1
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Tian Y, Xu L, Ning S, Wang C, Wang Y, Jiang H, Yuan D, Yu F, Liu Y. Ti 3C 2T x/Cd 0.8Zn 0.2S composites constructed of Schottky heterojunction for efficient photocatalytic reduction of U(VI). J Colloid Interface Sci 2024; 677:470-480. [PMID: 39098280 DOI: 10.1016/j.jcis.2024.07.238] [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: 05/23/2024] [Revised: 07/27/2024] [Accepted: 07/30/2024] [Indexed: 08/06/2024]
Abstract
Photocatalysis has emerged as a extremely promising green technology for the treatment of uranium-containing wastewater. This study focuses on the fabrication of Ti3C2Tx/Cd0.8Zn0.2S composites with Schottky junctions through the in-situ growth of Cd0.8Zn0.2S on Ti3C2Tx nanosheets, enabling efficient photoreduction of U(VI) without the requirement of sacrificial agents. The results demonstrate that the Ti3C2Tx/Cd0.8Zn0.2S composites achieve remarkable 99.48 % U(VI) reduction efficiency within 60 min in a 100 ppm uranium solution. Furthermore, the removal rate remains above 90 % after five cycles. The formation of Schottky heterojunctions by Ti3C2Tx and Cd0.8Zn0.2S leads to the generation of an internal electric field that significantly promotes the rapid separation and transfer of photogenerated carriers, thereby enhancing the photocatalytic reduction efficiency of Ti3C2Tx/Cd0.8Zn0.2S-3:100 (TC/CZS-3:100). A considerable amount of electrons accumulate on Ti3C2Tx via the Schottky barrier, effectively facilitating the reduction of U(VI) to U(IV). As a co-catalyst, Ti3C2Tx enhances the photocatalytic performance and stability of Cd0.8Zn0.2S. Moreover, the practical application in the waste liquid of rare earth tailings reveals that the removal rate can be as high as 91.24 %. This research is of significant value in the development of effective photocatalysts for the elimination of uranium from wastewater.
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Affiliation(s)
- Yun Tian
- Jiangxi Province Key Laboratory of Functional Organic Polymers, East China University of Technology, Nanchang 330013, Jiangxi, China
| | - Luowen Xu
- Jiangxi Province Key Laboratory of Functional Organic Polymers, East China University of Technology, Nanchang 330013, Jiangxi, China
| | - Shuo Ning
- Jiangxi Province Key Laboratory of Functional Organic Polymers, East China University of Technology, Nanchang 330013, Jiangxi, China
| | - Changfu Wang
- Jiangxi Province Key Laboratory of Functional Organic Polymers, East China University of Technology, Nanchang 330013, Jiangxi, China
| | - Yun Wang
- Jiangxi Province Key Laboratory of Functional Organic Polymers, East China University of Technology, Nanchang 330013, Jiangxi, China
| | - Hao Jiang
- Jiangxi Province Key Laboratory of Functional Organic Polymers, East China University of Technology, Nanchang 330013, Jiangxi, China
| | - Dingzhong Yuan
- Jiangxi Province Key Laboratory of Functional Organic Polymers, East China University of Technology, Nanchang 330013, Jiangxi, China
| | - Fengtao Yu
- Jiangxi Province Key Laboratory of Functional Organic Polymers, East China University of Technology, Nanchang 330013, Jiangxi, China
| | - Yan Liu
- Jiangxi Province Key Laboratory of Functional Organic Polymers, East China University of Technology, Nanchang 330013, Jiangxi, China.
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2
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Cao H, Yin Z, Dong X, Li Y, Yang Y, Qiu J, Yang Z, Song Z. Enhancing the near-infrared upconversion photocatalytic activity of ZnO/Bi 3Ti 2O 8F:Yb 3+, Er 3+ by modulating the internal electric field through Z-scheme heterojunction construction. J Colloid Interface Sci 2024; 674:79-91. [PMID: 38917714 DOI: 10.1016/j.jcis.2024.06.161] [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: 04/26/2024] [Revised: 06/20/2024] [Accepted: 06/22/2024] [Indexed: 06/27/2024]
Abstract
Exploring strategies to improve the near-infrared response of photocatalysts is an urgent challenge that can be overcome by utilizing upconversion (UC) luminescence to enhance photocatalysis. This paper reports the fabrication of a ZnO/Bi3Ti2O8F:Yb3+, Er3+ (ZnO/BTOFYE) Z-scheme heterojunction based on a Bi3Ti2O8F:Yb3+, Er3+ (BTOFYE) UC photocatalyst via electrostatic self-assembly. Fermi energy difference at the interface of BTOFYE and ZnO generates a strong internal electric field (IEF) in the Z-scheme heterojunction, offering a novel charge transfer mode that promotes carrier transfer and separation while retaining the strong redox capability. These results are confirmed through in situ X-ray photoelectron spectroscopy, in situ Kelvin probe force microscopy, electron spin resonance, and density functional theory calculations. In addition, the effect of the IEF on the UC luminescence process of Er3+ enhances the luminescence intensity, considerably improving the UC utilization efficiency. The optimal ZnO/BTOFYE degrades 64 % of ciprofloxacin in 120 min, which is 2.3 times more than that degraded by BTOFYE. Overall, the results of this study offer a reference for the rational development of high efficiency UC photocatalysts by generating IEF in Z-scheme heterojunctions.
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Affiliation(s)
- Haomiao Cao
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 50093, China
| | - Zhaoyi Yin
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 50093, China
| | - Xiaoyi Dong
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 50093, China
| | - Yongjin Li
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 50093, China.
| | - Yong Yang
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 50093, China
| | - Jianbei Qiu
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 50093, China
| | - Zhengwen Yang
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 50093, China
| | - Zhiguo Song
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 50093, China.
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3
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Li F, Liao B, Shen J, Ke J, Zhang R, Wang Y, Niu Y. Enhancing Photocatalytic Activities for Sustainable Hydrogen Evolution on Structurally Matched CuInS 2/ZnIn 2S 4 Heterojunctions. Molecules 2024; 29:2447. [PMID: 38893323 PMCID: PMC11173830 DOI: 10.3390/molecules29112447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 05/14/2024] [Accepted: 05/17/2024] [Indexed: 06/21/2024] Open
Abstract
Effective charge separation and migration pose a critical challenge in the field of solar-driven hydrogen production. In this work, a Z-scheme structured CuInS2/ZnIn2S4 heterojunction was successfully fabricated through a two-step hydrothermal synthesis method to significantly enhance the efficiency of solar-to-hydrogen energy conversion. Structural characterization revealed that the lattice-matched CuInS2/ZnIn2S4 heterojunction exhibits an enlarged interfacial contact area, which facilitates the transfer and separation of photogenerated charges. Microscopic analysis indicated that the CuInS2/ZnIn2S4 composite material has a tightly interwoven interface and a morphology resembling small sugar cubes. Photoelectrochemical spectroscopy analysis demonstrated that the heterojunction structure effectively enhances visible light absorption and charge separation efficiency, leading to an improvement in photocatalytic activity. Hydrogen production experimental data indicated that the CuInS2/ZnIn2S4 heterojunction photocatalyst prepared with a CuInS2 content of 20 wt% exhibits the highest hydrogen evolution rate, reaching 284.9 μmol·g-1·h-1. Moreover, this photocatalyst maintains robust photocatalytic stability even after three consecutive usage cycles. This study demonstrated that the Z-scheme CuInS2/ZnIn2S4 heterojunction photocatalyst exhibits enhanced hydrogen evolution efficiency, offering an effective structural design for harnessing solar energy to obtain hydrogen fuel. Therefore, this heterojunction photocatalyst is a promising candidate for practical applications in solar hydrogen production.
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Affiliation(s)
- Fuying Li
- School of Resources & Chemical Engineering, Sanming University, Sanming 365004, China; (F.L.)
- Institute of Engineering and Technology Management, Krirk University, Bangkok 10220, Thailand
| | - Boiyee Liao
- Institute of Engineering and Technology Management, Krirk University, Bangkok 10220, Thailand
| | - Jinni Shen
- State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350007, China
| | - Junni Ke
- School of Resources & Chemical Engineering, Sanming University, Sanming 365004, China; (F.L.)
| | - Rongxin Zhang
- School of Resources & Chemical Engineering, Sanming University, Sanming 365004, China; (F.L.)
| | - Yueqi Wang
- Fujian Universities Engineering Research Center of Reactive Distillation Technology, Fuzhou University, Fuzhou 350007, China
| | - Yu Niu
- School of Resources & Chemical Engineering, Sanming University, Sanming 365004, China; (F.L.)
- Institute of Engineering and Technology Management, Krirk University, Bangkok 10220, Thailand
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4
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Yin HY, Li Q, Liu TH, Liu J, Qin YT, Wang Y, Zhai WL, Cai XB, Wang ZG, Zhu W. Multifunctional In-MOF and Its S-Scheme Heterojunction toward Pollutant Decontamination via Fluorescence Detection, Physical Adsorption, and Photocatalytic REDOX. Inorg Chem 2024; 63:1816-1827. [PMID: 38232749 DOI: 10.1021/acs.inorgchem.3c03268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2024]
Abstract
A novel doubly interpenetrated indium-organic framework of 1 has been assembled by In3+ ions and highly conjugated biquinoline carboxylate-based bitopic connectors (H2L). The isolated 1 exhibits an anionic framework possessing channel-type apertures repleted with exposed quinoline N atoms and carboxyl O atoms. Owing to the unique architecture, 1 displays a durable photoluminescence effect and fluorescence quenching sensing toward CrO42-, Cr2O72-, and Cu2+ ions with reliable selectivity and anti-interference properties, fairly high detection sensitivity, and rather low detection limits. Ligand-to-ligand charge transition (LLCT) was identified as the essential cause of luminescence by modeling the ground state and excited states of 1 using DFT and TD-DFT. In addition, the negatively charged framework has the ability to rapidly capture single cationic MB, BR14, or BY24 and their mixture, including the talent to trap MB from the (MB + MO) system with high selectivity. Moreover, intrinsic light absorption capacity and band structure feature endow 1 with effective photocatalytic decomposition ability toward reactive dyes RR2 and RB13 under ultraviolet light. Notably, after further polishing the band structure state of 1 by constructing the S-scheme heterojunction of In2S3/1, highly efficient photocatalytic detoxification of Cr(VI) and degradation of reactive dyes have been fully achieved under visible light. This finding may open a new avenue for designing novel multifunctional MOF-based platforms to address some intractable environmental issues, i.e., detection of heavy metal ions, physical capture of pony-sized dyes, and photochemical decontamination of ultrastubborn reactive dyes and highly toxic Cr(VI) ions from water.
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Affiliation(s)
- Huan-Yu Yin
- School of Environmental & Chemical Engineering, Xi'an Polytechnic University, Xi'an, Shaanxi 710048, P. R. China
| | - Qing Li
- School of Environmental & Chemical Engineering, Xi'an Polytechnic University, Xi'an, Shaanxi 710048, P. R. China
- Key Laboratory of Functional Textile Materials and Products, Ministry of Education, School of Textile Science & Engineering, Xi'an Polytechnic University, Xi'an, Shaanxi 710048, P. R. China
| | - Tian-Hui Liu
- School of Environmental & Chemical Engineering, Xi'an Polytechnic University, Xi'an, Shaanxi 710048, P. R. China
| | - Jie Liu
- School of Environmental & Chemical Engineering, Xi'an Polytechnic University, Xi'an, Shaanxi 710048, P. R. China
| | - Ying-Tong Qin
- School of Environmental & Chemical Engineering, Xi'an Polytechnic University, Xi'an, Shaanxi 710048, P. R. China
| | - Yang Wang
- School of Environmental & Chemical Engineering, Xi'an Polytechnic University, Xi'an, Shaanxi 710048, P. R. China
| | - Wei-Li Zhai
- Key Laboratory of Functional Textile Materials and Products, Ministry of Education, School of Textile Science & Engineering, Xi'an Polytechnic University, Xi'an, Shaanxi 710048, P. R. China
| | - Xin-Bin Cai
- School of Environmental & Chemical Engineering, Xi'an Polytechnic University, Xi'an, Shaanxi 710048, P. R. China
| | - Zhi-Gang Wang
- School of Environmental & Chemical Engineering, Xi'an Polytechnic University, Xi'an, Shaanxi 710048, P. R. China
| | - Wei Zhu
- School of Environmental & Chemical Engineering, Xi'an Polytechnic University, Xi'an, Shaanxi 710048, P. R. China
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5
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Zhu LB, Bao N, Zhang Q, Ding SN. Synergistically Enhanced Photocatalytic Degradation by Coupling Slow-Photon Effect with Z-Scheme Charge Transfer in CdS QDs/IO-TiO 2 Heterojunction. Molecules 2023; 28:5437. [PMID: 37513309 PMCID: PMC10385498 DOI: 10.3390/molecules28145437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 07/11/2023] [Accepted: 07/13/2023] [Indexed: 07/30/2023] Open
Abstract
Lower light absorption and faster carrier recombination are significant challenges in photocatalysis. This study introduces a novel approach to address these challenges by anchoring cadmium sulfide quantum dots (CdS QDs) on inverse opal (IO)-TiO2, which increases light absorption and promotes carriers' separation by coupling slow-photon effect with Z-scheme charge transfer. Specifically, the IO-TiO2 was created by etching a polystyrene opal template, which resulted in a periodic structure that enhances light absorption by reflecting light in the stop band. The size of CdS quantum dots (QDs) was regulated to achieve appropriate alignment of energy bands between CdS QDs and IO-TiO2, promoting carrier transfer through alterations in charge transfer modes and resulting in synergistic-amplified photocatalysis. Theoretical simulations and electrochemical investigations demonstrated the coexistence of slow-photon effects and Z-scheme transfer. The system's photodegradation performance was tested using rhodamine B as a model. This novel hierarchical structure of the Z-scheme heterojunction exhibits degradability 7.82 and 4.34 times greater than pristine CdS QDs and IO-TiO2, respectively. This study serves as a source of inspiration for enhancing the photocatalytic capabilities of IO-TiO2 and broadening its scope of potential applications.
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Affiliation(s)
- Li-Bang Zhu
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
| | - Ning Bao
- School of Public Health, Nantong University, Nantong 226019, China
| | - Qing Zhang
- Chinese Academy of Inspection and Quarantine, Beijing 100176, China
| | - Shou-Nian Ding
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
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6
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Katsina AU, Mihai S, Matei D, Cursaru DL, Şomoghi R, Nistor CL. Construction of Pt@BiFeO 3 Xerogel-Supported O-g-C 3N 4 Heterojunction System for Enhanced Visible-Light Activity towards Photocatalytic Degradation of Rhodamine B. Gels 2023; 9:471. [PMID: 37367142 DOI: 10.3390/gels9060471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 05/05/2023] [Accepted: 06/02/2023] [Indexed: 06/28/2023] Open
Abstract
Synthetic organic pigments from the direct discharge of textile effluents are considered as colossal global concern and attract the attention of scholars. The efficient construction of heterojunction systems involving precious metal co-catalysis is an effective strategy for obtaining highly efficient photocatalytic materials. Herein, we report the construction of a Pt-doped BiFeO3/O-g-C3N4 (Pt@BFO/O-CN) S-scheme heterojunction system for photocatalytic degradation of aqueous rhodamine B (RhB) under visible-light irradiation. The photocatalytic performances of Pt@BFO/O-CN and BFO/O-CN composites and pristine BiFeO3 and O-g-C3N4 were compared, and the photocatalytic process of the Pt@BFO/O-CN system was optimized. The results exhibit that the S-scheme Pt@BFO/O-CN heterojunction has superior photocatalytic performance compared to its fellow catalysts, which is due to the asymmetric nature of the as-constructed heterojunction. The as-constructed Pt@BFO/O-CN heterojunction reveals high performance in photocatalytic degradation of RhB with a degradation efficiency of 100% achieved after 50 min of visible-light irradiation. The photodegradation fitted well with pseudo-first-order kinetics proceeding with a rate constant of 4.63 × 10-2 min-1. The radical trapping test reveals that h+ and •O2- take the leading role in the reaction, while the stability test reveals a 98% efficiency after the fourth cycle. As established from various interpretations, the considerably enhanced photocatalytic performance of the heterojunction system can be attributed to the promoted charge carrier separation and transfer of photoexcited carriers, as well as the strong photo-redox ability established. Hence, the S-scheme Pt@BFO/O-CN heterojunction is a good candidate in the treatment of industrial wastewater for the mineralization of organic micropollutants, which pose a grievous threat to the environment.
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Affiliation(s)
- Abubakar Usman Katsina
- Faculty of Petroleum Technology and Petrochemistry, Petroleum-Gas University of Ploiești, 100680 Ploiești, Romania
- Department of Pure and Industrial Chemistry, Bayero University, Kano PMB 3011, Nigeria
| | - Sonia Mihai
- Faculty of Petroleum Technology and Petrochemistry, Petroleum-Gas University of Ploiești, 100680 Ploiești, Romania
| | - Dănuţa Matei
- Faculty of Petroleum Technology and Petrochemistry, Petroleum-Gas University of Ploiești, 100680 Ploiești, Romania
| | - Diana-Luciana Cursaru
- Faculty of Petroleum Technology and Petrochemistry, Petroleum-Gas University of Ploiești, 100680 Ploiești, Romania
| | - Raluca Şomoghi
- Faculty of Petroleum Technology and Petrochemistry, Petroleum-Gas University of Ploiești, 100680 Ploiești, Romania
- National Institute for Research and Development in Chemistry and Petrochemistry-ICECHIM, 060021 Bucharest, Romania
| | - Cristina Lavinia Nistor
- National Institute for Research and Development in Chemistry and Petrochemistry-ICECHIM, 060021 Bucharest, Romania
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Lu T, Zhao H, Jian L, Ji R, Pan C, Wang G, Dong Y, Zhu Y. Photocatalysis-self-Fenton system over edge covalently modified g-C 3N 4 with high mineralization of persistent organic pollutants. ENVIRONMENTAL RESEARCH 2023; 222:115361. [PMID: 36716807 DOI: 10.1016/j.envres.2023.115361] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 01/16/2023] [Accepted: 01/23/2023] [Indexed: 06/18/2023]
Abstract
The Fenton process is a widely used to remedy organic wastewaters, but it has problems of adding H2O2, low utilization efficiency of H2O2 and low mineralization efficiency. Here, a new photocatalysis-self-Fenton process was exploited for the removal of persistent 4-chlorophenol (4-CP) pollutant through coupling the photocatalysis of 4-carboxyphenylboronic acid edge covalently modified g-C3N4 (CPBA-CN) with Fenton. In this process, H2O2 was in situ generated via photocatalysis over CPBA-CN, the photogenerated electrons assisted the accelerated regeneration of Fe2+ to improve the utilization efficiency of H2O2, and the photogenerated holes facilitated the enhancement of 4-CP mineralization. Under the conjugation of CPBA, the electronic structure of CN was optimized and the molecular dipole was enhanced, resulting in the deepening valence band position, accelerated electron-hole pair separation, and improved O2 adsorption-activation. Therefore, the incremental 4-CP degradation rate in the CPBA-CN photocatalysis-self-Fenton process was approaching 0.099 min-1, by a factor of 3.1 times compared with photocatalysis. The parallel mineralization efficiency increased to 74.6% that was 2.1 and 2.6 times than photocatalysis and Fenton, respectively. In addition, this system maintained an excellent stability in the recycle experiment and can be potentially applied in a wide range of pHs and under the coexistence of various ions. This study would provide new insights for improving Fenton process and promote further development of Fenton in organic wastewater purification.
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Affiliation(s)
- Tongbin Lu
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China
| | - Hui Zhao
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China
| | - Liang Jian
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China
| | - Rong Ji
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China
| | - Chengsi Pan
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China
| | - Guangli Wang
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China.
| | - Yuming Dong
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China.
| | - Yongfa Zhu
- International Joint Research Center for Photo-responsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, China; Department of Chemistry, Tsinghua University, Beijing, 100084, China
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8
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Medina-Llamas M, Speltini A, Profumo A, Panzarea F, Milella A, Fracassi F, Listorti A, Malavasi L. Preparation of Heterojunctions Based on Cs 3Bi 2Br 9 Nanocrystals and g-C 3N 4 Nanosheets for Photocatalytic Hydrogen Evolution. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:263. [PMID: 36678018 PMCID: PMC9866070 DOI: 10.3390/nano13020263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 12/19/2022] [Accepted: 12/30/2022] [Indexed: 06/17/2023]
Abstract
Heterojunctions based on metal halide perovskites (MHPs) are promising systems for the photocatalytic hydrogen evolution reaction (HER). In this work, we coupled Cs3Bi2Br9 nanocrystals (NCs), obtained by wet ball milling synthesis, with g-C3N4 nanosheets (NSs), produced by thermal oxidation of bulk g-C3N4, in air. These methods are reproducible, inexpensive and easy to scale up. Heterojunctions with different loadings of Cs3Bi2Br9 NCs were fully characterised and tested for the HER. A relevant improvement of H2 production with respect to pristine carbon nitride was achieved at low NCs levels reaching values up to about 4600 µmol g-1 h-1. This work aims to provide insights into the synthesis of inexpensive and high-performing heterojunctions using MHP for photocatalytic applications.
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Affiliation(s)
- María Medina-Llamas
- Unidad Académica Preparatoria, Plantel II, Universidad Autónoma de Zacatecas, Zacatecas 98068, Mexico
- Department of Chemistry, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy
| | - Andrea Speltini
- Department of Chemistry, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy
| | - Antonella Profumo
- Department of Chemistry, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy
| | - Francesca Panzarea
- Department of Chemistry, University of Bari “Aldo Moro” via Orabona 4, 70126 Bari, Italy
| | - Antonella Milella
- Department of Chemistry, University of Bari “Aldo Moro” via Orabona 4, 70126 Bari, Italy
| | - Francesco Fracassi
- Department of Chemistry, University of Bari “Aldo Moro” via Orabona 4, 70126 Bari, Italy
- National Research Council, Department of Chemistry, Institute of Nanotechnology (CNR-NANOTEC), 70125 Bari, Italy
| | - Andrea Listorti
- Department of Chemistry, University of Bari “Aldo Moro” via Orabona 4, 70126 Bari, Italy
| | - Lorenzo Malavasi
- Department of Chemistry, University of Pavia, Via Taramelli 12, 27100 Pavia, Italy
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9
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Song M, Shao H, Chen Y, Deng X, Chen Y, Yao Y, Lu S, Liao X. Visible light-driven H 2O 2 synthesis over Au/C 3N 4: medium-sized Au nanoparticles exhibiting suitable built-in electric fields and inhibiting reverse H 2O 2 decomposition. Phys Chem Chem Phys 2022; 24:29557-29569. [PMID: 36448564 DOI: 10.1039/d2cp04202a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Visible light-driven H2O2 production presents the unique merits of sustainability and environmental friendliness. The size of noble metal nanoparticles (NPs) determines their dispersion and electronic structure and greatly affects their photocatalytic activity. In this work, a series of sized Au NPs over C3N4 were modulated for H2O2 production. The results show that there is a volcanic trend in H2O2 with the decrease of Au particle size, and the highest H2O2 production rate of 1052 μmol g-1 h-1 is obtained from medium-sized Au particles (∼8.7 nm). The relationship between structure and catalytic performance is supported by experimental and theoretical methods. (1) First, medium-sized Au NPs promote photon absorption, and have a suitable built-in electric field at the heterojunction, which can be successfully tuned to achieve a more efficient h+-e- spatial separation. (2) Second, medium-sized Au NPs enhance O2 adsorption, and create selective 2e- O2 reduction reaction sites. (3) Particularly, medium-sized Au NPs promote the desorption of produced H2O2 and inhibit H2O2 decomposition, finally leading to the highest H2O2 selectivity. Excellent catalytic performance will be obtained by finely optimizing the particle size in a certain range. This work provides a new idea for preparing high efficiently photocatalysts for H2O2 production.
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Affiliation(s)
- Mengzhen Song
- College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin, China.
| | - Huijuan Shao
- College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin, China.
| | - Yi Chen
- College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin, China.
| | - Xiangyang Deng
- College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin, China.
| | - Yanyan Chen
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, P. O. Box 165, Taiyuan, Shanxi, China
| | - Yue Yao
- College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin, China.
| | - Shuxiang Lu
- College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin, China.
| | - Xiaoyuan Liao
- College of Chemical Engineering and Materials Science, Tianjin University of Science and Technology, Tianjin, China.
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10
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TiO2-Based Heterostructure Containing g-C3N4 for an Effective Photocatalytic Treatment of a Textile Dye. Catalysts 2022. [DOI: 10.3390/catal12121554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
Water pollution has become a serious environmental issue. The textile industries using textile dyes are considered to be one of the most polluting of all industrial sectors. The application of solar-light semiconductor catalysts in wastewater treatment, among which TiO2 can be considered a prospective candidate, is limited by rapid recombination of photogenerated charge carriers. To address these limitations, TiO2 was tailored with graphitic carbon nitride (g-C3N4) to develop a heterostructure of g-C3N4@TiO2. Herein, a simple hydrothermal synthesis of TiO2@g-C3N4 is presented, using titanium isopropoxide (TTIP) and urea as precursors. The morphological and optical properties and the structure of g-C3N4, TiO2, and the prepared heterostructure TiO2@g-C3N4 (with different wt.% up to 32%), were analyzed by various laboratory methods. The photocatalytic activity was studied through the degradation of methylene blue (MB) aqueous solution under UV-A and simulated solar irradiation. The results showed that the amount of g-C3N4 and the irradiation source are the most important influences on the efficiency of MB removal by g-C3N4@TiO2. Photocatalytic degradation of MB was also examined in realistic conditions, such as natural sunlight and different aqueous environments. The synthesized g-C3N4@TiO2 nanocomposite showed superior photocatalytic properties in comparison with pure TiO2 and g-C3N4, and is thus a promising new photocatalyst for real-life implementation. The degradation mechanism was investigated using scavengers for electrons, photogenerated holes, and hydroxyl radicals to find the responsible species for MB degradation.
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Cai X, Wang Y, Tang S, Mo L, Leng Z, Zang Y, Jing F, Zang S. Rhombohedral/Cubic In 2O 3 Phase Junction Hybridized with Polymeric Carbon Nitride for Photodegradation of Organic Pollutants. Int J Mol Sci 2022; 23:ijms232214293. [PMID: 36430772 PMCID: PMC9695553 DOI: 10.3390/ijms232214293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 11/15/2022] [Accepted: 11/16/2022] [Indexed: 11/19/2022] Open
Abstract
In recent studies, phase junctions constructed as photocatalysts have been found to possess great prospects for organic degradation with visible light. In this study, we designed an elaborate rhombohedral corundum/cubic In2O3 phase junction (named MIO) combined with polymeric carbon nitride (PCN) via an in situ calcination method. The performance of the MIO/PCN composites was measured by photodegradation of Rhodamine B under LED light (λ = 420 nm) irradiation. The excellent performance of MIO/PCN could be attributed to the intimate interface contact between MIO and PCN, which provides a reliable charge transmission channel, thereby improving the separation efficiency of charge carriers. Photocatalytic degradation experiments with different quenchers were also executed. The results suggest that the superoxide anion radicals (O2-) and hydroxyl radicals (·OH) played the main roles in the reaction, as opposed to the other scavengers. Moreover, the stability of the MIO/PCN composites was particularly good in the four cycling photocatalytic reactions. This work illustrates that MOF-modified materials have great potential for solving environmental pollution without creating secondary pollution.
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Affiliation(s)
- Xiaorong Cai
- Institute of Innovation & Application, National Engineering Research Center For Marine Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China
| | - Yaning Wang
- Institute of Innovation & Application, National Engineering Research Center For Marine Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China
| | - Shuting Tang
- Institute of Innovation & Application, National Engineering Research Center For Marine Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China
| | - Liuye Mo
- Institute of Innovation & Application, National Engineering Research Center For Marine Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China
| | - Zhe Leng
- Institute of Innovation & Application, National Engineering Research Center For Marine Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China
- Correspondence: (Z.L.); (S.Z.)
| | - Yixian Zang
- Institute of Innovation & Application, National Engineering Research Center For Marine Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China
| | - Fei Jing
- Institute of Innovation & Application, National Engineering Research Center For Marine Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China
| | - Shaohong Zang
- Institute of Innovation & Application, National Engineering Research Center For Marine Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China
- Donghai Laboratory, Zhoushan 316021, China
- Correspondence: (Z.L.); (S.Z.)
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Yao X, Zhen H, Zhang D, Liu J, Pu X, Cai P. Microwave-assisted hydrothermal synthesis of broadband Yb3+/Er3+ co-doped BiOI/Bi2O4 photocatalysts with synergistic effects of upconversion and direct Z-scheme heterojunction. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129276] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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13
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Wu L, Hua X, Li Y, Zhang Y, Xue X, Deng H, Luo Z, Zhang Y. Aggregation-based phase transition tailored heterophase junctions of AgInS 2 for boosting photocatalytic H 2 evolution. J Colloid Interface Sci 2022; 628:721-730. [PMID: 36027782 DOI: 10.1016/j.jcis.2022.08.114] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Revised: 08/12/2022] [Accepted: 08/16/2022] [Indexed: 11/16/2022]
Abstract
Due to high defect tolerance and multiphase allowance, AgInS2 (AIS) quantum dots (QDs) provide chances for designing new type junctions via tailoring defects, size, or phase structure. These new type junctions potentially enhance photoelectric performance, such as photocatalytic H2 evolution (PHE). Here, ultra-small AIS QDs (∼1 nm) with well-defined exciton absorption were prepared aqueously via a reverse hot-injection procedure for the first time. A coalescence or fast aggregation-based growth was observed for coarsening at 95 or 135 ℃, respectively. XRD and TEM investigations revealed that the tetragonal-orthorhombic (t-o) phase transition occurred via aggregation-based growth. The studies on phase transition kinetics resulted in fine-tailoring on AIS polymorphs, favoring t-o AIS junctions. UV-vis absorption spectra confirm the double absorption edge of the t-o heterophase junction with enhanced visible absorption. Steady and transient PL spectra suggest improvements in carriers' separation/transfer in this t-o junction. As a result, the optimized t-o AIS shows superior photocatalytic H2 evolution rates of 1022 μmol. g-1. h-1, 51.1 times that of t-AIS or 3.8 times that of o-AIS. This work is expected to provide new insight for designing ternary alloyed QDs with strongly coupled interfaces for effective H2 generations.
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Affiliation(s)
- Longyan Wu
- School of Materials Science and Engineering, Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, People's Republic of China
| | - Xianhao Hua
- School of Materials Science and Engineering, Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, People's Republic of China
| | - Yu Li
- School of Materials Science and Engineering, Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, People's Republic of China
| | - Yuxin Zhang
- School of Materials Science and Engineering, Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, People's Republic of China
| | - Xiaogang Xue
- School of Materials Science and Engineering, Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, People's Republic of China; School of Optoelectronic Engineering, Guangxi Key Laboratory of Optoelectronic Information Processing, Guilin University of Electronic Technology, Guilin 541004, People's Republic of China; State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, People's Republic of China.
| | - Honggao Deng
- School of Optoelectronic Engineering, Guangxi Key Laboratory of Optoelectronic Information Processing, Guilin University of Electronic Technology, Guilin 541004, People's Republic of China
| | - Zhenggang Luo
- School of Materials Science and Engineering, Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, People's Republic of China
| | - Yuting Zhang
- School of Optoelectronic Engineering, Guangxi Key Laboratory of Optoelectronic Information Processing, Guilin University of Electronic Technology, Guilin 541004, People's Republic of China.
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Ahmed AI, Kospa DA, Gamal S, Samra SE, Salah AA, El-Hakam SA, Awad Ibrahim A. Fast and simple fabrication of reduced graphene oxide-zinc tungstate nanocomposite with enhanced photoresponse properties as a highly efficient indirect sunlight driven photocatalyst and antibacterial agent. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.113907] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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15
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Chowdhury AP, Anantharaju KS, Umare SS, Dhar SS. Facile fabrication of binary BiOCl-Cu2CoSnS4 and ternary BiOCl-Cu2CoSnS4-TiO2 heterojunction nano photocatalyst for efficient sunlight-driven removal of direct blue 71 in an aqueous medium. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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16
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Jung H, Sapner VS, Adhikari A, Sathe BR, Patel R. Recent Progress on Carbon Quantum Dots Based Photocatalysis. Front Chem 2022; 10:881495. [PMID: 35548671 PMCID: PMC9081694 DOI: 10.3389/fchem.2022.881495] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 03/07/2022] [Indexed: 12/03/2022] Open
Abstract
As a novel carbon allotrope, carbon quantum dots (CQDs) have been investigated in various fields, including photocatalysis, bioimaging, optoelectronics, energy and photovoltaic devices, biosensing, and drug delivery owing to their unique optical and electronic properties. In particular, CQDs' excellent sunlight harvesting ability, tunable photoluminescence (PL), up-conversion photoluminescence (UCPL), and efficient photo-excited electron transfer have enabled their applications in photocatalysis. This work focuses on the recent progress on CQDs-related materials' synthesis, properties, and applications in photocatalysis.
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Affiliation(s)
- Hwapyung Jung
- Nano Science and Engineering, Integrated Science and Engineering Division (ISED), Underwood International College, Yonsei University, Incheon, South Korea
| | - Vijay S. Sapner
- Department of Chemistry, Dr. Babasaheb Ambedkar Marathwada University Aurangabad, Seoul, South Korea
| | | | - Bhaskar R. Sathe
- Department of Chemistry, Dr. Babasaheb Ambedkar Marathwada University Aurangabad, Seoul, South Korea,*Correspondence: Bhaskar R. Sathe, ; Rajkumar Patel,
| | - Rajkumar Patel
- Energy and Environmental Science and Engineering (EESE), Integrated Science and Engineering Division (ISED), Underwood International College, Yonsei University, Incheon, South Korea,*Correspondence: Bhaskar R. Sathe, ; Rajkumar Patel,
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Nanointerface engineering Z-scheme CuBiOS@CuBi 2O 4 heterojunction with OS interpenetration for enhancing photocatalytic hydrogen peroxide generation and accelerating chromium(VI) reduction. J Colloid Interface Sci 2021; 611:760-770. [PMID: 34848055 DOI: 10.1016/j.jcis.2021.11.100] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 11/09/2021] [Accepted: 11/18/2021] [Indexed: 12/21/2022]
Abstract
Designing a core-shell nanointerface is beneficial for enhancing the photocatalytic performance of hydrogen peroxide (H2O2) production. Hence, a direct Z-scheme one-dimensional (1 D) CuBiOS@CuBi2O4 nanorods with a core (oxide)-shell (sulfide) nanostructure and OS interpenetrated nanointerface was controllably synthesized through in-situ anion exchange. The formation of OS interpenetration at the heterogeneous interface with surface oxygen vacancies could effectively boost light absorption, reduce the interface contact resistance, facilitate band bending, and thus enhance charge separation and transfer as a "bridge". The as-prepared catalyst with tunable OS nanointerface greatly improved the photocatalytic performances in the H2O2 production with a yield of 201.9 μmol·L-1 and the in-situ generated H2O2 effectively accelerated the reduction of chromium(VI) (Cr(VI), 95.4% within 15 min). The excellent performances were due to the OS interpenetration with rich oxygen vacancies and unique shell-core structure with intimate contact inter-doping nanointerface. Moreover, the photocatalytic mechanism was discussed in detail. This work might provide a guideline in the design and construction of high-performance catalysts with well-defined nanointerface for various applications.
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