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Lu S, Liu H. Molecular Doping on Carbon Nitride for Efficient Photocatalytic Hydrogen Production. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:13331-13338. [PMID: 38872351 DOI: 10.1021/acs.langmuir.4c01115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2024]
Abstract
Molecular doping is an innovative approach to modify the electronic configuration of carbon nitride (CN) photocatalysts, enhancing visible light absorption and optimizing the recombination of electron-hole pairs in photocatalytic H2 generation. Unlike the conventional heteroatom incorporation strategy, molecular doping offers a more effective means of structure optimization and conjugated framework. This Perspective studies recent advancements in benzene-ring doping for CN, emphasizing the correlation between structure and photocatalytic activity. The advantages and disadvantages of molecular doping in CN are thoroughly demonstrated, underscoring the importance of utilizing molecular doping to fine-tune both electronic and physical structures for enhanced photocatalytic efficacy. Insights are provided on strategies to address limitations and explore new prospects in the field of molecular doping methodologies.
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Affiliation(s)
- Shun Lu
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
| | - Hong Liu
- Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
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2
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Athar M, Rasool Z, Muneer M, M. Altass H, Althagafi II, Ahmed SA. Fabrication of Direct Z-Scheme CoNiWO 4/Ph-gC 3N 4 Heterocomposites: Enhanced Photodegradation of Bisphenol A and Anticancer Activity. ACS OMEGA 2023; 8:38272-38287. [PMID: 37867713 PMCID: PMC10586185 DOI: 10.1021/acsomega.3c04653] [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: 06/29/2023] [Accepted: 09/15/2023] [Indexed: 10/24/2023]
Abstract
Photocatalysis is realized by the design of a visible-light-active catalyst with robust redox capacity and broad absorption. In this study, a series of novel Z-scheme CoNiWO4/Ph-gC3N4 photocatalysts are synthesized to improve their redox property and photocatalytic activity toward broad visible light absorption. An intimate stable heterojunction is made between cobalt-nickel tungstate (CoNiWO4) and phenyl-doped graphitic carbon nitride (Ph-gC3N4), and its physicochemical properties are studied. The bifunctional properties of all of the synthesized materials were assessed by studying the decomposition of bisphenol A (BPA) and methyl orange (MO) dye as model pollutants, followed by an evaluation of their anticancer activity on human lung cancer cell lines. The photocatalyst with 20 wt % CoNiWO4 heterocomposite showed an enhanced response toward the removal of cancerous cells. The synthesized pristine CoNiWO4 and Ph-gC3N4 exhibit well-matched band structures and, hence, make it easier to create a Z-scheme heterocomposite. This may increase the lifetime of photoinduced charge carriers with a high redox power, thereby improving their photocatalytic and anticancer activity. An extensive analysis of the mechanism demonstrates that hydroxyl radicals (•OH) and superoxide radical anions (•O2-) are responsible for the degradation of organic compounds via Z-scheme charge transfer approach. These findings point toward a new route for creating effective Co-Ni tungstate-based direct Z-scheme photocatalysts for various redox processes, particularly the mineralization of resistant organic molecules.
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Affiliation(s)
| | - Ziyaur Rasool
- Department
of Chemistry, Aligarh Muslim University, Aligarh 202002, India
| | - Mohammad Muneer
- Department
of Chemistry, Aligarh Muslim University, Aligarh 202002, India
| | - Hatem M. Altass
- Department
of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, Makkah 21955, Saudi Arabia
| | - Ismail I. Althagafi
- Department
of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, Makkah 21955, Saudi Arabia
| | - Saleh A. Ahmed
- Department
of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, Makkah 21955, Saudi Arabia
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3
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Warshagha MZA, Muneer M, Althagafi II, Ahmed SA. Highly efficient and stable AgI-CdO nanocomposites for photocatalytic and antibacterial activity. RSC Adv 2023; 13:5013-5026. [PMID: 36777948 PMCID: PMC9909248 DOI: 10.1039/d2ra07626h] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 01/30/2023] [Indexed: 02/11/2023] Open
Abstract
For the last several decades, semiconducting materials and nanocomposites have received a lot of interest in generating highly efficient photocatalysts to destroy organic pollutants and eradicate bacteria. This study uses a simple deposition and precipitation approach at ambient temperature to create a unique and efficient AgI-CdO heterojunction. DRS, IR, SEM, EDS, XRD, EIS, and TEM were utilized to identify the material. SEM and TEM investigation depict the completely spherical, hexagonal forms and zigzag cubes for synthesized AgI-CdO. The EDX spectra reveal the presence of Ag, I, Cd, and O elements without impurity peaks showing that the prepared samples are highly pure. The activity of the synthesized materials was tested by degrading two different chromophoric dyes and a drug derivative (paracetamol) in an aqueous suspension under visible light. In addition, the activity of the most active catalyst was compared with Degussa P25, Fenton's reagent, and under sunlight for degradation of MB and RhB under similar conditions. Photolysis of paracetamol was also looked at using HPLC to identify intermediates formed in the photo-oxidation process. In addition, antibacterial activity was also investigated with the synthesized CdO-AgI nanocomposite in vitro against human pathogenic bacterial strains and compared with that of pure materials like AgI and standard ampicillin. The results showed excellent activity with the composite material, which could be due to the higher surface areas and the interactions between AgI and CdO nanoparticles. Quenching investigations revealed O2˙- and holes are principal reactive species. A viable photocatalytic degradation mechanism for organic pollutant elimination over the AgI-CdO nanocomposite has been sketched out based on the obtained results.
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Affiliation(s)
| | - M. Muneer
- Department of Chemistry, Aligarh Muslim UniversityAligarh-202002India
| | - Ismail I. Althagafi
- Department of Chemistry, Faculty of Applied Sciences, Umm Al-Qura UniversityMakkah 21955Saudi Arabia
| | - Saleh A. Ahmed
- Department of Chemistry, Faculty of Applied Sciences, Umm Al-Qura UniversityMakkah 21955Saudi Arabia
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Athar MS, Muneer M. Enhanced photodegradation of organic contaminants using V-ZnSQDs@TiO2 photocatalyst in an aqueous medium. Photochem Photobiol Sci 2022; 22:695-712. [PMID: 36495409 DOI: 10.1007/s43630-022-00345-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Accepted: 11/16/2022] [Indexed: 12/14/2022]
Abstract
Vanadium-doped zinc sulfide quantum dots complexed with TiO2 have been designed using the sol-gel technique and characterized using analytical techniques, such as X-ray diffraction analysis (XRD), UV-Vis diffuse reflectance spectra (DRS), Fourier transforms Infra Red (FTIR), Brunauer-Emmett-Teller analysis (BET), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), and transmission electron microscopy (TEM). The X-ray diffraction analysis of the composite material showed sharp peaks corresponding to both TiO2 and ZnSQDs. The FTIR analysis exhibits a strong and broad absorption at 807 cm-1 indicating the assimilation of vanadium metal in the ZnSQDs lattice. The DRS spectra showed a bathochromic shift of 25 nm in the synthesized V-ZnSQDs@TiO2 composite compared with the pure sample. The photocatalytic performance of the synthesized composite was tested by studying the degradation of two different chromophoric organic dyes, rhodamine B (RhB), methylene blue (MB) and a drug derivative paracetamol (PCM) in aqueous suspension under UV-light illumination. Among the synthesized materials, the composite (V-ZnSQDs@TiO2) was established to be more active than the pure ZnSQDs, TiO2, and V-ZnSQDs for the degradation of compounds under investigation. The activity of the synthesized catalyst was also tested for the mineralization of all compounds by measuring the depletion in total organic carbon (TOC) at different irradiation times. The results showed that the catalyst degrades the compounds and mineralizes them efficiently. The primary reactive species involved in the photodegradation reaction were determined by quenching studies, terephthalic acid, and NBT probe methods. A probable mechanistic pathway for the decomposition of compounds has been proposed.
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5
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Warshagha MA, Muneer M. Direct Z-Scheme AgBr/β-MnO 2 Photocatalysts for Highly Efficient Photocatalytic and Anticancer Activity. ACS OMEGA 2022; 7:30171-30183. [PMID: 36061726 PMCID: PMC9434753 DOI: 10.1021/acsomega.2c03260] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 08/05/2022] [Indexed: 05/28/2023]
Abstract
The preparation of visible light-responsive efficient photocatalysts for removing organic contaminants from water and killing cancer cells has gotten a lot of attention due to the growing global concern. In this study, we have successfully fabricated an efficient AgBr/β-MnO2 nanocomposite via a facile deposition and precipitation method at room temperature. Techniques such as XRD, SEM-EDS, TEM, DRS, PL, EIS, ESR, and FTIR were used to determine the crystalline, structural, morphological, optical, and other properties. The SEM and TEM analyses reveal that AgBr NPs are decorated on the surface of β-MnO2, which possesses rods with a sphere-like structure for AgBr/β-MnO2. The EDX analysis confirms the existence of Mn, O, Ag, and Br elements in the nanocomposites without an extra peak, indicating that the synthesized samples are highly pure. The high photocatalytic performance of AgBr/β-MnO2 could be attributed to the formation of Ag NPs and the construction of the Z-scheme heterojunction between AgBr and β-MnO2. This may enhance fast light absorption and efficient photogenerated (e-/h+) pairs, as indicated by EIS and photoluminescence measurements, which in turn achieved high activity for the decomposition of MB (97%, in 12 min), RhB (98.9%, in 9 min), and paracetamol (80%, in 180 min), respectively. The kinetic model study proposed that the first-order model showed a better fit than the zero- and second-order for the photocatalytic decolorization of RhB dye. XRD analysis of 0.2 AgBr/β-MnO2 before and after recycling confirms the high stability of the catalyst. HPLC results showed that no detectable by-products are produced through the decomposition of paracetamol. Interestingly, 0.2 AgBr/β-MnO2 nanocomposites showed visible light-induced anticancer activity against A549 cancer cell lines. The mechanistic degradation pathway has been proposed using the involvement of active species like superoxide radicals (-•O2) and photoinduced holes (h+). The proposed work focuses on synthesizing effective photocatalysts in a less hazardous environment with superior biological activity.
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Lin J, Tian W, Zhang H, Duan X, Sun H, Wang H, Fang Y, Huang Y, Wang S. Carbon nitride-based Z-scheme heterojunctions for solar-driven advanced oxidation processes. JOURNAL OF HAZARDOUS MATERIALS 2022; 434:128866. [PMID: 35413519 DOI: 10.1016/j.jhazmat.2022.128866] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 03/25/2022] [Accepted: 04/02/2022] [Indexed: 06/14/2023]
Abstract
Solar-driven advanced oxidation processes (AOPs) via direct photodegradation or indirect photocatalytic activation of typical oxidants, such as hydrogen peroxide (H2O2), peroxymonosulfate (PMS), and peroxydisulfate (PDS), have been deemed to be an efficient technology for wastewater remediation. Artificial Z-scheme structured materials represent a promising class of photocatalysts due to their spatially separated charge carriers and strong redox abilities. Herein, we summarize the development of metal-free graphitic carbon nitride (g-C3N4, CN)-based direct and indirect Z-scheme photocatalysts for solar-driven AOPs in removing organic pollutants from water. In the work, the classification of AOPs, definition and validation of Z-schemes are summarized firstly. The innovative engineering strategies (e.g., morphology and dimensionality control, element doping, defect engineering, cocatalyst loading, and tandem Z-scheme construction) over CN-based direct Z-scheme structure are then examined. Rational design of indirect CN-based Z-scheme systems using different charge mediators, such as solid conductive materials and soluble ion pairs, is further discussed. Through examining the relationship between the Z-scheme structure and activity (charge transfer and separation, light absorption, and reaction kinetics), we aim to provide more insights into the construction strategies and structure modification on CN-based Z-schemes towards improving their catalytic performances in AOPs. Lastly, limitations, challenges, and perspectives on future development in this emerging field are proposed.
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Affiliation(s)
- Jingkai Lin
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, North Terrace, Adelaide, SA 5005, Australia
| | - Wenjie Tian
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, North Terrace, Adelaide, SA 5005, Australia
| | - Huayang Zhang
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, North Terrace, Adelaide, SA 5005, Australia.
| | - Xiaoguang Duan
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, North Terrace, Adelaide, SA 5005, Australia
| | - Hongqi Sun
- School of Science, Edith Cowan University, 270 Joondalup Drive, Joondalup, WA 6027, Australia
| | - Hao Wang
- Center for Future Materials, University of Southern Queensland, Toowoomba 4350, Australia
| | - Yanfen Fang
- College of Biological and Pharmaceutical Sciences, Three Gorges University, Hubei 443002, China
| | - Yingping Huang
- College of Biological and Pharmaceutical Sciences, Three Gorges University, Hubei 443002, China
| | - Shaobin Wang
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, North Terrace, Adelaide, SA 5005, Australia.
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Zhao Y, Wang L, Malpass-Evans R, McKeown NB, Carta M, Lowe JP, Lyall CL, Castaing R, Fletcher PJ, Kociok-Köhn G, Wenk J, Guo Z, Marken F. Effects of g-C 3N 4 Heterogenization into Intrinsically Microporous Polymers on the Photocatalytic Generation of Hydrogen Peroxide. ACS APPLIED MATERIALS & INTERFACES 2022; 14:19938-19948. [PMID: 35466666 PMCID: PMC9073839 DOI: 10.1021/acsami.1c23960] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Accepted: 04/07/2022] [Indexed: 06/14/2023]
Abstract
Graphitic carbon nitride (g-C3N4) is known to photogenerate hydrogen peroxide in the presence of hole quenchers in aqueous environments. Here, the g-C3N4 photocatalyst is embedded into a host polymer of intrinsic microporosity (PIM-1) to provide recoverable heterogenized photocatalysts without loss of activity. Different types of g-C3N4 (including Pt@g-C3N4, Pd@g-C3N4, and Au@g-C3N4) and different quenchers are investigated. Exploratory experiments yield data that suggest binding of the quencher either (i) directly by adsorption onto the g-C3N4 (as shown for α-glucose) or (ii) indirectly by absorption into the microporous polymer host environment (as shown for Triton X-100) enhances the overall photochemical H2O2 production process. The amphiphilic molecule Triton X-100 is shown to interact only weakly with g-C3N4 but strongly with PIM-1, resulting in accumulation and enhanced H2O2 production due to the microporous polymer host.
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Affiliation(s)
- Yuanzhu Zhao
- Department
of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK
| | - Lina Wang
- Department
of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK
| | - Richard Malpass-Evans
- EaStCHEM
School of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster
Road, Edinburgh, Scotland EH9 3JF, UK
| | - Neil B. McKeown
- EaStCHEM
School of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster
Road, Edinburgh, Scotland EH9 3JF, UK
| | - Mariolino Carta
- Department
of Chemistry, Swansea University, College
of Science, Grove Building, Singleton Park, Swansea SA2 8PP, UK
| | - John P. Lowe
- University
of Bath, Materials & Chemical Characterisation
Facility, MC, Bath BA2 7AY, UK
| | - Catherine L. Lyall
- University
of Bath, Materials & Chemical Characterisation
Facility, MC, Bath BA2 7AY, UK
| | - Rémi Castaing
- University
of Bath, Materials & Chemical Characterisation
Facility, MC, Bath BA2 7AY, UK
| | - Philip J. Fletcher
- University
of Bath, Materials & Chemical Characterisation
Facility, MC, Bath BA2 7AY, UK
| | - Gabriele Kociok-Köhn
- University
of Bath, Materials & Chemical Characterisation
Facility, MC, Bath BA2 7AY, UK
| | - Jannis Wenk
- Department
of Chemical Engineering and Water Innovation Research Centre, WIRC, University of Bath, Claverton Down, Bath BA2 7AY, UK
| | - Zhenyu Guo
- Department
of Chemical Engineering, Imperial College
London, South Kensington Campus, London, SW7 2AZ, UK
| | - Frank Marken
- Department
of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK
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8
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One-pot hydrothermal synthesis of a double Z-scheme g-C 3N 4/AgI/β-AgVO 3 ternary nanocomposite for efficient degradation of organic pollutants and DPC-Cr(VI) complex under visible-light irradiation. Photochem Photobiol Sci 2022; 21:1371-1386. [PMID: 35507304 DOI: 10.1007/s43630-022-00226-y] [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: 12/30/2021] [Accepted: 04/06/2022] [Indexed: 10/18/2022]
Abstract
The Z-scheme photocatalytic system provides a promising way to achieve significant photodegradation efficiency. The work embodied here describes the synthesis of highly efficient double Z-scheme g-C3N4/AgI/β-AgVO3 (g-CNAB) ternary nanocomposite using a one-pot hydrothermal route. The optical properties, phase structure, and morphology of the synthesized samples were investigated using UV-visible diffuse-reflectance spectroscopy (UV-Vis DRS), X-ray diffraction, and scanning electron microscopy, respectively. The transmission electron microscopy investigation revealed that synthesized composite material represents close interfacial interactions. X-ray photoelectron spectroscopy analysis confirms the presence of all the elements in the synthesized ternary nanocomposite materials. The photocatalytic performance of as-prepared photocatalysts has been systematically investigated using the photodegradation of a variety of pollutants, including Rhodamine B, Ciprofloxacin, and 1,5-diphenylcarbazide-Cr(VI) [DPC-Cr(VI)] complex under visible-light irradiation. Among all synthesized materials, such as g-C3N4, AgI, β-AgVO3, and ternary nanocomposites with varying loading of β-AgVO3 [g-CNAB(0.5, 1.0, 1.5, 2.0)], the photocatalyst g-CNAB(1.5) nanocomposite achieved a remarkably high photocatalytic efficiency. The quenching impact of several scavengers revealed that reactive species such as superoxide anion radical (O2·-) and hydroxyl radical (·OH) are significant in the degradation of various contaminants. Based on the characterization and application, a plausible photocatalytic mechanism has been sketched out to determine the reaction pathways involved in the degradation of pollutants present in the aqueous medium.
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Van Pham V, Truong TK, Le HV, Nguyen HT, Tong HD, Cao TM. Enhancing Green Product Generation of Photocatalytic NO Oxidation: A Case of WO 3 Nanoplate/g-C 3N 4 S-Scheme Heterojunction. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:4138-4146. [PMID: 35324210 DOI: 10.1021/acs.langmuir.2c00371] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Nitric oxide (NO) removal by photocatalytic oxidation over g-C3N4 has achieved more efficient results. However, there is a concern about the high NO-to-NO2 conversion yield of products, which is not suitable for the photocatalytic NO reaction. In this study, we modify g-C3N4 by WO3 nanoplates for the first time for photocatalytic NO oxidation over a WO3/g-C3N4 composite to enhance the green product selectivity under atmospheric conditions. The results indicate that the photocatalytic efficiency for NO removal by the WO3/g-C3N4 composite is drastically improved and achieves 52.5%, which is approximately 2.1 times higher than that of pure g-C3N4. Significantly, the green product (NO3-) selectivity of the WO3/g-C3N4 composite is 8.7 times higher than that of pure g-C3N4, and the selectivity remained high even after five cycles of photocatalytic tests. We also conclude that the enhanced green product selectivity of photocatalytic NO oxidation by the WO3/g-C3N4 composite is due to the separation and acceleration of the photogenerated charges of the WO3/g-C3N4 S-scheme heterojunction.
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Affiliation(s)
- Viet Van Pham
- University of Science, VNU-HCM, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City 700000, Vietnam
- Vietnam National University Ho Chi Minh City, Thu Duc, Ho Chi Minh City 700000, Vietnam
| | - Thao Kim Truong
- University of Science, VNU-HCM, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City 700000, Vietnam
- Vietnam National University Ho Chi Minh City, Thu Duc, Ho Chi Minh City 700000, Vietnam
| | - Hai Viet Le
- University of Science, VNU-HCM, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City 700000, Vietnam
- Vietnam National University Ho Chi Minh City, Thu Duc, Ho Chi Minh City 700000, Vietnam
| | - Hoang Thai Nguyen
- University of Science, VNU-HCM, 227 Nguyen Van Cu Street, District 5, Ho Chi Minh City 700000, Vietnam
- Vietnam National University Ho Chi Minh City, Thu Duc, Ho Chi Minh City 700000, Vietnam
| | - Hien Duy Tong
- Faculty of Engineering, Vietnamese-German University (VGU), Le Lai Street, Hoa Phu Ward, Thu Dau Mot City, Binh Duong Province 7500, Vietnam
| | - Thi Minh Cao
- HUTECH University, 475A Dien Bien Phu Street, Binh Thanh District, Ho Chi Minh City 700000, Vietnam
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Wang B, Wang Z, Bai C, Yang H, Sun H, Lu G, Liang S, Liu Z. Synergistic Generation of Radicals by Formic Acid/H 2O 2/g-C 3N 4 Nanosheets for Ultra-efficient Oxidative Photodegradation of Rhodamine B. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:2872-2884. [PMID: 35195422 DOI: 10.1021/acs.langmuir.1c03201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Water pollution is a global challenge endangering people's health. In this work, an ultra-efficient photodegradation system of Rhodamine B (RhB) has been established using a graphitic carbon nitride nanosheet (CNNS) as the semiconductor photocatalyst, from which energy is harvested on both the conduction band and valence band by formic acid and hydrogen peroxide, respectively. The optimized FA/H2O2/CNNS system increases the apparent photodegradation rate of RhB by 25 folds, from 0.0198 to 0.4975 min-1. Through a comprehensive investigation with reactive oxygen species scavengers, electron paramagnetic resonance, high-performance liquid chromatography-mass spectrometry, etc., an oxidative mechanism for RhB photodegradation has been proposed, which combines enhanced charge carrier migration and synergistic generation of multiple radicals. Comparable performance improvements have also been observed for similar systems with different semiconductors, suggesting that such a catalytic system could afford a general approach to enhance semiconductor-catalyzed photodegradation.
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Affiliation(s)
- Bingdi Wang
- Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University, Changchun, Jilin 130022, P. R. China
| | - Zhida Wang
- Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University, Changchun, Jilin 130022, P. R. China
| | - Chengkun Bai
- Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University, Changchun, Jilin 130022, P. R. China
| | - Haoqi Yang
- Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University, Changchun, Jilin 130022, P. R. China
- Roll Forging Research Institute, College of Materials Science and Engineering, Jilin University, Changchun, Jilin 130022, P. R. China
| | - Hang Sun
- Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University, Changchun, Jilin 130022, P. R. China
| | - Guolong Lu
- Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University, Changchun, Jilin 130022, P. R. China
| | - Song Liang
- Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University, Changchun, Jilin 130022, P. R. China
| | - Zhenning Liu
- Key Laboratory of Bionic Engineering (Ministry of Education), College of Biological and Agricultural Engineering, Jilin University, Changchun, Jilin 130022, P. R. China
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11
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Liu C, Chen G, Zhang Z, You Y. Expanding the Conjugate Structure of Polymeric Carbon Nitride for Enhanced Light Absorption and Photothermal Conversion. Macromol Rapid Commun 2021; 42:e2100502. [PMID: 34587316 DOI: 10.1002/marc.202100502] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 09/26/2021] [Indexed: 11/08/2022]
Abstract
The development of efficient and inexpensive materials for light energy conversion is very important for achieving sustainable energy supply and carbon neutrality. Polymeric carbon nitride has become a promising material for light energy conversion due to its advantages of simple preparation and high physical and chemical stability. However, the pristine polymeric carbon nitride only absorbs light with a wavelength of less than 450 nm, and the energy conversion for low-energy photons is very limited. Here, by introducing the pyromellitic dianhydride component to construct an in-plane heterostructure, the conjugated structure of polymeric carbon nitride is successfully expanded. This in-plane carbon nitride-carbon nanoribbon (C3 N4 -C) heterostructure has an ultrawide absorption range from 200 to 2000 nm. Compared with the original material, the photothermal conversion performance of C3 N4 -C is significantly improved under the irradiation of Xe lamp or infrared laser. Furthermore, C3 N4 -C exhibits good potential for synergistic photothermal and chemotherapy. This work provides a simple strategy to construct expanded conjugate structure for improved light absorption and energy conversion materials based on polymeric carbon nitride.
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Affiliation(s)
- Cheng Liu
- Department of Urologic oncology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, 230026, P. R. China
| | - Guang Chen
- Department of Pharmacy, The First Affiliated Hospital of USTC, Division of Life Science and Medicine; Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Ze Zhang
- Department of Pharmacy, The First Affiliated Hospital of USTC, Division of Life Science and Medicine; Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Yezi You
- Department of Pharmacy, The First Affiliated Hospital of USTC, Division of Life Science and Medicine; Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
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12
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Manea YK, Khan AM, Wani AA, Qashqoosh MT, Shahadat M, Salem MA. Hydrothermally synthesized mesoporous CS-g-PA@TSM functional nanocomposite for efficient photocatalytic degradation of Ciprofloxacin and treatment of metal ions. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116144] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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13
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Abbo HS, Gupta KC, Khaligh NG, Titinchi SJJ. Carbon Nanomaterials for Wastewater Treatment. CHEMBIOENG REVIEWS 2021. [DOI: 10.1002/cben.202100003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Hanna S. Abbo
- University of the Western Cape Department of Chemistry Cape Town South Africa
- University of Basrah Department of Chemistry Basrah Iraq
| | - K. C. Gupta
- Indian Institute of Technology Polymer Research Laboratory Department of Chemistry 247 667 Roorkee India
| | - Nader G. Khaligh
- University of Malaya Nanotechnology and Catalysis Research Center Institute of Postgraduate Studies Kuala Lumpur Malaysia
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14
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Soltaninejad V, Ahghari MR, Taheri-Ledari R, Maleki A. Bifunctional PVA/ZnO/AgI/Chlorophyll Nanocomposite Film: Enhanced Photocatalytic Activity for Degradation of Pollutants and Antimicrobial Property under Visible-Light Irradiation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:4700-4713. [PMID: 33821643 DOI: 10.1021/acs.langmuir.1c00501] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Here, poly(vinyl alcohol) (PVA) with numerous hydroxyl groups has been applied as a suitable substrate for efficient formation of zinc oxide (ZnO) nanoparticles with a flower shape (confirmed by electron-scanning microscopy), silver iodide (AgI) nanoparticles, and chlorophyll (Chl), as a natural-based photocatalyst (PVA/ZnO/AgI/Chl). First, an efficient preparation route for the PVA/ZnO/AgI/Chl nanophotocatalyst is presented starting from the extraction of Chl from fresh spinach. Then, the catalytic role of the prepared composite is precisely investigated in degradation of methylene blue (MB). The effects of visible-light irradiation, different contact times, and the employed ingredients on the architecture of the PVA/ZnO/AgI/Chl are screened in the degradation process of MB. It is demonstrated that the best result (MB removal efficiency ca. 95.5%) is achieved by applying the visible-light irradiation using a LED lamp (70 W, λ = 425 nm) for a 60 min duration. Moreover, the photocatalytic performance of PVA/ZnO/AgI/Chl has been further confirmed by degradation of Congo red (CR) (ca. 92%, in 150 min) and 4-chlorophenol (4-CP) (88%, in 270 min), as well. As another function of the prepared PVA/ZnO/AgI/Chl composite, a substantial antibacterial property against human bacterial pathogens such as Staphylococcus aureus and Escherichia coli as Gram-positive and Gram-negative bacteria has been noticed, studied by agar diffusion cup plate and colony methods. The zones of inhibition have been evaluated ca. 20 and 12 mm for the S. aureus and E. coli cell lines, respectively. Finally, a great synergy between the prepared composite and the visible light has been observed through the examination of the live bacteria: 99.6% for S. aureus and 99.8% for E. coli in the presence of visible light, after the subjection of PVA/ZnO/AgI/Chl particles to the bacteria, verified by the colony counter method.
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Affiliation(s)
- Vahhab Soltaninejad
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran 16846-13114, Iran
| | - Mohammad Reza Ahghari
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran 16846-13114, Iran
| | - Reza Taheri-Ledari
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran 16846-13114, Iran
| | - Ali Maleki
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran 16846-13114, Iran
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15
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Song T, Zhang X, Yang P. Bifunctional Nitrogen-Doped Carbon Dots in g-C 3N 4/WO x Heterojunction for Enhanced Photocatalytic Water-Splitting Performance. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:4236-4247. [PMID: 33793245 DOI: 10.1021/acs.langmuir.1c00210] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A novel metal-free all-solid-state z-scheme g-C3N4/NCDs/WOx photocatalyst was fabricated using nitrogen-doped carbon dots (NCDs) as the electron mediator. As-prepared sandwich-structured composites displayed enhanced visible and NIR light photocatalytic activity. Under visible light irradiation, the hydrogen evolution rate reached 3.27 mmol g-1 h-1, which increased to roughly seven times higher than that of pure g-C3N4 and roughly twice that of g-C3N4/NCDs or g-C3N4/WOx binary heterojunctions. The apparent quantum efficiency is 7.58% at 420 nm. The localized surface plasmon resonance effect of WOx and the up-converted photoluminescence property of NCDs enhanced the utilization efficiency of NIR light together. In addition, the matched energy band structures of WOx and g-C3N4 as well as the effective electron conductor (NCDs) between them accelerate electron transfer at the interface. The all-solid-state z-scheme g-C3N4/NCDs/WOx photocatlyst was confirmed by a series of characterizations and experiment results. This report offered new insights into constructing an efficient all-solid-state z-scheme photocatalyst to be applied during the photocatalytic water-splitting reaction in the visible and NIR light regions.
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Affiliation(s)
- Tong Song
- School of Material Science & Engineering, University of Jinan, Jinan 250022, P R China
| | - Xiao Zhang
- W/A School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, Perth WA6845, Australia
| | - Ping Yang
- School of Material Science & Engineering, University of Jinan, Jinan 250022, P R China
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16
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Vinoth S, Rajaitha PM, Pandikumar A. Modulating photoelectrochemical water splitting performance by constructing a type-II heterojunction between g-C3N4 and BiOI. NEW J CHEM 2021. [DOI: 10.1039/d0nj05384h] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
g-C3N4/BiOI type-II heterojunction prepared by ultrasonically aided hydrothermal method exhibits high stability during PEC water splitting for up to 6000 s at 1.23 V vs. RHE.
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Affiliation(s)
- S. Vinoth
- Electro Organic and Materials Electrochemistry Division, CSIR-Central Electrochemical Research Institute
- Karaikudi – 630003
- India
- Academy of Scientific and Innovative Research (AcSIR)
- Ghaziabad – 201002
| | - P. Mary Rajaitha
- Electro Organic and Materials Electrochemistry Division, CSIR-Central Electrochemical Research Institute
- Karaikudi – 630003
- India
| | - A. Pandikumar
- Electro Organic and Materials Electrochemistry Division, CSIR-Central Electrochemical Research Institute
- Karaikudi – 630003
- India
- Academy of Scientific and Innovative Research (AcSIR)
- Ghaziabad – 201002
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