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Shi Z, Yu G, Li J, Jia Z, Zhang X, Lin CT, Lin Q, Chen Z, Tsai HS. Facile preparation of Hf 3N 4 thin films directly used as electrodes for lithium-ion storage. NANOSCALE HORIZONS 2024. [PMID: 39264363 DOI: 10.1039/d4nh00406j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/13/2024]
Abstract
Transition-metal nitride thin-film electrodes are potential electrode materials for all-solid-state thin-film lithium-ion batteries. In this study, orthorhombic Hf3N4 thin-film electrodes applied in lithium-ion batteries were fabricated by the magnetron sputtering deposition of Hf followed by N2 plasma immersion and post-annealing for the first time. This electrode material without additives such as binders and conductive agents exhibited a high specific capacity, high cycling stability, and excellent rate performance. At a current density of 0.1 A g-1, the initial discharge capacity was 583.2 mA h g-1 and the stable Coulombic efficiency was 96.6%. At a high current density of 2 A g-1, the Hf3N4 thin-film electrodes could still provide a stable discharge capacity of about 260 mA h g-1 and Coulombic efficiency close to 100%. By analyzing the cyclic voltammetry curves at different scan rates, it was found that the Li+ storage in Hf3N4 thin-film electrodes was mainly contributed by a pseudo-capacitance mechanism.
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Affiliation(s)
- Zhengguang Shi
- School of Physics, Harbin Institute of Technology, 150001, Harbin, China.
- Laboratory for Space Environment and Physical Sciences, Harbin Institute of Technology, 150001, Harbin, China
| | - Geng Yu
- School of Physics, Harbin Institute of Technology, 150001, Harbin, China.
- Laboratory for Space Environment and Physical Sciences, Harbin Institute of Technology, 150001, Harbin, China
| | - Jing Li
- School of Physics, Harbin Institute of Technology, 150001, Harbin, China.
- Laboratory for Space Environment and Physical Sciences, Harbin Institute of Technology, 150001, Harbin, China
| | - Zhenggang Jia
- School of Materials Science and Engineering, Harbin Institute of Technology, 150001, Harbin, China
| | - Xuexi Zhang
- School of Materials Science and Engineering, Harbin Institute of Technology, 150001, Harbin, China
| | - Cheng-Te Lin
- Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, 315201, Ningbo, China
| | - Qianru Lin
- Laboratory for Space Environment and Physical Sciences, Harbin Institute of Technology, 150001, Harbin, China
| | - Zhaoyu Chen
- Laboratory for Space Environment and Physical Sciences, Harbin Institute of Technology, 150001, Harbin, China
| | - Hsu-Sheng Tsai
- School of Physics, Harbin Institute of Technology, 150001, Harbin, China.
- Laboratory for Space Environment and Physical Sciences, Harbin Institute of Technology, 150001, Harbin, China
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Yang CM, Wei CH, Chang JY, Lai CS. Flexible and Disposable Hafnium Nitride Extended Gates Fabricated by Low-Temperature High-Power Impulse Magnetron Sputtering. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:1191. [PMID: 39057868 PMCID: PMC11279940 DOI: 10.3390/nano14141191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2024] [Revised: 07/02/2024] [Accepted: 07/11/2024] [Indexed: 07/28/2024]
Abstract
To obtain a high-performance extended gate field-effect transistor for pH detection, hafnium nitride (HfN) was first fabricated on an indium tin oxide on polyethylene terephthalate (ITO/PET) substrate using a high-power impulse magnetron sputter system (HiPIMS) in this study. It can be easily applied in biomedical diagnostic and environmental monitoring applications with the advantages of flexible, disposable, cost-effective, and reliable components. Various duty cycle conditions in HiPIMSs were designed to investigate the corresponding sensing performance and material properties including surface morphology and composition. As the duty cycle increased, the grain size of HfN increased. Additionally, X-ray photoelectron spectroscopy (XPS) analysis illustrated the presence of HfOxNy on the deposited HfN surface. Both behaviors could result in a better pH sensing performance based on the theory of the site-binding model. Subsequently, HfN with a 15% duty cycle exhibited excellent pH sensitivity and linearity, with values of 59.3 mV/pH and 99.8%, respectively; its hysteresis width and drift coefficient were -1 mV and 0.5 mV/h, respectively. Furthermore, this pH-sensing performance remained stable even after 2000 repeated bending cycles. These results indicate the potential and feasibility of this HiPIMS-deposited HfN for future wearable chemical applications.
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Affiliation(s)
- Chia-Ming Yang
- Department of Electronic Engineering, Chang Gung University, Taoyuan City 33303, Taiwan; (C.-H.W.); (J.-Y.C.)
- Institute of Electro-Optical Engineering, Chang Gung University, Taoyuan City 33303, Taiwan
- Department of Neurosurgery, Chang Gung Memorial Hospital at Linkou, Taoyuan City 33303, Taiwan
- Department of Materials Engineering, Ming Chi University of Technology, New Taipei City 243303, Taiwan
- Department of Electronics Engineering, Ming Chi University of Technology, New Taipei City 243303, Taiwan
| | - Chao-Hui Wei
- Department of Electronic Engineering, Chang Gung University, Taoyuan City 33303, Taiwan; (C.-H.W.); (J.-Y.C.)
| | - Jia-Yuan Chang
- Department of Electronic Engineering, Chang Gung University, Taoyuan City 33303, Taiwan; (C.-H.W.); (J.-Y.C.)
| | - Chao-Sung Lai
- Department of Electronic Engineering, Chang Gung University, Taoyuan City 33303, Taiwan; (C.-H.W.); (J.-Y.C.)
- Department of Materials Engineering, Ming Chi University of Technology, New Taipei City 243303, Taiwan
- Department of Nephrology, Chang Gung Memorial Hospital at Linkou, Taoyuan City 33303, Taiwan
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Murugesan V, Rathinam B. Curcumin-Assisted Synthesis of MoS 2 Nanoparticles as an Electron Transport Material in Perovskite Solar Cells. MICROMACHINES 2024; 15:840. [PMID: 39064351 PMCID: PMC11278733 DOI: 10.3390/mi15070840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2024] [Revised: 06/25/2024] [Accepted: 06/27/2024] [Indexed: 07/28/2024]
Abstract
Recently, two-dimensional (2D) transition metal dichalcogenides (2D TMDs), such as molybdenum sulfide (MoS2) and molybdenum selenide (MoSe2), have been presented as effective materials for extracting the generated holes from perovskite layers. Thus, the work function of MoS2 can be tuned in a wide range from 3.5 to 4.8 eV by adjusting the number of layers, chemical composition, elemental doping, surface functionalization, and surface states, depending on the synthetic approach. In this proposed work, we attempt to synthesize MoS2 nanoparticles (NPs) from bulk MoS2 using two steps: (1) initial exfoliation of bulk MoS2 into few-layer MoS2 by using curcumin-cholesteryl-derived organogels (BCC-ED) and curcumin solution in ethylene diamine (C-ED) under sonication; (2) ultrasonication of the subsequently obtained few-layer MoS2 at 60-80 °C, followed by washing of the above chemicals. The initial treatment with the BCC-ED/C-ED undergoes exfoliation of bulk MoS2 resulted in few-layer MoS2, as evidenced by the morphological analysis using SEM. Further thinning or reduction of the size of the few-layer MoS2 by prolonged ultrasonication at 60-80 °C, followed by repeated washing with DMF, resulted in uniform nanoparticles (MoS2 NPs) with a size of ~10 nm, as evidenced by morphological analysis. Since BCC-ED and C-ED produced similar results, C-ED was utilized for further production of NPs over BCC-ED owing to the ease of removal of curcumin from the MoS2 NPs. Utilization of the above synthesized MoS2 NPs as an ETL layer in the cell structure FTO/ETL/perovskite absorber/spiro-OMeTAD/Ag enhanced the efficiency significantly. The results showed that MoS2 NPs as an ETL exhibited a power conversion efficiency (PEC) of 11.46%, a short-circuit current density of 18.65 mA/cm2, an open-circuit voltage of 1.05 V, and a fill factor of 58.66%, at the relative humidity of 70 ± 10% (open-air conditions) than that of the ED-treated MoS2 devices without curcumin. These results suggest that the synergistic effect of both curcumin and ED plays a critical role in obtaining high-quality MoS2 NPs, beneficial for efficient charge transport, lowering the crystal defect density/trap sites and reducing the charge recombination rate, thus, significantly enhancing the efficiency.
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Affiliation(s)
- Vajjiravel Murugesan
- Department of Chemistry, School of Physical and Chemical Sciences, B S Abdur Rahman Crescent Institute of Science and Technology, Chennai 600048, India;
| | - Balamurugan Rathinam
- Department of Chemical and Materials Engineering, National Yunlin University of Science and Technology, 123 University Road, Section 3, Douliu, Yunlin 64002, Taiwan
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Duan D, Huo J, Chen J, Chi B, Chen Z, Sun S, Zhao Y, Zhao H, Cui Z, Liao S. Hf and Co Dual Single Atoms Co-Doped Carbon Catalyst Enhance the Oxygen Reduction Performance. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2310491. [PMID: 38189624 DOI: 10.1002/smll.202310491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 12/20/2023] [Indexed: 01/09/2024]
Abstract
Single-atom metal-doped M-N-C (M═Fe, Co, Mn, or Ni) catalysts exhibit excellent catalytic activity toward oxygen reduction reactions (ORR). However, their performance still has a large gap considering the demand for their practical applications. This study reports a high-performance dual single-atom doped carbon catalyst (HfCo-N-C), which is prepared by pyrolyzing Co and Hf co-doped ZIF-8 . Co and Hf are atomically dispersed in the carbon framework and coordinated with N to form Co-N4 and Hf-N4 active moieties. The synergetic effect between Co-N4 and Hf-N4 significantly enhance the catalytic activity and durability of the catalyst. In an acidic medium, the ORR half-wave potential (E1/2) of the catalyst is up to 0.82 V , which is much higher than that of the Co-N-C catalyst without Hf co-doping (0.80 V). The kinetic current density of the catalyst is up to 2.49 A cm-2 at 0.85 V , which is 1.74 times that of the Co-N-C catalyst without Hf co-doping. Moreover, the catalyst exhibits excellent cathodic performance in single proton exchange membrane fuel cells and Zn-air batteries. Furthermore, Hf co-doping can effectively suppress the formation of H2O2, resulting in significantly improved stability and durability.
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Affiliation(s)
- Diancheng Duan
- The Key Laboratory of Fuel Cell Technology of Guangdong Province & The Key Laboratory of New Energy, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Junlang Huo
- The Key Laboratory of Fuel Cell Technology of Guangdong Province & The Key Laboratory of New Energy, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Jiaxiang Chen
- The Key Laboratory of Fuel Cell Technology of Guangdong Province & The Key Laboratory of New Energy, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Bin Chi
- The Key Laboratory of Fuel Cell Technology of Guangdong Province & The Key Laboratory of New Energy, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Zhangsen Chen
- Centre Énergie, Matériaux et Télécommunications, Institute National de la Recherche Scientifique, Varennes, Québec, J3X 1P7, Canada
| | - Shuhui Sun
- Centre Énergie, Matériaux et Télécommunications, Institute National de la Recherche Scientifique, Varennes, Québec, J3X 1P7, Canada
| | - Yang Zhao
- Dalian National Laboratory for Clean Energy (DNL), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, P. R. China
| | - He Zhao
- The Key Laboratory of Fuel Cell Technology of Guangdong Province & The Key Laboratory of New Energy, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China
- School of Chemistry and Chemical Engineering, Dalian University of Technology, Dalian, 116024, China
| | - Zhiming Cui
- The Key Laboratory of Fuel Cell Technology of Guangdong Province & The Key Laboratory of New Energy, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Shijun Liao
- The Key Laboratory of Fuel Cell Technology of Guangdong Province & The Key Laboratory of New Energy, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China
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In-Situ Monitoring the SERS Spectra of para-Aminothiophenol Adsorbed on Plasmon-Tunable Au@Ag Core–Shell Nanostars. NANOMATERIALS 2022; 12:nano12071156. [PMID: 35407274 PMCID: PMC9000786 DOI: 10.3390/nano12071156] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 03/26/2022] [Accepted: 03/28/2022] [Indexed: 02/04/2023]
Abstract
Plasmon-induced photocatalysis on noble metal surfaces has attracted broad attention due to its application in sunlight energy conversion, while the selectivity of plasmonic platforms remains unclear. Herein, we present the controlled plasmon-mediated oxidation of para-aminothiophenol (p-ATP) by employing Au@Ag core–shell nanostars with tunable tip plasmons in visible–near-infrared range as reactors. In-situ Raman measurements indicate that Au@Ag core–shell nanostars essentially promote the conversion of p-ATP to 4,4′-dimercaptoazobenzene (DMAB) due to hot carriers excited by localized surface plasmon resonance. Au@Ag nanostars with plasmon modes under resonant light excitation suggested higher catalytic efficiency, as evidenced by the larger intensity ratios between 1440 cm−1 (N=N stretching of DMAB) and 1080 cm−1 shifts (C–S stretching of p-ATP). Importantly, the time-dependent surface-enhanced Raman scattering spectra showed that the conversion efficiency of p-ATP was mainly dictated by the resonance condition between the tip plasmon mode of Au@Ag core–shell nanostars and the excitation light, as well as the choice of excitation wavelength. These results show that plasmon bands of metal nanostructures play an important role in the efficiency of plasmon-driven photocatalysis.
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