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Yu H, Fang H, Jing K, Ma H, Wu L, Chai Y. Electrochromic Devices Based on 2D MoO 3-x/PEDOT:PSS Composite Film with Boosted Ion Transport. ACS APPLIED MATERIALS & INTERFACES 2024; 16:18052-18062. [PMID: 38546439 DOI: 10.1021/acsami.4c01108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Abstract
Electrochromic materials allow for optical modulation and have attracted much attention due to their bright future in applications such as smart windows and energy-saving displays. Two-dimensional (2D) molybdenum oxide nanoflakes with combined advantages of high active specific surface area and natural layered structure should be highly potential candidates for electrochromic devices. However, the efficient top-down preparation of 2D MoO3 nanoflakes is still a huge challenge and the sluggish ionic kinetics hinder its electrochromic performance. Herein, we demonstrated a feasible thiourea-assisted exfoliation procedure, which can not only increase the yield but also reduce the thickness of 2D MoO3-x nanoflakes down to a few nanometers. Furthermore, electrophoretic-deposited MoO3-x nanoflakes were combined with poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS)-conjugated polymer to simultaneously enhance the ionic kinetics and electronic conductivity, with a diffusion coefficient of 3.09 × 10-10 cm2 s-1 and a charge transport resistance of 33.7 Ω. The prepared 2D MoO3-x/PEDOT:PSS composite films exhibit improved electrochromic performance, including fast switching speed (7 s for bleaching, 5 s for coloring), enhanced coloration efficiency (87.1 cm2 C-1), and large transmittance modulation (ΔT = 65%). This study shows outstanding potential for 2D MoO3-x nanoflakes in electrochromic applications and opens new avenues for optimizing the ion transport in inorganic-organic composites, which will be possibly inspired for other electrochemical devices.
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Affiliation(s)
- Haolin Yu
- Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano), State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
| | - Huajing Fang
- Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano), State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
| | - Kai Jing
- Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano), State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
| | - Hailong Ma
- Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano), State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
| | - Lingqi Wu
- Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano), State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
| | - Yang Chai
- Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong 999077, China
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Kim H, Han G, Cho S, Woo J, Lee D. Internal Resistor Effect of Multilayer-Structured Synaptic Device for Low-Power Operation. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:201. [PMID: 38251164 PMCID: PMC11154518 DOI: 10.3390/nano14020201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Revised: 01/06/2024] [Accepted: 01/14/2024] [Indexed: 01/23/2024]
Abstract
A synaptic device with a multilayer structure is proposed to reduce the operating power of neuromorphic computing systems while maintaining a high-density integration. A simple metal-insulator-metal (MIM)-structured multilayer synaptic device is developed using an 8-inch wafer-based and complementary metal-oxide-semiconductor (CMOS) fabrication process. The three types of MIM-structured synaptic devices are compared to assess their effects on reducing the operating power. The obtained results exhibited low-power operation owing to the inserted layers acting as an internal resistor. The modulated operational conductance level and simple MIM structure demonstrate the feasibility of implementing both low-power operation and high-density integration in multilayer synaptic devices.
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Affiliation(s)
- Hyejin Kim
- Department of Electronic Materials Engineering, Kwangwoon University, Seoul 01897, Republic of Korea; (H.K.); (G.H.); (S.C.)
| | - Geonhui Han
- Department of Electronic Materials Engineering, Kwangwoon University, Seoul 01897, Republic of Korea; (H.K.); (G.H.); (S.C.)
| | - Seojin Cho
- Department of Electronic Materials Engineering, Kwangwoon University, Seoul 01897, Republic of Korea; (H.K.); (G.H.); (S.C.)
| | - Jiyong Woo
- School of Electronic and Electrical Engineering, Kyungpook National University, Daegu 41566, Republic of Korea;
| | - Daeseok Lee
- Department of Electronic Materials Engineering, Kwangwoon University, Seoul 01897, Republic of Korea; (H.K.); (G.H.); (S.C.)
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Wu W, Fang H, Wu L, Ma H, Wang H. Temperature-Dependent Electrochromic Devices for Energy-Saving Dual-Mode Displays. ACS APPLIED MATERIALS & INTERFACES 2023; 15:4113-4121. [PMID: 36642933 DOI: 10.1021/acsami.2c20394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Electrochromic (EC) devices show promising prospects with the increasing demand for energy-efficient and sustainable technologies. Multifunctionality integration is an inevitable characteristic for EC devices to adapt to changing environments. Herein, a dual-mode temperature-dependent EC device is demonstrated for the first time. Combined with the transparent PVA/EG-ZnCl2 organohydrogel electrolyte, the devices exhibit good EC performances over a wide temperature range (-40 to 40 °C). The evolutions of ion/electron transport kinetics-related indicators with temperature are further explored and simulated to reveal the mechanism of the temperature dependence of EC devices. Significantly, the optimized tungsten oxide-based EC device shows high performances at the extremely low temperature of -40 °C with a large transmittance modulation (80.8% @660 nm) and outstanding optical memory effects (97.3% retention of the initial transmittance modulation after 32 h) without electrical energy consumption. Furthermore, with a perovskite quantum dot photoluminescence film serving as the backlight, the device can switch display modes between emissive and reflective to realize its functionality in bright or dark conditions. This work provides a broad application prospect for EC devices in diverse environments of light (bright/dark) and temperature (hot/cold).
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Affiliation(s)
- Wenting Wu
- State Key Laboratory for Mechanical Behavior of Materials, School of Material Science and Engineering, Xi'an Jiaotong University, Xi'an710049, China
| | - Huajing Fang
- State Key Laboratory for Mechanical Behavior of Materials, School of Material Science and Engineering, Xi'an Jiaotong University, Xi'an710049, China
- Guangdong Provisional Key Laboratory of Functional Oxide Materials and Devices, Southern University of Science and Technology, Shenzhen518055, China
| | - Lingqi Wu
- State Key Laboratory for Mechanical Behavior of Materials, School of Material Science and Engineering, Xi'an Jiaotong University, Xi'an710049, China
| | - Hailong Ma
- State Key Laboratory for Mechanical Behavior of Materials, School of Material Science and Engineering, Xi'an Jiaotong University, Xi'an710049, China
| | - Hong Wang
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen518055, China
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MOFs-derived hierarchical porous carbon confining the monodisperse Ni and defective WOx for efficient and stable hydrogenolysis of cellulose to ethylene glycol. RESEARCH ON CHEMICAL INTERMEDIATES 2022. [DOI: 10.1007/s11164-022-04718-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Shandilya P, Sambyal S, Sharma R, Mandyal P, Fang B. Properties, optimized morphologies, and advanced strategies for photocatalytic applications of WO 3 based photocatalysts. JOURNAL OF HAZARDOUS MATERIALS 2022; 428:128218. [PMID: 35030486 DOI: 10.1016/j.jhazmat.2022.128218] [Citation(s) in RCA: 50] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 12/18/2021] [Accepted: 01/03/2022] [Indexed: 05/23/2023]
Abstract
The development of WO3 based photocatalysts has gained considerable attention across the world, especially in the realm of environmental remediation and energy production. WO3 has a band gap of 2.5- 2.7 eV that falls under the visible region and is thus a potential candidate to utilize in various photocatalytic processes. As an earth-abundant metal oxide, WO3 discovered in 1976 displayed excellent electronic and morphological properties, good stability, and enhanced photoactivity with diverse crystal phases. Also, it unveils non-toxicity, high stability in drastic conditions, biocompatibility, low cost, excellent hole mobility (10 cm2 V-1s-1), and tunable band gap. This review provides a comprehensive overview of the different properties of WO3 inclusive of crystallographic, electrical, optical, thermoelectrical, and ferroelectric properties. The different morphologies of WO3 based on dimensions were obtained by adopting different fabrication methods including inspecting their effects on the efficiency of WO3. Numerous strategies to construct an ideal photocatalyst such as engineering crystal facets, surface defects, doping, heterojunction formation explaining specifically type-II, Z-scheme, and S-scheme mechanisms with addition to carbonaceous based WO3 nanocomposites are summed up to explore the photocatalytic performance. The typical application of WO3 is deliberated in detail involving the role and efficiency of WO3 in pollutant degradation, CO2 photoreduction, and water splitting. Besides, other applications of WO3 as gas-sensor, bio-sensor, decomposition of VOCs, heavy metals ions adsorption, and antimicrobial property are also included. Moreover, the numerous aspects responsible for the high efficiency of WO3-based nanocomposites with their challenges, opportunities, and future aspects are summarized. Hopefully, this review may inspire researchers to explore new ideas to boost the production of clean energy for the next generation.
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Affiliation(s)
- Pooja Shandilya
- School of Advanced Chemical Sciences, Shoolini University, Solan, HP 173229, India.
| | - Shabnam Sambyal
- School of Advanced Chemical Sciences, Shoolini University, Solan, HP 173229, India
| | - Rohit Sharma
- School of Advanced Chemical Sciences, Shoolini University, Solan, HP 173229, India
| | - Parteek Mandyal
- School of Advanced Chemical Sciences, Shoolini University, Solan, HP 173229, India
| | - Baizeng Fang
- Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC V6P 1Z3, Canada.
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Prakash O, Saxena V, Bedi R, Debnath A, Mahajan A. Solution processable transition metal oxide ultra-thin films as alternative electron transport and hole blocking layers in dye sensitized solar cells. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113385] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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7
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Tran Huu H, Vu NH, Ha H, Moon J, Kim HY, Im WB. Sub-micro droplet reactors for green synthesis of Li 3VO 4 anode materials in lithium ion batteries. Nat Commun 2021; 12:3081. [PMID: 34035270 PMCID: PMC8149873 DOI: 10.1038/s41467-021-23366-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Accepted: 04/21/2021] [Indexed: 02/04/2023] Open
Abstract
The conventional solid-state reaction suffers from low diffusivity, high energy consumption, and uncontrolled morphology. These limitations are competed by the presence of water in solution route reaction. Herein, based on concept of combining above methods, we report a facile solid-state reaction conducted in water vapor at low temperature along with calcium doping for modifying lithium vanadate as anode material for lithium-ion batteries. The optimized material, delivers a superior specific capacity of 543.1, 477.1, and 337.2 mAh g-1 after 200 and 1000 cycles at current densities of 100, 1000 and 4000 mA g-1, respectively, which is attributed to the contribution of pseudocapacitance. In this work, we also use experimental and theoretical calculation to demonstrate that the enhancement of doped lithium vanadate is attributed to particles confinement of droplets in water vapor along with the surface and structure variation of calcium doping effect.
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Affiliation(s)
- Ha Tran Huu
- Division of Materials Science and Engineering, Hanyang University, Seoul, Republic of Korea
| | - Ngoc Hung Vu
- Faculty of Biotechnology, Chemistry and Environmental Engineering, Phenikaa University, Hanoi, Vietnam
- Phenikaa Research and Technology Institute, A&A Green Phoenix Group, Hanoi, Vietnam
| | - Hyunwoo Ha
- Department of Materials Science and Engineering, Chungnam National University, Daejeon, Korea
| | - Joonhee Moon
- Advanced Nano-Surface Research Group, Korea Basic Science Institute, Daejeon, Republic of Korea
| | - Hyun You Kim
- Department of Materials Science and Engineering, Chungnam National University, Daejeon, Korea
| | - Won Bin Im
- Division of Materials Science and Engineering, Hanyang University, Seoul, Republic of Korea.
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Omrani N, Nezamzadeh-Ejhieh A. A novel quadripartite Cu2O-CdS-BiVO4-WO3 visible-light driven photocatalyst: Brief characterization and study the kinetic of the photodegradation and mineralization of sulfasalazine. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112726] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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9
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Wang H, Xin H, Cai C, Zhu C, Xiu Z, Liu Q, Weng Y, Wang C, Zhang X, Liu S, Peng Z, Ma L. Selective C 3-C 4 Keto-Alcohol Production from Cellulose Hydrogenolysis over Ni-WO x/C Catalysts. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02375] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Haiyong Wang
- Chinese Academy of Sciences, Guangzhou Institute of Energy Conversion, Guangzhou 510640, P. R. China
- CAS Key Laboratory of Renewable Energy, Guangzhou 510640, P. R. China
- Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, P. R. China
| | - Haosheng Xin
- Chinese Academy of Sciences, Guangzhou Institute of Energy Conversion, Guangzhou 510640, P. R. China
- CAS Key Laboratory of Renewable Energy, Guangzhou 510640, P. R. China
- Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Chiliu Cai
- Chinese Academy of Sciences, Guangzhou Institute of Energy Conversion, Guangzhou 510640, P. R. China
- CAS Key Laboratory of Renewable Energy, Guangzhou 510640, P. R. China
- Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, P. R. China
| | - Changhui Zhu
- Chinese Academy of Sciences, Guangzhou Institute of Energy Conversion, Guangzhou 510640, P. R. China
- CAS Key Laboratory of Renewable Energy, Guangzhou 510640, P. R. China
- Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Zhongxun Xiu
- Chinese Academy of Sciences, Guangzhou Institute of Energy Conversion, Guangzhou 510640, P. R. China
- CAS Key Laboratory of Renewable Energy, Guangzhou 510640, P. R. China
- Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, P. R. China
- University of Science and Technology of China, Hefei 230026, P. R. China
| | - Qiying Liu
- Chinese Academy of Sciences, Guangzhou Institute of Energy Conversion, Guangzhou 510640, P. R. China
- CAS Key Laboratory of Renewable Energy, Guangzhou 510640, P. R. China
- Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, P. R. China
- Dalian National Laboratory for Clean Energy, Dalian 116023, P. R. China
| | - Yujing Weng
- Chinese Academy of Sciences, Guangzhou Institute of Energy Conversion, Guangzhou 510640, P. R. China
- CAS Key Laboratory of Renewable Energy, Guangzhou 510640, P. R. China
- Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, P. R. China
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo 454000, P. R. China
| | - Chenguang Wang
- Chinese Academy of Sciences, Guangzhou Institute of Energy Conversion, Guangzhou 510640, P. R. China
- CAS Key Laboratory of Renewable Energy, Guangzhou 510640, P. R. China
- Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, P. R. China
| | - Xinghua Zhang
- Chinese Academy of Sciences, Guangzhou Institute of Energy Conversion, Guangzhou 510640, P. R. China
- CAS Key Laboratory of Renewable Energy, Guangzhou 510640, P. R. China
- Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, P. R. China
| | - Shijun Liu
- Chinese Academy of Sciences, Guangzhou Institute of Energy Conversion, Guangzhou 510640, P. R. China
- CAS Key Laboratory of Renewable Energy, Guangzhou 510640, P. R. China
- Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, P. R. China
| | - Zifang Peng
- Chinese Academy of Sciences, Guangzhou Institute of Energy Conversion, Guangzhou 510640, P. R. China
- CAS Key Laboratory of Renewable Energy, Guangzhou 510640, P. R. China
- Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, P. R. China
| | - Longlong Ma
- Chinese Academy of Sciences, Guangzhou Institute of Energy Conversion, Guangzhou 510640, P. R. China
- CAS Key Laboratory of Renewable Energy, Guangzhou 510640, P. R. China
- Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, P. R. China
- University of Science and Technology of China, Hefei 230026, P. R. China
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10
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Kebede WL, Kuo DH, Ahmed KE, Abdullah H. Dye degradation over the multivalent charge- and solid solution-type n-MoS2/p-WO3 based diode catalyst under dark condition with a self-supporting charge carrier transfer mechanism. ADV POWDER TECHNOL 2020. [DOI: 10.1016/j.apt.2020.04.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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11
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Chatterjee A, Or SW. Metal–organic framework-derived MnO/CoMn2O4@N–C nanorods with nanoparticle interstitial decoration in core@shell structure as improved bifunctional electrocatalytic cathodes for Li–O2 batteries. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.135809] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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12
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Omrani N, Nezamzadeh-Ejhieh A. A comprehensive study on the enhanced photocatalytic activity of Cu2O/BiVO4/WO3 nanoparticles. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2019.112223] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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13
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Prakash O, Saxena V, Choudhury S, Tanvi, Singh A, Debnath A, Mahajan A, Muthe K, Aswal D. Low temperature processable ultra-thin WO3 Langmuir-Blodgett film as excellent hole blocking layer for enhanced performance in dye sensitized solar cell. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.06.047] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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14
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Sharma L, Kumar P, Halder A. Phase and Vacancy Modulation in Tungsten Oxide: Electrochemical Hydrogen Evolution. ChemElectroChem 2019. [DOI: 10.1002/celc.201900666] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Lalita Sharma
- School of Basic SciencesIndian Institute of Technology Mandi Himachal Pradesh India 175005
| | - Pawan Kumar
- School of EngeeneringIndian Institute of Technology Mandi, Himachal Pradesh India 175005
| | - Aditi Halder
- School of Basic SciencesIndian Institute of Technology Mandi Himachal Pradesh India 175005
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15
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Rayón-López N, Martínez-Casillas DC, Miranda-Hernández M, Villafán-Vidales HI, Rodríguez-López JL, Menchaca-Campos EC, Cuentas-Gallegos AK. High-temperature tungsten trioxides obtained by concentrated solar energy: physicochemical and electrochemical characterization. J Solid State Electrochem 2018. [DOI: 10.1007/s10008-018-04167-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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Hasani A, Le QV, Nguyen TP, Choi KS, Sohn W, Jang HW, Kim SY. A thorough study on electrochromic properties of metal doped tungsten trioxide film prepared by a facile solution process. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.07.050] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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17
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Palanisamy G, Bhuvaneswari K, Bharathi G, Nataraj D, Pazhanivel T. Enhanced Photocatalytic Properties of ZnS-WO3
Nanosheet Hybrid under Visible Light Irradiation. ChemistrySelect 2018. [DOI: 10.1002/slct.201801688] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | | | - Ganapathi Bharathi
- Department of Physics; Bharathiar University; Coimbatore-641 046, Tamil Nadu India
| | - Devaraj Nataraj
- Department of Physics; Bharathiar University; Coimbatore-641 046, Tamil Nadu India
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18
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Sarma PV, Tiwary CS, Radhakrishnan S, Ajayan PM, Shaijumon MM. Oxygen incorporated WS 2 nanoclusters with superior electrocatalytic properties for hydrogen evolution reaction. NANOSCALE 2018; 10:9516-9524. [PMID: 29737994 DOI: 10.1039/c8nr00253c] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Transition metal dichalcogenides (TMDs) exhibit unique properties and show potential for promising applications in energy conversion. Mono/few-layered TMDs have been widely explored as active electrocatalysts for the hydrogen evolution reaction (HER). A controlled synthesis of TMD nanostructures with unique structural and electronic properties, leading to highly active sites or higher conductivity, is essential to achieve enhanced HER activity. Here, we demonstrate a new approach to controllably synthesize highly catalytically active oxygen-incorporated 1T and 2H WS2 nanoclusters from oxygen deficient WO3 nanorods, following chemical exfoliation and ultrasonication processes, respectively. The as-synthesized 1T nanoclusters, with unique properties of tailored edge sites, and enhanced conductivity resulting from the metallic 1T phase and oxygen incorporation, have been identified as highly active and promising electrocatalysts for the HER, with a very low Tafel slope of 47 mV per decade and a low onset overpotential of 88 mV, along with exceptionally high exchange current density and very good stability. The study could be extended to other TMD materials for potential applications in energy conversion and storage.
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Affiliation(s)
- Prasad V Sarma
- School of Physics, Indian Institute of Science Education and Research Thiruvananthapuram, Maruthamala PO, Thiruvananthapuram, Kerala 695551, India.
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Kim JK, Cho Y, Jeong MJ, Levy-Wendt B, Shin D, Yi Y, Wang DH, Zheng X, Park JH. Rapid Formation of a Disordered Layer on Monoclinic BiVO 4 : Co-Catalyst-Free Photoelectrochemical Solar Water Splitting. CHEMSUSCHEM 2018; 11:933-940. [PMID: 29274301 DOI: 10.1002/cssc.201702173] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 12/20/2017] [Indexed: 05/08/2023]
Abstract
A surface disordered layer is a plausible approach to improve the photoelectrochemical performance of TiO2 . However, the formation of a crystalline disordered layer in BiVO4 and its effectiveness towards photoelectrochemical water splitting has remained a big challenge. Here, we report a rapid solution process (within 5 s) that is able to form a disordered layer of a few nanometers thick on the surface of BiVO4 nanoparticles using a specific solution with a controllable reducing power. The disordered layer on BiVO4 alleviates charge recombination at the electrode-electrolyte interface and reduces the onset potential greatly, which in turn results in a photocurrent density of approximately 2.3 mA cm-2 at 1.23 V versus the reversible hydrogen electrode (RHE). This value is 2.1 times higher than that of bare BiVO4 . The enhanced photoactivity is attributed to the increased charge separation and transfer efficiencies, which resolve the intrinsic drawbacks of bare BiVO4 such as the short hole diffusion length of around 100 nm and poor surface oxygen evolution reactivity.
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Affiliation(s)
- Jung Kyu Kim
- School of Chemical Engineering, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon, 16419, Republic of Korea
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Yoonjun Cho
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Myung Jin Jeong
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Ben Levy-Wendt
- Department of Mechanical Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Dongguen Shin
- Institute of Physics and Applied Physics, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Yeonjin Yi
- Institute of Physics and Applied Physics, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Dong Hwan Wang
- School of Integrative Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 156-756, Republic of Korea
| | - Xiaolin Zheng
- Department of Mechanical Engineering, Stanford University, Stanford, CA, 94305, USA
| | - Jong Hyeok Park
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
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Khan H, Zavabeti A, Wang Y, Harrison CJ, Carey BJ, Mohiuddin M, Chrimes AF, De Castro IA, Zhang BY, Sabri YM, Bhargava SK, Ou JZ, Daeneke T, Russo SP, Li Y, Kalantar-Zadeh K. Quasi physisorptive two dimensional tungsten oxide nanosheets with extraordinary sensitivity and selectivity to NO 2. NANOSCALE 2017; 9:19162-19175. [PMID: 29186236 DOI: 10.1039/c7nr05403c] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Attributing to their distinct thickness and surface dependent physicochemical properties, two dimensional (2D) nanostructures have become an area of increasing interest for interfacial interactions. Effectively, properties such as high surface-to-volume ratio, modulated surface activities and increased control of oxygen vacancies make these types of materials particularly suitable for gas-sensing applications. This work reports a facile wet-chemical synthesis of 2D tungsten oxide nanosheets by sonication of tungsten particles in an acidic environment and thermal annealing thereafter. The resultant product of large nanosheets with intrinsic substoichiometric properties is shown to be highly sensitive and selective to nitrogen dioxide (NO2) gas, which is a major pollutant. The strong synergy between polar NO2 molecules and tungsten oxide surface and also abundance of active surface sites on the nanosheets for molecule interactions contribute to the exceptionally sensitive and selective response. An extraordinary response factor of ∼30 is demonstrated to ultralow 40 parts per billion (ppb) NO2 at a relatively low operating temperature of 150 °C, within the physisorption temperature band for tungsten oxide. Selectivity to NO2 is demonstrated and the theory behind it is discussed. The structural, morphological and compositional characteristics of the synthesised and annealed materials are extensively characterised and electronic band structures are proposed. The demonstrated 2D tungsten oxide based sensing device holds the greatest promise for producing future commercial low-cost, sensitive and selective NO2 gas sensors.
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Affiliation(s)
- Hareem Khan
- School of Engineering, RMIT University, 124 La Trobe Street, Melbourne, Victoria 3000, Australia.
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21
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Mardolkar SD, Salker AV. Efficiently synthesized Co doped Cu3TeO6 accounted for its anomalous behaviour in electronic properties. NEW J CHEM 2017. [DOI: 10.1039/c7nj02981k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Efficient synthesis of Cu3−xCoxTeO6 (x = 0.0, 0.1, 0.3 or 0.5) yields cubic morphologies, which exhibit remarkable electronic and enhanced permittivity properties.
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Affiliation(s)
| | - A. V. Salker
- Department of Chemistry
- Goa University
- Taleigao Plateau
- Goa
- India
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22
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Li T, He J, Peña B, Berlinguette CP. Curing BiVO4
Photoanodes with Ultraviolet Light Enhances Photoelectrocatalysis. Angew Chem Int Ed Engl 2015; 55:1769-72. [DOI: 10.1002/anie.201509567] [Citation(s) in RCA: 113] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Revised: 11/07/2015] [Indexed: 12/21/2022]
Affiliation(s)
- Tengfei Li
- Departments of Chemistry and Chemical & Biological Engineering; The University of British Columbia; 2036 Main Mall Vancouver BC V6T1Z1 Canada
| | - Jingfu He
- Departments of Chemistry and Chemical & Biological Engineering; The University of British Columbia; 2036 Main Mall Vancouver BC V6T1Z1 Canada
| | - Bruno Peña
- Departments of Chemistry and Chemical & Biological Engineering; The University of British Columbia; 2036 Main Mall Vancouver BC V6T1Z1 Canada
| | - Curtis P. Berlinguette
- Departments of Chemistry and Chemical & Biological Engineering; The University of British Columbia; 2036 Main Mall Vancouver BC V6T1Z1 Canada
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23
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Li T, He J, Peña B, Berlinguette CP. Curing BiVO4
Photoanodes with Ultraviolet Light Enhances Photoelectrocatalysis. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201509567] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Tengfei Li
- Departments of Chemistry and Chemical & Biological Engineering; The University of British Columbia; 2036 Main Mall Vancouver BC V6T1Z1 Canada
| | - Jingfu He
- Departments of Chemistry and Chemical & Biological Engineering; The University of British Columbia; 2036 Main Mall Vancouver BC V6T1Z1 Canada
| | - Bruno Peña
- Departments of Chemistry and Chemical & Biological Engineering; The University of British Columbia; 2036 Main Mall Vancouver BC V6T1Z1 Canada
| | - Curtis P. Berlinguette
- Departments of Chemistry and Chemical & Biological Engineering; The University of British Columbia; 2036 Main Mall Vancouver BC V6T1Z1 Canada
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