1
|
Nisar M, Galland GB, Geshev J, Bergmann C, Quijada R. Magnetically Stimulable Graphene Oxide/Polypropylene Nanocomposites. ACS OMEGA 2023; 8:21983-21995. [PMID: 37360436 PMCID: PMC10286093 DOI: 10.1021/acsomega.3c01917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 05/24/2023] [Indexed: 06/28/2023]
Abstract
Core-shell magnetic air-stable nanoparticles have attracted increasing interest in recent years. Attaining a satisfactory distribution of magnetic nanoparticles (MNPs) in polymeric matrices is difficult due to magnetically induced aggregation, and supporting the MNPs on a nonmagnetic core-shell is a well-established strategy. In order to obtain magnetically active polypropylene (PP) nanocomposites by melt mixing, the thermal reduction of graphene oxides (TrGO) at two different temperatures (600 and 1000 °C) was carried out, and, subsequently, metallic nanoparticles (Co or Ni) were dispersed on them. The XRD patterns of the nanoparticles show the characteristic peaks of the graphene, Co, and Ni nanoparticles, where the estimated sizes of Ni and Co were 3.59 and 4.25 nm, respectively. The Raman spectroscopy presents typical D and G bands of graphene materials as well as the corresponding peaks of Ni and Co nanoparticles. Elemental and surface area studies show that the carbon content and surface area increase with thermal reduction, as expected, following a reduction in the surface area by the support of MNPs. Atomic absorption spectroscopy demonstrates about 9-12 wt % metallic nanoparticles supported on the TrGO surface, showing that the reduction of GO at two different temperatures has no significant effect on the support of metallic nanoparticles. Fourier transform infrared (FT-IR) spectroscopy shows that the addition of a filler does not alter the chemical structure of the polymer. Scanning electron microscopy of the fracture interface of the samples demonstrates consistent dispersion of the filler in the polymer. The TGA analysis shows that, with the incorporation of the filler, the initial (Tonset) and maximum (Tmax) degradation temperatures of the PP nanocomposites increase up to 34 and 19 °C, respectively. The DSC results present an improvement in the crystallization temperature and percent crystallinity. The filler addition slightly enhances the elastic modulus of the nanocomposites. The results of the water contact angle confirm that the prepared nanocomposites are hydrophilic. Importantly, the diamagnetic matrix is transformed into a ferromagnetic one with the addition of the magnetic filler.
Collapse
Affiliation(s)
- Muhammad Nisar
- Facultad
de Ingeniería, Universidad Católica
de la Santísima Concepción, Alonso de Ribera 2850, Concepción 4090541, Chile
| | - Griselda Barrera Galland
- Instituto
de Química, Universidade Federal
do Rio Grande do Sul, Av. Bento Gonçalves, 9500, 91501-970 Porto Alegre, Brazil
| | - Julian Geshev
- Instituto
de Física, Universidade Federal do
Rio Grande do Sul, Av.
Bento Gonçalves, 9500, 91501-970 Porto Alegre, Brazil
| | - Carlos Bergmann
- Laboratório
de Materiais Cerâmicos, Departamento de Materiais, Universidade Federal do Rio Grande do Sul, Porto Alegre 90010-150, Brazil
| | - Raúl Quijada
- Departamento
de Ingeniería Química, Biotecnología y Materiales,
Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, Santiago 8370456, Chile
| |
Collapse
|
2
|
Guo K, Lu X, Jia J, Zhou Z, Huang J, Wang S, Li S, Wu H, Xu C. Selenite-Decorated Polycrystalline NiO Nanosheets Generated from Cathodic Reconstruction for Electrocatalytic Hydrogen Production. Inorg Chem 2023. [PMID: 37256938 DOI: 10.1021/acs.inorgchem.3c01212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Precatalyst reconstruction in alkaline hydrogen evolution reaction (HER) usually leads to changes in the morphology, composition, and structure, thus improving the catalytic activity, which recently receives intensive attention. However, the design strategies of cathodic reconstruction and the structural features of reconstruction products have not achieved a profound understanding. Here, from the point of thermodynamic stability, metastable nickel selenite dihydrate (NiSeO3·2H2O) is deliberately fabricated as a precatalyst to comprehensively study the reconstruction dynamics in alkaline HER. Multiple in/ex situ techniques capture the geometric, component, and phase evolutions, proving that NiSeO3·2H2O can be transformed into SeO32--decorated polycrystalline NiO nanosheets with rich active sites and good conductivity under alkaline HER conditions, which act as a real catalytic active species. Density functional theory calculations demonstrate that the adsorption of SeO32- can further promote the HER activity of NiO due to the optimized free energy of water activation and hydrogen adsorption. As a result, the SeO32--NiO catalyst exhibits a low overpotential at -10 mA cm-2 (90 mV) and long-term stability (>100 h). This work highlights the targeted design of precatalyst to trigger and utilize cathodic reconstruction and provides an available method for the development of adsorption-modulated efficient electrocatalysts.
Collapse
Affiliation(s)
- Kailu Guo
- Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471934, China
| | - Xiaoyan Lu
- Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471934, China
| | - Jinzhi Jia
- State Key Laboratory of Applied Organic Chemistry, Laboratory of Special Function Materials and Structure Design of the Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Zhan Zhou
- Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471934, China
| | - Junfeng Huang
- State Key Laboratory of Applied Organic Chemistry, Laboratory of Special Function Materials and Structure Design of the Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| | - Shuang Wang
- Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471934, China
| | - Shihui Li
- Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471934, China
| | - Haixia Wu
- Henan Key Laboratory of Function-Oriented Porous Materials, College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471934, China
| | - Cailing Xu
- State Key Laboratory of Applied Organic Chemistry, Laboratory of Special Function Materials and Structure Design of the Ministry of Education, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
| |
Collapse
|
3
|
Synthesis of lignite-based Ni/C composite with low-medium temperature pyrolysis method as an efficient Pt-free counter electrode for dye-sensitized solar cells. J APPL ELECTROCHEM 2022. [DOI: 10.1007/s10800-022-01822-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
4
|
Deng Y, Yun S, Dang J, Zhang Y, Dang C, Wang Y, Liu Z, Gao Z. A multi-dimensional hierarchical strategy building melamine sponge-derived tetrapod carbon supported cobalt-nickel tellurides 0D/3D nanohybrids for boosting hydrogen evolution and triiodide reduction reaction. J Colloid Interface Sci 2022; 624:650-669. [DOI: 10.1016/j.jcis.2022.05.147] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 05/23/2022] [Accepted: 05/25/2022] [Indexed: 01/03/2023]
|
5
|
Chavan HS, Hou B, Jo Y, Inamdar AI, Im H, Kim H. Optimal Rule-of-Thumb Design of Nickel-Vanadium Oxides as an Electrochromic Electrode with Ultrahigh Capacity and Ultrafast Color Tunability. ACS APPLIED MATERIALS & INTERFACES 2021; 13:57403-57410. [PMID: 34806376 DOI: 10.1021/acsami.1c18613] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The use of electrodes capable of functioning as both electrochromic windows and energy storage devices has been extended from green building development to various electronics and displays to promote more efficient energy consumption. Herein, we report the electrochromic energy storage of bimetallic NiV oxide (NiVO) thin films fabricated using chemical bath deposition. The best optimized NiVO electrode with a Ni/V ratio of 3 exhibits superior electronic conductivity and a large electrochemical surface area, which are beneficial for enhancing electrochemical performance. The color switches between semitransparent (a discharged state) and dark brown (a charged state) with excellent reproducibility because of the intercalation and deintercalation of OH- ions in an alkaline KOH electrolyte. A specific capacity of 2403 F g-1, a coloration efficiency of 63.18 cm2 C-1, and an outstanding optical modulation of 68% are achieved. The NiVO electrode also demonstrates ultrafast coloration and bleaching behavior (1.52 and 4.79 s, respectively), which are considerably faster than those demonstrated by the NiO electrode (9.03 and 38.87 s). It retains 91.95% capacity after 2000 charge-discharge cycles, much higher than that of the NiO electrode (83.47%), indicating that it has significant potential for use in smart energy storage applications. The superior electrochemical performance of the best NiVO compound electrode with an optimum Ni/V compositional ratio is due to the synergetic effect between the high electrochemically active surface area induced by V-doping-improved redox kinetics (low charge-transfer resistance) and fast ion diffusion, which provides a facile charge transport pathway at the electrolyte/electrode interface.
Collapse
Affiliation(s)
- Harish S Chavan
- Division of Physics and Semiconductor Science, Dongguk University, Seoul 04620, South Korea
| | - Bo Hou
- Department of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, U.K
| | - Yongcheol Jo
- Division of Physics and Semiconductor Science, Dongguk University, Seoul 04620, South Korea
| | - Akbar I Inamdar
- Division of Physics and Semiconductor Science, Dongguk University, Seoul 04620, South Korea
| | - Hyunsik Im
- Division of Physics and Semiconductor Science, Dongguk University, Seoul 04620, South Korea
| | - Hyungsang Kim
- Division of Physics and Semiconductor Science, Dongguk University, Seoul 04620, South Korea
| |
Collapse
|
6
|
Bellani S, Bartolotta A, Agresti A, Calogero G, Grancini G, Di Carlo A, Kymakis E, Bonaccorso F. Solution-processed two-dimensional materials for next-generation photovoltaics. Chem Soc Rev 2021; 50:11870-11965. [PMID: 34494631 PMCID: PMC8559907 DOI: 10.1039/d1cs00106j] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Indexed: 12/12/2022]
Abstract
In the ever-increasing energy demand scenario, the development of novel photovoltaic (PV) technologies is considered to be one of the key solutions to fulfil the energy request. In this context, graphene and related two-dimensional (2D) materials (GRMs), including nonlayered 2D materials and 2D perovskites, as well as their hybrid systems, are emerging as promising candidates to drive innovation in PV technologies. The mechanical, thermal, and optoelectronic properties of GRMs can be exploited in different active components of solar cells to design next-generation devices. These components include front (transparent) and back conductive electrodes, charge transporting layers, and interconnecting/recombination layers, as well as photoactive layers. The production and processing of GRMs in the liquid phase, coupled with the ability to "on-demand" tune their optoelectronic properties exploiting wet-chemical functionalization, enable their effective integration in advanced PV devices through scalable, reliable, and inexpensive printing/coating processes. Herein, we review the progresses in the use of solution-processed 2D materials in organic solar cells, dye-sensitized solar cells, perovskite solar cells, quantum dot solar cells, and organic-inorganic hybrid solar cells, as well as in tandem systems. We first provide a brief introduction on the properties of 2D materials and their production methods by solution-processing routes. Then, we discuss the functionality of 2D materials for electrodes, photoactive layer components/additives, charge transporting layers, and interconnecting layers through figures of merit, which allow the performance of solar cells to be determined and compared with the state-of-the-art values. We finally outline the roadmap for the further exploitation of solution-processed 2D materials to boost the performance of PV devices.
Collapse
Affiliation(s)
- Sebastiano Bellani
- BeDimensional S.p.A., Via Lungotorrente Secca 30R, 16163 Genova, Italy.
- Istituto Italiano di Tecnologia, Graphene Labs, via Moreogo 30, 16163 Genova, Italy
| | - Antonino Bartolotta
- CNR-IPCF, Istituto per i Processi Chimico-Fisici, Via F. Stagno D'alcontres 37, 98158 Messina, Italy
| | - Antonio Agresti
- CHOSE - Centre for Hybrid and Organic Solar Energy, University of Rome "Tor Vergata", via del Politecnico 1, 00133 Roma, Italy
| | - Giuseppe Calogero
- CNR-IPCF, Istituto per i Processi Chimico-Fisici, Via F. Stagno D'alcontres 37, 98158 Messina, Italy
| | - Giulia Grancini
- University of Pavia and INSTM, Via Taramelli 16, 27100 Pavia, Italy
| | - Aldo Di Carlo
- CHOSE - Centre for Hybrid and Organic Solar Energy, University of Rome "Tor Vergata", via del Politecnico 1, 00133 Roma, Italy
- L.A.S.E. - Laboratory for Advanced Solar Energy, National University of Science and Technology "MISiS", 119049 Leninskiy Prosect 6, Moscow, Russia
| | - Emmanuel Kymakis
- Department of Electrical & Computer Engineering, Hellenic Mediterranean University, Estavromenos 71410 Heraklion, Crete, Greece
| | - Francesco Bonaccorso
- BeDimensional S.p.A., Via Lungotorrente Secca 30R, 16163 Genova, Italy.
- Istituto Italiano di Tecnologia, Graphene Labs, via Moreogo 30, 16163 Genova, Italy
| |
Collapse
|
7
|
El-Lateef HMA, Gouda M. Novel nanocomposites of nickel and copper oxide nanoparticles embedded in a melamine framework containing cellulose nanocrystals: Material features and corrosion protection applications. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116960] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
8
|
Rahman MM. Low-Cost and Efficient Nickel Nitroprusside/Graphene Nanohybrid Electrocatalysts as Counter Electrodes for Dye-Sensitized Solar Cells. MATERIALS (BASEL, SWITZERLAND) 2021; 14:6563. [PMID: 34772088 PMCID: PMC8585226 DOI: 10.3390/ma14216563] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 10/14/2021] [Accepted: 10/29/2021] [Indexed: 11/18/2022]
Abstract
Novel nickel nitroprusside (NNP) nanoparticles with incorporated graphene nanoplatelets (NNP/GnP) were used for the first time as a low-cost and effective counter electrode (CE) for dye-sensitized solar cells (DSSCs). NNP was synthesized at a low-temperature (25 °C) solution process with suitable purity and crystallinity with a size range from 5 to 10 nm, as confirmed by different spectroscopic and microscopic analyses. The incorporation of an optimized amount of GnP (0.2 wt%) into the NNP significantly improved the electrocatalytic behavior for the redox reaction of iodide (I-)/tri-iodide (I3-) by decreasing the charge-transfer resistance at the CE/electrolyte interface, lower than the NNP- and GnP-CEs, and comparable to the Pt-CE. The NNP/GnP nanohybrid CE when applied in DSSC exhibited a PCE of 6.13% (under one sun illumination conditions) with the Jsc, Voc, and FF of 14.22 mA/cm2, 0.628 V, and 68.68%, respectively, while the PCE of the reference Pt-CE-based DSSC was 6.37% (Jsc = 14.47 mA/cm2, Voc = 0.635 V, and FF = 69.20%). The low cost of the NNP/GnP hybrid CE with comparable photovoltaic performance to Pt-CE can be potentially exploited as a suitable replacement of Pt-CE in DSSCs.
Collapse
Affiliation(s)
- Md Mahbubur Rahman
- Department of Applied Chemistry, Konkuk University, Chungju 27478, Korea
| |
Collapse
|
9
|
Ma LJ, Shi JB, Wang G, Fu ZZ, Wu YH, Lei BX, Sun ZF. Economically synthesized NiCo2S4/TiO2 with high reflectance ability as the counter electrode to replace Pt for dye-sensitized solar cells. ADV POWDER TECHNOL 2021. [DOI: 10.1016/j.apt.2021.05.038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
10
|
Kamarulzaman U, Rahman M, Su'ait M, Umar A. NickelPalladium alloy–reduced graphene oxide as counter electrode for dye-sensitized solar cells. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115289] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
11
|
Nickel sulphide-reduced graphene oxide composites as counter electrode for dye-sensitized solar cells: Influence of nickel chloride concentration. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2020.03.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
12
|
Zeng M, Zhang L, Wu D, Ma J, Zhang C, Li S. Asymmetric supercapacitors based on high capacitance Ni6MnO8 and graphene. CHINESE CHEM LETT 2019. [DOI: 10.1016/j.cclet.2019.01.026] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
13
|
Economically viable V2O3@activated carbon composite materials as counter electrodes for dye sensitized solar cells by single step reduction. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.01.034] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
14
|
Yang Q, Yao J, Zhang K, Wang W, Zuo X, Tang H, Wu M, Li G. Perovskite-type La1−Ca MnO3 manganese oxides as effective counter electrodes for dye-sensitized solar cells. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2018.11.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
15
|
Liu Y, Gao C, Li Q, Pang H. Nickel Oxide/Graphene Composites: Synthesis and Applications. Chemistry 2018; 25:2141-2160. [DOI: 10.1002/chem.201803982] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Yushu Liu
- School of Chemistry and Chemical Engineering, Institute for Innovative Materials and Energy; Yangzhou University; Yangzhou 225009 Jiangsu P.R. China
| | - Chun Gao
- School of Chemistry and Chemical Engineering, Institute for Innovative Materials and Energy; Yangzhou University; Yangzhou 225009 Jiangsu P.R. China
- Jiangsu Commercial Vocational College; Nantong 226011 Jiangsu P.R. China
| | - Qing Li
- School of Chemistry and Chemical Engineering, Institute for Innovative Materials and Energy; Yangzhou University; Yangzhou 225009 Jiangsu P.R. China
| | - Huan Pang
- School of Chemistry and Chemical Engineering, Institute for Innovative Materials and Energy; Yangzhou University; Yangzhou 225009 Jiangsu P.R. China
| |
Collapse
|
16
|
Synthesis of La2MoO6@MWCNTs composite catalysts as Pt-free counter electrodes for dye-sensitized solar cell. J RARE EARTH 2018. [DOI: 10.1016/j.jre.2018.03.029] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
17
|
Microwave assisted synthesis and molecular structure visualization of ultrahigh surface area Ni-6,6′-dibromo-indigo coordinated polymeric MOFs stabilized via hydrogen bonding. INORG CHEM COMMUN 2018. [DOI: 10.1016/j.inoche.2018.04.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
18
|
Recent Progress on the Synthesis of Graphene-Based Nanostructures as Counter Electrodes in DSSCs Based on Iodine/Iodide Electrolytes. Catalysts 2017. [DOI: 10.3390/catal7080234] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
|
19
|
Utility of Pt in PtNi alloy counter electrodes as a new avenue for cost effective and highly efficient liquid junction photovoltaic devices. J Colloid Interface Sci 2017; 495:78-83. [PMID: 28189112 DOI: 10.1016/j.jcis.2017.01.118] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 01/30/2017] [Accepted: 01/30/2017] [Indexed: 11/22/2022]
Abstract
This study presents the synthesis of PtNi alloys with different volume ratios of Pt and Ni precursors in mixture solutions using dry plasma reduction under atmospheric pressure and low temperature. The developed materials are applied as efficient counter electrodes (CEs) in dye-sensitized solar cells (DSCs). The investigation of the Pt utility in PtNi alloys for electrocatalytic activity, and cost effective and highly efficient DSCs are also investigated. Compared with the reference electrodes (Pt and Ni CEs), the developed PtNi alloy CEs exhibit better reversibility as indicated by the peak-to-peak separation and better catalytic activity for the regeneration of iodide ions from triiodide ions. Thus, the DSC with the developed PtNi CEs provides higher efficiency than that of the device fabricated with the reference electrodes.
Collapse
|
20
|
Yun J, Khan FA, Baik S. Janus Graphene Oxide Sponges for High-Purity Fast Separation of Both Water-in-Oil and Oil-in-Water Emulsions. ACS APPLIED MATERIALS & INTERFACES 2017; 9:16694-16703. [PMID: 28481520 DOI: 10.1021/acsami.7b03322] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Membrane separation of oil and water with high purity and high permeability is of great interest in environmental and industrial processes. However, membranes with fixed wettability can separate only one type of surfactant-stabilized emulsion (water-in-oil or oil-in-water). Here, we report on Janus graphene oxide (J-GO) sponges for high purity and high permeability separation of both water-in-oil and oil-in-water emulsions. Millimeter-scale reduced GO sponges with a controlled pore size (11.2 or 94.1 μm) are synthesized by freeze drying, and the wettability is further controlled by fluorine (hydrophobic/oleophilic in air) or oxygen (hydrophilic/oleophilic in air) functionalization. J-GO sponges are prepared by the fluorine functionalization on one side and oxygen functionalization on the other side. Interestingly, the oil wettability of oxygen-functionalized surface turns into an oleophobic surface when immersed in water, which is explained by Young's theory. This effect is further used in the separation of both water-in-oil and oil-in-water emulsions by changing the flow direction. The purity of the separated oil and water is very high (≥99.2%), and the permeability is more than an order of magnitude greater than those of the other Janus membranes reported. J-GO sponges can be reused with an excellent repeatability, demonstrating feasibility in practical applications.
Collapse
Affiliation(s)
| | | | - Seunghyun Baik
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS) , Suwon 16419, Republic of Korea
| |
Collapse
|
21
|
Sharma M, Sharma M, Hazarika A, Satyanarayana L, Karunakar GV, Bania KK. C Cl bond activation with Pd(II)-NiO nanoparticles supported on zeolite-Y: The role of charge transfer transition. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.mcat.2017.02.023] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
22
|
Xu Y, Tu W, Zhang B, Yin S, Huang Y, Kraft M, Xu R. Nickel Nanoparticles Encapsulated in Few-Layer Nitrogen-Doped Graphene Derived from Metal-Organic Frameworks as Efficient Bifunctional Electrocatalysts for Overall Water Splitting. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1605957. [PMID: 28102612 DOI: 10.1002/adma.201605957] [Citation(s) in RCA: 241] [Impact Index Per Article: 34.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 11/30/2016] [Indexed: 05/26/2023]
Abstract
Nickel nanoparticles encapsulated in few-layer nitrogen-doped graphene (Ni@NC) are synthesized by using a Ni-based metal-organic framework as the precursor for high-temperature annealing treatment. The resulting Ni@NC materials exhibit highly efficient and ultrastable electrocatalytic activity toward the hydrogen evolution reaction and the oxygen evolution reaction as well as overall water splitting in alkaline environment.
Collapse
Affiliation(s)
- You Xu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
- SinBeRISE CREATE, National Research Foundation, CREATE Tower, 1 Create Way, Singapore, 138602, Singapore
| | - Wenguang Tu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Bowei Zhang
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Shengming Yin
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | - Yizhong Huang
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Markus Kraft
- C4T CREATE, National Research Foundation, CREATE Tower, 1 Create Way, Singapore, 138602, Singapore
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, CB2 3RA, UK
| | - Rong Xu
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
- SinBeRISE CREATE, National Research Foundation, CREATE Tower, 1 Create Way, Singapore, 138602, Singapore
- C4T CREATE, National Research Foundation, CREATE Tower, 1 Create Way, Singapore, 138602, Singapore
| |
Collapse
|
23
|
Wang L, Duan G, Zhu J, Chen SM, Liu X. High capacity supercapacitor material based on reduced graphene oxide loading mesoporpus murdochite-type Ni 6 MnO 8 nanospheres. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.09.118] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|
24
|
Yang W, Xu X, Gao Y, Li Z, Li C, Wang W, Chen Y, Ning G, Zhang L, Yang F, Chen S, Wang A, Kong J, Li Y. High-surface-area nanomesh graphene with enriched edge sites as efficient metal-free cathodes for dye-sensitized solar cells. NANOSCALE 2016; 8:13059-13066. [PMID: 27328165 DOI: 10.1039/c6nr01838f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Exploiting cost-effective and highly efficient counter electrodes (CEs) has been a persistent objective for practical application of dye-sensitized solar cells (DSSCs). Here, we present an efficient CE by using pure three-dimensional (3D) nanomesh graphene frameworks (NGFs) which are synthesized via a template-directed chemical vapor deposition (CVD) approach. The high-surface-area 3D NGFs associated with the enriched surface edge defects make it very efficient towards I3(-) reduction even without any Pt catalyst. More interestingly, by virtue of the interpenetrating graphene frameworks, the NGFs exhibit excellent electron conductivity, thus leading to facile charge transfer. Consequently, the DSSCs with pure NGFs as CEs display a power conversion efficiency of 7.32%, which is comparable to that of Pt as CEs (7.28%), thereby exhibiting great potential as low-cost and highly efficient CE materials for large-scale deployment of DSSCs.
Collapse
Affiliation(s)
- Wang Yang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China.
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
25
|
Levchenko I, Ostrikov KK, Zheng J, Li X, Keidar M, B K Teo K. Scalable graphene production: perspectives and challenges of plasma applications. NANOSCALE 2016; 8:10511-10527. [PMID: 26837802 DOI: 10.1039/c5nr06537b] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Graphene, a newly discovered and extensively investigated material, has many unique and extraordinary properties which promise major technological advances in fields ranging from electronics to mechanical engineering and food production. Unfortunately, complex techniques and high production costs hinder commonplace applications. Scaling of existing graphene production techniques to the industrial level without compromising its properties is a current challenge. This article focuses on the perspectives and challenges of scalability, equipment, and technological perspectives of the plasma-based techniques which offer many unique possibilities for the synthesis of graphene and graphene-containing products. The plasma-based processes are amenable for scaling and could also be useful to enhance the controllability of the conventional chemical vapour deposition method and some other techniques, and to ensure a good quality of the produced graphene. We examine the unique features of the plasma-enhanced graphene production approaches, including the techniques based on inductively-coupled and arc discharges, in the context of their potential scaling to mass production following the generic scaling approaches applicable to the existing processes and systems. This work analyses a large amount of the recent literature on graphene production by various techniques and summarizes the results in a tabular form to provide a simple and convenient comparison of several available techniques. Our analysis reveals a significant potential of scalability for plasma-based technologies, based on the scaling-related process characteristics. Among other processes, a greater yield of 1 g × h(-1) m(-2) was reached for the arc discharge technology, whereas the other plasma-based techniques show process yields comparable to the neutral-gas based methods. Selected plasma-based techniques show lower energy consumption than in thermal CVD processes, and the ability to produce graphene flakes of various sizes reaching hundreds of square millimetres, and the thickness varying from a monolayer to 10-20 layers. Additional factors such as electrical voltage and current, not available in thermal CVD processes could potentially lead to better scalability, flexibility and control of the plasma-based processes. Advantages and disadvantages of various systems are also considered.
Collapse
Affiliation(s)
- Igor Levchenko
- School of Chemistry, Physics, and Mechanical Engineering, Queensland University of Technology (QUT), Brisbane, Queensland 4000, Australia.
| | - Kostya Ken Ostrikov
- School of Chemistry, Physics, and Mechanical Engineering, Queensland University of Technology (QUT), Brisbane, Queensland 4000, Australia. and Joint CSIRO - QUT Sustainable Materials and Devices Laboratory, Commonwealth Scientific and Industrial Research Organisation, P.O. Box 218, Lindfield, New South Wales 2070, Australia. and Beijing National Laboratory for Molecular Sciences (BNLMS), College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Jie Zheng
- Beijing National Laboratory for Molecular Sciences (BNLMS), College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Xingguo Li
- Beijing National Laboratory for Molecular Sciences (BNLMS), College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Michael Keidar
- School of Engineering and Applied Science, George Washington University, Washington, DC 20052, USA
| | - Kenneth B K Teo
- AIXTRON Nanoinstruments, Buckingway Business Park, Swavesey, Cambridge CB24 4FQ, UK
| |
Collapse
|
26
|
Kim J, Jung CL, Kim M, Kim S, Kang Y, Lee HS, Park J, Jun Y, Kim D. Electrocatalytic activity of NiO on silicon nanowires with a carbon shell and its application in dye-sensitized solar cell counter electrodes. NANOSCALE 2016; 8:7761-7767. [PMID: 27001286 DOI: 10.1039/c5nr08265j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
To improve the catalytic activity of a material, it is critical to maximize the effective surface area by directly contacting the electrolyte. Nanowires are a promising building block for catalysts in electrochemical applications because of their large surface area. Nickel oxide (NiO) decoration was achieved by drop-casting a nickel-dissolved solution onto vertically aligned silicon nanowire arrays with a carbon shell (SiNW/C). Based on the hybridization of the NiO and silicon nanowire arrays with a carbon shell this study aimed to achieve a synergic effect for the catalytic activity performance. This study demonstrated that the resulting nanomaterial exhibits excellent electrocatalytic activity and performs well as a counter electrode for dye-sensitized solar cells (DSSCs). The compositions of the materials were examined using X-ray diffraction, X-ray photoelectron spectroscopy, and energy dispersive spectroscopy. Their micro- and nano-structures were investigated using scanning electron microscopy and transmission electron microscopy. The electrochemical activity toward I(-)/I3(-) was examined using cyclic voltammetry and electrochemical impedance spectroscopy. The obtained peak power conversion efficiency of the DSSC based on the NiO@SiNW/C counter electrode was 9.49%, which was greater than that of the DSSC based on the Pt counter electrode.
Collapse
Affiliation(s)
- Junhee Kim
- Department of Materials Science and Engineering, Korea University, Anam-dong, Seongbuk-gu, Seoul 137-713, Korea.
| | - Cho-long Jung
- Department of Chemical Engineering, UNIST, Banyeon, Ulju, Ulsan 689-798, Korea
| | - Minsoo Kim
- Department of Materials Science and Engineering, Korea University, Anam-dong, Seongbuk-gu, Seoul 137-713, Korea.
| | - Soomin Kim
- Department of Materials Science and Engineering, Korea University, Anam-dong, Seongbuk-gu, Seoul 137-713, Korea.
| | - Yoonmook Kang
- KU KIST Green School, Korea University, Anam-dong, Seongbuk-gu, Seoul 137-713, Korea
| | - Hae-seok Lee
- Department of Materials Science and Engineering, Korea University, Anam-dong, Seongbuk-gu, Seoul 137-713, Korea.
| | - Jeounghee Park
- Department of Chemistry, Korea University, Jochiwon 339-700, Korea
| | - Yongseok Jun
- Department of Materials Chemistry and Engineering, Konkuk University, Hwayang, Gwangjin, Seoul 143-701, Korea.
| | - Donghwan Kim
- Department of Materials Science and Engineering, Korea University, Anam-dong, Seongbuk-gu, Seoul 137-713, Korea.
| |
Collapse
|
27
|
Xu W, Mu B, Wang A. Facile fabrication of well-defined microtubular carbonized kapok fiber/NiO composites as electrode material for supercapacitor. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.02.072] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
28
|
Belekoukia M, Ramasamy MS, Yang S, Feng X, Paterakis G, Dracopoulos V, Galiotis C, Lianos P. Electrochemically exfoliated graphene/PEDOT composite films as efficient Pt-free counter electrode for dye-sensitized solar cells. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.02.073] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
29
|
Gao Z, Wang L, Chang J, Liu X, Wu D, Xu F, Guo Y, Jiang K. Nitrogen doped porous graphene as counter electrode for efficient dye sensitized solar cell. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2015.12.008] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
30
|
Wang X, Zhang L, Zhang Z, Yu A, Wu P. Growth of 3D hierarchical porous NiO@carbon nanoflakes on graphene sheets for high-performance lithium-ion batteries. Phys Chem Chem Phys 2016; 18:3893-9. [DOI: 10.1039/c5cp06903c] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nickelocene was used as the precursor for both NiO and carbon to construct a 3D hierarchical graphene based nanocomposite.
Collapse
Affiliation(s)
- Xiongwei Wang
- State Key Laboratory of Molecular Engineering of Polymers
- Collaborative Innovation Center of Polymers and Polymer Composite Materials
- Department of Macromolecular Science and Laboratory for Advanced Materials
- Fudan University
- Shanghai 200433
| | - Ludan Zhang
- Department of Chemistry
- Shang hai key laboratory of Molecular Catalysis and Innovative Materials
- Collaborative Innovation Center of Chemistry for energy Materials
- Institute of New Energy
- Fudan University
| | - Zehui Zhang
- State Key Laboratory of Molecular Engineering of Polymers
- Collaborative Innovation Center of Polymers and Polymer Composite Materials
- Department of Macromolecular Science and Laboratory for Advanced Materials
- Fudan University
- Shanghai 200433
| | - Aishui Yu
- Department of Chemistry
- Shang hai key laboratory of Molecular Catalysis and Innovative Materials
- Collaborative Innovation Center of Chemistry for energy Materials
- Institute of New Energy
- Fudan University
| | - Peiyi Wu
- State Key Laboratory of Molecular Engineering of Polymers
- Collaborative Innovation Center of Polymers and Polymer Composite Materials
- Department of Macromolecular Science and Laboratory for Advanced Materials
- Fudan University
- Shanghai 200433
| |
Collapse
|
31
|
Dai W, Li H, Li M, Li C, Wu X, Yang B. Electrochemical Imprinted Polycrystalline Nickel-Nickel Oxide Half-Nanotube-Modified Boron-Doped Diamond Electrode for the Detection of L-Serine. ACS APPLIED MATERIALS & INTERFACES 2015; 7:22858-22867. [PMID: 26421883 DOI: 10.1021/acsami.5b05642] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
This paper presents a novel and versatile method for the fabrication of half nanotubes (HNTs) using a flexible template-based nanofabrication method denoted as electrochemical imprinting. With use of this method, polycrystalline nickel and nickel(II) oxide (Ni-NiO) HNTs were synthesized using pulsed electrodeposition to transfer Ni, deposited by radio frequency magnetron sputtering on a porous polytetrafluoroethylene template, onto a boron-doped diamond (BDD) film. The Ni-NiO HNTs exhibited semicircular profiles along their entire lengths, with outer diameters of 50-120 nm and inner diameters of 20-50 nm. The HNT walls were formed of Ni and NiO nanoparticles. A biosensor for the detection of L-serine was fabricated using a BDD electrode modified with Ni-NiO HNTs, and the device demonstrated satisfactory analytical performance with high sensitivity (0.33 μA μM(-1)) and a low limit of detection (0.1 μM). The biosensor also exhibited very good reproducibility and stability, as well as a high anti-interference ability against amino acids such as L-leucine, L-tryptophan, L-cysteine, L-phenylalanine, L-arginine, and L-lysine.
Collapse
Affiliation(s)
- Wei Dai
- School of Precision Instrument and Optoelectronics Engineering, Tianjin University , Tianjin 300072, P.R. China
| | | | | | | | | | | |
Collapse
|
32
|
Liu T, Chai H, Jia D, Su Y, Wang T, Zhou W. Rapid microwave-assisted synthesis of mesoporous NiMoO4 nanorod/reduced graphene oxide composites for high-performance supercapacitors. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.07.175] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
33
|
Balasingam SK, Jun Y. Recent Progress on Reduced Graphene Oxide-Based Counter Electrodes for Cost-Effective Dye-Sensitized Solar Cells. Isr J Chem 2015. [DOI: 10.1002/ijch.201400213] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
34
|
AuNP/graphene nanohybrid prepared by dry plasma reduction as a low-cost counter electrode material for dye-sensitized solar cells. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2014.12.109] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
35
|
|
36
|
Chang Q, Ma Z, Wang J, Yan Y, Shi W, Chen Q, Huang Y, Yu Q, Huang L. Graphene nanosheets@ZnO nanorods as three-dimensional high efficient counter electrodes for dye sensitized solar cells. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2014.11.074] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
37
|
Mohammadi S, Mohajerzadeh S, Gholizadeh A, Salehi F, Masoumi N. Permeation of nickel nanodots on carbon nanotubes: synthesis of 3D CNT-based nanomaterials. ACS APPLIED MATERIALS & INTERFACES 2014; 6:15352-15362. [PMID: 25154711 DOI: 10.1021/am5038565] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In this paper, we report the fabrication of three-dimensional (3D) hybrid carbon nanotubes (CNT)-based nanostructures. Secondary carbon nanotubes are grown on the hydrogenated and unzipped horizontal carbon nanotubes without any further catalyst deposition. Hydrogenation of horizontal CNTs leads to out-diffusion of Ni nanoparticles that were trapped within the walls of nanotubes during the original growth process. This out-diffusion effect, as permeation, leads to the formation of nickel dots at the surfaces of carbon nanotubes which acts as the catalyst for the growth of secondary nanotubes. By controlling the secondary growth condition, a variety of 3D structures could be achieved. The permeation effect and the evolution of secondary nanostructures are studied extensively by means of scanning electron microscopy, transmission electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction analysis.
Collapse
Affiliation(s)
- Somayeh Mohammadi
- Nano-Electronic Center of Excellence, Thin Film and Nano-Electronic Lab, School of Electrical and Computer Engineering, University of Tehran , Tehran 14395/515, Iran
| | | | | | | | | |
Collapse
|
38
|
Wang Y, Li L, An C, Wang Y, Chen C, Jiao L, Yuan H. Facile synthesis of TiN decorated graphene and its enhanced catalytic effects on dehydrogenation performance of magnesium hydride. NANOSCALE 2014; 6:6684-6691. [PMID: 24817573 DOI: 10.1039/c4nr00474d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
TiN@rGO nanohybrids were successfully synthesized by a simple "urea glass" technique. Experimental results demonstrated that TiN nanocrystals, with an average particle size of 20 nm, were uniformly anchored onto highly reduced graphene nanosheets. The as-synthesized TiN@rGO nanohybrids showed a porous planar-like structure, which had a large surface area of 177 m(2) g(-1). More importantly, the as-prepared TiN@rGO hybrids showed enhanced catalytic effects on the dehydrogenation of MgH2. The dehydrogenation thermodynamics and kinetics of the MgH2-TiN@rGO composites were systematically investigated and some significant improvements were confirmed. It was found that the 10 wt% TiN@rGO doped MgH2 sample started to release hydrogen at about 167 °C, and roughly 6.0 wt% hydrogen was released within 18 min when isothermally heated to 300 °C. In contrast, the onset dehydrogenation temperature of the pure MgH2 sample was about 307 °C, and only 3.5 wt% hydrogen was released even after 120 min of heating under identical conditions. In addition, the catalytic mechanism of TiN@rGO on the dehydrogenation of MgH2 was discussed using the Johnson-Mehl-Avrami (JMA) model and X-ray diffraction equipment.
Collapse
Affiliation(s)
- Ying Wang
- Institute of New Energy Material Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Key Laboratory of Advanced Energy Materials Chemistry (MOE), Nankai University, Tianjin 300071, P. R. China.
| | | | | | | | | | | | | |
Collapse
|
39
|
Chang Q, Wang Z, Wang J, Yan Y, Ma Z, Zhu J, Shi W, Chen Q, Yu Q, Huang L. Graphene nanosheets inserted by silver nanoparticles as zero-dimensional nanospacers for dye sensitized solar cells. NANOSCALE 2014; 6:5410-5415. [PMID: 24710127 DOI: 10.1039/c3nr06340b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Three-dimensional Ag nanoparticle/GNs (Ag/GNs) hybrids as highly efficient counter electrode (CE) materials for dye sensitized solar cells (DSSCs) is described, highlighting the Ag nanoparticles as zero-dimensional nanospacers inserting into GNs to lift the interspacing layer between individual GNs. It is demonstrated that, when the hybrids are used as CE materials for DSSCs, compared to their pure GNs, Ag/GNs hybrids without agglomerates have a significant improvement in their electrochemical properties such as high current density, narrow peak-to-peak separation (Epp) and low charge transfer resistance (RCT). The enhancement of electrochemical performance can be attributed to the increased electrode conductivity, an extended interlayer distance and the reduction of the restacking of graphene sheets due to the insertion of metallic Ag nanoparticles into GNs. The DSSC with this hybrid CE exhibited an energy conversion efficiency (η) of 7.72% with an open circuit voltage (VOC), short circuit photocurrent density (JSC), and fill factor (FF) of 732 mV, 14.67 mA cm(-2), and 71.8%, respectively.
Collapse
Affiliation(s)
- Quanhong Chang
- Department of Opto-electric Information Materials and Quantum Devices, School of Materials Science and Engineering, Harbin Institute of Technology, 150001 Harbin, China.
| | | | | | | | | | | | | | | | | | | |
Collapse
|