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Li W, Chen D, Min C, Ma X, Yang X, Wang J. Atomically Engineered Chlorine Coordination of Iron in Active Centers for Selectively Catalytic H 2O 2 Decomposition Toward Efficient Antitumor-Specific Therapy. Adv Healthc Mater 2024:e2401267. [PMID: 39221675 DOI: 10.1002/adhm.202401267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2024] [Revised: 08/11/2024] [Indexed: 09/04/2024]
Abstract
The intervention of endogenous H2O2 via nanozymes provides a potential antitumor-specific therapy; however, the role of the nanozyme structure in relation to the selective decomposition of H2O2 to hydroxyl radicals (•OH) is yet to be fully understood, which limits the development of this therapeutic approaches. Herein, an iron single-atom nanozyme (Fe─N2Cl2─C SAzyme) is reported, which is prepared through precise Fe─Cl coordination based on the construction of a characteristic Fe-containing molecule. Fe─N2Cl2─C exhibits efficient catalytic H2O2 decomposition (2.19 × 106 mm-1 s-1), which is the highest among reported SAzymes. More importantly, it is found that H2O2 selectively decomposed into •OH on the Fe─N2Cl2─C surface, which is attributable to the d orbitals of the Fe active center matching the O-2p electrons of the adsorbed hydroxide (*OH) intermediate. Fe─N2Cl2─C is strongly cytotoxic toward a variety of cancer-cell lines in vitro but not to normal cells. Furthermore, Fe─N2Cl2─C shows an outstanding specific therapeutic effect in vivo; it efficiently destroys solid malignant tumors without injuring normal tissue. Altogether, these findings highlight the selective catalytic decomposition of H2O2 to •OH, which is achieved by engineering the active center on the atomic level, thereby providing an avenue for the development of specific nanomedicines with efficient antitumor activities.
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Affiliation(s)
- Wei Li
- School of Chemical Sciences and Technology, Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, Yunnan University, Kunming, 650091, China
| | - Daomei Chen
- School of Materials and Energy, Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, Yunnan University, Kunming, 650091, China
| | - Chungang Min
- Research Center for Analysis and Measurement, Kunming University of Science and Technology, Kunming, 650093, China
| | - Xiaoqian Ma
- School of Chemical Sciences and Technology, Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, Yunnan University, Kunming, 650091, China
| | - Xikun Yang
- Research Center for Analysis and Measurement, Kunming University of Science and Technology, Kunming, 650093, China
| | - Jiaqiang Wang
- School of Chemical Sciences and Technology, Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, Yunnan University, Kunming, 650091, China
- School of Materials and Energy, Yunnan Province Engineering Research Center of Photocatalytic Treatment of Industrial Wastewater, Yunnan University, Kunming, 650091, China
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2
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Li F, Guo S, Shi J, An Q. Flexible Composites for Piezocatalysis. Chempluschem 2023; 88:e202300324. [PMID: 37669420 DOI: 10.1002/cplu.202300324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 09/02/2023] [Accepted: 09/04/2023] [Indexed: 09/07/2023]
Abstract
Despite piezoelectric materials have a long history of application, piezoelectric catalysis has continued to be a hot topic in recent years. Flexible piezoelectric materials have just emerged in recent years due to their versatility and designability. In this paper, we review the recent advances in flexible piezoelectric materials for catalysis, discuss the fundamentals of the catalytic properties of composite materials, and detail the typical structures of these materials. We pay special attention to the types of filler in flexible piezoelectric composites, their role and the interaction between the particles and the flexible substrate. Notable examples of flexible piezoelectric materials for organic pollutants degradation, enhanced piezo-photocatalysis and antibacterial applications are also presented. Finally, we present key issues and future prospects for the development of flexible piezoelectric catalysts.
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Affiliation(s)
- Fujing Li
- College of Materials Science and Engineering, China University of Geosciences, Beijing, No.29 Xueyuan Road, Haidian District, Beijing, China
| | - Sufang Guo
- College of Materials Science and Engineering, China University of Geosciences, Beijing, No.29 Xueyuan Road, Haidian District, Beijing, China
| | - Jing Shi
- College of Materials Science and Engineering, China University of Geosciences, Beijing, No.29 Xueyuan Road, Haidian District, Beijing, China
| | - Qi An
- College of Materials Science and Engineering, China University of Geosciences, Beijing, No.29 Xueyuan Road, Haidian District, Beijing, China
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3
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Hu X, Xu Y, Liu S, Gudda FO, Ling W, Qin C, Gao Y. Graphene Quantum Dots Nonmonotonically Influence the Horizontal Transfer of Extracellular Antibiotic Resistance Genes via Bacterial Transformation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2301177. [PMID: 37144438 DOI: 10.1002/smll.202301177] [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: 02/09/2023] [Revised: 04/10/2023] [Indexed: 05/06/2023]
Abstract
Graphene quantum dots (GQDs) coexist with antibiotic resistance genes (ARGs) in the environment. Whether GQDs influence ARG spread needs investigation, since the resulting development of multidrug-resistant pathogens would threaten human health. This study investigates the effect of GQDs on the horizontal transfer of extracellular ARGs (i.e., transformation, a pivotal way that ARGs spread) mediated by plasmids into competent Escherichia coli cells. GQDs enhance ARG transfer at lower concentrations, which are close to their environmental residual concentrations. However, with further increases in concentration (closer to working concentrations needed for wastewater remediation), the effects of enhancement weaken or even become inhibitory. At lower concentrations, GQDs promote the gene expression related to pore-forming outer membrane proteins and the generation of intracellular reactive oxygen species, thus inducing pore formation and enhancing membrane permeability. GQDs may also act as carriers to transport ARGs into cells. These factors result in enhanced ARG transfer. At higher concentrations, GQD aggregation occurs, and aggregates attach to the cell surface, reducing the effective contact area of recipients for external plasmids. GQDs also form large agglomerates with plasmids and thus hindering ARG entrance. This study could promote the understanding of the GQD-caused ecological risks and benefit their safe application.
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Affiliation(s)
- Xiaojie Hu
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, P. R. China
| | - Yanxing Xu
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, P. R. China
| | - Si Liu
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, P. R. China
| | - Fredrick Owino Gudda
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, P. R. China
| | - Wanting Ling
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, P. R. China
| | - Chao Qin
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, P. R. China
| | - Yanzheng Gao
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, 210095, P. R. China
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4
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Boahen EK, Pan B, Kweon H, Kim JS, Choi H, Kong Z, Kim DJ, Zhu J, Ying WB, Lee KJ, Kim DH. Ultrafast, autonomous self-healable iontronic skin exhibiting piezo-ionic dynamics. Nat Commun 2022; 13:7699. [PMID: 36509757 PMCID: PMC9744819 DOI: 10.1038/s41467-022-35434-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 12/02/2022] [Indexed: 12/15/2022] Open
Abstract
The self-healing properties and ionic sensing capabilities of the human skin offer inspiring groundwork for the designs of stretchable iontronic skins. However, from electronic to ionic mechanosensitive skins, simultaneously achieving autonomously superior self-healing properties, superior elasticity, and effective control of ion dynamics in a homogeneous system is rarely feasible. Here, we report a Cl-functionalized iontronic pressure sensitive material (CLiPS), designed via the introduction of Cl-functionalized groups into a polyurethane matrix, which realizes an ultrafast, autonomous self-healing speed (4.3 µm/min), high self-healing efficiency (91% within 60 min), and mechanosensitive piezo-ionic dynamics. This strategy promotes both an excellent elastic recovery (100%) and effective control of ion dynamics because the Cl groups trap the ions in the system via ion-dipole interactions, resulting in excellent pressure sensitivity (7.36 kPa-1) for tactile sensors. The skin-like sensor responds to pressure variations, demonstrating its potential for touch modulation in future wearable electronics and human-machine interfaces.
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Affiliation(s)
- Elvis K Boahen
- Department of Chemical Engineering, Hanyang University, Seoul, 04763, Republic of Korea
| | - Baohai Pan
- Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon, 34134, Republic of Korea
| | - Hyukmin Kweon
- Department of Chemical Engineering, Hanyang University, Seoul, 04763, Republic of Korea
| | - Joo Sung Kim
- Department of Chemical Engineering, Hanyang University, Seoul, 04763, Republic of Korea
| | - Hanbin Choi
- Department of Chemical Engineering, Hanyang University, Seoul, 04763, Republic of Korea
| | - Zhengyang Kong
- Department of Chemical Engineering, Hanyang University, Seoul, 04763, Republic of Korea
| | - Dong Jun Kim
- Department of Chemical Engineering, Hanyang University, Seoul, 04763, Republic of Korea
| | - Jin Zhu
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, People's Republic of China
| | - Wu Bin Ying
- Department of Chemical Engineering, Hanyang University, Seoul, 04763, Republic of Korea.
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, People's Republic of China.
| | - Kyung Jin Lee
- Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon, 34134, Republic of Korea.
| | - Do Hwan Kim
- Department of Chemical Engineering, Hanyang University, Seoul, 04763, Republic of Korea.
- Institute of Nano Science and Technology, Hanyang University, Seoul, 04763, Republic of Korea.
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5
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Shaban M. In-Situ SERS Detection of Hg 2+/Cd 2+ and Congo Red Adsorption Using Spiral CNTs/Brass Nails. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3778. [PMID: 36364554 PMCID: PMC9653861 DOI: 10.3390/nano12213778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 10/19/2022] [Accepted: 10/24/2022] [Indexed: 06/16/2023]
Abstract
Brass spiral nails were functionalized with CoFe2O4 nanoparticles and utilized as a substrate for the growth of extremely long CNTs with helical structures and diameters smaller than 20 nm. Different methods were used to characterize the grown CNTs' structures and morphologies. The characteristic Raman peaks of CNTs were amplified four times after being uploaded on the spiral nail, making the substrates for surface-enhanced Raman spectroscopy (SERS) more sensitive. To detect Hg2+ and Cd2+ at concentrations ranging from 1 to 1000 ppb, a CNT/spiral brass nail was used as a SERS substrate. The proposed sensor demonstrated high sensitivity and selectivity between these heavy metal ions. As a result, the proposed CNTs/spiral brass sensor can be an effective tool for identifying heavy metal ions in aqueous solutions. In addition, Congo red (CR) adsorption as a function of initial dye concentration and contact time was investigated. For CR dye solutions with concentrations of 5, 10, and 20 mg/L, respectively, the highest removal percentage was determined to be ~99.9%, 85%, and 77%. According to the kinetics investigation, the pseudo-first-order and pseudo-second-order models effectively handle CR adsorption onto CNTs/spiral nails. The increase in the dye concentration from 5 ppm to 20 ppm causes the rate constant to drop from 0.053 to 0.040 min-1. Therefore, our sample can be employed for both the effective degradation of CR dye from wastewater and the detection of heavy metals.
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Affiliation(s)
- Mohamed Shaban
- Department of Physics, Faculty of Science, Islamic University of Madinah, Madinah 42351, Saudi Arabia
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6
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Humbe SS, Joshi GM, Deshmukh R, Kaleemulla S, E D. Quantification of pre and post air plasma defected graphene oxide dispersed polymer blends for high dielectric applications. NEW J CHEM 2022. [DOI: 10.1039/d1nj05595j] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polymer nano blends were more in demand for various domestic and industrial applications. In the present investigation, we modified the Polyvinylidene fluoride (PVDF)/Polysulfone (PSF) polymer blends by dispersion of pre...
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7
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Bismaleimide resins modified by an allyl ether of bio-based resveratrol with excellent halogen-free and phosphorus-free intrinsic flame retardancy and ultrahigh glass transition temperature. Polym Degrad Stab 2021. [DOI: 10.1016/j.polymdegradstab.2021.109717] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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8
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Pu L, Zhang J, Wang C, Pan Y, Zhao Y, Bu Y, Zhang Q, Pan B, Gao G. Membrane cleaning strategy via in situ oscillation driven by piezoelectricity. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2021.119722] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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9
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Synergistic Enhanced Thermal Conductivity and Dielectric Constant of Epoxy Composites with Mesoporous Silica Coated Carbon Nanotube and Boron Nitride Nanosheet. MATERIALS 2021; 14:ma14185251. [PMID: 34576475 PMCID: PMC8471898 DOI: 10.3390/ma14185251] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 08/26/2021] [Accepted: 08/30/2021] [Indexed: 12/28/2022]
Abstract
Dielectric materials with high thermal conductivity and outstanding dielectric properties are highly desirable for advanced electronics. However, simultaneous integration of those superior properties for a material remains a daunting challenge. Here, a multifunctional epoxy composite is fulfilled by incorporation of boron nitride nanosheets (BNNSs) and mesoporous silica coated multi-walled carbon nanotubes (MWCNTs@mSiO2). Owing to the effective establishment of continuous thermal conductive network, the obtained BNNSs/MWCNTs@mSiO2/epoxy composite exhibits a high thermal conductivity of 0.68 W m-1 K-1, which is 187% higher than that of epoxy matrix. In addition, the introducing of mesoporous silica dielectric layer can screen charge movement to shut off leakage current between MWCNTs, which imparts BNNSs/MWCNTs@mSiO2/epoxy composite with high dielectric constant (8.10) and low dielectric loss (<0.01) simultaneously. It is believed that the BNNSs/MWCNTs@mSiO2/epoxy composites with admirable features have potential applications in modern electronics.
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10
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Rajabi H, Jafari SM, Feizi J, Ghorbani M, Mohajeri SA. Surface-decorated graphene oxide sheets with nanoparticles of chitosan-Arabic gum for the separation of bioactive compounds: A case study for adsorption of crocin from saffron extract. Int J Biol Macromol 2021; 186:1-12. [PMID: 34242644 DOI: 10.1016/j.ijbiomac.2021.07.037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 05/10/2021] [Accepted: 07/04/2021] [Indexed: 12/01/2022]
Abstract
This work provides a new perception toward the application of the graphenic-biopolymeric composites as a solid-bed for separation and purification of bioactive compounds. Graphene oxide nanocomposites with functionalized sheets by soluble and insoluble nanocomplexes of chitosan and Arabic gum, were successfully synthesized and employed for the adsorption and purification of crocin, a nutraceutical from saffron. The composites exhibited a nanostructured scaffold with a particle size of 10 nm and experienced an unprecedented increase in the surface area by about 300% and improved d-spacing sheets by 17%. The optimum conditions for crocin separation were temperature = 318 K, stirring rate = 300 rpm, initial concentration = 100 mg L-1 and pH = 6. Under these conditions, the nanocomposites separated 99.1% of crocin in an equilibrium time of 30 min. The adsorption data were best represented by Freundlich isotherm and pseudo-second-order kinetic models. The thermodynamic studies indicated that the crocin adsorption on nanocomposites was an endothermic, spontaneous and physisorption process. The high-performance liquid chromatography (HPLC) analysis revealed that produced nanocomposites adsorbed crocin efficiently from saffron extract with a purity similar to the standard sample. The possible interaction mechanisms between crocin and nanocomposites were electrostatic interactions and hydrogen bonding.
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Affiliation(s)
- Hamid Rajabi
- Faculty of Food Science and Technology, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
| | - Seid Mahdi Jafari
- Faculty of Food Science and Technology, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran.
| | - Javad Feizi
- Department of Food Quality Control and Safety, Research Institute of Food Science and Technology, Mashhad, Iran
| | - Mohammad Ghorbani
- Faculty of Food Science and Technology, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran
| | - Seyed Ahmad Mohajeri
- Faculty of pharmaceuticals, Mashhad University of Medical Sciences, Mashhad, Iran
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11
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Tang X, Fan T, Wang C, Zhang H. Halogen Functionalization in the 2D Material Flatland: Strategies, Properties, and Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2005640. [PMID: 33783132 DOI: 10.1002/smll.202005640] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 10/12/2020] [Indexed: 06/12/2023]
Abstract
Given the electronegativity and bonding environment of halogen elements, halogenation (i.e., fluorination, chlorination, bromination, and iodination) serves as a versatile strategy for chemical modifications of materials. The combination of halogens and 2D materials has triggered extensive interests since the first report on graphene fluorination in 2008. Subsequently, scholars consistently conduct pre-, in-process, or posthalogenation modifications of emerging 2D materials to achieve desired properties and broad device applications. They also continuously explore the role of halogens in 2D material functionalization. The multiple advantages introduced by halogen decoration make 2D materials outstanding from each subclass. In this review, an overall retrospect is provided on the research advances in the area of 2D material halogenation, including experimental halogenation strategies, halogen-triggered novel physics and properties, and advanced applications across the studied objects. Future research directions in this area are also proposed.
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Affiliation(s)
- Xian Tang
- School of Nuclear Science and Technology, University of South China, Hengyang, 421001, China
| | - Touwen Fan
- School of Nuclear Science and Technology, University of South China, Hengyang, 421001, China
| | - Cong Wang
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
| | - Han Zhang
- International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, China
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12
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Rajabi H, Jafari SM, Feizy J, Ghorbani M, Mohajeri SA. Preparation and characterization of 3D graphene oxide nanostructures embedded with nanocomplexes of chitosan- gum Arabic biopolymers. Int J Biol Macromol 2020; 162:163-174. [DOI: 10.1016/j.ijbiomac.2020.06.076] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 06/03/2020] [Accepted: 06/08/2020] [Indexed: 12/20/2022]
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13
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Curing behaviors and properties of epoxy resins with para-hexatomic ring blocks: Excellent comprehensive performances of tetrafluorophenyl. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122828] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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14
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15
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Ul Haq Y, Murtaza I, Mazhar S, Ahmad N, Qarni AA, Ul Haq Z, Khan SA, Iqbal M. Investigation of improved dielectric and thermal properties of ternary nanocomposite PMMA/MXene/ZnO fabricated by in‐situ bulk polymerization. J Appl Polym Sci 2020. [DOI: 10.1002/app.49197] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Yasir Ul Haq
- Spintronics Laboratory, Department of PhysicsInternational Islamic University Islamabad Pakistan
| | - Imran Murtaza
- Spintronics Laboratory, Department of PhysicsInternational Islamic University Islamabad Pakistan
| | - Sadaf Mazhar
- Institute of Chemical Sciences, University of Peshawar Peshawar Pakistan
| | - Naeem Ahmad
- Spintronics Laboratory, Department of PhysicsInternational Islamic University Islamabad Pakistan
| | - Awais A. Qarni
- Department of ChemistryChemnitz Technical University Chemnitz Germany
| | - Zeeshan Ul Haq
- Department of PhysicsUniversity of Peshawar Peshawar Pakistan
| | - Shahid A. Khan
- Institute of Chemical Sciences, University of Peshawar Peshawar Pakistan
| | - Mahmood Iqbal
- Pakistan Council of Scientific and Industrial Research Laboratories Complex Peshawar Pakistan
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16
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Batool S, Gill R, Ma C, Reddy GCS, Guo W, Hu Y. Epoxy‐based multilayers for flame resistant flexible polyurethane foam (FPUF). J Appl Polym Sci 2020. [DOI: 10.1002/app.48890] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Sadia Batool
- Department of Environmental SciencesFatima Jinnah Women University The Mall, Rawalpindi 46000 Punjab Pakistan
- State Key Laboratory of Fire ScienceUniversity of Science and Technology of China Hefei Anhui 23000 China
| | - Rohama Gill
- Department of Environmental SciencesFatima Jinnah Women University The Mall, Rawalpindi 46000 Punjab Pakistan
| | - Chao Ma
- State Key Laboratory of Fire ScienceUniversity of Science and Technology of China Hefei Anhui 23000 China
| | | | - Wenwen Guo
- State Key Laboratory of Fire ScienceUniversity of Science and Technology of China Hefei Anhui 23000 China
| | - Yuan Hu
- State Key Laboratory of Fire ScienceUniversity of Science and Technology of China Hefei Anhui 23000 China
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17
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Ling N, Wang Z, Kim S, Oh SH, Park JH, Shin H, Cho S, Yang H. In Operando Stacking of Reduced Graphene Oxide for Active Hydrogen Evolution. ACS APPLIED MATERIALS & INTERFACES 2019; 11:43460-43465. [PMID: 31661237 DOI: 10.1021/acsami.9b11619] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Despite the remarkable electronic and mechanical properties of graphene, improving the catalytic activity of the atomically flat, inert, and stable carbon network remains a challenging issue in both fundamental and application studies. In particular, the adsorption of most molecules and ions, including hydrogen (H2 or H+), on graphene is not favorable, underlining the challenge for an efficient electrochemical catalytic reaction on graphene. Various defects, edges, and functionalization have been suggested to resolve the catalytic issue in graphene, but cost-effectiveness and active catalysis with graphene have not been achieved yet. Here, we introduce dynamic stacking of reduced graphene oxide (rGO) with spontaneously generated hydrogen bubbles to form an efficient electrochemical catalyst with a graphene derivative; the in operando stacking of rGO, without using a high-temperature-based heteroatom doping process or plasma treatment, creates a large catalytic surface area with optimized edges and acidic groups in the rGO. Thus, the uniquely formed stable carbon network achieves active hydrogen evolution with a Tafel slope of 39 mV·dec-1 and a double layer capacitance of 12.41 mF·cm-2, which breaks the conventional limit of graphene-based catalysis, suggesting a promising strategy for metal-free catalyst engineering and hydrogen production.
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Affiliation(s)
- Ning Ling
- Department of Energy Science , Sungkyunkwan University , Suwon 16419 , Korea
| | - Zhen Wang
- Department of Energy Science , Sungkyunkwan University , Suwon 16419 , Korea
| | - Sera Kim
- Department of Energy Science , Sungkyunkwan University , Suwon 16419 , Korea
| | - Sang Ho Oh
- Department of Energy Science , Sungkyunkwan University , Suwon 16419 , Korea
| | - Jong Hyeok Park
- Department of Chemical and Biomolecular Engineering , Yonsei University , Seoul 120-749 , Korea
| | - Hyunjung Shin
- Department of Energy Science , Sungkyunkwan University , Suwon 16419 , Korea
| | - Suyeon Cho
- Division of Chemical Engineering and Materials Science , Ewha Womans University , Seoul 03760 , Korea
| | - Heejun Yang
- Department of Energy Science , Sungkyunkwan University , Suwon 16419 , Korea
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18
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Comparative study of Cl,N-Cdots and N-Cdots and application for trinitrophenol and ClO - sensor and cell-imaging. Anal Chim Acta 2019; 1091:76-87. [PMID: 31679577 DOI: 10.1016/j.aca.2019.09.019] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Accepted: 09/05/2019] [Indexed: 11/20/2022]
Abstract
To understand the effect of Cl doping in carbon dots, nitrogen-doped carbon dots (N-Cdots) and nitrogen and chlorine dual-doped carbon dots (Cl,N-Cdots) were fabricated by high-temperature carbonization and low-temperature concentrated acid (HCl) acidification of dried shaddock peel, respectively. The quantum yield of Cl,N-Cdots is about four times of that of N-Cdots and the size of Cl,N-Cdots is smaller than that of N-Cdots. Furthermore, since trinitrophenol (PA) and ClO- could effectively quench the fluorescence of Cl,N-Cdots, the fluorescence sensors for determining PA and ClO- was constructed, respectively. The linear range of PA and ClO- are 0.9-90 μM and 3.24-216 μM with the limit of detection of 37.1 nM and 2.88 μM, respectively. The proposed sensor was used to detect PA in Taiyuan tap water, Wutai tap water, Wutai rain water and Wutai river water samples with encouraging results. The as-constructed sensor was also used to detect ClO- in Taiyuan tap water and commercial disinfectants. Last but not least, Cl,N-Cdots was employed as an agent for A549 and HeLa cell-imaging, possessing optimal imaging effect and ultra-low cytotoxicity. Our results suggested that Cl,N-Cdots has promising applications in sensing, water monitoring, commodity supervision and cell-imaging.
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19
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Zhang Y, Tong C, Ma Z, Lu L, Fu H, Pan S, Tong W, Li X, Zhang Y, An Q. A self-powered delivery substrate boosts active enzyme delivery in response to human movements. NANOSCALE 2019; 11:14372-14382. [PMID: 31332411 DOI: 10.1039/c9nr04673a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Stimulated drug releases in response to human movements are highly appealing in medical therapy and various daily uses. However, the design of a mechanically responsive substrate that presents high delivery capacities and can also preserve the activities of sensitive molecules such as enzymes is still challenging. Taking advantage of the recent development in effective piezoelectric flexible films and in molecular delivery devices, we propose a composite delivery substrate that preserves enzyme activities and enhances molecular delivery in response to human movements such as finger presses or massages. The substrate is achieved by combining two parts, which are the energy converting unit and the molecular loading and releasing unit. The energy converting unit is a piezoelectric-dielectric flexible composite film that produces enhanced electricity and preserves the electricity longer compared to a pure piezoelectric polymer. The molecular delivery unit is a layer-by-layer multilayer containing mesoporous silica particles that are assembled at pH 9 but used in neutral solutions. The releases of molecules including small molecules, peptides, and proteins are all accelerated in response to finger presses irrespective of the signs or densities of their charges. More importantly, the enzyme CAT preserves its activity after release from the composite substrates, meaning that the CAT-loaded (PAH/MS)n(PAH/DAS)n@rGO-TFB/PVDF-HFP composite substrate holds promise as a self-powered soothing pad that effectively removes residue H2O2.
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Affiliation(s)
- Yi Zhang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Sciences and Technology, China University of Geosciences, Beijing, 100083, China.
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20
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Gangireddy CSR, Wang X, Kan Y, Song L, Hu Y. Synthesis of a novel DOPO‐based polyphosphoramide with high char yield and its application in flame‐retardant epoxy resins. POLYM INT 2019. [DOI: 10.1002/pi.5784] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
| | - Xin Wang
- State Key Laboratory of Fire ScienceUniversity of Science and Technology of China Hefei China
| | - Yongchun Kan
- State Key Laboratory of Fire ScienceUniversity of Science and Technology of China Hefei China
| | - Lei Song
- State Key Laboratory of Fire ScienceUniversity of Science and Technology of China Hefei China
| | - Yuan Hu
- State Key Laboratory of Fire ScienceUniversity of Science and Technology of China Hefei China
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21
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Joseph AM, Nagendra B, Surendran KP, Gowd EB. Sustainable in Situ Approach to Covalently Functionalize Graphene Oxide with POSS Molecules Possessing Extremely Low Dielectric Behavior. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:4672-4681. [PMID: 30832479 DOI: 10.1021/acs.langmuir.9b00028] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Incorporation of multifunctional inorganic additives into the commercial polymers still stands as the most captivating and effective way to realize new-generation electronic components. Here, we introduce a simple, cost-effective, and environmentally benign method to covalently functionalize graphene oxide (GO) with vinyl- and aminopropyl-functionalized hybrid silica spheres with a polyhedral oligomeric silsesquioxane (POSS)-siloxane composition. The reaction has been carried out in a mixture of ethanol and water (used as a medium) at ambient conditions with silane precursors. Later, the synthesized hybrid material has been tested for its dielectric properties after blending with syndiotactic polystyrene, a commercially available insulating semicrystalline polymer. It was observed that the dielectric constant decreases with the addition of GOPOSS up to 1.85 with a dielectric loss of 0.02 at 5 GHz. Significant improvements in the thermal properties of the composites were verified with minimal filler loading.
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Affiliation(s)
- Angel Mary Joseph
- Materials Science and Technology Division , CSIR-National Institute for Interdisciplinary Science and Technology , Trivandrum 695 019 , Kerala , India
- Academy of Scientific and Innovative Research (AcSIR) , Ghaziabad 201 002 , India
| | - Baku Nagendra
- Materials Science and Technology Division , CSIR-National Institute for Interdisciplinary Science and Technology , Trivandrum 695 019 , Kerala , India
- Academy of Scientific and Innovative Research (AcSIR) , Ghaziabad 201 002 , India
| | - K P Surendran
- Materials Science and Technology Division , CSIR-National Institute for Interdisciplinary Science and Technology , Trivandrum 695 019 , Kerala , India
- Academy of Scientific and Innovative Research (AcSIR) , Ghaziabad 201 002 , India
| | - E Bhoje Gowd
- Materials Science and Technology Division , CSIR-National Institute for Interdisciplinary Science and Technology , Trivandrum 695 019 , Kerala , India
- Academy of Scientific and Innovative Research (AcSIR) , Ghaziabad 201 002 , India
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22
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Mu X, Zhan J, Wang J, Cai W, Yuan B, Song L, Hu Y. A novel and efficient strategy to exfoliation of covalent organic frameworks and a significant advantage of covalent organic frameworks nanosheets as polymer nano-enhancer: High interface compatibility. J Colloid Interface Sci 2019; 539:609-618. [DOI: 10.1016/j.jcis.2018.12.103] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 12/24/2018] [Accepted: 12/28/2018] [Indexed: 11/30/2022]
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23
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Jimenez MJM, de Oliveira RF, Shimizu FM, Bufon CCB, Rodrigues V, Gobbi ÂL, Piazzetta MHO, Riul A. Poole-Frenkel emission on functionalized, multilayered-packed reduced graphene oxide nanoplatelets. NANOTECHNOLOGY 2018; 29:505703. [PMID: 30215613 DOI: 10.1088/1361-6528/aae18e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The unique electronic, mechanical and optical properties of graphene make it a remarkable 2D material, widely explored in a plethora of applications. However, graphene zero-bandgap and the production of defect-free pristine graphene in large areas still limit some applications. To circumvent these issues, graphene-derived 2D materials have arisen as attractive candidates for low-dimensional systems, which requires a better comprehension of their properties. Here, we report a detailed investigation of the conduction mechanisms of two functionalized reduced graphene oxides (rGOs) nanoplatelets, named GPAH and GPSS. The functionalized rGO nanoplatelets were bottom-up assembled via the layer-by-layer technique, enabling molecular-level thickness control of nanostructures with well-defined composition and structure. For the reported multilayered GPAH/GPSS films the charge carriers followed Mott's law, presenting a typical conduction behavior of 2D systems described by the Poole-Frenkel model. The multilayered GPAH/GPSS nanostructure presented a conductivity of 10-4 S cm-1, optical bandgap of ∼3.3 eV and a relative dielectric permittivity (ε r) of 6.4. Temperature-dependent I-V measurements indicated a strong variation of ε r below the critical temperature (T C = 237 K), associated with a high dipole reorientation in the formed GPAH/GPSS nanostructure. All these characteristics make the GPAH/GPSS nanocomposite attractive for graphene-oriented applications, such as electronic devices.
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Affiliation(s)
- Mawin J M Jimenez
- Department of Applied Physics, 'Gleb Wataghin' Institute of Physics (IFGW), University of Campinas (UNICAMP), 13083-970, Campinas, SP, Brazil
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24
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Ikram M, Qayyum H, Ali S, Tan Z, Ahmad M, Jin X. Hydrothermal-hot press processed SiO2-rGO hybrid with enhanced physical properties. J SOLID STATE CHEM 2018. [DOI: 10.1016/j.jssc.2018.06.030] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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25
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Pawar S, Arjmand M, Pötschke P, Krause B, Fischer D, Bose S, Sundararaj U. Tuneable Dielectric Properties Derived from Nitrogen-Doped Carbon Nanotubes in PVDF-Based Nanocomposites. ACS OMEGA 2018; 3:9966-9980. [PMID: 31459125 PMCID: PMC6645280 DOI: 10.1021/acsomega.8b01239] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 08/14/2018] [Indexed: 06/10/2023]
Abstract
Nitrogen-doped multiwall carbon nanotubes (N-MWNTs) with different structures were synthesized by employing chemical vapor deposition and changing the argon/ethane/nitrogen gas precursor ratio and synthesis time, and broadband dielectric properties of their poly(vinylidene fluoride) (PVDF)-based nanocomposites were investigated. The structure, morphology, and electrical conductivity of synthesized N-MWNTs were assessed via Raman spectroscopy, scanning electron microscopy, transmission electron microscopy, thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy, and powder conductivity techniques. The melt compounded PVDF nanocomposites manifested significantly high real part of the permittivity (ε') along with low dissipation factor (tan δε) in 0.1 kHz to 1 MHz frequency range, suggesting use as efficient charge-storage materials. Longer synthesis time resulted in enhanced carbon purity as well as higher thermal stability, determined via TGA analysis. The inherent electrical conductivity of N-MWNTs scaled with the carbon purity. The charge-storage ability of the developed PVDF nanocomposites was commensurate with the amount of the nitrogen heteroatom (i.e., self-polarization), carbon purity, and inherent electrical conductivity of N-MWNTs and increased with better dispersion of N-MWNTs in PVDF.
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Affiliation(s)
- Shital
Patangrao Pawar
- Department
of Chemical and Petroleum Engineering, University
of Calgary, Calgary, AB, Canada T2N 1N4
| | - Mohammad Arjmand
- School
of Engineering, University of British Columbia, Kelowna, BC, Canada V1V 1V7
| | - Petra Pötschke
- Leibniz
Institute of Polymer Research Dresden (IPF), Hohe Str. 6, 01069 Dresden, Germany
| | - Beate Krause
- Leibniz
Institute of Polymer Research Dresden (IPF), Hohe Str. 6, 01069 Dresden, Germany
| | - Dieter Fischer
- Leibniz
Institute of Polymer Research Dresden (IPF), Hohe Str. 6, 01069 Dresden, Germany
| | - Suryasarathi Bose
- Department
of Materials Engineering, Indian Institute
of Science, Bangalore 560012, India
| | - Uttandaraman Sundararaj
- Department
of Chemical and Petroleum Engineering, University
of Calgary, Calgary, AB, Canada T2N 1N4
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26
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Sun X, Liu H, Yang L, Wang X, Yang W, Wei M, Liu X, Cao J, Yang J, Xing SG. Tailoring Blue-Green Double Emissions in Carbon Quantum Dots via Co-Doping Engineering by Competition Mechanism between Chlorine-Related States and Conjugated π-Domains. NANOMATERIALS (BASEL, SWITZERLAND) 2018; 8:E635. [PMID: 30134559 PMCID: PMC6163860 DOI: 10.3390/nano8090635] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 08/01/2018] [Accepted: 08/17/2018] [Indexed: 12/29/2022]
Abstract
Representing single-layer to tens of layers of graphene in a size less than 30 nm, carbon quantum dots (CQDs) is becoming an advanced multifunctional material for its unique optical, electronic, spin and photoelectric properties induced by the quantum confinement effect and edge effect. In present work, upon co-doping engineering, nitrogen and chlorine co-doped CQDs with uniquely strong blue-green double emissions are developed via a facile and one-pot hydrothermal method. The crystalline and optical properties of CQDs have been well manipulated by tuning the mole ratio of nitrogen/chlorine and the reaction time. The characteristic green emission centered at 512 nm has been verified, originating from the chlorine-related states, the other blue emissions centered at 460 nm are attributed to the conjugated π-domain. Increasing the proportion of 1,2,4-benzentriamine dihydrochloride can effectively adjust the bandgap of CQDs, mainly caused by the synergy and competition of chlorine-related states and the conjugated π-domain. Prolonging the reaction time promotes more nitrogen and chlorine dopants incorporate into CQDs, which inhibits the growth of CQDs to reduce the average size of CQDs down to 1.5 nm, so that the quantum confinement effect dominates into play. This work not only provides a candidate with excellent optical properties for heteroatoms-doped carbon materials but also benefits to stimulate the intensive studies for co-doped carbon with chlorine as one of new dopants paradigm.
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Affiliation(s)
- Xue Sun
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130013, China.
- National Demonstration Center for Experimental Physics Education, Jilin Normal University, Siping 136000, China.
| | - Huilian Liu
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130013, China.
- National Demonstration Center for Experimental Physics Education, Jilin Normal University, Siping 136000, China.
| | - Lili Yang
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130013, China.
- National Demonstration Center for Experimental Physics Education, Jilin Normal University, Siping 136000, China.
| | - Xinying Wang
- School of Engineering and Architecture, Northeast Electric Power University, Jilin 132012, China.
| | - Weiqiang Yang
- Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory of UV-Emitting Materials and Technology (Northeast Normal University), Ministry of Education, Changchun 130024, China.
| | - Maobin Wei
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130013, China.
- National Demonstration Center for Experimental Physics Education, Jilin Normal University, Siping 136000, China.
| | - Xiaoyan Liu
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130013, China.
- National Demonstration Center for Experimental Physics Education, Jilin Normal University, Siping 136000, China.
| | - Jian Cao
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130013, China.
- National Demonstration Center for Experimental Physics Education, Jilin Normal University, Siping 136000, China.
| | - Jinghai Yang
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130013, China.
- National Demonstration Center for Experimental Physics Education, Jilin Normal University, Siping 136000, China.
| | - Scott Guozhong Xing
- United Microelect Corp. Ltd., 3 Pasir Ris Dr 12, Singapore 519528, Singapore.
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Gebrekrstos A, Madras G, Bose S. Piezoelectric Response in Electrospun Poly(vinylidene fluoride) Fibers Containing Fluoro-Doped Graphene Derivatives. ACS OMEGA 2018; 3:5317-5326. [PMID: 31458741 PMCID: PMC6641698 DOI: 10.1021/acsomega.8b00237] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 05/04/2018] [Indexed: 05/21/2023]
Abstract
Herein, graphene oxide (GO) was suitably functionalized to obtain carboxylated and fluorinated GO (GOCOOH and GOF) derivatives, respectively, via the Hunsdiecker reaction. Electrospun mats of poly(vinylidene fluoride) (PVDF)/GO, PVDF/GOCOOH, and PVDF/GOF fibers were then prepared by electrospinning from well-dispersed GO derivatives. The piezoelectric coefficient (d 33), as measured using piezoelectric force measurement (PFM), enhanced by more than 2 folds with respect to the control PVDF spun mat. The piezoelectric coefficient though enhanced upon the addition of GO and GOCOOH, however, enhanced significantly in the case of GOF. For instance, a drastic increase in piezoelectric response from 30 pm V-1(electrospun neat PVDF) to 63 pm V-1 (for electrospun PVDF/GOF) was observed as revealed from PFM results. The phase transformation in these fibers was systematically investigated by various techniques such as Fourier transform infrared spectroscopy (FTIR), wide angle X-ray diffraction (XRD), Raman spectroscopy, and PFM. FTIR and XRD results revealed that the electrospun fiber mats showed predominantly β-PVDF. Interestingly, the highest β content was obtained in the presence of GOF. The drastic enhancement in β phase is due to the presence of highly electronegative fluorine. The addition of GOCOOH and GOF in PVDF not only increases the polar β phase but also changes the piezoelectric response significantly. More interestingly, PVDF/GOF films exhibited higher energy density and dielectric permittivity when compared with the control PVDF samples. These findings will help guide the researchers working in this field from both theoretical understanding and practical view point for energy storing device and charge storage electronics.
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Affiliation(s)
- Amanuel Gebrekrstos
- Department
of Chemical Engineering and Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
| | - Giridhar Madras
- Department
of Chemical Engineering and Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
| | - Suryasarathi Bose
- Department
of Chemical Engineering and Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
- E-mail:
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28
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Choi KB, Lee SM, Hwang JY, Yoon DH, Lee KH, Kim JY. Frequency-Independent and Colossal Dielectric Permittivity of Platy Alumina/Few-Layer Graphene Multilayered Composites. B KOREAN CHEM SOC 2018. [DOI: 10.1002/bkcs.11405] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ki-Beom Choi
- Icheon branch; Korea Institute of Ceramic Engineering and Technology; Icheon 17303 Korea
| | - Sung-Min Lee
- Icheon branch; Korea Institute of Ceramic Engineering and Technology; Icheon 17303 Korea
| | - Jae-yeol Hwang
- Department of Energy Science; Sungkyunkwan University; Suwon 16419 Korea
| | - Dae Ho Yoon
- Department of Advanced Materials Sciences and Engineering; Sungkyunkwan University; Suwon 16419 Korea
| | - Kyu Hyoung Lee
- Department of Nano Applied Engineering; Kangwon National University; Chuncheon 24341 Korea
| | - Jong-Young Kim
- Icheon branch; Korea Institute of Ceramic Engineering and Technology; Icheon 17303 Korea
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29
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Ikram M, Tao Z, Ye J, Qayyum HA, Sun X, Xu J. Enhanced physical properties of γ-Al 2O 3-rGO hybrids prepared by solvothermal and hot-press processing. RSC Adv 2018; 8:8329-8337. [PMID: 35542017 PMCID: PMC9078560 DOI: 10.1039/c8ra00095f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Accepted: 02/11/2018] [Indexed: 12/04/2022] Open
Abstract
In this study, a solvothermal method was employed for the first time to fabricate hybrids composed of cross-linked γ-Al2O3 nanorods and reduced graphite oxide (rGO) platelets. After calcination and hot-press processing, monoliths of Al2O3-rGO hybrids were obtained with improved physical properties. It was found that the oxygen-containing groups on graphene oxide were beneficial for the adsorption of aluminum isopropoxide, leading to a uniform dispersion of rGO with Al2O3, which was obtained by hydrolysis of aluminum isopropoxide during the solvothermal reaction. The hybrid, which was subsequently calcinated for 3 h showed electrical conductivity of 6.7 × 101 S m-1 together with 90% higher mechanical tensile strength and 80% higher thermal conductivity as compared to the bare Al2O3. In addition, the dielectric constant of the hybrid was 12 times higher than that of the bare Al2O3. In this study, the highest values of electrical conductivity (8.2 × 101 S m-1), thermal conductivity (2.53 W m-1 K-1), dielectric constant (104) and Young's modulus (3.7 GPa) were obtained for the alumina-rGO hybrid calcinated for 1 h. XRD characterization showed that an increase in calcination temperature and further hot-press processing at 900 °C led to enhanced crystallinity in the γ-Al2O3 nanorods in the hybrid, resulting in enhanced physical properties in the hybrids.
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Affiliation(s)
- Mujtaba Ikram
- Key Laboratory of Materials for Energy Conversion, Chinese Academy of Sciences, Department of Materials Science and Engineering, University of Science and Technology of China Hefei Anhui 230026 P. R. China
| | - Zhuchen Tao
- Key Laboratory of Materials for Energy Conversion, Chinese Academy of Sciences, Department of Materials Science and Engineering, University of Science and Technology of China Hefei Anhui 230026 P. R. China
| | - Jianglin Ye
- Key Laboratory of Materials for Energy Conversion, Chinese Academy of Sciences, Department of Materials Science and Engineering, University of Science and Technology of China Hefei Anhui 230026 P. R. China
| | - Hafiz Adil Qayyum
- Physics Department, King Fahd University of Petroleum and Minerals Dhahran 31261 Saudi Arabia
| | - Xuemei Sun
- Key Laboratory of Materials for Energy Conversion, Chinese Academy of Sciences, Department of Materials Science and Engineering, University of Science and Technology of China Hefei Anhui 230026 P. R. China
| | - Jin Xu
- Key Laboratory of Materials for Energy Conversion, Chinese Academy of Sciences, Department of Materials Science and Engineering, University of Science and Technology of China Hefei Anhui 230026 P. R. China
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30
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Du T, Adeleye AS, Keller AA, Wu Z, Han W, Wang Y, Zhang C, Li Y. Photochlorination-induced transformation of graphene oxide: Mechanism and environmental fate. WATER RESEARCH 2017; 124:372-380. [PMID: 28783493 DOI: 10.1016/j.watres.2017.07.054] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2017] [Revised: 07/11/2017] [Accepted: 07/21/2017] [Indexed: 06/07/2023]
Abstract
With the increasing production and wide utilization of graphene oxide (GO), the nanomaterials are expected to be released into the environment, and end up in surface waters, and/or wastewater treatment plants. This study explored the changes in the physicochemical properties of GO resulting from photochlorination- simulating the reactions that occur during water and wastewater treatment. Photochlorination resulted in significant changes in the surface oxygen-functionalities of the nanomaterials, and fragmenting of the graphenic carbon sheets was observed. We found that photochlorination can enhance the decomposition of GO through the formation of reduced GO. The changes in surface oxygen-functionalities of GO were attributed to the oxidation by chlorine of the nanomaterials' quinone groups, and further oxidation by and/or radicals. The surface charge of GO, measured by its zeta potential, increased in magnitude with chlorination but decreased in magnitude with photochlorination, leading to the decrease in the colloidal stability of the photochlorinated nanomaterials. The antibacterial effect of the nanomaterials increased with both chlorination and photochlorination. This study clearly shows how the physicochemical properties, and environmental fate and effect of GO are modified by photochlorination.
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Affiliation(s)
- Tingting Du
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tong Yan Road 38, Tianjin, 300350, China
| | - Adeyemi S Adeleye
- Bren School of Environmental Science and Management, University of California, Santa Barbara, CA, 93106, United States
| | - Arturo A Keller
- Bren School of Environmental Science and Management, University of California, Santa Barbara, CA, 93106, United States
| | - Zhineng Wu
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tong Yan Road 38, Tianjin, 300350, China
| | - Wei Han
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tong Yan Road 38, Tianjin, 300350, China
| | - Yingying Wang
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tong Yan Road 38, Tianjin, 300350, China
| | - Chengdong Zhang
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tong Yan Road 38, Tianjin, 300350, China
| | - Yao Li
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tong Yan Road 38, Tianjin, 300350, China.
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31
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Wang X, Wang Z, Zhang X, Peng H, Xin G, Lu C, Zhong Y, Wang G, Zhang Y. Nitrogen-Doped Defective Graphene Aerogel as Anode for all Graphene-Based Lithium Ion Capacitor. ChemistrySelect 2017. [DOI: 10.1002/slct.201701501] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xin Wang
- Research Institute for Energy Equipment Materials; Hebei University of Technology; Tianjin 300130 China
- School of Material Science & Engineering; Hebei University of Technology; Tianjin 300130 China
- Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology; Hebei University of Technology; Tianjin 300130 China
| | - Zhenkun Wang
- Research Institute for Energy Equipment Materials; Hebei University of Technology; Tianjin 300130 China
- School of Material Science & Engineering; Hebei University of Technology; Tianjin 300130 China
- Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology; Hebei University of Technology; Tianjin 300130 China
| | - Xin Zhang
- Research Institute for Energy Equipment Materials; Hebei University of Technology; Tianjin 300130 China
- School of Material Science & Engineering; Hebei University of Technology; Tianjin 300130 China
- Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology; Hebei University of Technology; Tianjin 300130 China
| | - Huifen Peng
- Research Institute for Energy Equipment Materials; Hebei University of Technology; Tianjin 300130 China
- School of Material Science & Engineering; Hebei University of Technology; Tianjin 300130 China
- Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology; Hebei University of Technology; Tianjin 300130 China
| | - Guoqing Xin
- Department of Mechanical, Aerospace, and Nuclear Engineering; Rensselaer Polytechnic Institute; Troy, New York 12180-3590 USA
| | - Chengxing Lu
- Research Institute for Energy Equipment Materials; Hebei University of Technology; Tianjin 300130 China
- School of Material Science & Engineering; Hebei University of Technology; Tianjin 300130 China
- Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology; Hebei University of Technology; Tianjin 300130 China
| | - Yuxiang Zhong
- Research Institute for Energy Equipment Materials; Hebei University of Technology; Tianjin 300130 China
- School of Material Science & Engineering; Hebei University of Technology; Tianjin 300130 China
- Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology; Hebei University of Technology; Tianjin 300130 China
| | - Gongkai Wang
- Research Institute for Energy Equipment Materials; Hebei University of Technology; Tianjin 300130 China
- School of Material Science & Engineering; Hebei University of Technology; Tianjin 300130 China
- Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology; Hebei University of Technology; Tianjin 300130 China
| | - Yongguang Zhang
- Research Institute for Energy Equipment Materials; Hebei University of Technology; Tianjin 300130 China
- School of Material Science & Engineering; Hebei University of Technology; Tianjin 300130 China
- Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology; Hebei University of Technology; Tianjin 300130 China
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32
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Wang N, He J, Tu Z, Yang Z, Zhao F, Li X, Huang C, Wang K, Jiu T, Yi Y, Li Y. Synthesis of Chlorine-Substituted Graphdiyne and Applications for Lithium-Ion Storage. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201704779] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ning Wang
- Qingdao Institute of Bioenergy and Bioprocess Technology; Chinese Academy of Sciences; No. 189 Songling Road 266101 Qingdao China
| | - Jianjiang He
- Qingdao Institute of Bioenergy and Bioprocess Technology; Chinese Academy of Sciences; No. 189 Songling Road 266101 Qingdao China
- University of Chinese Academy of Sciences; No. 19A Yuquan Road 100049 Beijing China
| | - Zeyi Tu
- University of Chinese Academy of Sciences; No. 19A Yuquan Road 100049 Beijing China
- Beijing National Laboratory for Molecular Sciences (BNLMS); CAS Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Ze Yang
- Qingdao Institute of Bioenergy and Bioprocess Technology; Chinese Academy of Sciences; No. 189 Songling Road 266101 Qingdao China
| | - Fuhua Zhao
- Qingdao Institute of Bioenergy and Bioprocess Technology; Chinese Academy of Sciences; No. 189 Songling Road 266101 Qingdao China
| | - Xiaodong Li
- Qingdao Institute of Bioenergy and Bioprocess Technology; Chinese Academy of Sciences; No. 189 Songling Road 266101 Qingdao China
- University of Chinese Academy of Sciences; No. 19A Yuquan Road 100049 Beijing China
| | - Changshui Huang
- Qingdao Institute of Bioenergy and Bioprocess Technology; Chinese Academy of Sciences; No. 189 Songling Road 266101 Qingdao China
| | - Kun Wang
- Qingdao Institute of Bioenergy and Bioprocess Technology; Chinese Academy of Sciences; No. 189 Songling Road 266101 Qingdao China
| | - Tonggang Jiu
- Qingdao Institute of Bioenergy and Bioprocess Technology; Chinese Academy of Sciences; No. 189 Songling Road 266101 Qingdao China
| | - Yuanping Yi
- Beijing National Laboratory for Molecular Sciences (BNLMS); CAS Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Yuliang Li
- Beijing National Laboratory for Molecular Sciences (BNLMS); CAS Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
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Wang N, He J, Tu Z, Yang Z, Zhao F, Li X, Huang C, Wang K, Jiu T, Yi Y, Li Y. Synthesis of Chlorine-Substituted Graphdiyne and Applications for Lithium-Ion Storage. Angew Chem Int Ed Engl 2017; 56:10740-10745. [DOI: 10.1002/anie.201704779] [Citation(s) in RCA: 172] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 06/16/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Ning Wang
- Qingdao Institute of Bioenergy and Bioprocess Technology; Chinese Academy of Sciences; No. 189 Songling Road 266101 Qingdao China
| | - Jianjiang He
- Qingdao Institute of Bioenergy and Bioprocess Technology; Chinese Academy of Sciences; No. 189 Songling Road 266101 Qingdao China
- University of Chinese Academy of Sciences; No. 19A Yuquan Road 100049 Beijing China
| | - Zeyi Tu
- University of Chinese Academy of Sciences; No. 19A Yuquan Road 100049 Beijing China
- Beijing National Laboratory for Molecular Sciences (BNLMS); CAS Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Ze Yang
- Qingdao Institute of Bioenergy and Bioprocess Technology; Chinese Academy of Sciences; No. 189 Songling Road 266101 Qingdao China
| | - Fuhua Zhao
- Qingdao Institute of Bioenergy and Bioprocess Technology; Chinese Academy of Sciences; No. 189 Songling Road 266101 Qingdao China
| | - Xiaodong Li
- Qingdao Institute of Bioenergy and Bioprocess Technology; Chinese Academy of Sciences; No. 189 Songling Road 266101 Qingdao China
- University of Chinese Academy of Sciences; No. 19A Yuquan Road 100049 Beijing China
| | - Changshui Huang
- Qingdao Institute of Bioenergy and Bioprocess Technology; Chinese Academy of Sciences; No. 189 Songling Road 266101 Qingdao China
| | - Kun Wang
- Qingdao Institute of Bioenergy and Bioprocess Technology; Chinese Academy of Sciences; No. 189 Songling Road 266101 Qingdao China
| | - Tonggang Jiu
- Qingdao Institute of Bioenergy and Bioprocess Technology; Chinese Academy of Sciences; No. 189 Songling Road 266101 Qingdao China
| | - Yuanping Yi
- Beijing National Laboratory for Molecular Sciences (BNLMS); CAS Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Yuliang Li
- Beijing National Laboratory for Molecular Sciences (BNLMS); CAS Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
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Zeraati AS, Arjmand M, Sundararaj U. Silver Nanowire/MnO 2 Nanowire Hybrid Polymer Nanocomposites: Materials with High Dielectric Permittivity and Low Dielectric Loss. ACS APPLIED MATERIALS & INTERFACES 2017; 9:14328-14336. [PMID: 28378996 DOI: 10.1021/acsami.6b14948] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
This study reports the fabrication of hybrid nanocomposites based on silver nanowire/manganese dioxide nanowire/poly(methyl methacrylate) (AgNW/MnO2NW/PMMA), using a solution casting technique, with outstanding dielectric permittivity and low dielectric loss. AgNW was synthesized using the hard-template technique, and MnO2NW was synthesized employing a hydrothermal method. The prepared AgNW:MnO2NW (2.0:1.0 vol %) hybrid nanocomposite showed a high dielectric permittivity (64 at 8.2 GHz) and low dielectric loss (0.31 at 8.2 GHz), which are among the best reported values in the literature in the X-band frequency range (8.2-12.4 GHz). The superior dielectric properties of the hybrid nanocomposites were attributed to (i) dimensionality match between the nanofillers, which increased their synergy, (ii) better dispersion state of AgNW in the presence of MnO2NW, (iii) positioning of ferroelectric MnO2NW in between AgNWs, which increased the dielectric permittivity of nanodielectrics, thereby increasing dielectric permittivity of the hybrid nanocomposites, (iv) barrier role of MnO2NW, i.e., cutting off the contact spots of AgNWs and leading to lower dielectric loss, and (v) AgNW aligned structure, which increased the effective surface area of AgNWs, as nanoelectrodes. Comparison of the dielectric properties of the developed hybrid nanocomposites with the literature highlights their great potential for flexible capacitors.
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Affiliation(s)
- Ali Shayesteh Zeraati
- Department of Chemical and Petroleum Engineering, University of Calgary , 2500 University Drive NW, Calgary, Canada T2N 1N4
| | - Mohammad Arjmand
- Department of Chemical and Petroleum Engineering, University of Calgary , 2500 University Drive NW, Calgary, Canada T2N 1N4
| | - Uttandaraman Sundararaj
- Department of Chemical and Petroleum Engineering, University of Calgary , 2500 University Drive NW, Calgary, Canada T2N 1N4
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35
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de Leon AC, Alonso L, Mangadlao JD, Advincula RC, Pentzer E. Simultaneous Reduction and Functionalization of Graphene Oxide via Ritter Reaction. ACS APPLIED MATERIALS & INTERFACES 2017; 9:14265-14272. [PMID: 28394562 DOI: 10.1021/acsami.7b01890] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Graphene oxide, the oxidized form of graphite, is a common precursor to conductive nanosheets and used widely in the preparation of composite materials. GO has the benefits of easy exfoliation and handling, but it tends to aggregate and restack when reduced. One approach to overcoming this undesired aggregation is covalent modification of the nanosheets; however, this typically requires additional reagents and time. Herein, we report the simultaneous reduction and functionalization of graphene oxide using the Ritter reaction such that reduced nanosheets show good conductivity without the aggregation typical of unmodified material. GO reacts with nitriles in strongly acidic conditions to give highly reduced graphene oxide (C:O of 4.38:1) with covalently attached amides, which compatibilizes it to a number of organic solvents. This Ritter-type reaction produces carbocations on the basal plane of graphene oxide, which allows nucleophilic attack by the nitrogen of the nitrile and produces amides upon hydrolysis. The product has sheet resistance (57.60 ± 4.04 kΩ/sq) substantially lower than that of the starting graphene oxide (529.60 ± 10.04 kΩ/sq) and, more importantly, can easily be dispersed in various organic solvents and does not restack into graphite-like materials upon drying. This method yields individual conductive nanosheets that can be readily incorporated into a number of different systems.
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Affiliation(s)
- Al C de Leon
- Department of Chemistry, Case Western Reserve University , Cleveland, Ohio 44106, United States
| | - Laura Alonso
- Department of Chemistry, Elmhurst College , Elmhurst, Illinois 60126, United States
| | - Joey Dacula Mangadlao
- Department of Radiology, Case Western Reserve University , Cleveland, Ohio 44106, United States
| | - Rigoberto C Advincula
- Department of Macromolecular Science and Engineering, Case Western Reserve University , Cleveland, Ohio 44106, United States
| | - Emily Pentzer
- Department of Chemistry, Case Western Reserve University , Cleveland, Ohio 44106, United States
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36
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Fan P, Wang L, Jia S, Chen F, Yang J, Zhong M. Encapsulated graphenes through ultrasonically initiated in situpolymerization: A route to high dielectric permittivity, low loss materials with low percolation threshold. J Appl Polym Sci 2017. [DOI: 10.1002/app.44628] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ping Fan
- College of Materials Science and Engineering, ZheJiang University of Technology, Hangzhou 310014, China
| | - Lei Wang
- College of Materials Science and Engineering, ZheJiang University of Technology, Hangzhou 310014, China
- Institute of Biomaterials and Engineering, Wenzhou Medical University, Wenzhou 325027, China
- Wenzhou Institute of Biomaterials and Engineering, Chinese Acad Sci, Wenzhou 325027, China
| | - Shunxin Jia
- College of Materials Science and Engineering, ZheJiang University of Technology, Hangzhou 310014, China
| | - Feng Chen
- College of Materials Science and Engineering, ZheJiang University of Technology, Hangzhou 310014, China
| | - Jintao Yang
- College of Materials Science and Engineering, ZheJiang University of Technology, Hangzhou 310014, China
| | - Mingqiang Zhong
- College of Materials Science and Engineering, ZheJiang University of Technology, Hangzhou 310014, China
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37
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Yoon HW, Bok C, Park NK, Jung HM, Kim YS, Kim BG, Suh DH, Won JC, Kim YH. Enhanced dielectric properties of polyimide/BaTiO3 nanocomposite by embedding the polypyrrole@polyimide core-shell nanoparticles. Macromol Res 2017. [DOI: 10.1007/s13233-017-5039-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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38
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Zhao X, Bai L, Bao RY, Liu ZY, Yang MB, Yang W. Excellent mechanical performance and enhanced dielectric properties of OBC/SiO2 elastomeric nanocomposites: effect of dispersion of the SiO2 nanoparticles. RSC Adv 2017. [DOI: 10.1039/c7ra08074c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A chain-like network structure and irregular dispersion of fillers are formed in OBC/SiO2 nanocomposites. Excellent mechanical performance and enhanced dielectric properties of OBC/SiO2 elastomeric nanocomposites are realized due to the peculiar chain-like network of the fillers.
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Affiliation(s)
- Xing Zhao
- College of Polymer Science and Engineering
- Sichuan University
- State Key Laboratory of Polymer Materials Engineering
- Chengdu
- China
| | - Lu Bai
- College of Polymer Science and Engineering
- Sichuan University
- State Key Laboratory of Polymer Materials Engineering
- Chengdu
- China
| | - Rui-Ying Bao
- College of Polymer Science and Engineering
- Sichuan University
- State Key Laboratory of Polymer Materials Engineering
- Chengdu
- China
| | - Zheng-Ying Liu
- College of Polymer Science and Engineering
- Sichuan University
- State Key Laboratory of Polymer Materials Engineering
- Chengdu
- China
| | - Ming-Bo Yang
- College of Polymer Science and Engineering
- Sichuan University
- State Key Laboratory of Polymer Materials Engineering
- Chengdu
- China
| | - Wei Yang
- College of Polymer Science and Engineering
- Sichuan University
- State Key Laboratory of Polymer Materials Engineering
- Chengdu
- China
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39
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Hierarchical Graphene coating for highly sensitive solid phase microextraction of organochlorine pesticides. Talanta 2016; 160:217-224. [DOI: 10.1016/j.talanta.2016.07.013] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 07/01/2016] [Accepted: 07/04/2016] [Indexed: 02/02/2023]
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Li Y, Yang N, Du T, Wang X, Chen W. Transformation of graphene oxide by chlorination and chloramination: Implications for environmental transport and fate. WATER RESEARCH 2016; 103:416-423. [PMID: 27494697 DOI: 10.1016/j.watres.2016.07.051] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 07/19/2016] [Accepted: 07/21/2016] [Indexed: 06/06/2023]
Abstract
The rapidly increasing and widespread use of graphene oxide (GO) calls for immediate attention on the environmental fate of this material. To date, very little is known about the environmental transformation of GO. This study explored the changes of physicochemical properties of GO from chlorination and chloramination, which simulated the reactions occurring in water and wastewater treatment systems. Significant changes of GO surface O-functionalities occurred and scrolling of graphene sheets (those of very large sizes) were observed upon the treatments. Chloroform, a byproduct from chlorination was also detected, indicating the ring-opening on the edge of GO nanosheets. The changes of GO surface O-functionalities were attributable to the oxidation of quinone groups of GO by chlorine or chloramine. The scrolling of large-sized GO sheets may be attributable to the destruction of benzene rings at the edge of the GO. The results of membrane filtration experiments and column transport experiments indicated that chlorination and chloramination enhanced the mobility and transport of GO, likely by increasing the colloidal stability and inhibiting the agglomeration of GO nanosheets. The findings of this study further underline the significant implications of GO transformation on the fate and transport of this new nanomaterial.
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Affiliation(s)
- Yao Li
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Wei Jin Road 94, Tianjin 300071, China.
| | - Nan Yang
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Wei Jin Road 94, Tianjin 300071, China
| | - Tingting Du
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Wei Jin Road 94, Tianjin 300071, China
| | - Xinzhe Wang
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Wei Jin Road 94, Tianjin 300071, China
| | - Wei Chen
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Wei Jin Road 94, Tianjin 300071, China
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41
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Du T, Wang Y, Yang X, Wang W, Guo H, Xiong X, Gao R, Wuli X, Adeleye AS, Li Y. Mechanisms and kinetics study on the trihalomethanes formation with carbon nanoparticle precursors. CHEMOSPHERE 2016; 154:391-397. [PMID: 27077535 DOI: 10.1016/j.chemosphere.2016.04.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Revised: 04/01/2016] [Accepted: 04/02/2016] [Indexed: 06/05/2023]
Abstract
With lots of carbon nanoparticles (CNPs) applied in the industry, the possibilities of their environmental release have received much attention. As the CNPs may enter drinking water systems, and persist in water and wastewater treatment systems, their possible reaction with disinfectants should be studied. In this study, the formation of trihalomethanes (THMs) with 5 types of carbon nanotubes (CNTs), graphene oxide (GO) and reduced graphene oxide (rGO) was investigated. All CNPs could act as precursors of THMs in aqueous phase. Total concentrations of THMs formed with CNPs varied from 0.24 to 0.95 μM, much lower than that formed from chlorinated Suwannee River Natural Organic Matter (SRNOM) (approximately 9 μM). The kinetics of THMs formation with GO was 0.0814 M(-1) s(-1), which is higher than most of the chlorinated humic acid obtained from different natural waters. The study indicates that during chlorination, C-Cl bond could be formed on the surface of CNPs. However, carbon atoms at the middle of two meta-positioned OH groups on the benzene ring are more active and may prefer to form THMs with chlorine oxidation. The influences of pH and reactant doses on the formation of THMs were also discussed.
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Affiliation(s)
- Tingting Du
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tongyan Road 38, Tianjin 300350, China
| | - Yingying Wang
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tongyan Road 38, Tianjin 300350, China
| | - Xin Yang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Wei Wang
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tongyan Road 38, Tianjin 300350, China
| | - Haonan Guo
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tongyan Road 38, Tianjin 300350, China
| | - Xinyu Xiong
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tongyan Road 38, Tianjin 300350, China
| | - Rui Gao
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tongyan Road 38, Tianjin 300350, China
| | - Xiati Wuli
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tongyan Road 38, Tianjin 300350, China
| | - Adeyemi S Adeleye
- Bren School of Environmental Science and Management, University of California, Santa Barbara, CA 93106, United States
| | - Yao Li
- College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Environmental Remediation and Pollution Control, Nankai University, Tongyan Road 38, Tianjin 300350, China; Bren School of Environmental Science and Management, University of California, Santa Barbara, CA 93106, United States.
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42
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Xing Z, Ju Z, Zhao Y, Wan J, Zhu Y, Qiang Y, Qian Y. One-pot hydrothermal synthesis of Nitrogen-doped graphene as high-performance anode materials for lithium ion batteries. Sci Rep 2016; 6:26146. [PMID: 27184859 PMCID: PMC4869103 DOI: 10.1038/srep26146] [Citation(s) in RCA: 128] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Accepted: 04/27/2016] [Indexed: 12/23/2022] Open
Abstract
Nitrogen-doped (N-doped) graphene has been prepared by a simple one-step hydrothermal approach using hexamethylenetetramine (HMTA) as single carbon and nitrogen source. In this hydrothermal process, HMTA pyrolyzes at high temperature and the N-doped graphene subsequently self-assembles on the surface of MgO particles (formed by the Mg powder reacting with H2O) during which graphene synthesis and nitrogen doping are simultaneously achieved. The as-synthesized graphene with incorporation of nitrogen groups possesses unique structure including thin layer thickness, high surface area, mesopores and vacancies. These structural features and their synergistic effects could not only improve ions and electrons transportation with nanometer-scale diffusion distances but also promote the penetration of electrolyte. The N-doped graphene exhibits high reversible capacity, superior rate capability as well as long-term cycling stability, which demonstrate that the N-doped graphene with great potential to be an efficient electrode material. The experimental results provide a new hydrothermal route to synthesize N-doped graphene with potential application for advanced energy storage, as well as useful information to design new graphene materials.
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Affiliation(s)
- Zheng Xing
- School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, P. R. China
| | - Zhicheng Ju
- School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, P. R. China
| | - Yulong Zhao
- School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, P. R. China
| | - Jialu Wan
- School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, P. R. China
| | - Yabo Zhu
- School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, P. R. China
| | - Yinghuai Qiang
- School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, P. R. China
| | - Yitai Qian
- Hefei National Laboratory for Physical Science at Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P.R. China
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43
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Highly Sensitive and Selective In-Situ SERS Detection of Pb(2+), Hg(2+), and Cd(2+) Using Nanoporous Membrane Functionalized with CNTs. Sci Rep 2016; 6:25307. [PMID: 27143512 PMCID: PMC4855155 DOI: 10.1038/srep25307] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 04/14/2016] [Indexed: 11/08/2022] Open
Abstract
Porous Anodic Alumina (PAA) membrane was functionalized with CoFe2O4 nanoparticles and used as a substrate for the growing of very long helical-structured Carbon Nanotubes (CNTs) with a diameter less than 20 nm. The structures and morphologies of the fabricated nanostructures were characterized by field emission- scanning electron microscopy (FE-SEM), energy dispersive X-ray (EDX), and Raman spectroscopy. By uploading the CNTs on PAA, the characteristic Raman peaks of CNTs and PAA showed 4 and 3 times enhancement, respectively, which leads to more sensitive Surface-Enhanced Raman Spectroscopy (SERS) substrates. For comparison, PAA and CNTs/PAA arrays were used as SERS substrates for the detection of Hg2+, Cd2+, and Pb2+. The proposed sensor demonstrated high sensitivity and selectivity between these heavy metal ions. CNTs/PAA sensor showed excellent selectivity toward Pb2+ over other metal ions, where the enhancement factor is decreased from ~17 for Pb2+ to ~12 for Hg2+ and to ~4 for Cd2+. Therefore, the proposed CNTs/PAA sensor can be used as a powerful tool for the determination of heavy metal ions in aqueous solutions.
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44
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Dang ZM, Zheng MS, Zha JW. 1D/2D Carbon Nanomaterial-Polymer Dielectric Composites with High Permittivity for Power Energy Storage Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:1688-701. [PMID: 26865507 DOI: 10.1002/smll.201503193] [Citation(s) in RCA: 119] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Revised: 11/16/2015] [Indexed: 05/17/2023]
Abstract
With the development of flexible electronic devices and large-scale energy storage technologies, functional polymer-matrix nanocomposites with high permittivity (high-k) are attracting more attention due to their ease of processing, flexibility, and low cost. The percolation effect is often used to explain the high-k characteristic of polymer composites when the conducting functional fillers are dispersed into polymers, which gives the polymer composite excellent flexibility due to the very low loading of fillers. Carbon nanotubes (CNTs) and graphene nanosheets (GNs), as one-dimensional (1D) and two-dimensional (2D) carbon nanomaterials respectively, have great potential for realizing flexible high-k dielectric nanocomposites. They are becoming more attractive for many fields, owing to their unique and excellent advantages. The progress in dielectric fields by using 1D/2D carbon nanomaterials as functional fillers in polymer composites is introduced, and the methods and mechanisms for improving dielectric properties, breakdown strength and energy storage density of their dielectric nanocomposites are examined. Achieving a uniform dispersion state of carbon nanomaterials and preventing the development of conductive networks in their polymer composites are the two main issues that still need to be solved in dielectric fields for power energy storage. Recent findings, current problems, and future perspectives are summarized.
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Affiliation(s)
- Zhi-Min Dang
- State Key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, Beijing, 100084, PR China
- Department of Polymer Science and Engineering, University of Science &Technology Beijing, Beijing, 100083, PR China
| | - Ming-Sheng Zheng
- Department of Polymer Science and Engineering, University of Science &Technology Beijing, Beijing, 100083, PR China
| | - Jun-Wei Zha
- Department of Polymer Science and Engineering, University of Science &Technology Beijing, Beijing, 100083, PR China
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45
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Rathod SG, Bhajantri RF, Ravindrachary V, Naik J, Kumar DJM. High mechanical and pressure sensitive dielectric properties of graphene oxide doped PVA nanocomposites. RSC Adv 2016. [DOI: 10.1039/c6ra16026c] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Tunable ac conductivity of 2 wt% GO doped PVA with applied pressures and TEM image of graphene oxide.
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Affiliation(s)
- Sunil G. Rathod
- Dept of Physics
- Mangalore University
- Mangalagangotri – 574199
- India
| | - R. F. Bhajantri
- Department of Physics
- Karnatak University
- Dharwad – 580003
- India
| | - V. Ravindrachary
- Dept of Physics
- Mangalore University
- Mangalagangotri – 574199
- India
| | - Jagadish Naik
- Dept of Physics
- Mangalore University
- Mangalagangotri – 574199
- India
| | - D. J. Madhu Kumar
- Department of Chemistry
- Mangalore University
- Mangalagangotri – 574199
- India
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46
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Liu L, Zhang Y, Lv F, Tong W, Ding L, Chu PK, Li P. Polyimide composites composed of covalently bonded BaTiO3@GO hybrids with high dielectric constant and low dielectric loss. RSC Adv 2016. [DOI: 10.1039/c6ra17259h] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Novel flexible three-phase high-k polyimide composites were fabricated by the incorporation of covalently bonded BaTiO3@GO hybrids in which the BaTiO3@GO hybrids were prepared by the reaction of amino modified BaTiO3 particles and GO.
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Affiliation(s)
- Leipeng Liu
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes
- National Laboratory of Mineral Materials
- School of Materials Science and Technology
- China University of Geosciences
- Beijing 100083
| | - Yihe Zhang
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes
- National Laboratory of Mineral Materials
- School of Materials Science and Technology
- China University of Geosciences
- Beijing 100083
| | - Fengzhu Lv
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes
- National Laboratory of Mineral Materials
- School of Materials Science and Technology
- China University of Geosciences
- Beijing 100083
| | - Wangshu Tong
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes
- National Laboratory of Mineral Materials
- School of Materials Science and Technology
- China University of Geosciences
- Beijing 100083
| | - Ling Ding
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes
- National Laboratory of Mineral Materials
- School of Materials Science and Technology
- China University of Geosciences
- Beijing 100083
| | - Paul K. Chu
- Department of Physics & Materials Science
- City University of Hong Kong
- Kowloon
- China
| | - Penggang Li
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes
- National Laboratory of Mineral Materials
- School of Materials Science and Technology
- China University of Geosciences
- Beijing 100083
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47
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Huang T, Zeng X, Yao Y, Sun R, Meng F, Xu J, Wong C. Boron nitride@graphene oxide hybrids for epoxy composites with enhanced thermal conductivity. RSC Adv 2016. [DOI: 10.1039/c5ra27315c] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Boron nitride/graphene oxide hybrids prepared by an electrostatic self-assembly strategy were used as fillers for epoxy composites with high thermal conductivity.
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Affiliation(s)
- Tao Huang
- Department of Materials Science and Key Lab of Automobile Materials of MOE
- Jilin University
- Changchun 130012
- China
- Shenzhen Institutes of Advanced Technology
| | - Xiaoliang Zeng
- Shenzhen Institutes of Advanced Technology
- Chinese Academy of Sciences
- Shenzhen 518055
- China
- Shenzhen College of Advanced Technology
| | - Yimin Yao
- Shenzhen Institutes of Advanced Technology
- Chinese Academy of Sciences
- Shenzhen 518055
- China
- Shenzhen College of Advanced Technology
| | - Rong Sun
- Shenzhen Institutes of Advanced Technology
- Chinese Academy of Sciences
- Shenzhen 518055
- China
| | - Fanling Meng
- Department of Materials Science and Key Lab of Automobile Materials of MOE
- Jilin University
- Changchun 130012
- China
| | - Jianbin Xu
- Department of Electronics Engineering
- The Chinese University of Hong Kong
- Hong Kong
- China
| | - Chingping Wong
- School of Materials Science and Engineering
- Georgia Institute of Technology
- Atlanta
- USA
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48
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Electrical Double Layer Capacitance in a Graphene-embedded Al2O3 Gate Dielectric. Sci Rep 2015; 5:16001. [PMID: 26530817 PMCID: PMC4632157 DOI: 10.1038/srep16001] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Accepted: 10/07/2015] [Indexed: 11/29/2022] Open
Abstract
Graphene heterostructures are of considerable interest as a new class of electronic devices with exceptional performance in a broad range of applications has been realized. Here, we propose a graphene-embedded Al2O3 gate dielectric with a relatively high dielectric constant of 15.5, which is about 2 times that of Al2O3, having a low leakage current with insertion of tri-layer graphene. In this system, the enhanced capacitance of the hybrid structure can be understood by the formation of a space charge layer at the graphene/Al2O3 interface. The electrical properties of the interface can be further explained by the electrical double layer (EDL) model dominated by the diffuse layer.
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49
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Zuo Z, Kim TY, Kholmanov I, Li H, Chou H, Li Y. Ultra-light Hierarchical Graphene Electrode for Binder-Free Supercapacitors and Lithium-Ion Battery Anodes. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:4922-30. [PMID: 26153327 DOI: 10.1002/smll.201501434] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Indexed: 05/25/2023]
Abstract
A mild and environmental-friendly method is developed for fabricating a 3D interconnected graphene electrode with large-scale continuity. Such material has interlayer pores between reduced graphene oxide nanosheets and in-plane pores. Hence, a specific surface area up to 835 m(2) g(-1) and a high powder conductivity up to 400 S m(-1) are achieved. For electrochemical applications, the interlayer pores can serve as "ion-buffering reservoirs" while in-plane ones act as "channels" for shortening the mass cross-plane diffusion length, reducing the ion response time, and prevent the interlayer restacking. As binder-free supercapacitor electrode, it delivers a specific capacitance up to 169 F g(-1) with surface-normalized capacitance close to 21 μF cm(-2) (intrinsic capacitance) and power density up to 7.5 kW kg(-1), in 6 m KOH aqueous electrolyte. In the case of lithium-ion battery anode, it shows remarkable advantages in terms of the initiate reversible Coulombic efficiency (61.3%), high specific capacity (932 mAh g(-1) at 100 mA g(-1)), and robust long-term retention (93.5% after 600 cycles at 2000 mAh g(-1)).
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Affiliation(s)
- Zicheng Zuo
- CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Science, Beijing, 100190, P. R. China
| | - Tae Young Kim
- Department of Mechanical Engineering and Materials Science and Engineering Program, The University of Texas at Austin, One University Station C2200, Austin, TX, 78712, USA
| | - Iskandar Kholmanov
- Department of Mechanical Engineering and Materials Science and Engineering Program, The University of Texas at Austin, One University Station C2200, Austin, TX, 78712, USA
| | - Huifeng Li
- Department of Mechanical Engineering and Materials Science and Engineering Program, The University of Texas at Austin, One University Station C2200, Austin, TX, 78712, USA
| | - Harry Chou
- Department of Mechanical Engineering and Materials Science and Engineering Program, The University of Texas at Austin, One University Station C2200, Austin, TX, 78712, USA
| | - Yuliang Li
- CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Science, Beijing, 100190, P. R. China
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50
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Yoon Y, Samanta K, Lee H, Lee K, Tiwari AP, Lee J, Yang J, Lee H. Highly Stretchable and Conductive Silver Nanoparticle Embedded Graphene Flake Electrode Prepared by In situ Dual Reduction Reaction. Sci Rep 2015; 5:14177. [PMID: 26383845 PMCID: PMC4585658 DOI: 10.1038/srep14177] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Accepted: 08/20/2015] [Indexed: 11/12/2022] Open
Abstract
The emergence of stretchable devices that combine with conductive properties offers new exciting opportunities for wearable applications. Here, a novel, convenient and inexpensive solution process was demonstrated to prepare in situ silver (Ag) or platinum (Pt) nanoparticles (NPs)-embedded rGO hybrid materials using formic acid duality in the presence of AgNO3 or H2PtCl6 at low temperature. The reduction duality of the formic acid can convert graphene oxide (GO) to rGO and simultaneously deposit the positively charged metal ion to metal NP on rGO while the formic acid itself is converted to a CO2 evolving gas that is eco-friendly. The AgNP-embedded rGO hybrid electrode on an elastomeric substrate exhibited superior stretchable properties including a maximum conductivity of 3012 S cm-1 (at 0 % strain) and 322.8 S cm-1 (at 35 % strain). Its fabrication process using a printing method is scalable. Surprisingly, the electrode can survive even in continuous stretching cycles.
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Affiliation(s)
- Yeoheung Yoon
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Sungkyunkwan University, Suwon 440-746. Korea.,Samsung-SKKU Graphene Center (SSGC), Sungkyunkwan University, 2066 Seoburo, Jangan-Gu, Suwon, Gyeonggi-Do 440-746, Republic of Korea
| | - Khokan Samanta
- Department of Chemistry, Department of Energy Science, SKKU Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University, Suwon 440-746. Korea
| | - Hanleem Lee
- Department of Chemistry, Department of Energy Science, SKKU Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University, Suwon 440-746. Korea
| | - Keunsik Lee
- Department of Chemistry, Department of Energy Science, SKKU Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University, Suwon 440-746. Korea
| | - Anand P Tiwari
- Department of Chemistry, Department of Energy Science, SKKU Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University, Suwon 440-746. Korea
| | - JiHun Lee
- Department of Chemistry, Department of Energy Science, SKKU Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University, Suwon 440-746. Korea
| | - Junghee Yang
- Department of Chemistry, Department of Energy Science, SKKU Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University, Suwon 440-746. Korea
| | - Hyoyoung Lee
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Sungkyunkwan University, Suwon 440-746. Korea.,Department of Chemistry, Department of Energy Science, SKKU Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University, Suwon 440-746. Korea.,Samsung-SKKU Graphene Center (SSGC), Sungkyunkwan University, 2066 Seoburo, Jangan-Gu, Suwon, Gyeonggi-Do 440-746, Republic of Korea
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