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Zhang Y, Sun S, Wu Y, Chen F. Emerging Roles of Graphitic Carbon Nitride-based Materials in Biomedical Applications. ACS Biomater Sci Eng 2024. [PMID: 39086282 DOI: 10.1021/acsbiomaterials.4c00053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2024]
Abstract
Graphite carbon nitride (g-C3N4) is a two-dimensional conjugated polymer with a unique energy band structure similar to graphene. Due to its outstanding analytical advantages, such as relatively small band gap (2.7 eV), low-cost synthesis, high thermal stability, excellent photocatalytic ability, and good biocompatibility, g-C3N4 has attracted the interest of researchers and industry, especially in the medical field. This paper summarizes the latest research on g-C3N4-based composites in various biomedical applications, including therapy, diagnostic imaging, biosensors, antibacterial, and wearable devices. In addition, the application prospects and possible challenges of g-C3N4 in nanomedicine are also discussed in detail. This review is expected to inspire emerging biomedical applications based on g-C3N4.
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Affiliation(s)
- Yue Zhang
- Key Laboratory of Pathobiology, Ministry of Education, Nanomedicine and Translational Research Center, China-Japan Union Hospital of Jilin University, Changchun 130033, Jilin, P. R. China
| | - Shuang Sun
- Key Laboratory of Pathobiology, Ministry of Education, Nanomedicine and Translational Research Center, China-Japan Union Hospital of Jilin University, Changchun 130033, Jilin, P. R. China
| | - Yuanyu Wu
- Department of Gastrointestinal, Colorectal and Anal Surgery, China-Japan Union Hospital of Jilin University, Changchun 130033, Jilin, P. R. China
| | - Fangfang Chen
- Key Laboratory of Pathobiology, Ministry of Education, Nanomedicine and Translational Research Center, China-Japan Union Hospital of Jilin University, Changchun 130033, Jilin, P. R. China
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2
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Srijith, Konar R, Teblum E, Singh VK, Telkhozhayeva M, Paiardi M, Nessim GD. Chemical-Vapor-Deposition-Synthesized Two-Dimensional Non-Stoichiometric Copper Selenide (β-Cu 2-xSe) for Ultra-Fast Tetracycline Hydrochloride Degradation under Solar Light. Molecules 2024; 29:887. [PMID: 38398638 PMCID: PMC10892667 DOI: 10.3390/molecules29040887] [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: 01/25/2024] [Revised: 02/11/2024] [Accepted: 02/15/2024] [Indexed: 02/25/2024] Open
Abstract
The high concentration of antibiotics in aquatic environments is a serious environmental issue. In response, researchers have explored photocatalytic degradation as a potential solution. Through chemical vapor deposition (CVD), we synthesized copper selenide (β-Cu2-xSe) and found it an effective catalyst for degrading tetracycline hydrochloride (TC-HCl). The catalyst demonstrated an impressive degradation efficiency of approximately 98% and a reaction rate constant of 3.14 × 10-2 min-1. Its layered structure, which exposes reactive sites, contributes to excellent stability, interfacial charge transfer efficiency, and visible light absorption capacity. Our investigations confirmed that the principal active species produced by the catalyst comprises O2- radicals, which we verified through trapping experiments and electron paramagnetic resonance (EPR). We also verified the TC-HCl degradation mechanism using high-performance liquid chromatography-mass spectrometry (LC-MS). Our results provide valuable insights into developing the β-Cu2-xSe catalyst using CVD and its potential applications in environmental remediation.
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Affiliation(s)
- Srijith
- Department of Chemistry, Bar-Ilan Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan 5290002, Israel; (S.); (R.K.); (E.T.); (V.K.S.); (M.T.)
| | - Rajashree Konar
- Department of Chemistry, Bar-Ilan Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan 5290002, Israel; (S.); (R.K.); (E.T.); (V.K.S.); (M.T.)
| | - Eti Teblum
- Department of Chemistry, Bar-Ilan Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan 5290002, Israel; (S.); (R.K.); (E.T.); (V.K.S.); (M.T.)
| | - Vivek Kumar Singh
- Department of Chemistry, Bar-Ilan Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan 5290002, Israel; (S.); (R.K.); (E.T.); (V.K.S.); (M.T.)
| | - Madina Telkhozhayeva
- Department of Chemistry, Bar-Ilan Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan 5290002, Israel; (S.); (R.K.); (E.T.); (V.K.S.); (M.T.)
| | - Michelangelo Paiardi
- Department of Chemistry and Materials Engineering “Giulio Natta”, Politecnico Di Milano, Piazza Leonardo da Vinci, 32, 20133 Milano, Italy;
| | - Gilbert Daniel Nessim
- Department of Chemistry, Bar-Ilan Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan 5290002, Israel; (S.); (R.K.); (E.T.); (V.K.S.); (M.T.)
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Makowski D, Lisowski W, Baluk MA, Klimczuk T, Bajorowicz B. Design and Synthesis of NTU-9/C 3N 4 Photocatalysts: Effects of NTU-9 Content and Composite Preparation Method. MATERIALS (BASEL, SWITZERLAND) 2023; 16:5007. [PMID: 37512281 PMCID: PMC10385252 DOI: 10.3390/ma16145007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 07/06/2023] [Accepted: 07/11/2023] [Indexed: 07/30/2023]
Abstract
Hybrid materials based on graphitic carbon nitride (g-C3N4) and NTU-9 metal-organic frameworks (MOF) were designed and prepared via solvothermal synthesis and calcination in air. The as-prepared photocatalysts were subsequently characterized using Brunauer-Emmett-Teller (BET) analysis, UV-Vis diffuse reflectance spectroscopy (DRS), photoluminescence (PL) emission spectroscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). The obtained NTU-9/C3N4 composites showed a greatly improved photocatalytic performance for the degradation of toluene in the gas phase under LED visible-light irradiation (λmax = 415 nm). The physicochemical properties and photocatalytic activities of the obtained NTU-9/C3N4 materials were tuned by varying the NTU-9 content (5-15 wt%) and preparation method of the composite materials. For composites prepared by calcination, the photocatalytic activity increased with decreasing NTU-9 content as a result of the formation of TiO2 from the MOFs. The best photocatalytic performance (65% of toluene was photodegraded after 60 min) was achieved by the NTU-9/C3N4 sample prepared via the solvothermal method and containing 15 wt% MOF, which can be attributed to the appropriate amount and stable combination of composite components, efficient charge separation, and enhanced visible-light absorption ability. The photocatalytic mechanisms of the prepared hybrid materials depending on the preparation method are also discussed.
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Affiliation(s)
- Damian Makowski
- Department of Environmental Technology, Faculty of Chemistry, University of Gdansk, 80-308 Gdansk, Poland
| | - Wojciech Lisowski
- Institute of Physical Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Poland
| | - Mateusz A Baluk
- Department of Environmental Technology, Faculty of Chemistry, University of Gdansk, 80-308 Gdansk, Poland
| | - Tomasz Klimczuk
- Department of Solid State Physics, Faculty of Applied Physics and Mathematics, Gdansk University of Technology, 80-233 Gdansk, Poland
| | - Beata Bajorowicz
- Department of Environmental Technology, Faculty of Chemistry, University of Gdansk, 80-308 Gdansk, Poland
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4
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Dual morphology ZnCo2O4 coupled graphitic carbon nitride: An efficient electro-catalyst for electrochemical H2O2 production and methanol oxidation reaction. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2023.142161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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5
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Singh KB, Upadhyay D, Gautam N, Snigdha, Gautam A, Pandey G. Sonochemical reassembling of Acacia nilotica bark extract mediated Mg doped WO3@g-C3N4 ternary nanocomposite: A robust nanophotocatalyst. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/01/2023]
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6
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Pattanayak DS, Pal D, Mishra J, Thakur C, Wasewar KL. Doped graphitic carbon nitride (g-C 3N 4) catalysts for efficient photodegradation of tetracycline antibiotics in aquatic environments. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:24919-24926. [PMID: 35306654 DOI: 10.1007/s11356-022-19766-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 03/13/2022] [Indexed: 06/14/2023]
Abstract
Tetracyclines (TCs) antibiotics are very common and often used in both human and veterinary medicines. More than 75% of TCs are excreted in an active condition and released into the environment, posing a risk to the ecosystem and human health. Residual antibiotics are in global water bodies, causing antibiotic resistance and genotoxicity in humans and aquatic organisms. The ever-increasing number of multi-resistant bacteria caused by the widespread use of antibiotics in the environment has sparked a renewed interest in developing more sustainable antibiotic degradation processes. In this regard, photodegradation technique provides a promising solution to resolve this growing issue, paving the way for complete antibiotic degradation with the generation of non-toxic by-products. As a fascinating activity towards visible light range shown by semiconductor, graphitic carbon nitride (g-C3N4) has a medium bandgap, non-toxicity, chemically stable complex, and thermally great strength. Recent studies have concentrated on the performance of g-C3N4 as a photocatalyst for treating wastewater. Pure g-C3N4 exhibits limited photocatalytic activity due to insufficient sunlight usage, small surface area, and a high rate of recombination of electron and hole ([Formula: see text] & [Formula: see text]) pairs created in photocatalytic activity. Doping of g-C3N4 is a very effective method for improving the activity as element doped g-C3N4 shows excellent bandgap and electronic structure. Doping significantly broadens the light-responsive range and reduces recombination of e- & h+ pairs. Under above context, this review provides a systematic and comprehensive outlook of designing doped g-C3N4 as well as efficiency for TCs degradation in aquatic environment.
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Affiliation(s)
- Dhruti Sundar Pattanayak
- Department of Chemical Engineering, National Institute of Technology Raipur, Raipur, 492 010, CG, India
| | - Dharm Pal
- Department of Chemical Engineering, National Institute of Technology Raipur, Raipur, 492 010, CG, India.
| | - Jyoti Mishra
- Department of Chemistry (Environmental Science and Technology Program), ITER, Siksha'O'Anusandhan (Deemed To Be) University, Bhubaneswar, 751 030, Odisha, India
| | - Chandrakant Thakur
- Department of Chemical Engineering, National Institute of Technology Raipur, Raipur, 492 010, CG, India
| | - Kailas L Wasewar
- Department of Chemical Engineering, VNIT, Nagpur, 440010, MH, India
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7
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Photodegradation of cytostatic drugs by g-C3N4: synthesis, properties and performance fitted by selecting the appropriate precursor. Catal Today 2023. [DOI: 10.1016/j.cattod.2023.114068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
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8
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Cako E, Dudziak S, Głuchowski P, Trykowski G, Pisarek M, Fiszka Borzyszkowska A, Sikora K, Zielińska-Jurek A. Heterojunction of (P, S) co-doped g-C3N4 and 2D TiO2 for improved carbamazepine and acetaminophen photocatalytic degradation. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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9
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Baladi E, Davar F, Hojjati-Najafabadi A. Synthesis and characterization of g-C 3N 4-CoFe 2O 4-ZnO magnetic nanocomposites for enhancing photocatalytic activity with visible light for degradation of penicillin G antibiotic. ENVIRONMENTAL RESEARCH 2022; 215:114270. [PMID: 36100101 DOI: 10.1016/j.envres.2022.114270] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 08/11/2022] [Accepted: 09/01/2022] [Indexed: 06/15/2023]
Abstract
Nowadays, antibiotic water pollution is an increasingly dangerous environmental threat. Thus, water treatment is essential for their reduction and removal. In recent decades, photocatalysts have attracted much attention due to their influential role in solving this issue. The photocatalytic process, which is one of the green processes and part of advanced oxidation processes, can be a good choice for treating contaminated water containing non-degradable organic matter. However, the design of high-performance photocatalysts under free sunlight can be challenging. In this study, g-C3N4-Ca, Mg codoped CoFe2O4-ZnO (gCN-CFO-ZnO) nanocomposite photocatalyst was applied in removing penicillin G (PENG) from drug effluents. Also, the effects of contaminant concentration, initial pH, irradiation time, and zinc oxide ratio in the nanocomposites were investigated. The hydrothermal method was carried out to prepare the appropriate composites. Then, the obtained products were characterized by powder X-Ray diffraction (PXRD), Fourier-transform infrared spectroscopy (FT-IR), Raman, field-emission scanning and transmission electron microscope (FE-SEM&TEM), energy dispersive X-Ray (EDX), diffuse reflectance spectroscopy (DRS), vibrating sample magnetometer (VSM) and Photoluminescence (PL) techniques. According to the findings, the degradation of PENG in an acidic environment occurred remarkably; under the same conditions, with decreasing pH from 9 to 5 in the gCN-CFO-ZnO (33.33%) nanocomposite, the degradation efficiency grew from 47% to 74%. Also, the degradation rate of PENG in gCN-CFO-ZnO (16.66%) and gCN-CFO-ZnO (50%) nanocomposites under optimal conditions (pH = 5, PENG the concentration of 10 ppm, and irradiation time of 120 min) was achieved 52% and 60%, respectively. Further, gCN-CFO-ZnO (33.33%) nanocomposite showed higher efficiency in PENG degradation compared to the other two nanocomposites.
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Affiliation(s)
- Elham Baladi
- Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Fatemeh Davar
- Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Iran.
| | - Akbar Hojjati-Najafabadi
- School of Materials Science and Physics, China University of Mining and Technology, Xuzhou, 221116, PR China; Faculty of Materials, Metallurgy and Chemistry, School of Materials Science and Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, China; College of Rare Earths, Jiangxi University of Science and Technology, No.86, Hongqi Ave., Ganzhou, Jiangxi, 341000, PR China.
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10
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Pourmadadi M, Rahmani E, Eshaghi MM, Shamsabadipour A, Ghotekar S, Rahdar A, Romanholo Ferreira LF. Graphitic carbon nitride (g-C3N4) as a new carrier for drug delivery applications: A review. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2022.104001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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11
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Dhillon SK, Kundu PP. Magnesium Cobaltite Embedded in Corncob-Derived Nitrogen-Doped Carbon as a Cathode Catalyst for Power Generation in Microbial Fuel Cells. ACS APPLIED MATERIALS & INTERFACES 2022; 14:47633-47649. [PMID: 36222104 DOI: 10.1021/acsami.2c12279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Microbial fuel cells (MFCs) have drawn attention among renewable energy devices. High capital cost, poor durability, and slow oxygen reduction reaction (ORR) kinetics are the major hindrances in the commercialization of the technology. In this work, an environmentally benign approach is followed to synthesize a composite of magnesium cobaltite (MgCo2O4) embedded in nitrogen-doped carbon to optimize the performance of MFCs. Detailed characterization confirms the formation of MgCo2O4 nanostructures in the catalyst treated at 700 °C. Electrochemical studies suggest the superior performance of the MgCo2O4/NC-700 catalyst with a peak reduction current of -0.068 mA and a charge transfer resistance (Rct) of 40.5 Ω. The performance of the air cathodes is evaluated using activated sludge as inoculum in the anode chamber in single-chamber MFCs. The power output of MFC with MgCo2O4/NC-700 as an air cathode reaching 873.81 mW m-2 is 59.56 and 216.05% higher than those of MFCs with Pt/C (547.65 mW m-2) and Co/NC-700 (276.48 mW m-2) cathodes, respectively. These findings suggest that substituting magnesium in transition metal-nitrogen-carbon composites could help realize long-term application as air cathodes for power generation and wastewater treatment in MFCs.
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Affiliation(s)
- Simran Kaur Dhillon
- Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee247667, India
| | - Patit Paban Kundu
- Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee247667, India
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12
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Doosti M, Jahanshahi R, Laleh S, Sobhani S, Sansano JM. Solar light induced photocatalytic degradation of tetracycline in the presence of ZnO/NiFe2O4/Co3O4 as a new and highly efficient magnetically separable photocatalyst. Front Chem 2022; 10:1013349. [PMID: 36311420 PMCID: PMC9606596 DOI: 10.3389/fchem.2022.1013349] [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: 08/06/2022] [Accepted: 09/29/2022] [Indexed: 11/18/2022] Open
Abstract
In this study, a new solar light-driven magnetic heterogeneous photocatalyst, denoted as ZnO/NiFe2O4/Co3O4, is successfully prepared. FT-IR, XPS, XRD, VSM, DRS, FESEM, TEM, EDS, elemental mapping, and ICP analysis are accomplished for full characterization of this catalyst. FESEM and TEM analyses of the photocatalyt clearly affirm the formation of a hexagonal structure of ZnO (25–40 nm) and the cubic structure of NiFe2O4 and Co3O4 (10–25 nm). Furthermore, the HRTEM images of the photocatalyst verify some key lattice fringes related to the photocatalyt structure. These data are in very good agreement with XRD analysis results. According to the ICP analysis, the molar ratio of ZnO/NiFe2O4/Co3O4 composite is obtained to be 1:0.75:0.5. Moreover, magnetization measurements reveals that the ZnO/NiFe2O4/Co3O4 has a superparamagnetic behavior with saturation magnetization of 32.38 emu/g. UV-vis DRS analysis indicates that the photocatalyst has a boosted and strong light response. ZnO/NiFe2O4/Co3O4, with band gap energy of about 2.65 eV [estimated according to the Tauc plot of (αhν)2vs. hν], exhibits strong potential towards the efficacious degradation of tetracycline (TC) by natural solar light. It is supposed that the synergistic optical effects between ZnO, NiFe2O4, and Co3O4 species is responsible for the increased photocatalytic performance of this photocatalyst under the optimal conditions (photocatalyst dosage = 0.02 g L−1, TC concentration = 30 mg L−1, pH = 9, irradiation time = 20 min, and TC degradation efficiency = 98%). The kinetic study of this degradation process is evaluated and it is well-matched with the pseudo-first-order kinetics. Based on the radical quenching tests, it can be perceived that •O2− species and holes are the major contributors in such a process, whereas the •OH radicals identify to have no major participation. The application of this methodology is implemented in a facile and low-cost photocatalytic approach to easily degrade TC by using a very low amount of the photocatalyst under natural sunlight source in an air atmosphere. The convenient magnetic isolation and reuse of the photocatalyst, and almost complete mineralization of TC (based on TOC analysis), are surveyed too, which further highlights the operational application of the current method. Notably, this method has the preferred performance among the very few methods reported for the photocatalytic degradation of TC under natural sunlight. It is assumed that the achievements of this photocatalytic method have opened an avenue for sustainable environmental remediation of a broad range of contaminants.
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Affiliation(s)
- Mohammadreza Doosti
- Department of Civil Engineering, Faculty of Engineering, University of Birjand, Birjand, Iran
| | - Roya Jahanshahi
- Department of Chemistry, College of Sciences, University of Birjand, Birjand, Iran
| | - Shaghayegh Laleh
- Department of Civil Engineering, Faculty of Engineering, University of Birjand, Birjand, Iran
| | - Sara Sobhani
- Department of Chemistry, College of Sciences, University of Birjand, Birjand, Iran
- *Correspondence: Sara Sobhani,
| | - José Miguel Sansano
- Departamento de Química Orgánica, Facultad de Ciencias, Centro de Innovación en Química Avanzada (ORFEO-CINQA) and Instituto de Síntesis Orgánica (ISO), Universidad de Alicante, Alicante, Spain
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13
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Kulhary D, Singh S. Design of g‐C
3
N
4
/BaBiO
3
Heterojunction Nanocomposites for Photodegradation of an Organic Dye and Diclofenac Sodium under Visible Light via Interfacial Charge Transfer. ChemistrySelect 2022. [DOI: 10.1002/slct.202201964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Dinesh Kulhary
- Special Center for Nanoscience Jawaharlal Nehru University New Delhi 110067 India
| | - Satyendra Singh
- Special Center for Nanoscience Jawaharlal Nehru University New Delhi 110067 India
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14
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Torres-Pinto A, Silva CG, Faria JL, Silva AM. The effect of precursor selection on the microwave-assisted synthesis of graphitic carbon nitride. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.08.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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15
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Tateishi I, Furukawa M, Katsumata H, Kaneco S. Photocatalytic degradation of bisphenol A using O-doped dual g-C3N4 under visible light irradiation. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.08.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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16
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Hasnan NSN, Mohamed MA, Anuar NA, Abdul Sukur MF, Mohd Yusoff SF, Wan Mokhtar WNA, Mohd Hir ZA, Mohd Shohaimi NA, Ahmad Rafaie H. Emerging polymeric-based material with photocatalytic functionality for sustainable technologies. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.06.009] [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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17
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Sabry N, Hussien MS, Yahia I. Eco-friendly synthesis of g-carbon nitride coated graphene nanocomposites for superior visible photodegradation of hydroquinone: Physicochemical mechanisms and photo-Fenton effect. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2021.113734] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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18
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Synergistic effect of KCl mixing and melamine/urea mixture in the synthesis of g-C3N4 for photocatalytic removal of tetracycline. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2021.11.036] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Wang J, Wei J. Facile preparation of graphitic carbon nitride nanosheet/agar composite hydrogels for removal of tetracycline via the synergy of adsorption and photocatalysis. NEW J CHEM 2022. [DOI: 10.1039/d1nj06227a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Compared with the BCN/agar composite hydrogel, the CNNS/agar 4 composite hydrogel exhibited a much higher photocatalytic activity for tetracycline degradation due to suppressive recombination of electrons and holes.
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Affiliation(s)
- Jingjing Wang
- School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, P. R. China
| | - Jun Wei
- School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, P. R. China
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20
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Asadzadeh Patehkhor H, Fattahi M, Khosravi-Nikou M. Synthesis and characterization of ternary chitosan-TiO 2-ZnO over graphene for photocatalytic degradation of tetracycline from pharmaceutical wastewater. Sci Rep 2021; 11:24177. [PMID: 34921173 PMCID: PMC8683447 DOI: 10.1038/s41598-021-03492-5] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 11/26/2021] [Indexed: 11/20/2022] Open
Abstract
Various nanocomposites of TiO2-ZnO, TiO2-ZnO/CS, and TiO2-ZnO/CS-Gr with different molar ratios were synthesized by sol-gel and ultrasound-assisted methods and utilized under UV irradiation to enhance the photocatalytic degradation of tetracycline. Characterization of prepared materials were carried out by XRD, FT-IR, FE-SEM, EDX and BET techniques. The TiO2-ZnO with the 1:1 molar ratio supported with 1:2 weight ratio CS-Gr (T1‒Z1/CS1‒Gr2 sample) appeared as the most effective material at the optimized operational conditions including the tetracycline concentration of 20 mg/L, pH = 4, catalyst dosage of 0.5 g/L, and 3 h of irradiation time. As expected, the graphene had a significant effect in improving degradation results. The detailed performances of the T1‒Z1/CS1‒Gr2 were compared with ternary nanocomposites from EDX and BET results as well as from the degradation viewpoint. This novel photocatalyst can be effective in actual pharmaceutical wastewater treatment considering the applied operational parameters.
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Affiliation(s)
- Hossein Asadzadeh Patehkhor
- grid.444962.90000 0004 0612 3650Chemical Engineering Department, Abadan Faculty of Petroleum Engineering, Petroleum University of Technology, Abadan, Iran
| | - Moslem Fattahi
- Chemical Engineering Department, Abadan Faculty of Petroleum Engineering, Petroleum University of Technology, Abadan, Iran.
| | - Mohammadreza Khosravi-Nikou
- grid.444962.90000 0004 0612 3650Department of Gas Engineering, Ahvaz Faculty of Petroleum, Petroleum University of Technology, Ahvaz, Iran
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21
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Effect of thermal program on structure–activity relationship of g-C3N4 prepared by urea pyrolysis and its application for controllable production of g-C3N4. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2021.122545] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Suyana P, Ganguly P, Nair BN, Pillai SC, Hareesh U. Structural and compositional tuning in g-C3N4 based systems for photocatalytic antibiotic degradation. CHEMICAL ENGINEERING JOURNAL ADVANCES 2021. [DOI: 10.1016/j.ceja.2021.100148] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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John A, Rajan MS, Thomas J. Carbon nitride-based photocatalysts for the mitigation of water pollution engendered by pharmaceutical compounds. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:24992-25013. [PMID: 33772713 DOI: 10.1007/s11356-021-13528-y] [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: 11/23/2020] [Accepted: 03/15/2021] [Indexed: 06/12/2023]
Abstract
In recent decades, the destructive impact of active pharmaceutical ingredients (API) present in surface and drinking water on aquatic and terrestrial life forms becomes a major concern of researchers. API like diclofenac (DCF), carbamazepine (CBZ), tetracycline (TC), and sulfamethoxazole (SME) found in water bodies cause antimicrobial resistance and are potent carcinogens and endocrine disruptors. Conventional wastewater treatment methods possess some drawbacks and were found to be insufficient for the effective removal of APIs. Visible light-assisted semiconductor photocatalysis has become an alternative choice for tackling this worse scenario. Graphitic carbon nitride, a metal-free visible light active semiconductor photocatalyst is an emerging hotspot nanomaterial whose practical utility in water purification is widely recognized. This review comes up with an insightful outlook on the panorama of recent progress in the field of g-C3N4-assisted photocatalytic systems for the eradication of APIs. In addition, the review summarizes various strategies adopted for the broad-spectrum utilization of visible light and the enhancement of charge separation of pristine g-C3N4. The mechanistic pathways followed by different pharmaceuticals during their photocatalytic degradation process were also briefly discussed.
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Affiliation(s)
- Anju John
- Research Department of Chemistry, Kuriakose Elias College, Mannanam, Kottayam, Kerala, 686561, India
| | - Mekha Susan Rajan
- Research Department of Chemistry, Kuriakose Elias College, Mannanam, Kottayam, Kerala, 686561, India
| | - Jesty Thomas
- Research Department of Chemistry, Kuriakose Elias College, Mannanam, Kottayam, Kerala, 686561, India.
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Arunachalapandi M, Roopan SM. Ultrasound/visible light-mediated synthesis of N-heterocycles using g-C3N4/Cu3TiO4 as sonophotocatalyst. RESEARCH ON CHEMICAL INTERMEDIATES 2021. [DOI: 10.1007/s11164-021-04461-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Liu Y, Ma Z. g-C3N4 Modified by meso-Tetrahydroxyphenylchlorin for Photocatalytic Hydrogen Evolution Under Visible/Near-Infrared Light. Front Chem 2020; 8:605343. [PMID: 33240861 PMCID: PMC7677346 DOI: 10.3389/fchem.2020.605343] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Accepted: 10/06/2020] [Indexed: 11/16/2022] Open
Abstract
A new photocatalyst denoted as mTHPC/pCN was prepared by modifying protonated graphitic carbon nitride (pCN) by meso-tetrahydroxyphenylchlorin (mTHPC). Relevant samples were characterized via various methods including zeta potential measurements, X-ray diffraction, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, N2 adsorption–desorption, transmission electron microscopy, ultraviolet-visible–near-infrared spectroscopy, electrochemical impedance spectroscopy, photocurrent response measurements, electron spin resonance spectroscopy, and phosphorescence spectroscopy. Compared with pCN, mTHPC/pCN shows enhanced absorption in the visible and near-infrared regions and thus higher photocatalytic activity in hydrogen evolution. A possible mechanism for mTHPC/pCN is proposed.
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Affiliation(s)
- Yanfei Liu
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP), Department of Environmental Science and Engineering, Fudan University, Shanghai, China
| | - Zhen Ma
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP), Department of Environmental Science and Engineering, Fudan University, Shanghai, China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai, China
- *Correspondence: Zhen Ma
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27
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Manganese ferrite/porous graphite carbon nitride composites for U(VI) adsorption from aqueous solutions. J Radioanal Nucl Chem 2020. [DOI: 10.1007/s10967-020-07281-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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28
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Ivan R, Pérez del Pino A, Yousef I, Logofatu C, György E. Laser synthesis of TiO2–carbon nanomaterial layers with enhanced photodegradation efficiency towards antibiotics and dyes. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112616] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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29
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Ganguly P, Mathew S, Clarizia L, Kumar R S, Akande A, Hinder SJ, Breen A, Pillai SC. Ternary Metal Chalcogenide Heterostructure (AgInS 2-TiO 2) Nanocomposites for Visible Light Photocatalytic Applications. ACS OMEGA 2020; 5:406-421. [PMID: 31956788 PMCID: PMC6964301 DOI: 10.1021/acsomega.9b02907] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 12/09/2019] [Indexed: 06/01/2023]
Abstract
Hybrid nanoarchitectures of AgInS2 and TiO2 photocatalysts were prepared by using a modified sol-gel method. The experimental results reveal that these nanocomposites display enhanced visible light absorption and effective charge carrier separation compared to their pristine parent samples (AgInS2 or TiO2). 0.5 wt % AgInS2 loading was found to be the optimum concentration for photocatalytic applications. More than 95% of doxycycline degradation was achieved within 180 min of solar light illumination. Similarly, the dopant concentrations at lower values (<2 wt %) exhibited 300 times higher H2 generation rate under visible light irradiation compared to AgInS2 and TiO2. The microbial strains (Escherichia coli and Staphylococcus aureus) exhibited a 99.999% reduction within half an hour of simulated solar light illumination. The computational investigation was employed to understand the structural, electronic, and the dielectric properties of AgInS2 and TiO2 composites. The improved photocatalytic results are explained as a result of the decreased rate of exciton recombination. The current investigation opens up new insights into the use of novel ternary heterostructure nanocomposites for improved visible light activity.
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Affiliation(s)
- Priyanka Ganguly
- Nanotechnology
and Bio-Engineering Research Group, Department of
Environmental Science, Centre for Precision Engineering, Materials and Manufacturing
Research (PEM), and Mathematical Modelling Research Group, Department of Health and Nutritional
Sciences, Institute of Technology Sligo, F91 YW50 Sligo, Ireland
| | - Snehamol Mathew
- Nanotechnology
and Bio-Engineering Research Group, Department of
Environmental Science, Centre for Precision Engineering, Materials and Manufacturing
Research (PEM), and Mathematical Modelling Research Group, Department of Health and Nutritional
Sciences, Institute of Technology Sligo, F91 YW50 Sligo, Ireland
| | - Laura Clarizia
- Dipartimento
di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università di Napoli Federico II, p. le V. Tecchio 80, 80125 Napoli, Italia
| | - Syam Kumar R
- Nanotechnology
and Bio-Engineering Research Group, Department of
Environmental Science, Centre for Precision Engineering, Materials and Manufacturing
Research (PEM), and Mathematical Modelling Research Group, Department of Health and Nutritional
Sciences, Institute of Technology Sligo, F91 YW50 Sligo, Ireland
| | - Akinlolu Akande
- Nanotechnology
and Bio-Engineering Research Group, Department of
Environmental Science, Centre for Precision Engineering, Materials and Manufacturing
Research (PEM), and Mathematical Modelling Research Group, Department of Health and Nutritional
Sciences, Institute of Technology Sligo, F91 YW50 Sligo, Ireland
| | - Steven J. Hinder
- The
Surface Analysis Laboratory, Faculty of Engineering and Physical Sciences, University of Surrey, GU2 7XH Guildford, Surrey, United Kingdom
| | - Ailish Breen
- Nanotechnology
and Bio-Engineering Research Group, Department of
Environmental Science, Centre for Precision Engineering, Materials and Manufacturing
Research (PEM), and Mathematical Modelling Research Group, Department of Health and Nutritional
Sciences, Institute of Technology Sligo, F91 YW50 Sligo, Ireland
| | - Suresh C. Pillai
- Nanotechnology
and Bio-Engineering Research Group, Department of
Environmental Science, Centre for Precision Engineering, Materials and Manufacturing
Research (PEM), and Mathematical Modelling Research Group, Department of Health and Nutritional
Sciences, Institute of Technology Sligo, F91 YW50 Sligo, Ireland
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Chen Z, Li S, Peng Y, Hu C. Tailoring aromatic ring-terminated edges of g-C3N4 nanosheets for efficient photocatalytic hydrogen evolution with simultaneous antibiotic removal. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00898b] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A promising “one stone three birds” route to enhance photocatalytic H2 production with simultaneous organic pollutant removal activity.
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Affiliation(s)
- Zhihong Chen
- Institute of Environmental Research at Greater Bay
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta
- Ministry of Education
- Guangzhou University
- Guangzhou 510006
| | - Shanshan Li
- Institute of Environmental Research at Greater Bay
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta
- Ministry of Education
- Guangzhou University
- Guangzhou 510006
| | - Yannan Peng
- Institute of Environmental Research at Greater Bay
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta
- Ministry of Education
- Guangzhou University
- Guangzhou 510006
| | - Chun Hu
- Institute of Environmental Research at Greater Bay
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta
- Ministry of Education
- Guangzhou University
- Guangzhou 510006
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One-step synthesis of few layers g-C3N4 with suitable band structure and enhanced photocatalytic activities. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.136613] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Phang SJ, Tan LL. Recent advances in carbon quantum dot (CQD)-based two dimensional materials for photocatalytic applications. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01452g] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This review presents up-to-date research findings and critical insights on trending topics of pristine CQDs and CQDs-based 2D nanomaterial composites.
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Affiliation(s)
- Sue Jiun Phang
- School of Engineering and Physical Sciences
- Heriot-Watt University Malaysia
- 62200 Putrajaya
- Malaysia
| | - Lling-Lling Tan
- School of Engineering and Physical Sciences
- Heriot-Watt University Malaysia
- 62200 Putrajaya
- Malaysia
- Multidisciplinary Platform of Advanced Engineering
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Ismael M, Wu Y, Taffa DH, Bottke P, Wark M. Graphitic carbon nitride synthesized by simple pyrolysis: role of precursor in photocatalytic hydrogen production. NEW J CHEM 2019. [DOI: 10.1039/c9nj00859d] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
g-C3N4 with structural defects and low polymerization synthesized by urea as the precursor for photocatalytic H2 production under visible light.
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Affiliation(s)
- Mohammed Ismael
- Institute of Chemistry
- Technical Chemistry
- Carl von Ossietzky University Oldenburg
- 26129 Oldenburg
- Germany
| | - Ying Wu
- Institute of Physical Chemistry
- Zhejiang Normal University
- Jinhua 321004
- China
| | - Dereje H. Taffa
- Institute of Chemistry
- Technical Chemistry
- Carl von Ossietzky University Oldenburg
- 26129 Oldenburg
- Germany
| | - Patrick Bottke
- Institute of Chemistry
- Technical Chemistry
- Carl von Ossietzky University Oldenburg
- 26129 Oldenburg
- Germany
| | - Michael Wark
- Institute of Chemistry
- Technical Chemistry
- Carl von Ossietzky University Oldenburg
- 26129 Oldenburg
- Germany
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Fabrication of V2O5/g-C3N4 heterojunction composites and its enhanced visible light photocatalytic performance for degradation of gaseous ortho-dichlorobenzene. J Taiwan Inst Chem Eng 2018. [DOI: 10.1016/j.jtice.2018.05.041] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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35
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Cui P, Hu Y, Zheng M, Wei C. Enhancement of visible-light photocatalytic activities of BiVO 4 coupled with g-C 3N 4 prepared using different precursors. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:32466-32477. [PMID: 30238256 DOI: 10.1007/s11356-018-3119-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2018] [Accepted: 08/31/2018] [Indexed: 06/08/2023]
Abstract
Graphitic-like carbon nitride (g-C3N4) photocatalyst was synthesized by a facile chemical pyrolysis method, which was built on the self-condensation of different precursors to generate g-C3N4, e.g., melamine, urea, and thiocarbamide. And the different precursors produced a great influence on the photocatalytic activities of g-C3N4. Heterojunctions of g-C3N4 and BiVO4 were synthesized using a facile solvent evaporation method. The formation of BiVO4/g-C3N4 composites were confirmed by XRD, FT-IR, SEM, XPS, and UV-Vis DRS. The photocatalytic activities for RhB degradation were evaluated under visible-light irradiation. The photocatalytic activity of g-C3N4 prepared by urea was higher than that of g-C3N4 prepared by melamine and thiocarbamide, which was attributed to its favorable dispersibility, larger specific surface area, and higher oxidation capacity. The heterojunction composites exhibited higher photocatalytic activity than pure g-C3N4 or BiVO4. The results showed obvious removal efficiency for RhB, and the optimal sample with a BiVO4 content of 10% exhibited higher efficiency than pure g-C3N4 and BiVO4, and 10 wt%BiVO4/CN-U showed the highest photocatalytic activity. The enhanced photocatalytic activity of BiVO4/g-C3N4 composite can be attributed to the intimate coupling between the two host substrates, resulting in an efficient charge separation.
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Affiliation(s)
- Peipei Cui
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, Guangzhou, 510006, People's Republic of China
| | - Yun Hu
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, Guangzhou, 510006, People's Republic of China.
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, People's Republic of China.
| | - Mengmeng Zheng
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, Guangzhou, 510006, People's Republic of China
| | - Chaohai Wei
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, Guangzhou, 510006, People's Republic of China
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, People's Republic of China
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Cu-Doped TiO2: Visible Light Assisted Photocatalytic Antimicrobial Activity. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8112067] [Citation(s) in RCA: 112] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Surface contamination by microbes is a major public health concern. A damp environment is one of potential sources for microbe proliferation. Smart photocatalytic coatings on building surfaces using semiconductors like titania (TiO2) can effectively curb this growing threat. Metal-doped titania in anatase phase has been proven as a promising candidate for energy and environmental applications. In this present work, the antimicrobial efficacy of copper (Cu)-doped TiO2 (Cu-TiO2) was evaluated against Escherichia coli (Gram-negative) and Staphylococcus aureus (Gram-positive) under visible light irradiation. Doping of a minute fraction of Cu (0.5 mol %) in TiO2 was carried out via sol-gel technique. Cu-TiO2 further calcined at various temperatures (in the range of 500–700 °C) to evaluate the thermal stability of TiO2 anatase phase. The physico-chemical properties of the samples were characterized through X-ray diffraction (XRD), Raman spectroscopy, X-ray photo-electron spectroscopy (XPS) and UV–visible spectroscopy techniques. XRD results revealed that the anatase phase of TiO2 was maintained well, up to 650 °C, by the Cu dopant. UV–vis results suggested that the visible light absorption property of Cu-TiO2 was enhanced and the band gap is reduced to 2.8 eV. Density functional theory (DFT) studies emphasize the introduction of Cu+ and Cu2+ ions by replacing Ti4+ ions in the TiO2 lattice, creating oxygen vacancies. These further promoted the photocatalytic efficiency. A significantly high bacterial inactivation (99.9999%) was attained in 30 min of visible light irradiation by Cu-TiO2.
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Pompon-like structured g-C3N4/ZnO composites and their application in visible light photocatalysis. RESEARCH ON CHEMICAL INTERMEDIATES 2018. [DOI: 10.1007/s11164-018-3528-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ren B, Wang T, Qu G, Deng F, Liang D, Yang W, Liu M. In situ synthesis of g-C 3N 4/TiO 2 heterojunction nanocomposites as a highly active photocatalyst for the degradation of Orange II under visible light irradiation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:19122-19133. [PMID: 29725923 DOI: 10.1007/s11356-018-2114-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Accepted: 04/23/2018] [Indexed: 06/08/2023]
Abstract
As a highly active photocatalyst, g-C3N4/TiO2 heterojunction nanocomposites were in situ synthesized by simple ultrasonic mixing and calcination by using TiO2 and melamine as precursors. The morphology and structure of the prepared photocatalysts were characterized by field emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Fourier-transform infrared spectroscopy, UV-Vis diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy. The photocatalytic activities of g-C3N4/TiO2 nanocomposites to degrade Orange II (AO7) under visible light irradiation were evaluated. Results showed that the photocatalytic rate of the prepared g-C3N4/TiO2 photocatalyst to degrade AO7 was about three times than that of pristine TiO2 and g-C3N4. The g-C3N4/TiO2 composite with a ratio of 1:4 had the highest degradation efficiency for AO7 solution. Its degradation efficiency under acidic conditions was significantly higher than that under alkaline conditions. The enhancement of photocatalytic activity can be attributed to the formation of heterojunctions between g-C3N4 and TiO2, which leads to rapid charge transfer and the efficient separation of photogenerated electron-hole pairs. The recycling experiment indicated that the photocatalyst of g-C3N4/TiO2 nanocomposites still maintained good photochemical stability and recyclability after five cycles; this finding was important for its practical applications. A series of free radical trapping experiments showed that •O2- played a crucial role in the degradation of AO7. Graphical Abstract ᅟ.
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Affiliation(s)
- Bin Ren
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China
| | - Tiecheng Wang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China
- Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, 712100, Shaanxi, People's Republic of China
| | - Guangzhou Qu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China.
- Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, 712100, Shaanxi, People's Republic of China.
| | - Fang Deng
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, 330063, Jiangxi, People's Republic of China
| | - Dongli Liang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China
- Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture, Yangling, 712100, Shaanxi, People's Republic of China
| | - Wenli Yang
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China
| | - Meishan Liu
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, Shaanxi, People's Republic of China
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