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Liu J, Gu J, Hu J, Ma H, Tao Y, Li G, Yue L, Li Y, Chen L, Cao F, Wu H, Li Z. Use of Mn 3 O 4 nanozyme to improve cotton salt tolerance. Plant Biotechnol J 2023; 21:1935-1937. [PMID: 37614040 PMCID: PMC10502746 DOI: 10.1111/pbi.14145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 06/28/2023] [Accepted: 07/22/2023] [Indexed: 08/25/2023]
Affiliation(s)
- Jiahao Liu
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, The Center of Plant NanobiotechnologyCollege of Plant Science & Technology, Huazhong Agricultural UniversityWuhanChina
- Hubei Hongshan LaboratoryWuhanChina
| | - Jiangjiang Gu
- College of Chemistry, Huazhong Agricultural UniversityWuhanChina
| | - Jin Hu
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, The Center of Plant NanobiotechnologyCollege of Plant Science & Technology, Huazhong Agricultural UniversityWuhanChina
- Hubei Hongshan LaboratoryWuhanChina
| | - Huixin Ma
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, The Center of Plant NanobiotechnologyCollege of Plant Science & Technology, Huazhong Agricultural UniversityWuhanChina
- Hubei Hongshan LaboratoryWuhanChina
| | - Yunpeng Tao
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, The Center of Plant NanobiotechnologyCollege of Plant Science & Technology, Huazhong Agricultural UniversityWuhanChina
- Hubei Hongshan LaboratoryWuhanChina
| | - Guangjing Li
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, The Center of Plant NanobiotechnologyCollege of Plant Science & Technology, Huazhong Agricultural UniversityWuhanChina
- Hubei Hongshan LaboratoryWuhanChina
| | - Lin Yue
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, The Center of Plant NanobiotechnologyCollege of Plant Science & Technology, Huazhong Agricultural UniversityWuhanChina
- Hubei Hongshan LaboratoryWuhanChina
| | - Yanhui Li
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, The Center of Plant NanobiotechnologyCollege of Plant Science & Technology, Huazhong Agricultural UniversityWuhanChina
- Hubei Hongshan LaboratoryWuhanChina
| | - Lu Chen
- College of Chemistry, Huazhong Agricultural UniversityWuhanChina
| | - Feifei Cao
- College of Chemistry, Huazhong Agricultural UniversityWuhanChina
| | - Honghong Wu
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, The Center of Plant NanobiotechnologyCollege of Plant Science & Technology, Huazhong Agricultural UniversityWuhanChina
- Hubei Hongshan LaboratoryWuhanChina
- College of Agronomy and Biotechnology, China Agricultural UniversityBeijingChina
| | - Zhaohu Li
- National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, The Center of Plant NanobiotechnologyCollege of Plant Science & Technology, Huazhong Agricultural UniversityWuhanChina
- Hubei Hongshan LaboratoryWuhanChina
- College of Agronomy and Biotechnology, China Agricultural UniversityBeijingChina
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2
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Peng D, Que M, Deng X, He Q, Zhao Y, Liao S, Li X, Qiu H. Mn 3O 4 nanoparticles decorated porous reduced graphene oxide with excellent oxidase-like activity for fast colorimetric detection of ascorbic acid. Mikrochim Acta 2023; 190:243. [PMID: 37247129 DOI: 10.1007/s00604-023-05822-y] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 05/04/2023] [Indexed: 05/30/2023]
Abstract
Mn3O4 nanoparticles composed of porous reduced graphene oxide nanosheets (Mn3O4@p-rGO) with enhanced oxidase-like activity were successfully fabricated through an in-situ approach for fast colorimetric detection of ascorbic acid (AA). The residual Mn2+ in the GO suspension of Hummers method was directly reused as the manganese source, improving the atom utilization efficiency. Benefiting from the uniform distribution of Mn3O4 nanoparticles on the surface of p-rGO nanosheets, the nanocomposite exhibited larger surface area, more active sites, and accelerated electron transfer efficiency, which enhanced the oxidase-like activity. Mn3O4@p-rGO nanocomposite efficiently activate dissolved O2 to generate singlet oxygen (1O2), leading to high oxidation capacity toward the substrate 3,3',5,5'-tetramethylbenzidine (TMB) without the extra addition of H2O2. Furthermore, the prominent absorption peak of the blue ox-TMB at 652 nm gradually decreased in the presence of AA, and a facile and fast colorimetric sensor was constructed with a good linear relationship (0.5-80 μM) and low LOD (0.278 μM) toward AA. Owing to the simplicity and excellent stability of the sensing platform, its practical application for AA detection in juices has shown good feasibility and reliability compared with HPLC and the 2, 4-dinitrophenylhydrazine colorimetric method. The oxidase-like Mn3O4@p-rGO provides a versatile platform for applications in food testing and disease diagnosis.
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Affiliation(s)
- Dong Peng
- School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou, 341000, China
| | - Mingming Que
- School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou, 341000, China
| | - Xiulong Deng
- School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou, 341000, China
| | - Qifang He
- School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou, 341000, China
| | - Yuhong Zhao
- School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou, 341000, China
| | - Shuzhen Liao
- School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou, 341000, China
| | - Xun Li
- School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou, 341000, China
| | - Hongdeng Qiu
- School of Chemistry and Chemical Engineering, Gannan Normal University, Ganzhou, 341000, China.
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China.
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Mahamad Yusoff NF, Idris NH, Md Din MF, Majid SR, Harun NA. Enhanced Electrochemical Performances of Mn 3O 4/Heteroatom-Doped Reduced Graphene Oxide Aerogels as an Anode for Sodium-Ion Batteries. Nanomaterials (Basel) 2022; 12:nano12203569. [PMID: 36296759 PMCID: PMC9607519 DOI: 10.3390/nano12203569] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 10/08/2022] [Accepted: 10/09/2022] [Indexed: 05/22/2023]
Abstract
Owing to their high theoretical capacity, transition-metal oxides have received a considerable amount of attention as potential anode materials in sodium-ion (Na-ion) batteries. Among them, Mn3O4 has gained interest due to the low cost of raw materials and the environmental compatibility. However, during the insertion/de-insertion process, Mn3O4 suffers from particle aggregation, poor conductivity, and low-rate capability, which, in turn, limits its practical application. To overcome these obstacles, we have successfully prepared Mn3O4 nanoparticles distributed on the nitrogen (N)-doped and nitrogen, sulphur (N,S)-doped reduced graphene oxide (rGO) aerogels, respectively. The highly crystalline Mn3O4 nanoparticles, with an average size of 15-20 nm, are homogeneously dispersed on both sides of the N-rGO and N,S-rGO aerogels. The results indicate that the N-rGO and N,S-rGO aerogels could provide an efficient ion transport channel for electrolyte ion stability in the Mn3O4 electrode. The Mn3O4/N- and Mn3O4/N,S-doped rGO aerogels exhibit outstanding electrochemical performances, with a reversible specific capacity of 374 and 281 mAh g-1, respectively, after 100 cycles, with Coulombic efficiency of almost 99%. The interconnected structure of heteroatom-doped rGO with Mn3O4 nanoparticles is believed to facilitate fast ion diffusion and electron transfer by lowering the energy barrier, which favours the complete utilisation of the active material and improvement of the structure's stability.
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Affiliation(s)
- Nor Fazila Mahamad Yusoff
- Energy Storage Research Group, Faculty of Ocean Engineering Technology and Informatics, Universiti Malaysia Terengganu, Kuala Nerus 21300, Terengganu, Malaysia
| | - Nurul Hayati Idris
- Energy Storage Research Group, Faculty of Ocean Engineering Technology and Informatics, Universiti Malaysia Terengganu, Kuala Nerus 21300, Terengganu, Malaysia
- Correspondence: ; Tel.: +60-96683185; Fax: +60-96683391
| | - Muhamad Faiz Md Din
- Department of Electrical and Electronic Engineering, Faculty of Engineering, National Defence University of Malaysia, Kem Sungai Besi, Kuala Lumpur 57000, Malaysia
| | - Siti Rohana Majid
- Center for Ionics University of Malaya, Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
| | - Noor Aniza Harun
- Advance Nano Materials (ANOMA) Research Group, Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, Kuala Nerus 21300, Terengganu, Malaysia
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Choi HS, Mathew AP, Uthaman S, Vasukutty A, Kim IJ, Suh SH, Kim CS, Ma SK, Graham SA, Kim SW, Park IK, Bae EH. Inflammation-sensing catalase-mimicking nanozymes alleviate acute kidney injury via reversing local oxidative stress. J Nanobiotechnology 2022; 20:205. [PMID: 35477452 PMCID: PMC9044883 DOI: 10.1186/s12951-022-01410-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 04/03/2022] [Indexed: 11/10/2022] Open
Abstract
Background The reactive oxygen species (ROS) and inflammation, a critical contributor to tissue damage, is well-known to be associated with various disease. The kidney is susceptible to hypoxia and vulnerable to ROS. Thus, the vicious cycle between oxidative stress and renal hypoxia critically contributes to the progression of chronic kidney disease and finally, end-stage renal disease. Thus, delivering therapeutic agents to the ROS-rich inflammation site and releasing the therapeutic agents is a feasible solution. Results We developed a longer-circulating, inflammation-sensing, ROS-scavenging versatile nanoplatform by stably loading catalase-mimicking 1-dodecanethiol stabilized Mn3O4 (dMn3O4) nanoparticles inside ROS-sensitive nanomicelles (PTC), resulting in an ROS-sensitive nanozyme (PTC-M). Hydrophobic dMn3O4 nanoparticles were loaded inside PTC micelles to prevent premature release during circulation and act as a therapeutic agent by ROS-responsive release of loaded dMn3O4 once it reached the inflammation site. Conclusions The findings of our study demonstrated the successful attenuation of inflammation and apoptosis in the IRI mice kidneys, suggesting that PTC-M nanozyme could possess promising potential in AKI therapy. This study paves the way for high-performance ROS depletion in treating various inflammation-related diseases. Graphical Abstract ![]()
Supplementary Information The online version contains supplementary material available at 10.1186/s12951-022-01410-z.
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Affiliation(s)
- Hong Sang Choi
- Departments of Internal Medicine, Chonnam National University Medical School, 160, Baekseo‑ro, Dong‑gu, Gwangju, 61469, Republic of Korea.,Departments of Internal Medicine, Chonnam National University Hospital, Gwangju, Republic of Korea
| | - Ansuja Pulickal Mathew
- Department of Biomedical Sciences, BK21 PLUS Center for Creative Biomedical Scientists, Chonnam National University Medical School, 160, Baekseo‑ro, Dong‑gu, Gwangju, 61469, Republic of Korea.,BioMedical Sciences Graduate Program (BMSGP), Chonnam National University, Hwasun-gun, Jeollanam-do, Republic of Korea
| | - Saji Uthaman
- Department of Biomedical Sciences, BK21 PLUS Center for Creative Biomedical Scientists, Chonnam National University Medical School, 160, Baekseo‑ro, Dong‑gu, Gwangju, 61469, Republic of Korea.,BioMedical Sciences Graduate Program (BMSGP), Chonnam National University, Hwasun-gun, Jeollanam-do, Republic of Korea
| | - Arathy Vasukutty
- Department of Biomedical Sciences, BK21 PLUS Center for Creative Biomedical Scientists, Chonnam National University Medical School, 160, Baekseo‑ro, Dong‑gu, Gwangju, 61469, Republic of Korea.,BioMedical Sciences Graduate Program (BMSGP), Chonnam National University, Hwasun-gun, Jeollanam-do, Republic of Korea
| | - In Jin Kim
- Departments of Internal Medicine, Chonnam National University Hospital, Gwangju, Republic of Korea
| | - Sang Heon Suh
- Departments of Internal Medicine, Chonnam National University Medical School, 160, Baekseo‑ro, Dong‑gu, Gwangju, 61469, Republic of Korea.,Departments of Internal Medicine, Chonnam National University Hospital, Gwangju, Republic of Korea
| | - Chang Seong Kim
- Departments of Internal Medicine, Chonnam National University Medical School, 160, Baekseo‑ro, Dong‑gu, Gwangju, 61469, Republic of Korea.,Departments of Internal Medicine, Chonnam National University Hospital, Gwangju, Republic of Korea
| | - Seong Kwon Ma
- Departments of Internal Medicine, Chonnam National University Medical School, 160, Baekseo‑ro, Dong‑gu, Gwangju, 61469, Republic of Korea.,Departments of Internal Medicine, Chonnam National University Hospital, Gwangju, Republic of Korea
| | - Sontyana Adonijah Graham
- Department of Biomedical Sciences, BK21 PLUS Center for Creative Biomedical Scientists, Chonnam National University Medical School, 160, Baekseo‑ro, Dong‑gu, Gwangju, 61469, Republic of Korea.,BioMedical Sciences Graduate Program (BMSGP), Chonnam National University, Hwasun-gun, Jeollanam-do, Republic of Korea
| | - Soo Wan Kim
- Departments of Internal Medicine, Chonnam National University Medical School, 160, Baekseo‑ro, Dong‑gu, Gwangju, 61469, Republic of Korea.,Departments of Internal Medicine, Chonnam National University Hospital, Gwangju, Republic of Korea
| | - In-Kyu Park
- Department of Biomedical Sciences, BK21 PLUS Center for Creative Biomedical Scientists, Chonnam National University Medical School, 160, Baekseo‑ro, Dong‑gu, Gwangju, 61469, Republic of Korea. .,BioMedical Sciences Graduate Program (BMSGP), Chonnam National University, Hwasun-gun, Jeollanam-do, Republic of Korea.
| | - Eun Hui Bae
- Departments of Internal Medicine, Chonnam National University Medical School, 160, Baekseo‑ro, Dong‑gu, Gwangju, 61469, Republic of Korea. .,Departments of Internal Medicine, Chonnam National University Hospital, Gwangju, Republic of Korea.
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Philip Raja S, Jayamoorthy K, Dhanalekshmi KI, Suresh S. Mn 3O 4 nanoparticles bearing 5-amino-2-mercapto benzimidazole moiety as antibacterial and antifungal agents. J Biomol Struct Dyn 2021; 40:7084-7090. [PMID: 33715599 DOI: 10.1080/07391102.2021.1894237] [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] [Indexed: 10/21/2022]
Abstract
The antibacterial and antifungal effects of non-functionalized and surface-functionalized Mn3O4 nanoparticles were comparatively analyzed to reason out the potential changes in antimicrobial activities due to functionalization with 5-amino-2-mercapto benzimidazole (AMB) molecule. The surface functionalization of Mn3O4 nanoparticles with AMB molecule was confirmed by the XRD result, which shows the shift in 2θ values with noticeable peaks. The surface morphology and functionalization of Mn3O4 nanoparticles were additionally confirmed by HR-SEM and EDAX studies. Antimicrobial activities were investigated by an agar-well-diffusion method using the bacteria Staphylococcus aureus and Pseudomonas aeruginosa and fungi Aspergillus niger. The functionalized Mn3O4 nanoparticles possess remarkable antibacterial and antifungal effect than the non-functionalized Mn3O4 nanoparticles and AMB molecule. The coating of low energy surface layer over metal oxide nanoparticles such as Mn3O4 offers an active surface toward both transfer of electron and the adsorption or desorption of water, inorganic ions, and other molecules, which leads to the increased antimicrobial activity of f-Mn3O4 nanoparticles.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- S Philip Raja
- Department of Physics, St. Joseph's Institute of Technology, Chennai, Tamil Nadu, India
| | - K Jayamoorthy
- Department of Chemistry, St. Joseph's College of Engineering, Chennai, Tamil Nadu, India
| | - K I Dhanalekshmi
- School of Mechanical Engineering, Beijing Institute of Technology, Beijing, China
| | - S Suresh
- Department of Physics, St. Joseph's College of Engineering, Chennai, Tamil Nadu, India
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Zhang X, Yue Z, Zhang H, Liu L, Zhou X. Repeated administrations of Mn 3O 4 nanoparticles cause testis damage and fertility decrease through PPAR-signaling pathway. Nanotoxicology 2020; 14:326-340. [PMID: 31909642 DOI: 10.1080/17435390.2019.1695976] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Potential health hazards of nanomaterials on male reproductive system have received raising concerns. Even though Mn3O4 nanoparticles (Mn3O4-NPs) is highly effective in clinical diagnostic and therapeutic applications of human disease, its potential toxic effect on the male reproductive system has not been reported. In this study, the testis damage and fertility decrease of male rats were conducted to testify the experimental reproductive injury induced by Mn3O4-NPs. After repeated tail vein injection with 10 mg/kg/week Mn3O4-NPs for 0, 60 and 120 days, Mn3O4-NPs accumulated in the testes resulted in oxidative stress and disorder of normal serum sex hormones. Experiments in vivo and in vitro indicated that mitochondria-mediated cell apoptosis were triggered via oxidative stress, demonstrated by the upregulation of malondialdehyde (MDA) and the depolarization of mitochondrial membrane potential. Notably, Mn3O4-NPs significantly resulted in a reduction of the quantity/quality of sperm and finally caused astonishing fertility decrease. Our preliminary result implied that the application of Mn3O4-NPs could be a double-edged sword and careful consideration should be given to the clinical uses.
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Affiliation(s)
- Xiao Zhang
- Center for Aircraft Fire and Emergency, Civil Aviation University of China, China
| | - Zongkai Yue
- Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, China
| | - Haijun Zhang
- Center for Aircraft Fire and Emergency, Civil Aviation University of China, China
| | - Lu Liu
- Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, China
| | - Xiaomeng Zhou
- Center for Aircraft Fire and Emergency, Civil Aviation University of China, China.,Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, China
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Zhao J, Li Y, He Y, Luo J. In Situ Green Synthesis of the New Sandwichlike Nanostructure of Mn 3O 4/Graphene as Lubricant Additives. ACS Appl Mater Interfaces 2019; 11:36931-36938. [PMID: 31356745 DOI: 10.1021/acsami.9b08993] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Nanoparticles and two-dimensional (2D) nanosheets are well-investigated as lubricant additives, which can significantly reduce frictional energy consumption. However, the tribological properties of the additives will deteriorate because of the occurrence of aggregation in the lubricant and the difficulty in entering the frictional contact area. In the present work, the new sandwichlike nanostructure of Mn3O4 nanoparticles and graphene nanosheets (Mn3O4@G) has been developed by an in situ green synthesis method; i.e., the impurities of Mn2+ ions in crude graphite oxide as the precursor are directly transferred into Mn3O4 precipitate between the graphene sheets. The graphene has a lamellar structure without folds and wrinkles, and the Mn3O4 nanoparticles are not only uniformly anchored on the graphene surfaces but also intercalated in the layers of the graphene nanosheets. The Mn3O4@G exhibits excellent tribological properties and high stability because of a synergistic lubrication effect between the graphene nanosheets and the Mn3O4 nanoparticles. Even at an ultralow concentration (0.075 wt %) and a high temperature of 125 °C, the friction coefficient and the wear depth have been reduced by 75% and 97% compared with base oil, respectively. The synthesis method and the Mn3O4@G nanocomposite have significant potential in various tribological applications for saving energy.
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Affiliation(s)
- Jun Zhao
- College of Mechanical and Electrical Engineering , Beijing University of Chemical Technology , Beijing 100029 , China
- State Key Laboratory of Tribology , Tsinghua University , Beijing 100084 , China
| | - Yingru Li
- Institute of Materials , China Academy of Engineering Physics , PO Box 9071-11, Mianyang , Sichuan 621908 , China
| | - Yongyong He
- State Key Laboratory of Tribology , Tsinghua University , Beijing 100084 , China
| | - Jianbin Luo
- State Key Laboratory of Tribology , Tsinghua University , Beijing 100084 , China
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Xue Q, Zhang Q. Agar Hydrogel Template Synthesis of Mn₃O₄ Nanoparticles through an Ion Diffusion Method Controlled by Ion Exchange Membrane and Electrochemical Performance. Nanomaterials (Basel) 2019; 9:E503. [PMID: 30939770 PMCID: PMC6524068 DOI: 10.3390/nano9040503] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 03/14/2019] [Accepted: 03/20/2019] [Indexed: 11/17/2022]
Abstract
A novel strategy, ion diffusion method controlled by ion exchange membrane combining with agar hydrogel template, was reported for the synthesis of Mn₃O₄ nanoparticles without any oxidizing agents. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and Brunauere-Emmette-Teller (BET) isotherm were carried out to characterize the structure, morphology, pore size and distribution and specific surface area of the as-prepared nanomaterials. It is shown that the morphology and size of Mn₃O₄ nanoparticles can be controlled by the concentration of agar hydrogel. All the specific capacitances of the Mn₃O₄ samples prepared with agar hydrogel template are much higher than that of Mn₃O₄ prepared without any template agent. The Mn₃O₄ sample prepared at 1.5 g L-1 of agar hydrogel solution exhibits a highest specific capacitance of 183.0 F g-1 at the current density of 0.5 A g-1, which is increased by 293% compared with that of Mn₃O₄ synthesized without any template agent. The results indicate that the ion diffusion method controlled by ion exchange membrane combining with agar hydrogel template is a convenient and effective approach for preparing inorganic nanomaterials.
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Affiliation(s)
- Qian Xue
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 Zhongguancun Street, Haidian District, Beijing 100081, China.
| | - Qiang Zhang
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, 5 Zhongguancun Street, Haidian District, Beijing 100081, China.
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