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Mbokazi SP, Matthews T, Zheng H, Chabalala MP, Zikhali M, Mugadza K, Gwebu S, Mekuto L, Maxakato NW. Elucidating the effects of nitrogen and phosphorus co-doped carbon on complex spinel NiFe 2O 4 towards oxygen reduction reaction in alkaline media. Heliyon 2024; 10:e35483. [PMID: 39166028 PMCID: PMC11334865 DOI: 10.1016/j.heliyon.2024.e35483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Revised: 07/18/2024] [Accepted: 07/30/2024] [Indexed: 08/22/2024] Open
Abstract
The study presents for the first time complex spinel NiFe2O4 nanoparticles supported on nitrogen and phosphorus co-doped carbon nanosheets (NPCNS) prepared using sol gel and the carbonization of graphitic carbon nitride with lecithin as a highly active and durable electrocatalyst for oxygen reduction reaction. The physicochemical properties of complex spinel NiFe2O4 on NPCNS and subsequent nanomaterials were investigated using techniques such as X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and transmission electron microscopy. The electrochemical activity of the electrocatalysts was evaluated using hydrodynamic linear sweep voltammetry, cyclic voltammetry, electrochemical impedance spectroscopy, and chronoamperometry. The electrocatalytic performance of the NiFe2O4/NPCNS nanohybrid electrocatalyst is dominated by the 4e- transfer mechanism, with an onset potential of 0.92 V vs. RHE, which is closer to that of the Pt/C, and a current density of 7.81 mA/cm2 that far exceeds that of the Pt/C. The nanohybrid demonstrated the best stability after 14 400 s, outstanding durability after 521 cycles, and the best ability to oxidize methanol and remove CO from its active sites during CO tolerance studies. This improved catalytic activity can be attributed to small nanoparticle sizes of the unique complex spinel nickel ferrite structure, N-Fe/Ni coordination of nanocomposite, high dispersion, substantial ECSA of 47.03 mF/cm2, and synergy caused by strong metal-support and electronic coupling interactions.
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Affiliation(s)
| | - Thabo Matthews
- Department of Chemical Sciences, University of Johannesburg, Doornfontein, 2028, South Africa
| | - Haitao Zheng
- Energy Centre, Council for Scientific and Industrial Research (CSIR), Pretoria, 0001, South Africa
| | | | - Memory Zikhali
- Department of Chemical Sciences, University of Johannesburg, Doornfontein, 2028, South Africa
| | - Kudzai Mugadza
- Department of Chemical Sciences, University of Johannesburg, Doornfontein, 2028, South Africa
| | - Sandile Gwebu
- Department of Chemical Sciences, University of Johannesburg, Doornfontein, 2028, South Africa
| | - Lukhanyo Mekuto
- Department of Chemical Engineering, School of Mining, Metallurgy, and Chemical Engineering, Faculty of Engineering and the Built Environment, University of Johannesburg, Doornfontein, 2006, South Africa
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Duan Y, Liu Y, Wang Y, Wang H, Yin W, Xu G. Recyclable Fe/S co-doped nanocarbon derived from metal-organic framework as a peroxymonosulfate activator for efficient removal of 2,4-dichlorophenol. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:6906-6918. [PMID: 36018412 DOI: 10.1007/s11356-022-22430-0] [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: 05/09/2022] [Accepted: 08/03/2022] [Indexed: 06/15/2023]
Abstract
In this study, a recyclable Fe/S co-doped nanocarbon (Fe/S-NC) was successfully prepared by the pyrolysis of ZIF-8 confined with Fe(II) and added S. Characterization showed that a highly graphitized carbon-based material co-doped with sulfur and iron was successfully prepared. This Fe/S-NC can efficiently activate PMS to remove organic pollutants in water. The effect of different synthesis conditions on the degradation efficiency of 2,4-DCP was studied by orthogonal experiments. The optimized Fe/S-NC/PMS system exhibited excellent catalytic performance and could degrade more than 99.7% of 2,4-DCP within 30 min. Even after 5 cycles, the degradation efficiency could still be maintained above 96.3%, which proved that the catalytic system had good cycle performance. In addition, the effect of pH on catalytic performance showed that the degradation rate of 2,4-DCP exceeds 96.7% in the pH range of groundwater (pH = 5-9). We had confirmed that the free radicals that caused 2,4-DCP degradation were SO4·-, ·OH, O2·-, and 1O2, which played important roles in degrading organic pollutants. These research results show that the Fe/S-NC/PMS system can be used as an efficient, stable, and environmentally friendly system to treat organic pollutants in groundwater.
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Affiliation(s)
- Yu Duan
- School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, China
| | - Yujie Liu
- School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, China
| | - Yun Wang
- Shanghai Tenth People's Hospital, 301 Yanchang Road, Shanghai, 200072, China
| | - Hongyong Wang
- Shanghai Institute of Applied Radiation, Shanghai University, 20 Chengzhong Road, Shanghai, 200444, China
| | - Wentao Yin
- School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, China
| | - Gang Xu
- School of Environmental and Chemical Engineering, Shanghai University, 99 Shangda Road, Shanghai, 200444, China.
- Key Laboratory of Organic Compound Pollution Control Engineering, Ministry of Education, Shanghai, 200444, People's Republic of China.
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Luo S, Liu R, Zhang X, Chen R, Yan M, Huang K, Sun J, Wang R, Wang J. Mechanism investigation for ultra-efficient photocatalytic water disinfection based on rational design of indirect Z-scheme heterojunction black phosphorus QDs/Cu 2O nanoparticles. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127281. [PMID: 34583158 DOI: 10.1016/j.jhazmat.2021.127281] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 08/31/2021] [Accepted: 09/16/2021] [Indexed: 06/13/2023]
Abstract
Photocatalysis has been regarded as a promising inactivation technology targeting to reduce drug-resistant bacteria contamination, but developing efficient photocatalysts with broad visible light harvesting capability is still a challenge. Here we report a MOFs-derived BPQDs/Cu2O/N-doped hollow porous carbon (BP/CNC) with indirect Z-scheme heterojunctions (BPQDs/Cu2O), which can inactivate 99.99999% Methicillin-resistant Staphylococcus aureus (MRSA) at a concentration of only 10 mg/L. Combining photoelectrochemical techniques and electrochemical measurements, the efficient inactivation process was attributed to the synergistic effect of enhanced light utilization and effective suppression of photogenerated carrier recombination. The mechanism of gradually damaged cell membrane for MRSA was studied by employing scanning electron microscopy (SEM), fluorescence staining and coagulase titer test to further decipher the changes in bacterial cells. We propose that reactive oxygen species (ROS) destroys the cell wall membrane and causes the leakage of cell contents, eventually leading to death. In addition, a series of in vitro and in vivo toxicity tests were conducted to evaluate the biocompatibility of the antibacterial system and its potential use in practice. This strategy of BPQDs/Cu2O indirect heterojunction fabrication can spatially inhibit the recombination of photogenerated carriers, expands the light absorption range, providing a feasible method for disinfecting microbial contaminated water.
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Affiliation(s)
- Shijia Luo
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100 Shaanxi, PR China
| | - Ruixi Liu
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100 Shaanxi, PR China
| | - Xixi Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100 Shaanxi, PR China
| | - Rui Chen
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100 Shaanxi, PR China
| | - Mingming Yan
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100 Shaanxi, PR China
| | - Kerang Huang
- Life Science Research Core Services, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Jing Sun
- Qinghai Key Laboratory of Qinghai-Tibet Plateau Biological Resources, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Qinghai 810008, PR China
| | - Rong Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100 Shaanxi, PR China.
| | - Jianlong Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, 712100 Shaanxi, PR China.
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Chai D, Min X, Harada T, Nakanishi S, Zhang X. Covalent triazine framework anchored with atomically dispersed iron as an efficient catalyst for advanced oxygen reduction. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Liang S, Wang ZD, Guo ZF, Chen XY, Li SQ, Wang BD, Lu GL, Sun H, Liu ZN, Zang HY. N-Doped porous biocarbon materials derived from soya peptone as efficient electrocatalysts for the ORR. NEW J CHEM 2021. [DOI: 10.1039/d0nj06080a] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A non-noble metal oxygen reduction catalyst was designed and fabricated via a facile carbonization of soya peptone and ZnCl2.
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Dong Z, Zhang Z, Zhou R, Dong Y, Wei Y, Zheng Z, Wang Y, Dai Y, Cao X, Liu Y. Facile construction of Fe, N and P co-doped carbon spheres by carbothermal strategy for the adsorption and reduction of U(vi). RSC Adv 2020; 10:34859-34868. [PMID: 35514430 PMCID: PMC9056867 DOI: 10.1039/d0ra06252a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Accepted: 08/17/2020] [Indexed: 11/28/2022] Open
Abstract
In this work, nitrogen and phosphorus co-doped magnetic carbon spheres encapsulating well-dispersed active Fe nanocrystals (Fe/P-CN) were fabricated via a simple copolymer pyrolysis strategy. Benefiting from heteroatoms doping, Fe/P-CN could primarily adsorb soluble U(vi) ions through abundant functional groups, and subsequently, the adsorbed U(vi) could be reduced to insoluble U(iv) by Fe nanocrystals. Fe/P-CN pyrolyzed at 800 °C (Fe/P-CN-800) exhibited excellent U(vi) removal capacity of 306.76 mg g−1, surpassing nitrogen and phosphorus co-doped carbon spheres and nano zero-valent iron. In addition, the magnetic separation and thermal reactivation properties endow Fe/P-CN-800 with excellent reusability. This research, especially, provides a promising synergistic adsorption and reduction strategy to effectively remove U(vi) using heteroatom-doped composites. The constructed novel magnetic carbon sphere co-doped by N, P, Fe (Fe/P-CN) exhibits high U(vi) removal efficiency, excellent magnetic separation and reusability, evidencing the potential practical applications in environmental remediation.![]()
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Affiliation(s)
- Zhimin Dong
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology Nanchang Jiangxi 330013 P. R. China
| | - Zhibin Zhang
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology Nanchang Jiangxi 330013 P. R. China
| | - Runze Zhou
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology Nanchang Jiangxi 330013 P. R. China
| | - Yayu Dong
- 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 P. R. China
| | - Yuanyuan Wei
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology Nanchang Jiangxi 330013 P. R. China
| | - Zhijian Zheng
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology Nanchang Jiangxi 330013 P. R. China
| | - Youqun Wang
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology Nanchang Jiangxi 330013 P. R. China
| | - Ying Dai
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology Nanchang Jiangxi 330013 P. R. China
| | - Xiaohong Cao
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology Nanchang Jiangxi 330013 P. R. China
| | - Yunhai Liu
- State Key Laboratory of Nuclear Resources and Environment, East China University of Technology Nanchang Jiangxi 330013 P. R. China
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Ren Z, Wang Y, Fei P, Liu X, Jing W, Wang W. An Economic Magnetic Adsorbent for Acid Blue 80 and Methylene Blue Removal. ChemistrySelect 2019. [DOI: 10.1002/slct.201900746] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Zongli Ren
- School of Chemical and Biological EngineeringLanzhou Jiaotong University Lanzhou PR China 730070
| | - Yahui Wang
- School of Chemical and Biological EngineeringLanzhou Jiaotong University Lanzhou PR China 730070
| | - Peng Fei
- School of Chemistry and Environmental EngineeringShanxi Datong University Datong PR China 037009
| | - Xianyi Liu
- School of Chemical and Biological EngineeringLanzhou Jiaotong University Lanzhou PR China 730070
| | - Wangli Jing
- School of Chemical and Biological EngineeringLanzhou Jiaotong University Lanzhou PR China 730070
| | - Wei Wang
- School of Chemical and Biological EngineeringLanzhou Jiaotong University Lanzhou PR China 730070
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Zhang P, Chen C, Zhang X, Jiang Z, Huang J, Chen J. Fe and S co-doped N-enriched hierarchical porous carbon polyhedron as efficient non-noble-metal electrocatalyst toward oxygen reduction reaction in both alkaline and acidic medium. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2018.12.119] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Geng J, Zhang HJ, Yao S, Cai C, Ma ZF, Wang J, Wei H, Yang J. High-sulfur coal-derived nitrogen, sulfur dual-doped carbon as an economical metal-free electrocatalyst for oxygen reduction reaction. RSC Adv 2019; 9:24770-24776. [PMID: 35528676 PMCID: PMC9069900 DOI: 10.1039/c9ra03720a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Accepted: 06/26/2019] [Indexed: 11/22/2022] Open
Abstract
The search for an economical electrocatalyst for oxygen reduction reaction (ORR) is a worldwide issue for fuel cells and metal–air batteries. Herein, we used cheap and available high-sulfur inferior coal as the single precursor to synthesize an N, S dual-doped carbon (NSC) metal-free electrocatalyst for the ORR. The N, S dual-doped carbon (NSC), prepared at 800 °C (NSC800), possessed a large specific surface area of 942 m2 g−1, with an amorphous carbon structure and more defects than the others. Furthermore, it contains 1.06 at% N and 2.24 at% S, where N is resolved into pyridinic-N, pyrrolic-N, and graphitic-N. For the electrochemical behavior, NSC800 displayed a good ORR electrocatalytic activity, with the ORR peak potential at −0.245 V (vs. SCE) and half-wave potential (E1/2) at −0.28 V (vs. SCE) in an alkaline solution. This study not only gives an original and facile method to prepare an economical ORR electrocatalyst but also provides a novel clean-use of high-sulfur inferior coal. The search for an economical electrocatalyst for oxygen reduction reaction (ORR) is a worldwide issue for fuel cells and metal–air batteries.![]()
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Affiliation(s)
- Jing Geng
- School of Materials Science and Engineering
- The University of Shanghai for Science and Technology
- Shanghai
- China
| | - Hui-Juan Zhang
- School of Materials Science and Engineering
- The University of Shanghai for Science and Technology
- Shanghai
- China
| | - Sunwu Yao
- School of Materials Science and Engineering
- The University of Shanghai for Science and Technology
- Shanghai
- China
| | - Chunlei Cai
- School of Materials Science and Engineering
- The University of Shanghai for Science and Technology
- Shanghai
- China
| | - Zi-Feng Ma
- Department of Chemical Engineering
- Shanghai Jiaotong University
- Shanghai
- China
| | - Jiancheng Wang
- State Key Laboratory Breeding Base of Coal Science and Technology Co-founded by Shanxi Province and the Ministry of Science and Technology
- Taiyuan University of Technology
- China
| | - Haibing Wei
- Key Laboratory of Advanced Functional Materials and Devices of Anhui Province
- Hefei University of Technology
- Hefei
- China
| | - Junhe Yang
- School of Materials Science and Engineering
- The University of Shanghai for Science and Technology
- Shanghai
- China
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Liu S, Liu L, Chen X, Yang Z, Li M, Wang Y, Lv W, Zhu P, Zhao X, Wang G. On an Easy Way to Prepare Fe, S, N Tri-Doped Mesoporous Carbon Materials as Efficient Electrocatalysts for Oxygen Reduction Reaction. Electrocatalysis (N Y) 2018. [DOI: 10.1007/s12678-018-0496-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Sheng ZM, Hong CY, Li NN, Chen QZ, Jia RP, Zhang DY, Han S. Graphitic nanocages prepared with optimized nitrogen-doped structures by pyrolyzing selective precursors towards highly efficient oxygen reduction. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2017.12.080] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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