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Cheng Q, Wei H, Wang J, Wang ZQ, Gong XQ, Wang D. Clarifying the Direct Generation of •OH Radicals in Photocatalytic O 2 Reduction: Theoretical Prediction Combined with Experimental Validation. J Phys Chem Lett 2024:8650-8659. [PMID: 39151150 DOI: 10.1021/acs.jpclett.4c01779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/18/2024]
Abstract
This work systematically studied thermocatalytic and photocatalytic pathways of formaldehyde degradation and H-assisted O2 reduction over a Pt13/anatase-TiO2(101) composite via DFT calculations together with constrained molecular dynamics (MD) simulations. We show that photocatalytic O2 reduction on Pt/TiO2 can directly generate •OH radicals (*O2 → *OOH → •OH) via two hydrogenation steps with small barriers, and the product selectivity (*H2O2 or •OH) is decided by the relative position between catalyst Fermi level and •OH/*H2O2 redox potential (theoretical determination of 0.07 V referencing to the SHE). Such a novel reaction channel was furthermore validated at the liquid-solid interface via constrained MD simulations and experimental electron paramagnetic resonance detections, and a wide range of H resources, e.g., *HCHO, *HCO, *H (H+ + e-), can always drive the direct •OH generation. The additional portion of e--triggered •OH radicals are prone to diffuse into solution or the TiO2 surface and furthermore cooperate with the conventional h+-driven photooxidations.
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Affiliation(s)
- Qian Cheng
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Hehe Wei
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Jinling Wang
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Zhi-Qiang Wang
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
| | - Xue-Qing Gong
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Dong Wang
- State Key Laboratory of Green Chemical Engineering and Industrial Catalysis, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, P. R. China
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2
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Wang Z, Wang C, Wu X, Oh WD, Huang M, Zhou T. Sustainable H 2O 2 production in a floating dual-cathode electro-Fenton system for efficient decontamination of organic pollutants. CHEMOSPHERE 2024; 362:142635. [PMID: 38897323 DOI: 10.1016/j.chemosphere.2024.142635] [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: 02/10/2024] [Revised: 06/03/2024] [Accepted: 06/15/2024] [Indexed: 06/21/2024]
Abstract
Electrochemical advanced oxidation processes (EAOPs) based on natural air diffusion electrode (NADE) promise efficient and affordable advanced oxidation water purification, but the sustainable operation of such reaction systems remains challenging due to severe cathode electrowetting. Herein, a novel floating cathode (FC) composed of a stable hydrophobic three-phase interface was established by designing a flexible catalytic layer of FC. This innovative electrode configuration could effectively prolong the service life of the cathode by mitigating the interference of H2 bubbles from the hydrogen evolution reaction (HER), and the H2O2 production rate reached 37.59 mg h-1·cm-2 and realize a long-term stable operation for 10 h. Additionally, an FC/carbon felt (CF) dual-cathode electro-Fenton system was constructed for in situ sulfamethoxazole (SMX) degradation. Efficient H2O2 production on FC and Fe(III) reduction on CF were synchronously achieved, attaining excellent degradation efficiency for both SMX (ca. 100%) with 2.5 mg L-1 of Fe(Ⅱ) injection. For real wastewater, the COD removal of the FC/CF dual-cathode electro-Fenton system was stabilized at exceeding 75%. The practical application potential of the FC/CF dual-cathode electro-Fenton system was also demonstrated for the treatment of actual landfill leachate in continuous flow mode. This work provides a valuable path for constructing a sustainable dual-cathode electro-Fenton system for actual wastewater treatment.
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Affiliation(s)
- Zhicheng Wang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China; Hubei Key Laboratory of Multi-Media Pollution Cooperative Control in Yangtze Basin, School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Chen Wang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China; Hubei Key Laboratory of Multi-Media Pollution Cooperative Control in Yangtze Basin, School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Xiaohui Wu
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China; Hubei Key Laboratory of Multi-Media Pollution Cooperative Control in Yangtze Basin, School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Wen-Da Oh
- School of Chemical Sciences, Universiti Sains Malaysia, Penang, 11800, Malaysia
| | - Mingjie Huang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China; Hubei Key Laboratory of Multi-Media Pollution Cooperative Control in Yangtze Basin, School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.
| | - Tao Zhou
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China; Hubei Key Laboratory of Multi-Media Pollution Cooperative Control in Yangtze Basin, School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.
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3
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Oh S, Stache EE. Recent advances in oxidative degradation of plastics. Chem Soc Rev 2024; 53:7309-7327. [PMID: 38884337 DOI: 10.1039/d4cs00407h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2024]
Abstract
Oxidative degradation is a powerful method to degrade plastics into oligomers and small oxidized products. While thermal energy has been conventionally employed as an external stimulus, recent advances in photochemistry have enabled photocatalytic oxidative degradation of polymers under mild conditions. This tutorial review presents an overview of oxidative degradation, from its earliest examples to emerging strategies. This review briefly discusses the motivation and the development of thermal oxidative degradation of polymers with a focus on underlying mechanisms. Then, we will examine modern studies primarily relevant to catalytic thermal oxidative degradation and photocatalytic oxidative degradation. Lastly, we highlight some unique studies using unconventional approaches for oxidative polymer degradation, such as electrochemistry.
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Affiliation(s)
- Sewon Oh
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, USA
| | - Erin E Stache
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA.
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4
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Wang Z, Hu N, Wang L, Zhao H, Zhao G. In Situ Production of Hydroxyl Radicals via Three-Electron Oxygen Reduction: Opportunities for Water Treatment. Angew Chem Int Ed Engl 2024:e202407628. [PMID: 39007234 DOI: 10.1002/anie.202407628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 07/08/2024] [Accepted: 07/14/2024] [Indexed: 07/16/2024]
Abstract
The electro-Fenton (EF) process is an advanced oxidation technology with significant potential; however, it is limited by two steps: generation and activation of H2O2. In contrast to the production of H2O2 via the electrochemical two-electron oxygen reduction reaction (ORR), the electrochemical three-electron (3e-) ORR can directly activate molecular oxygen to yield the hydroxyl radical (⋅OH), thus breaking through the conceptual and operational limitations of the traditional EF reaction. Therefore, the 3e- ORR is a vital process for efficiently producing ⋅OH in situ, thus charting a new path toward the development of green water-treatment technologies. This review summarizes the characteristics and mechanisms of the 3e- ORR, focusing on the basic principles and latest progress in the in situ generation and efficient utilization of ⋅OH through the modulation of the reaction pathway, shedding light on the rational design of 3e- ORR catalysts, mechanistic exploration, and practical applications for water treatment. Finally, the future developments and challenges of efficient, stable, and large-scale utilization of ⋅OH are discussed based on achieving optimal 3e- ORR regulation and the potential to combine it with other technologies.
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Affiliation(s)
- Zhiming Wang
- School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai, 200092, P. R. China
| | - Nan Hu
- School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai, 200092, P. R. China
| | - Lan Wang
- School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai, 200092, P. R. China
| | - Hongying Zhao
- School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai, 200092, P. R. China
| | - Guohua Zhao
- School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai, 200092, P. R. China
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5
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Fajardo-Puerto E, López-García N, Elmouwahidi A, Bailón-García E, Carrasco-Marín F, Ramírez-Valencia LD, Pérez-Cadenas AF. Size Control of Carbon Xerogel Spheres as Key Factor Governing the H 2O 2 Selectivity in Metal-Free Bifunctional Electro-Fenton Catalysts for Tetracycline Degradation. Gels 2024; 10:306. [PMID: 38786223 PMCID: PMC11121276 DOI: 10.3390/gels10050306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Revised: 04/22/2024] [Accepted: 04/25/2024] [Indexed: 05/25/2024] Open
Abstract
Carbon xerogel spheres co-doped with nitrogen and eco-graphene were synthesized using a typical solvothermal method. The results indicate that the incorporation of eco-graphene enhances the electrochemical properties, such as the current density (JK) and the selectivity for the four transferred electrons (n). Additionally, nitrogen doping has a significant effect on the degradation efficiency, varying with the size of the carbon xerogel spheres, which could be attributed to the type of nitrogenous group doped in the carbon material. The degradation efficiency improved in the nanometric spheres (48.3% to 61.6%) but decreased in the micrometric-scale spheres (58.6% to 53.4%). This effect was attributed to the N-functional groups present in each sample, with N-CNS-5 exhibiting a higher percentage of graphitic nitrogen (35.7%) compared to N-CMS-5 (15.3%). These findings highlight the critical role of sphere size in determining the type of N-functional groups present in the sample. leading to enhanced degradation of pollutants as a result of the electro-Fenton process.
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Affiliation(s)
- Edgar Fajardo-Puerto
- Materiales Polifuncionales Basados en Carbono, Departamento de Química Inorgánica—Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente—Universidad de Granada (UEQ-UGR), 18071 Granada, Spain; (N.L.-G.); (A.E.); (F.C.-M.); (L.D.R.-V.); (A.F.P.-C.)
| | | | | | - Esther Bailón-García
- Materiales Polifuncionales Basados en Carbono, Departamento de Química Inorgánica—Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente—Universidad de Granada (UEQ-UGR), 18071 Granada, Spain; (N.L.-G.); (A.E.); (F.C.-M.); (L.D.R.-V.); (A.F.P.-C.)
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6
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Olvera-Vargas H, Selvam S, Veer R, García-Rodríguez O, Mutnuri S, Lefebvre O. A sustainable activated carbon fiber/TiO 2 cathode for the photoelectro-Fenton treatment of pharmaceutical pollutant enalapril. CHEMOSPHERE 2024; 353:141492. [PMID: 38387665 DOI: 10.1016/j.chemosphere.2024.141492] [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: 11/25/2023] [Revised: 02/15/2024] [Accepted: 02/16/2024] [Indexed: 02/24/2024]
Abstract
In this work, a TiO2-decorated electrode was fabricated by dip coating activated carbon fibers (ACF) with TiO2, which were then used as a cathode for the photoelectro-Fenton (PEF) treatment of the pharmaceutical enalapril, an angiotensin-converting enzyme inhibitor that has been detected in several waterways. The TiO2 coating was found to principally improve the electrocatalytic properties of ACF for H2O2 production via the 2-e- O2 reduction, in turn increasing enalapril degradation by PEF. The effect of the current density on the mineralization of enalapril was evaluated and the highest TOC removal yield (80.5% in 3 h) was obtained at 8.33 mA cm-2, in the presence of 0.5 mmol L-1 of Fe2+ catalyst. Under those conditions, enalapril was totally removed within the first 10 min of treatment with a rate constant k = 0.472 min-1. In contrast, uncoated ACF only achieved 60% of TOC removal in 3 h at 8.33 mA cm-2. A degradation pathway for enalapril mineralization is proposed, based on the degradation by-products identified during treatment. Overall, the results demonstrate the promises of TiO2 cathodes for PEF, a strategy that has often been overlooked in favor of photoelectrocatalysis (PEC) based on TiO2-modified photoanodes.
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Affiliation(s)
- Hugo Olvera-Vargas
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore, 117576, Singapore; Instituto de Energías Renovables, Universidad Nacional Autónoma de México (IER-UNAM), Priv. Xochicalco S/N, Col. Centro, Temixco, Morelos, 62580, Mexico.
| | - Suthan Selvam
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore, 117576, Singapore
| | - Rishikesh Veer
- Water Sanitation and Hygiene Laboratory, BITS Pilani, KK Birla Goa Campus, NH 17 B, Zuarinagar, Goa, 403726, India
| | - Orlando García-Rodríguez
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore, 117576, Singapore; NUS Environmental Research Institute, National University of Singapore, #02-03, T-Lab Building 5A Engineering Drive 1, 117411, Singapore
| | - Srikanth Mutnuri
- Water Sanitation and Hygiene Laboratory, BITS Pilani, KK Birla Goa Campus, NH 17 B, Zuarinagar, Goa, 403726, India
| | - Olivier Lefebvre
- Centre for Water Research, Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore, 117576, Singapore; NUS Environmental Research Institute, National University of Singapore, #02-03, T-Lab Building 5A Engineering Drive 1, 117411, Singapore.
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7
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Ramírez-Valencia LD, Bailón-García E, Moral-Rodríguez AI, Carrasco-Marín F, Pérez-Cadenas AF. Carbon Gels-Green Graphene Composites as Metal-Free Bifunctional Electro-Fenton Catalysts. Gels 2023; 9:665. [PMID: 37623120 PMCID: PMC10454076 DOI: 10.3390/gels9080665] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 08/09/2023] [Accepted: 08/16/2023] [Indexed: 08/26/2023] Open
Abstract
The Electro-Fenton (EF) process has emerged as a promising technology for pollutant removal. However, the EF process requires the use of two catalysts: one acting as an electrocatalyst for the reduction of oxygen to H2O2 and another Fenton-type catalyst for the generation of ·OH radicals from H2O2. Thus, the search for materials with bifunctionality for both processes is required for a practical and real application of the EF process. Thus, in this work, bifunctional electrocatalysts were obtained via doping carbon microspheres with Eco-graphene, a form of graphene produced using eco-friendly methods. The incorporation of Eco-graphene offers numerous advantages to the catalysts, including enhanced conductivity, leading to more efficient electron transfer during the Electro-Fenton process. Additionally, the synthesis induced structural defects that serve as active sites, promoting the direct production of hydroxyl radicals via a 3-electron pathway. Furthermore, the spherical morphology of carbon xerogels enhances the accessibility of the reagents to the active sites. This combination of factors results in the effective degradation of Tetracycline (TTC) using metal-free catalysts in the Electro-Fenton process, achieving up to an impressive 83% degradation without requiring any other external or additional catalyst.
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Affiliation(s)
- Lilian D. Ramírez-Valencia
- Materiales Polifuncionales Basados en Carbono (UGR-Carbon), Dpto. Química Inorgánica-Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente-Universidad de Granada (UEQ-UGR), ES18071 Granada, Spain; (E.B.-G.); (A.I.M.-R.); (F.C.-M.)
| | | | | | | | - Agustín F. Pérez-Cadenas
- Materiales Polifuncionales Basados en Carbono (UGR-Carbon), Dpto. Química Inorgánica-Unidad de Excelencia Química Aplicada a Biomedicina y Medioambiente-Universidad de Granada (UEQ-UGR), ES18071 Granada, Spain; (E.B.-G.); (A.I.M.-R.); (F.C.-M.)
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8
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Jaswal V, J RB, N YK. Synergistic effect of TiO 2 nanostructured cathode in microbial fuel cell for bioelectricity enhancement. CHEMOSPHERE 2023; 330:138556. [PMID: 37003439 DOI: 10.1016/j.chemosphere.2023.138556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 03/19/2023] [Accepted: 03/29/2023] [Indexed: 05/14/2023]
Abstract
Nano-bedecking of electrode with nanoparticles is an effective method to improve power generation of microbial fuel cells (MFCs). In this study, different concentrations (0.25 mg cm-2, 0.50 mg cm-2, 0.75 mg cm-2 and 1.0 mg cm-2) of TiO2 nanoparticles of size 10-25 nm were overlaid on the carbon cloth (CC) using spray pyrolysis technique and used as catalytic cathode in a dual-chambered microbial fuel cell treating distillery wastewater. Results evidenced that TiO2 nanoparticles modified cathode increased the power generation and recorded a highest power and current density of 162.5 ± 2 mW m-2 and 1.4 ± 0.005 A m-2, respectively. Carbon cloth coated with 0.50 mg cm-2 TiO2 nanoparticles showed 2.8 and 7.3 times higher current and power density as compared to uncoated cathode. MFC operated at a hydraulic retention time (HRT) and organic loading rate (OLR) of 72 h and 59.2 g COD L-1 d-1 showed a maximum chemical oxygen demand (COD) removal of 72.3% which was 15.3% higher than the control MFC. Likewise, the coulombic efficiency of control and modified MFC was 33% and 44%, respectively. The maximum NO3-- N, NO2-- N and NH4+- N removal efficiency of 77.3%, 49.9% and 59.4% were observed for TiO2 nanoparticles modified electrode which was 19.3%, 11.4% and 10.5% higher than control. TiO2 modified cathode was effective in enhancing the bioelectricity generation in MFCs.
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Affiliation(s)
- Vijay Jaswal
- Department of Environmental Science and Technology, Central University of Punjab, Bathinda, Punjab, 151401, India
| | - Rajesh Banu J
- Department of Biotechnology, Central University of Tamil Nadu, Tiruvarur, 610005, Tamil Nadu, India
| | - Yogalakshmi K N
- Department of Environmental Science and Technology, Central University of Punjab, Bathinda, Punjab, 151401, India.
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9
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Anodic electrocatalytic behavior of graphite supported TiO2 towards the generation of hydroxyl radicals. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.141303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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10
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Zheng X, Gao M, Liang C, Wang S, Wang X. Expanded graphite supported TiO2 composites using polyaniline as the anchor: Improved catalytic performance for the electro-Fenton-like reaction. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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11
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Tu S, Ning Z, Duan X, Zhao X, Chang L. Efficient electrochemical hydrogen peroxide generation using TiO2/rGO catalyst and its application in electro-Fenton degradation of methyl orange. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Zhang C, Yu Z, Wang X. A review of electrochemical oxidation technology for advanced treatment of medical wastewater. Front Chem 2022; 10:1002038. [PMID: 36186585 PMCID: PMC9520591 DOI: 10.3389/fchem.2022.1002038] [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: 07/24/2022] [Accepted: 08/23/2022] [Indexed: 12/05/2022] Open
Abstract
Antibiotics widely exist in medical wastewater, which seriously endanger human health. With the spread of the COVID-19 and monkeypox around the world, a large number of antibiotics have been abused and discharged. How to realize the green and efficient treatment of medical wastewater has become a hot research topic. As a common electrochemical water treatment technology, electrochemical oxidation technology (EOT) could effectively achieve advanced treatment of medical wastewater. Since entering the 21st century, electrochemical oxidation water treatment technology has received more and more attention due to its green, efficient, and easy-to-operate advantages. In this study, the research progress of EOT for the treatment of medical wastewater was reviewed, including the exploration of reaction mechanism, the preparation of functional electrode materials, combining multiple technologies, and the design of high-efficiency reactors. The conclusion and outlook of EOT for medical wastewater treatment were proposed. It is expected that the review could provide prospects and guidance for EOT to treat medical wastewater.
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Affiliation(s)
- Chengyu Zhang
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China
- Binzhou Institute of Technology, Weiqiao-UCAS Science and Technology Park, Binzhou, Shandong Province, China
- RCEES-IMCAS-UCAS Joint-Lab of Microbial Technology for Environmental Science, Beijing, China
| | - Zhisheng Yu
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China
- Binzhou Institute of Technology, Weiqiao-UCAS Science and Technology Park, Binzhou, Shandong Province, China
- RCEES-IMCAS-UCAS Joint-Lab of Microbial Technology for Environmental Science, Beijing, China
- *Correspondence: Zhisheng Yu,
| | - Xiangyang Wang
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China
- Binzhou Institute of Technology, Weiqiao-UCAS Science and Technology Park, Binzhou, Shandong Province, China
- RCEES-IMCAS-UCAS Joint-Lab of Microbial Technology for Environmental Science, Beijing, China
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13
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Wang K, Zhao K, Qin X, Chen S, Yu H, Quan X. Treatment of organic wastewater by a synergic electrocatalysis process with Ti 3+ self-doped TiO 2 nanotube arrays electrode as both cathode and anode. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127747. [PMID: 34823953 DOI: 10.1016/j.jhazmat.2021.127747] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 10/27/2021] [Accepted: 11/08/2021] [Indexed: 06/13/2023]
Abstract
Electrochemical anodic oxidation (AO) is a promising technology for wastewater treatment due to its strong oxidation property and environmental compatibility. However, it suffers from high energy consumption for pollutants removal due to the side-reactions of hydrogen evolution reaction on cathode and oxygen evolution reaction on anode. Combining electro-Fenton (EF) with AO not only generated •OH for pollutants degradation but also increased current efficiency. This work investigated a synergic electrocatalysis process between EF and AO with Ti3+ self-doped TiO2 nanotube arrays (Ti3+/TNTAs) electrode as both cathode and anode for wastewater treatment. The pseudo-first-order kinetic rate constant of phenol degradation by EF+AO (0.107 min-1) was 9.7 or 6.3 times as much as that of only EF (0.011 min-1) or AO (0.017 min-1) process, respectively. Enhanced pollutants removal of EF+AO could be attributed to the coexistence of •OH oxidation and direct oxidation on Ti3+/TNTAs surface. The COD of secondary effluent of coking wastewater decreased from 159.3 mg L-1 to 47.0 mg L-1 by EF+AO within 120 min with low specific energy consumption (9.5 kWh kg-1 COD-1). This work provided a new insight into design of the energy-efficient synergic electrocatalysis process for refractory pollutants degradation.
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Affiliation(s)
- Kaixuan Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China
| | - Kun Zhao
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China
| | - Xin Qin
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China
| | - Shuo Chen
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China
| | - Hongtao Yu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China
| | - Xie Quan
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China.
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14
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Moon S, Kamakshaiah Charyulu D, Lee W, Lee K. Controlling the geometric design of anodic 1D TiO2 nanotubes for the electrochemical reduction of 2,4,6-trinitrotoluene in ambient conditions. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115717] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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15
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Zhang W, Gao M, Miao F, Wu X, Wang S, Wang X. A permeable electrochemical reactive barrier for underground water remediation using TiO 2/graphite composites as heterogeneous electrocatalysts without releasing of chemical substances. JOURNAL OF HAZARDOUS MATERIALS 2021; 418:126318. [PMID: 34118548 DOI: 10.1016/j.jhazmat.2021.126318] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 05/25/2021] [Accepted: 06/01/2021] [Indexed: 06/12/2023]
Abstract
Permeable reactive barriers (PRBs) are well-studied and widely-applied technologies in underground water remediation. However, the releasing of chemical substances cannot be avoided during the PRBs operation. In this study, a novel permeable electrochemical reactive barrier (PERB) was fabricated for underground water remediation using a TiO2/graphite composite (TiO2/C) as the heterogeneous electrocatalyst. TiO2/C performed an electro-Fenton-like reaction on cathode and an anodic oxidation on anode respectively, along with the variety of the TiO2 lattice. The performance of this PERB system was evaluated using tetracycline hydrochloride (TTC) degradation. TTC could be degraded at a low applied potential and a wide range of pH. The degradation rate of about 60% was obtained at the optimized reaction condition: the interelectrode potential difference of 1.2 V, pH 3.0, the anode 10 cm above cathode. The relative position and spacing of the electrodes effected the mass transfer equilibrium of TTC. During the 25-day persistent degradation of TTC, the PERB system shown a perfect stability with rarely leaching of Ti. This work explored the potential for underground water remediation by the electrocatalysis with the goal of establishing a clean and eco-friendly PERB system.
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Affiliation(s)
- Wen Zhang
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China
| | - Mingming Gao
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.
| | - Fei Miao
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China
| | - Xiaoyan Wu
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China
| | - Shuguang Wang
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China
| | - Xinhua Wang
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.
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Mendonça CD, Khan SU, Rahemi V, Verbruggen SW, Machado SA, De Wael K. Surface plasmon resonance-induced visible light photocatalytic TiO2 modified with AuNPs for the quantification of hydroquinone. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138734] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Wang K, Li X, Wang N, Shen Q, Liu M, Zhou J, Li N. Z-Scheme Core–Shell meso-TiO 2@ZnIn 2S 4/Ti 3C 2 MXene Enhances Visible Light-Driven CO 2-to-CH 4 Selectivity. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c00713] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ke Wang
- School of Chemistry and Chemical Engineering, Southeast University, No. 2 Dongnandaxue Road, Nanjing, Jiangsu 211189, P. R. China
| | - Xianhe Li
- School of Chemistry and Chemical Engineering, Southeast University, No. 2 Dongnandaxue Road, Nanjing, Jiangsu 211189, P. R. China
| | - Nan Wang
- School of Chemistry and Chemical Engineering, Southeast University, No. 2 Dongnandaxue Road, Nanjing, Jiangsu 211189, P. R. China
| | - Quanhao Shen
- School of Chemistry and Chemical Engineering, Southeast University, No. 2 Dongnandaxue Road, Nanjing, Jiangsu 211189, P. R. China
| | - Maochang Liu
- International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, No. 28 Xianning West Road, Xi’an, Shaanxi 710049, P. R. China
- Suzhou Academy of Xi’an Jiaotong University, No. 99 Ren’ai Road, Suzhou, Jiangsu 215123, P. R. China
| | - Jiancheng Zhou
- School of Chemistry and Chemical Engineering, Southeast University, No. 2 Dongnandaxue Road, Nanjing, Jiangsu 211189, P. R. China
- Jiangsu Key Laboratory for Biomass Energy and Material, No. 16 Suojin Wucun, Nanjing, Jiangsu 210042, P. R. China
| | - Naixu Li
- School of Chemistry and Chemical Engineering, Southeast University, No. 2 Dongnandaxue Road, Nanjing, Jiangsu 211189, P. R. China
- Jiangsu Key Laboratory for Biomass Energy and Material, No. 16 Suojin Wucun, Nanjing, Jiangsu 210042, P. R. China
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Miao F, Liu Y, Gao M, Yu X, Xiao P, Wang M, Wang S, Wang X. Degradation of polyvinyl chloride microplastics via an electro-Fenton-like system with a TiO 2/graphite cathode. JOURNAL OF HAZARDOUS MATERIALS 2020; 399:123023. [PMID: 32535518 DOI: 10.1016/j.jhazmat.2020.123023] [Citation(s) in RCA: 106] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 05/20/2020] [Accepted: 05/21/2020] [Indexed: 05/26/2023]
Abstract
Nowadays, microplastic pollution has been brought into focus for its hazards to aquatic life. However, researches on the electrocatalytic treatment for efficient degradation of microplastics are still insufficient. Herein, an electro-Fenton like (EF-like) technology based on TiO2/graphite (TiO2/C) cathode was put forward to degrade polyvinyl chloride (PVC), a typical microplastic in water. It exhibited a remarkable performance on PVC degradation via cathodic reduction dechlorination and hydroxyl radical (OH) oxidation simultaneously. Besides, the effects of reaction temperature and initial PVC concentration were investigated. Under optimal conditions, the dechlorination efficiency of PVC reached 75 % after potentiostatic electrolysis at -0.7 V vs. Ag/AgCl for 6 h. The intermediate products were explored during the degradation of PVC microplastics. The surface morphologies and molecular weight of PVC changed accordingly. Based on these results, a possible degradation process for PVC was proposed. This work demonstrated that such a heterogeneous EF-like technology using TiO2/C cathode was hopefully to provide an eco-friendly method for microplastic wastewater treatment.
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Affiliation(s)
- Fei Miao
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266200, China
| | - Yanfeng Liu
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266200, China
| | - Mingming Gao
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266200, China.
| | - Xin Yu
- Institute for Advanced Interdisciplinary Research (iAIR), University of Jinan, Jinan, 250022, China
| | - Pengwei Xiao
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266200, China
| | - Mei Wang
- The Key Laboratory of Plant Development and Environment Adaptation Biology, Ministry of Education, School of Life Science, Shandong University, Qingdao, 266237, China
| | - Shuguang Wang
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266200, China
| | - Xinhua Wang
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266200, China
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Integration of a photoelectrochemical cell in a flow system for quantification of 4-aminophenol with titanium dioxide. Electrochem commun 2020. [DOI: 10.1016/j.elecom.2020.106767] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
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