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Baraily M, Baro B, Boruah R, Bayan S. PVDF-HFP encapsulated WS 2nanosheets in droplet-based triboelectric nanogenerators for possible detection of human Na +/K +ion concentration. NANOTECHNOLOGY 2024; 35:365502. [PMID: 38861959 DOI: 10.1088/1361-6528/ad5684] [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: 04/08/2024] [Accepted: 06/11/2024] [Indexed: 06/13/2024]
Abstract
Here we report the liquid-solid interaction in droplet-based triboelectric nanogenerators (TENG) for estimation of human Na+/K+levels. The exploitation of PVDF-HFP encapsulated WS2as active layer in the droplet-based TENG (DTENG) leads to the generation of electrical signal during the impact of water droplet. Comparison over the control devices indicates that surface quality and dielectric nature of the PVDF-HFP/WS2composite largely dictates the performance of the DTENG. The demonstration of excellent sensitivity of the DTENG towards water quality indicates its promising application towards water testing. In addition, the alteration in output signal with slightest variation in ionic concentration (Na+or K+) in water has been witnessed and is interpreted with charge transfer and ion transfer processes during liquid-solid interaction. The study reveals that the ion mobility largely affects the ion adsorption process on the active layer of PVDF-HFP/WS2and thus generates distinct output profiles for diverse ions like Na+and K+. Following that, the DTENG characteristics have been exploited to artificial urine where the varying output signals have been recorded for variation in urinary Na+ion concentration. Therefore, the deployment of PVDF-HFP/WS2in DTENG holds promising application towards the analyse of ionic characteristics of body fluids.
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Affiliation(s)
- Madhav Baraily
- Department of Physics, Rajiv Gandhi University, Doimukh, Arunachal Pradesh 791112, India
| | - Bikash Baro
- Department of Physics, Rajiv Gandhi University, Doimukh, Arunachal Pradesh 791112, India
| | - Ratan Boruah
- Sophisticated Analytical Instrumentation Centre, Tezpur University, Tezpur, Assam 782028, India
| | - Sayan Bayan
- Department of Physics, Rajiv Gandhi University, Doimukh, Arunachal Pradesh 791112, India
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2
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Chen Z, Lu Y, Hong R, Liang Z, Wen L, Liu X, Liu Q. Recent Progress of Solid-Liquid Interface-Mediated Contact-Electro-Catalysis. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:5557-5570. [PMID: 38465803 DOI: 10.1021/acs.langmuir.3c03411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
Contact electrification (CE) is a common physical process by which triboelectric charges are generated through the mutual contact between two objects. Despite the ongoing debates on CE's mechanism, recent advancements in technology have elucidated the primary role of electron transfer in most CE processes. This discovery leads to the spawning of an emerging field, known as contact-electro-catalysis (CEC), which utilizes the electron transfer phenomenon during CE to initiate CEC. In this work, we provide the first comprehensive review of the recent progress of the solid-liquid interface-mediated CEC process, including its working principles, relationship with surface science, recent breakthroughs in applications, and future challenges. We aim to provide fundamental guidance for researchers to understand the reaction mechanism of the CEC process and to propose potential pathways to enhance CEC efficiency from a surface and interfacial science perspective. Later, recent application scenarios using the novel CEC techniques are summarized, including wastewater treatment, efficient generation of hydrogen peroxide (H2O2), lithium-ion battery recycling, and CO2 reduction. In general, CEC technology has opened a new avenue for catalysis, effectively expanding the range of catalyst options and holding promise as a solution to a variety of complex catalytic challenges in the future.
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Affiliation(s)
- Zhixiang Chen
- Future Technology School, Shenzhen Technology University, Shenzhen 518118, P. R. China
| | - Yi Lu
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
- Bioproducts Institute, Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Ruolan Hong
- Future Technology School, Shenzhen Technology University, Shenzhen 518118, P. R. China
| | - Zijun Liang
- Future Technology School, Shenzhen Technology University, Shenzhen 518118, P. R. China
| | - Leyan Wen
- Future Technology School, Shenzhen Technology University, Shenzhen 518118, P. R. China
| | - Xinyi Liu
- Future Technology School, Shenzhen Technology University, Shenzhen 518118, P. R. China
| | - Qingxia Liu
- Future Technology School, Shenzhen Technology University, Shenzhen 518118, P. R. China
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 1H9, Canada
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3
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Helseth LE. Charge Transfer Quenching and Maximum of a Liquid-Air Contact Line Moving over a Hydrophobic Surface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:4340-4349. [PMID: 38351538 PMCID: PMC10905998 DOI: 10.1021/acs.langmuir.3c03605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Revised: 02/05/2024] [Accepted: 02/06/2024] [Indexed: 02/28/2024]
Abstract
Charge transfer when a hydrophobic fluoropolymer surface comes in contact with salt solutions of water, methanol, and glycerol is investigated. It is found that the charge transfer decreases faster with an increasing fraction of glycerol in water than it does with methanol in water. It is also demonstrated that for both mixtures, the charge transfer increases with the amount of added sodium chloride for small concentrations but then reaches a maximum and subsequently decreases. Surprisingly, this maximum charge transfer shifts toward higher salt concentrations with increasing amount of glycerol in water. However, in water-methanol mixtures, one does not observe a similar shift in charge transfer maximum toward higher salt concentrations. These observations are explained using a model, taking into account the decreased shear distance from the hydrophobic surface for which ions are removed from the electrical double layer due to an interplay of forces acting on the ions.
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Affiliation(s)
- Lars Egil Helseth
- Department of Physics and
Technology, University of Bergen, Allegaten 55, Bergen 5020, Norway
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Bista P, Ratschow AD, Butt HJ, Weber SAL. High Voltages in Sliding Water Drops. J Phys Chem Lett 2023; 14:11110-11116. [PMID: 38052008 PMCID: PMC10726385 DOI: 10.1021/acs.jpclett.3c02864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 11/22/2023] [Accepted: 11/28/2023] [Indexed: 12/07/2023]
Abstract
Water drops on insulating hydrophobic substrates can generate electric potentials of kilovolts upon sliding for a few centimeters. We show that the drop saturation voltage corresponds to an amplified value of the solid-liquid surface potential at the substrate. The amplification is given by the substrate geometry, the drop and substrate dielectric properties, and the Debye length within the liquid. Next to enabling an easy and low-cost way to measure surface- and zeta- potentials, the high drop voltages have implications for energy harvesting, droplet microfluidics, and electrostatic discharge protection.
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Affiliation(s)
- Pravash Bista
- Max
Planck Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany
| | - Aaron D. Ratschow
- Institute
for Nano- and Microfluidics, TU Darmstadt, Peter-Grünberg-Strasse 10, Darmstadt 64289, Germany
| | - Hans-Jürgen Butt
- Max
Planck Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany
| | - Stefan A. L. Weber
- Max
Planck Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany
- Department
of Physics, Johannes Gutenberg University, Staudingerweg 10, Mainz 55128, Germany
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Helseth LE. Ion Concentration Influences the Charge Transfer Due to a Water-Air Contact Line Moving over a Hydrophobic Surface: Charge Measurements and Theoretical Models. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:1826-1837. [PMID: 36696661 PMCID: PMC9910047 DOI: 10.1021/acs.langmuir.2c02716] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 01/11/2023] [Indexed: 05/28/2023]
Abstract
A metal electrode covered by an inert, hydrophobic polymer surface is dipped into water, and the charge transfer was measured as a function of ion concentration for different chlorides, sulfates, and nitrates. A generic behavior is observed wherein the charge transfer first increases and then decreases as the ion concentration increases. However, for acids, the charge transfer decreases monotonously with concentration and even reverses polarity. Two different models, both in which the charge transfer is attributed to removal of ions from the electrical double layer as the contact line passes by, are discussed and shown to provide possible explanations of the experimental data.
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Abstract
Interfaces between a liquid and a solid (L-S) are the most important surface science in chemistry, catalysis, energy, and even biology. Formation of an electric double layer (EDL) at the L-S interface has been attributed due to the adsorption of a layer of ions at the solid surface, which causes the ions in the liquid to redistribute. Although the existence of a layer of charges on a solid surface is always assumed, the origin of the charges is not extensively explored. Recent studies of contact electrification (CE) between a liquid and a solid suggest that electron transfer plays a dominant role at the initial stage for forming the charge layer at the L-S interface. Here, we review the recent works about electron transfer in liquid-solid CE, including scenerios such as liquid-insulator, liquid-semiconductor, and liquid-metal. Formation of the EDL is revisited considering the existence of electron transfer at the L-S interface. Furthermore, the triboelectric nanogenerator (TENG) technique based on the liquid-solid CE is introduced, which can be used not only for harvesting mechanical energy from a liquid but also as a probe for probing the charge transfer at liquid-solid interfaces.
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Affiliation(s)
- Shiquan Lin
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, P. R. China.,School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Xiangyu Chen
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, P. R. China.,School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Zhong Lin Wang
- Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, P. R. China.,School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States
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Rodrigues-Marinho T, Castro N, Correia V, Costa P, Lanceros-Méndez S. Triboelectric Energy Harvesting Response of Different Polymer-Based Materials. MATERIALS 2020; 13:ma13214980. [PMID: 33167460 PMCID: PMC7663963 DOI: 10.3390/ma13214980] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 10/19/2020] [Accepted: 10/31/2020] [Indexed: 12/02/2022]
Abstract
Energy harvesting systems for low-power devices are increasingly being a requirement within the context of the Internet of Things and, in particular, for self-powered sensors in remote or inaccessible locations. Triboelectric nanogenerators are a suitable approach for harvesting environmental mechanical energy otherwise wasted in nature. This work reports on the evaluation of the output power of different polymer and polymer composites, by using the triboelectric contact-separation systems (10 N of force followed by 5 cm of separation per cycle). Different materials were used as positive (Mica, polyamide (PA66) and styrene/ethylene-butadiene/styrene (SEBS)) and negative (polyvinylidene fluoride (PVDF), polyurethane (PU), polypropylene (PP) and Kapton) charge materials. The obtained output power ranges from 0.2 to 5.9 mW, depending on the pair of materials, for an active area of 46.4 cm2. The highest response was obtained for Mica with PVDF composites with 30 wt.% of barium titanate (BT) and PA66 with PU pairs. A simple application has been developed based on vertical contact-separation mode, able to power up light emission diodes (LEDs) with around 30 cycles to charge a capacitor. Further, the capacitor can be charged in one triboelectric cycle if an area of 0.14 m2 is used.
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Affiliation(s)
- Tiago Rodrigues-Marinho
- Center of Physics, Campus Gualtar, University of Minho, 4710-057 Braga, Portugal; (T.R.-M.); (V.C.)
| | - Nelson Castro
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain; (N.C.); (S.L.-M.)
| | - Vitor Correia
- Center of Physics, Campus Gualtar, University of Minho, 4710-057 Braga, Portugal; (T.R.-M.); (V.C.)
- Algoritmi Research Center, University of Minho, 4800-058 Guimarães, Portugal
| | - Pedro Costa
- Center of Physics, Campus Gualtar, University of Minho, 4710-057 Braga, Portugal; (T.R.-M.); (V.C.)
- Institute for Polymers and Composites IPC/i3N, University of Minho, 4800-058 Guimarães, Portugal
- Correspondence:
| | - Senentxu Lanceros-Méndez
- BCMaterials, Basque Center for Materials, Applications and Nanostructures, UPV/EHU Science Park, 48940 Leioa, Spain; (N.C.); (S.L.-M.)
- IKERBASQUE, Basque Foundation for Science, 48009 Bilbao, Spain
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Kou R, Zhong Y, Qiao Y. Flow Electrification of a Corona-Charged Polyethylene Terephthalate Film. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:9571-9577. [PMID: 32702991 DOI: 10.1021/acs.langmuir.0c01596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Corona charging of a free-standing polymer film can produce a quasi-permanent potential difference across the film thickness, while the absolute amplitude of the surface voltage may be highly sensitive to the free charges. To precisely control the voltage distribution, we investigated the flow electrification technology by exposing corona-charged polyethylene terephthalate films to sodium salt solutions. The surface voltage and the free-charge density were adjusted by the salt concentration, the anion size, and the flow rate. The dipolar component of electric potential remained unchanged. This result has significant scientific interest and technological importance to surface treatment, filtration, energy harvesting, among others.
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Affiliation(s)
- Rui Kou
- Department of Structural Engineering, University of California-San Diego, La Jolla, California 92093-0085, United States
| | - Ying Zhong
- Department of Structural Engineering, University of California-San Diego, La Jolla, California 92093-0085, United States
- Department of Mechanical Engineering, University of South Florida, Tampa, Florida 33620, United States
| | - Yu Qiao
- Department of Structural Engineering, University of California-San Diego, La Jolla, California 92093-0085, United States
- Program of Materials Science and Engineering, University of California-San Diego, La Jolla, California 92093, United States
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Helseth LE. Influence of Salt Concentration on Charge Transfer When a Water Front Moves across a Junction between a Hydrophobic Dielectric and a Metal Electrode. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:8002-8008. [PMID: 32559100 DOI: 10.1021/acs.langmuir.0c01358] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
An energy-harvesting device based on water moving across the junction between a hydrophobic dielectric and a metal electrode is demonstrated. The charge transfer due to contact electrification as the junction is dipped vertically into water is investigated. Experiments combined with finite element simulations reveal how the electrode voltage changes during the dipping process. Moreover, the charge transfer observed for a range of salt concentrations is studied, and it is found that there exists an optimal salt concentration which allows maximum charge transfer. It is suggested that these results can be understood because of the additional charge removal from the diffuse electrical double layer at the hydrophobic surface. It is demonstrated that by tuning the salt concentration, one can harvest more than 3 times the electrical power as compared with pure water.
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Affiliation(s)
- L E Helseth
- Department of Physics and Technology, University of Bergen, Allegaten 55, 5020 Bergen, Norway
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