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Yu P, Guo J, Guo L, Deng Y, Tan J, Xu Q, Zhang Q, Li J. Construction of La 1-xSr xNiO 3/g-C 3N 4 type-Z heterojunctions with enhanced visible-light photocatalytic degradation of organic pollutants. ENVIRONMENTAL RESEARCH 2024; 260:119779. [PMID: 39142459 DOI: 10.1016/j.envres.2024.119779] [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: 05/30/2024] [Revised: 08/08/2024] [Accepted: 08/10/2024] [Indexed: 08/16/2024]
Abstract
Lanthanum nickelate (LaNiO3), known for its high visible-light absorption, is a promising photocatalyst for water purification. However, the low conduction band position and high photogenerated carrier complexation rate of pure LaNiO3 limit its photocatalytic activity. To address this issue, we investigated the synergistic effects of doping and constructing heterojunctions. A La0.9Sr0.1NiO3 (20%)/g-C3N4 (L2CN8) heterojunction was successfully created. In addition, various characterisation techniques were then employed to analyse the structure-performance relationships of these heterojunction photocatalysts in degrading organic dyes. Results revealed that at a 10% Sr doping level, the oxygen vacancy content was 0.68, which is significantly higher than that of LaNiO3 (0.05). The increased number of oxygen vacancies enhanced the electron capture ability and improved the separation efficiency of photogenerated carriers. Furthermore, the optimised L2CN8 (20 mg) achieved 81.2% and 73.8% removal of methylene blue (50.0 mL, 10 mg L-1) and tetracycline (50.0 mL, 10 mg L-1) under simulated visible-light irradiation (λ > 420 nm). Furthermore, an active species capture experiment confirmed the significant role of superoxide radicals (·O2-) in the degradation process. Based on these experimental findings, we proposed a rational Z-type charge transfer mechanism. This study holds great importance for water pollution control and environmental protection.
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Affiliation(s)
- Pengke Yu
- Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, South China Normal University, Guangzhou, 510006, China
| | - Jiaxing Guo
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China
| | - Liang Guo
- Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, South China Normal University, Guangzhou, 510006, China.
| | - Yaqin Deng
- Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, South China Normal University, Guangzhou, 510006, China
| | - Juntao Tan
- Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, South China Normal University, Guangzhou, 510006, China
| | - Qunang Xu
- Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, South China Normal University, Guangzhou, 510006, China
| | - Qingmao Zhang
- Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, South China Normal University, Guangzhou, 510006, China
| | - Jiaming Li
- Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, South China Normal University, Guangzhou, 510006, China
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2
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Xuan Y, Feng X, Liu S, Liu X. Novel polyarylether nitrile/layered bimetallic oxide/2-Methylimidazole composite membrane for efficient synergistic adsorption and degradation of organic pollutants under visible light. J Colloid Interface Sci 2024; 672:311-328. [PMID: 38850859 DOI: 10.1016/j.jcis.2024.05.234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 05/31/2024] [Accepted: 05/31/2024] [Indexed: 06/10/2024]
Abstract
The difficulty of recycling and the finite photocatalytic performance of primitive nano-photocatalysts restrict their application in wastewater purification. In this study, a multifunctional membrane with efficient synergistic adsorption and degradation performance was constructed. The nano-photocatalyst layered bimetallic oxide (LDO) was combined with the matrix membrane polyarylether nitrile (PEN) by delayed phase transition technology. The introduced 2-Methylimidazole (2-MeIm) provided a virtual electron transfer pathway between PEN and LDO and enhanced the photocatalytic performance. The results suggested that PEN/LDO/2-MeIm has outstanding removal performance to organic dyes methylene blue (MB). After three consecutive cycles, the reacted membrane can be readily recovered from the system. The MB removal rate remained high at 89.38%, suggesting that the functional membrane is eligible for recycling and reuse. Finally, based on liquid chromatography-mass spectrometry (LC-MS) analysis and density functional theory (DFT) calculations, the mechanism and pathway of MB photodegradation by the PEN/LDO/2-MeIm system were proposed. Therefore, constructing PEN/LDO/2-MeIm membranes in this study may offer a novel perspective on creating eco-friendly and functional PEN-based membranes for practical use in wastewater purification.
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Affiliation(s)
- Yahui Xuan
- School of Materials and Energy, University of Electronic Science and Technology of China, 611731 Chengdu, China; Sichuan Province Engineering Technology Research Center of Novel CN Polymeric Materials, 611731 Chengdu, China
| | - Xiaofang Feng
- School of Materials and Energy, University of Electronic Science and Technology of China, 611731 Chengdu, China; Sichuan Province Engineering Technology Research Center of Novel CN Polymeric Materials, 611731 Chengdu, China
| | - Shuning Liu
- School of Materials and Energy, University of Electronic Science and Technology of China, 611731 Chengdu, China; Sichuan Province Engineering Technology Research Center of Novel CN Polymeric Materials, 611731 Chengdu, China.
| | - Xiaobo Liu
- School of Materials and Energy, University of Electronic Science and Technology of China, 611731 Chengdu, China; Sichuan Province Engineering Technology Research Center of Novel CN Polymeric Materials, 611731 Chengdu, China
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3
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Moradi-Bieranvand M, Farhadi S, Zabardasti A, Mahmoudi F. Construction of magnetic MoS 2/NiFe 2O 4/MIL-101(Fe) hybrid nanostructures for separation of dyes and antibiotics from aqueous media. RSC Adv 2024; 14:11037-11056. [PMID: 38586447 PMCID: PMC10995676 DOI: 10.1039/d4ra00505h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Accepted: 04/02/2024] [Indexed: 04/09/2024] Open
Abstract
In this study, MoS2/NiFe2O4/MIL-101(Fe) nanocomposite was synthesized by hydrothermal method and used as an adsorbent for the elimination of organic dyes and some antibiotic drugs in aqueous solutions. The synthesized nanocomposite underwent characterization through different techniques, including scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDX), Brunauer-Emmett-Teller (BET) surface area analysis, Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), zeta potential analysis, vibrating sample magnetometry (VSM), and UV-vis diffuse reflectance spectroscopy (UV-vis DRS). These results demonstrated the successful insertion of MoS2within the cavities of MIL-101(Fe). The as-prepared magnetic nanocomposite was used as a new magnetic adsorbent for removing methylene blue (MB) and rhodamine B (RhB) organic dyes and tetracycline (TC) and ciprofloxacin (CIP) antibiotic drugs. For achieving the optimized conditions, the effects of initial pH, initial dye and drug concentration, temperature, and adsorbent dose on MB, TC, and CIP elimination were investigated. The results revealed that at a temperature of 25 °C, the highest adsorption capacities of MoS2/NiFe2O4/MIL-101(Fe) for MB, TC, and CIP were determined to be 999.1, 2991.3, and 1994.2 mg g-1, respectively. The pseudo-second-order model and Freundlich model are considered suitable for explaining the adsorption behavior of the MoS2/NiFe2O4/MIL-101(Fe) nanocomposite. The magnetic nanocomposite was very stable and had good recycling capability without any change in its structure.
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Affiliation(s)
- Mehri Moradi-Bieranvand
- Department of Inorganic Chemistry, Faculty of Chemistry, Lorestan University Khorramabad 68151-44316 Iran
| | - Saeed Farhadi
- Department of Inorganic Chemistry, Faculty of Chemistry, Lorestan University Khorramabad 68151-44316 Iran
| | - Abedin Zabardasti
- Department of Inorganic Chemistry, Faculty of Chemistry, Lorestan University Khorramabad 68151-44316 Iran
| | - Farzaneh Mahmoudi
- Department of Chemistry, University of Miami Coral Gables Florida 33146 USA
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4
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Li Z, Shen D, Hu X, Yang X, Li Y, Bao M. An S-scheme NH 2-MIL-101(Fe)@MCN/Bi 2O 3 heterojunction photocatalyst for the degradation of tetracycline and production of H 2O 2. CHEMOSPHERE 2023; 343:140234. [PMID: 37742765 DOI: 10.1016/j.chemosphere.2023.140234] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 08/24/2023] [Accepted: 09/19/2023] [Indexed: 09/26/2023]
Abstract
Effective and durable photocatalysts are essential for the decomposition of persistent contaminants and the generation of hydrogen peroxide. In this study, we successfully constructed an S-type heterojunction by in situ growing Bi2O3 nanocrystals and NH2-MIL-101(Fe) onto surface-modified g-C3N4. The process of charge transfer in the S-type heterojunction was confirmed using ISI-XPS, DFT calculations, capture experiments, and EPR signals. The combined influence of the heterojunction and MOF demonstrated remarkable photocatalytic performance in the breakdown of tetracycline (TC) and the generation of hydrogen peroxide (H2O2). In the enhanced setup (10%-NH2-MIL-101(Fe)@MCN/Bi2O3), full degradation of TC was accomplished within 50 min under visible light exposure. Additionally, a notable H2O2 yield of 655.63 μmol/g was attained, all achieved without the necessity of sacrificial agents or supplementary oxygen. Based on the outcomes of the dual functionality, the exceptional performance of the ternary composite material can be ascribed to the collaborative influence of the heterojunction and MOF. This collaborative effect expands the light absorption range in the visible region, suppresses the recombination of electron-hole pairs, and enhances the photocatalytic redox ability. The system demonstrates significant potential in the efficient in situ production of H2O2 and removal of recalcitrant organic pollutants in pure water.
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Affiliation(s)
- Zhe Li
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China; College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao, 266100, China
| | - Dongcai Shen
- College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao, 266100, China; Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao, 266100, China
| | - Xin Hu
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China; College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao, 266100, China
| | - Xiaolong Yang
- School of Chemistry and Chemical Engineering, State Key Laboratory of Bio-fibers and Eco-textiles, Collaborative Innovation Center of Shandong Marine Bio-based Fibers and Ecological Textiles, Qingdao University, 308 Ning Xia Road, Qingdao, 266071, China
| | - Yiming Li
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China; College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao, 266100, China
| | - Mutai Bao
- Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao, 266100, China; College of Chemistry & Chemical Engineering, Ocean University of China, Qingdao, 266100, China.
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5
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Shao Y, You D, Wan Y, Cheng Q, Pan Z. A novel molecularly expanded covalent triazine framework heterojunction with significantly enhanced molecular oxygen activation and photocatalysis performance under visible light. Dalton Trans 2023; 52:11272-11284. [PMID: 37526923 DOI: 10.1039/d3dt01726e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2023]
Abstract
The activation capacity of molecular oxygen is an important indicator to evaluate the photocatalytic efficiency of photocatalysts. In this paper, WS2 nanosheet was deposited on hyper-crosslinked CTF-1-G (obtained by molecular expansion from covalent triazine framework CTF-1) to form a C-GW heterojunction, which promoted the photodegradation of pollutants and the activation of molecular oxygen. This novel C-GW heterojunction exhibited excellent degradation property for organic pollutants (tetracycline (TC), rhodamine B (RhB)) and activating molecular oxygen under visible light irradiation. Among them, C-GW15 could degrade 98% of 20 ppm TC in 60 min and 99% of 30 ppm RhB in 30 min, and it had the highest hydrogen generation rate and hydrogen production amount in 4 hours, which were 8.74 mmol h-1 g-1 and 34.94 mmol g-1, respectively. Meanwhile, C-GW15 had the strongest 3,3',5,5'-tetramethylbenzidine oxidation capacity and could generate 1.83 μmol of ˙O2- in 60 min and the production of H2O2 was 20.8 μmol L-1 in 40 min. The results of this study clearly indicated that the combination of WS2 and CTF-1-G can enhance the visible light absorption capacity and photogenerated carrier separation efficiency, thus promoting the photocatalytic performance. Finally, a Z-type photocatalytic mechanism was proposed based on radical capture, molecular oxygen activation experiments and electron spin resonance analysis. These findings will extend the fundamental understanding of the Z-type photocatalytic mechanism and provide new opportunities for the rational design of CTF heterojunctions for the treatment of environmental pollution and clean energy conversion.
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Affiliation(s)
- Yuxuan Shao
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, PR China.
| | - Dan You
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, PR China.
| | - Yuqi Wan
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, PR China.
- The Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, 999077, PR China
| | - Qingrong Cheng
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, PR China.
| | - Zhiquan Pan
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, 430205, PR China.
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6
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An Q, Zhang H, Liu N, Wu S, Chen S. Fe-doped g-C3N4 synthesized by supramolecular preorganization for enhanced photo-Fenton activity. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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7
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Gong D, Guo J, Wang F, Zhang J, Song S, Feng B, Zhang X, Zhang W. Green construction of metal- and additive-free citrus peel-derived carbon dot/g-C 3N 4 photocatalysts for the high-performance photocatalytic decomposition of sunset yellow. Food Chem 2023; 425:136470. [PMID: 37269639 DOI: 10.1016/j.foodchem.2023.136470] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 05/23/2023] [Accepted: 05/25/2023] [Indexed: 06/05/2023]
Abstract
In this study, novel, metal-free, CP-derived CDs/g-C3N4 nanocomposites (CDCNs) were created by introducing citrus peel-derived carbon dots (CP-derived CDs) into graphite carbon nitride (g-C3N4) by a green hydrothermal method. The CDCNs were revealed to have superior photoelectrochemical properties relative to pristine g-C3N4 for the photocatalytic degradation of the food dye sunset yellow (SY) under visible light. For SY decomposition, the recommended catalyst contributed almost 96.3% to the photodegradation rate after 60 min of irradiation, showing satisfactory reusability, structural stability and biocompatibility. Moreover, a mechanism for enhanced photocatalytic SY degradation was proposed according to band analysis, free radical trapping and electron paramagnetic resonance (EPR) results. A possible pathway for SY photodegradation was also predicted from UV-visible (UV-Vis) spectroscopy and high-performance liquid chromatography (HPLC) results. The constructed nonmetallic nanophotocatalysts afford a novel route for the elimination of harmful dyes and for the resource conversion of citrus peels.
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Affiliation(s)
- Dezhuang Gong
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, PR China
| | - Jialiang Guo
- College of Life Sciences, Changchun Normal University, Changchun, Jilin 130032, PR China
| | - Fan Wang
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, PR China
| | - Jing Zhang
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, PR China
| | - Shuang Song
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, PR China
| | - Bingxin Feng
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, PR China
| | - Xiuling Zhang
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, PR China.
| | - Wentao Zhang
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang 150030, PR China.
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8
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Haile CT, Ahmad N, Chiu CW, Jeffrey Kuo CF. Highly photoactive novel NiS/BiOI nanocomposite photocatalyst towards efficient visible light organic pollutant degradation and carcinogenetic Cr (VI) reduction for environmental remediation. CHEMOSPHERE 2023; 323:138108. [PMID: 36804252 DOI: 10.1016/j.chemosphere.2023.138108] [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: 10/21/2022] [Revised: 01/13/2023] [Accepted: 02/08/2023] [Indexed: 06/18/2023]
Abstract
Heterojunction engineering in catalyst structures is a promising approach for solving the main restriction of the narrow photoabsorption range and quick recombination of photogenerated charge carriers in the photocatalysts. Herein, a simple, eco-friendly, non-toxic, and novel Z-scheme heterojunction of nanoflower-like NiS/BiOI was systematically designed using the low-temperature solvothermal and precipitation methods. The physicochemical and photo-electrochemical properties of the as-synthesized nanomaterials were characterized using XRD, FESEM, FT-IR, XPS, BET, UV-vis, PL, and EIS. NiS/BiOI nanomaterials exhibited a wide photoabsorption range (200-1000 nm), a narrow bandgap energy (1.76 eV), a large surface area (35.82 m2 g-1), and a low charge carrier recombination rate because of the synergistic effects of the NiS and BiOI photocatalysts, which could be the basis for superior photocatalytic efficiency. Particularly, the optimal 40% NiS/BiOI nanocomposite exhibited better stability and efficiency than the pure NiS and BiOI. The maximum degradation efficiency of rhodamine B (RhB) was 99.8% after 200 min, tetracycline (TC) was 96.3% after 140 min, and the photoreduction of Cr(VI) was 92.8% after 180 min rather than the pure NiS and BiOI under visible light irradiation. The constant rate (k) of RhB was approximately 10 and 4, TC was 12 and 4, and Cr(VI) was 10 and 8 times that of pristine NiS and BiOI, respectively. Radical trapping experiments and Tauc plot analysis proposed the design of the plausible Z-scheme reaction mechanism between NiS and BiOI, which has a crucial role in the rate of transportation and separation of electron/hole pairs. This investigation provides a venue for the design of a photoactive NiS-based nanocomposite for environmental remediation.
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Affiliation(s)
- Cheru Talbachew Haile
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, 10607, Taiwan, ROC
| | - Naveed Ahmad
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, 10607, Taiwan, ROC
| | - Chih-Wei Chiu
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, 10607, Taiwan, ROC
| | - Chung-Feng Jeffrey Kuo
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, 10607, Taiwan, ROC.
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Sanei A, Dashtian K, Yousefi Seyf J, Seidi F, Kolvari E. Biomass derived reduced-graphene-oxide supported α-Fe 2O 3/ZnO S-scheme heterostructure: Robust photocatalytic wastewater remediation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 332:117377. [PMID: 36739771 DOI: 10.1016/j.jenvman.2023.117377] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 01/12/2023] [Accepted: 01/24/2023] [Indexed: 06/18/2023]
Abstract
The emergence of new diseases and the unplanned industrialization of cities have led to new diseases and the subsequent use of antibiotics. Hence the remediation of wastewater containing antibiotics and their severe pollution has raised serious concerns in recent years. Herein coral-shaped α-Fe2O3/ZnO/reduced graphene oxide (r-GO)-like carbon heterojunction in-situ were prepared from basil seed as a sustainable biomass resource and applied for the photodegradation of the oxytetracycline (OTC) as a typical antibiotic in a helical plug flow photoreactor (HPFPR) via persulfate activation under visible light irradiation. Spectroscopy and electrochemical results confirmed the tunable band structure and quick light absorption, superior charge separation and transfer, satisfactory charge carrier lifetime, and long-term stability for the prepared photocatalyst. The 98% degradation efficiency was achieved for OTC within 90 min fitted by a first-order kinetic model with the rate constant of 0.1248 min-1. The finding proves that HPFPR exhibited a higher degradation rate of OTC by 2.3 times compared to the batch reactor. The 3D computational fluid dynamics (CFD) model confirmed the outstanding performance of the HPFPR. Scavenging experiments integrated with mott Schottky and DRS results revealed that rGO intensifies the S-scheme charge carrier transfer and built-in electric field and reduces the recombination. Finally, this work has substantial potential for the in-situ synthesis of environmental-friendly and large-scale metal oxide heterojunctions in natural carbon supports as well as scale-up and gives novel insights from molecular and engineering points of view into the wastewater remediation processes and clean water production.
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Affiliation(s)
- Armin Sanei
- Department of Chemistry, Semnan University, P.O. Box 35131-19111, Semnan, Iran
| | - Kheibar Dashtian
- Department of Chemistry, Iran University of Science and Technology, Tehran, 16846-13114, Iran
| | - Jaber Yousefi Seyf
- Department of Chemical Engineering, Hamedan University of Technology, Hamedan, Iran
| | - Farzad Seidi
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources and International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing, 210037, China
| | - Eskandar Kolvari
- Department of Chemistry, Semnan University, P.O. Box 35131-19111, Semnan, Iran.
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10
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Nayak D, Choudhary RB. Tuning the optical properties of high quantum-yield g-C 3N 4 with the inclusion of ZnS via FRET for high electron-hole recombination. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 289:122162. [PMID: 36516514 DOI: 10.1016/j.saa.2022.122162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 11/18/2022] [Accepted: 11/22/2022] [Indexed: 06/17/2023]
Abstract
Luminescent polymeric graphitic composites have the potential to be efficient energy converters for sophisticated displays and light sources. Thermal condensation is used to synthesize g-C3N4-ZnS composites. The XRD, and FTIR analyses confirmed the synthesis of the pure host, filler, and composites. FESEM, and TEM images revealed that the ZnS nanosheets were evenly distributed over the g-C3N4 sheets. As a result of ZnS incorporation, the melting point of g-C3N4 has been raised to 748.5 °C, and the thermal stability of gZ has been increased by 27 %. The optimized gZ15 band gap is determined to be 2.98 eV with a crystallite size of 4.2 nm and a micro stain of 35.42 × 10-3. With a purity of 63.4 %, gZ15 demonstrated a significant rate of recombination in the blue region. gZ15 has a high PLQY of 98 % and a FRET efficiency of 92%. All of the improved properties demonstrated that polymeric g-C3N4-ZnS was the optimum materials for usage in the active or emissive layer of optoelectronic devices.
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Affiliation(s)
- Debashish Nayak
- Nanostructured Composite Materials Laboratory, Department of Physics, Indian Institute of Technology (Indian School of Mines), Dhanbad, 826004, Jharkhand, India.
| | - Ram Bilash Choudhary
- Nanostructured Composite Materials Laboratory, Department of Physics, Indian Institute of Technology (Indian School of Mines), Dhanbad, 826004, Jharkhand, India.
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11
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Yan P, Ji F, Zhang W, Mo Z, Qian J, Zhu L, Xu L. Engineering surface bromination in carbon nitride for efficient CO 2 photoconversion to CH 4. J Colloid Interface Sci 2023; 634:1005-1013. [PMID: 36571854 DOI: 10.1016/j.jcis.2022.12.063] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 12/09/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022]
Abstract
The direct conversion of CO2 into reusable CH4 fuel by solar energy can effectively solve the problems of energy crisis and carbon emissions. However, the challenge of photocatalytic CO2 reduction to produce CH4 is still low conversion efficiency and poor selectivity. Here, surface brominated carbon nitride (named CNBr) is fabricated for stable and efficient photocatalytic CO2 reduction to produce CH4 with a rate of 16.68 μmol h-1 g-1 (70.27 % selectivity). Br atom in CNBr can substitute the N atom in the tri-s-triazine unites, which promotes local charge separation, narrows band gap and deepens the conduction band of CNBr. Benefiting from Br as active sites, CO2 can be enriched on the catalyst surface, and localized photogenerated electrons can activate the adsorbed CO2 to form CH4 through subsequent hydrogenation. Density functional theory results suggest that Br doping can effectively reduce the energy barrier of the rate-limiting step, accelerate the reaction, and induce the formation of *CHO, thereby improving the selectivity of CH4. This work reveals that surface modification can simultaneously increase the activation site of CO2 adsorption activation, enhance light absorption and accelerate charge, laying a solid foundation for the future design of carbon nitride based photocatalyst with high performance.
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Affiliation(s)
- Pengcheng Yan
- Institute for Energy Research, School of Materials Science and Engineering, School of Energy and Power Engineering, Jiangsu University, 212013 Zhenjiang, PR China
| | - Fawei Ji
- Institute for Energy Research, School of Materials Science and Engineering, School of Energy and Power Engineering, Jiangsu University, 212013 Zhenjiang, PR China
| | - Wei Zhang
- Institute for Energy Research, School of Materials Science and Engineering, School of Energy and Power Engineering, Jiangsu University, 212013 Zhenjiang, PR China.
| | - Zhao Mo
- Institute for Energy Research, School of Materials Science and Engineering, School of Energy and Power Engineering, Jiangsu University, 212013 Zhenjiang, PR China
| | - Junchao Qian
- Jiangsu Key Laboratory for Environment Functional Materials, Suzhou University of Science and Technology, 215009 Suzhou, PR China
| | - Linhua Zhu
- College of Chemistry and Chemical Engineering, Key Laboratory of Water Pollution Treatment and Resource Reuse of Hainan Province, Hainan Normal University, 571158 Haikou, PR China
| | - Li Xu
- Institute for Energy Research, School of Materials Science and Engineering, School of Energy and Power Engineering, Jiangsu University, 212013 Zhenjiang, PR China.
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12
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Bao J, Quan W, Ning Y, Wang H, Wei Q, Huang L, Zhang W, Ma Y, Hu X, Tian H. Efficient Visible-Light-Driven Tetracycline Degradation and Cr(VI) Reduction over a LaNi 1-xFe xO 3 (0 ≤ x ≤ 1)/g-C 3N 4 Type-II Heterojunction Photocatalyst. Inorg Chem 2023; 62:1086-1094. [PMID: 36622819 DOI: 10.1021/acs.inorgchem.2c02982] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The development of efficient, stable, and visible-light-responsive photocatalysts is crucial to address the pollution of water bodies by toxic heavy metal ions and organic antibiotics. Herein, a series of LaNi1-xFexO3/g-C3N4 heterojunction photocatalysts are prepared by a simple wet chemical method. Moreover, LaNi0.8Fe0.2O3/g-C3N4 composites are characterized by various methods, including structure, morphology, optical, and electrochemical methods and tetracycline degradation and photocatalytic reduction of Cr(VI) under visible light irradiation. Then, the photocatalytic performance of as-prepared LaNi0.8Fe0.2O3/g-C3N4 composites is evaluated. Compared with pure LaNi0.8Fe0.2O3 and g-C3N4, the LaNi0.8Fe0.2O3/g-C3N4 composite photocatalysts exhibit excellent photocatalytic performance due to synergy of doping and constructing heterojunctions. The results show that the doping of Fe ions can increase the concentration of oxygen vacancies, which is ultimately beneficial to the formation of electron traps. Moreover, the type-II heterojunction formed between LaNi0.8Fe0.2O3 and g-C3N4 effectively strengthens the separation and transfer of photoinduced carriers, thereby promoting photocatalytic activity. Furthermore, the photocatalytic activity of the LaNi0.8Fe0.2O3/g-C3N4 photocatalyst remains almost unchanged after three cycles, indicating long-term stability. Ultimately, the photocatalytic mechanism of the LaNi0.8Fe0.2O3/g-C3N4 composites is proposed.
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Affiliation(s)
- Jinyu Bao
- Key Laboratory of Automobile Materials of MOE and School of Materials Science and Engineering, Jilin University, Changchun130012, China
| | - Wei Quan
- Key Laboratory of Automobile Materials of MOE and School of Materials Science and Engineering, Jilin University, Changchun130012, China
| | - Yunqi Ning
- Key Laboratory of Automobile Materials of MOE and School of Materials Science and Engineering, Jilin University, Changchun130012, China
| | - Hanbing Wang
- Key Laboratory of Automobile Materials of MOE and School of Materials Science and Engineering, Jilin University, Changchun130012, China
| | - Qun Wei
- Key Laboratory of Automobile Materials of MOE and School of Materials Science and Engineering, Jilin University, Changchun130012, China
| | - Lingzhi Huang
- Key Laboratory of Automobile Materials of MOE and School of Materials Science and Engineering, Jilin University, Changchun130012, China
| | - Weijin Zhang
- College of Science and Laboratory of Materials Design and Quantum Simulation, Changchun University, Changchun130022, China
| | - Yongxiang Ma
- College of Science and Laboratory of Materials Design and Quantum Simulation, Changchun University, Changchun130022, China
| | - Xiaoying Hu
- College of Science and Laboratory of Materials Design and Quantum Simulation, Changchun University, Changchun130022, China
| | - Hongwei Tian
- Key Laboratory of Automobile Materials of MOE and School of Materials Science and Engineering, Jilin University, Changchun130012, China
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13
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Zhu B, Dong Q, Huang J, Song D, Chen L, Chen Q, Zhai C, Wang B, Klemeš JJ, Tao H. Visible-light driven p-n heterojunction formed between α-Bi 2O 3 and Bi 2O 2CO 3 for efficient photocatalytic degradation of tetracycline. RSC Adv 2023; 13:1594-1605. [PMID: 36688072 PMCID: PMC9827591 DOI: 10.1039/d2ra08162h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 12/26/2022] [Indexed: 01/11/2023] Open
Abstract
To improve the efficiency of photocatalytic oxidative degradation of antibiotic pollutants, it is essential to develop an efficient and stable photocatalyst. In this study, a polymer-assisted facile synthesis strategy is proposed for the polymorph-controlled α-Bi2O3/Bi2O2CO3 heterojunction retained at elevated calcination temperatures. The p-n heterojunction can effectively separate and migrate electron-hole pairs, which improves visible-light-driven photocatalytic degradation from tetracycline (TC). The BO-400@PAN-140 photocatalyst achieves the highest pollutant removal efficiency of 98.21% for photocatalytic tetracycline degradation in 1 h (λ > 420 nm), and the degradation efficiency was maintained above 95% after 5 cycles. The morphology, crystal structure, and chemical state of the composites were analysed by scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. Ultraviolet-visible diffuse reflection, transient photocurrent response, and electrochemical impedance spectroscopy were adopted to identify the charge transfer and separation efficiency of photogenerated electron-hole pairs. The EPR results verified h+ and ˙OH radicals as the primary active species in the photocatalytic oxidation reactions. This observation was also consistent with the results of radical trapping experiments. In addition, the key intermediate products of the photocatalytic degradation of TC over BO-400@PAN-140 were identified via high-performance liquid chromatography-mass spectrometry, which is compatible with two possible photocatalytic reaction pathways. This work provides instructive guidelines for designing heterojunction photocatalysts via a polymer-assisted semiconductor crystallographic transition pathway for TC degradation into cleaner production.
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Affiliation(s)
- Baikang Zhu
- School of Petrochemical Engineering & Environment, Zhejiang Ocean University Zhoushan 316022 China
- United National-Local Engineering Laboratory of Oil & Gas Storage and Transportation Technology Zhoushan Zhejiang 316022 China
- Zhejiang Provincial Key Laboratory of Petrochemical Environmental Pollution Control Zhoushan Zhejiang 316022 China
| | - Qinbing Dong
- School of Petrochemical Engineering & Environment, Zhejiang Ocean University Zhoushan 316022 China
| | - Jianghua Huang
- School of Petrochemical Engineering & Environment, Zhejiang Ocean University Zhoushan 316022 China
| | - Debin Song
- School of Petrochemical Engineering & Environment, Zhejiang Ocean University Zhoushan 316022 China
| | - Lihui Chen
- School of Petrochemical Engineering & Environment, Zhejiang Ocean University Zhoushan 316022 China
| | - Qingguo Chen
- School of Petrochemical Engineering & Environment, Zhejiang Ocean University Zhoushan 316022 China
| | - Chunyang Zhai
- School of Materials Science and Chemical Engineering, Ningbo University Ningbo 315211 China
| | - Bohong Wang
- School of Petrochemical Engineering & Environment, Zhejiang Ocean University Zhoushan 316022 China
| | - Jiří Jaromír Klemeš
- Sustainable Process Integration Laboratory - SPIL, NETME Centre, Faculty of Mechanical Engineering, Brno University of Technology - VUT Brno Technická 2896/2 616 69 Brno Czech Republic
| | - Hengcong Tao
- School of Petrochemical Engineering & Environment, Zhejiang Ocean University Zhoushan 316022 China
- Zhejiang Provincial Key Laboratory of Petrochemical Environmental Pollution Control Zhoushan Zhejiang 316022 China
- College of Chemical and Biological Engineering, Zhejiang University Hangzhou 310058 China
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14
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Li P, Qu J, Wu J, Zhang J, Zhou G, Zhang Y, Cao Y, Teng D. Calcination-Induced Oxygen Vacancies Enhancing the Photocatalytic Performance of a Recycled Bi 2O 3/BiOCl Heterojunction Nanosheet. ACS OMEGA 2022; 7:46250-46259. [PMID: 36570211 PMCID: PMC9773810 DOI: 10.1021/acsomega.2c04496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Accepted: 11/21/2022] [Indexed: 06/17/2023]
Abstract
With the rapid development of industry, bismuth-based semiconductors have been widely used for the photocatalytic degradation of organic contaminants discharged into wastewater. Herein, a Bi2O3/BiOCl (BBOC) heterojunction was constructed with high photocatalytic activity toward Rhodamine B (RhB) in the first cycle of the photocatalysis test, while the photocatalytic performance was drastically reduced after repeated testing. The adsorbed RhB molecules occupying the facial active sites of BBOC contributed to the decline of photocatalytic activity. The spent BBOC can be reactivated by the decomposition of the adsorbed RhB and the introduction of oxygen vacancies during calcination under an air atmosphere. The BBOC thus recovered exhibited a superior apparent rate constant of 0.08087 min-1 compared with 0.05228 min-1 of pristine BBOC. This study provided an effective strategy to investigate the deactivation/activation mechanism of bismuth-based heterojunction photocatalysts.
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Affiliation(s)
- Peng Li
- School
of Chemical Engineering, Zhengzhou University, Zhengzhou450001, Henan, China
| | - Jie Qu
- School
of Chemical Engineering, Zhengzhou University, Zhengzhou450001, Henan, China
| | - Jing Wu
- Huaibei
Blasting Technology Research Institute Co., Ltd., Huaibei235000, Anhui, China
| | - Jie Zhang
- School
of Ecology and Environment, Zhengzhou University, Zhengzhou450001, Henan, China
| | - Guoli Zhou
- School
of Chemical Engineering, Zhengzhou University, Zhengzhou450001, Henan, China
| | - Ying Zhang
- School
of Chemical Engineering, Zhengzhou University, Zhengzhou450001, Henan, China
- Zhongyuan
Critical Metals Laboratory, Zhengzhou University, Zhengzhou450001, Henan, China
| | - Yijun Cao
- School
of Chemical Engineering, Zhengzhou University, Zhengzhou450001, Henan, China
- Zhongyuan
Critical Metals Laboratory, Zhengzhou University, Zhengzhou450001, Henan, China
| | - Daoguang Teng
- School
of Chemical Engineering, Zhengzhou University, Zhengzhou450001, Henan, China
- Zhongyuan
Critical Metals Laboratory, Zhengzhou University, Zhengzhou450001, Henan, China
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15
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Cui H, Wang Z, Cao G, Wu Y, Song J, Li Y, Zhang L, Mu J, Chou X. Facilitated Photocatalytic Degradation of Rhodamine B over One-Step Synthesized Honeycomb-Like BiFeO 3/g-C 3N 4 Catalyst. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3970. [PMID: 36432256 PMCID: PMC9699307 DOI: 10.3390/nano12223970] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 11/07/2022] [Accepted: 11/08/2022] [Indexed: 06/16/2023]
Abstract
In the present work, a facile one-step methodology was used to synthesize honeycomb-like BiFeO3/g-C3N4 composites, where the well-dispersed BiFeO3 strongly interacted with the hg-C3N4. The 10BiFeO3/hg-C3N4 could completely degrade RhB under visible light illumination within 60 min. The degradation rate constant was remarkably improved and approximately three times and seven times that of pristine hg-C3N4 and BiFeO3, respectively. This is ascribed to the following factors: (1) the unique honeycomb-like morphology facilitates the diffusion of the reactants and effectively improves the utilization of light energy by multiple reflections of light; (2) the charged dye molecules can be tightly bound to the spontaneous polarized BiFeO3 surface to form the Stern layer; (3) the Z-scheme heterojunction and the ferroelectric synergistically promoted the efficient separation and migration of the photogenerated charges. This method can synchronously tune the micro-nano structure, surface property, and internal field construction for g-C3N4-based photocatalysts, exhibiting outstanding potential in environmental purification.
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Affiliation(s)
- Haoran Cui
- School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, China
- School of Instrument and Electronics, North University of China, Taiyuan 030051, China
| | - Zhipeng Wang
- School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, China
| | - Guoqiang Cao
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
| | - Yiwan Wu
- School of Food Science and Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Jian Song
- School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, China
| | - Yu Li
- School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, China
| | - Le Zhang
- School of Instrument and Electronics, North University of China, Taiyuan 030051, China
| | - Jiliang Mu
- School of Instrument and Electronics, North University of China, Taiyuan 030051, China
| | - Xiujian Chou
- School of Instrument and Electronics, North University of China, Taiyuan 030051, China
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16
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Zhou T, Shi J, Li G, Liu B, Hu B, Che G, Liu C, Wang L, Yan L. Advancing n-π* electron transition of carbon nitride via distorted structure and nitrogen heterocycle for efficient photodegradation: Performance, mechanism and toxicity insight. J Colloid Interface Sci 2022; 632:285-298. [DOI: 10.1016/j.jcis.2022.11.073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 10/31/2022] [Accepted: 11/14/2022] [Indexed: 11/21/2022]
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17
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Xu Q, Wang P, Wang Z, Shen J, Han X, Zheng X, Wei Y, Li C, Song K. Aerosol self-assembly synthesis of g-C3N4/MXene/Ag3PO4 heterostructure for enhanced photocatalytic degradation of tetracycline hydrochloride. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129392] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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18
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Tao H, Wang Y, Lv B, Tao F, Wang W. A Fe 3O 4 nanospheres/carbon core–shell structure for effective removal of pollutants from water. JOURNAL OF CHEMICAL RESEARCH 2022. [DOI: 10.1177/17475198221120927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The treatment of wastewater by adsorption is a good alternative technique and attracts extensive attention worldwide due to its versatility, scalability, and low operational costs. In this work, a Fe3O4 nanospheres/carbon core–shell structure is fabricated by combination of a template method and calcination. The morphology and crystal structure of the synthesized composite are characterized by transmission electron microscopy, X-ray powder diffraction, Fourier transform infrared spectrometer, and from nitrogen adsorption–desorption isotherms, confirming that the carbon layer with a porous structure is successfully loaded onto the surface of the face-centered cubic Fe3O4 nanospheres to form a core–shell structure. The adsorption performance of the Fe3O4 nanospheres/carbon core–shell structure is investigated by studying the effects of the initial pH value of the solution, the contact time, the initial concentration of the pollutants, the adsorption temperature, and the amount of adsorbent. The Fe3O4 nanospheres/carbon core–shell structure effectively removes heavy metal Chromium(VI) and a reactive light yellow dye. The results of batch experiments show that the removal efficiencies of heavy metal Chromium(VI) and the reactive light yellow dye are close to 100% under optimized conditions. The good adsorption performance of the Fe3O4 nanospheres/carbon core–shell structure toward various types of pollutants suggests a potential application in wastewater treatment.
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Affiliation(s)
- Huaqiang Tao
- School of Civil Engineering, Shaoxing University, Shaoxing, P.R. China
| | - Yuxiang Wang
- School of Civil Engineering, Shaoxing University, Shaoxing, P.R. China
| | - Beifeng Lv
- School of Civil Engineering, Shaoxing University, Shaoxing, P.R. China
| | - Feifei Tao
- School of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing, P.R. China
| | - Wei Wang
- School of Civil Engineering, Shaoxing University, Shaoxing, P.R. China
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19
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Hoang TVA, Nguyen PA, Choi WM, Shin EW. The Growth of Extended Melem Units on g-C 3N 4 by Hydrothermal Treatment and Its Effect on Photocatalytic Activity of g-C 3N 4 for Photodegradation of Tetracycline Hydrochloride under Visible Light Irradiation. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:nano12172945. [PMID: 36079982 PMCID: PMC9457853 DOI: 10.3390/nano12172945] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 08/19/2022] [Accepted: 08/23/2022] [Indexed: 05/05/2023]
Abstract
In this work, the growth of extended tri-s-triazine units (melem units) on g-C3N4 (CN) by hydrothermal treatment and its effect on the photodegradation efficiency of tetracycline hydrochloride (TC) is investigated. The CN-180-x and CN-200-6 samples were prepared using different hydrolysis times and temperatures, and they were characterized by multiple physicochemical techniques. In addition, their photodegradation performance was evaluated under visible light irradiation. Compared to the CN, CN-180-6 possesses remarkable photocatalytic degradation efficiency at 97.17% towards TC removal in an aqueous solution. The high visible-light-induced photo-reactivity of CN-180-6 directly correlates to charge transfer efficiency, numerous structural defects with a high specific surface area (75.0 m2 g-1), and sufficient O-functional groups over g-C3N4. However, hydrothermal treatment at a higher temperature or during a longer time additionally induces the growth of extended melem units on the surface of g-C3N4, resulting in the inhibition of the charge transfer. In addition, the superoxide radical is proven to be generated from photoexcited reaction and plays a key role in the TC degradation.
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Affiliation(s)
- Thi Van Anh Hoang
- School of Chemical Engineering, University of Ulsan, Daehakro 93, Nam-gu, Ulsan 44610, Korea
| | - Phuong Anh Nguyen
- School of Chemical Engineering, University of Ulsan, Daehakro 93, Nam-gu, Ulsan 44610, Korea
| | - Won Mook Choi
- School of Chemical Engineering, University of Ulsan, Daehakro 93, Nam-gu, Ulsan 44610, Korea
| | - Eun Woo Shin
- School of Chemical Engineering, University of Ulsan, Daehakro 93, Nam-gu, Ulsan 44610, Korea
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20
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Pan Y, Hu X, Shen D, Li Z, Chen R, Li Y, Lu J, Bao M. Facile construction of Z-scheme Fe-MOF@BiOBr/M−CN heterojunction for efficient degradation of ciprofloxacin. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121216] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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21
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Ali NS, Jabbar NM, Alardhi SM, Majdi HS, Albayati TM. Adsorption of methyl violet dye onto a prepared bio-adsorbent from date seeds: isotherm, kinetics, and thermodynamic studies. Heliyon 2022; 8:e10276. [PMID: 36042747 PMCID: PMC9420514 DOI: 10.1016/j.heliyon.2022.e10276] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 06/07/2022] [Accepted: 08/09/2022] [Indexed: 11/24/2022] Open
Abstract
Raw date seeds, as prospective natural, broadly obtainable and low-price agricultural waste for adsorbing cationic dyes from aqueous solutions, have been studied. In this work, Iraqi date seeds were prepared and characterised using X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy and Brunauer–Emmett–Teller (BET) surface area analysis before being used as an efficient bio-adsorbent for methyl violet (MV) dye removal. Adsorption tests were conducted with three investigated parameters, namely, time of contact, first adsorbate concentration and adsorbent dose. Compared with the pseudo first-order model (coefficient of determination = 0.9001), the pseudo second-order model was determined to be the best-fitting model with a coefficient of determination (R2) of 0.9917. The equilibrium isotherms for MV were obtained, and their ultimate capacity of adsorption was (59.5 mg g1). Two isotherm models, Langmuir and Freundlich, were studied to fit the equilibrium data. Compared with the Freundlich isotherm model (R2 = 0.8154), the Langmuir model functioned better as an adsorption isotherm with R2 of 0.9837. In addition, the adsorption process was endothermic and spontaneous. The date seeds acted as active adsorbents to remove MV from the aqueous solutions in the model experiments.
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Affiliation(s)
- Nisreen S Ali
- Mustansiriyah University, College of Engineering, Materials Engineering Department, Baghdad, Iraq
| | - Noor M Jabbar
- Biochemical Engineering Department, Al-Khwarizmi Engineering College, University of Baghdad, Baghdad, Iraq
| | - Saja M Alardhi
- Nanotechnology and Advanced Materials Research Center, University of Technology, Iraq
| | - Hasan Sh Majdi
- Chemical Engineering Department and Petroleum Industries, Al-Mustaqbal University College, Babylon 51001, Iraq
| | - Talib M Albayati
- Chemical Engineering Department, University of Technology- Iraq, 52 Alsinaa St., PO Box 35010, Baghdad, Iraq
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22
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Coral-like potassium and phosphorous doped graphitic carbon nitride structures with enhanced charge and mass transfer dynamics toward photocatalytic hydrogen peroxide production and microbial disinfection. J Colloid Interface Sci 2022; 617:326-340. [DOI: 10.1016/j.jcis.2022.03.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 03/01/2022] [Accepted: 03/06/2022] [Indexed: 11/16/2022]
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23
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Tang D, Chen X, Yan J, Xiong Z, Lou X, Ye C, Chen J, Qiu T. Facile one-pot synthesis of a BiOBr/Bi2WO6 heterojunction with enhanced visible-light photocatalytic activity for tetracycline degradation. Chin J Chem Eng 2022. [DOI: 10.1016/j.cjche.2022.02.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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24
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Zhang M, Yang Y, An X, Zhao J, Bao Y, Hou LA. Exfoliation method matters: The microstructure-dependent photoactivity of g-C 3N 4 nanosheets for water purification. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127424. [PMID: 34634708 DOI: 10.1016/j.jhazmat.2021.127424] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 09/25/2021] [Accepted: 10/01/2021] [Indexed: 06/13/2023]
Abstract
Exfoliation of carbon nitride (g-C3N4) into an ultrathin nanostructure significantly improves its photoactivity. However, the effects of the exfoliation method on the microstructure and photocatalytic performance of g-C3N4 nanosheets remain largely unknown. Herein, several typical strategies, such as thermal, chemical, ultrasonic and one-step exfoliation, were applied to exfoliate g-C3N4 nanosheets for photocatalytic applications. A procedure capable of controlling the morphology, microstructure, light-absorption property, and visible light photoactivity of g-C3N4 nanosheets was attempted. We found that nanosheets prepared from one-step exfoliation present superior photocatalytic efficiency under visible light than those fabricated by thermal exfoliation and ultrasonic exfoliation. The kinetic constants for bisphenol A (BPA) photodegradation over these samples were determined to be 6.5, 4.5 and 2.3 times higher than bulk g-C3N4, respectively. For chemical exfoliation, excessive oxidation by H2SO4 can lead to the structural defects and deactivation of urea-derived g-C3N4 nanosheets. Carbon nitride nanosheets synthesized by one-step exfoliation exhibited high specific surface area, optimal band gap energy structure, and high charge separation efficiency, thereby increasing visible-light photoactivity. Enabling cost-effective production of ultrathin and robust g-C3N4 nanosheets, one-step exfoliation offers a potential strategy to exploit high-performance g-C3N4 for water purification applications.
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Affiliation(s)
- Menglu Zhang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China
| | - Yu Yang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
| | - Xiaoqiang An
- Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China
| | | | - Yueping Bao
- Environment Chemistry and Materials Centre (ECMC), Nanyang Environment and Water Research Institute (NEWRI), Nanyang Technological University, 1 Cleantech Loop, CleanTech One, Singapore 637141, Singapore
| | - Li-An Hou
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China; High Tech Inst Beijing, Beijing 100094, Peoples R China
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25
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Lv B, Xu J, Kang H, Liang P, Wang W, Tao F. Adsorption Behavior of Magnetic Carbon-Supported Metal Nickel for the Efficient Dye Removal from Water. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:1682. [PMID: 35162710 PMCID: PMC8835217 DOI: 10.3390/ijerph19031682] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Revised: 01/28/2022] [Accepted: 01/30/2022] [Indexed: 11/16/2022]
Abstract
Magnetic carbon-supported metal nickel has been successfully synthesized by solvothermal method and heat treatment for highly effective adsorption of various reactive dyes. Structure characterization and composition analysis demonstrated that the metal nickel nanoparticles with the size of 1-2 nm were embedded into the pore of carbon spheres. It is helpful to prevent the agglomeration and falling off of metal nickel nanoparticles on the surface of carbon spheres. The adsorption performance of the carbon-supported metal nickel nanospheres for reactive brilliant yellow R-4GLN was studied by changing the pH value and initial concentration of the solution, adsorption time, adsorption temperature, and the amount of adsorbent. The carbon-supported metal nickel showed fast and efficient adsorption activity. After 5 min of adsorption, the removal efficiency of 10 mL 25 mg·mL-1 reactive brilliant yellow R-4GLN was close to 100%. The carbon-supported metal nickel composite was reused 20 times, and the removal efficiency of dye remained above 98%. It also showed good adsorption performance on various reactive dyes with wide universality, which has a certain adsorption effect on most dyes with a high utilization value in wastewater treatment.
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Affiliation(s)
- Beifeng Lv
- School of Civil Engineering, Shaoxing University, Shaoxing 312000, China; (B.L.); (W.W.)
| | - Jingjing Xu
- School of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing 312000, China; (J.X.); (P.L.)
| | - Haibo Kang
- School of Civil Engineering, College of Transportation Engineering, Nanjing Tech University, Nanjing 210009, China;
| | - Pengfei Liang
- School of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing 312000, China; (J.X.); (P.L.)
| | - Wei Wang
- School of Civil Engineering, Shaoxing University, Shaoxing 312000, China; (B.L.); (W.W.)
| | - Feifei Tao
- School of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing 312000, China; (J.X.); (P.L.)
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26
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In situ grown bacterial cellulose/MoS 2 composites for multi-contaminant wastewater treatment and bacteria inactivation. Carbohydr Polym 2022; 277:118853. [PMID: 34893262 DOI: 10.1016/j.carbpol.2021.118853] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 10/08/2021] [Accepted: 11/02/2021] [Indexed: 01/06/2023]
Abstract
For the purpose of developing multifunctional water purification materials capable of degrading organic pollutants while simultaneously inactivating microorganisms from contaminated wastewater streams, we report here a facile and eco-friendly method to immobilize molybdenum disulfide into bacterial cellulose via a one-step in-situ biosynthetic method. The resultant nanocomposite, termed BC/MoS2, was shown to possess a photocatalytic activity capable of generating •OH from H2O2, while also exhibiting photodynamic/photothermal mechanisms, the combination of which exhibits synergistic activity for the degradation of pollutants as well as for bacterial inactivation. In the presence of H2O2, the BC/MoS2 nanocomposite exhibited excellent antibacterial efficacy upwards of 99.9999% (6 log units) for the photoinactivation of both Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus upon infrared (IR) lamp illumination (100 W, 760 nm ≤ λ ≤ 5000 nm, 15 cm vertical distance; 5 min). Mechanistic studies revealed synergistic pathogen inactivation resulting from the combination of photocatalytically generated •OH and hyperthermia induced by the photothermal conversion of the near-IR light. In addition, the BC/MoS2 nanocomposite also showed excellent photodegradation activity for common aqueous contaminants in the presence of H2O2, including malachite green (a textile dye), catechol violet (a phenol) and formaldehyde. Taken together, our findings demonstrate that sustainable materials such as BC/MoS2 have potential applications in wastewater treatment and microorganism disinfection.
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Xiong J, Zeng HY, Peng JF, Xu S, Yang ZL. Insight into the enhanced photocatalytic activity mechanism of the Ag 3VO 4/CoWO 4 p–n heterostructure under visible light. CrystEngComm 2022. [DOI: 10.1039/d2ce00524g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel Ag3VO4/CoWO4 p–n heterostructure was designed and prepared by an in situ growth method. The physicochemical properties were characterized by multiple techniques, and the photocatalytic performances in Cr(vi) reduction and TC degradation were also evaluated under visible-light irradiation.
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Affiliation(s)
- Jie Xiong
- College of Chemical Engineering, Xiangtan University, Xiangtan, Hunan, 411105, China
| | - Hong-Yan Zeng
- College of Chemical Engineering, Xiangtan University, Xiangtan, Hunan, 411105, China
| | - Jin-Feng Peng
- School of Mechanical Engineering, College of Chemical Engineering, Xiangtan University, Xiangtan, Hunan, 411105, China
| | - Sheng Xu
- College of Chemical Engineering, Xiangtan University, Xiangtan, Hunan, 411105, China
| | - Zhuo-Lin Yang
- College of Chemical Engineering, Xiangtan University, Xiangtan, Hunan, 411105, China
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Liu P, Li S, Zhang L, Yin X, Ma Y. Shearing bridge bonds in carbon nitride vesicles with enhanced hot carrier utilization for photocatalytic hydrogen production. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00474g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synergistic effect of morphology tailoring and the formation of oxygen-containing groups in g-C3N4 enhanced the production and separation of photoinduced carriers for photocatalytic H2 production.
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Affiliation(s)
- Ping Liu
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, P. R. China
| | - Shisen Li
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, 266109, P. R. China
| | - Lingling Zhang
- Department of Food, Haidu College, Qingdao Agricultural University, Yantai, 265200, P. R. China
| | - Xingliang Yin
- Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, P. R. China
| | - Yongchao Ma
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, 266109, P. R. China
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Zhu Z, Kumar R, Luo L, Varjani S, Huo P, Wong J, Zhao J. Quantum effect and Mo-N surface bonding states of α-MoC1-x modified carbon nitride for boosting photocatalytic performance. Catal Sci Technol 2022. [DOI: 10.1039/d2cy01157c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photocatalytic degradation of pharmaceuticals in the aquatic environment is considered a promising strategy to address water pollution. In this study, a novel photocatalyst was constructed by decorating g-C3N4 (CN) with...
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High efficiency degradation of tetracycline and rhodamine B using Z-type BaTiO3/γ-Bi2O3 heterojunction. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119666] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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31
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Pan Y, Hu X, Bao M, Li F, Li Y, Lu J. Fabrication of MIL-Fe (53)/modified g-C3N4 photocatalyst synergy H2O2 for degradation of tetracycline. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119661] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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32
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Yan L, Li W, Zhao Q, Zhu Z, Hu C, Liu B. Enhanced photocatalytic conversion of (3D/2D) BiVO4@Polypyrrole/g-C3N4 ternary composites with Z-scheme band alignment for the Antibiotic removal. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126783] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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33
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Govarthanan M, Mythili R, Kim W, Alfarraj S, Alharbi SA. Facile fabrication of (2D/2D) MoS 2@MIL-88(Fe) interface-driven catalyst for efficient degradation of organic pollutants under visible light irradiation. JOURNAL OF HAZARDOUS MATERIALS 2021; 414:125522. [PMID: 33684820 DOI: 10.1016/j.jhazmat.2021.125522] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 02/11/2021] [Accepted: 02/22/2021] [Indexed: 06/12/2023]
Abstract
The present investigation describes the photocatalytic degradation of methylene blue (MB) and rhodamine-B (RhB) using molybdenum disulfide (MoS2) anchored metal-organic frameworks (MOFs) under visible light irradiation. Herein, MIL-88(Fe) was successfully modified with MoS2 to yield a novel heterogeneous MoS2@MIL-88(Fe) hybrid composite. The prepared catalyst enhances the superior photocatalytic activity than the pristine form of MoS2 and MIL-88(Fe) framework. The physico-chemical properties of the prepared catalyst were analytically investigated and the results exhibit greater photocatalytic efficiency towards the chosen dyes, with an optical band gap of 2.75 eV. The MoS2 and MIL-88(Fe) framework could act as efficient oxidation and reduction sites in the as-synthesized MoS2@MIL-88(Fe) composite, and generated the non-toxic by-products such as hydroxyl (•OH), and superoxide species (•O2-) for the mineralization of MB and RhB dyes. The degradation kinetics showed that the dye system followed a pseudo-first-order model which is well supported by the Langmuir-Hinshelwood mechanism. Moreover, the reusability studies showed excellent photocatalytic activity after five cycles. Finally, the photocatalytic degradation mechanism of MB and RhB dyes was suggested.
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Affiliation(s)
- M Govarthanan
- Department of Environmental Engineering, Kyungpook National University, Daegu, South Korea
| | - R Mythili
- PG & Research Department of Biotechnology, Mahendra Arts & Science College, Kalippatti, Tamil Nadu, India
| | - Woong Kim
- Department of Environmental Engineering, Kyungpook National University, Daegu, South Korea.
| | - Saleh Alfarraj
- Zoology Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Sulaiman Ali Alharbi
- Department of Botany and Microbiology, College of Science, King Saud University, PO Box-2455, Riyadh 11451, Saudi Arabia
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Karpuraranjith M, Chen Y, Wang B, Ramkumar J, Yang D, Srinivas K, Wang W, Zhang W, Manigandan R. Hierarchical ultrathin layered MoS 2@NiFe 2O 4 nanohybrids as a bifunctional catalyst for highly efficient oxygen evolution and organic pollutant degradation. J Colloid Interface Sci 2021; 592:385-396. [PMID: 33677198 DOI: 10.1016/j.jcis.2021.02.062] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 02/10/2021] [Accepted: 02/14/2021] [Indexed: 02/07/2023]
Abstract
Rational design and highly efficient dual-functional catalyst are still difficult to develop for electrocatalytic oxygen evolution reaction and degradation of RhB dye pollutant. Herein, we report a highly efficient "bandgap matching and interfacial coupling" strategy to synthesize nano-assembled ultrathin layered MoS2@NiFe2O4 (MS@NiFeO) bifunctional catalyst constructed by the hydrothermal route and subsequently amine-hydrolysis. The OER performance of the prepared MS@NiFeO catalyst delivers a low overpotential of 290 mV at 10 mA/cm2 and Tafel slope is 69.2 mV dec-1 in an alkaline solution. In addition, the nano-assembled ultrathin layered structure of MS@NiFeO showed a highly efficient (96.37%) RhB dye degradation performance than that of MoS2 nanosheets and NiFe2O4 nanostructures. Unique nanostructure of ultrathin layered MS@NiFeO with suitable band matching, interfacial charge transfer, high surface area and more active sites favored for the enhancement of the catalytic activity. This work presents an unpretentious construction and low-cost production strategy to synthesize bifunctional hybrid catalyst for oxygen evolution reaction as well as degradation of organic pollutant with superior efficiency and longer stability.
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Affiliation(s)
- Marimuthu Karpuraranjith
- School of Electronic Science and Technology, and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, PR China.
| | - Yuanfu Chen
- School of Electronic Science and Technology, and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, PR China; School of Science and Institute of Oxygen Supply, Tibet University, Lhasa 850000, PR China.
| | - Bin Wang
- School of Electronic Science and Technology, and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, PR China
| | - Jeyagopal Ramkumar
- School of Electronic Science and Technology, and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, PR China
| | - Dongxu Yang
- School of Electronic Science and Technology, and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, PR China
| | - Katam Srinivas
- School of Electronic Science and Technology, and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, PR China
| | - Wei Wang
- School of Electronic Science and Technology, and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, PR China
| | - Wanli Zhang
- School of Electronic Science and Technology, and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, PR China
| | - Ramadoss Manigandan
- School of Electronic Science and Technology, and State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, PR China.
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Mahvelati-Shamsabadi T, Fattahimoghaddam H, Lee BK, Bae S, Ryu J. Synthesis of hexagonal rosettes of g-C 3N 4 with boosted charge transfer for the enhanced visible-light photocatalytic hydrogen evolution and hydrogen peroxide production. J Colloid Interface Sci 2021; 597:345-360. [PMID: 33892420 DOI: 10.1016/j.jcis.2021.04.019] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 04/02/2021] [Accepted: 04/05/2021] [Indexed: 10/21/2022]
Abstract
Photocatalytic sustainable fuel production attracted extensive attention because of the urgent need of the society to shift from fossil fuels to solar fuels. Herein, the synthesis of hexagonal rosettes of g-C3N4 with an efficient performance toward hydrogen evolution and hydrogen peroxide production as the two kinds of solar fuels were reported. The hexagonal rosettes of g-C3N4 were simply fabricated via controlled solid-state polymerization of three-dimensional hexagonal rosettes of cyanuric acid-melamine adduct at 500 °C. The hexagonal rosettes of g-C3N4 showed an amorphous nature with an extremely high surface area of 400 m2 g-1. Also, the as-obtained catalyst demonstrated remarkable photocatalytic activity in hydrogen production of 1285 μmol g-1 h-1 and hydrogen peroxide production of 150 μmol g-1 h-1. The mechanism for the polymerization process of the cyanuric acid-melamine (CM) complex to hexagonal rosettes of g-C3N4 was thoroughly described employing electron microscopy tools. This study identified that the CM complex condensation is accomplished via a dehydration process by producing a highly condensed and active structure of g-C3N4, which is different from the previously reported condensation mechanism of the melamine and its derivatives performed through a deamination process.
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Affiliation(s)
- Tahereh Mahvelati-Shamsabadi
- DeparFVtment of Civil and Environmental Engineering, University of Ulsan, Daehak-ro 93, Nam-gu, Ulsan 44610, Republic of Korea
| | - Hossein Fattahimoghaddam
- DeparFVtment of Civil and Environmental Engineering, University of Ulsan, Daehak-ro 93, Nam-gu, Ulsan 44610, Republic of Korea
| | - Byeong-Kyu Lee
- DeparFVtment of Civil and Environmental Engineering, University of Ulsan, Daehak-ro 93, Nam-gu, Ulsan 44610, Republic of Korea.
| | - Sanghyun Bae
- Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea; Emergent Hydrogen Technology R&D Center, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Jungki Ryu
- Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea; Emergent Hydrogen Technology R&D Center, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea
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Jafarizadeh T, Hayati P, Neyrizi HZ, Mehrabadi Z, Farjam MH, Gutiérrez A, Adarsh NN. Synthesis and structural characterization of a novel Zn(II) metal organic complex (Zn-MOC) and elimination of highly consumed antibiotic; tetracycline from aqueous solution by their nanostructures photocatalyst under visible light. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129448] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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37
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Ledakowicz S, Paździor K. Recent Achievements in Dyes Removal Focused on Advanced Oxidation Processes Integrated with Biological Methods. Molecules 2021; 26:molecules26040870. [PMID: 33562176 PMCID: PMC7914684 DOI: 10.3390/molecules26040870] [Citation(s) in RCA: 64] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 01/26/2021] [Accepted: 01/29/2021] [Indexed: 01/16/2023] Open
Abstract
In the last 3 years alone, over 10,000 publications have appeared on the topic of dye removal, including over 300 reviews. Thus, the topic is very relevant, although there are few articles on the practical applications on an industrial scale of the results obtained in research laboratories. Therefore, in this review, we focus on advanced oxidation methods integrated with biological methods, widely recognized as highly efficient treatments for recalcitrant wastewater, that have the best chance of industrial application. It is extremely important to know all the phenomena and mechanisms that occur during the process of removing dyestuffs and the products of their degradation from wastewater to prevent their penetration into drinking water sources. Therefore, particular attention is paid to understanding the mechanisms of both chemical and biological degradation of dyes, and the kinetics of these processes, which are important from a design point of view, as well as the performance and implementation of these operations on a larger scale.
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