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Zhu J, Cheng X, Cui Y, Chen F. Photocatalytic activity and mechanism of YMnO 3/NiO photocatalyst for the degradation of oil and gas field wastewater. Front Chem 2024; 12:1408961. [PMID: 38752200 PMCID: PMC11094212 DOI: 10.3389/fchem.2024.1408961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Accepted: 04/19/2024] [Indexed: 05/18/2024] Open
Abstract
One-step hydrothermal method has been used to synthesize YMnO3@NiO (YMO@NO) photocatalysts with high photocatalytic activity for the degradation of oil and gas field wastewater under simulated solar irradiation. Through various characterization methods, it has been confirmed that the YMO@NO photocatalyst comprises only YMO and NO, without any other impurities. The microstructure characterization confirmed that the YMO@NO photocatalyst was composed of large squares and fine particles, and heterojunction was formed at the interface of YMO and NO. The optical properties confirm that the YMO@NO photocatalyst has high UV-vis optical absorption coefficient, suggesting that it has high UV-vis photocatalytic activity. Taking oil and gas field wastewater as degradation object, YMO@NO photocatalyst showed the highest photocatalytic activity (98%) when the catalyst content was 1.5 g/L, the mass percentage of NO was 3%, and the irradiation time was 60 min. Capture and stability experiments confirm that the YMO@NO photocatalyst is recyclable and electrons, holes, hydroxyl radicals and superoxide radicals play major roles in the photocatalysis process. Based on experiments and theoretical calculations, a reasonable photocatalytic mechanism of the YMO@NO photocatalyst is proposed.
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Affiliation(s)
- Jiang Zhu
- Yangzhou Inspection and Testing Center, Yangzhou, China
- School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou, China
| | - Xiaoyi Cheng
- School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou, China
| | - Yajing Cui
- School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou, China
| | - Feng Chen
- School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou, China
- Key Laboratory of Environmental Functional Materials in Jiangsu Province Universities, Suzhou University of Science and Technology, Suzhou, China
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Sohn EJ, Jun BM, Nam SN, Park CM, Jang M, Son A, Yoon Y. Photocatalytic boron nitride-based nanomaterials for the removal of selected organic and inorganic contaminants in aqueous solution: A review. CHEMOSPHERE 2024; 349:140800. [PMID: 38040264 DOI: 10.1016/j.chemosphere.2023.140800] [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: 08/17/2023] [Revised: 11/20/2023] [Accepted: 11/22/2023] [Indexed: 12/03/2023]
Abstract
Boron nitride (BN) coupled with various conventional and advanced photocatalysts has been demonstrated to exhibit extraordinary activity for photocatalytic degradation because of its unique properties, including a high surface area, constant wide-bandgap semiconducting property, high thermal-oxidation resistance, good hydrogen-adsorption performance, and high chemical/mechanical stability. However, only limited reviews have discussed the application of BN or BN-based nanomaterials as innovative photocatalysts, and it does not cover the recent results and the developments on the application of BN-based nanomaterials for water purification. Herein, we present a complete review of the present findings on the photocatalytic degradation of different contaminants by various BN-based nanomaterials. This review includes the following: (i) the degradation behavior of different BN-based photocatalysts for various contaminants, such as selected dye compounds, pharmaceuticals, personal care products, pesticides, and inorganics; (ii) the stability/reusability of BN-based photocatalysts; and (iii) brief discussion for research areas/future studies on BN-based photocatalysts.
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Affiliation(s)
- Erica Jungmin Sohn
- Water Supply and Sewerage Department, DOHWA Engineering Co., LTD, 438, Samseong-ro, Gangnam-gu, Seoul, 06178, Republic of Korea
| | - Byung-Moon Jun
- Radwaste Management Center, Korea Atomic Energy Research Institute (KAERI), 111 Daedeok-daero 989 Beon-gil, Yuseong-gu, Daejeon, 34057, Republic of Korea
| | - Seong-Nam Nam
- Department of Environmental Science and Engineering, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, 03760, Republic of Korea
| | - Chang Min Park
- Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea
| | - Min Jang
- Department of Environmental Engineering, Kwangwoon University, 447-1 Wolgye-dong Nowon-gu, Seoul, Republic of Korea
| | - Ahjeong Son
- Department of Environmental Science and Engineering, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, 03760, Republic of Korea.
| | - Yeomin Yoon
- Department of Environmental Science and Engineering, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul, 03760, Republic of Korea; Department of Civil and Environmental Engineering, University of South Carolina, Columbia, 300 Main Street, SC, 29208, USA.
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Kuk-Dzul L, Jiménez LF, Vega-Azamar RE, Gurrola MP, Cruz JC, Trejo-Arroyo DL. Photocatalytic Activity and Self-Cleaning Effect of Coating Mortars with TiO 2 Added: Practical Cases in Warm Sub-Humid Climates. MATERIALS (BASEL, SWITZERLAND) 2023; 17:190. [PMID: 38204042 PMCID: PMC10779537 DOI: 10.3390/ma17010190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 10/30/2023] [Accepted: 11/02/2023] [Indexed: 01/12/2024]
Abstract
In this study, the photocatalytic activity of coating mortars with synthetized and commercial TiO2 nanoparticles added has been evaluated at 2, 3 and 5% by weight of cement by calculating the degradation efficiency of methyl orange and red wine dyes exposed to both visible-light and UV radiation; also, the self-cleaning effect of coatings exposed to weather conditions (warm sub-humid climate) was assessed. TiO2 nanoparticles were synthesized via the sol-gel method to a low synthesis temperature and characterized via X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM). The results show synthesized TiO2 particles in anatase phase with a crystallite size of 14.69 nm, and hemispherical particles with sizes of submicron order. The addition percentage with the best performance in the coating mortars was 3%, with both commercial and synthesized TiO2; however, coating mortars with synthesized TiO2 exhibited the highest degradation efficiency for both dyes when they were exposed to visible light, while mortars with commercial TiO2 exhibited the highest degradation efficiency when exposed to UV radiation. In addition, in coating mortars with synthesized TiO2, the self-cleaning effect was evident from the beginning of exposure to weather, reaching the largest dye-free surface at the end of exposure. The compressive strength increased significantly in mortars with TiO2 addition.
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Affiliation(s)
- Liliana Kuk-Dzul
- Tecnológico Nacional de México/I.T. de Chetumal, Av. Insurgentes 330, Chetumal 77013, Mexico; (L.K.-D.); (L.F.J.); (R.E.V.-A.)
| | - Luis F. Jiménez
- Tecnológico Nacional de México/I.T. de Chetumal, Av. Insurgentes 330, Chetumal 77013, Mexico; (L.K.-D.); (L.F.J.); (R.E.V.-A.)
| | - Ricardo E. Vega-Azamar
- Tecnológico Nacional de México/I.T. de Chetumal, Av. Insurgentes 330, Chetumal 77013, Mexico; (L.K.-D.); (L.F.J.); (R.E.V.-A.)
| | - Mayra P. Gurrola
- IxM-CONAHCYT-Tecnológico Nacional de México/I.T. de Chetumal, Av. Insurgentes 330, Chetumal 77013, Mexico;
| | - Julio C. Cruz
- Tecnológico Nacional de México/I.T. de Chetumal, Av. Insurgentes 330, Chetumal 77013, Mexico; (L.K.-D.); (L.F.J.); (R.E.V.-A.)
| | - Danna L. Trejo-Arroyo
- IxM-CONAHCYT-Tecnológico Nacional de México/I.T. de Chetumal, Av. Insurgentes 330, Chetumal 77013, Mexico;
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Yu J, Yan W, Zhu B, Xu Z, Hu S, Xi W, Lan Y, Han W, Cheng C. Degradation of carbamazepine by high-voltage direct current gas-liquid plasma with the addition of H 2O 2 and Fe 2. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:77771-77787. [PMID: 35687287 DOI: 10.1007/s11356-022-21250-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 05/30/2022] [Indexed: 06/15/2023]
Abstract
Carbamazepine (CBZ) is a typical psychotropic pharmaceutical which is one of the most commonly detected persistent pharmaceuticals in the environment. The degradation of CBZ in the aqueous solution was studied by a direct current (DC) gas-liquid phase discharge plasma combined with different catalysts (H2O2 or Fe2+) in this study. The concentrations of reactive species (H2O2, O3, and NO3-) and •OH radical yield in the liquid were measured during the discharge process. The various parameters that affect the degradation of CBZ, such as discharge powers, initial concentrations, initial pH values, and addition of catalysts, were investigated. The energy efficiency was 25.2 mg·kW-1·h-1 at 35.7 W, and the discharge power at 35.7 W was selected to achieve the optimal balance on the degradation effect and energy efficiency. Both acidic and alkaline solution conditions were conducive to promoting the degradation of CBZ. Both H2O2 and Fe2+ at low concentration (10-100 mg/L of Fe2+, 0.05-2.0 mmol/L of H2O2) were observed contributing to the improvement of the CBZ degradation rate, while the promotional effect of CBZ degradation was weakened even inhibition would occur at high concentrations (100-200 mg/L of Fe2+, 2.0-5.0 mmol/L of H2O2). The degradation rate of CBZ was up to 99.1%, and the total organic carbon (TOC) removal efficiency of CBZ was up to 67.1% in the plasma/Fe2+ (100 mg/L) system at 48 min, which suggested that high degradation rate and mineralization efficiency on CBZ could be achieved by employing Fe2+ as a catalyst. Based on the intermediate products identified by Ultra Performance Liquid Chromatography Tandem Mass Spectrometry (UPLC-MS), the possible degradation pathways were proposed. Finally, the growth inhibition assay with Escherichia coli (E. coli) showed that the toxicity of plasma/Fe2+-treated CBZ solution decreased and a relatively low solution toxicity could be achieved. Thus, the plasma/catalyst could be an effective technology for the degradation of pharmaceuticals in aqueous solutions.
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Affiliation(s)
- Jinming Yu
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, People's Republic of China
| | - Weiwen Yan
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, People's Republic of China
| | - Bin Zhu
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, People's Republic of China
| | - Zimu Xu
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, People's Republic of China
| | - Shuheng Hu
- School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, People's Republic of China
| | - Wenhao Xi
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, 230031, People's Republic of China
| | - Yan Lan
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, 230031, People's Republic of China
- Institute of Energy, Hefei Comprehensive National Science Center, Hefei, 230031, People's Republic of China
| | - Wei Han
- Institute of Health and Medical Technology, Anhui Province Key Laboratory of Medical Physics and Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, People's Republic of China
| | - Cheng Cheng
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, 230031, People's Republic of China.
- Institute of Energy, Hefei Comprehensive National Science Center, Hefei, 230031, People's Republic of China.
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Current Trends in the Utilization of Photolysis and Photocatalysis Treatment Processes for the Remediation of Dye Wastewater: A Short Review. CHEMENGINEERING 2022. [DOI: 10.3390/chemengineering6040058] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
Development in the textile industry leads to an increased demand for the use of various dyes. Moreover, there is the use of some dyes in the food industry as well as medical diagnostics. Thereby, increased demand for dyes in various fields has resulted in dye-containing wastewater. Only a small portion of the generated wastewater is adequately treated. The rest is usually dumped or otherwise directly discharged into the sewage system, which ultimately enters rivers, lakes, and streams. The handling and disposal of such concentrated wastewater, especially the dye-containing wastewater, is considered to be a major environmental issue from the moment of its generation to its ultimate disposal. Conventional water treatment methods such as flotation, filtration, adsorption, etc., are non-destructive physical separation processes. They only transfer the pollutants to other phases, thereby generating concentrated deposits. The advanced oxidation process (AOP) is one of the most effective emerging methods for the treatment of wastewater containing chemical pollutants. The method involves the formation and interaction of highly reactive hydroxyl radicals under suitable activation conditions. These radicals are non-selective and efficient for the destruction and eventual mineralization of recalcitrant organic pollutants. This review aims at the pros and cons of using photocatalysis as an efficient AOP to degrade dye-containing wastewater.
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Chakachaka V, Tshangana C, Mahlangu O, Mamba B, Muleja A. Interdependence of Kinetics and Fluid Dynamics in the Design of Photocatalytic Membrane Reactors. MEMBRANES 2022; 12:membranes12080745. [PMID: 36005662 PMCID: PMC9412706 DOI: 10.3390/membranes12080745] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Revised: 06/11/2022] [Accepted: 06/15/2022] [Indexed: 01/18/2023]
Abstract
Photocatalytic membrane reactors (PMRs) are a promising technology for wastewater reclamation. The principles of PMRs are based on photocatalytic degradation and membrane rejection, the different processes occurring simultaneously. Coupled photocatalysis and membrane filtration has made PMRs suitable for application in the removal of emerging contaminants (ECs), such as diclofenac, carbamazepine, ibuprofen, lincomycin, diphenhydramine, rhodamine, and tamoxifen, from wastewater, while reducing the likelihood of byproducts being present in the permeate stream. The viability of PMRs depends on the hypotheses used during design and the kinetic properties of the systems. The choice of design models and the assumptions made in their application can have an impact on reactor design outcomes. A design’s resilience is due to the development of a mathematical model that links material and mass balances to various sub-models, including the fluid dynamic model, the radiation emission model, the radiation absorption model, and the kinetic model. Hence, this review addresses the discrepancies with traditional kinetic models, fluid flow dynamics, and radiation emission and absorption, all of which have an impact on upscaling and reactor design. Computational and analytical descriptions of how to develop a PMR system with high throughput, performance, and energy efficiency are provided. The potential solutions are classified according to the catalyst, fluid dynamics, thickness, geometry, and light source used. Two main PMR types are comprehensively described, and a discussion of various influential factors relating to PMRs was used as a premise for developing an ideal reactor. The aim of this work was to resolve potential divergences that occur during PMRs design as most real reactors do not conform to the idealized fluid dynamics. Lastly, the application of PMRs is evaluated, not only in relation to the removal of endocrine-disrupting compounds (EDCs) from wastewater, but also in dye, oil, heavy metals, and pesticide removal.
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Salhi A, Esserrar S, Nechchadi B, El Amine Ghanjaoui M, Aguedache A, El Krati M, Tahiri S. Application of titanium dioxide immobilized on a cellulosic material for the photocatalytic degradation of Acid Black 24 dye in a continuous flow cascade reactor. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:46778-46787. [PMID: 35174458 DOI: 10.1007/s11356-022-19210-1] [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: 09/23/2021] [Accepted: 02/10/2022] [Indexed: 06/14/2023]
Abstract
The aim of this work is the study of the photocatalytic degradation of Acid Black 24 dye (AB24), in a continuous flow cascade reactor, using titanium dioxide (TiO2) immobilized on a cellulosic material. The results obtained demonstrated a synergistic effect of the two phenomena adsorption and photocatalysis. The effects of various parameters that affect the dye removal efficiency were investigated. The best photocatalytic degradation yield of AB24 molecules is obtained in acidic medium because of the strong attraction between the positively charged catalyst and the anionic dye molecules. The optimum times for obtaining the best yields depend on the initial concentration of the dye, the volume of the treated solution, and the feed rate of the reactor. In addition, reusing the catalytic material several times is technically possible; this can decrease the cost of treatment for a possible industrial scale application.
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Affiliation(s)
- Anas Salhi
- Laboratory of Water and Environment, Research team: Analytical Chemistry and Environmental Process Engineering, Department of Chemistry, Faculty of Sciences of El Jadida, University Chouaïb Doukkali, P.O. Box 20, 24000, El Jadida, Morocco
| | - Sana Esserrar
- Laboratory of Water and Environment, Research team: Analytical Chemistry and Environmental Process Engineering, Department of Chemistry, Faculty of Sciences of El Jadida, University Chouaïb Doukkali, P.O. Box 20, 24000, El Jadida, Morocco
| | - Bouchra Nechchadi
- Laboratory of Water and Environment, Research team: Analytical Chemistry and Environmental Process Engineering, Department of Chemistry, Faculty of Sciences of El Jadida, University Chouaïb Doukkali, P.O. Box 20, 24000, El Jadida, Morocco
| | - Mohammed El Amine Ghanjaoui
- Laboratory of Water and Environment, Research team: Analytical Chemistry and Environmental Process Engineering, Department of Chemistry, Faculty of Sciences of El Jadida, University Chouaïb Doukkali, P.O. Box 20, 24000, El Jadida, Morocco
| | - Abdelkahhar Aguedache
- Laboratory of Water and Environment, Research team: Analytical Chemistry and Environmental Process Engineering, Department of Chemistry, Faculty of Sciences of El Jadida, University Chouaïb Doukkali, P.O. Box 20, 24000, El Jadida, Morocco
| | - Mohammed El Krati
- Laboratory of Water and Environment, Research team: Analytical Chemistry and Environmental Process Engineering, Department of Chemistry, Faculty of Sciences of El Jadida, University Chouaïb Doukkali, P.O. Box 20, 24000, El Jadida, Morocco
| | - Soufiane Tahiri
- Laboratory of Water and Environment, Research team: Analytical Chemistry and Environmental Process Engineering, Department of Chemistry, Faculty of Sciences of El Jadida, University Chouaïb Doukkali, P.O. Box 20, 24000, El Jadida, Morocco.
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Advanced Photocatalytic Treatment of Wastewater Using Immobilized Titanium Dioxide as a Photocatalyst in a Pilot-Scale Reactor: Process Intensification. MATERIALS 2022; 15:ma15134547. [PMID: 35806678 PMCID: PMC9267797 DOI: 10.3390/ma15134547] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 06/21/2022] [Accepted: 06/22/2022] [Indexed: 11/16/2022]
Abstract
In many nations, particularly those experiencing water scarcity, novel approaches are being applied to clean wastewater. Heterogeneous photocatalysis is the most widely used of these approaches because it entails the decomposition of organic molecules into water and carbon dioxide, which is a more ecologically benign process. In our study, we studied the photocatalytic degradation process on the effluent flumequine. This treatment is made through a solar pilot reactor in the presence of immobilized titanium dioxide with three light intensities and two types of water as solvents. A variety of factors that might influence the rate of deterioration, such as flow rate, light intensity, and initial concentration, have been investigated. The maximal degradation of flumequine was achieved at more than 90% after 2.5 h under optimal conditions (an initial concentration of 5 mg/L, three lamp light intensities, and a flow rate of 29 L/h). By combining the oxidized agent H2O2 with this process, the photocatalytic activity was improved further to 97% under the same conditions. The mineralization of this product has also been tested using total organic carbon (TOC) analysis. A high mineralization rate has been recorded at around 50% for a high initial concentration (20 mg/L) at a flow rate of 126 L/h. The results demonstrated the highly effective removal of flumequine and the efficacy of this photocatalytic system.
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Acosta-Angulo B, Lara-Ramos J, Diaz-Angulo J, Torres-Palma R, Martínez-Pachon D, Moncayo-Lasso A, Machuca-Martínez F. Analysis of the Applications of Particle Swarm Optimization and Genetic Algorithms on Reaction Kinetics: A Prospective Study for Advanced Oxidation Processes. ChemElectroChem 2022. [DOI: 10.1002/celc.202200229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - Jose Lara-Ramos
- Universidad del Valle Escuela de Ingeniería Química COLOMBIA
| | | | - Ricardo Torres-Palma
- Universidad de Antioquía: Universidad de Antioquia Facultad de Ciencias Exactas y Naturales COLOMBIA
| | - Diana Martínez-Pachon
- Universidad Antonio Nariño: Universidad Antonio Narino Facultad de Ciencias COLOMBIA
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Ponkshe A, Thakur P. Solar light-driven photocatalytic degradation and mineralization of beta blockers propranolol and atenolol by carbon dot/TiO 2 composite. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:15614-15630. [PMID: 34628578 DOI: 10.1007/s11356-021-16796-w] [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: 05/21/2021] [Accepted: 09/24/2021] [Indexed: 06/13/2023]
Abstract
Herein improved solar light-driven photocatalytic degradation and mineralization of two emerging pollutants as well as recalcitrant beta blockers propranolol (PR) and atenolol (AT) have been demonstrated by metal-free carbon dot/TiO2 (CDT) composite. Hydrothermally synthesized TiO2 has been decorated with electrochemically synthesized carbon dots (CDs) and was well characterized by various analytical techniques viz. XRD, FTIR, Raman, XPS, UV-visible DRS, FESEM, and TEM. The optimized CDT composite, 2CDT (2 mL carbon dot/TiO2), showed ~ 3.45- and ~ 1.75-fold enhancement in the photodegradation rate as compared to pristine TiO2 for PR and AT respectively in 1 hour of irradiation along with complete degradation of PR and AT after 3 hours of irradiation. 2CDT exhibited 76% and 80% mineralization of PR and AT in contrast with 62% and 47% observed by pristine TiO2. Further, the major reaction intermediates formed after degradation have been identified by HPLC/MS analysis, confirming more than 99% reduction of the parent compound for both PR and AT. Reusability of the optimized catalyst also showed successful degradation up to 3 cycles, showing reduction abilities of 97%, 95%, and 94% for 1st, 2nd, and 3rd cycle respectively. The enhanced degradation and mineralization efficiency of the 2CDT composite could be attributed to the excellent photosensitizer and electron reservoir properties of the CD along with upconverted photoluminescence behavior. The present study unlocks the possibility of using metal-free, facile CDT composite for effective degradation and mineralization of widely used beta blockers and other pharmaceuticals.
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Affiliation(s)
- Amruta Ponkshe
- Department of Environmental Sciences, Savitribai Phule Pune University, Ganeshkhind, Pune, 411007, India
| | - Pragati Thakur
- epartment of Chemistry, Savitribai Phule Pune University, Ganeshkhind, Pune , 411007, India.
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Bhattacharya S, Das AA, Chandra Dhal G, Sahoo PK, Tripathi A, Sahoo NK. Evaluation of N doped rGO-ZnO-CoPc(COOH) 8 nanocomposite in cyanide degradation and its bactericidal activities. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 302:114022. [PMID: 34735832 DOI: 10.1016/j.jenvman.2021.114022] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 09/25/2021] [Accepted: 10/25/2021] [Indexed: 06/13/2023]
Abstract
In the present study, an attempt has been made to design a solar light driven N-rGO-ZnO- CoPc(COOH)8 nanocomposite for the degradation of cyanide. The morphological and structural characterization of the synthesized nanocomposite was performed by XRD, FT-IR, XPS, UV-vis DRS, FESEM, TEM, EDS, PL spectra and BET surface area. The results revealed that almost 91% degradation and 86% toxicity removal occurred at 25 mgL-1 of initial cyanide concentration by the N-rGO-ZnO-CoPc(COOH)8 nanocomposite under illumination of solar light within 120 min. Analysis of free radicals reveals that the generation of OH. radicals was the predominant species in the photocatalytic degradation process. The cyanide degradation follows pseudo-first order kinetics. The estimated apparent rate constant (Kapp) of the above nanocomposite was 3 times higher than that of the ZnO photocatalyst alone together with a very good recycle activities. This might be due to the application of metallpthalocyanine photosensitizer CoPc(COOH)8 which enhances the rate of visible light absorption efficiency and activates the higher band gap ZnO photocatalyst under visible light. In addition, the presence of residual oxygen in N-rGO also promotes nucleation and anchor sites for interfacial contact between ZnO and N-rGO for effective charge transfer. Further, the N-rGO-ZnO-CoPc(COOH)8 photocatalytic system showed significant antibacterial activities against mixed culture systems. Therefore, the N-rGO-ZnO-CoPc(COOH)8 nanocomposite may be an alternative solar light driven photocatalyst system for the removal of cyanide from the wastewater along with its strong disinfectant activities.
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Affiliation(s)
- Shramana Bhattacharya
- Department of Chemistry, Environmental Science Program, Faculty of Engineering and Technology (ITER), Siksha'O'Anusandhan (Deemed to be University), Bhubaneswar, 751030, Odisha, India
| | - Anup Anang Das
- Department of Chemistry, Environmental Science Program, Faculty of Engineering and Technology (ITER), Siksha'O'Anusandhan (Deemed to be University), Bhubaneswar, 751030, Odisha, India
| | - Ganesh Chandra Dhal
- Department of Civil Engineering, National Institute of Technology, Meghalaya, India
| | - Prasanta Kumar Sahoo
- Department of Mechanical Engineering, Faculty of Engineering and Technology (ITER), Siksha'O'Anusandhan (Deemed to be University), Bhubaneswar, 751 030, Odisha, India
| | - Abhishek Tripathi
- Department of Metallurgical and Materials Engineering, Malaviya National Institute of Technology Jaipur, Jaipur, 302017, India
| | - Naresh Kumar Sahoo
- Department of Chemistry, Environmental Science Program, Faculty of Engineering and Technology (ITER), Siksha'O'Anusandhan (Deemed to be University), Bhubaneswar, 751030, Odisha, India.
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das Neves APN, Carlos TD, Bezerra LB, Alceno WD, Sarmento RA, de Souza NLGD, Pereira DH, Cavallini GS. Carbonate anion photolyzed by solar radiation or combined with peracetic acid to form reactive species for dye degradation. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113511] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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13
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Almansba A, Kane A, Nasrallah N, Wilson JM, Maachi R, Lamaa L, Peruchon L, Brochier C, Amrane A, Assadi AA. An engineering approach towards the design of an innovative compact photo-reactor for antibiotic removal in the frame of laboratory and pilot-plant scale. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113445] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Photocatalytic Treatment of Wastewater Containing Simultaneous Organic and Inorganic Pollution: Competition and Operating Parameters Effects. Catalysts 2021. [DOI: 10.3390/catal11070855] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
In the present study, methylene blue (MB) removal from aqueous solutions via the photocatalytic process using TiO2 as a catalyst in the presence of external ultra-violet light (UV) was investigated. The results of adsorption in the absence of UV radiation showed that adsorption reached an equilibrium state at 60 min. The experimental kinetic data were found to be well fitted by the pseudo-second-order model. Furthermore, the isotherm study suggested that dye uptake by TiO2 is a chemisorption process with a maximum retention capacity of 34.0 mg/g. The photodegradation of MB was then assessed under various experimental conditions. The related data showed that dye mineralization decreased when dye concentrations were increased and was favored at high pH values and low salt concentrations. The simultaneous presence of organic and inorganic pollution (Zinc) was also evaluated. The effect of the molar ratio Zn2+/MB+ in the solution at different pH values and NaCl concentrations was also monitored. The corresponding experimental results showed that at low values of Zn2+ in the solution (30 mg/L), the kinetic of the MB removal became faster until reaching an optimum at Zn2+/MB+ concentrations of 60/60 mg/L; it then slowed down for higher concentrations. The solutions’ carbon contents were measured during the degradation process and showed total mineralization after about 5 h for the optimal Zn2+/MB+ condition.
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Elangovan M, Bharathaiyengar SM, PonnanEttiyappan J. Photocatalytic degradation of diclofenac using TiO 2-CdS heterojunction catalysts under visible light irradiation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:18186-18200. [PMID: 33403641 DOI: 10.1007/s11356-020-11538-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Accepted: 11/03/2020] [Indexed: 06/12/2023]
Abstract
The present study reports the photocatalytic degradation of analgesic drug diclofenac using the hydrothermally prepared TiO2-CdS heterojunction catalyst. The results suggest that the prepared catalysts exhibited excellent photocatalytic activity under visible light irradiation. The photodegradation kinetics were well fitted to the pseudo-first-order reaction. The apparent reaction rate constant for TC5 catalyst in the diclofenac degradation was 0.02316 min-1. Mineralisation of diclofenac using TC5 photocatalyst was around 86% within 4 h of irradiation time. The operating parameters such as optimal catalyst dosage, apparent solution pH and the effect of initial diclofenac concentration were also studied using the TC5 catalyst. The role of active species in the degradation mechanism was elucidated and it was found that the hydroxyl radical is the main active species in the diclofenac degradation mechanism. The charge transfer between heterojunction catalysts is facilitated by direct Z-scheme heterojunction structure. The coupled photocatalysts also showed good photochemical stability and reusability over five successive reaction cycles. The tentative degradation pathway has been devised based on LC-MS peaks, and it is found that only m/z 224, m/z 178 and m/z 124 were persisted at the end of the reaction.
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Affiliation(s)
- Mugunthan Elangovan
- Department of Chemical Engineering, National Institute of Technology Karnataka, Surathkal, Mangalore, 575025, India
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Simultaneous removal of bacteria and volatile organic compounds on Cu2O-NPs decorated TiO2 nanotubes: Competition effect and kinetic studies. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112722] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Mansouri L, Jellali S, Akrout H. Recent advances on advanced oxidation process for sustainable water management. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:18939-18941. [PMID: 31148002 DOI: 10.1007/s11356-019-05210-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 04/15/2019] [Indexed: 06/09/2023]
Affiliation(s)
- Lobna Mansouri
- Wastewaters and Environment Laboratory, Centre for Water Research and Technologies, Technopark of Borj Cedria, Touristic Road of Soliman, BP 273, 8020, Soliman, Tunisia.
| | - Salah Jellali
- Wastewaters and Environment Laboratory, Centre for Water Research and Technologies, Technopark of Borj Cedria, Touristic Road of Soliman, BP 273, 8020, Soliman, Tunisia
| | - Hanene Akrout
- Wastewaters and Environment Laboratory, Centre for Water Research and Technologies, Technopark of Borj Cedria, Touristic Road of Soliman, BP 273, 8020, Soliman, Tunisia
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Loh JYY, Kherani NP. In Situ Electronic Probing of Photoconductive Trap States for the Catalytic Reduction of CO 2 by In 2O 3- xOH y Nanorods. J Phys Chem Lett 2019; 10:526-532. [PMID: 30653919 DOI: 10.1021/acs.jpclett.8b03433] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We use photoconductivity time, optical absorption, and electron quantum efficiency measurements under in situ reactant CO2 + H2 atmospheres to determine the role of surface trap states during photoreduction of CO2 to CO using In2O3- xOH y nanorods of varied annealing times. Photocurrent decay trends show an asymmetric energy distribution of surface barrier potentials with increased asymmetry from vacuum to CO2 + H2. Urbach analysis shows crystalline disorder parameters of 0.35-0.40 under vacuum and 0.45-0.6 under CO2 + H2. Quantum efficiency spectra show that under H2 + CO2 average tail state energies are similar to those under vacuum but with increased densities of photoconductive gap states. Photoelectro-paramagnetic-resonance measurements show the creation of new paramagnetic centers. Overall, enhanced activity is associated with a lower maximum barrier potential of 0.39 eV than that of 0.41 eV, lower average trap energies of 2.58 eV compared to 2.69 eV, with higher disorder due to increased surface state densities. These techniques pave the way for facile in situ probing of gas-phase photocatalysts, providing simple macrolevel understanding of adsorbed reactants on surface band bending, thus correlating to catalytic efficacy.
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Affiliation(s)
- Joel Y Y Loh
- Electrical and Computing Engineering , University of Toronto , Toronto , Ontario M5S 3G4 , Canada
| | - Nazir P Kherani
- Electrical and Computing Engineering , University of Toronto , Toronto , Ontario M5S 3G4 , Canada
- Material Science and Engineering , University of Toronto , Toronto , Ontario M5S 3E4 , Canada
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