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Camcıoğlu Ş, Özyurt B, Oturan N, Portehault D, Trellu C, Oturan MA. Heterogeneous electro-Fenton treatment of chemotherapeutic drug busulfan using magnetic nanocomposites as catalyst. CHEMOSPHERE 2023; 341:140129. [PMID: 37690550 DOI: 10.1016/j.chemosphere.2023.140129] [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: 05/24/2023] [Revised: 08/31/2023] [Accepted: 09/07/2023] [Indexed: 09/12/2023]
Abstract
The rapid and efficient mineralization of the chemotherapeutic drug busulfan (BSF) as the target pollutant has been investigated for the first time by three different heterogeneous EF systems that were constructed to ensure the continuous electro-generation of H2O2 and •OH consisting of: i) a multifunctional carbon felt (CF) based cathode composed of reduced graphene oxide (rGO), iron oxide nanoparticles and carbon black (CB) (rGO-Fe3O4/CB@CF), ii) rGO modified cathode (rGO/CB@CF) and rGO supported Fe3O4 (rGO-Fe3O4) catalyst and iii) rGO modified cathode (rGO/CB@CF) and multi walled carbon nanotube supported Fe3O4 (MWCNT-Fe3O4) catalyst. The effects of main variables, including the catalyst amount, applied current and initial pH were investigated. Based on the results, H2O2 was produced by oxygen reduction reaction (ORR) on the liquid-solid interface of both fabricated cathodes. •OH was generated by the reaction of H2O2 with the active site of ≡FeII on the surface of the multifunctional cathode and heterogeneous EF catalysts. Utilizing carbon materials with high conductivity, the redox cycling between ≡FeII and ≡FeIII was effectively facilitated and therefore promoted the performance of the process. The results demonstrated almost complete mineralization of BSF through the heterogeneous systems over a wide applicable pH range. According to the reusability and stability tests, multifunctional cathode exhibited outstanding performance after five consecutive cycles which is promising for the efficient mineralization of refractory organic pollutants. Moreover, intermediates products of BSF oxidation were identified and a plausible oxidation pathway was proposed. Therefore, this study demonstrates efficient and stable cathodes and catalysts for the efficient treatment of an anticancer active substance.
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Affiliation(s)
- Şule Camcıoğlu
- Ankara University, Faculty of Engineering, Department of Chemical Engineering, 06100, Tandogan, Ankara, Turkey; Université Gustave Eiffel, Laboratoire Géomatériaux et Environnement EA 4508, 77454, Marne-la-Vallée, Cedex 2, France.
| | - Baran Özyurt
- Ankara University, Faculty of Engineering, Department of Chemical Engineering, 06100, Tandogan, Ankara, Turkey; Université Gustave Eiffel, Laboratoire Géomatériaux et Environnement EA 4508, 77454, Marne-la-Vallée, Cedex 2, France
| | - Nihal Oturan
- Université Gustave Eiffel, Laboratoire Géomatériaux et Environnement EA 4508, 77454, Marne-la-Vallée, Cedex 2, France
| | - David Portehault
- Sorbonne Université, CNRS, Laboratoire de Chimie de La Matière Condensée de Paris (CMCP), 4 Place Jussieu, Paris, France
| | - Clément Trellu
- Université Gustave Eiffel, Laboratoire Géomatériaux et Environnement EA 4508, 77454, Marne-la-Vallée, Cedex 2, France
| | - Mehmet A Oturan
- Université Gustave Eiffel, Laboratoire Géomatériaux et Environnement EA 4508, 77454, Marne-la-Vallée, Cedex 2, France.
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2
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Manikandan V, Lee NY. Reduced graphene oxide: Biofabrication and environmental applications. CHEMOSPHERE 2023; 311:136934. [PMID: 36273614 DOI: 10.1016/j.chemosphere.2022.136934] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 10/04/2022] [Accepted: 10/16/2022] [Indexed: 06/16/2023]
Abstract
Green synthesis of high-quality reduced graphene oxide (rGO) from agro-industrial waste resources remains attractive owing to its outstanding environmental benefits. The remarkable properties of rGO include excellent morphology, uniform particle size, good optical properties, high conductivity, nontoxicity, and extraordinary chemical stability. Traditional methods for the synthesis of rGO nanomaterials involve several chemical reactions including oxidation, carbonization, toxic solvent, and pyrolysis which produce harmful byproducts. Green preparation of rGO is an emerging area of research in graphene technology which is cost-effective and sustainable in the procedure. Owing to the uniform particle rGO particle size, these smart nanomaterials have wide applicability, including in metal ions and pollutant sensing and adsorption, photocatalysis, optoelectrical devices, medical diagnosis, and drug delivery. Here we review the physicochemical properties of rGO, the biowaste sources and green methods of rGO synthesis, and the diverse applications of rGO, including in water purification and the biomedical fields. With this review, covering more than 200 research articles published on rGO in the last eight years ending in 2022, we aim to provide a quick guide for researchers seeking up-to-date information on the properties, production, and applicability of rGO, with special attention to rGO applications in water purification and the biomedical fields.
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Affiliation(s)
- Velu Manikandan
- Department of BioNano Technology, Gachon University, 1342 Seongnam-daero, Sujeong-gu, Seongnam-si, Gyeonggi-do, 13120, South Korea
| | - Nae Yoon Lee
- Department of BioNano Technology, Gachon University, 1342 Seongnam-daero, Sujeong-gu, Seongnam-si, Gyeonggi-do, 13120, South Korea.
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Chen X, Hong R, Chen H. Fabrication of PTCA-PANI composites for electromagnetic wave absorption and corrosion protection. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Banerjee AN. Green syntheses of graphene and its applications in internet of things (IoT)-a status review. NANOTECHNOLOGY 2022; 33:322003. [PMID: 35395654 DOI: 10.1088/1361-6528/ac6599] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Accepted: 04/08/2022] [Indexed: 06/14/2023]
Abstract
Internet of Things (IoT) is a trending technological field that converts any physical object into a communicable smarter one by converging the physical world with the digital world. This innovative technology connects the device to the internet and provides a platform to collect real-time data, cloud storage, and analyze the collected data to trigger smart actions from a remote location via remote notifications, etc. Because of its wide-ranging applications, this technology can be integrated into almost all the industries. Another trending field with tremendous opportunities is Nanotechnology, which provides many benefits in several areas of life, and helps to improve many technological and industrial sectors. So, integration of IoT and Nanotechnology can bring about the very important field of Internet of Nanothings (IoNT), which can re-shape the communication industry. For that, data (collected from trillions of nanosensors, connected to billions of devices) would be the 'ultimate truth', which could be generated from highly efficient nanosensors, fabricated from various novel nanomaterials, one of which is graphene, the so-called 'wonder material' of the 21st century. Therefore, graphene-assisted IoT/IoNT platforms may revolutionize the communication technologies around the globe. In this article, a status review of the smart applications of graphene in the IoT sector is presented. Firstly, various green synthesis of graphene for sustainable development is elucidated, followed by its applications in various nanosensors, detectors, actuators, memory, and nano-communication devices. Also, the future market prospects are discussed to converge various emerging concepts like machine learning, fog/edge computing, artificial intelligence, big data, and blockchain, with the graphene-assisted IoT field to bring about the concept of 'all-round connectivity in every sphere possible'.
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He P, Ma R, Li C, Ran L, Yuan W, Han YY, Deng L, Yan J. Molybdenum Blue Preassembly Strategy to Design Bimetallic Fe0.54Mo0.73/Mo2C@C for Tunable and Low-Frequency Electromagnetic Wave Absorption. Inorg Chem Front 2022. [DOI: 10.1039/d2qi00323f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Advanced electromagnetic wave absorption nanomaterials can play an important role in addressing the issue of increasing electromagnetic pollution in wireless communication field. Herein, a series of coralloid bimetallic Fe0.54Mo0.73/Mo2C@C (FMC)...
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He Z, Xie H, Wu H, Chen J, Ma S, Duan X, Chen A, Kong Z. Recent Advances in MXene/Polyaniline-Based Composites for Electrochemical Devices and Electromagnetic Interference Shielding Applications. ACS OMEGA 2021; 6:22468-22477. [PMID: 34514219 PMCID: PMC8427631 DOI: 10.1021/acsomega.1c02996] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 08/12/2021] [Indexed: 06/13/2023]
Abstract
Due to serious global warming and environmental issues, the demand for clean and sustainable energy storage devices is significantly increased. Often accompanied by rapid growth of portable electronic vehicles and devices, massive electromagnetic wave pollution becomes unavoidable. To mitigate the above two issues, this mini-review summaries preparation methods and recent developments of MXene/polyaniline-based composites for their applications in electrochemical devices and electromagnetic interference shielding. Based on excellent synergistic effects between single compounds and designed hierarchical structures, MXene/polyaniline-based composites usually exhibit enhanced physical and chemical properties, showing great potentials in sustainable electrochemical properties and electromagnetic wave protections for human health as well as normal operation of precise electronic devices.
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Affiliation(s)
- Zhiwei He
- Center
for Advanced Optoelectronic Materials, Key Laboratory of Novel Materials
for Sensor of Zhejiang Province, College of Materials and Environmental
Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Hangming Xie
- School
of Electronics Information, Hangzhou Dianzi
University, Hangzhou 310018, China
| | - Hanqing Wu
- School
of Mechanical Engineering, Hangzhou Dianzi
University, Hangzhou 310018, China
| | - Jiahao Chen
- Center
for Advanced Optoelectronic Materials, Key Laboratory of Novel Materials
for Sensor of Zhejiang Province, College of Materials and Environmental
Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Shiyu Ma
- Center
for Advanced Optoelectronic Materials, Key Laboratory of Novel Materials
for Sensor of Zhejiang Province, College of Materials and Environmental
Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Xing Duan
- Center
for Advanced Optoelectronic Materials, Key Laboratory of Novel Materials
for Sensor of Zhejiang Province, College of Materials and Environmental
Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Aqing Chen
- Center
for Advanced Optoelectronic Materials, Key Laboratory of Novel Materials
for Sensor of Zhejiang Province, College of Materials and Environmental
Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Zhe Kong
- Center
for Advanced Optoelectronic Materials, Key Laboratory of Novel Materials
for Sensor of Zhejiang Province, College of Materials and Environmental
Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
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Li T, Xia L, Yang H, Wang X, Zhang T, Huang X, Xiong L, Qin C, Wen G. Construction of a Cu-Sn Heterojunction Interface Derived from a Schottky Junction in Cu@Sn/rGO Composites as a Highly Efficient Dielectric Microwave Absorber. ACS APPLIED MATERIALS & INTERFACES 2021; 13:11911-11919. [PMID: 33682404 DOI: 10.1021/acsami.0c22049] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Developing high-performance dielectric absorbers, low filler loading, and a broad absorption band remains a great challenge for wireless data communication systems, household appliances, local area network, and so on. Herein, we report a facile green method to design and fabricate a copper-coated tin/reduced graphene oxide (Cu@Sn/rGO) composites with a heterojunction obtained by modifying a Schottky junction. The unique heterojunction can enable an appropriate balance between impedance and strong loss capacity. Meanwhile, it can not only promote the carrier migration but also obtain the rich interfaces. Consequently, a Cu@Sn/rGO composite with a heterojunction exhibits superior absorption intensity, far surpassing that of other absorbing materials reported. With a weight content of only 5 wt %, the maximum absorptivity reaches -49.19 dB at 6.08 GHz, and an effective absorption bandwidth (RL < -10 dB) of 13.94 GHz is achieved when the absorber's thickness ranges from 1.7 to 5.5 mm. This study provides new insights into the design and synthesis of a novel microwave absorption material with lightweight, smaller filler loading, and strong reflection loss.
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Affiliation(s)
- Tiantian Li
- School of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, China
| | - Long Xia
- School of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, China
| | - Hua Yang
- School of Science, Lanzhou University of Technology, Lanzhou 730050, China
| | - Xinyu Wang
- School of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, China
| | - Tao Zhang
- School of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, China
| | - Xiaoxiao Huang
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Li Xiong
- School of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, China
| | - Chunlin Qin
- School of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, China
| | - Guangwu Wen
- School of Materials Science and Engineering, Shandong University of Technology, Zibo 255000, China
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Lyu L, Wang F, Li B, Zhang X, Qiao J, Yang Y, Liu J. Constructing 1T/2H MoS2 nanosheets/3D carbon foam for high-performance electromagnetic wave absorption. J Colloid Interface Sci 2021; 586:613-620. [DOI: 10.1016/j.jcis.2020.10.129] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 10/27/2020] [Accepted: 10/28/2020] [Indexed: 12/27/2022]
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9
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Gao M, Li X, Qi D, Lin J. Green Synthesis of Porous Spherical Reduced Graphene Oxide and Its Application in Immobilized Pectinase. ACS OMEGA 2020; 5:32706-32714. [PMID: 33376908 PMCID: PMC7758952 DOI: 10.1021/acsomega.0c05078] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Accepted: 11/20/2020] [Indexed: 06/12/2023]
Abstract
Pectinase is widely used in juice production, food processes, and other fields. However, owing to poor stability, free pectinase is difficult to separate from a substrate after hydrolysis and cannot be reused, and thus its industrial use is limited. Immobilized pectinase can solve these problems well. We prepared a carrier material of immobilized enzyme, which is called porous spherical reduced graphene oxide (rGO) with a rich pore structure, large specific surface area, strong hardness, and good biocompatibility to enzyme. Then, we evaluated the performance of the porous spherical rGO immobilized pectinase and characterized its structure by IR, XRD, and SEM. Using this material as a carrier of immobilized enzyme improves the load and catalytic activity of the enzyme. After 10 times of continuous use, the porous spherical rGO immobilized enzyme still maintained its initial relative enzyme activity at around 87%, indicating that immobilized pectinase had a stronger cycling stability, and its thermal stability, acid-base tolerance, and storage stability were superior to those of free pectinase. The results were compared with those of other studies on immobilized pectinase. The relative activity of pectinase immobilized by porous spherical rGO was at a high level after 10 consecutive uses. Overall, the spherical rGO is an excellent immobilized enzyme carrier material.
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Affiliation(s)
- Min Gao
- Key Laboratory of
Oil and Gas Fine Chemicals, Ministry of Education & Xinjiang Uyghur
Autonomous Region, College of Chemistry, Xinjiang University, Urumqi, Xinjiang 830046, China
| | - Xiaoyuan Li
- Key Laboratory of
Oil and Gas Fine Chemicals, Ministry of Education & Xinjiang Uyghur
Autonomous Region, College of Chemistry, Xinjiang University, Urumqi, Xinjiang 830046, China
| | - Danping Qi
- Key Laboratory of
Oil and Gas Fine Chemicals, Ministry of Education & Xinjiang Uyghur
Autonomous Region, College of Chemistry, Xinjiang University, Urumqi, Xinjiang 830046, China
| | - Jiangli Lin
- Key Laboratory of Oil and Gas Fine Chemicals,
Ministry of Education & Xinjiang Uyghur Autonomous Region, School
of Chemical Engineering and Technology, Xinjiang University, Urumqi, Xinjiang 830046, China
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10
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Qureshi I, Khan S, Shifa MS, Wazir AH. Graphene oxide-based ZnFe2O4 catalyst for efficient adsorption and degradation of methylene blue from water. J DISPER SCI TECHNOL 2020. [DOI: 10.1080/01932691.2020.1839483] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Imdadullah Qureshi
- Department of Chemistry, University of Science & Technology, Bannu, Bannu, Pakistan
| | - Shaheedullah Khan
- Department of Chemistry, University of Science & Technology, Bannu, Bannu, Pakistan
| | | | - Arshad Hussain Wazir
- Department of Chemistry, University of Science & Technology, Bannu, Bannu, Pakistan
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11
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Wang L, Bai X, Zhao T, Lin Y. Facile synthesis of N, S-codoped honeycomb-like C/Ni3S2 composites for broadband microwave absorption with low filler mass loading. J Colloid Interface Sci 2020; 580:126-134. [DOI: 10.1016/j.jcis.2020.07.025] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 07/06/2020] [Accepted: 07/06/2020] [Indexed: 11/26/2022]
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12
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Zhao H, Xu X, Wang Y, Fan D, Liu D, Lin K, Xu P, Han X, Du Y. Heterogeneous Interface Induced the Formation of Hierarchically Hollow Carbon Microcubes against Electromagnetic Pollution. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2003407. [PMID: 33015974 DOI: 10.1002/smll.202003407] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 08/08/2020] [Indexed: 05/25/2023]
Abstract
Carbon materials with multilevel structural features are showing great potentials in electromagnetic (EM) pollution precaution. With ZIF-67 microcubes as a self-sacrificing precursor, hierarchical carbon microcubes with micro/mesoporous shells and hollow cavities have been successfully fabricated with the assistance of rigid SiO2 coating layers. It is found that the SiO2 layer can effectively counteract the inward shrinkage of organic frameworks during high-temperature pyrolysis due to intensive interfacial interaction. The obtained hollow porous carbon microcubes (HPCMCs) exhibit larger Brunauer-Emmett-Teller surface area and pore volume than porous carbon microcubes (PCMCs) directly derived from ZIF-67 microcubes. The unique microstructure is confirmed to be favorable for conductive loss and interfacial polarization, thus boosting the overall dielectric loss capability of carbon materials. Besides, hollow cavity will also promote multiple reflection of incident EM waves and intensify the dissipation of EM energy. As expected, HPCMCs harvest better microwave absorption performance, including strong reflection loss intensity and broad response bandwidth, than many traditional microporous/mesoporous carbon materials. This study provides a new strategy for the construction of hierarchical carbon materials and may inspire the design of carbon-based composites with excellent EM functions.
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Affiliation(s)
- Honghong Zhao
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Xianzhu Xu
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Yahui Wang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Dingge Fan
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Dawei Liu
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Kaifeng Lin
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Ping Xu
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Xijiang Han
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Yunchen Du
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China
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Zhang C, Peng Y, Song Y, Li J, Yin F, Yuan Y. Periodic Three-Dimensional Nitrogen-Doped Mesoporous Carbon Spheres Embedded with Co/Co 3O 4 Nanoparticles toward Microwave Absorption. ACS APPLIED MATERIALS & INTERFACES 2020; 12:24102-24111. [PMID: 32352278 DOI: 10.1021/acsami.0c03105] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Although various bio-inspired materials with outstanding mechanical, acoustic, and optic properties have been developed, bio-inspired materials for microwave absorption applications are rarely reported. Herein, under the inspiration of the opal structure, for the first time, a kind of Co@Co3O4/nitrogen-doped (N-doped) mesoporous carbon sphere (Co@Co3O4/NMCS) with a periodic three-dimensional structure toward microwave absorption application was designed and synthesized. The microwave absorption performance was optimized with respect to the content of Co@Co3O4 nanoparticles. Co@Co3O4/NMCS with ∼20 wt % Co@Co3O4 achieves a reflection loss of -53.8 dB at 5.7 GHz. The simulated radar cross section demonstrated that the Co@Co3O4/NMCS can efficiently suppress the strong electromagnetic scattering from a metal groove structure, which further reveals its excellent absorbing performance. These periodic porous structures of N-doped mesoporous carbon spheres combined with the magnetic Co@Co3O4 nanoparticles contribute to the excellent microwave-absorbing performance.
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Affiliation(s)
- Chengwei Zhang
- School of Materials Science and Engineering, Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, Hebei University of Technology, Tianjin 300130, China
| | - Yue Peng
- School of Materials Science and Engineering, Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, Hebei University of Technology, Tianjin 300130, China
| | - Yan Song
- School of Materials Science and Engineering, Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, Hebei University of Technology, Tianjin 300130, China
| | - Jianjun Li
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, School of Astronautics, Harbin Institute of Technology, Harbin 150080, People's Republic of China
| | - Fuxing Yin
- School of Materials Science and Engineering, Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, Hebei University of Technology, Tianjin 300130, China
| | - Ye Yuan
- School of Materials Science and Engineering, Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, Hebei University of Technology, Tianjin 300130, China
- National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, School of Astronautics, Harbin Institute of Technology, Harbin 150080, People's Republic of China
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14
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Chen TR, Wang YX, Lee WJ, Chen KHC, Chen JD. A reduced graphene oxide-supported iridium nanocatalyst for selective transformation of alcohols into carbonyl compounds via a green process. NANOTECHNOLOGY 2020; 31:285705. [PMID: 32191921 DOI: 10.1088/1361-6528/ab814d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A nanocatalyst constructed from reduced graphene oxide and iridium atoms (RGOIrNc) showed high selectivity (99%-100%) and reliability for the transformation of aromatic alcohols into carbonyl compounds via ultrasonication without using harmful chemicals and solvents. Experimental data including Fourier transform infrared spectroscopy, x-ray diffraction, spherical-aberration-corrected field emission transmission electron microscopy and Raman spectra confirmed the nanostructure of the RGOIrNc. Noticeably, the structural characteristics of this catalyst remained unchanged within 25 catalytic cycles and the activity and selectivity for the transformation of benzylic alcohols showed good stability. The average turnover frequency is greater than 9000 h-1, the total turnover number is more than 150 000 after 25 catalytic cycles and the productivity of carbonyl compounds reaches 376 048 [Formula: see text], indicating that RGOIrNc catalyst has good durability and stability and high 'greenness'.
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Affiliation(s)
- Tsun-Ren Chen
- Department of Applied Chemistry, National Ping Tung University, Pingtong City, Taiwan
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15
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Wang S, Xu Y, Fu R, Zhu H, Jiao Q, Feng T, Feng C, Shi D, Li H, Zhao Y. Rational Construction of Hierarchically Porous Fe-Co/N-Doped Carbon/rGO Composites for Broadband Microwave Absorption. NANO-MICRO LETTERS 2019; 11:76. [PMID: 34138043 PMCID: PMC7770714 DOI: 10.1007/s40820-019-0307-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 08/28/2019] [Indexed: 05/17/2023]
Abstract
Developing lightweight and broadband microwave absorbers for dealing with serious electromagnetic radiation pollution is a great challenge. Here, a novel Fe-Co/N-doped carbon/reduced graphene oxide (Fe-Co/NC/rGO) composite with hierarchically porous structure was designed and synthetized by in situ growth of Fe-doped Co-based metal organic frameworks (Co-MOF) on the sheets of porous cocoon-like rGO followed by calcination. The Fe-Co/NC composites are homogeneously distributed on the sheets of porous rGO. The Fe-Co/NC/rGO composite with multiple components (Fe/Co/NC/rGO) causes magnetic loss, dielectric loss, resistance loss, interfacial polarization, and good impedance matching. The hierarchically porous structure of the Fe-Co/NC/rGO enhances the multiple reflections and scattering of microwaves. Compared with the Co/NC and Fe-Co/NC, the hierarchically porous Fe-Co/NC/rGO composite exhibits much better microwave absorption performances due to the rational composition and porous structural design. Its minimum reflection loss (RLmin) reaches - 43.26 dB at 11.28 GHz with a thickness of 2.5 mm, and the effective absorption frequency (RL ≤ - 10 dB) is up to 9.12 GHz (8.88-18 GHz) with the same thickness of 2.5 mm. Moreover, the widest effective bandwidth of 9.29 GHz occurs at a thickness of 2.63 mm. This work provides a lightweight and broadband microwave absorbing material while offering a new idea to design excellent microwave absorbers with multicomponent and hierarchically porous structures.
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Affiliation(s)
- Shanshan Wang
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Zhuhai, 100081, People's Republic of China
| | - Yingchun Xu
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Zhuhai, 100081, People's Republic of China
| | - Ruru Fu
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Zhuhai, 100081, People's Republic of China
| | - Huanhuan Zhu
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Zhuhai, 100081, People's Republic of China
| | - Qingze Jiao
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Zhuhai, 100081, People's Republic of China
- School of Materials and the Environment, Beijing Institute of Technology, Zhuhai, 519085, People's Republic of China
| | - Tongying Feng
- School of Materials and the Environment, Beijing Institute of Technology, Zhuhai, 519085, People's Republic of China
| | - Caihong Feng
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Zhuhai, 100081, People's Republic of China
| | - Daxin Shi
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Zhuhai, 100081, People's Republic of China
| | - Hansheng Li
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Zhuhai, 100081, People's Republic of China
| | - Yun Zhao
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Zhuhai, 100081, People's Republic of China.
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Wang C, Li J, Guo S. Retracted Article: The influence of gradient and porous configurations on the microwave absorbing performance of multilayered graphene/thermoplastic polyurethane composite foams. RSC Adv 2019; 9:21859-21872. [PMID: 35518875 PMCID: PMC9066551 DOI: 10.1039/c9ra04735b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Accepted: 07/09/2019] [Indexed: 11/21/2022] Open
Abstract
Single-layer graphene/TPU composite foams with different graphene content were prepared through a thermally induced phase separation (TIPS) process. Multilayer graphene/TPU composite foams were fabricated by bonding single-layer foams together. The arrangement of single-layer graphene/TPU composite foams in different orders could realize a gradient distribution of the graphene to endow the multilayer foams with good impedance matching characteristics. Facile regulation of the effective absorption bandwidth (EB) value and minimum reflection loss (RLmin) have been realized by adjusting the thickness and layer number or altering the combinatorial mode of single-layer foams with different graphene contents to endow these multilayered composite foams with optimal microwave-absorbing (MA) properties. In addition, the mechanism of microwave dissipation by gradient multilayers and porous structures has been elucidated. The EB values of the multilayer foams were all wider than those of their corresponding single-layer foams with the same graphene content and multilayer foams displayed much lower RLmin than single-layer foams. Among all the multilayer foams, 2L graphene/TPU composite foams with a thickness of 5 mm exhibit the widest EB value of 9.9 GHz and the lower RLmin (-36.7 dB) while 5L graphene/TPU composite foams with a thickness of only 2.5 mm show the lowest RLmin of -43.7 dB and wider EB values (5.3 GHz).
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Affiliation(s)
- Chaozhi Wang
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University Chengdu 610065 China
| | - Jiang Li
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University Chengdu 610065 China
| | - Shaoyun Guo
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University Chengdu 610065 China
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