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Rao Y, Zhou C, Wu P, Fan J, Zhang Y, Yang H, Pu S. Molecular structure-dependent contribution of reactive species to organic pollutant degradation using nanosheet Bi 2Fe 4O 9 activated peroxymonosulfate. JOURNAL OF HAZARDOUS MATERIALS 2023; 452:131240. [PMID: 37030220 DOI: 10.1016/j.jhazmat.2023.131240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 03/15/2023] [Accepted: 03/16/2023] [Indexed: 06/19/2023]
Abstract
Iron-based catalysts have attracted increasing attention in heterogeneous activation of peroxymonosulfate (PMS). However, the activity of most iron-based heterogenous catalysts is not satisfactory for practical application and the proposed activation mechanisms of PMS by iron-based heterogenous catalyst vary case by case. This study prepared Bi2Fe4O9 (BFO) nanosheet with super high activity toward PMS, which was comparable to its homogeneous counterpart at pH 3.0 and superior to its homogeneous counterpart at pH 7.0. Fe sites, lattice oxygen and oxygen vacancies on BFO surface were believed to be involved in the activation of PMS. By using electron paramagnetic resonance (EPR), radical scavenging tests, 57Fe Mössbauer and 18O isotope-labeling technique, the generation of reactive species including sulfate radicals, hydroxyl radicals, superoxide and Fe (IV) were confirmed in BFO/PMS system. However, the contribution of reactive species to the elimination of organic pollutants very much depends on their molecular structure. The effect of water matrices on the elimination of organic pollutants also hinges on their molecular structure. This study implies that the molecular structure of organic pollutants governs their oxidation mechanism and their fate in iron-based heterogeneous Fenton-like system and further broadens our knowledge on the activation mechanism of PMS by iron-based heterogeneous catalyst.
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Affiliation(s)
- Yongfang Rao
- Department of Environmental Science and Engineering, Xi' an Jiaotong University, Xi'an 710049, China.
| | - Chuanyi Zhou
- Department of Environmental Science and Engineering, Xi' an Jiaotong University, Xi'an 710049, China
| | - Puqiu Wu
- CAS Key Laboratory of Mineralogy and Metallogeny/Guangdong Provincial Key Laboratory of Mineral Physics and Materials, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, PR China
| | - Jiahui Fan
- Department of Environmental Science and Engineering, Xi' an Jiaotong University, Xi'an 710049, China
| | - Yuanyuan Zhang
- Department of Environmental Science and Engineering, Xi' an Jiaotong University, Xi'an 710049, China
| | - Honghui Yang
- Department of Applied Chemistry, Xi' an Jiaotong University, Xi'an 710049, China
| | - Shengyan Pu
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology), 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China.
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Sahoo A, Bhattacharya D, Das M, Mandal P. Shape dependent multiferroic behavior in Bi 2Fe 4O 9nanoparticles. NANOTECHNOLOGY 2022; 33:305702. [PMID: 35413693 DOI: 10.1088/1361-6528/ac667d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 04/12/2022] [Indexed: 06/14/2023]
Abstract
Ferroelectric and magnetic properties are investigated for Bi2Fe4O9nanoparticles with different shapes (cuboid and sphere-like) synthesized by hydrothermal and sol-gel method. The magnetic study reveals that coercivity, Neel temperature and remanent magnetization strongly depend on shape of the particle. The nanoparticle with sphere-like shape exhibits magnetization curve of antiferromagnetic (AFM) ordering with ferromagnetic (FM) component. As the particle shape changes from sphere-like to cuboid, the AFM component is dominating over the ferromagnetic component. A small exchange bias is also observed at low temperature in both the sphere-like and cuboid nanoparticle. The coercivity, remanent magnetization and Neel temperature of sphere-like nanoparticle is greater than cuboid nanoparticle. Ferroelectric measurement shows the remanent polarization of cuboid is greater than sphere-like nanoparticle but the coercivity is almost same. This Bi2Fe4O9nanoparticle shows a small change in polarization under magnetic field. The polarization value decreases with magnetic field increases. The magnetoelectric coupling-measured by change of remanent polarization under magnetic field are found to be greater in Bi2Fe4O9sphere-like nanoparticles. These shape dependent magnetic and ferroelectric properties are coming because of shape anisotropy.
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Affiliation(s)
- Aditi Sahoo
- CSIR-Central Glass & Ceramic Research Institute, Kolkata 700032, India
| | | | - Moumita Das
- Saha Institute of Nuclear Physics, Kolkata 700064, India
| | - Prabhat Mandal
- Saha Institute of Nuclear Physics, Kolkata 700064, India
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Ma M, Chen Y, Liu Y, Jiang J, Jiao Z, Ma Y. Highly efficient photocatalytic organic dyes degradation based on 1D magnetic Bi
2
Fe
4
O
9
/C@AgBr composite. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Mingliang Ma
- School of Civil Engineering Qingdao University of Technology Qingdao P.R. China
| | - Yan Chen
- School of Civil Engineering Qingdao University of Technology Qingdao P.R. China
| | - Yanyan Liu
- School of Civil Engineering Qingdao University of Technology Qingdao P.R. China
| | - Jiabin Jiang
- School of Civil Engineering Qingdao University of Technology Qingdao P.R. China
| | - Zhengguo Jiao
- School of Civil Engineering Qingdao University of Technology Qingdao P.R. China
| | - Yong Ma
- School of Material Science and Engineering Shandong University of Science and Technology Qingdao P.R. China
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Di L, Yang H, Xian T, Chen X. Construction of Z-Scheme g-C₃N₄/CNT/Bi₂Fe₄O₉ Composites with Improved Simulated-Sunlight Photocatalytic Activity for the Dye Degradation. MICROMACHINES 2018; 9:E613. [PMID: 30469498 PMCID: PMC6315851 DOI: 10.3390/mi9120613] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 11/10/2018] [Accepted: 11/20/2018] [Indexed: 12/20/2022]
Abstract
In this work, ternary all-solid-state Z-scheme g-C₃N₄/carbon nanotubes/Bi₂Fe₄O₉ (g-C₃N₄/CNT/BFO) composites with enhanced photocatalytic activity were prepared by a hydrothermal method. The morphology observation shows that ternary heterojunctions are formed in the g-C₃N₄/CNT/BFO composites. The photocatalytic activity of the samples for the degradation of acid orange 7 was investigated under simulated sunlight irradiation. It was found that the ternary composites exhibit remarkable enhanced photocatalytic activity when compared with bare BFO and g-C₃N₄/BFO composites. The effect of the CNT content on the photocatalytic performance of the ternary composites was investigated. The photocatalytic mechanism of g-C₃N₄/CNT/BFO was proposed according to the photoelectrochemical measurement, photoluminescence, active species trapping experiment and energy-band potential analysis. The results reveal that the introduction of CNT as an excellent solid electron mediator into the ternary composites can effectively accelerate the electron migration between BFO and g-C₃N₄. This charge transfer process results in highly-efficient separation of photogenerated charges, thus leading to greatly enhanced photocatalytic activity of g-C₃N₄/CNT/BFO composites. Furthermore, the g-C₃N₄/CNT/BFO composites also exhibit highly-efficient photo-Fenton-like catalysis property.
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Affiliation(s)
- Lijing Di
- State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China.
- College of Physics and Electronic Information Engineering, Qinghai Normal University, Xining 810008, China.
| | - Hua Yang
- State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China.
| | - Tao Xian
- College of Physics and Electronic Information Engineering, Qinghai Normal University, Xining 810008, China.
| | - Xiujuan Chen
- State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China.
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Wang K, Xu X, Lu L, Wang H, Li Y, Wu Y, Miao J, Zhang JZ, Jiang Y. Enhanced and Facet-specific Electrocatalytic Properties of Ag/Bi 2Fe 4O 9 Composite Nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2018; 10:12698-12707. [PMID: 29565113 DOI: 10.1021/acsami.8b01148] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Ag/Bi2Fe4O9 nanoparticles (BFO NPs) have been synthesized using a two-step approach involving glycine combustion and visible light irradiation. Their structures were characterized in detail using X-ray diffraction, transmission electron microscope, scanning electron microscopy, and scanning transmission electron microscopy techniques. Their electrocatalytic properties were studied through enzymatic glucose detection with an amperometric biosensor. The Ag deposited on selective crystal facets of BFO NPs significantly enhanced their electrocatalytic activity. To gain insights into the origin of the enhanced electrocatalytic activities, we have carried out studies of Ag+ reduction and Mn2+ oxidation reaction at the {200} and {001} facets, respectively. The results suggest effective charge separation on the BFO NP surfaces, which is likely responsible for the enhanced electrocatalytic properties. Furthermore, enhanced ferromagnetism was observed after the Ag deposition on BFO NPs, which may be related to the improved electrocatalytic properties through spin-dependent charge transport. The facet-specific electrocatalytic properties are highly interesting and desired for chemical reactions. This study demonstrates that Ag/BFO NPs are potentially useful for electrocatalytic applications including biosensing and chemical synthesis with high product selectivity.
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Affiliation(s)
| | | | | | - Haicheng Wang
- Materials Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States
| | - Yan Li
- Department of Chemistry & Biochemistry , University of California , Santa Cruz , California 95064 , United States
| | | | | | - Jin Zhong Zhang
- Department of Chemistry & Biochemistry , University of California , Santa Cruz , California 95064 , United States
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Lin Y, Dong J, Dai J, Wang J, Yang H, Zong H. Facile Synthesis of Flowerlike LiFe5O8 Microspheres for Electrochemical Supercapacitors. Inorg Chem 2017; 56:14960-14967. [DOI: 10.1021/acs.inorgchem.7b02257] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ying Lin
- School
of Materials Science and Engineering and ‡College of Chemistry and Chemical
Engineering, Shaanxi University of Science and Technology, 710021 Xi’an, China
| | - Jingjing Dong
- School
of Materials Science and Engineering and ‡College of Chemistry and Chemical
Engineering, Shaanxi University of Science and Technology, 710021 Xi’an, China
| | - Jingjing Dai
- School
of Materials Science and Engineering and ‡College of Chemistry and Chemical
Engineering, Shaanxi University of Science and Technology, 710021 Xi’an, China
| | - Jingping Wang
- School
of Materials Science and Engineering and ‡College of Chemistry and Chemical
Engineering, Shaanxi University of Science and Technology, 710021 Xi’an, China
| | - Haibo Yang
- School
of Materials Science and Engineering and ‡College of Chemistry and Chemical
Engineering, Shaanxi University of Science and Technology, 710021 Xi’an, China
| | - Hanwen Zong
- School
of Materials Science and Engineering and ‡College of Chemistry and Chemical
Engineering, Shaanxi University of Science and Technology, 710021 Xi’an, China
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