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Kawsar M, Sahadat Hossain M, Akter S, Farhad Ali M, Bahadur NM, Ahmed S. Synthesis and Characterization of Nano-Crystallite Triple Super Phosphate (TSP) from Marine Mollusk Waste: Babylonia japonica, Oliva sayana, and Conasprella bermudensis. ChemistryOpen 2024:e202400174. [PMID: 39248692 DOI: 10.1002/open.202400174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2024] [Revised: 07/01/2024] [Indexed: 09/10/2024] Open
Abstract
The study aims to synthesize nano-crystallite TSP using renewable, low-cost, waste marine mollusk from three different species such as Babylonia japonica, Oliva sayana, and Conasprella bermudensis. The molar ratio of phosphate to calcium in triple superphosphate [TSP, Ca(H2PO4)2.H2O] significantly impacts its properties and fertilizer performance, in this case, we kept the ratio to 2. Raw TSP has a high phosphate content and lower calcium content. The synthesized TSP was analyzed using various techniques including TGA, XRD, EDX, FT-IR, and SEM. The study utilized multiple XRD model equations to analyze crystallite size (< 100 n m ${\char60 100\hskip0.17em\hskip0.17em{\rm n}{\rm m}}$ ), with all models except the Liner straight-line method providing higher estimates for synthesized TSP. Furthermore, the values for stress (2×107 to 4×107 N/m2), strain (4×10-4 to 9×10-4), as well as energy density (4.54×103 to 16.27×103 J/m3) were also calculated for the synthesized product. However, the preferential growth calculation indicates that (010), (021), and (020) planes are the most thermodynamically stable planes for the growth of the synthesized TSP. Apart from that, FTIR result confirms that CaO, -OH, as well as PO4 3- functional groups are present in the synthesized products. This research suggests that marine mollusks can be utilized as a calcium precursor for P-fertilizer and 60 % phosphoric acid, thereby reducing production costs by eliminating additional dehydrating. Additionally, waste marine mollusk shells could be utilized as an alternative to the production of phosphate-based fertilizer.
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Affiliation(s)
- Md Kawsar
- Glass Research Division, Institute of Glass & Ceramic Research and Testing, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka, 1205, Bangladesh
- Department of Applied Chemistry and Chemical Engineering, Noakhali Science and Technology University, Noakhali, Bangladesh
| | - Md Sahadat Hossain
- Glass Research Division, Institute of Glass & Ceramic Research and Testing, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka, 1205, Bangladesh
| | - Sumaiya Akter
- Department of Applied Chemistry and Chemical Engineering, Noakhali Science and Technology University, Noakhali, Bangladesh
| | - Md Farhad Ali
- Institute of Leather Engineering and Technology, University of Dhaka, Dhaka, 1000, Bangladesh
| | - Newaz Mohammed Bahadur
- Department of Applied Chemistry and Chemical Engineering, Noakhali Science and Technology University, Noakhali, Bangladesh
| | - Samina Ahmed
- Glass Research Division, Institute of Glass & Ceramic Research and Testing, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka, 1205, Bangladesh
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Lam TQ, Tran ATQ, Le Anh Phan T, Zitzmann F, Van Ho Phan N, Nguyen KT. Enhancing extraction efficiency of carpaine in Carica papaya L. leaves: coupling acid-base extraction with surfactant-assisted micro-flotation. RSC Adv 2024; 14:28768-28778. [PMID: 39263437 PMCID: PMC11388190 DOI: 10.1039/d4ra05132g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2024] [Accepted: 08/27/2024] [Indexed: 09/13/2024] Open
Abstract
Carpaine, a major alkaloid in papaya leaves, has considerable cardiovascular benefits alongside its notable effects on muscle relaxation when utilized in medicine. In this study, the coupling of acid-base extraction and flotation was developed to completely remove the use of toxic solvents. This method entails the extraction of carpaine from Carica papaya L. leaves using hot water extraction alongside ultrasound-assisted extraction followed by the condensation of the species using surfactant-assisted flotation. The acid-base extraction was applied to alter the solubility of carpaine as desired at different stages of the process. The results showed that the carpaine extraction yield using all the treatments in conjunction was significantly higher compared to the control samples in which the acid-base extraction or flotation was not applied. The TLC and GC-FID results suggested that the bubbles introduced during the flotation were highly specific toward their interactions with carpaine in its hydrophobic complex form. The quantity of carpaine extracted using our method, in comparison to the amount of carpaine obtained using a different method from a previous study that utilized ethanolic extraction, exhibited a 2.32-fold greater extraction yield. This work demonstrates the importance of flexible utilization of both surface and bulk chemistry in achieving an improved solution for a technical problem.
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Affiliation(s)
- Thien Quang Lam
- School of Biotechnology, International University, Vietnam National University Ho Chi Minh City 700000 Vietnam +84 8 3724 4271 +84 8 3724 4270
| | - Anh Thi Quynh Tran
- School of Biotechnology, International University, Vietnam National University Ho Chi Minh City 700000 Vietnam +84 8 3724 4271 +84 8 3724 4270
| | - Thu Le Anh Phan
- School of Biotechnology, International University, Vietnam National University Ho Chi Minh City 700000 Vietnam +84 8 3724 4271 +84 8 3724 4270
| | - Florian Zitzmann
- School of Biotechnology, International University, Vietnam National University Ho Chi Minh City 700000 Vietnam +84 8 3724 4271 +84 8 3724 4270
| | - Nam Van Ho Phan
- University of Medicine and Pharmacy at Ho Chi Minh City Ho Chi Minh City Vietnam
| | - Khoi Tan Nguyen
- School of Biotechnology, International University, Vietnam National University Ho Chi Minh City 700000 Vietnam +84 8 3724 4271 +84 8 3724 4270
- School of Chemical Engineering, The University of Queensland Brisbane QLD 4072 Australia
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Tan J, Xie J, Zhang YF. Synthesis and Micellization of Carbosilane Sulfonate Surfactants with Short Alkyl Chains. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:15997-16005. [PMID: 37909176 DOI: 10.1021/acs.langmuir.3c02027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
Carbosilane surfactants, consisting of carbosilane as a hydrophobic group linked to hydrophilic groups, are one kind of silicone surfactants. In this paper, a series of carbosilane sulfonate surfactants with short alkyl chains (Cn-Si2C-SO3Na (n = 1-6)), Me-Si2C-SO3Na, Et-Si2C-SO3Na, Pr-Si2C-SO3Na, Bu-Si2C-SO3Na, Pen-Si2C-SO3Na, and Hex-Si2C-SO3Na, were prepared and characterized by 29 Si NMR, 1H NMR, and FT-IR spectroscopies. The influence of the alkyl chain length on their micellization was studied using surface tension, dynamic light scattering, conductivity, and transmission electron microscopy. The CMC value decreases with increasing length of the short alkyl group. The γCMC value of Cn-Si2C-SO3Na (n = 1-6) increases as the alkyl chain increases from methyl to propyl, while the γCMC value gradually decreases as the alkyl chain increases from propyl to hexyl. The larger and rigid tetramethyldicarbosilane group functioned synergistically with a short alkyl chain, resulting in carbosilane sulfonate surfactants adsorbing at the air/water interface with a rugby ball shape; accordingly, the Amin values of the investigated carbosilane sulfonate surfactants increase with increasing length of the alkyl chain. The micellization process of carbosilane sulfonate surfactants is enthalpy-driven at lower temperatures and entropy-driven at high temperatures. The ΔHm0 values became more negative and ΔSm0 values more positive as the alkyl chain length increased. Aggregates in the range of 10-800 nm were observed for Cn-Si2C-SO3Na (n = 1-6) in an aqueous solution, and the hydrodynamic diameter (Dh) decreased with increasing length of the short alkyl group.
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Affiliation(s)
- Jinglin Tan
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, School of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha 410114, China
| | - Jiangbin Xie
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, School of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha 410114, China
| | - Yue-Fei Zhang
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, School of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha 410114, China
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Li W, Huang Z, Wang H, Liu R, Ouyang L, Shuai S, Zhang S, Cheng C, Yu X, He G, Fu W. Froth flotation separation of phosphate ore using a novel hammer-like amidoxime surfactant. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2022.122817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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Wang Q, Tuo L, Zhou G, Zhang Y, Geng X, Zhang F, Li Y. Effect of silicones and polymers on the wetting and foaming properties of anionic and nonionic hydrocarbon surfactants. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:81713-81725. [PMID: 35739450 DOI: 10.1007/s11356-022-21517-y] [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: 03/01/2022] [Accepted: 06/13/2022] [Indexed: 06/15/2023]
Abstract
To better understand the effects of nonionic silicones and polymers on the wetting and foaming properties of anionic and nonionic hydrocarbon surfactants and different forces between molecules, nonionic silicone surfactant (GT-248), polymer (HPMC), anionic surfactant (AES), and nonionic surfactants (APG0810) were selected. The CMC ratio is used as a reference to determine the concentration ratio of the APG0810/GT-248 and AES/GT-248 compound solutions, after which HPMC was added to form a compound solution to test the wetting and foaming properties of the compound solution. The results showed that GT-248 obtained a high density of methyl groups on the surface of the solution due to its excellent spreadability and good flexibility of the siloxane chain, effectively reduces the surface tension and wetting time of AES and APG0810 solutions. But in terms of foam performance, after adding GT-248 to solution, the foam stability of AES solution is enhanced, the foam height of AES solution was reduced by 33.7%, the foam stability of APG0810 solution is weakened a lot, and the foam height of APG0810 solution was reduced by 85.4%. Mainly because of the difference in electronegativity between the AES and APG0810 head groups, the strong electronegativity between the AES head groups resulted in a smaller number of GT-248 insertions in the liquid film, which weakened the defoaming effect of GT-248. The weak interaction between the head groups of APG0810 resulted in a higher amount of GT-248 in the liquid film, and thus, the foam performance was greatly reduced. After the AES/GT-248 compound solution was preferred, by comparing the viscosity, surface tension, and the half-life of the foam, it was found that the addition of low concentration of polymer effectively improved the half-life of the foam without affecting the foaming properties, and the final choice of 4:1(AES/GT-248) + 1mgHPMC and 2:1(AES/GT-248) + 1mgHPMC composite solutions can be used as a superior dust suppression material.
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Affiliation(s)
- Qingguo Wang
- College of Safety Science and Engineering, Nanjing Tech University, Nanjing, 211816, China.
| | - Lina Tuo
- College of Safety Science and Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Gang Zhou
- Key Laboratory of Mining Disaster Prevention and Control, Qingdao, 266590, China
| | - Yuanyuan Zhang
- College of Safety Science and Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Xu Geng
- College of Safety Science and Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Fasong Zhang
- College of Safety Science and Engineering, Nanjing Tech University, Nanjing, 211816, China
| | - Yonghe Li
- College of Safety Science and Engineering, Nanjing Tech University, Nanjing, 211816, China
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Huang Z, Li W, Shuai S, Zhang S, Wang H, Liu R, Cheng C, Yu X, He G, Fu W. Iron ore production using a new Gemini surfactant at 273 K. Chem Commun (Camb) 2022; 58:8678-8681. [PMID: 35822925 DOI: 10.1039/d2cc02705d] [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
Herein we present the use of a Gemini surfactant and reverse froth flotation to efficiently separate magnetite from quartz and produce iron ore at 273 K. This surfactant achieved an obviously superior flotation performance (TFe recovery increased by 48.18%), and the dosage of the Gemini surfactant was three times less than that of a conventional monomeric surfactant. Our findings are expected to serve as a general guide to design a new and excellent collector for high-efficiency mineral flotation and to lead to an efficient and clean development of mineral resources.
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Affiliation(s)
- Zhiqiang Huang
- Jiangxi Key Laboratory of Mining Engineering, Jiangxi University of Science and Technology, Ganzhou, Jiangxi, 34100, China.
| | - Wenyuan Li
- Jiangxi Key Laboratory of Mining Engineering, Jiangxi University of Science and Technology, Ganzhou, Jiangxi, 34100, China.
| | - Shuyi Shuai
- Jiangxi Key Laboratory of Mining Engineering, Jiangxi University of Science and Technology, Ganzhou, Jiangxi, 34100, China.
| | - Shiyong Zhang
- Jiangxi Key Laboratory of Mining Engineering, Jiangxi University of Science and Technology, Ganzhou, Jiangxi, 34100, China.
| | - Hongling Wang
- Guangdong Institute of Resources Comprehensive Utilization, Guangzhou, 510650, China
| | - Rukuan Liu
- Hunan Academy of Forestry, Changsha, Hunan, 410004, China
| | - Chen Cheng
- School of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China
| | - Xinyang Yu
- Jiangxi Key Laboratory of Mining Engineering, Jiangxi University of Science and Technology, Ganzhou, Jiangxi, 34100, China.
| | - Guichun He
- Jiangxi Key Laboratory of Mining Engineering, Jiangxi University of Science and Technology, Ganzhou, Jiangxi, 34100, China.
| | - Weng Fu
- School of Chemical Engineering, The University of Queensland, St Lucia, 4072 QLD, Australia
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Cheng Y, Zhang S, Wang J, Zhao Y, Zhang Z. Research progress in the synthesis and application of surfactants based on trisiloxane. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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8
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Peng X, Liu W, Liu W, Zhao P, Yu X, Wang Y. Fabrication of eco-friendly adsorbent derived from serpentine tailings for the removal of organic dyes. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128761] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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9
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Cao Z, Wu X, Khoso SA, Zhang W, Liu Y, Tian M, Wang J. Effect mechanism of nonane-1,1-bisphosphonic acid as an alternative collector in monazite flotation: Experimental and calculational studies. J RARE EARTH 2022. [DOI: 10.1016/j.jre.2021.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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10
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Froth flotation separation of lepidolite ore using a new Gemini surfactant as the flotation collector. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.119122] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Flotation separation mechanism for secondary copper sulfide minerals and pyrite using novel collector ethyl isobutyl xanthogenic acetate. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.128010] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Chai X, Lin S, Zhai J, Kang J, Chen P, Liu R. A new combined collector for flotation separation of ilmenite from titanaugite in acidic pulp. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119647] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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13
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Lv Y, Cheng D, Jiang Y, Han C, Li K, Ren S, He Z, Dai L, Wang L. Electrospinning technology to prepare in-situ Cr2O3 modified carbon nanofibers as dual-function electrode material for vanadium redox battery. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127287] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Separation of wolframite ore by froth flotation using a novel “crab” structure sebacoyl hydroxamic acid collector without Pb(NO3)2 activation. POWDER TECHNOL 2021. [DOI: 10.1016/j.powtec.2021.05.017] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Synergistic Catalysis of SnO 2/Reduced Graphene Oxide for VO 2+/VO 2+ and V 2+/V 3+ Redox Reactions. Molecules 2021; 26:molecules26165085. [PMID: 34443673 PMCID: PMC8401850 DOI: 10.3390/molecules26165085] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/18/2021] [Accepted: 08/18/2021] [Indexed: 11/17/2022] Open
Abstract
In spite of their low cost, high activity, and diversity, metal oxide catalysts have not been widely applied in vanadium redox reactions due to their poor conductivity and low surface area. Herein, SnO2/reduced graphene oxide (SnO2/rGO) composite was prepared by a sol–gel method followed by high-temperature carbonization. SnO2/rGO shows better electrochemical catalysis for both redox reactions of VO2+/VO2+ and V2+/V3+ couples as compared to SnO2 and graphene oxide. This is attributed to the fact that reduced graphene oxide is employed as carbon support featuring excellent conductivity and a large surface area, which offers fast electron transfer and a large reaction place towards vanadium redox reaction. Moreover, SnO2 has excellent electrochemical activity and wettability, which also boost the electrochemical kinetics of redox reaction. In brief, the electrochemical properties for vanadium redox reactions are boosted in terms of diffusion, charge transfer, and electron transport processes systematically. Next, SnO2/rGO can increase the energy storage performance of cells, including higher discharge electrolyte utilization and lower electrochemical polarization. At 150 mA cm−2, the energy efficiency of a modified cell is 69.8%, which is increased by 5.7% compared with a pristine one. This work provides a promising method to develop composite catalysts of carbon materials and metal oxide for vanadium redox reactions.
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Xie H, Liu Y, Rao B, wu J, Gao L, Chen L, Tian X. Selective passivation behavior of galena surface by sulfuric acid and a novel flotation separation method for copper-lead sulfide ore without collector and inhibitor. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118621] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Feng X, Zhang Z, Zhang T, Xue J, Han C, Dai L, Wang L, He Z. Enhanced Catalysis of P-doped SnO 2 for the V 2+/V 3+ Redox Reaction in Vanadium Redox Flow Battery. Front Chem 2021; 9:688634. [PMID: 34249863 PMCID: PMC8263913 DOI: 10.3389/fchem.2021.688634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 05/10/2021] [Indexed: 11/23/2022] Open
Abstract
In this work, nanosized P-doped SnO2 (SnO2-P) was prepared by a sol–gel method as a catalyst for the V3+/V2+ redox reaction in vanadium redox flow battery. Compared with SnO2, the electrochemical performance of SnO2-P is significantly improved. This is because P doping provides more active sites and shows greatly improved electrical conductivity, thereby increasing the electron transfer rate. As a result, SnO2-P shows better catalytic performance than SnO2. The SnO2-P modified cell is designed, and it exhibits an increase of 47.2 mA h in discharge capacity and 8.7% in energy efficiency compared with the pristine cell at 150 mA cm−2. These increases indicate that the modified cell has a higher electrolyte utilization rate. This study shows that SnO2-P is a new and efficient catalyst for vanadium redox flow battery.
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Affiliation(s)
- Xiaojian Feng
- School of Chemical Engineering, North China University of Science and Technology, Tangshan, China
| | - Zixuan Zhang
- School of Chemical Engineering, North China University of Science and Technology, Tangshan, China
| | - Tongxue Zhang
- School of Chemical Engineering, North China University of Science and Technology, Tangshan, China
| | - Jing Xue
- School of Chemical Engineering, North China University of Science and Technology, Tangshan, China
| | - Chao Han
- School of Chemical Engineering, North China University of Science and Technology, Tangshan, China
| | - Lei Dai
- School of Chemical Engineering, North China University of Science and Technology, Tangshan, China
| | - Ling Wang
- School of Chemical Engineering, North China University of Science and Technology, Tangshan, China
| | - Zhangxing He
- School of Chemical Engineering, North China University of Science and Technology, Tangshan, China
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Feng X, Xue J, Zhang T, Zhang Z, Han C, Dai L, Wang L, He Z. Synergistic Catalysis of SnO 2-CNTs Composite for VO 2 + /VO 2+ and V 2+/V 3+ Redox Reactions. Front Chem 2021; 9:671575. [PMID: 34026731 PMCID: PMC8131550 DOI: 10.3389/fchem.2021.671575] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 04/12/2021] [Indexed: 11/13/2022] Open
Abstract
In this study, a SnO2-carbon nanotube (SnO2-CNT) composite as a catalyst for vanadium redox flow battery (VRFB) was prepared using a sol-gel method. The effects of this composite on the electrochemical performance of VO 2 + /VO2+, and on the V2+/V3+ redox reactions and VRFB performance were investigated. The SnO2-CNT composite has better catalytic activity than pure SnO2 and CNT due to the synergistic catalysis of SnO2 and the CNT. SnO2 mainly provides the catalytic active sites and the CNTs mainly provide the three-dimensional structure and high electrical conductivity. Therefore, the SnO2-CNT composite has a larger specific surface area and an excellent synergistic catalytic performance. For cell performance, it was found that the SnO2-CNT cell shows a greater discharge capacity and energy efficiency. In particular, at 150 mA cm-2, the discharge capacity of the SnO2-CNT cell is 28.6 mAh higher than that of the pristine cell. The energy efficiency of the modified cell (7%) is 7.2% higher than that of the pristine cell (62.8%). This study shows that the SnO2-CNT is an efficient and promising catalyst for VRFB.
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Affiliation(s)
- Xiaojian Feng
- School of Chemical Engineering, North China University of Science and Technology, Tangshan, China
| | - Jing Xue
- School of Chemical Engineering, North China University of Science and Technology, Tangshan, China
| | - Tongxue Zhang
- School of Chemical Engineering, North China University of Science and Technology, Tangshan, China
| | - Zixuan Zhang
- School of Chemical Engineering, North China University of Science and Technology, Tangshan, China
| | - Chao Han
- School of Chemical Engineering, North China University of Science and Technology, Tangshan, China
| | - Lei Dai
- School of Chemical Engineering, North China University of Science and Technology, Tangshan, China
| | - Ling Wang
- School of Chemical Engineering, North China University of Science and Technology, Tangshan, China
| | - Zhangxing He
- School of Chemical Engineering, North China University of Science and Technology, Tangshan, China
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Saita S, Anzai M, Mori N, Kawasaki H. Controlled aggregation of methylene blue in silica–methylene blue nanocomposite for enhanced 1O2 generation. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126360] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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20
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do Valle SF, Giroto AS, Reis HPG, Guimarães GGF, Ribeiro C. Synergy of Phosphate-Controlled Release and Sulfur Oxidation in Novel Polysulfide Composites for Sustainable Fertilization. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:2392-2402. [PMID: 33600152 DOI: 10.1021/acs.jafc.0c07333] [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] [Indexed: 05/10/2023]
Abstract
The development of smart and eco-friendly fertilizers is pivotal to guarantee food security sustainably. Phosphate rock and struvite are promising alternatives for P fertilization; nevertheless, the solubility of these sources is a challenge for consistent use efficiency. Here, we propose using a polysulfide obtained via inverse vulcanization as a novel controlled-release fertilizer matrix in a system containing either Bayóvar rock (Bay) or struvite (Str). The polysulfide provides S for plants after being biologically oxidized to sulfate in soil, generating local acidity for P solubilization. After 15 days of soil incubation, the composites with 75 wt % Str and 75 wt % Bay achieved, respectively, 3 and 2 times the S oxidation from the elemental sulfur reference. Results indicated that P content stimulates the soil microorganisms' activity for S oxidation. The matrix had a physical role in improving Bay dissolution and regulating the rapid release from Str. Moreover, the available P in soil was 25-30 mg/dm3 for Bay composites, while for pure Bay, it was 9 mg/dm3.
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Affiliation(s)
- Stella Fortuna do Valle
- Department of Chemistry, Federal University of São Carlos, Washington Luiz Highway, km 235, 13565-905 São Carlos, SP, Brazil
- Embrapa Instrumentation, XV de Novembro Street, 1452, 13560-970 São Carlos, SP, Brazil
| | - Amanda Soares Giroto
- Embrapa Instrumentation, XV de Novembro Street, 1452, 13560-970 São Carlos, SP, Brazil
| | | | - Gelton G F Guimarães
- Agricultural Research and Rural Extension Company of Santa Catarina, 6800 Highway, Antônio Heil, 88318-112 Itajaí, SC, Brazil
| | - Caue Ribeiro
- Embrapa Instrumentation, XV de Novembro Street, 1452, 13560-970 São Carlos, SP, Brazil
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