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Ye J, Zhang T, Hao Y, Tan W, Su H, Wang Y, Feng Q, Xu L. Effects of Co 3O 4 modified with MoS 2 on microbial fuel cells performance. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 367:121966. [PMID: 39068783 DOI: 10.1016/j.jenvman.2024.121966] [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: 03/28/2024] [Revised: 06/03/2024] [Accepted: 07/17/2024] [Indexed: 07/30/2024]
Abstract
In this study, Co3O4@MoS2 is prepared as anodic catalytic material for microbial fuel cells (MFCs). As the mass fraction of MoS2 is 20%, the best performance of Co3O4@MoS2 composite catalytic material is achieved, and the addition of MoS2 enhances both the electrical conductivity and catalytic performance of the composite catalyst. Through the structural characterization of Co3O4@MoS2 composite catalytic material, nanorod-like Co3O4 and lamellar MoS2 interweaved and stacked each other, and the agglomeration of Co3O4 is weakened. Among the four groups of single-chamber MFCs constructed, the Co3O4@MoS2-MFC shows the best power production performance with a maximum stable output voltage of to 539 mV and a maximum power density of up to 2221 mW/m2. Additionally, the ammonia nitrogen removal rate of the MFCs loaded with catalysts is enhanced by about 10% compared with the blank carbon cloth MFC. Overall, the findings suggest that Co3O4@MoS2 composite catalysts can significantly improve the performance of MFCs, making them more effective for both energy production and wastewater treatment.
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Affiliation(s)
- Jingyi Ye
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, China.
| | - Teng Zhang
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, China.
| | - Yu Hao
- Science and Technology Department, Chongqing Vocational Institute of Engineering, Chongqing, 402260, China.
| | - Wenwen Tan
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, China.
| | - Huaren Su
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, China.
| | - Yong Wang
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, China.
| | - Qi Feng
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, China.
| | - Longjun Xu
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, 400044, China.
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Cai W, Liu Y, Yao R, Yuan W, Ning H, Huang Y, Jin S, Fang X, Guo R, Peng J. Optimization of Pulsed Laser Energy Density for the Preparation of MoS 2 Film and Its Device by Pulsed Laser Deposition. MICROMACHINES 2024; 15:945. [PMID: 39203596 PMCID: PMC11356575 DOI: 10.3390/mi15080945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2024] [Revised: 07/22/2024] [Accepted: 07/23/2024] [Indexed: 09/03/2024]
Abstract
This article aims to explore the most optimal pulsed laser energy density when using the pulsed laser deposition (PLD) process to prepare the MoS2 films. We gradually increased the pulsed laser energy density from 70 mJ·cm-2 to 110 mJ·cm-2 and finally determined that 100 mJ·cm-2 was the best-pulsed laser energy density for MoS2 films by PLD. The surface morphology and crystallization of the MoS2 films prepared under this condition are the best. The films consist of a high-crystallized 2H-MoS2 phase with strong (002) preferential orientation, and their direct optical band gap (Eg) is 1.614 eV. At the same time, the Si/MoS2 heterojunction prepared under the optimal pulsed laser energy density shows an opening voltage of 0.61 V and a rectification ratio of 457.0.
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Affiliation(s)
- Wei Cai
- Ji Hua Laboratory, Foshan 528000, China;
| | - Yuxiang Liu
- Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, State Key Laboratory of Luminescent Materials and Devices, School of Materials Sciences and Engineering, South China University of Technology, Guangzhou 510640, China; (Y.L.); (R.Y.); (W.Y.); (Y.H.); (S.J.); (X.F.); (J.P.)
| | - Rihui Yao
- Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, State Key Laboratory of Luminescent Materials and Devices, School of Materials Sciences and Engineering, South China University of Technology, Guangzhou 510640, China; (Y.L.); (R.Y.); (W.Y.); (Y.H.); (S.J.); (X.F.); (J.P.)
| | - Weijian Yuan
- Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, State Key Laboratory of Luminescent Materials and Devices, School of Materials Sciences and Engineering, South China University of Technology, Guangzhou 510640, China; (Y.L.); (R.Y.); (W.Y.); (Y.H.); (S.J.); (X.F.); (J.P.)
| | - Honglong Ning
- Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, State Key Laboratory of Luminescent Materials and Devices, School of Materials Sciences and Engineering, South China University of Technology, Guangzhou 510640, China; (Y.L.); (R.Y.); (W.Y.); (Y.H.); (S.J.); (X.F.); (J.P.)
| | - Yucheng Huang
- Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, State Key Laboratory of Luminescent Materials and Devices, School of Materials Sciences and Engineering, South China University of Technology, Guangzhou 510640, China; (Y.L.); (R.Y.); (W.Y.); (Y.H.); (S.J.); (X.F.); (J.P.)
| | - Shaojie Jin
- Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, State Key Laboratory of Luminescent Materials and Devices, School of Materials Sciences and Engineering, South China University of Technology, Guangzhou 510640, China; (Y.L.); (R.Y.); (W.Y.); (Y.H.); (S.J.); (X.F.); (J.P.)
| | - Xuecong Fang
- Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, State Key Laboratory of Luminescent Materials and Devices, School of Materials Sciences and Engineering, South China University of Technology, Guangzhou 510640, China; (Y.L.); (R.Y.); (W.Y.); (Y.H.); (S.J.); (X.F.); (J.P.)
| | - Ruhai Guo
- GDJH Advanced Display Equipment Ltd., Foshan 528000, China
| | - Junbiao Peng
- Guangdong Basic Research Center of Excellence for Energy & Information Polymer Materials, State Key Laboratory of Luminescent Materials and Devices, School of Materials Sciences and Engineering, South China University of Technology, Guangzhou 510640, China; (Y.L.); (R.Y.); (W.Y.); (Y.H.); (S.J.); (X.F.); (J.P.)
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Xu Y, Feng H, Dong C, Yang Y, Zhou M, Wei Y, Guo H, Wei Y, Su J, Ben Y, Zhang X. Designed fabrication of MoS 2 hollow structures with different geometries and the comparative investigation toward capacitive properties. Phys Chem Chem Phys 2024; 26:1156-1165. [PMID: 38099437 DOI: 10.1039/d3cp05196j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2024]
Abstract
Hollow MoS2 cubes and spheres were synthesized by a one-step hydrothermal method with the hard template method. The structure and morphology were characterized, and their electrochemical properties were studied. It is concluded that the specific capacitance of the hollow MoS2 cubes (335.7 F g-1) is higher than that of the hollow MoS2 spheres (256.1 F g-1). The symmetrical supercapacitors were assembled, and the results indicate that the specific capacitance of the device composed of hollow MoS2 spheres (32.9 F g-1) is slightly lower than that of the hollow MoS2 cube (37.4 F g-1) device. Furthermore, the symmetrical supercapacitor (MoS2-cube//MoS2-cube) provides a maximum energy density of 4.93 W h kg-1, which is greater than that of the symmetrical capacitor (MoS2-sphere//MoS2-sphere, 3.65 W h kg-1). This may indicate that hollow molybdenum disulfide cubes with substructures have more efficient charge transfer capabilities and better capacitance characteristics than hollow spheres. After 8000 cycles, the coulombic efficiency of the two symmetrical capacitors is close to 100%. The capacity retention of the MoS2 sphere device (95.2%) is slightly higher than that of the MoS2 cube device (90.1%). These results show that the pore structure, specific surface, and active site of MoS2 with different hollow structures have a greater impact on its electrochemical properties.
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Affiliation(s)
- Yuandong Xu
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China.
| | - Haoyang Feng
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China.
| | - Chaoyang Dong
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China.
| | - Yuqing Yang
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China.
| | - Meng Zhou
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China.
| | - Yajun Wei
- School of Chemical Engineering, Northwest Minzu University, Lanzhou 730001, China
| | - Hui Guo
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China.
| | - Yaqing Wei
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China.
| | - Jishan Su
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China.
| | - Yingying Ben
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China.
| | - Xia Zhang
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China.
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Safartoobi A, Mazloom J, Ghodsi FE. Novel electrospun bead-like Ag 2MoO 4 nanofibers coated on Ni foam for visible light-driven heterogeneous photocatalysis and high-performance supercapacitor electrodes. Phys Chem Chem Phys 2023; 26:430-444. [PMID: 38078493 DOI: 10.1039/d3cp04751b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2023]
Abstract
Novel Ag2MoO4 nanocomposite fibers were designed to enhance the photocatalytic response and supercapacitor performance of MoO3 grown via the sol-gel electrospinning technique. The Ag2MoO4 nanocomposite fibers exhibit a high specific surface area of 49.3 m2 g-1 comprising nanobeads that aggregate in the fibrous structure. The photodegradation efficiency of Ag2MoO4 was evaluated as 62% under visible light irradiation which improved to 71% with heterogeneous photocatalysis. The Ag2MoO4@Ni foam exhibited a low Rct of 19.6 Ω, and an enhanced specific capacitance of 1445 F g-1 was obtained at 1 A g-1, with 93% of its initial capacitance remaining after 5000 cycles. In addition, the Ag2MoO4//activated carbon asymmetric supercapacitor possesses an excellent energy density of 76.6 W h kg-1 at 743.2 W kg-1 and a noteworthy cycling durability of 91% after 5000 cycles. Our findings demonstrate that the electrospun Ag2MoO4@Ni foam is an important and inexpensive electrode material for supercapacitor applications and visible light-driven heterogeneous photocatalysis, drawing on the synergic effects of Ag and Mo to exhibit much better performance.
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Affiliation(s)
- Amirreza Safartoobi
- Department of Physics, Faculty of Science, University of Guilan, Namjoo Avenue, P.O. Box 413351914, Rasht, Iran.
| | - Jamal Mazloom
- Department of Physics, Faculty of Science, University of Guilan, Namjoo Avenue, P.O. Box 413351914, Rasht, Iran.
| | - Farhad Esmaeili Ghodsi
- Department of Physics, Faculty of Science, University of Guilan, Namjoo Avenue, P.O. Box 413351914, Rasht, Iran.
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