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Zhao Y, Yang H, Hao H, Zhu F, Zhang G, Bi J, Yan S, Hou H. Construction of an S-Scheme Ag 2MoO 4/ZnFe 2O 4 Nanofiber Heterojunction for Enhanced Photoelectrocatalytic Activity under Visible Light Irradiation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:13437-13447. [PMID: 36288509 DOI: 10.1021/acs.langmuir.2c01881] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The removal of organic dyes and pathogenic bacteria from contaminated water remains a significant challenge. In the present study, S-type heterojunction Ag2MoO4/ZnFe2O4 (AMO/ZFO) composite nanofibers were synthesized by electrospinning and co-precipitation and fabricated into photoanodes. It is found that the constructed S-type heterojunction of AMO/ZFO composites effectively inhibits the recombination of photogenerated carriers, in addition to the benefits of more exposed active sites and a greater specific surface area. When several properties are improved, AMO/ZFO composites exhibit excellent photoelectrocatalytic performance. The results demonstrate that under visible light irradiation, the photoelectrocatalytic degradation rate of AMO/ZFO-3 to methylene blue reached 76.2% within 50 min, and the killing rate of Salmonella was 83.6% within 80 min. The enhanced photoelectrocatalytic activity was due to the synergy of both electrochemical and photocatalytic effects. More importantly, after four testing cycles, AMO/ZFO-3 still has a better ability to kill pathogenic bacteria and degrade organic dyes due to its high stability. This work provides a feasible method for oxidizing organic dyes and pathogenic bacteria.
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Affiliation(s)
- Yirui Zhao
- Liaoning Key Lab for Aquatic Processing Quality and Safety, Dalian Polytechnic University, Dalian116034, China
| | - Hang Yang
- Liaoning Key Lab for Aquatic Processing Quality and Safety, Dalian Polytechnic University, Dalian116034, China
- Department of Inorganic Nonmetallic Materials Engineering, Dalian Polytechnic University, Dalian116034, China
| | - Hongshun Hao
- Liaoning Key Lab for Aquatic Processing Quality and Safety, Dalian Polytechnic University, Dalian116034, China
- Department of Inorganic Nonmetallic Materials Engineering, Dalian Polytechnic University, Dalian116034, China
| | - Fuxiao Zhu
- Liaoning Key Lab for Aquatic Processing Quality and Safety, Dalian Polytechnic University, Dalian116034, China
- Department of Inorganic Nonmetallic Materials Engineering, Dalian Polytechnic University, Dalian116034, China
| | - Gongliang Zhang
- Liaoning Key Lab for Aquatic Processing Quality and Safety, Dalian Polytechnic University, Dalian116034, China
| | - Jingran Bi
- Liaoning Key Lab for Aquatic Processing Quality and Safety, Dalian Polytechnic University, Dalian116034, China
| | - Shuang Yan
- Department of Inorganic Nonmetallic Materials Engineering, Dalian Polytechnic University, Dalian116034, China
| | - Hongman Hou
- Liaoning Key Lab for Aquatic Processing Quality and Safety, Dalian Polytechnic University, Dalian116034, China
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Zhu Y, Zhao W, Jing B, Zhou J, Cai B, Li D, Ao Z. Density functional theory calculations on 2H-MoS2 monolayer for HCHO degradation: Piezoelectric-photocatalytic synergy. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.107816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Mohseni M, S A AR, H Shirazi F, Nemati NH. Preparation and characterization of self-electrical stimuli conductive gellan based nano scaffold for nerve regeneration containing chopped short spun nanofibers of PVDF/MCM41 and polyaniline/graphene nanoparticles: Physical, mechanical and morphological studies. Int J Biol Macromol 2020; 167:881-893. [PMID: 33186646 DOI: 10.1016/j.ijbiomac.2020.11.045] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Revised: 11/05/2020] [Accepted: 11/07/2020] [Indexed: 01/20/2023]
Abstract
Conductive self -electrical stimuli bioactive scaffolds could be used the potential for peripheral nerve regeneration with the maximum efficiency. To produce such conductive self-electrical stimuli bioactive scaffolds, chopped spun piezoelectric nanofibers of polyvinylidene fluoride/mesoporous silica nanoparticle (PVDF/MCM41) are prepared and incorporated in gellan/polyaniline/graphene (gellan/PAG) nanocomposites which have been previously prepared by incorporation of polyaniline/graphene (PAG) nanoparticles in gellan gel at 80 °C. Highly conductive binary doped polyaniline/graphene nanoparticles are prepared by chemical oxidative polymerization of aniline monomer using in-suite precipitation polymerization method in presence of graphene nanoparticles and sodium dodecyl sulfate. All intermediate and final products including spun PVDF/MCM41 nanofibers, PAG nanoparticles, and gellan-gelatin gel scaffolds containing PVDF/MCM41 nano spun fibers and PAG nanoparticles are characterized using different analysis methods. Chemical and structural analyses of PAG nanoparticles and PVDF/MCM41 nanofibers have been done using FTIR and XRD methods. The morphological structure of different samples is investigated using SEM. Morphological investigation and DLS results confirm fabrication of MCM41 nanoparticle with a completely spherical shape and the average size of 50 nm of which have been dispersed in electrospun PVDF nanofibers very well. Also, the preparation of PAG nanoparticle with high conductivity is verified with morphological and conductivity tests. MTT easy and biocompatibility test results indicate potential applicability of the prepared conductive self -stimuli nano-scaffold for nerve regeneration applications.
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Affiliation(s)
- Mojdeh Mohseni
- Department of Biomedical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Ahmad Ramazani S A
- Chemical & Petroleum Engineering Department, Sharif University of Technology, Tehran, Iran.
| | - Farshad H Shirazi
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Shaheed Beheshti University of Medical Sciences, Tehran, Iran
| | - Nahid Hassanzadeh Nemati
- Department of Biomedical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
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