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Zhu R, Liu Q, He Y, Liang P. Rapid construction of nickel phyllosilicate with ultrathin layers and high performance for CO 2 methanation. J Colloid Interface Sci 2024; 668:352-365. [PMID: 38678890 DOI: 10.1016/j.jcis.2024.04.179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 04/21/2024] [Accepted: 04/24/2024] [Indexed: 05/01/2024]
Abstract
The traditional techniques for the synthesis of nickel phyllosilicates usually time-consuming and energy-intensive, which often lead to the formation of layers with excessive thickness due to uncontrolled crystal growth. In order to overcome these challenges, this work introduces a microwave-assisted synthesis strategy to facilitate the synthesis of Ni-phyllosilicate-based catalysts within an exceptionally short duration of only five minutes, attaining a peak temperature of merely 102 °C. To enhance the specific surface area and to increase the exposure of active sites, an investigation was conducted involving three surfactants. The employment of hexadecyl trimethyl ammonium bromide (CTAB) has yielded remarkable results, with an ultrahigh specific surface area reaching 535 m2 g-1 and an ultrathin lamellar thickness of 1.43 nm. The catalyst exhibited an impressive CO2 conversion of 81.7 % at 400 °C, 60 L g-1 h-1, 0.1 MPa. It also demonstrated a substantial turnover frequency for CO2 (TOFCO2) of 5.4 ± 0.1 × 10-2 s-1, alongside a relatively low activation energy (Ea) of 80.74 kJ·mol-1. Moreover, the catalyst maintained its high stability over a period of 100 h and displayed high resistance to sintering. To further elucidate growth temperature gradient of the catalyst and concentration gradient of the materials involved, COMSOL Multiphysics (COMSOL) simulations were effectively utilized. In conclusion, this work breaks the limitation associated with traditional, laborious synthesis methods for Ni-phyllosilicates, which can produce materials with high surface area and thin-layer characteristics.
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Affiliation(s)
- Ruixuan Zhu
- Key Laboratory of Low Carbon Energy and Chemical Engineering, Shandong University of Science and Technology, Qingdao 266590, China
| | - Qing Liu
- Key Laboratory of Low Carbon Energy and Chemical Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
| | - Yan He
- School of Chemistry and Chemical Engineering, Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, China.
| | - Peng Liang
- Key Laboratory of Low Carbon Energy and Chemical Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
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2
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Xu C, Xiao X, Cai C, Cheng Q, Zhu L, Zhang J, Wei B, Wang H. Insight into the differences in carbon dots prepared from fish scales using conventional hydrothermal and microwave methods. Environ Sci Pollut Res Int 2023; 30:54616-54627. [PMID: 36881236 DOI: 10.1007/s11356-023-26275-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 02/28/2023] [Indexed: 06/18/2023]
Abstract
The preparation of carbon dots (CDs) from waste fish scales is an attractive and high-value transformation. In this study, fish scales were used as a precursor to prepare CDs, and the effects of hydrothermal and microwave methods on their fluorescence properties and structures were evaluated. The microwave method was more conducive to the self-doping of nitrogen due to rapid and uniform heating. However, the low temperature associated with the microwave method resulted in insufficient dissolution of the organic matter in the fish scales, resulting in incomplete dehydration and condensation and the formation of nanosheet-like CDs, whose emission behavior had no significant correlation with excitation. Although the CDs prepared using the conventional hydrothermal method showed lower nitrogen doping, the relative pyrrolic nitrogen content was higher, which was beneficial in improving their quantum yield. Additionally, the controllable high temperature and sealed environment used in the conventional hydrothermal method promoted dehydration and condensation of the organic matter in the fish scales to form CDs with a higher degree of carbonization, uniform size, and higher C = O/COOH content. CDs prepared using the conventional hydrothermal method exhibited higher quantum yields and excitation wavelength-dependent emission behavior.
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Affiliation(s)
- Chengzhi Xu
- School of Chemistry and Environmental Engineering, Wuhan Polytechnic University, Changqing Garden, Wuhan, Hubei, China
| | - Xiao Xiao
- School of Food Science and Engineering, Wuhan Polytechnic University, Wuhan, Hubei, China
| | - Chaonan Cai
- School of Food Science and Engineering, Wuhan Polytechnic University, Wuhan, Hubei, China
| | - Qunpeng Cheng
- School of Chemistry and Environmental Engineering, Wuhan Polytechnic University, Changqing Garden, Wuhan, Hubei, China
| | - Lian Zhu
- School of Chemistry and Environmental Engineering, Wuhan Polytechnic University, Changqing Garden, Wuhan, Hubei, China
- School of Chemistry and Environmental Engineering, Hubei Minzu University, Enshi, Hubei, China
| | - Juntao Zhang
- School of Chemistry and Environmental Engineering, Wuhan Polytechnic University, Changqing Garden, Wuhan, Hubei, China
| | - Benmei Wei
- School of Chemistry and Environmental Engineering, Wuhan Polytechnic University, Changqing Garden, Wuhan, Hubei, China
| | - Haibo Wang
- School of Chemistry and Environmental Engineering, Wuhan Polytechnic University, Changqing Garden, Wuhan, Hubei, China.
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3
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Khushbu, Jindal R. Cyclodextrin mediated controlled release of edaravone from pH-responsive sodium alginate and chitosan based nanocomposites. Int J Biol Macromol 2022; 202:11-25. [PMID: 35031316 DOI: 10.1016/j.ijbiomac.2022.01.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 12/09/2021] [Accepted: 01/01/2022] [Indexed: 12/18/2022]
Abstract
The objective of the study is to enhance the aqueous solubility and stability of edaravone, a free radical scavenger drug. Inclusion complexes of edaravone with β-cyclodextrin were prepared by microwave irradiation and physical mixture method and confirmation of inclusion complexes were investigated by different analytical techniques such as FT-IR, ROESY, DSC, and 1H NMR. pH-sensitive nanocomposites based on chitosan (CH), sodium alginate (ALG), and bentonite (BN) were synthesized. To get the maximum percentage swelling different reaction parameters that are responsible for the synthesis of the nanocomposite were optimized and characterized by various techniques such as FESEM, EDS, XRD, and FT-IR. To regulate the drug delivery, inclusion complexes were directly loaded into the CH/ALG hydrogel, and CH/ALG/BN nanocomposite and release studies were evaluated at different pH environments. The solubility of edaravone was investigated by phase solubility and the graph results in a typical AL type behavior, suggesting the formation of a 1:1 stoichiometry inclusion complex. The comparative evaluation of drug release was explored by kinetic models. Controlled release of drug was achieved from CH/ALG/BN nanocomposite in comparison to CH/ALG hydrogel. The exploratory kinetic investigation revealed that β-CD plays a critical role in the drug release process by influencing polymer relaxation, resulting in slow release.
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Affiliation(s)
- Khushbu
- Polymer and Nanomaterial Lab, Department of Chemistry, Dr BR Ambedkar National Institute of Technology, Jalandhar 144011, Punjab, India.
| | - Rajeev Jindal
- Polymer and Nanomaterial Lab, Department of Chemistry, Dr BR Ambedkar National Institute of Technology, Jalandhar 144011, Punjab, India.
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Xiao C, Li H, Zhao Y, Zhang X, Wang X. Green synthesis of iron nanoparticle by tea extract (polyphenols) and its selective removal of cationic dyes. J Environ Manage 2020; 275:111262. [PMID: 32858272 DOI: 10.1016/j.jenvman.2020.111262] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 08/01/2020] [Accepted: 08/17/2020] [Indexed: 05/15/2023]
Abstract
The traditional synthesis of iron nanoparticles has the problems of high cost and secondary pollution. There is an urgent need for an economic, effective and environment-friendly method to solve this key issue. Here, the iron nanoparticles were prepared by a novel biosynthesis based on extracted tea polyphenols. Five kinds of tea were tested by microwave method, and the optimum extraction conditions were determined by orthogonal experiment L9 (34). The obtained materials were characterized by XRD, SEM, FTIR, XPS, Zeta potential and UV-Vis. The iron nanoparticle has a regular spherical or ellipsoidal shape with a particle size of about 75-100 nm. It was noted that it shows good selective removal for cationic dyes (malachite green (MG), rhodamine B (RB) and methylene blue (MB)). Kinetic experiment of iron nanoparticle on cationic dyes was in accordance with the pseudo first order kinetic model. Further, the possible removal mechanism was proposed, which mainly involves the process of adsorption and reduction. Mostly, its removal capacity of Malachite green reaches as high as 190.3 mg/g.
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Affiliation(s)
- Changyuan Xiao
- School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun, 130022, China
| | - Haiyan Li
- School of Life Science and Technology, Changchun University of Science and Technology, Changchun, 130022, China
| | - Yan Zhao
- School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun, 130022, China.
| | - Xin Zhang
- School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun, 130022, China
| | - Xiaoyu Wang
- School of Environment Sciences, Northeast Normal University, Changchun, 130117, China
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Monga D, Ilager D, Shetti NP, Basu S, Aminabhavi TM. 2D/2d heterojunction of MoS 2/g-C 3N 4 nanoflowers for enhanced visible-light-driven photocatalytic and electrochemical degradation of organic pollutants. J Environ Manage 2020; 274:111208. [PMID: 32814213 DOI: 10.1016/j.jenvman.2020.111208] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 08/04/2020] [Accepted: 08/06/2020] [Indexed: 06/11/2023]
Abstract
Photodegradation of toxic pollutants is a promising approach to deal with wastewater management. In this regard, MoS2/g-C3N4 (MSC) derived composites with varying weight-ratios were prepared via fast (30 min) one step microwave-assisted method. The materials were characterized by XRD, XPS, EDS, FESEM and HRTEM to validate their flower-like and sheet-like morphologies. The PL and UV-vis DRS spectra exhibited low recombination-rate and band-gap (1.7 eV), which is appropriate for an effective visible-light degradation. Photocatalytic performance of the catalysts was analyzed by investigating the degradation of methylene blue (MB) as well as pesticide fipronil. Best results were obtained by 5:1 MSC (98.7% degradation efficacy; rate constant 0.0261 min-1) in 80 min under the sunlight. The effects of solution pH, catalyst-dose, scavengers and illumination-area were also explored. The catalyst was reusable as confirmed by degradation studies (~82% efficiency) even after 5-cycles. The photocatalytic treatment of real industrial-wastewater was also conducted. The TOC and COD analysis validated that the treatment by as-prepared catalyst is more proficient for effluent-treatment than the industrial physico-chemical treatments. Electrochemical degradation of MB was also investigated using the glassy carbon electrode modified with different MSC-ratios. The electrode modified with 5:1 MSC at pH 7 manifested the maximum peak current. The plausible mechanisms for photocatalytic and electrochemical degradations were proposed, which suggested the remarkable potential the prepared nanocomposites for wastewater treatment.
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Affiliation(s)
- Divya Monga
- School of Chemistry and Biochemistry, Thapar Institute of Engineering & Technology, Patiala, 147004, India
| | - Davalasab Ilager
- Center for Electrochemical Science & Materials, Department of Chemistry, K.L.E. Institute of Technology, Hubballi, 580027, Karnataka, India
| | - Nagaraj P Shetti
- Center for Electrochemical Science & Materials, Department of Chemistry, K.L.E. Institute of Technology, Hubballi, 580027, Karnataka, India
| | - Soumen Basu
- School of Chemistry and Biochemistry, TIET-Virginia Tech Center of Excellence in Emerging Materials, Thapar Institute of Engineering and Technology, Patiala, 147004, India.
| | - Tejraj M Aminabhavi
- Department of Pharmaceutics, SET's College of Pharmacy, Dharwad, Karnataka, India.
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Yu J, Yuan K, Li X, Qin R, Li L, Yang X, Yu X, Zhang X, Lu Z, Liu H. Selective detection for seven kinds of antibiotics with blue emitting carbon dots and Al 3+ ions. Spectrochim Acta A Mol Biomol Spectrosc 2019; 223:117366. [PMID: 31323493 DOI: 10.1016/j.saa.2019.117366] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 06/09/2019] [Accepted: 07/07/2019] [Indexed: 06/10/2023]
Abstract
In this work, we presented a facile microwave method to prepare blue emitting carbon dots (CDs) using lysine as carbon source and realized the specific detection of seven types of antibiotics by CDs and Al3+ ions via a two-step method. The CDs have good solubility in water and their excitation spectra are exactly coincided with the absorption of some typical antibiotics, which leads to the fluorescence quenching of CDs (OFF state). The inhibition mechanism of fluorescence is induced by the combination of inner filtering effect (IFE) and static quenching effect (SQE). In addition, the quenched fluorescence can be recovered by adding Al3+ ions (On state), and seven types of antibiotics can be distinguished exactly according to the emission peak position and intensity. It not only provides a new and convenient method for the detection of antibiotics, but also provides a new idea for the further application of CDs in optical sensing.
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Affiliation(s)
- Jingjing Yu
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
| | - Kang Yuan
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
| | - Xiang Li
- Graduate School, Hebei University of Technology, Tianjin 300401, China
| | - Ruohan Qin
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
| | - Lanlan Li
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
| | - Xiaojing Yang
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
| | - Xiaofei Yu
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
| | - Xinghua Zhang
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China.
| | - Zunming Lu
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
| | - Hui Liu
- School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China.
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Sun Y, Li G, Wang W, Gu W, Wong PK, An T. Photocatalytic defluorination of perfluorooctanoic acid by surface defective BiOCl: Fast microwave solvothermal synthesis and photocatalytic mechanisms. J Environ Sci (China) 2019; 84:69-79. [PMID: 31284918 DOI: 10.1016/j.jes.2019.04.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 04/15/2019] [Accepted: 04/17/2019] [Indexed: 06/09/2023]
Abstract
There is an urgent need for developing cost-effective methods for the treatment of perfluorooctanoic acid (PFOA) due to its global emergence and potential risks. In this study, taking surface-defective BiOCl as an example, a strategy of surface oxygen vacancy modulation was used to promote the photocatalytic defluorination efficiency of PFOA under simulated sunlight irradiation. The defective BiOCl was fabricated by a fast microwave solvothermal method, which was found to induce more surface oxygen vacancies than conventional solvothermal and precipitation methods. As a result, the as-prepared BiOCl showed significantly enhanced defluorination efficiency, which was 2.7 and 33.8 times higher than that of BiOCl fabricated by conventional solvothermal and precipitation methods, respectively. Mechanistic studies indicated that the defluorination of PFOA follows a direct hole (h+) oxidation pathway with the aid of •OH, while the oxygen vacancies not only promote charge separation but also facilitate the intimate contact between the photocatalyst surface and PFOA by coordinating with its terminal carboxylate group in a bidentate or bridging mode. This work will provide a general strategy of oxygen vacancy modulation by microwave-assisted methods for efficient photocatalytic defluorination of PFOA in the environment using sunlight as the energy source.
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Affiliation(s)
- Yuanyuan Sun
- Guangzhou Key Laboratory Environmental Catalysis and Pollution Control, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Guiying Li
- Guangzhou Key Laboratory Environmental Catalysis and Pollution Control, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Wanjun Wang
- Guangzhou Key Laboratory Environmental Catalysis and Pollution Control, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
| | - Wenquan Gu
- Guangzhou Key Laboratory Environmental Catalysis and Pollution Control, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Po Keung Wong
- School of Life Sciences, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Taicheng An
- Guangzhou Key Laboratory Environmental Catalysis and Pollution Control, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
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He Y, Al-Abed SR, Dionysiou DD. Quantification of carbon nanotubes in different environmental matrices by a microwave induced heating method. Sci Total Environ 2017; 580:509-517. [PMID: 28040213 PMCID: PMC6146922 DOI: 10.1016/j.scitotenv.2016.11.205] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Revised: 11/28/2016] [Accepted: 11/29/2016] [Indexed: 05/05/2023]
Abstract
Carbon nanotubes (CNTs) have been incorporated into numerous consumer products, and have also been employed in various industrial areas because of their extraordinary properties. The large scale production and wide applications of CNTs make their release into the environment a major concern. Therefore, it is crucial to determine the degree of potential CNT contamination in the environment, which requires a sensitive and accurate technique for selectively detecting and quantifying CNTs in environmental matrices. In this study, a simple device based on utilizing heat generated/temperature increase from CNTs under microwave irradiation was built to quantify single-walled CNTs (SWCNTs), multi-walled CNTs (MWCNTs) and carboxylated CNTs (MWCNT-COOH) in three environmentally relevant matrices (sand, soil and sludge). Linear temperature vs CNT mass relationships were developed for the three environmental matrices spiked with known amounts of different types of CNTs that were then irradiated in a microwave at low energies (70-149W) for a short time (15-30s). MWCNTs had a greater microwave response in terms of heat generated/temperature increase than SWCNTs and MWCNT-COOH. An evaluation of microwave behavior of different carbonaceous materials showed that the microwave measurements of CNTs were not affected even with an excess of other organic, inorganic carbon or carbon based nanomaterials (fullerene, granular activated carbon and graphene oxide), mainly because microwave selectively heats materials such as CNTs that have a higher dielectric loss factor. Quantification limits using this technique for the sand, soil and sludge were determined as low as 18.61, 27.92, 814.4μg/g for MWCNTs at a microwave power of 133W and exposure time of 15s.
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Affiliation(s)
- Yang He
- Environmental Engineering and Science program, Department of Biomedical, Chemical and Environmental Engineering, University of Cincinnati, 2600 Clifton Ave., Cincinnati, OH 45221, United States
| | - Souhail R Al-Abed
- National Risk Management Research Laboratory, U.S. Environmental Protection Agency, 26 W. Martin Luther King Dr., Cincinnati, OH 45268, United States.
| | - Dionysios D Dionysiou
- Environmental Engineering and Science program, Department of Biomedical, Chemical and Environmental Engineering, University of Cincinnati, 2600 Clifton Ave., Cincinnati, OH 45221, United States
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