Engineering, Nanyang Technological University , Singapore 639798
| | - Michael F Toney
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory , Menlo Park, California 94025, United States
| | - Xiaosheng Fang
- Department of Materials Science, Fudan University , Shanghai 200438, P. R. China
| | - Ali Javey
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Lydia Helena Wong
- School of Materials Science and Engineering, Nanyang Technological University , Singapore 639798
| | - Joel W Ager
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
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27
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Khalili SS, Dehghani H. Ca-doped CuS/graphene sheet nanocomposite as a highly catalytic counter electrode for improving quantum dot-sensitized solar cell performance. RSC Adv 2016. [DOI: 10.1039/c5ra24053k] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
In this study, the highest energy conversion efficiency is obtained by Ca- CuS/GS CE, corresponding to efficiency increment (70%) compared to the CuS bare CE.
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Affiliation(s)
- Seyede Sara Khalili
- Department of Inorganic Chemistry
- Faculty of Chemistry
- University of Kashan
- Kashan
- I. R. Iran
| | - Hossein Dehghani
- Department of Inorganic Chemistry
- Faculty of Chemistry
- University of Kashan
- Kashan
- I. R. Iran
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28
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Rabkin A, Friedman O, Golan Y. Surface plasmon resonance in surfactant coated copper sulfide nanoparticles: Role of the structure of the capping agent. J Colloid Interface Sci 2015; 457:43-51. [PMID: 26151566 DOI: 10.1016/j.jcis.2015.06.044] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Revised: 06/04/2015] [Accepted: 06/28/2015] [Indexed: 12/14/2022]
Abstract
HYPOTHESIS The optical properties of as-synthesized CuS nanoparticles are affected by shape, size and morphology and exhibit increased optical absorbance in the infrared range due to localized surface plasmon resonance (LSPR), which is also affected by these parameters. An additional parameter which affects the LSPR-related absorbance is crystallinity of the surfactant coating. EXPERIMENTS CuS nanoparticles with varying morphologies were synthesized using a single source, single surfactant/solvent route. Thereafter, the particles were heat treated at temperatures varying from 130 °C to 230 °C with and without protective environment. Prior to and following the treatments, the particles were characterized using various techniques. Additionally, temperature resolved structural study and thermal analysis of the surfactant coating were performed. FINDINGS We confirm that the previously reported effects of particle dimensions and chemical composition on LSPR apply for the synthesized particles. Moreover, we report an additional, previously unreported effect, connecting the crystal structure of the nanoparticle surfactant coating to LSPR. This in turn allows control over LSPR peak position by varying the degree of crystallinity of the capping surfactant layer. Thermal study of the surfactant coating showed gradual structural transition and high dependence of phase transformation on atmospheric environment during treatment.
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Affiliation(s)
- Alexander Rabkin
- Department of Materials Engineering and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Ofir Friedman
- Department of Materials Engineering and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Yuval Golan
- Department of Materials Engineering and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel.
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29
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Conejeros S, Alemany P, Llunell M, Moreira IDPR, Sánchez V, Llanos J. Electronic Structure and Magnetic Properties of CuFeS2. Inorg Chem 2015; 54:4840-9. [PMID: 25941942 DOI: 10.1021/acs.inorgchem.5b00399] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Chalcopyrite (CuFeS2) is an antiferromagnetic semiconductor with unusual magnetic and electrical properties, which are still not clearly understood. Neutron diffraction experiments reveal a phase transition at ∼50 K that has been attributed to an unexpected appearance of magnetic moments on Cu ions, having a paramagnetic arrangement down to 50 K and then ordering to an antiferromagnetic state at lower temperatures. In this study we use DFT-based computational methods to investigate the electronic structure and magnetic properties of CuFeS2 in order to obtain a reliable source of information for the interpretation of the observed magnetic behavior, and in particular to shed some light on the magnetic behavior of copper atoms in this compound. We have calculated the electronic structure of the ground and low-energy magnetically excited states and deduced a set of exchange coupling constants that are used afterward in classical Monte Carlo simulations to obtain magnetic susceptibility data, which compare successfully with our experimental results above ∼170 K. From our results it can be inferred that copper atoms remain in a diamagnetic state in this temperature range, although spin delocalization from neighboring iron atoms results in a non-negligible spin density on the copper atoms at high temperatures.
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Affiliation(s)
- Sergio Conejeros
- Departament de Quı́mica Fı́sica and Institut de Quı́mica Teòrica i Computacional (IQTCUB), Universitat de Barcelona, Diagonal 647, 08028 Barcelona, Spain
| | - Pere Alemany
- Departament de Quı́mica Fı́sica and Institut de Quı́mica Teòrica i Computacional (IQTCUB), Universitat de Barcelona, Diagonal 647, 08028 Barcelona, Spain
| | - Miquel Llunell
- Departament de Quı́mica Fı́sica and Institut de Quı́mica Teòrica i Computacional (IQTCUB), Universitat de Barcelona, Diagonal 647, 08028 Barcelona, Spain
| | - Ibério de P R Moreira
- Departament de Quı́mica Fı́sica and Institut de Quı́mica Teòrica i Computacional (IQTCUB), Universitat de Barcelona, Diagonal 647, 08028 Barcelona, Spain
| | - Víctor Sánchez
- Departamento de Quı́mica, Facultad de Ciencias, Universidad Católica del Norte, Casilla 1280, Antofagasta, Chile
| | - Jaime Llanos
- Departamento de Quı́mica, Facultad de Ciencias, Universidad Católica del Norte, Casilla 1280, Antofagasta, Chile
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30
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Martinolich AJ, Kurzman JA, Neilson JR. Polymorph selectivity of superconducting CuSe₂ through kinetic control of solid-state metathesis. J Am Chem Soc 2015; 137:3827-33. [PMID: 25746853 DOI: 10.1021/ja512520z] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Rational preparation of materials by design is a major goal of inorganic, solid-state, and materials chemists alike. Oftentimes, the use of nonmetallurgical reactions (e.g., chalcogenide fluxes, hydrothermal syntheses, and in this case solid-state metathesis) alters the thermodynamic driving force of the reaction and allows new, refractory, or otherwise energetically unfavorable materials to form under softer conditions. Taking this a step further, alteration of a metathesis reaction pathway can result in either the formation of the equilibrium marcasite polymorph (by stringent exclusion of air) or the kinetically controlled formation of the high-pressure pyrite polymorph of CuSe2 (by exposure to air). From analysis of the reaction coordinate with in situ synchrotron X-ray diffraction and pair distribution function analysis as well as differential scanning calorimetry, it is clear that the air-exposed reaction proceeds via slight, endothermic rearrangements of crystalline intermediates to form pyrite, which is attributed to partial solvation of the reaction from atmospheric humidity. In contrast, the air-free reaction proceeds via a significant exothermic process to form marcasite. Decoupling the formation of NaCl from the formation of CuSe2 enables kinetic control to be exercised over the resulting polymorph of these superconducting metal dichalcogenides.
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Affiliation(s)
- Andrew J Martinolich
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
| | - Joshua A Kurzman
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
| | - James R Neilson
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
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31
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Ramos-Cordoba E, Postils V, Salvador P. Oxidation States from Wave Function Analysis. J Chem Theory Comput 2015; 11:1501-8. [DOI: 10.1021/ct501088v] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Eloy Ramos-Cordoba
- Institut
de Química
Computacional i Catàlisi (IQCC) i Department de Química, Universitat de Girona, 17071 Girona, Spain
| | - Verònica Postils
- Institut
de Química
Computacional i Catàlisi (IQCC) i Department de Química, Universitat de Girona, 17071 Girona, Spain
| | - Pedro Salvador
- Institut
de Química
Computacional i Catàlisi (IQCC) i Department de Química, Universitat de Girona, 17071 Girona, Spain
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