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Liu H, Qi L, Chen Z, Zhao S, Luan X, Yan J, Zheng Z, Bu F, Xue Y, Li Y. A Multi-Interface Structure of Graphdiyne/Cobalt Oxides for Chlorine Production. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2401347. [PMID: 38716685 DOI: 10.1002/smll.202401347] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 04/11/2024] [Indexed: 10/01/2024]
Abstract
A challenge facing the chlor-alkali process is the lack of electrocatalyst with high activity and selectivity for the efficient industrial production of chlorine. Herein the authors report a new electrocatalyst that can generate multi-interface structure by in situ growth of graphdiyne on the surface of cobalt oxides (GDY/Co3O4), which shows great potential in highly selective and efficient chlorine production. This result is due to the strong electron transfer and high density charge transport between GDY and Co3O4 and the interconversion of the mixed valence states of the Co atoms itself. These intrinsic characteristics efficiently enhance the conductivity of the catalyst, facilitate the reaction kinetics, and improve the overall catalytic selectivity and activity. Besides, the protective effect of the formed GDY layer is remarkable endowing the catalyst with excellent stability. The catalyst can selectively produce chlorine in low-concentration of NaCl aqueous solution at room temperature and pressure with the highest Faraday efficiency of 80.67% and an active chlorine yield rate of 184.40 mg h-1 cm-2, as well as superior long-term stability.
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Affiliation(s)
- Huimin Liu
- Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion, Science Center for Material Creation and Energy Conversion, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China
| | - Lu Qi
- Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion, Science Center for Material Creation and Energy Conversion, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China
| | - Zhaoyang Chen
- Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion, Science Center for Material Creation and Energy Conversion, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China
| | - Shuya Zhao
- Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion, Science Center for Material Creation and Energy Conversion, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China
| | - Xiaoyu Luan
- Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion, Science Center for Material Creation and Energy Conversion, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China
| | - Jiayu Yan
- Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion, Science Center for Material Creation and Energy Conversion, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China
| | - Zhiqiang Zheng
- Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion, Science Center for Material Creation and Energy Conversion, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China
| | - Fanle Bu
- Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion, Science Center for Material Creation and Energy Conversion, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China
| | - Yurui Xue
- Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion, Science Center for Material Creation and Energy Conversion, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China
| | - Yuliang Li
- Shandong Provincial Key Laboratory for Science of Material Creation and Energy Conversion, Science Center for Material Creation and Energy Conversion, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China
- CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
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Matos T, Pinto V, Sousa P, Martins M, Fernández E, Henriques R, Gonçalves LM. Design and In Situ Validation of Low-Cost and Easy to Apply Anti-Biofouling Techniques for Oceanographic Continuous Monitoring with Optical Instruments. SENSORS (BASEL, SWITZERLAND) 2023; 23:605. [PMID: 36679400 PMCID: PMC9867425 DOI: 10.3390/s23020605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Revised: 12/31/2022] [Accepted: 01/01/2023] [Indexed: 06/17/2023]
Abstract
Biofouling is the major factor that limits long-term monitoring studies with automated optical instruments. Protection of the sensing areas, surfaces, and structural housing of the sensors must be considered to deliver reliable data without the need for cleaning or maintenance. In this work, we present the design and field validation of different techniques for biofouling protection based on different housing materials, biocides, and transparent coatings. Six optical turbidity probes were built using polylactic acid (PLA), acrylonitrile butadiene styrene (ABS), PLA with copper filament, ABS coated with PDMS, ABS coated with epoxy and ABS assembled with a system for in situ chlorine production. The probes were deployed in the sea for 48 days and their anti-biofouling efficiency was evaluated using the results of the field experiment, visual inspections, and calibration signal loss after the tests. The PLA and ABS were used as samplers without fouling protection. The probe with chlorine production outperformed the other techniques, providing reliable data during the in situ experiment. The copper probe had lower performance but still retarded the biological growth. The techniques based on transparent coatings, epoxy, and PDMS did not prevent biofilm formation and suffered mostly from micro-biofouling.
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Affiliation(s)
- Tiago Matos
- CMEMS-UMinho, Campus de Azurém, University of Minho, 4800-058 Guimarães, Portugal
- LABBELS—Associate Laboratory, 4800-058 Guimarães, Portugal
| | - Vânia Pinto
- CMEMS-UMinho, Campus de Azurém, University of Minho, 4800-058 Guimarães, Portugal
- LABBELS—Associate Laboratory, 4800-058 Guimarães, Portugal
| | - Paulo Sousa
- CMEMS-UMinho, Campus de Azurém, University of Minho, 4800-058 Guimarães, Portugal
- LABBELS—Associate Laboratory, 4800-058 Guimarães, Portugal
| | | | - Emilio Fernández
- Grupo de Oceanografía Biolóxica, Faculty of Marine Science, Universidade de Vigo, 36310 Vigo, Spain
| | - Renato Henriques
- Institute of Earth Sciences, Campus de Gualtar, University of Minho Pole, 4710-057 Braga, Portugal
| | - Luis Miguel Gonçalves
- CMEMS-UMinho, Campus de Azurém, University of Minho, 4800-058 Guimarães, Portugal
- LABBELS—Associate Laboratory, 4800-058 Guimarães, Portugal
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Peng Y, Wang P, Li J, Wu J, Lin F, Zhang D. Optimizing the Chlorine Evolution Reaction Performance of Co(OH)2 Catalyst for Enhanced Antifouling Ability. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.10.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Morphology regulation and application of nano cobalt oxide (Co3O4) electrocatalysts for chlorine evolution toward marine anti-biofouling. J Colloid Interface Sci 2022; 628:794-806. [DOI: 10.1016/j.jcis.2022.08.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 07/21/2022] [Accepted: 08/01/2022] [Indexed: 11/22/2022]
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