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Kolhe ND, Walekar LS, Kadam AN, Kulkarni MA, Parbat HA, Misra M, Lokhande BJ, Lee SW, Patil V, Mhamane D, Mali MG. Facile construction of multifunctional xNiCo 2O 4/BiVO 4 heterojunction with accelerated charge transfer for efficient photocatalytic treatment of Cr (VI), MB and TC under visible light. CHEMOSPHERE 2024; 352:141353. [PMID: 38307337 DOI: 10.1016/j.chemosphere.2024.141353] [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: 06/15/2023] [Revised: 11/09/2023] [Accepted: 01/31/2024] [Indexed: 02/04/2024]
Abstract
The release of industrial effluents, comprising of organic dyes, antibiotics, and heavy metals poses substantial environmental and ecological threats. Among the different approaches, the utilization of heterogeneous photocatalysis based on semiconducting metal oxides is of paramount important to removal of organic ( MB dye and TC antibiotic) and inorganic pollutants ( Cr (VI) ) in wastewater. In this work, a new approach for creating type-II heterojunction photocatalysts named xNiCo2O4/BiVO4 or BNC is suggested. The as-prepared samples were thoroughly examined by means of several sophisticated analytical tools to investigate their physicochemical properties. These composites were utilized in the decomposition of MB dye, TC drug and the reduction of Cr (VI) under visible light irradiation. According to the findings, the creation of type-II heterojunction at BiVO4-NiCo2O4 interface greatly improved charge transportation while successfully preventing electron-hole recombination. Among the various composites studied, BNC-2 demonstrated an enhanced photocatalytic activity towards degradation of MB and TC, which were found to be 91 % over a period of 150 min and 95 % within only 60 min, respectively. Moreover, the photocatalytic reduction of Cr (VI) was accomplished 96 % within just 25 min. Additionally, it is discovered that BNC-2 displayed promising photostability and recyclability with a retention of >90 % after five consecutive cycles. The enhanced photocatalytic activity of BNC-2 is evidently attributed to the expedited separation and transfer of charges, as proven by photocurrent measurement, photoluminescence and electrochemical impedance spectroscopy analyses. Hence, the current amalgamation of NiCo2O4 and BiVO4 heterojunction composite has paved novel paths towards photocatalytic removal of organic as well as inorganic contaminants.
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Affiliation(s)
- Nagesh D Kolhe
- School of Chemical Sciences, Punyashlok Ahilyadevi Holkar Solapur University, Solapur, 413255, Maharashtra, India
| | - Laxman S Walekar
- School of Chemical Sciences, Punyashlok Ahilyadevi Holkar Solapur University, Solapur, 413255, Maharashtra, India
| | - Abhijit N Kadam
- Department of Chemistry, John Wilson Education Society's, Wilson College (Autonomous), Mumbai, Maharashtra, 400007, India; Department of Chemical and Biological Engineering, Gachon University-1342 Seongnamdaero, Sujeong-gu, Seongnam-si, 13120, South Korea
| | - Makarand A Kulkarni
- School of Chemical Sciences, Punyashlok Ahilyadevi Holkar Solapur University, Solapur, 413255, Maharashtra, India
| | - Harichandra A Parbat
- Department of Chemistry, John Wilson Education Society's, Wilson College (Autonomous), Mumbai, Maharashtra, 400007, India
| | - Mrinmoy Misra
- Department of Mechatronics Engineering, Manipal University Jaipur, Jaipur, India
| | - Balkrishna J Lokhande
- School of Physical Sciences, Punyashlok Ahilyadevi Holkar Solapur University, Solapur, 413 255, Maharashtra, India
| | - Sang-Wha Lee
- Department of Chemical and Biological Engineering, Gachon University-1342 Seongnamdaero, Sujeong-gu, Seongnam-si, 13120, South Korea
| | - Vaishali Patil
- Engineering and Applied Science Department, Vishwakarma Institute of Information Technology, Pune, Maharashtra, 411 048, India
| | - Dattakumar Mhamane
- Department of Chemistry, Sangameshwar College (Autonomous), Solapur, 413001, Maharashtra, India.
| | - Mukund G Mali
- School of Chemical Sciences, Punyashlok Ahilyadevi Holkar Solapur University, Solapur, 413255, Maharashtra, India.
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Chandra A, Ghosh S, Sarkar R, Sarkar S, Chattopadhyay KK. TiO 2 nanorods decorated Si nanowire hierarchical structures for UV light activated photocatalytic application. CHEMOSPHERE 2024; 352:141249. [PMID: 38266878 DOI: 10.1016/j.chemosphere.2024.141249] [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: 08/31/2023] [Revised: 01/09/2024] [Accepted: 01/16/2024] [Indexed: 01/26/2024]
Abstract
Water remediation techniques like photolysis have recently piqued the interest of many researchers due to water contamination resulting from heavy industrialization and urbanization. In the current work, as-synthesized TiO2 nanorod decorated vertically aligned silicon nanowire (SiNW) leads to a hierarchical morphological structure formation. The photocatalytic nature of the fabricated SiNW/TiO2 nanoheterojunction is examined by the dye degradation of textile pollutants like methylene blue (MB), rhodamine B (RhB), and eosin B (EB). The catalytic dye degradation investigations revealed that 4 h hydrothermal synthesis of TiO2 on the surface of SiNW (ST4) exhibited excellent catalytic behaviour. In the presence of H2O2 and UV irradiation, the ST4 nanoheterostructure can degrade 98.89% of the model pollutant methylene blue (MB) in 15 min, demonstrating remarkable photocatalytic performance. The direct Z-scheme heterojunction exhibited by the SiNW/TiO2 structure facilitates a more efficient charge transfer mechanism with higher reducing and oxidizing ability leading to enhanced photocatalytic behaviour. The degradation pathway examined by LC-MS studies demonstrated the complete breakdown of the organic MB dye molecules ultimately mineralizing into CO2, H2O, and other inorganic substances. The photocatalyst ST4 exhibited excellent reusability and stability after multiple cycles of dye degradation enabling its use in practical water purification purposes.
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Affiliation(s)
- Ankita Chandra
- School of Materials Science and Nanotechnology, Jadavpur University, Kolkata, 700032, India
| | - Shrabani Ghosh
- School of Materials Science and Nanotechnology, Jadavpur University, Kolkata, 700032, India
| | - Ratna Sarkar
- Thin film and Nano Science Laboratory, Department of Physics, Jadavpur University, Kolkata, 700032, India
| | - Sourav Sarkar
- School of Materials Science and Nanotechnology, Jadavpur University, Kolkata, 700032, India
| | - K K Chattopadhyay
- School of Materials Science and Nanotechnology, Jadavpur University, Kolkata, 700032, India; Thin film and Nano Science Laboratory, Department of Physics, Jadavpur University, Kolkata, 700032, India.
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3
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Garg A, Chauhan A, Agnihotri C, Singh BP, Mondem V, Basu S, Agnihotri S. Sunlight active cellulose/g-C 3N 4/TiO 2nano-photocatalyst for simultaneous degradation of methylene blue dye and atenolol drug in real wastewater. NANOTECHNOLOGY 2023; 34:505705. [PMID: 37708885 DOI: 10.1088/1361-6528/acf9ad] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Accepted: 09/13/2023] [Indexed: 09/16/2023]
Abstract
The paper critically addresses two contemporary environmental challenges, the water crisis and the unrestricted discharge of organic pollutants in waterways together. An eco-friendly method was used to fabricate a cellulose/g-C3N4/TiO2photocatalytic composite that displayed a remarkable degradation of methylene blue dye and atenolol drug under natural sunlight. Introducing graphitic carbon nitride (g-C3N4) onto pristine TiO2improved hybrid material's photonic efficacy and enhanced interfacial charge separation. Furthermore, immobilizing TiO2/g-C3N4on a semi-interpenetrating cellulose matrix promoted photocatalyst recovery and its reuse, ensuring practical affordability. Under optimized conditions, the nano-photocatalyst exhibited ∼95% degradation of both contaminants within two hours while retaining ∼55% activity after ten cycles demonstrating a promising photostability. The nano-photocatalyst caused 66% and 57% reduction in COD and TOC values in industrial wastewater containing these pollutants. The photocatalysis was fitted to various models to elucidate the degradation kinetics, while LC-MS results suggested the mineralization pathway of dye majorly via ring opening demethylation. >98% disinfection was achieved againstE. coli(104-105CFU·ml-1) contaminated water. This study thus paves multifaceted strategies to treat wastewater contaminants at environmental levels employing nano-photocatalysis.
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Affiliation(s)
- Anushka Garg
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Bhadson Road, Patiala 147004, Punjab, India
| | - Anjali Chauhan
- Department of Biotechnology, Thapar Institute of Engineering and Technology, Bhadson Road, Patiala 147004, Punjab, India
| | - Charu Agnihotri
- Department of Agriculture and Environmental Sciences, National Institute of Food Technology Entrepreneurship and Management, Kundli, Sonepat 131028, Haryana, India
| | - Bhim Pratap Singh
- Department of Agriculture and Environmental Sciences, National Institute of Food Technology Entrepreneurship and Management, Kundli, Sonepat 131028, Haryana, India
| | - Vasundhara Mondem
- Department of Biotechnology, Thapar Institute of Engineering and Technology, Bhadson Road, Patiala 147004, Punjab, India
| | - Soumen Basu
- School of Chemistry and Biochemistry, Thapar Institute of Engineering and Technology, Bhadson Road, Patiala 147004, Punjab, India
| | - Shekhar Agnihotri
- Department of Agriculture and Environmental Sciences, National Institute of Food Technology Entrepreneurship and Management, Kundli, Sonepat 131028, Haryana, India
- Centre for Advanced Translational Research in Food Nano-Biotechnology (CATR-FNB), National Institute of Food Technology Entrepreneurship and Management, Kundli, Sonepat-131028, Haryana, India
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4
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Quiton KGN, Huang YH, Lu MC. Photocatalytic oxidation of Reactive Red 195 by bimetallic Fe-Co catalyst: Statistical modeling and optimization via Box-Behnken design. CHEMOSPHERE 2023; 338:139509. [PMID: 37459934 DOI: 10.1016/j.chemosphere.2023.139509] [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: 02/09/2023] [Revised: 07/05/2023] [Accepted: 07/13/2023] [Indexed: 07/21/2023]
Abstract
Response surface methodology (RSM) is an effective tool for process optimization with multi-complex operational factors. The present work aims to model and optimize the photocatalytic oxidation (PCO) parameters of Reactive Red 195 (RR195) dye decoloration with the SiO2-supported Fe-Co catalyst (FCS) derived from a novel catalyst synthesis method, fluidized-bed crystallization (FBC) process, using Box-Behnken design (BBD) as the RSM statistical model. The Fe-Co@SiO2 catalyst was successfully fabricated using the FBC process, and it showed good catalytic activity and performance toward the degradation of RR195. The extent of the effects of pH, H2O2 dosage (HD), catalyst loading (CL), and operating time (t) on the decoloration of RR195 was studied. Hence, the order of variable significance follows the sequence: pH > t > CL > HD. pH has the most significant effect among the variables for RR195 decoloration. The decoloration efficiency predicted by the BBD model was 88.3% under the optimized operation conditions of initial pH of 3.15, 0.76 mM H2O2, 1.18 g L-1 FCS and 59.4 min of operating time. The actual decoloration efficiency was very close to the predicted value indicating that BBD can efficiently be utilized to optimize RR195 degradation with FCS under the PCO system.
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Affiliation(s)
- Khyle Glainmer N Quiton
- School of Chemical, Biological, and Materials Engineering and Sciences, Mapúa University, Intramuros, Manila, 1002, Philippines; Department of Chemical Engineering, National Cheng Kung University, Tainan, 701, Taiwan
| | - Yao-Hui Huang
- Department of Chemical Engineering, National Cheng Kung University, Tainan, 701, Taiwan.
| | - Ming-Chun Lu
- Department of Environmental Engineering, National Chung Hsing University, Taichung, 40227, Taiwan.
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5
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Yang W, Xu C, Lyu Y, Lan Z, Li J, Ng DHL. Hierarchical hollow α-Fe 2O 3/ZnFe 2O 4/Mn 2O 3 Janus micromotors as dynamic and efficient microcleaners for enhanced photo-Fenton elimination of organic pollutants. CHEMOSPHERE 2023; 338:139530. [PMID: 37459924 DOI: 10.1016/j.chemosphere.2023.139530] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Revised: 06/16/2023] [Accepted: 07/14/2023] [Indexed: 07/21/2023]
Abstract
Micro/nanomotors that can promote mass transport have attracted more and more research concern in the photocatalysis field. Here we first report a newly-designed hierarchical α-Fe2O3/ZnFe2O4/Mn2O3 magnetic micromotor as a heterogeneous photocatalyst for the degradation of cationic dye methylene blue (MB) from wastewater. The resulting three-dimensional (3D) flower-like hollow Janus micromotors are fabricated through a green and scalable strategy, in which each component has different functions. ZnFe2O4 microspheres serve as a magnetic scaffold for the nucleation and growth of α-Fe2O3 nanosheets and for the recycling of the micromachine. α-Fe2O3 nanosheets have shown great potential as an ideal semiconductor material for the photocatalytic decontamination of pollutants. Mn2O3 nanoparticles are mainly utilized as a catalyst to produce O2 bubbles to propel the autonomic movement of the micromotors in the presence of H2O2 fuel and also as a Fenton-like catalyst to decompose H2O2 to generate reactive oxygen species. Furthermore, the resultant micromotors exhibited linear-like motion form with an average speed of 189.1 μm s-1 in 5 wt% H2O2 solution. Moreover, the self-driven micromotors exhibited a superior catalytic degradation property toward MB, which was attributed to the synergistic effect of heterogeneous photocatalyst and the boosted micro-mixing and mass transfer caused by the vigorous motion of the micro-actuator. The possible degradation intermediates and passways of MB by α-Fe2O3/ZnFe2O4/Mn2O3 micromotor were identified with time of flight mass spectroscopy (TOF-MS). The 3D Janus micromotors have the potential to be used as a high-efficiency and active heterogeneous photocatalyst for the degradation of organic pollutants.
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Affiliation(s)
- Wenning Yang
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, PR China; School of Material Science and Engineering, University of Jinan, Jinan, PR China
| | - Chaochao Xu
- School of Material Science and Engineering, University of Jinan, Jinan, PR China
| | - Yangsai Lyu
- Department of Mathematics and Statistics, Queen's University, Kingston, K7L 3N6, Canada
| | - Ziwei Lan
- School of Material Science and Engineering, University of Jinan, Jinan, PR China
| | - Jia Li
- School of Material Science and Engineering, University of Jinan, Jinan, PR China.
| | - Dickon H L Ng
- School of Science and Engineering, The Chinese University of Hong Kong (Shenzhen), Shenzhen, PR China
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6
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Shi G, Zeng S, Liu Y, Xiang J, Deng D, Wu C, Teng Q, Yang H. Efficient heterogeneous Fenton-like degradation of methylene blue using green synthesized yeast supported iron nanoparticles. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 263:115240. [PMID: 37441945 DOI: 10.1016/j.ecoenv.2023.115240] [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: 04/05/2023] [Revised: 06/25/2023] [Accepted: 07/05/2023] [Indexed: 07/15/2023]
Abstract
To reduce the consumption of oxidant and catalyst in Fenton-like reaction and to realize the reuse of catalyst, yeast supported iron nanoparticles (nZVI@SCM) was synthesized by tobacco leaf extract and applied in the heterogeneous Fenton-like degradation of aqueous methylene blue (MB) at ambient conditions. The performance of the composite was exploited in terms of catalytic activity and factors influencing MB degradation. The surface changes of nZVI@SCM before and after reaction were characterized by XPS, SEM, FT-IR and XRD. Iron leaching, primary reactive oxidizing species, and the storage stability and reusability of catalyst were also investigated. Typically, 99.7% removal of 50 mg/L MB, with a TOC removal of 97.2%, could be achieved within 10 h by 0.1 g/L nZVI@SCM coupled with 1.0 mM H2O2. The MB degradation is in good agreement with the pseudo-first-order model, and hydroxyl radicals in the bulk solution is the main reactive oxidizing species responsible for MB degradation. Based on the identified intermediates by liquid chromatography/mass spectrometry, the possible MB degradation mechanism in the nZVI@SCM/H2O2 system is discussed. The developed high-performance nZVI@SCM catalyst strategy can provide a new route in enhancing the Fenton-like degradation of organic contaminants with less consumption of catalyst and oxidant.
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Affiliation(s)
- Guorong Shi
- School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China; College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China.
| | - Shuangqing Zeng
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Yefeng Liu
- School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China
| | - Jun Xiang
- Hunan Wenpu Detection Technology Research Co., Ltd, Changsha 410001, China
| | - Dale Deng
- School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China
| | - Chenmeng Wu
- College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China
| | - Qian Teng
- School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China
| | - Hua Yang
- School of Biological Science and Technology, Hunan Agricultural University, Changsha 410128, China.
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7
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Mi Y, Zhang S, Zhao Y, Sun G, Cao Z. Pyrrolic N and Persistent Free Radical Synergistically Promote Catalytic Degradation of Dyes via Fe2O3/Activated Biochar Derived from Taihu Blue Algae. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.131393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2023]
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8
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Djeghader I, Bendebane F, Ismail F. Interaction Effect of Operating Parameters during Oxidation of Different Dyes via the Fenton Process. Application of the Plackett-Burmann Design. CHEMISTRY & CHEMICAL TECHNOLOGY 2023. [DOI: 10.23939/chcht17.01.154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
Abstract
The interaction effect of eight operating factors on the degradation of three organic dyes of different structures (Cibacron green, methylene blue and methyl orange) has been studied. Effect had been evaluated statistically using the Plackett-Burman screening design which ex-tracted valuable information on the most important parameters and their interactions. The goodness of the model fit was checked by the determination of the coefficient R2. The process factors, which affected the degradation efficiency of dyes, were then analyzed and illustrated; the most important valueі (p and F) for three dyes proved the validity of the model. The results of interactions between the factors allow to understand and study the impact of each parameter on the elimination of dyes and to distinguish the key factor to upgrade the efficiency of the Fenton process.
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9
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Hydrogel/β-FeOOH-Coated Poly(vinylidene fluoride) Membranes with Superhydrophilicity/Underwater Superoleophobicity Facilely Fabricated via an Aqueous Approach for Multifunctional Applications. Polymers (Basel) 2023; 15:polym15040839. [PMID: 36850123 PMCID: PMC9961681 DOI: 10.3390/polym15040839] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 12/11/2022] [Accepted: 12/15/2022] [Indexed: 02/11/2023] Open
Abstract
Hydrogel coatings that can endow various substrates with superior properties (e.g., biocompatibility, hydrophilicity, and lubricity) have wide applications in the fields of oil/water separation, antifouling, anti-bioadhesion, etc. Currently, the engineering of multifunctional hydrogel-coated materials with superwettability and water purification property using a simple and sustainable strategy is still largely uninvestigated but has a beneficial effect on the world. Herein, we successfully prepared poly(2-acrylamido-2-methyl-1-propanesulfonic acid) hydrogel/β-FeOOH-coated poly(vinylidene fluoride) (PVDF/PAMPS/β-FeOOH) membrane through free-radical polymerization and the in situ mineralization process. In this work, owing to the combination of hydrophilic PAMPS hydrogel coating and β-FeOOH nanorods anchored onto PVDF membrane, the resultant PVDF/PAMPS/β-FeOOH membrane achieved outstanding superhydrophilicity/underwater superoleophobicity. Moreover, the membrane not only effectively separated surfactant-stabilized oil/water emulsions, but also possessed a long-term use capacity. In addition, excellent photocatalytic activity against organic pollutants was demonstrated so that the PVDF/PAMPS/β-FeOOH membrane could be utilized to deal with wastewater. It is envisioned that these hydrogel/β-FeOOH-coated PVDF membranes have versatile applications in the fields of oil/water separation and wastewater purification.
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10
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Synthesis, characterization, and in-situ H2O2 generation activity of Activated Carbon/Goethite/Fe3O4/ZnO for heterogeneous electro-Fenton degradation of organics from woolen textile wastewater. J IND ENG CHEM 2023. [DOI: 10.1016/j.jiec.2023.02.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
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11
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Activated Carbon Assisted Fenton-like Treatment of Wastewater Containing Acid Red G. Catalysts 2022. [DOI: 10.3390/catal12111358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The Fenton reaction as an effective advanced oxidation technology has been widely used in wastewater treatment for its stable effluent quality, simple operation, mild condition, and higher organic degradation with non-selectivity. However, the traditional Fenton reaction is limited by the sluggish regeneration of Fe2+, resulting in a slower reaction rate, and it is necessary to further increase the dosage of Fe2+, which will increase the production of iron sludge. Activated carbon (AC) has a strong adsorption property, and it cannot be ignored that it also can reduce Fe3+. In this study, the degradation of acid red G (ARG) by adding AC to the Fe3+/H2O2 system, the role of the reducing ability, and the reason why AC can reduce Fe3+ were studied. By adding three kinds of ACs, including coconut shell-activated carbon (CSPAC), wood-activated carbon (WPAC), and coal-activated carbon (CPAC), the ability of ACs to assist the Fe3+/H2O2 Fenton-like system to degrade ARG was clarified. Through the final treatment effect and the ability to reduce Fe3+, the type of AC with the best promotion effect was CSPAC. The different influence factors of particle size, the concentration of CSPAC, concentration of H2O2, concentration of Fe3+, and pH value were further observed. The best reaction conditions were determined as CSPAC powder with a particle size of 75 μm and dosage of 0.6 g/L, initial H2O2 concentration of 0.4 mmol/L, Fe3+ concentration of 0.1 mmol/L, and pH = 3. By reducing the adsorption effect of CSPAC, it was further observed that CSPAC could accelerate the early reaction rate of the degradation process of ARG by the Fe3+/H2O2 system. FT-IR and XPS confirmed that the C-O-H group on the surface of CSPAC could reduce Fe3+ to Fe2+. This study can improve the understanding and role of AC in the Fenton reaction, and further promote the application of the Fenton reaction in sewage treatment.
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12
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Deng R, Xia XZ, Han JC, Wu QY, Yang HC. Siphon-driven interfacial photocatalytic reactors enhanced by capillary flow for continuous wastewater treatment. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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13
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Desseigne M, Madigou V, Coulet MV, Heintz O, Chevallier V, Arab M. Au/WO3 nanocomposite based photocatalyst for enhanced solar photocatalytic activity. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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14
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Li W, Ye Q, Xia T, Zhao L, Yang M. Degradation of Organic Dyes Using the Ionizing Irradiation Process in the Presence of the CN/CD 3/Fe 6 Composite: Mechanistic Studies. ACS OMEGA 2022; 7:21418-21432. [PMID: 35785285 PMCID: PMC9244913 DOI: 10.1021/acsomega.2c00512] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 05/30/2022] [Indexed: 06/15/2023]
Abstract
Organic dyes are ubiquitous pollutants in various aquatic environments as they are produced in abundance and used widely. In the present work, the degradation and mineralization of various organic dyes such as methylene blue (MB), methyl orange (MO), and rhodamine B (RhB), following the electron beam irradiation method in the presence of a graphitic carbon nitride/carbon nanodots/Fe(II) (CN/CD3/Fe6) composite, were studied. The removal efficiency of MB reached 81.7% under conditions of electron beam irradiation (EBI) when the total irradiation dose was 5 kGy. This increased to 91.2% in the presence of the CN/CD3/Fe6 composite. The mineralization efficiency increased from 30.1 to 47.3% when the composite was added, and the total irradiation dose was 20 kGy. The removal efficiency of organic dyes was not significantly affected in the pH range of 3-11. Results from cyclic experiments conducted using MB degradation indicated that the CN/CD3/Fe6 composite exhibited good stability and reusability even after five irradiation cycles. Results from scavenging experiments revealed that •OH was the predominant reactive species during the MB degradation process. Intermediates produced in the synergistic system (EBI&CN/CD3/Fe6 system) consisting of the CN/CD3/Fe6 composite and EBI were detected using the liquid chromatography-mass spectrometry (LC-MS) technique. Based on the results, the possible degradation mechanism and pathways for MB were proposed.
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Affiliation(s)
- Wen Li
- School
of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, China
| | - Qi Ye
- State
Key Laboratory of Advanced Electromagnetic Engineering and Technology,
School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Tao Xia
- School
of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, China
| | - Long Zhao
- State
Key Laboratory of Advanced Electromagnetic Engineering and Technology,
School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Miao Yang
- School
of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, China
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15
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Yu YY, Quan WZ, Cao Y, Niu Q, Lu Y, Xiao X, Cheng L. Boosting the singlet oxygen production from H 2O 2 activation with highly dispersed Co-N-graphene for pollutant removal. RSC Adv 2022; 12:17864-17872. [PMID: 35765340 PMCID: PMC9201703 DOI: 10.1039/d2ra02491h] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 05/23/2022] [Indexed: 01/18/2023] Open
Abstract
Singlet oxygen (1O2) is a promising reactive species for the selective degradation of organic pollutants. However, it is difficult to generate 1O2 from H2O2 activation with high efficiency and selectivity. In this work, a graphene-supported highly dispersed cobalt catalyst with abundant Co-N x active sites (Co-N-graphene) was synthesized for activating H2O2. The Co-N-graphene catalyzed H2O2 reaction system selectively catalyzed 1O2 production associated with the superoxide radical (O2˙-) as the critical intermediate, as proven by scavenger experiments, electron spin resonance (ESR) spin trapping and a kinetic solvent isotope effect study. This resulted in excellent degradation efficiency towards the model organic pollutant methylene blue (MB), with an outstanding pseudo-first-order kinetic rate constant of 0.432 min-1 (g Lcatalyst -1)-1 under optimal reaction conditions (C H2O2 = 400 mM, initial pH = 9). Furthermore, this Co-N-graphene catalyst enabled strong synergy with HCO3 - in accelerating MB degradation, whereas the scavenger experiment implied that the synergy herein differed significantly from the current Co2+-HCO3 - reaction system, in which contribution of O2˙- was only validated with a Co-N-graphene catalyst. Therefore, this work developed a novel catalyst for boosting 1O2 production from H2O2 activation and will extend the inventory of catalysts for advanced oxidation processes.
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Affiliation(s)
- Yang-Yang Yu
- School of the Environment and Safety Engineering, Jiangsu University 301 Xuefu Road Zhenjiang 212013 China .,Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University Hefei 230601 China
| | - Wen-Zhu Quan
- School of the Environment and Safety Engineering, Jiangsu University 301 Xuefu Road Zhenjiang 212013 China
| | - Yuanyuan Cao
- Institute of Medicine & Chemical Engineering, Zhenjiang College Zhenjiang 212000 China
| | - Qijian Niu
- Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, School of Agricultural Equipment Engineering, Institute of Agricultural Engineering, Jiangsu University Zhenjiang Jiangsu 212013 China
| | - Yilin Lu
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University Hefei 230601 China
| | - Xiang Xiao
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University Hefei 230601 China
| | - Liang Cheng
- School of the Environment and Safety Engineering, Jiangsu University 301 Xuefu Road Zhenjiang 212013 China .,Institute of Environmental Health and Ecological Security, School of the Environment and Safety Engineering, Jiangsu University 301 Xuefu Road Zhenjiang 212013 China
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16
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Guo Q, Song H, Sun M, Yuan X, Su Y, Lv Y. Co 3O 4 modified polymeric carbon nitride for external light-free chlorine activating degradation of organic pollutants. JOURNAL OF HAZARDOUS MATERIALS 2022; 429:128193. [PMID: 35086034 DOI: 10.1016/j.jhazmat.2021.128193] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 12/14/2021] [Accepted: 12/29/2021] [Indexed: 06/14/2023]
Abstract
Advanced oxidation processes (AOPs) activated by chlorine have emerged as a green and efficient strategy for water treatment and have attracted widespread attention. However, most of them require continuous UV radiation during the degradation reaction, which increases the cost and is not conducive to practical application, in some ways. Hererin we proposed an external light-free chlorine activation methodology for the removal of organic pollutants with the assistance of the intrinsic chemiluminescence (CL) in the system. A very interesting phenomenon, 20-fold enhanced CL of Co3O4 nanoparticles modified polymeric carbon nitride (PCN/Co3O4) was observed in the presence of hypochlorous acid (HClO), compared with the pristine PCN nanosheets. Without ultraviolet (UV), even any other light-emitting devices, the strong intrinsic CL in the PCN/Co3O4-HClO system was found to be conducive to chlorine activation degradation of organic pollutants. The inner connection between the CL of the PCN/Co3O4-HClO system and the chlorine-based AOPs was further explored.
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Affiliation(s)
- Qi Guo
- Analytical & Testing Center, Sichuan University, Chengdu 610064, China
| | - Hongjie Song
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Mingxia Sun
- Analytical & Testing Center, Sichuan University, Chengdu 610064, China
| | - Xiaohan Yuan
- Analytical & Testing Center, Sichuan University, Chengdu 610064, China
| | - Yingying Su
- Analytical & Testing Center, Sichuan University, Chengdu 610064, China.
| | - Yi Lv
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
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17
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Cechinel MAP, de Oliveira Guidolin T, da Silveira AR, Dos Santos Tasca J, Montedo ORK, Arcaro S. Coal mining pyritic waste in Fenton-like processes: Raw and purified catalysts in Reactive Blue 21 dye discoloration. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 807:150823. [PMID: 34627925 DOI: 10.1016/j.scitotenv.2021.150823] [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: 08/15/2021] [Revised: 09/30/2021] [Accepted: 10/01/2021] [Indexed: 06/13/2023]
Abstract
Raw pyritic waste (RPW) from South Brazilian coal deposits and pure pyritic waste (PPW) were used as catalysts for organic dyes discoloration. Samples were characterized for their chemical, morphological, and structural properties. There was a significant content of Fe and S in both samples from the presence of iron sulfide. The average particle size is 10.9 μm for RPW and 7.4 μm for PPW, demonstrating that the beneficiation process could remove the larger quartz particles, interfered in the distribution, and average particle size. Smaller particle sizes promoted a larger surface area for the PPW. The influence of the pyritic waste in dosage, H2O2 concentration, and pH was evaluated, obtaining discoloration values above 95% for 0.5 g/L of pyritic waste, 2 g/L of H2O2, and pH 4.3 for both pyritic wastes. The degradation kinetics of the Reactive Blue 21 using the raw pyritic waste obtained a dye concentration removal above 93% in 90 min, with an iron release of 5.4 mg/L into the solution. Using PPW, the dye concentration removal was over 92% in 40 min, with the iron release of 15.5 mg/L into the solution. Discoloration rate for the PPW sample is 7 times greater than the rate obtained for RPW, indicating a faster decay rate for the purified sample. A decrease in discoloration efficiency is observed for PPW after 6 cycles of use, due to the higher concentration of iron leached into the medium. From the results, it was concluded that the raw pyritic waste has excellent potential for use as a catalyst for Fenton reaction, especially for dye-containing water discoloration, thus demonstrating the excellent applicability potential of pyritc waste in the degradation of organic pollutants in wastewater.
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Affiliation(s)
- Maria Alice P Cechinel
- Department of Chemical Engineering, Universidade do Extremo Sul Catarinense, Brazil; Laboratório de Cerâmica Técnica (CerTec), Programa de Pós-graduação em Ciência e Engenharia de Materiais, Universidade do Extremo Sul Catarinense, Brazil; Grupo de Biomateriais e Materiais Nanoestruturados, Programa de Pós-Graduação em Ciência e Engenharia de Materiais (PPGCEM), Universidade do Extremo Sul Catarinense, Av. Universitária 1105, Criciúma 88806-000, Brazil.
| | - Thays de Oliveira Guidolin
- Department of Chemical Engineering, Universidade do Extremo Sul Catarinense, Brazil; Laboratório de Cerâmica Técnica (CerTec), Programa de Pós-graduação em Ciência e Engenharia de Materiais, Universidade do Extremo Sul Catarinense, Brazil
| | - Andresa Rodrigues da Silveira
- Department of Chemical Engineering, Federal University of Santa Catarina, PO Box 476, CEP 88040-900 Florianópolis, SC, Brazil
| | | | - Oscar Rubem Klegues Montedo
- Laboratório de Cerâmica Técnica (CerTec), Programa de Pós-graduação em Ciência e Engenharia de Materiais, Universidade do Extremo Sul Catarinense, Brazil; Grupo de Biomateriais e Materiais Nanoestruturados, Programa de Pós-Graduação em Ciência e Engenharia de Materiais (PPGCEM), Universidade do Extremo Sul Catarinense, Av. Universitária 1105, Criciúma 88806-000, Brazil
| | - Sabrina Arcaro
- Laboratório de Cerâmica Técnica (CerTec), Programa de Pós-graduação em Ciência e Engenharia de Materiais, Universidade do Extremo Sul Catarinense, Brazil; Grupo de Biomateriais e Materiais Nanoestruturados, Programa de Pós-Graduação em Ciência e Engenharia de Materiais (PPGCEM), Universidade do Extremo Sul Catarinense, Av. Universitária 1105, Criciúma 88806-000, Brazil
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18
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Nabilah B, Purnomo AS, Rizqi HD, Putro HS, Nawfa R. The effect of Ralstonia pickettii bacterium addition on methylene blue dye biodecolorization by brown-rot fungus Daedalea dickinsii. Heliyon 2022; 8:e08963. [PMID: 35243083 PMCID: PMC8860926 DOI: 10.1016/j.heliyon.2022.e08963] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2021] [Revised: 01/10/2022] [Accepted: 02/10/2022] [Indexed: 10/31/2022] Open
Abstract
Methylene blue (MB) is one of synthetic dyes that is used in the textile industry which is difficult to degrade in nature. Previously, the brown-rot fungus (BRF) Daedalea dickinsii had shown a good ability to degrade MB, however, the decolorization ability was relatively still low and had a long period of incubation. Therefore, improvement of process is needed to increase the ability of D. dickinsii to decolorize MB. In this study, the effect of Ralstonia pickettii bacterium addition on MB biodecolorization by the BRF D. dickinsii in potato dextrose broth (PDB) medium was investigated. The amount of R. picketti that was added to the culture of D. dickinsii were 2, 4, 6, 8, and 10 mL (1 mL ≈ 1.39 × 108 CFU). The cultures had ability to decolorize MB (100 mg/L) at 30 °C after 7 days incubation. The highest percentage of MB biodecolorization was obtained at addition of 10 mL of R. pickettii approximately 89%, while biodecolorization process by particularly D. dickinsii was approximately 17%. The MB degradation metabolites by mixed cultures of D. dickinsii and 10 mL of R. pickettii were Azure A, thionine, glucose-MB, C12H11N3SO6 and C12H13N3O6. This study indicated that the addition of R. pickettii could enhance MB biodecolorization by fungus D. dickinsii. Besides that, this study also indicated that mixed cultures of D. dickinsii and R. pickettii has great potential for high efficiency, fast and cheap dye wastewater treatment.
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19
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Austenitic Stainless Steel as a Catalyst Material for Photo-Fenton Degradation of Organic Dyes. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12031008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
In this paper, a typical austenitic stainless steel was used as a catalyst in the visible photo-Fenton degradation process of two model dyes, methylene blue and methylorange, in the presence of hydrogen peroxide and potassium persulfate as free radical-generating species. The concentration intervals for both peroxide and persulfate were in the range of 333–1667 μg/L. Very high photodecoloration efficiencies have been achieved using peroxide (>93%), while moderate ones have been achieved using persulfate (>75%) at a pH value of 6.5. For methylene blue, the maximum mineralization yield of 74.5% was achieved using 1665 μg/L of hydrogen peroxide, while methylorange was better mineralized using 999 μg/L of persulfate. The photodegradation of the dye occurred in two distinct steps, which were successfully modeled by the Langmuir–Hinshelwood pseudo-first-order kinetic model. Reaction rate constants k between 0.1 and 4.05 h−1 were observed, comparable to those presented in the reference literature at lower pH values and higher concentrations of total iron from the aqueous media.
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20
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Li C, Shi M, Xu D, Liao Q, Liu G, Guo Y, Zhang H, Zhu H. Fabrication of photo-Fenton self-cleaning PVDF composite membrane for highly efficient oil-in-water emulsion separation. RSC Adv 2022; 12:35543-35555. [DOI: 10.1039/d2ra07116a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 12/01/2022] [Indexed: 12/15/2022] Open
Abstract
The anti-fouling performance of membranes is an important performance in the separation of oil/water.
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Affiliation(s)
- Chengcai Li
- Zhejiang Provincial Key Laboratory of Fiber Materials and Manufacturing Technology, Zhejiang Sci-Tech University, Hangzhou, 310018, China
- Zhejiang Sci-Tech University Huzhou Research Institute Co., Ltd, Huzhou 313000, China
| | - Minghui Shi
- Zhejiang Provincial Key Laboratory of Fiber Materials and Manufacturing Technology, Zhejiang Sci-Tech University, Hangzhou, 310018, China
| | - Dan Xu
- Zhejiang Provincial Key Laboratory of Fiber Materials and Manufacturing Technology, Zhejiang Sci-Tech University, Hangzhou, 310018, China
| | - Qiqi Liao
- Zhejiang Provincial Key Laboratory of Fiber Materials and Manufacturing Technology, Zhejiang Sci-Tech University, Hangzhou, 310018, China
| | - Guojin Liu
- Zhejiang Provincial Key Laboratory of Fiber Materials and Manufacturing Technology, Zhejiang Sci-Tech University, Hangzhou, 310018, China
- Zhejiang Provincial Innovation Center of Advanced Textile Technology, Shaoxing, 312000, China
| | - Yuhai Guo
- Zhejiang Provincial Key Laboratory of Fiber Materials and Manufacturing Technology, Zhejiang Sci-Tech University, Hangzhou, 310018, China
- Zhejiang Sci-Tech University Huzhou Research Institute Co., Ltd, Huzhou 313000, China
| | - Hang Zhang
- Zhejiang E. O. Paton Welding Technology Research Institute, Hangzhou 311200, China
| | - Hailin Zhu
- Zhejiang Provincial Key Laboratory of Fiber Materials and Manufacturing Technology, Zhejiang Sci-Tech University, Hangzhou, 310018, China
- Zhejiang Sci-Tech University Huzhou Research Institute Co., Ltd, Huzhou 313000, China
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21
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Shi S, Han X, Liu J, Lan X, Feng J, Li Y, Zhang W, Wang J. Photothermal-boosted effect of binary CuFe bimetallic magnetic MOF heterojunction for high-performance photo-Fenton degradation of organic pollutants. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 795:148883. [PMID: 34252775 DOI: 10.1016/j.scitotenv.2021.148883] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 07/02/2021] [Accepted: 07/03/2021] [Indexed: 06/13/2023]
Abstract
Overcoming the relatively low catalytic activity and strict acid pH condition of common photo-Fenton reaction is the key to alleviate the serious global burden caused by common organic pollutants. Herein, a binary homologous bimetallic heterojunction of magnetic CuFe2O4@MIL-100(Fe, Cu) metal-organic frameworks (MCuFe MOF) with photothermal-boosted photo-Fenton activity is constructed as an ideal practical photo-Fenton catalyst for the degradation of organic pollutants. Through an in-situ derivation strategy, the formed homologous bimetallic heterojunction with binary redox couples can simultaneously improve the visible light harvesting capacity and expedite the separation and transfer of photogenerated electrons/holes pairs, leading to the continuous and rapid circulation of both FeIII/FeII and CuII/CuI redox couples. Notably, the heterojunction shows intrinsic photo-thermal conversion effect, which is found to be beneficial to boost the photo-Fenton activity. Impressively, MCuFe MOF shows remarkable catalytic performance towards the degradation of various organic pollutants by comprehensively increasing H2O2 decomposition efficiency and decreasing the required dosage of MCuFe MOF (0.05 g L-1) with a wide pH range (3.0-10.0). As such, a photo-Fenton catalyst consisting of binary homologous bimetallic heterojunction is first disclosed, as well as its photothermal-enhanced effect, which is expected to drive great advance in the degradation of organic pollutants for practical applications.
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Affiliation(s)
- Shuo Shi
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, PR China
| | - Ximei Han
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, PR China
| | - Jie Liu
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, PR China
| | - Xi Lan
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, PR China
| | - Jianxing Feng
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, PR China
| | - Yuchen Li
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, PR China
| | - Wentao Zhang
- 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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22
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Liu L, Chen WT, Kihara S, Kilmartin PA. Green synthesis of akaganéite (β-FeOOH) nanocomposites as peroxidase-mimics and application for discoloration of methylene blue. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 296:113163. [PMID: 34229137 DOI: 10.1016/j.jenvman.2021.113163] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 06/08/2021] [Accepted: 06/24/2021] [Indexed: 06/13/2023]
Abstract
This work reports an environmentally benign and readily scalable process for production of akaganéite (β-FeOOH) nanocomposites by using abundant gallic acid or grape seed tannins and urea. Influences from those phytochemicals on the properties of β-FeOOH nanocomposites were investigated by X-ray powder diffraction, Fourier transform infrared spectroscopy, Thermogravimetric analysis, Scanning electron microscopy, Transmission electron microscopy, UV-Vis spectroscopy and Photoluminescence. The addition of 0.1% (w/v) grape seed tannins or gallic acid (640 mg L-1) solution yielded single-crystalline β-FeOOH nanocomposites with reduced dimensions, increased porosities and BET surface area, and no oxidized impurities such as hematite (Fe2O3) were formed. The added grape seed tannins (S0.8) or gallic acid together with less urea (0.8 M) produced β-FeOOH nanocomposites with higher activities as peroxidase mimics compared to those prepared with only urea (C0.8). Moreover, S0.8 was more efficient in methylene blue (MB) discoloration compared to C0.8 at all three pH values of 4, 7 and 11, and the S0.8-mediated MB degradation pathways at pH 4 and 7 were different from those at pH 11 due to the generation of different predominant oxidants. The overall MB discoloration efficacies by S0.8 at pH 4, 7 and 11 were combinative effects of both physical adsorption and chemical reactions. These β-FeOOH nanocomposites possess great potential as peroxidase mimics for facile monitoring of excess hydrogen peroxide and applications in environmental remediation.
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Affiliation(s)
- Lingdai Liu
- School of Chemical Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Wan-Ting Chen
- School of Chemical Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand
| | - Shinji Kihara
- School of Chemical Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand; The MacDiarmid Institute for Advanced Materials and Nanotechnology, Wellington 6140, New Zealand
| | - Paul A Kilmartin
- School of Chemical Sciences, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand.
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23
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Zhang Y, Wang Y, Zhang X, Wu L, Wang H, Wei X, Wu WD, Wang X, Li W, Wu Z. Microdroplet confined assembly enabling the scalable synthesis of titania supported ultrasmall low-valent copper catalysts for efficient photocatalytic activation of peroxymonosulfate. NANOSCALE 2021; 13:13764-13775. [PMID: 34477651 DOI: 10.1039/d1nr03535e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The synthesis of highly dispersed low-valent copper catalysts is very challenging because they are prone to oxidation and sintering. Herein, scalable synthesis of ultrafine Cu(0)/Cu(i) catalysts supported on mesoporous titania microspheres is enabled by a one-step microdroplet confined assembly method. The extremely fast solute assembly in the microdroplet induces excellent metal precursor dispersion, reduces sol-gel crosslinking, and creates wrinkled microspheres with surface crusts and hollow cavities. This structural architecture allows the generation of an inner reductive gas environment during calcination in air to reduce Cu(ii) and create oxygen vacancy (OV) sites in titania. The obtained catalysts exhibit excellent performance in the photocatalytic activation of peroxymonosulfate (PMS) for pollutant degradation. The Cu(0) species with a surface plasmon resonance effect and OV-rich anatase facilitate efficient solar light utilization and charge separation. The intimate interface between Cu(i)/Cu(0) and anatase enables fast electron transfer and timely copper redox cycling to promote the activation of PMS.
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Affiliation(s)
- Yi Zhang
- Particle Engineering Laboratory, School of Chemical and Environmental Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, China.
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Yu H, Liu G, Dong B, Jin R, Zhou J. Synergistic catalytic Fenton-like degradation of sulfanilamide by biosynthesized goethite-reduced graphene oxide composite. JOURNAL OF HAZARDOUS MATERIALS 2021; 415:125704. [PMID: 33773243 DOI: 10.1016/j.jhazmat.2021.125704] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 03/04/2021] [Accepted: 03/18/2021] [Indexed: 06/12/2023]
Abstract
A series of goethite (Gt)-graphene (rGO) composites (Gt-rGO) having different rGO contents (2%-10%) was biologically prepared under mild conditions with Acidovorax sp. BoFeN1 and exhibited comparable or even higher catalytic efficiencies upon sulfonamides degradation than most known chemically synthesized catalysts. Pseudo-first-order rate constant of sulfanilamide degradation (60 μM, 0.971 h-1) in the system mediated by Gt-rGO with the optimal rGO content of 6% was 6.7, 15.4 and 168.1 folds higher than those in the control rGO/H2O2, Gt/H2O2 and H2O2 systems, respectively. Excellent synergistic catalytic effects between Gt and rGO in Gt-rGO were identified in four continuous cycles. The Gt-rGO systems exhibited more efficient •OH generation, H2O2 decomposition and Fe(II) accumulation rates than the control Gt or rGO systems. Fast Fe(III)/Fe(II) cycling was obtained in the Gt-rGO systems, which might be due to the strong Fe-C coordination and the decrease of rGO aggregation and Gt particle sizes. Additionally, Gt particles in Gt-rGO exposed more defects as active sites for H2O2 activation. High-performance liquid chromatography-mass spectrometer analysis suggested that sulfanilamide was gradually degraded through hydroxylation, C-N cleavage and benzene ring opening. The results provided a new approach for the tailored design of eco-friendly, cost-effective and efficient iron (oxyhydr)oxides-graphene catalysts for contaminants elimination.
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Affiliation(s)
- Huali Yu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Guangfei Liu
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
| | - Bin Dong
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Ruofei Jin
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Jiti Zhou
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
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25
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Zhu G, Zhu J, Liu Q, Fu X, Chen Z, Li K, Cao F, Qin Q, Jiao M. HPO 42- enhanced catalytic activity of N, S, B, and O-codoped carbon nanosphere-armored Co 9S 8 nanoparticles for organic pollutants degradation via peroxymonosulfate activation: critical roles of superoxide radical, singlet oxygen and electron transfer. Phys Chem Chem Phys 2021; 23:5283-5297. [PMID: 33630982 DOI: 10.1039/d0cp04773b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In this study, we report a facile synthesis of a novel N, S, B, and O-codoped carbon nanosphere-armored Co9S8 nanoparticle composite (Co9S8@NSBOC) and its superior activation performance toward peroxymonosulfate (PMS) for methylene blue (MB) and ofloxacin degradation. The effects of various experimental parameters and the general applicability of the catalyst were investigated. Particularly, Co9S8@NSBOC exhibited high catalytic activity in a wide pH range of 3-12 and HPO42- exhibited a synergic catalytic effect with Co9S8@NSBOC in the degradation system. Radical quenching tests, EPR measurements and electrochemical analysis demonstrated that the degradation mechanism of pollutants in the Co9S8@NSBOC/PMS system included both radical and non-radical pathways, in which ˙O2-, 1O2 and electron transfer played dominant roles. Co2+, S2-, carbon defects, C[double bond, length as m-dash]O/C-O-C, pyridinic-N, graphitic-N, BC2O and C-S-C species on Co9S8@NSBOC, all contributed to PMS activation. The degradation pathways of MB and ofloxacin were proposed based on HPLC-MS/MS analysis of their degradation intermediates. This work not only presents a facile and practical synthetic method of cobalt sulfide-coupled multi-heteroatom-doped carbocatalysts, but also provides useful insights into their active sites and activation mechanisms toward PMS activation.
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Affiliation(s)
- Genxing Zhu
- School of Materials and Chemical Engineering, Zhongyuan University of Technology, Zhengzhou, Henan 450007, P. R. China.
| | - Jialu Zhu
- School of Materials and Chemical Engineering, Zhongyuan University of Technology, Zhengzhou, Henan 450007, P. R. China.
| | - Qi Liu
- College of Science, Zhongyuan University of Technology, Zhengzhou, Henan 450007, P. R. China
| | - Xinlong Fu
- School of Materials and Chemical Engineering, Zhongyuan University of Technology, Zhengzhou, Henan 450007, P. R. China.
| | - Ziyi Chen
- School of Materials and Chemical Engineering, Zhongyuan University of Technology, Zhengzhou, Henan 450007, P. R. China.
| | - Kai Li
- College of Resources and Environmental Sciences, Henan Agricultural University, Zhengzhou, Henan 450002, P. R. China
| | - Fengyi Cao
- School of Materials and Chemical Engineering, Zhongyuan University of Technology, Zhengzhou, Henan 450007, P. R. China.
| | - Qi Qin
- School of Materials and Chemical Engineering, Zhongyuan University of Technology, Zhengzhou, Henan 450007, P. R. China.
| | - Mingli Jiao
- School of Materials and Chemical Engineering, Zhongyuan University of Technology, Zhengzhou, Henan 450007, P. R. China.
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Abstract
In this work, the Fenton technology was applied to decolorize methylene blue (MB) and to inactivate Escherichia coli K12, used as recalcitrant compound and bacteria models respectively, in order to provide an approach into single and combinative effects of the main process variables influencing the Fenton technology. First, Box–Behnken design (BBD) was applied to evaluate and optimize the individual and interactive effects of three process parameters, namely Fe2+ concentration (6.0 × 10−4, 8.0 × 10−4 and 1.0 × 10−3 mol/L), molar ratio between H2O2 and Fe2+ (1:1, 2:1 and 3:1) and pH (3.0, 4.0 and 5.0) for Fenton technology. The responses studied in these models were the degree of MB decolorization (D%MB), rate constant of MB decolorization (kappMB) and E. coli K12 inactivation in uLog units (IuLogEC). According to the results of analysis of variances all of the proposed models were adequate with a high regression coefficient (R2 from 0.9911 to 0.9994). BBD results suggest that [H2O2]/[Fe2+] values had a significant effect only on D%MB response, [Fe2+] had a significant effect on all the responses, whereas pH had a significant effect on D%MB and IuLogEC. The optimum conditions obtained from response surface methodology for D%MB ([H2O2]/[Fe2+] = 2.9, [Fe2+] = 1.0 × 10−3 mol/L and pH = 3.2), kappMB ([H2O2]/[Fe2+] = 1.7, [Fe2+] = 1.0 × 10−3 mol/L and PH = 3.7) and IuLogEC ([H2O2]/[Fe2+] = 2.9, [Fe2+] = 7.6 × 10−4 mol/L and pH= 3.2) were in good agreement with the values predicted by the model.
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Abdelhafeez IA, Chen J, Zhou X. Scalable one-step template-free synthesis of ultralight edge-functionalized g-C3N4 nanosheets with enhanced visible light photocatalytic performance. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.117085] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Santhanaraj D, Joseph NR, Ramkumar V, Selvamani A, Bincy IP, Rajakumar K. Influence of lattice strain on Fe 3O 4@carbon catalyst for the destruction of organic dye in polluted water using a combined adsorption and Fenton process. RSC Adv 2020; 10:39146-39159. [PMID: 35518406 PMCID: PMC9057358 DOI: 10.1039/d0ra07866b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Accepted: 10/16/2020] [Indexed: 01/09/2023] Open
Abstract
In this study, 8, 25 and 50 wt% Fe3O4@activated carbon (AC) catalysts were prepared by simple coprecipitation method. The efficiency of the catalysts for the advanced Fenton's oxidation process using methylene blue (MB) as a model substrate was tested. Both modified and unmodified activated carbon catalysts exhibited similar activity towards the Fenton's oxidation process. Therefore, it is difficult to identify the role of the catalyst in this dye removal process. Hence, we proposed a new methodology to remove the MB by adopting the adsorption process initially, followed by the Fenton's oxidation process. The proposed process significantly improved the methylene blue decomposition reaction over the 25 wt% Fe3O4@AC catalyst. However, this trend was not seen in pure activated carbon and Fe3O4@AC (8 and 50 wt%) catalysts due to the instability of the material in the oxidizing medium. The possible reason for the deactivation of the catalysts was evaluated from lattice strain calculations, as derived from the modified W-H models (Uniform Deformational Model (UDM), Uniform Stress Deformation Model (USDM) and Uniform Deformation Energy Density Model (UDEDM)). These results provided a quantitative relationship between the experimentally calculated lattice strain values and Fenton's catalytic activity. Furthermore, the optimized strain value and crystalite size of Fe3O4 on the activated carbon matrix are responsible for the high catalytic activity.
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Affiliation(s)
- D Santhanaraj
- Department of Chemistry, Loyola College Chennai 600 034 Tamilnadu India
| | - N Ricky Joseph
- Department of Chemistry, Loyola College Chennai 600 034 Tamilnadu India
| | - V Ramkumar
- Department of Polymer Science and Technology, Council of Scientific and Industrial Research (CSIR) - Central Research Laboratory Adyar Chennai 600020 Tamilnadu India
| | - A Selvamani
- Catalytic Reforming Area, Light Stock Processing Division, CSIR - Indian Institute of Petroleum Dehradun-248005 Uttarakhand India
| | - I P Bincy
- Department of Physics, MES College Nedumkandam Kerala 685553 India
| | - K Rajakumar
- Nanotechnology Research & Education Centre South Ural State University Chelyabinsk-454080 Russia
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Hematite/Graphitic Carbon Nitride Nanofilm for Fenton and Photocatalytic Oxidation of Methylene Blue. SUSTAINABILITY 2020. [DOI: 10.3390/su12072866] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Hematite (α-Fe2O3)/graphitic carbon nitride (g-C3N4) nanofilm catalysts were synthesized on fluorine-doped tin oxide glass by hydrothermal and chemical vapor deposition. Scanning electron microscopy, energy-dispersive spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy analyses of the synthesized catalyst showed that the nanoparticles of g-C3N4 were successfully deposited on α-Fe2O3 nanofilm. The methylene blue degradation efficiency of the α-Fe2O3/g-C3N4 composite catalyst was 2.6 times greater than that of the α-Fe2O3 single catalyst under ultraviolet (UV) irradiation. The methylene blue degradation rate by the α-Fe2O3/g-C3N4 catalyst increased by 6.5 times after 1 mM of hydrogen peroxide (H2O2) was added. The photo-Fenton reaction of the catalyst, UV, and H2O2 greatly increased the methylene blue degradation. The results from the scavenger experiment indicated that the main reactants in the methylene blue decomposition reaction are superoxide radicals photocatalytically generated by g-C3N4 and hydroxyl radicals generated by the photo-Fenton reaction. The α-Fe2O3/g-C3N4 nanofilm showed excellent reaction rate constants at pH 3 (Ka = 6.13 × 10−2 min−1), and still better efficiency at pH 7 (Ka = 3.67 × 10−2 min−1), compared to other methylene blue degradation catalysts. As an immobilized photo-Fenton catalyst without iron sludge formation, nanostructured α-Fe2O3/g-C3N4 are advantageous for process design compared to particle-type catalysts.
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Yu G, Feng N, Zhao D, Wang H, Jin Y, Liu D, Li Z, Yang X, Ge K, Zhang J. A highly selective and sensitive upconversion nanoprobe for monitoring hydroxyl radicals in living cells and the liver. SCIENCE CHINA-LIFE SCIENCES 2020; 64:434-442. [PMID: 32239367 DOI: 10.1007/s11427-019-1601-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Accepted: 11/05/2019] [Indexed: 10/24/2022]
Abstract
Excessive reactive oxygen species (ROS) would attack living cells and cause a series of oxidative stress related diseases, such as liver damage. Hydroxyl radicals (·OH) are currently known as one of the most toxic and harmful free radicals to organisms. Therefore, studies involving hydroxyl radicals have become important research topics in the fields of biology, biochemistry, and biomedicine. In addition, imaging of analytes using upconversion nanoparticles (UCNPs) possesses significant advantages over that using general fluorescent dyes or nanoparticles due to its high spatial resolution, reduced photodamage, and deep tissue penetration properties. Herein, we designed a highly selective and sensitive hydroxyl radical nanoprobe based on the luminescence resonance energy transfer between upconversion nanoparticles and methylene blue (MB). The concentration of ·OH could be determined by the fluorescence recovery of the UCNPs due to the oxidative damage of MB. Using this nanoprobe, the ·OH in living cells or in liver tissues could be monitored with high sensitivity and selectivity.
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Affiliation(s)
- Guangshun Yu
- Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, Hebei University, Baoding, 071002, China
| | - Na Feng
- Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, Hebei University, Baoding, 071002, China
| | - Dan Zhao
- Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, Hebei University, Baoding, 071002, China
| | - Hao Wang
- Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, Hebei University, Baoding, 071002, China
| | - Yi Jin
- College of Medical Science, Hebei University, Baoding, 071002, China
| | - Dandan Liu
- Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, Hebei University, Baoding, 071002, China
| | - Zhenhua Li
- Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, Hebei University, Baoding, 071002, China
| | - Xinjian Yang
- Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, Hebei University, Baoding, 071002, China.
| | - Kun Ge
- Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, Hebei University, Baoding, 071002, China
| | - Jinchao Zhang
- Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, Hebei University, Baoding, 071002, China.
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31
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Hu J, Li J, Cui J, An W, Liu L, Liang Y, Cui W. Surface oxygen vacancies enriched FeOOH/Bi 2MoO 6 photocatalysis- fenton synergy degradation of organic pollutants. JOURNAL OF HAZARDOUS MATERIALS 2020; 384:121399. [PMID: 31653406 DOI: 10.1016/j.jhazmat.2019.121399] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 09/25/2019] [Accepted: 10/04/2019] [Indexed: 05/26/2023]
Abstract
To achieve rapid separation of photogenerated charges, increase photocatalytic degradation activity, a visible light-driven FeOOH/Bi2MoO6-OVs photocatalyst was designed and successfully fabricated via solvothermal synthesis and calcination. H2O2 was added under visible light irradiation to form a heterogeneous photocatalysis-Fenton synergy system. Using visible light irradiation, 10% FeOOH/Bi2MoO6-OVs had the best degradation activity. The removal efficiency of phenol was 100% within 3 h, which was 1.54 times and 1.33 times of the degradation efficiency of photocatalysis and Fenton alone, respectively. The catalyst has high removal activity for various pollutants and good cycle stability. Hydroxyl radicals and superoxide radicals have proven to be the main active substances and a reasonable catalytic mechanism was proposed. Surface oxygen vacancy can not only reduce the width of band gap, promote the separation and migration of photogenerated electron-hole pairs, but also make the OO bond of H2O2 elongate and weaken, making it easier to react with FeOOH and realize the synergistic effect of photocatalysis-Fenton. Simultaneously, the oxygen vacancies located near the valence band can capture holes, and the holes are rapidly transferred to the surface of the catalyst and participated in the degradation of pollutants.
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Affiliation(s)
- Jinshan Hu
- College of Chemical Engineering, Hebei Key Laboratory for Environment Photocatalytic and Electrocatalytic Materials, North China University of Science and Technology, Tangshan 063210, PR China
| | - Jing Li
- College of Chemical Engineering, Hebei Key Laboratory for Environment Photocatalytic and Electrocatalytic Materials, North China University of Science and Technology, Tangshan 063210, PR China
| | - Jifang Cui
- College of Chemical Engineering, Hebei Key Laboratory for Environment Photocatalytic and Electrocatalytic Materials, North China University of Science and Technology, Tangshan 063210, PR China
| | - Weijia An
- College of Chemical Engineering, Hebei Key Laboratory for Environment Photocatalytic and Electrocatalytic Materials, North China University of Science and Technology, Tangshan 063210, PR China
| | - Li Liu
- College of Chemical Engineering, Hebei Key Laboratory for Environment Photocatalytic and Electrocatalytic Materials, North China University of Science and Technology, Tangshan 063210, PR China
| | - Yinghua Liang
- College of Chemical Engineering, Hebei Key Laboratory for Environment Photocatalytic and Electrocatalytic Materials, North China University of Science and Technology, Tangshan 063210, PR China
| | - Wenquan Cui
- College of Chemical Engineering, Hebei Key Laboratory for Environment Photocatalytic and Electrocatalytic Materials, North China University of Science and Technology, Tangshan 063210, PR China.
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Zhu G, Zhu J, Fu X, Liu Q, Cao F, Li YN, Qin Q, Jiao M. Co nanoparticle-embedded N,O-codoped porous carbon nanospheres as an efficient peroxymonosulfate activator: singlet oxygen dominated catalytic degradation of organic pollutants. Phys Chem Chem Phys 2020; 22:15340-15353. [DOI: 10.1039/d0cp00679c] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A mesoporous N,O-doped carbon@Co composite with good magnetism for efficient catalytic elimination of organic pollutants via peroxymonosulfate activation.
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Affiliation(s)
- Genxing Zhu
- School of Materials and Chemical Engineering
- Zhongyuan University of Technology
- Zhengzhou
- P. R. China
| | - Jialu Zhu
- School of Materials and Chemical Engineering
- Zhongyuan University of Technology
- Zhengzhou
- P. R. China
| | - Xinlong Fu
- School of Materials and Chemical Engineering
- Zhongyuan University of Technology
- Zhengzhou
- P. R. China
| | - Qi Liu
- College of Science
- Zhongyuan University of Technology
- Zhengzhou
- P. R. China
| | - Fengyi Cao
- School of Materials and Chemical Engineering
- Zhongyuan University of Technology
- Zhengzhou
- P. R. China
| | - Yu-nan Li
- School of Materials and Chemical Engineering
- Zhongyuan University of Technology
- Zhengzhou
- P. R. China
| | - Qi Qin
- School of Materials and Chemical Engineering
- Zhongyuan University of Technology
- Zhengzhou
- P. R. China
| | - Mingli Jiao
- School of Materials and Chemical Engineering
- Zhongyuan University of Technology
- Zhengzhou
- P. R. China
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33
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Mengting Z, Kurniawan TA, Fei S, Ouyang T, Othman MHD, Rezakazemi M, Shirazian S. Applicability of BaTiO 3/graphene oxide (GO) composite for enhanced photodegradation of methylene blue (MB) in synthetic wastewater under UV-vis irradiation. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 255:113182. [PMID: 31541840 DOI: 10.1016/j.envpol.2019.113182] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 08/27/2019] [Accepted: 09/04/2019] [Indexed: 05/27/2023]
Abstract
Methylene blue (MB) is a dye pollutant commonly present in textile wastewater. We investigate and critically evaluate the applicability of BaTiO3/GO composite for photodegradation of MB in synthetic wastewater under UV-vis irradiation. To enhance its performance, the BaTiO3/GO composite is varied based on the BaTiO3 weight. To compare and evaluate any changes in their morphologies and crystalline structures before and after treatment, BET (Brunauer-Emmett-Teller), XRD (X-ray diffraction), FTIR (Fourier transform infrared spectroscopy), SEM (scanning electron microscopy) and TEM (transmission electron microscopy) tests are conducted, while the effects of reaction time, pH, dose of photocatalyst and initial MB concentration on its photodegradation by the composite are also investigated under identical conditions. The degradation pathways and removal mechanisms of MB by the BaTiO3/GO are elaborated. It is evident from this study that the BaTiO3/GO composite is promising for MB photodegradation through ·OH. Under optimized conditions (0.5 g/L of dose, pH 9.0, and 5 mg/L of MB concentration), the composite with 1:2 dose ratio of BaTiO3/GO has the highest MB degradation rate (95%) after 3 h of UV vis irradiation. However, its treated effluents still could not comply with the discharge standard limit of less than 0.2 mg/L imposed by national environmental legislation. This suggests that additional biological treatments are still required to deal with the remaining oxidation by-products of MB, still present in the wastewater samples such as 3,7-bis (dimethyl-amino)-10H-phenothiazine 5-oxide.
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Affiliation(s)
- Zhu Mengting
- Key Laboratory of the Coastal and Wetland Ecosystems (Xiamen University), Ministry of Education, College of the Environment and Ecology, Xiamen University, Xiamen 361102, Fujian, China
| | - Tonni Agustiono Kurniawan
- Key Laboratory of the Coastal and Wetland Ecosystems (Xiamen University), Ministry of Education, College of the Environment and Ecology, Xiamen University, Xiamen 361102, Fujian, China.
| | - Song Fei
- Key Laboratory of the Coastal and Wetland Ecosystems (Xiamen University), Ministry of Education, College of the Environment and Ecology, Xiamen University, Xiamen 361102, Fujian, China
| | - Tong Ouyang
- Key Laboratory of the Coastal and Wetland Ecosystems (Xiamen University), Ministry of Education, College of the Environment and Ecology, Xiamen University, Xiamen 361102, Fujian, China
| | - Mohd Hafiz Dzarfan Othman
- Advanced Membrane Technology Research Centre (AMTEC), School of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia
| | - Mashallah Rezakazemi
- Faculty of Chemical and Materials Engineering, Shahrood University of Technology, Shahrood, Iran
| | - Saeed Shirazian
- Department of Chemical Sciences, Bernal Institute, University of Limerick, Limerick, Ireland
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34
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Ribeiro SC, de Lima HH, Kupfer VL, da Silva CT, Veregue FR, Radovanovic E, Guilherme MR, Rinaldi AW. Synthesis of a superabsorbent hybrid hydrogel with excellent mechanical properties: Water transport and methylene blue absorption profiles. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111553] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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35
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Hęclik K, Duliban J, Dębska B, Lubczak J. Analysis of the Possibility and Conditions of Application of Methylene Blue to Determine the Activity of Radicals in Model System with Preaccelerated Cross-Linking of Polyester Resins. Int J Anal Chem 2019; 2019:2879869. [PMID: 31467548 PMCID: PMC6699369 DOI: 10.1155/2019/2879869] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 04/15/2019] [Accepted: 05/19/2019] [Indexed: 11/17/2022] Open
Abstract
Unsaturated polyester resins are usually processed using a curing system consisting of initiator and accelerator introduced into the resin. Actually, the producers apply built-in amine accelerators which can be named as preaccelerators. Commonly used preaccelerators for unsaturated resins are tertiary aromatic amines of which incorporation into resin structure may bring better stability. It also causes shorter gelation time of resins because of formation of active RO• radicals that initiate polymerization. Investigated radical reactions are too fast and there is no possibility of freezing it (in unsaturated polyester) to measure with Electron Paramagnetic Resonance (EPR). The analytical methodology on radicals activity measurement in model of preaccelerated unsaturated polyester resin reaction with methylene blue as indicator was presented. Using methylene blue as indicator allows us to determine the activity of forming radicals in three-component system (cobalt salt, amine preaccelerator, peroxide, or hydroperoxide) during the reaction of radicals generating. Changes in radicals activity using methylene blue as interceptor can be observed by changes of transmittance in the UV-Vis spectrum in the range 400-950 nm.
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Affiliation(s)
- Karol Hęclik
- Rzeszow University of Technology, Faculty of Chemistry, Department of Biotechnology and Bioinformatics, Al. Powstancow Warszawy 6, 35-959 Rzeszow, Poland
| | - Jerzy Duliban
- Rzeszow University of Technology, Faculty of Chemistry, Department of Organic Chemistry, Al. Powstancow Warszawy 6, 35-959 Rzeszow, Poland
| | - Barbara Dębska
- Rzeszow University of Technology, Faculty of Chemistry, Department of Biotechnology and Bioinformatics, Al. Powstancow Warszawy 6, 35-959 Rzeszow, Poland
| | - Jacek Lubczak
- Rzeszow University of Technology, Faculty of Chemistry, Department of Organic Chemistry, Al. Powstancow Warszawy 6, 35-959 Rzeszow, Poland
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36
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Kong W, Yue Q, Li Q, Gao B. Adsorption of Cd 2+ on GO/PAA hydrogel and preliminary recycle to GO/PAA-CdS as efficient photocatalyst. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 668:1165-1174. [PMID: 31018456 DOI: 10.1016/j.scitotenv.2019.03.095] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2018] [Revised: 02/22/2019] [Accepted: 03/07/2019] [Indexed: 05/12/2023]
Abstract
In this work, a GO (graphene oxide)/PAA (poly acrylic acid) hydrogel was prepared by graft polymerization between GO and AA. It was employed as highly efficient adsorbent for Cd2+ removal from wastewater. The GO/PAA-Cd2+ composite after the adsorption process was recycled through in-situ precipitation to obtain GO/PAA-CdS composites. During the synthesis process, the amounts of GO and AA were optimized to enable the hydrogel with maximum adsorption of Cd2+ (316.4 mg/g at 25 °C). The structure and chemical composites of GO/PAA hydrogel were investigated through FTIR spectra, Raman spectra, and TGA. The adsorption kinetics and isotherms of Cd2+ on GO/PAA were analyzed. The synthesized products served as an efficient adsorbent for Cd2+ and a suitable matrix for the CdS quantum dots formation which was confirmed by various characterizations, including XPS, SEM-EDS and HRTEM. The roles of GO and PAA in the successive adsorption-photocatalyst process were proved to be complementary: PAA improved the adsorption of Cd2+ while GO enhanced the photocatalyst efficiency. The photodegradation rate of MB (30 mg/L) was over 90% within 2 h.
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Affiliation(s)
- Wenjia Kong
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Qinyan Yue
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China.
| | - Qian Li
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China
| | - Baoyu Gao
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, China.
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