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Park S, Kim J, Choi JH, Kim JC, Kim J, Cho Y, Jung S, Kwak HW, Choi IG. Biodegradation behavior of acetylated lignin added polylactic acid under thermophilic composting conditions. Int J Biol Macromol 2023; 253:127472. [PMID: 37858649 DOI: 10.1016/j.ijbiomac.2023.127472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 10/11/2023] [Accepted: 10/14/2023] [Indexed: 10/21/2023]
Abstract
Acetylated lignin (AL) can improve compatibility with commercial plastic polymers compared to existing lignin and can be used as an effective additive for eco-friendly biocomposites. For this reason, AL can be effectively incorporated into polylactic acid (PLA)-based biocomposites, but its biodegradation properties have not been investigated. In this study, biodegradation experiments were performed under mesophilic and thermophilic conditions to determine the effect of AL addition on the biodegradation characteristics of PLA-based biocomposites. As a result, the PLA-based biocomposite showed a faster biodegradation rate in a thermophilic composting environment, which is higher than the glass transition temperature of PLA, compared to a mesophilic environment. 16S rDNA sequencing results showed that differences in microbial communities depending on mesophilic and thermophilic environments strongly affected the biodegradation rate of lignin/PLA biocomposites. Importantly, the addition of AL can effectively delay the thermophilic biodegradation of PLA biocomposites. As a result of tracking the changes in physicochemical properties according to the biodegradation period in a thermophilic composting environment, the main biodegradation mechanism of AL/PLA biocomposite hydrolysis. It proceeded with cleavage of the PLA molecular chain, preferential biodegradation of the amorphous region, and additional biodegradation of the crystalline region. Above all, adding AL can be proposed as an effective additive because it can minimize the decline in the mechanical properties of PLA and delay the biodegradation rate more effectively compared to existing kraft lignin (KL).
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Affiliation(s)
- Sangwoo Park
- Department of Agriculture, Forestry, and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Jungkyu Kim
- Department of Agriculture, Forestry, and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - June-Ho Choi
- Advanced Convergent Chemical Division, Center for Biobased Chemistry, Korea Research Institute of Chemical Technology, Ulsan 44429, Republic of Korea
| | - Jong-Chan Kim
- Department of Agriculture, Forestry, and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Jonghwa Kim
- Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Youngmin Cho
- Department of Agriculture, Forestry, and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Seungoh Jung
- Department of Agriculture, Forestry, and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea
| | - Hyo Won Kwak
- Department of Agriculture, Forestry, and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea; Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea.
| | - In-Gyu Choi
- Department of Agriculture, Forestry, and Bioresources, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea; Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea.
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Tsai WT, Kuo LA, Tsai CH, Huang HL, Yang RY, Tsai JH. Production of Porous Biochar from Cow Dung Using Microwave Process. MATERIALS (BASEL, SWITZERLAND) 2023; 16:7667. [PMID: 38138813 PMCID: PMC10744617 DOI: 10.3390/ma16247667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 12/11/2023] [Accepted: 12/12/2023] [Indexed: 12/24/2023]
Abstract
To valorize livestock manure, the present study investigated the production of biochar from cow dung (CD) by microwave pyrolysis. The pore properties and chemical characteristics of CD and CD-based biochar products were found to correlate with the process parameters like microwave power (300-1000 W) and residence time (5-20 min). The findings indicated that CD is an excellent biomass based on the richness of lignocellulosic constituents from the results of proximate analysis and thermogravimetric analysis (TGA). Higher calorific values were obtained at mild microwave conditions, giving the maximal enhancement factor 139% in comparison with the calorific value of CD (18.97 MJ/kg). Also, it can be concluded that the biochar product obtained at 800 W for a holding time of 5 min had the maximal BET surface area of 127 m2/g and total pore volume of 0.104 cm3/g, which were microporous and mesoporous in the nitrogen adsorption-desorption adsorption analysis. On the other hand, the CD-based biochar contained oxygen-containing functional groups and inorganic minerals based on the spectroscopic analyses by Fourier-transform infrared spectroscopy (FTIR) and energy-dispersive X-ray spectroscopy (EDS), thus featuring to be prone to hydrophilicity in aqueous solutions.
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Affiliation(s)
- Wen-Tien Tsai
- Graduate Institute of Bioresources, National Pingtung University of Science and Technology, Pingtung 912, Taiwan;
| | - Li-An Kuo
- Department of Environmental Science and Engineering, National Pingtung University of Science and Technology, Pingtung 912, Taiwan; (L.-A.K.); (J.-H.T.)
| | - Chi-Hung Tsai
- Department of Resources Engineering, National Cheng Kung University, Tainan 701, Taiwan;
| | - Hsiang-Lan Huang
- Graduate Institute of Bioresources, National Pingtung University of Science and Technology, Pingtung 912, Taiwan;
| | - Ru-Yuan Yang
- Department of Materials Engineering, National Pingtung University of Science and Technology, Pingtung 912, Taiwan;
| | - Jen-Hsiung Tsai
- Department of Environmental Science and Engineering, National Pingtung University of Science and Technology, Pingtung 912, Taiwan; (L.-A.K.); (J.-H.T.)
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3
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Tsai CH, Tsai WT, Kuo LA. Effect of Post-Washing on Textural Characteristics of Carbon Materials Derived from Pineapple Peel Biomass. MATERIALS (BASEL, SWITZERLAND) 2023; 16:7529. [PMID: 38138673 PMCID: PMC10744801 DOI: 10.3390/ma16247529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 11/29/2023] [Accepted: 12/04/2023] [Indexed: 12/24/2023]
Abstract
Porous carbon materials have been widely used to remove pollutants from the liquid-phase streams. However, their limited pore properties could be a major problem. In this work, the effects of post-washing methods (i.e., water washing and acid washing) on the textural characteristics of the resulting biochar and activated carbon products from pineapple peel biomass were investigated in the carbonization and CO2 activation processes. The experiments were set at an elevated temperature (i.e., 800 °C) holding for 30 min. It was found that the enhancement in pore property reached about a 50% increase rate, increasing from 569.56 m2/g for the crude activated carbon to the maximal BET surface area of 843.09 m2/g for the resulting activated carbon by water washing. The resulting activated carbon materials featured the microporous structures but also were characteristic of the mesoporous solids. By contrast, the enhancement in the increase rate by about 150% was found in the resulting biochar products. However, there seemed to be no significant variations in pore property with post-washing methods. Using the energy dispersive X-ray spectroscopy (EDS) and the Fourier Transform infrared spectroscopy (FTIR) analyses, it showed some oxygen-containing functional groups or complexes, potentially posing the hydrophilic characters on the surface of the resulting carbon materials.
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Affiliation(s)
- Chi-Hung Tsai
- Department of Resources Engineering, National Cheng Kung University, Tainan 701, Taiwan;
| | - Wen-Tien Tsai
- Graduate Institute of Bioresources, National Pingtung University of Science and Technology, Pingtung 912, Taiwan
| | - Li-An Kuo
- Department of Environmental Science and Engineering, National Pingtung University of Science and Technology, Pingtung 912, Taiwan;
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Tsai CH, Tsai WT. Optimization of Physical Activation Process by CO 2 for Activated Carbon Preparation from Honduras Mahogany Pod Husk. MATERIALS (BASEL, SWITZERLAND) 2023; 16:6558. [PMID: 37834694 PMCID: PMC10573756 DOI: 10.3390/ma16196558] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 09/30/2023] [Accepted: 10/02/2023] [Indexed: 10/15/2023]
Abstract
In this work, the Honduras Mahogany (Swietenia macropnylla King, SMK) seed husk was used as a novel biomass resource for producing activated carbon by physical activation. The texture characteristics and chemical characterization of resulting products were investigated in correlation with the process parameters. Based on the thermochemical properties of the SMK biomass, the process conditions were set to a rate of about 10 °C/min under nitrogen (N2) flow of 500 cm3/min heated to 500 °C, then switched to carbon dioxide (CO2) flow of 100 cm3/min in the specified activation conditions (i.e., temperature of 700-850 °C for holding times of 0-60 min). Our findings showed that the texture characteristics (i.e., surface area and pore volume) increased with an activation temperature increase from 700 to 800 °C for a holding time of 30 min but gradually decreased as the temperature increased thereafter. Similarly, the texture characteristics also indicated an increasing trend with the residence time extending from 0 min to 30 min but slightly decreased as the time was extended to 60 min. Therefore, the optimal activation conditions for producing SMK-based activated carbon should be set at 800 °C for a holding time of 30 min to obtain the maximal texture characteristics (i.e., BET surface area of 966 m2/g and total pore volume of 0.43 cm3/g). On the other hand, the chemical characteristics were analyzed by energy dispersive X-ray spectroscopy (EDS) and Fourier Transform infrared spectroscopy (FTIR), showing oxygen complexes contained on the hydrophilic surface of the resulting activated carbon.
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Affiliation(s)
- Chi-Hung Tsai
- Department of Resources Engineering, National Cheng Kung University, Tainan 701, Taiwan;
| | - Wen-Tien Tsai
- Graduate Institute of Bioresources, National Pingtung University of Science and Technology, Pingtung 912, Taiwan
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Thu MM, Chaiammart N, Jongprateep O, Techapiesancharoenkij R, Thant AA, Saito N, Panomsuwan G. Introducing micropores into carbon nanoparticles synthesized via a solution plasma process by thermal treatment and their charge storage properties in supercapacitors. RSC Adv 2023; 13:16136-16144. [PMID: 37305444 PMCID: PMC10248543 DOI: 10.1039/d3ra02314a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 05/15/2023] [Indexed: 06/13/2023] Open
Abstract
Carbon materials synthesized via a solution plasma process (SPP) have recently shown great potential for various applications. However, they mainly possess a meso-macroporous structure with a lack of micropores, which limits their applications for supercapacitors. Herein, carbon nanoparticles (CNPs) were synthesized from benzene via SPP and then subjected to thermal treatment at different temperatures (400, 600, 800, and 1000 °C) in an argon environment. The CNPs exhibited an amorphous phase and were more graphitized at high treatment temperatures. A small content of tungsten carbide particles was also observed, which were encapsulated in CNPs. An increase in treatment temperature led to an increase in the specific surface area of CNPs from 184 to 260 m2 g-1 through the development of micropores, while their meso-macropore structure remained unchanged. The oxygen content of CNPs decreased from 14.72 to 1.20 atom% as the treatment temperature increased due to the degradation of oxygen functionality. The charge storage properties of CNPs were evaluated for supercapacitor applications by electrochemical measurements using a three-electrode system in 1 M H2SO4 electrolyte. The CNPs treated at low temperatures exhibited an electric double layer and pseudocapacitive behavior due to the presence of quinone groups on the carbon surface. With increasing treatment temperature, the electric double layer behavior became more dominant, while pseudocapacitive behavior was suppressed due to the quinone degradation. Regarding cycling stability, the CNPs treated at high temperatures (with a lack of oxygen functionality) were more stable than those treated at low temperatures. This work highlights a way of introducing micropores into CNPs derived from SPP via thermal treatment, which could be helpful for controlling and adjusting their pore structure for supercapacitor applications.
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Affiliation(s)
- Myo Myo Thu
- Department of Materials Engineering, Faculty of Engineering, Kasetsart University Bangkok Thailand
- ICE-Matter Consortium, ASEAN University Network/Southeast Asia Engineering Education Development Network (AUN/SEED-Net), Kasetsart University Bangkok 10900 Thailand
| | - Nattapat Chaiammart
- Department of Materials Engineering, Faculty of Engineering, Kasetsart University Bangkok Thailand
| | - Oratai Jongprateep
- Department of Materials Engineering, Faculty of Engineering, Kasetsart University Bangkok Thailand
- ICE-Matter Consortium, ASEAN University Network/Southeast Asia Engineering Education Development Network (AUN/SEED-Net), Kasetsart University Bangkok 10900 Thailand
| | - Ratchatee Techapiesancharoenkij
- Department of Materials Engineering, Faculty of Engineering, Kasetsart University Bangkok Thailand
- ICE-Matter Consortium, ASEAN University Network/Southeast Asia Engineering Education Development Network (AUN/SEED-Net), Kasetsart University Bangkok 10900 Thailand
| | - Aye Aye Thant
- Department of Physics, Faculty of Science, University of Yangon Yangon 11041 Myanmar
| | - Nagahiro Saito
- Department of Chemical System Engineering, Graduate School of Engineering, Nagoya University Nagoya 464-8603 Japan
| | - Gasidit Panomsuwan
- Department of Materials Engineering, Faculty of Engineering, Kasetsart University Bangkok Thailand
- ICE-Matter Consortium, ASEAN University Network/Southeast Asia Engineering Education Development Network (AUN/SEED-Net), Kasetsart University Bangkok 10900 Thailand
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SO 3H-functionalized carbon fibers for the catalytic transformation of glycerol to glycerol tert-butyl ethers. Sci Rep 2023; 13:565. [PMID: 36631517 PMCID: PMC9834229 DOI: 10.1038/s41598-023-27432-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Accepted: 01/02/2023] [Indexed: 01/13/2023] Open
Abstract
Carbon fibers (CFs) of high quality were produced from hydrocarbons such as isobutane or ethylene using the catalytic chemical vapor deposition method (CCVD) and Ni catalyst. The as-prepared samples were functionalized with acidic groups using concentrated sulfuric acid or 4-benzenediazonium sulfonate (BDS) generated in situ from sulfanilic acid and sodium nitrite. The morphological features of the materials were confirmed by transmission electron microscopy, whereas their physicochemical properties were characterized by means of elemental and textural analyses, thermogravimetric (TG) method, Raman spectroscopy, potentiometric back titration, and X-ray diffraction analysis. The obtained CFs were used as catalysts in glycerol etherification with tert-butyl alcohol at 110 °C under autogenous pressure. The BDS-modified CFs were particularly effective in the reaction, showing high glycerol conversions (of about 45-55% after 6 h) and substantial yields of mono- and di-glycerol ethers. It was found that the chemistry of the sample surface was crucial for the process. The high concentration of -SO3H groups decorating CFs boosted the formation of di- and tri-tert-butyl glycerol ethers. Surface oxygen functionalities also had a positive effect on the reaction, however, their impact on the catalytic performances of CFs was significantly weaker compared to that shown by -SO3H groups and it was probably due to the adsorption of reagents on the catalyst surface.
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7
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Olufemi Oluwole A, Khoza P, Olatunji OS. Synthesis and characterization of g‐C
3
N
4
doped with activated carbon (AC) prepared from grape leaf litters for the photocatalytic degradation of enrofloxacin in aqueous systems. ChemistrySelect 2022. [DOI: 10.1002/slct.202203601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Affiliation(s)
- Adewumi Olufemi Oluwole
- School of Chemistry and Physics University of KwaZulu-Natal Westville Campus Durban 4000 South Africa
| | - Phindile Khoza
- School of Chemistry and Physics University of KwaZulu-Natal Westville Campus Durban 4000 South Africa
| | - Olatunde Stephen Olatunji
- School of Chemistry and Physics University of KwaZulu-Natal Westville Campus Durban 4000 South Africa
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Filimonenkov IS, Urvanov SA, Kazennov NV, Karaeva AR, Skryleva EA, Solomonik IG, Batova NI, Kurzhumbaev DZ, Tsirlina GA, Mordkovich VZ. Wet oxidative functionalization of carbon nanotube cloth to boost its performance as a flexible supercapacitor electrode. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.141501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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9
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Atchabarova A, Abdimomyn S, Abduakhytova D, Zhigalenok Y, Tokpayev R, Kishibayev K, Khavaza T, Kurbatov A, Zlobina Y, Djenizian T. Role of carbon material surface functional groups on their interactions with aqueous solutions. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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10
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Choi JH, Kim JH, Lee SY, Jang SK, Kwak HW, Kim H, Choi IG. Thermoplasticity reinforcement of ethanol organosolv lignin to improve compatibility in PLA-based ligno-bioplastics: Focusing on the structural characteristics of lignin. Int J Biol Macromol 2022; 209:1638-1647. [PMID: 35469955 DOI: 10.1016/j.ijbiomac.2022.04.090] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 04/04/2022] [Accepted: 04/12/2022] [Indexed: 11/05/2022]
Abstract
Commonly, lignin macromolecules have limitations in application to the thermoplastics industries due to poor dispersibility and interfacial compatibility within ligno-bioplastics. In this study, the dispersibility and interfacial compatibility of ethanol organosolv lignin (EOL) in PLA-based ligno-bioplastic were improved by enhancing the thermoplasticity via oxypropylation. Further, three types of EOLs extracted from different severity conditions were applied to investigate the effect of the structural characteristics of EOLs on the changes in the thermal properties. The thermal properties of oxypropylated EOL were dependent on the structural characteristics of the initial EOL as well as the degree of polymerization of propylene oxide. The thermoplasticity of EOLs extracted under mild condition was effectively increased as a new Tg and melting were observed. Based on increased thermoplasticity, the dispersibility and interfacial compatibility of EOL within PLA-based ligno-bioplastic were successfully improved, which compensates for the deterioration in mechanical strength of ligno-bioplastic due to the addition of unmodified EOL. Therefore, oxypropylation of EOL with suitable structural characteristics promises improved availability as a thermoplastic material.
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Affiliation(s)
- June-Ho Choi
- Advanced Convergent Chemical Division, Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology, Ulsan 44429, Republic of Korea
| | - Jong-Hwa Kim
- Department of Forest Sciences, Seoul National University, 1, Gwanak-ro, Seoul 08826, Republic of Korea
| | - Sang Youn Lee
- Department of Agriculture, Forestry, and Bioresources, Seoul National University, 1, Gwanak-ro, Seoul 08826, Republic of Korea
| | - Soo-Kyeong Jang
- Department of Wood Science, Faculty of Forestry, The University of British Columbia, 2424 Main Mall, Vancouver, BC V6T 1Z4, Canada
| | - Hyo Won Kwak
- Department of Agriculture, Forestry, and Bioresources, Seoul National University, 1, Gwanak-ro, Seoul 08826, Republic of Korea
| | - Hoyong Kim
- Advanced Convergent Chemical Division, Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology, Ulsan 44429, Republic of Korea
| | - In-Gyu Choi
- Department of Agriculture, Forestry, and Bioresources, Seoul National University, 1, Gwanak-ro, Seoul 08826, Republic of Korea; Research Institute of Agriculture and Life Sciences, Seoul National University, 1, Gwanak-ro, Seoul 08826, Republic of Korea.
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Alcañiz-Monge J, Román-Martínez MDC, Lillo-Ródenas MÁ. Chemical Activation of Lignocellulosic Precursors and Residues: What Else to Consider? Molecules 2022; 27:1630. [PMID: 35268734 PMCID: PMC8911564 DOI: 10.3390/molecules27051630] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 02/20/2022] [Accepted: 02/22/2022] [Indexed: 11/17/2022] Open
Abstract
This paper provides the basis for understanding the preparation and properties of an old, but advanced material: activated carbon. The activated carbons discussed herein are obtained from "green" precursors: biomass residues. Accordingly, the present study starts analyzing the components of biomass residues, such as cellulose, hemicellulose, and lignin, and the features that make them suitable raw materials for preparing activated carbons. The physicochemical transformations of these components during their heat treatment that lead to the development of a carbonized material, a biochar, are also considered. The influence of the chemical activation experimental conditions on the yield and porosity development of the final activated carbons are revised as well, and compared with those for physical activation, highlighting the physicochemical interactions between the activating agents and the lignocellulosic components. This review incorporates a comprehensive discussion about the surface chemistry that can be developed as a result of chemical activation and compiles some results related to the mechanical properties and conformation of activated carbons, scarcely analyzed in most published papers. Finally, economic, and environmental issues involved in the large-scale preparation of activated carbons by chemical activation of lignocellulosic precursors are commented on as well.
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Affiliation(s)
| | | | - María Ángeles Lillo-Ródenas
- MCMA Group, Department of Inorganic Chemistry and Materials Institute (IUMA), Faculty of Sciences, University of Alicante, Ap. 99, E-03080 Alicante, Spain; (J.A.-M.); (M.d.C.R.-M.)
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Chakraborty S, Simon R, Vadakkekara A, N.L. M. Microwave assisted synthesis of poly(ortho-phenylenediamine-co-aniline) and functionalised carbon nanotube nanocomposites for fabric-based supercapacitors. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2021.139678] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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13
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Characterization of Novel Solid Dispersions of Moringa oleifera Leaf Powder Using Thermo-Analytical Techniques. Processes (Basel) 2021. [DOI: 10.3390/pr9122230] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Moringa oleifera leaf powder (MOLP) has been identified as the most important functional ingredient owing to its rich nutritional profile and healthy effects. The solubility and functional properties of this ingredient can be enhanced through solid dispersion technology. This study aimed to investigate the effects of polyethylene glycols (PEGs) 4000 and 6000 as hydrophilic carriers and solid dispersion techniques (freeze-drying, melting, solvent evaporation, and microwave irradiation) on the crystallinity and thermal stability of solid-dispersed Moringa oleifera leaf powders (SDMOLPs). SDMOLPs were dully characterized using powder X-ray diffraction (PXRD), differential scanning calorimetry (DSC), thermo-gravimetric analysis (TGA), and Fourier transform infrared spectroscopy (FTIR). The PXRD results revealed that the solid dispersions were partially amorphous with strong diffraction peaks at 2θ values of 19° and 23°. The calorimetric and thermogravimetric curves showed that PEGs conferred greater stability on the dispersions. The FTIR studyrevealed the existence of strong intermolecular hydrogen bond interactions between MOLP and PEG functional groups. MOLP solid dispersions may be useful in functional foods and beverages and nutraceutical formulations.
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Geczo A, Giannakoudakis DA, Triantafyllidis K, Elshaer MR, Rodríguez-Aguado E, Bashkova S. Mechanistic insights into acetaminophen removal on cashew nut shell biomass-derived activated carbons. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:58969-58982. [PMID: 31925698 DOI: 10.1007/s11356-019-07562-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Accepted: 12/29/2019] [Indexed: 05/20/2023]
Abstract
Activated carbons prepared from cashew nut shells by chemical activation with phosphoric acid were tested for the removal of acetaminophen. It was found that an increase in carbonization temperature resulted in increased pore volume and decreased amount of surface functional groups. Potentiometric titration analysis indicated that the majority of surface groups on carbons are acidic. Detailed surface characterization by FT-IR, XPS, and thermal analyses indicated the involvement of surface functional groups in the removal of acetaminophen either via hydrogen bonding or by acid hydrolysis. The carbon obtained at 600 °C, which contains high amount of carboxylic groups and high pore volume, exhibited the highest adsorption capacity. For this carbon, the removal of acetaminophen took place mostly via acid hydrolysis with the formation of p-aminophenol and acetic acid adsorbed on the surface. Carbon obtained at 400 °C was found to have the highest density of acidic functional groups, which resulted in dimerization reactions and pore blockage. No direct correlation was observed between the adsorption capacities of carbons and their textural or surface characteristics. This suggests the complexity of acetaminophen removal by the cashew nut shell-derived activated carbons, governed by their surface chemistry and supported by high surface area accessible via micro/mesopores.
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Affiliation(s)
- Alexandra Geczo
- Department of Chemistry and Biochemistry, Fairleigh Dickinson University, Madison, NJ, 07940, USA
| | | | | | - Mohammed Ragab Elshaer
- Department of Chemistry and Biochemistry, Fairleigh Dickinson University, Madison, NJ, 07940, USA
| | - Elena Rodríguez-Aguado
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos, 29071, Málaga, Spain
| | - Svetlana Bashkova
- Department of Chemistry and Biochemistry, Fairleigh Dickinson University, Madison, NJ, 07940, USA.
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15
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Yoon JC, Dai X, Kang KN, Hwang J, Kwak MJ, Ding F, Jang JH. Graphitization with Suppressed Carbon Loss for High-Quality Reduced Graphene Oxide. ACS NANO 2021; 15:11655-11666. [PMID: 34196523 DOI: 10.1021/acsnano.1c02178] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
An efficient reduction method to obtain high-quality graphene sheets from mass-producible graphene oxide is highly desirable for practical applications. Here, we report an in situ deoxidation and graphitization mechanism for graphene oxide that allows for high-quality reduced graphene oxide sheets under the low temperature condition (<300 °C) by utilizing a well-known Fischer-Tropsch reaction catalyst (CuFeO2). By applying modified FTR conditions, where graphene oxide was reduced on the catalyst surface under the hydrogen-poor condition, deoxidation with much suppressed carbon loss was possible, resulting in high-quality graphene sheets. Our experimental data and density functional theory calculations proved that reduction which occurred on the CuFeO2 surface preferentially removed adsorbed oxygen atoms in graphene oxide sheets, leaving dissociated carbon structures to be restored to a near-perfect few-layer graphene sheet. TGA-mass data revealed that GO with catalysts released 92.8% less carbon-containing gases than GO without catalysts during the reduction process, which suggests that this process suppressed carbon loss in graphene oxide sheets, leading to near-perfect graphene. The amount of oxygen related to the epoxide group in the basal plane of GO significantly decreased to near zero (from 43.84 to 0.48 at. %) in catalyst-assisted reduced graphene oxide (CA-rGO). The average domain size and the density of defects of CA-rGO were 4 times larger and 0.1 times lower than those for thermally reduced graphene oxide (TrGO), respectively. As a result, CA-rGO had a 246 and 8 times lower electrical resistance than TrGO and CVD-graphene. With these performances, CA-rGO coated paper connected to a coin-cell battery successfully lit an LED bulb, and CA-rGO itself acted as an efficient catalyst for both the hydrogen evolution reaction and the oxygen evolution reaction.
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Affiliation(s)
- Jong-Chul Yoon
- School of Energy and Chemical Engineering, Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Xinyue Dai
- Center for Multidimensional Carbon Materials, Institute for Basic Science, Ulsan 44919, Republic of Korea
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Kyeong-Nam Kang
- School of Energy and Chemical Engineering, Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Jongha Hwang
- School of Energy and Chemical Engineering, Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Myung-Jun Kwak
- School of Energy and Chemical Engineering, Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Feng Ding
- Center for Multidimensional Carbon Materials, Institute for Basic Science, Ulsan 44919, Republic of Korea
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Ji-Hyun Jang
- School of Energy and Chemical Engineering, Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
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16
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Choi JH, Cho SM, Kim JC, Park SW, Cho YM, Koo B, Kwak HW, Choi IG. Thermal Properties of Ethanol Organosolv Lignin Depending on Its Structure. ACS OMEGA 2021; 6:1534-1546. [PMID: 33490813 PMCID: PMC7818625 DOI: 10.1021/acsomega.0c05234] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Accepted: 12/29/2020] [Indexed: 06/12/2023]
Abstract
In general, lignin exhibits unpredictable and nonuniform thermal properties due to the structural variations caused by the extraction processes. Therefore, a systematic understanding of the correlation between the extraction conditions, structural characteristics, and properties is indispensable for the commercial utilization of lignin. In this study, the effect of extraction conditions on the structural characteristics of ethanol organosolv lignin (EOL) was investigated by response surface methodology. The structural characteristics of EOL (molecular weight, hydroxyl content, and intramolecular coupling structure) were significantly affected by the extraction conditions (temperature, sulfuric acid concentration, and ethanol concentration). In addition, the correlation between the structural characteristics and thermal properties of the extracted EOLs was estimated. The relevant correlations between the structural characteristics and thermal properties were determined. In particular, EOLs that had a low molecular weight, high phenolic hydroxyl content, and low aryl-ether linkage content exhibited prominent thermal properties in terms of their initial decomposition rate and a high glass transition temperature, T g. Correspondingly, EOL-PLA blends prepared using three EOL types exhibited improved thermal properties (starting point of thermal decomposition and maximum decomposition temperature) compared to neat PLA and had thermal decomposition behaviors coincident with the thermal properties of the constituent EOLs.
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Affiliation(s)
- June-Ho Choi
- Department
of Forest Sciences, Seoul National University, 1, Gwanak-ro, Seoul 08826, Republic
of Korea
| | - Seong-Min Cho
- Department
of Forest Sciences, Seoul National University, 1, Gwanak-ro, Seoul 08826, Republic
of Korea
| | - Jong-Chan Kim
- Department
of Agriculture, Forestry, and Bioresources, Seoul National University, 1, Gwanak-ro, Seoul 08826, Republic of Korea
| | - Sang-Woo Park
- Department
of Agriculture, Forestry, and Bioresources, Seoul National University, 1, Gwanak-ro, Seoul 08826, Republic of Korea
| | - Young-Min Cho
- Department
of Agriculture, Forestry, and Bioresources, Seoul National University, 1, Gwanak-ro, Seoul 08826, Republic of Korea
| | - Bonwook Koo
- Green
and Sustainable Materials R&D Department, Korea Institute of Industrial Technology (KITECH), 89, Yangdaegiro-gil, Cheonan 31056, Republic of Korea
| | - Hyo Won Kwak
- Department
of Agriculture, Forestry, and Bioresources, Seoul National University, 1, Gwanak-ro, Seoul 08826, Republic of Korea
| | - In-Gyu Choi
- Department
of Agriculture, Forestry, and Bioresources, Seoul National University, 1, Gwanak-ro, Seoul 08826, Republic of Korea
- Research
Institute of Agriculture and Life Sciences, Seoul National University, 1, Gwanak-ro, Seoul 08826, Republic of Korea
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17
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Synthesis, Characterization and Properties of Biodegradable Poly(Butylene Sebacate- Co-terephthalate). Polymers (Basel) 2020; 12:polym12102389. [PMID: 33081379 PMCID: PMC7602960 DOI: 10.3390/polym12102389] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 10/10/2020] [Accepted: 10/12/2020] [Indexed: 01/19/2023] Open
Abstract
In this study, poly(butylene sebacate-co-terephthalate) (PBSeT) was successfully synthesized using various ratios of sebacic acid (Se) and dimethyl terephthalate (DMT). The synthesized PBSeT showed a high molecular weight (Mw, 88,700–154,900 g/mol) and good elastomeric properties. In particular, the PBSeT64 (6:4 sebacic acid/dimethyl terephthalate mole ratio) sample showed an elongation at break value of over 1600%. However, further increasing the DMT content decreased the elongation properties but increased the tensile strength due to the inherent strength of the aromatic unit. The melting point and crystallization temperature were difficult to observe in PBSeT64, indicating that an amorphous copolyester was formed at this mole ratio. Interestingly, wide angle X-ray diffraction (WAXD) curves was shown in the cases of PBSeT46 and PBSeT64, neither the crystal peaks of PBSe nor those of poly(butylene terephthalate) (PBT) are observed, that is, PBSeT64 showed an amorphous form with low crystallinity. The Fourier-transform infrared (FT-IR) spectrum showed C–H peaks at around 2900 cm−1 that reduced as the DMT ratio was increased. Nuclear magnetic resonance (NMR) showed well-resolved peaks split by coupling with the sebacate and DMT moieties. These results highlight that elastomeric PBSeT with high molecular weight could be synthesized by applying DMT monomer and showed promising mechanical properties.
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18
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Salman A, Padmajan Sasikala S, Kim IH, Kim JT, Lee GS, Kim JG, Kim SO. Tungsten nitride-coated graphene fibers for high-performance wearable supercapacitors. NANOSCALE 2020; 12:20239-20249. [PMID: 33026025 DOI: 10.1039/d0nr06636b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Graphene-fiber (GF) supercapacitors have attracted significant research attention in the field of wearable devices. However, there is still a need for active materials with high energy density. Transition Metal Nitrides (TMNs) are promising candidates for this purpose compared with conventional Transition Metal Oxides (TMOs) or conducting polymers (CPs) owing to their higher electrical conductivity, stability and relevant electrochemical properties. We have successfully integrated Tungsten Nitride (WN) with reduced graphene oxide fibers (rGOF) and developed high-performance hybrid fiber (WN-rGOF) supercapacitors. These hybrid supercapacitors attained a high capacitance of 16.29 F cm-3 at 0.05 A cm-3 and an energy density of 1.448 mW h cm-3, which is 7.5 and 1.75 times higher than those of the pure rGOF supercapacitor and the Tungsten Oxide/rGO hybrid fiber (WO3-rGOF) supercapacitor, respectively. The energy density readily increased up to 2.896 mW h cm-3 when three WN-rGOF supercapacitors were connected in series. The WN-rGOF supercapacitor also showed high capacitance retention of 84.7% after 10 000 cycles along with appreciable performance under severe mechanical deformation.
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Affiliation(s)
- Ali Salman
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science and Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.
| | - Suchithra Padmajan Sasikala
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science and Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.
| | - In Ho Kim
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science and Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.
| | - Jun Tae Kim
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science and Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.
| | - Gang San Lee
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science and Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.
| | - Jin Goo Kim
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science and Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.
| | - Sang Ouk Kim
- National Creative Research Initiative Center for Multi-Dimensional Directed Nanoscale Assembly, Department of Materials Science and Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.
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19
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Choi GB, Hong S, Wee JH, Kim DW, Seo TH, Nomura K, Nishihara H, Kim YA. Quantifying Carbon Edge Sites on Depressing Hydrogen Evolution Reaction Activity. NANO LETTERS 2020; 20:5885-5892. [PMID: 32584587 DOI: 10.1021/acs.nanolett.0c01842] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
To understand the effect of microstructural characteristics of carbon materials on their electrochemical or electrocatalytic performance, an in-depth study of the edges in carbon materials should be carried out. In this study, catalytically grown platelet-type carbon nanofibers (CNFs) with fully exposed edges were physically and chemically passivated to clarify the relationship between the edge density and the hydrogen evolution reaction (HER) activity. Due to the aligned structure along the fiber axis, the edges on the outer surface of the CNFs were easily modified without using a complex process. The edges on the surface of the CNFs were inactivated by sequentially forming single, double, and multiple loops as the heat treatment temperatures increased. The number of edges within the CNFs was quantitatively measured using temperature-programmed desorption (TPD) up to 1800 °C. The surviving edges on the surface of thermally treated CNFs were identified by chemical functionalization via an amination reaction. We identified a close relationship between the HER activity and the edge density. When evaluating the electrochemical and electrocatalytic activity of carbon materials, it is important to know the portion of the edge surface area with respect to the total surface area and edge ratio.
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Affiliation(s)
- Go Bong Choi
- Department of Polymer Engineering, Graduate School, School of Polymer Science and Engineering & Alan G. MacDiarmid Energy Research Institute, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
| | - Seungki Hong
- Department of Polymer Engineering, Graduate School, School of Polymer Science and Engineering & Alan G. MacDiarmid Energy Research Institute, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
| | - Jae-Hyung Wee
- Department of Polymer Engineering, Graduate School, School of Polymer Science and Engineering & Alan G. MacDiarmid Energy Research Institute, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
| | - Doo-Won Kim
- Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Jeonbuk 55324, Republic of Korea
| | - Tae Hoon Seo
- Smart Energy & Nano Photonic R&D Group, Korea Institute of Industrial Technology, Gwangju 61012, Republic of Korea
| | - Keita Nomura
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8677, Japan
| | - Hirotomo Nishihara
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8677, Japan
- Advanced Institute for Materials Research, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai 980-8577, Japan
| | - Yoong Ahm Kim
- Department of Polymer Engineering, Graduate School, School of Polymer Science and Engineering & Alan G. MacDiarmid Energy Research Institute, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
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20
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Le HTT, Ngo DT, Dang VAD, Hoang TTB, Park CJ. Decoration of mesoporous carbon electrodes with tin oxide to boost their supercapacitive performance. NEW J CHEM 2020. [DOI: 10.1039/d0nj02585b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A unique material comprising mesoporous carbon decorated with tin oxide was synthesised by facile incipient wetness impregnation for enhanced charge storage.
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Affiliation(s)
- Hang T. T. Le
- School of Chemical Engineering
- Hanoi University of Science and Technology
- Hai Ba Trung
- Vietnam
| | - Duc Tung Ngo
- Research and Development Centre
- Hyundai Aluminum Vina Shareholding Company
- Van Lam
- Vietnam
| | - Viet-Anh-Dung Dang
- School of Chemical Engineering
- Hanoi University of Science and Technology
- Hai Ba Trung
- Vietnam
| | - Thuy T. B. Hoang
- School of Chemical Engineering
- Hanoi University of Science and Technology
- Hai Ba Trung
- Vietnam
| | - Chan-Jin Park
- Department of Materials Science and Engineering
- Chonnam National University
- Gwangju 500-757
- South Korea
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21
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Palaganas JO, Palaganas NB, Ramos LJI, David CPC. 3D Printing of Covalent Functionalized Graphene Oxide Nanocomposite via Stereolithography. ACS APPLIED MATERIALS & INTERFACES 2019; 11:46034-46043. [PMID: 31713406 DOI: 10.1021/acsami.9b12071] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A major challenge for many industries wanting to adopt 3D printing technologies for rapid prototyping, customized parts, and low-volume manufacturing depends on the availability and functionality of the input materials to suit specific requirements. A well-studied nanofiller because of its distinct properties and wide range of applications, graphene oxide (GO) proves to be a good choice in the development of new materials. However, as a filler in a polymer matrix, GO has its own unique set of problems enough to make certain constraints in achieving an optimum reinforcement in the targeted polymer matrix. The need for a matrix-filler interaction is critical because reinforcement occurs only when the external load applied to the material can be successfully transmitted from the matrix to the filler, which will only happen if the interfacial adhesion between the matrix and the filler is strong. This study demonstrates the synthesis of the covalently linked GO-methacrylate (MA) nanocomposite materials through 3D printing via stereolithography (SL). Spectral analysis using Fourier-transform infrared confirms the successful functionalization of GO and ascertains the presence of the functionalized GO (fGO) in the 3D-printed nanocomposite specimens. Likewise, further validation using thermogravimetric analysis and differential scanning calorimetry also affirms the formation of fGO for use as a functional filler, activating a stronger interfacial bonding with the MA polymer. Excellent attributes of GO will become futile because of premature fracturing of the material simply because of an oversight to consider robustness during the early stages of design. Hence, different mechanical and thermal properties of the new 3D-printed MA-fGO nanocomposite material are characterized and presented in the discussion. This work demonstrates the first successful 3D printing of the functionalized GO nanocomposite via SL, forming a complex structure with consistently high fidelity and enhanced material properties with potential for various industrial applications.
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Affiliation(s)
- Jerome O Palaganas
- School of Graduate Studies , Mapua University , Intramuros , Manila 1002 , Philippines
| | - Napolabel B Palaganas
- School of Graduate Studies , Mapua University , Intramuros , Manila 1002 , Philippines
| | - Liam Jose I Ramos
- International School Manila , Bonifacio Global City, Taguig City , Metro Manila 1634 , Philippines
| | - Carlos Primo C David
- National Institute of Geological Sciences , University of the Philippines, Diliman , Quezon City , Metro Manila 1101 , Philippines
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22
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Zhang X, Zhang C, Li D, Cao S, Yin M, Wang P, Ding G, Yang L, Cheng J, Lu L. High Weight-Specific Power Density of Thin-Film Amorphous Silicon Solar Cells on Graphene Papers. NANOSCALE RESEARCH LETTERS 2019; 14:324. [PMID: 31620971 PMCID: PMC6795669 DOI: 10.1186/s11671-019-3132-6] [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: 05/17/2019] [Accepted: 08/19/2019] [Indexed: 06/10/2023]
Abstract
Flexible thin-film solar cells with high weight-specific power density are highly desired in the emerging portable/wearable electronic devices, solar-powered vehicles, etc. The conventional flexible metallic or plastic substrates are encountered either overweight or thermal and mechanical mismatch with deposited films. In this work, we proposed a novel substrate for flexible solar cells based on graphene paper, which possesses the advantages of being lightweight and having a high-temperature tolerance and high mechanical flexibility. Thin-film amorphous silicon (a-Si:H) solar cells were constructed on such graphene paper, whose power density is 4.5 times higher than that on plastic polyimide substrates. In addition, the a-Si:H solar cells present notable flexibility whose power conversion efficiencies show little degradation when the solar cells are bent to a radius as small as 14 mm for more than 100 times. The application of this unique flexible substrate can be extended to CuInGaSe and CdTe solar cells and other thin-film devices requiring high-temperature processing.
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Affiliation(s)
- Xin Zhang
- School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, People's Republic of China
- CAS Key Lab of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, People's Republic of China
| | - Chi Zhang
- CAS Key Lab of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, People's Republic of China
| | - Dongdong Li
- CAS Key Lab of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, People's Republic of China
| | - Shuangying Cao
- CAS Key Lab of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, People's Republic of China
| | - Min Yin
- CAS Key Lab of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, People's Republic of China
| | - Peng Wang
- School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, People's Republic of China
- CAS Key Lab of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, People's Republic of China
| | - Guqiao Ding
- Center for Excellence in Superconducting Electronics (CENSE), State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences, Shanghai, 200050, People's Republic of China
| | - Liyou Yang
- CAS Key Lab of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, People's Republic of China
| | - Jinrong Cheng
- School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, People's Republic of China.
| | - Linfeng Lu
- CAS Key Lab of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, People's Republic of China.
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23
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High-performance microporous polymer membranes prepared by interfacial polymerization for gas separation. J Memb Sci 2019. [DOI: 10.1016/j.memsci.2018.12.029] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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24
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Izadi M, Mohammadi I, Shahrabi T, Ramezanzadeh B, Fateh A. Corrosion inhibition performance of novel eco-friendly nanoreservoirs as bi-component active system on mild steel in aqueous chloride solution. J Taiwan Inst Chem Eng 2019. [DOI: 10.1016/j.jtice.2018.09.012] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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25
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Zaman AC. Polyol derived sulfonated solvothermal carbon for efficient dye removal from aqueous solutions. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2017.11.117] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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26
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Abstract
Activated carbon (AC) was prepared from carbonization of phosphoric acid soaked peanut shell at 380°C under inert atmosphere followed by activation with hydrogen peroxide. The AC was characterized by SEM, EDX, FTIR, TGA, and BET surface area and pore size analyzer. The potential of AC as a catalyst for solvent-free oxidation of cyclohexane to cyclohexanol and cyclohexanone (the mixture is known as KA oil) in the presence of molecular oxygen at moderate temperature was investigated in a self-designed double-walled three-necked batch reactor. The effect of different reaction parameters/additive was optimized. The maximum productivity value (2.14 mmolg−1 h−1, without base, and 4.85 mmolg−1 h−1, with 0.2 mmol NaOH) of the desired product was achieved under optimal reaction parameters: vol 12.5 mL, cat 0.4 g, time 14 h, oxygen flow 40 mL/min (pO2 760 Torr), stirring 1100 rpm, and temp 75°C. The AC shows recyclability for multiple runs without any significant loss in activity. Thus, the AC can be an efficient catalyst, due to low cost, ease of synthesis, easy recovery, nonleaching, and recyclability for multiple uses for the solvent-free oxidation of cyclohexane.
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27
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He Q, Huang S, Wan K, Xu H, Miao Z. A comparison of desorption process of Chinese and Australian lignites by dynamic vapour sorption. SEP SCI TECHNOL 2016. [DOI: 10.1080/01496395.2016.1158192] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Qiongqiong He
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Jiangsu, China
- National Engineering Research Center of Coal Preparation & Purification, China University of Mining and Technology, Xuzhou, Jiangsu, China
| | - Shaomeng Huang
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Jiangsu, China
- National Engineering Research Center of Coal Preparation & Purification, China University of Mining and Technology, Xuzhou, Jiangsu, China
| | - Keji Wan
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Jiangsu, China
- National Engineering Research Center of Coal Preparation & Purification, China University of Mining and Technology, Xuzhou, Jiangsu, China
| | - Hongxiang Xu
- School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing, China
| | - Zhenyong Miao
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Jiangsu, China
- National Engineering Research Center of Coal Preparation & Purification, China University of Mining and Technology, Xuzhou, Jiangsu, China
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28
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Zhang L, Cui L, Wang Z, Dong Y. Modification of Activated Carbon Using Microwave Radiation and Its Effects on the Adsorption of SO 2. JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 2016. [DOI: 10.1252/jcej.14we081] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Liqiang Zhang
- National Engineering Laboratory for Coal-fired Pollutants Emission Reduction, Shandong University
| | - Lin Cui
- National Engineering Laboratory for Coal-fired Pollutants Emission Reduction, Shandong University
| | - Zhiqiang Wang
- National Engineering Laboratory for Coal-fired Pollutants Emission Reduction, Shandong University
| | - Yong Dong
- National Engineering Laboratory for Coal-fired Pollutants Emission Reduction, Shandong University
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29
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Li L, Tang L, Liang X, Liu Z, Yang Y. Adsorption Performance of Acetone on Activated Carbon Modified by Microwave Heating and Alkali Treatment. JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 2016. [DOI: 10.1252/jcej.15we333] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Liqing Li
- School of Energy Science and Engineering, Central South University
| | - Lin Tang
- School of Energy Science and Engineering, Central South University
| | - Xin Liang
- School of Energy Science and Engineering, Central South University
| | - Zheng Liu
- College of Environment, Guangxi University
| | - Ye Yang
- School of Energy Science and Engineering, Central South University
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