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Chen X, Huang Y, Deng Z, Zhao H, Ma F, Zhang J, Wei X. The strain regulated physical properties of PbI 2/g-C 3N 4for potential optoelectronic device. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2024; 36:255704. [PMID: 38484393 DOI: 10.1088/1361-648x/ad33ef] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 03/14/2024] [Indexed: 03/28/2024]
Abstract
The van der Waals (vdW) heterostructures of Z-scheme PbI2/g-C3N4with an indirect bandgap have gained much attention in recent years due to their unique properties and potential applications in various fields. However, the optoelectronic characteristics and strain-modulated effects are not yet fully understood. By considering this, six stacking models of PbI2/g-C3N4are proposed and the stablest structure is selected for further investigation. The uniaxial and biaxial strains (-10%-10%) regulated band arrangement, charge distribution, optical absorption in the framework of density functional theory are systematically explored. The compressive uniaxial strain of -8.55% changes the band type from II→I, and the biaxial strains of -7.12%, -5.25%, 8.91% change the band type in a way of II→I→II→I, acting like the 'band-pass filter'. The uniaxial strains except -10% compressive strain, and the -6%, -4%, 2%, 4%, 10% biaxial strains will enhance the light absorption of PbI2/g-C3N4. The exerted strains on PbI2/g-C3N4generate different power conversion efficiency (ηPCE) values ranging from 3.64% to 25.61%, and the maximumηPCEis generated by -6% biaxial strain. The results of this study will pave the way for the development of new electronic and optoelectronic materials with customized properties in photocatalytic field and optoelectronic devices.
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Affiliation(s)
- Xiunan Chen
- School of Physics & Information Technology, Shaanxi Normal University, Xi'an 710119, Shaanxi, People's Republic of China
| | - Yuhong Huang
- School of Physics & Information Technology, Shaanxi Normal University, Xi'an 710119, Shaanxi, People's Republic of China
| | - Zunyi Deng
- School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, Beijing, People's Republic of China
| | - Haili Zhao
- School of Physics and Engineering, Henan University of Science and Technology, Luoyang 471023, Henan, People's Republic of China
| | - Fei Ma
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, People's Republic of China
| | - Jianmin Zhang
- School of Physics & Information Technology, Shaanxi Normal University, Xi'an 710119, Shaanxi, People's Republic of China
| | - Xiumei Wei
- School of Physics & Information Technology, Shaanxi Normal University, Xi'an 710119, Shaanxi, People's Republic of China
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2
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Yuan X, Hu X, Lin Q, Zhang S. Progress of charge carrier dynamics and regulation strategies in 2D C xN y-based heterojunctions. Chem Commun (Camb) 2024; 60:2283-2300. [PMID: 38321964 DOI: 10.1039/d3cc05976f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
Two-dimensional carbon nitrides (CxNy) have gained significant attention in various fields including hydrogen energy development, environmental remediation, optoelectronic devices, and energy storage owing to their extensive surface area, abundant raw materials, high chemical stability, and distinctive physical and chemical characteristics. One effective approach to address the challenges of limited visible light utilization and elevated carrier recombination rates is to establish heterojunctions for CxNy-based single materials (e.g. C2N3, g-C3N4, C3N4, C4N3, C2N, and C3N). The carrier generation, migration, and recombination of heterojunctions with different band alignments have been analyzed starting from the application of CxNy with metal oxides, transition metal sulfides (selenides), conductive carbon, and Cx'Ny' heterojunctions. Additionally, we have explored diverse strategies to enhance heterojunction performance from the perspective of carrier dynamics. In conclusion, we present some overarching observations and insights into the challenges and opportunities associated with the development of advanced CxNy-based heterojunctions.
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Affiliation(s)
- Xiaojia Yuan
- MIIT Key Laboratory of Advanced Display Materials and Devices, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China.
| | - Xuemin Hu
- MIIT Key Laboratory of Advanced Display Materials and Devices, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China.
- School of Material Engineering, Jinling Institute of Technology, Nanjing 211169, China
| | - Qiuhan Lin
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China.
| | - Shengli Zhang
- MIIT Key Laboratory of Advanced Display Materials and Devices, School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China.
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Wang L, Chen Y, Zhang C, Zhong Z, Amirav L. Porous In 2O 3 Hollow Tube Infused with g-C 3N 4 for CO 2 Photocatalytic Reduction. ACS APPLIED MATERIALS & INTERFACES 2024; 16:4581-4591. [PMID: 38232351 DOI: 10.1021/acsami.3c14826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2024]
Abstract
Converting CO2 into energy-rich fuels by using solar energy is a sustainable solution that promotes a carbon-neutral economy and mitigates our reliance on fossil fuels. However, affordable and efficient CO2 conversion remains an ongoing challenge. Here, we introduce polymeric g-C3N4 into the pores of a hollow In2O3 microtube. This architecture results in a compact and staggered arrangement between g-C3N4 and In2O3 components with an increased contact interface for improved charge separation. The hollow interior further contributes to strengthening light absorption. The resulting g-C3N4-In2O3 hollow tubes exhibit superior activity (274 μmol·g-1·h-1) toward CO2 to CO conversion in comparison with those of pure In2O3 and g-C3N4 (5.5 and 93.6 μmol·g-1·h-1, respectively), underlining the role of integrating g-C3N4 and In2O3 in this advanced system. This work offers a strategy for the advanced design and preparation of hollow heterostructures for optimizing CO2 adsorption and conversion by integrating inorganic and organic semiconductors.
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Affiliation(s)
- Letian Wang
- Department of Chemical Engineering, Guangdong Technion-Israel Institute of Technology (GTIIT), Guangdong 515063, China
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel
- Guangdong Provincial Key Laboratory of Materials and Technologies for Energy Conversion (MATEC), Guangdong Technion-Israel Institute of Technology, Guangdong 515063, China
| | - Yuexing Chen
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | - Chenchen Zhang
- Department of Chemical Engineering, Guangdong Technion-Israel Institute of Technology (GTIIT), Guangdong 515063, China
- Guangdong Provincial Key Laboratory of Materials and Technologies for Energy Conversion (MATEC), Guangdong Technion-Israel Institute of Technology, Guangdong 515063, China
| | - Ziyi Zhong
- Department of Chemical Engineering, Guangdong Technion-Israel Institute of Technology (GTIIT), Guangdong 515063, China
- Guangdong Provincial Key Laboratory of Materials and Technologies for Energy Conversion (MATEC), Guangdong Technion-Israel Institute of Technology, Guangdong 515063, China
| | - Lilac Amirav
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel
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4
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Villora-Picó JJ, González-Arias J, Baena-Moreno FM, Reina TR. Renewable Carbonaceous Materials from Biomass in Catalytic Processes: A Review. MATERIALS (BASEL, SWITZERLAND) 2024; 17:565. [PMID: 38591382 PMCID: PMC10856170 DOI: 10.3390/ma17030565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Revised: 01/16/2024] [Accepted: 01/23/2024] [Indexed: 04/10/2024]
Abstract
This review paper delves into the diverse ways in which carbonaceous resources, sourced from renewable and sustainable origins, can be used in catalytic processes. Renewable carbonaceous materials that come from biomass-derived and waste feedstocks are key to developing more sustainable processes by replacing traditional carbon-based materials. By examining the potential of these renewable carbonaceous materials, this review aims to shed light on their significance in fostering environmentally conscious and sustainable practices within the realm of catalysis. The more important applications identified are biofuel production, tar removal, chemical production, photocatalytic systems, microbial fuel cell electrodes, and oxidation applications. Regarding biofuel production, biochar-supported catalysts have proved to be able to achieve biodiesel production with yields exceeding 70%. Furthermore, hydrochars and activated carbons derived from diverse biomass sources have demonstrated significant tar removal efficiency. For instance, rice husk char exhibited an increased BET surface area from 2.2 m2/g to 141 m2/g after pyrolysis at 600 °C, showcasing its effectiveness in adsorbing phenol and light aromatic hydrocarbons. Concerning chemical production and the oxidation of alcohols, the influence of biochar quantity and pre-calcination temperature on catalytic performance has been proven, achieving selectivity toward benzaldehyde exceeding 70%.
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Affiliation(s)
- Juan J. Villora-Picó
- Inorganic Chemistry Department and Materials Sciences Institute, University of Seville-CSIC, 41092 Seville, Spain; (J.J.V.-P.); (T.R.R.)
| | - Judith González-Arias
- Inorganic Chemistry Department and Materials Sciences Institute, University of Seville-CSIC, 41092 Seville, Spain; (J.J.V.-P.); (T.R.R.)
| | - Francisco M. Baena-Moreno
- Chemical and Environmental Engineering Department, Technical School of Engineering, University of Seville, C/Camino de los Descubrimientos s/n, 41092 Sevilla, Spain
| | - Tomás R. Reina
- Inorganic Chemistry Department and Materials Sciences Institute, University of Seville-CSIC, 41092 Seville, Spain; (J.J.V.-P.); (T.R.R.)
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Kumar KV, Andronic L, Baba EM, Deribew D, Mayandi J, Moons E, Karazhanov SZ. Experimental and Theoretical Investigation of Gadolinium Oxyhydride (GdHO) Thin Films: Optical, Photocatalytic, and Electronic Properties. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:3093. [PMID: 38132990 PMCID: PMC10745946 DOI: 10.3390/nano13243093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 12/05/2023] [Accepted: 12/05/2023] [Indexed: 12/23/2023]
Abstract
Oxyhydrides of rare-earth metals (REMOHs) exhibit notable photochromic behaviors. Among these, yttrium oxyhydride (YHO) stands out for its impressive transparency and swift UV-responsive color change, positioning it as an optimal material for self-cleaning window applications. Although semiconductor photocatalysis holds potential solutions for critical environmental issues, optimizing the photocatalytic efficacy of photochromic substances has not been adequately addressed. This research advances the study of REMOHs, focusing on the properties of gadolinium oxyhydride (GdHO) both theoretically and experimentally. The electronic and structural characteristics of GdHO, vital for ceramic technology, are thoroughly examined. Explicitly determined work functions for GdH2, GdHO, and Gd2O3 stand at 3.4 eV, 3.0 eV, and 4.3 eV, respectively. Bader charge analysis showcases GdHO's intricate bonding attributes, whereas its electron localization function majorly presents an ionic nature. The charge neutrality level is situated about 0.33 eV below the top valence band, highlighting these materials' inclination for acceptor-dominant electrical conductivity. Remarkably, this research unveils GdHO films' photocatalytic capabilities for the first time. Even with their restricted surface due to thinness, these films follow the Langmuir-Hinshelwood degradation kinetics, ensuring total degradation of methylene blue in a day. It was observed that GdHO's work function diminishes with reduced deposition pressure, and UV exposure further decreases it by 0.2 eV-a change that reverts post-UV exposure. The persistent stability of GdHO films, hinting at feasible recyclability, enhances their potential efficiency, underlining their viability in practical applications. Overall, this study accentuates GdHO's pivotal role in electronics and photocatalysis, representing a landmark advancement in the domain.
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Affiliation(s)
- Kasi Vinoth Kumar
- Department for Solar Energy, Institute for Energy Technology, 2027 Kjeller, Norway; (K.V.K.); (E.M.B.); (S.Z.K.)
- School of Physics, Madurai Kamaraj University, Madurai 625021, Tamil Nadu, India
| | - Luminita Andronic
- Department of Product Design, Mechatronics and Environment, Transilvania University of Brasov, 500036 Brasov, Romania
| | - Elbruz Murat Baba
- Department for Solar Energy, Institute for Energy Technology, 2027 Kjeller, Norway; (K.V.K.); (E.M.B.); (S.Z.K.)
| | - Dargie Deribew
- Department of Engineering and Physics, Karlstad University, SE-65188 Karlstad, Sweden; (D.D.); (E.M.)
| | - Jeyanthinath Mayandi
- School of Chemistry, Madurai Kamaraj University, Madurai 625021, Tamil Nadu, India;
| | - Ellen Moons
- Department of Engineering and Physics, Karlstad University, SE-65188 Karlstad, Sweden; (D.D.); (E.M.)
| | - Smagul Zh. Karazhanov
- Department for Solar Energy, Institute for Energy Technology, 2027 Kjeller, Norway; (K.V.K.); (E.M.B.); (S.Z.K.)
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6
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Zhao WJ, Ma L, Zhang JM. Investigation on the photocatalytic property of direct Z-type van der Waals g-C3N4/AlN heterojunction and its mechanism. Chem Phys 2023. [DOI: 10.1016/j.chemphys.2023.111913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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7
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Shahini E, Shankar K, Tang T. Liquid-phase exfoliation of graphitic carbon nitrides studied by molecular dynamics simulation. J Colloid Interface Sci 2023; 630:900-910. [DOI: 10.1016/j.jcis.2022.10.150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Revised: 10/11/2022] [Accepted: 10/29/2022] [Indexed: 11/09/2022]
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8
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Wang S, Li Q, Ge K, Yang Y, Zhang Y, Pan M, Zhu L. Ferroelectric nano-heterojunctions for piezoelectricity-enhanced photocatalysis. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2022.122433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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9
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Gao RH, Ge Q, Jiang N, Cong H, Liu M, Zhang YQ. Graphitic carbon nitride (g-C 3N 4)-based photocatalytic materials for hydrogen evolution. Front Chem 2022; 10:1048504. [PMID: 36386003 PMCID: PMC9640947 DOI: 10.3389/fchem.2022.1048504] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 10/14/2022] [Indexed: 07/30/2023] Open
Abstract
The semiconductors, such as TiO2, CdS, ZnO, BiVO4, graphene, produce good applications in photocatalytic water splitting for hydrogen production, and great progress have been made in the synthesis and modification of the materials. As a two-dimensional layered structure material, graphitic carbon nitride (g-C3N4), with the unique properties of high thermostability and chemical inertness, excellent semiconductive ability, affords good potential in photocatalytic hydrogen evolution. However, the related low efficiency of g-C3N4 with fast recombination rate of photogenerated charge carriers, limited visible-light absorption, and low surface area of prepared bulk g-C3N4, has called out the challenge issues to synthesize and modify novel g-C3N4-block photocatalyst. In this review, we have summarized several strategies to improve the photocatalytic performance of pristine g-C3N4 such as pH, morphology control, doping with metal or non-metal elements, metal deposition, constructing a heterojunction or homojunction, dye-sensitization, and so forth. The performances for photocatalytic hydrogen evolution and possible development of g-C3N4 materials are shared with the researchers interested in the relevant fields hereinto.
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Affiliation(s)
- Rui-Han Gao
- Enterprise Technology Center of Guizhou Province, Guizhou University, Guiyang, China
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang, China
| | - Qingmei Ge
- Enterprise Technology Center of Guizhou Province, Guizhou University, Guiyang, China
| | - Nan Jiang
- Enterprise Technology Center of Guizhou Province, Guizhou University, Guiyang, China
| | - Hang Cong
- Enterprise Technology Center of Guizhou Province, Guizhou University, Guiyang, China
| | - Mao Liu
- Enterprise Technology Center of Guizhou Province, Guizhou University, Guiyang, China
| | - Yun-Qian Zhang
- Enterprise Technology Center of Guizhou Province, Guizhou University, Guiyang, China
- Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province, Guizhou University, Guiyang, China
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10
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Kumar Singh A, Das C, Indra A. Scope and prospect of transition metal-based cocatalysts for visible light-driven photocatalytic hydrogen evolution with graphitic carbon nitride. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214516] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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11
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Ranjbakhsh E, Izadyar M, Nakhaeipour A, Habibi-Yangjeh A. Quantum chemistry calculations of S, P, and O-doping effect on the photocatalytic molecular descriptors of g-C3N4 quantum dots. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2022. [DOI: 10.1007/s13738-022-02545-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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12
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Hu C, Sun H, Jia X, Lin H, Cao J, Chen S. Synergy of Piezoelectric Polarization and Empty Conduction Band of Zinc Sulfide: Realizing Structure Modulation on Graphitic Carbon Nitride for Carbon Dioxide Reduction to Methane. CHEMPHOTOCHEM 2022. [DOI: 10.1002/cptc.202200150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Cheng Hu
- Huaibei Normal University Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education; College of Chemistry and Materials Science Dongshan road 100. 235000 Huaibei CHINA
| | - Haoyu Sun
- Huaibei Normal University Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education; College of Chemistry and Materials Science Dongshan road 100. 235000 Huaibei CHINA
| | - Xuemei Jia
- Huaibei Normal University College of chemistry and materials science Dongshan road 100. 235000 Huaibei CHINA
| | - Haili Lin
- Huaibei Normal University Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education; College of Chemistry and Materials Science Dongshan road 100. 235000 Huaibei CHINA
| | - Jing Cao
- Huaibei Normal University Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education; College of Chemistry and Materials Science Dongshan road 100. 235000 Huaibei CHINA
| | - Shifu Chen
- Huaibei Normal University Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education; College of Chemistry and Materials Science Dongshan road 100. 235000 Huaibei CHINA
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13
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Enhanced Photocatalytic and Photoluminescence Properties Resulting from Type-I Band Alignment in the Zn2GeO4/g-C3N4 Nanocomposites. Catalysts 2022. [DOI: 10.3390/catal12070692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Well-defined Zn2GeO4/g-C3N4 nanocomposites with a band alignment of type-I were prepared by the ultrasound-assisted solvent method, starting from g-C3N4 nanosheets and incorporating 0, 10, 20, and 40 wt% of Zn2GeO4. In this study, we have investigated in-depth the photoluminescence emission and photocatalytic activity of these nanocomposites. Our experimental results showed that an increased mass ratio of Zn2GeO4 to g-C3N4 can significantly improve their photoluminescence and photocatalytic responses. Additionally, we have noted that the broadband photoluminescence (PL) emission for these nanocomposites reveals three electronic transitions; the first two well-defined transitions (at ca. 450 nm and 488 nm) can be attributed to π*→ lone pair (LP) and π*→π transitions of g-C3N4, while the single shoulder at ca. 532 nm is due to the oxygen vacancy (Vo) as well as the hybridization of 4s and 4p orbital states in the Zn and Ge belonging to Zn2GeO4. These experimental findings are also supported by theoretical calculations performed under periodic conditions based on the density functional theory (DFT) fragment. The theoretical findings for these nanocomposites suggest a possible strain-induced increase in the Zn-O bond length, as well as a shortening of the Ge-O bond of both tetrahedral [ZnO4] and [GeO4] clusters, respectively. Thus, this disordered structure promotes local polarization and a charge gradient in the Zn2GeO4/g-C3N4 interface that enable an efficient separation and transfer of the photoexcited charges. Finally, theoretical results show a good correlation with our experimental data.
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14
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Chen X, Wu Y, Deng M, Shen H, Ding J, Wang W. Effects of Fluorination and Molybdenum Codoping on Monoclinic BiVO 4 Photocatalyst by HSE Calculations. ACS OMEGA 2022; 7:17075-17082. [PMID: 35647421 PMCID: PMC9134236 DOI: 10.1021/acsomega.2c00382] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 05/04/2022] [Indexed: 06/15/2023]
Abstract
Monoclinic phase bismuth vanadate (BiVO4) is one of the most promising photoelectrochemical materials used in water-splitting photoelectrochemical cells. It could be even better if its band gap and charge transport characteristics were optimized. Although codoping of BiVO4 has proven to be an effective strategy, its effects are remarkably poorly understood. Using the Heyd-Scuseria-Ernzerhof (HSE) hybrid functional, we estimate the formation energy, electronic properties, and photocatalytic activities of F and Mo codoped BiVO4. We find that Mo atoms prefer to replace V atoms, whereas F atoms prefer to replace O atoms (FOMoV-doped BiVO4) under oxygen-poor conditions according to calculated formation energies. BiVO4 doped with FOMoV is found to be shallow-level doped, occurring with some continuum states above the conduction band edge, which is advantageous for photochemical catalysis. Moreover, FOMoV-doped BiVO4 shows absorption stronger than that of pure BiVO4 in the visible spectrum. Based on the band-edge calculation, BiVO4 doped with FOMoV still retains a high oxidizing capacity. It has been shown that FOMoV-doped BiVO4 exhibits a very high photocatalytic activity under visible light.
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Affiliation(s)
- Xia Chen
- School
of Physics and Optoelectronic Engineering, Xiangtan University, Xiangtan 411100, China
| | - Yonggang Wu
- School
of Physics and Electronic Science, Guizhou
Education University, Guiyang 550018, China
| | - MingSen Deng
- Guizhou
Provincial Key Laboratory of Computational Nano-Material Science, Guizhou Education University, Guiyang 550018, China
| | - Hujun Shen
- Guizhou
Provincial Key Laboratory of Computational Nano-Material Science, Guizhou Education University, Guiyang 550018, China
| | - Jianwen Ding
- School
of Physics and Optoelectronic Engineering, Xiangtan University, Xiangtan 411100, China
| | - Wentao Wang
- Guizhou
Provincial Key Laboratory of Computational Nano-Material Science, Guizhou Education University, Guiyang 550018, China
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15
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Shaik F, Milan R, Amirav L. Gold@Carbon Nitride Yolk and Core-Shell Nanohybrids. ACS APPLIED MATERIALS & INTERFACES 2022; 14:21340-21347. [PMID: 35467354 DOI: 10.1021/acsami.2c01906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Graphitic carbon nitride (g-C3N4) is a promising conjugated polymer with visible light responsiveness and numerous intriguing characteristics that make it highly beneficial for a myriad of potential applications. A novel design and universal approach for the fabrication of unique plasmonic g-C3N4 nanoscale hybrids, with well-controlled morphology, is presented. A single gold nanoprism is encapsulated within dense or hollow g-C3N4 spheres for the formation of Au@g-C3N4 core-shell and Au@g-C3N4 yolk-shell nanohybrids. Au nanoprisms were chosen duo to the strong (visible range) plasmon resonances and electromagnetic field hotspots formed at their sharp corners. The incorporation of Au nanoprisms into the g-C3N4 nanospheres results in a dramatic ∼threefold rise in the emission of plasmonic g-C3N4 yolk-shell nanohybrids and ∼3.6-fold enhancement of the photocurrent density obtained from the plasmonic g-C3N4 core-shell nanohybrids, when compared with the g-C3N4 hollow nanospheres. Hence, these hybrids can potentially benefit applications in the areas spanning from solar energy harvesting to biomedical imaging and theranostics.
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Affiliation(s)
- Firdoz Shaik
- Schulich Faculty of Chemistry, Technion─Israel Institute of Technology, Haifa 32000, Israel
| | - Riccardo Milan
- Schulich Faculty of Chemistry, Technion─Israel Institute of Technology, Haifa 32000, Israel
| | - Lilac Amirav
- Schulich Faculty of Chemistry, Technion─Israel Institute of Technology, Haifa 32000, Israel
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16
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Mai H, Chen D, Tachibana Y, Suzuki H, Abe R, Caruso RA. Developing sustainable, high-performance perovskites in photocatalysis: design strategies and applications. Chem Soc Rev 2021; 50:13692-13729. [PMID: 34842873 DOI: 10.1039/d1cs00684c] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Solar energy is attractive because it is free, renewable, abundant and sustainable. Photocatalysis is one of the feasible routes to utilize solar energy for the degradation of pollutants and the production of fuel. Perovskites and their derivatives have received substantial attention in both photocatalytic wastewater treatment and energy production because of their highly tailorable structural and physicochemical properties. This review illustrates the basic principles of photocatalytic reactions and the application of these principles to the design of robust and sustainable perovskite photocatalysts. It details the structures of the perovskites and the physics and chemistry behind photocatalytic reactions and describes the advantages and limitations of popular strategies for the design of photoactive perovskites. This is followed by examples of how these strategies are applied to enhance the photocatalytic efficiency of oxide, halide and oxyhalide perovskites, with a focus on materials with potential for practical application, that is, not containing scarce or toxic elements. It is expected that this overview of the development of photocatalysts and deeper understanding of photocatalytic principles will accelerate the exploitation of efficient perovskite photocatalysts and bring about effective solutions to the energy and environmental crisis.
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Affiliation(s)
- Haoxin Mai
- Applied Chemistry and Environmental Science, School of Science, STEM College, RMIT University, GPO Box 2476, Melbourne, Victoria 3001, Australia.
| | - Dehong Chen
- Applied Chemistry and Environmental Science, School of Science, STEM College, RMIT University, GPO Box 2476, Melbourne, Victoria 3001, Australia.
| | - Yasuhiro Tachibana
- School of Engineering, STEM College, RMIT University, Bundoora, Victoria 3083, Australia
| | - Hajime Suzuki
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Ryu Abe
- Department of Energy and Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Rachel A Caruso
- Applied Chemistry and Environmental Science, School of Science, STEM College, RMIT University, GPO Box 2476, Melbourne, Victoria 3001, Australia.
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17
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Nanostructural synergism as MnNC channels in manganese (IV) oxide and fluffy g-C 3N 4 layered composite with exceptional catalytic capabilities. J Colloid Interface Sci 2021; 610:258-270. [PMID: 34922079 DOI: 10.1016/j.jcis.2021.12.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 11/27/2021] [Accepted: 12/04/2021] [Indexed: 11/21/2022]
Abstract
The avenues of catalysis and material science are always accepted and it is hoped that a state-of-the-art catalyst with exceptional intrinsic redox characteristics would be produced. This study focused on developing a multi-featured catalyst of high economical and commercial standards to meet the multi-directional applications of environmental and energy demands. Manganese (IV) oxide nanosheets made of fluffy-sheet-like g-C3N4 material were successfully synthesized by pyrolysis method. The electron-rich g-C3N4 network and semiconducting metallic oxides of MnO2 nanosheets generated high electron density interfaces within the intra-composite structure. The input of active interfaces along with strong metal-to-support interactions achieved between two parallel nanosheets in MnO2/g-C3N4 catalyst intrinsically boosted up its electrochemical and optical characteristics for it to be used in multi-catalytic fields. Successful trails of catalysts' performance have been made in three major catalytic fields with enhanced activities such as heterogeneous catalysis (reduction of nitrobenzene with rate constant of "K = 0.734 min-1" and hydrogenation of styrene with "100% conversion" efficiency, including negligible change in five consecutive cycles), photocatalysis (degradation of methylene blue dye model within 20 min with negligible change in five consecutive cycles) and electrocatalysis (oxygen reduction reactions having comparable "diffusion-limited-current density" behaviour with that of the commercial Pt/C catalyst). The enhanced performance of catalysts in transforming chemicals, degrading organic pollutant species and producing sustainable energy resources from air oxygen can mitigate the challenges faced in environmental and energy crises, respectively.
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18
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Nanocomposite of CeVO4/BiVO4 Loaded on Reduced Graphene Oxide for the Photocatalytic Degradation of Methyl Orange. J CLUST SCI 2021. [DOI: 10.1007/s10876-021-02189-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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19
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Li X, Song S, Gao Y, Ge L, Song W, Ma T, Liu J. Identification of the Charge Transfer Channel in Cobalt Encapsulated Hollow Nitrogen-Doped Carbon Matrix@CdS Heterostructure for Photocatalytic Hydrogen Evolution. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2101315. [PMID: 34160911 DOI: 10.1002/smll.202101315] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Indexed: 06/13/2023]
Abstract
Water splitting to H2 by photocatalysis remains an effective strategy to alleviate the energy crisis. Unfortunately, single-component photocatalyst still suffers from sluggish reaction kinetics. In this work, a noble-metal free photocatalytic system of nitrogen-doped carbon@Co embedded in carbon nanotubes (NC@Co-NCT)/cadmium sulfide (CdS) is fabricated by coupling CdS nanorods with the metal-organic framework-derived Co encapsulated nitrogen-doped carbon (NC) material. The optimal photocatalytic activity of NC@Co-NCT/CdS is determined to be 3.8 mmol h-1 g-1 , which is ≈5.8 times of CdS. By combining the experimental evidences and density functional theory calculations, a novel photoelectron transfer channel in the heterojunction interfaces is revealed, expediting the migration and separation of photo-induced charge carriers of CdS. Moreover, the presence of Co nanoclusters can act as the active sites, boosting the H2 evolution reaction. This study can present a new avenue to design advanced photocatalysts with high-efficiency electrons and holes separation.
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Affiliation(s)
- Xuli Li
- State Key Laboratory of Heavy Oil Processing, College of New Energy and Materials, China University of Petroleum Beijing, Beijing, 102249, China
| | - Shaojia Song
- State Key Laboratory of Heavy Oil Processing, College of New Energy and Materials, China University of Petroleum Beijing, Beijing, 102249, China
| | - Yangqin Gao
- State Key Laboratory of Heavy Oil Processing, College of New Energy and Materials, China University of Petroleum Beijing, Beijing, 102249, China
| | - Lei Ge
- State Key Laboratory of Heavy Oil Processing, College of New Energy and Materials, China University of Petroleum Beijing, Beijing, 102249, China
| | - Weiyu Song
- State Key Laboratory of Heavy Oil Processing, College of New Energy and Materials, China University of Petroleum Beijing, Beijing, 102249, China
- College of Science, China University of Petroleum Beijing, Beijing, 102249, China
| | - Tianyi Ma
- Centre for Translational Atomaterials, Swinburne University of Technology, Hawthorn, VIC, 3122, Australia
| | - Jian Liu
- State Key Laboratory of Heavy Oil Processing, College of New Energy and Materials, China University of Petroleum Beijing, Beijing, 102249, China
- College of Science, China University of Petroleum Beijing, Beijing, 102249, China
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20
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Wu Y, Zhang J, Long B, Zhang H. The Thermodynamic Stability, Electronic and Photocatalytic Properties of the ZnWO 4(100) Surface as Predicted by Screened Hybrid Density Functional Theory. ACS OMEGA 2021; 6:15057-15067. [PMID: 34151086 PMCID: PMC8210413 DOI: 10.1021/acsomega.1c01214] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Accepted: 05/20/2021] [Indexed: 06/13/2023]
Abstract
Zinc tungstate (ZnWO4) is an outstanding photocatalyst for water splitting and organic contaminant degradation under visible light irradiation. Surface termination stabilities are significant for understanding the photochemical oxidation and reactions on the ZnWO4 surface. Based on density functional theory, we calculated the thermodynamic stability of possible surface terminations for ZnWO4(100). The surface stability phase diagrams show that the Zn2O4-Zn8W6O28, W2O4-Zn8W10O36, and Zn2-Zn8W6O24 terminations of ZnWO4(100) can be stabilized under certain thermodynamic equilibrium conditions. The electronic structures for these three possible stability surface terminations are calculated based on the Heyd-Scuseria-Ernzerhof (HSE06) hybrid functional to give dependable theoretical band gap values. It is found that the surface states of W2O4-Zn8W10O36 termination are in the band gap, which shows a delocalized performance. The calculated absorption coefficients of W2O4-Zn8W10O36 termination show stronger absorption than bulk ZnWO4 in the visible-light region. The band edge calculation shows that the valence band maximum and conduction band minimum of the W2O4-Zn8W10O36 termination can fulfill the hydrogen evolution reaction and oxygen evolution reaction requirements at the same time. Furthermore, work functions are extraordinarily distinct for various surface terminations. This result suggests that the ZnWO4-based direct Z-scheme heterostructure can be controlled by obtaining the thermodynamically preferred surface termination under suitable conditions. Our results can predict ZnWO4(100) surface structures and properties under the entire range of accessible environmental conditions.
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Affiliation(s)
- Yonggang Wu
- College
of Physics, Sichuan University, Sichuan 610065, China
- School
of Physics and Electronic Science, Guizhou
Education University, Guiyang 550018, China
| | - Jihua Zhang
- Guizhou
Provincial Key Laboratory of Computational Nano-Material Science, Guizhou Education University, Guiyang 550018, China
| | - Bingwei Long
- College
of Physics, Sichuan University, Sichuan 610065, China
| | - Hong Zhang
- College
of Physics, Sichuan University, Sichuan 610065, China
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21
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Alzakia FI, Tan SC. Liquid-Exfoliated 2D Materials for Optoelectronic Applications. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:e2003864. [PMID: 34105282 PMCID: PMC8188210 DOI: 10.1002/advs.202003864] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 01/19/2021] [Indexed: 05/14/2023]
Abstract
Two-dimensional (2D) materials have attracted tremendous research attention in recent days due to their extraordinary and unique properties upon exfoliation from the bulk form, which are useful for many applications such as electronics, optoelectronics, catalysis, etc. Liquid exfoliation method of 2D materials offers a facile and low-cost route to produce large quantities of mono- and few-layer 2D nanosheets in a commercially viable way. Optoelectronic devices such as photodetectors fabricated from percolating networks of liquid-exfoliated 2D materials offer advantages compared to conventional devices, including low cost, less complicated process, and higher flexibility, making them more suitable for the next generation wearable devices. This review summarizes the recent progress on metal-semiconductor-metal (MSM) photodetectors fabricated from percolating network of 2D nanosheets obtained from liquid exfoliation methods. In addition, hybrids and mixtures with other photosensitive materials, such as quantum dots, nanowires, nanorods, etc. are also discussed. First, the various methods of liquid exfoliation of 2D materials, size selection methods, and photodetection mechanisms that are responsible for light detection in networks of 2D nanosheets are briefly reviewed. At the end, some potential strategies to further improve the performance the devices are proposed.
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Affiliation(s)
- Fuad Indra Alzakia
- Department of Materials Science and EngineeringNational University of Singapore9 Engineering drive 1Singapore117574Singapore
| | - Swee Ching Tan
- Department of Materials Science and EngineeringNational University of Singapore9 Engineering drive 1Singapore117574Singapore
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22
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Wen N, Zhang K, Feng J, Zhou Z, Chen S, Wang Y, Liu S, Kuang Q, Dong Y, Zhao Y. One-step in situ hydrothermal synthesis of layered Ni3Ge2O5(OH)4/carbon nanocomposite with superior sodium storage properties. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115171] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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23
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Liang Q, Liu X, Wang J, Liu Y, Liu Z, Tang L, Shao B, Zhang W, Gong S, Cheng M, He Q, Feng C. In-situ self-assembly construction of hollow tubular g-C 3N 4 isotype heterojunction for enhanced visible-light photocatalysis: Experiments and theories. JOURNAL OF HAZARDOUS MATERIALS 2021; 401:123355. [PMID: 32659580 DOI: 10.1016/j.jhazmat.2020.123355] [Citation(s) in RCA: 67] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 06/09/2020] [Accepted: 06/25/2020] [Indexed: 05/15/2023]
Abstract
A highly reactive hollow tubular g-C3N4 isotype heterojunction (SCN-CN) was designed to enhance visible light absorption and manipulate the directed transfer of electrons and holes. The results of UV-vis DRS, XPS valence band and DFT theoretical calculations indicated S doping increases the visible-light absorption capacity and changed the ba nd gap structure of g-C3N4 (CN), resulting in the transfer of electrons from the CN to the SCN and holes from the SCN to the CN under visible light. In addition, the tubular structure of the SCN-CN facilitated the transfer of electrons in the longitudinal direction, which reduced charge carrier recombination. Furthermore, the optical properties, electronic structure, and electron transfer of SCN-CN were also studied by experiments and theoretical calculations. The antibiotic tetracycline hydrochloride (TCH) and dye Rhodamine B (RHB) were subjected to evaluate the photocatalytic performance of SCN-CN. The scavenger tests and ESR data showed that the h+, ·O2- and ·OH worked together in the photocatalytic process. Moreover, the photocatalytic degradation pathway was analyzed by LC-MS. This study synthesized a hollow tubular CN isotype heterojunction with high visible-light photocatalytic performance and provided a theoretical basis for CN isotype heterojunction.
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Affiliation(s)
- Qinghua Liang
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Xiaojuan Liu
- The First Affiliated Hospital of Hunan University of Chinese Medicine, Changsha, 410007, PR China
| | - Jiajia Wang
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Yang Liu
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Zhifeng Liu
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China.
| | - Lin Tang
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China.
| | - Binbin Shao
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Wei Zhang
- The First Affiliated Hospital of Hunan University of Chinese Medicine, Changsha, 410007, PR China
| | - Shanxi Gong
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, PR China
| | - Min Cheng
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Qingyun He
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
| | - Chengyang Feng
- College of Environmental Science and Engineering, Hunan University and Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, PR China
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24
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Li D, Zhao Q, Ren Q, Song Z, Zhang Q, Long M, Li H. Double activating peroxymonosulfate with g-C 3N 4/Fe 2(MoO 4) 3 to enhance photocatalytic activity under visible light irradiation. NEW J CHEM 2021. [DOI: 10.1039/d1nj02915k] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The peroxymonosulfate was double activated by photogenerated e−/h+ and Fe(iii).
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Affiliation(s)
- Di Li
- School of Chemistry and Chemical Engineering, Xi’an University of Architecture and Technology, Xi’an, 710055, China
| | - Qianqian Zhao
- School of Chemistry and Chemical Engineering, Xi’an University of Architecture and Technology, Xi’an, 710055, China
| | - Qiaoxia Ren
- School of Chemistry and Chemical Engineering, Xi’an University of Architecture and Technology, Xi’an, 710055, China
| | - Ziyue Song
- School of Chemistry and Chemical Engineering, Xi’an University of Architecture and Technology, Xi’an, 710055, China
| | - Qiuli Zhang
- School of Chemistry and Chemical Engineering, Xi’an University of Architecture and Technology, Xi’an, 710055, China
| | - Mingyang Long
- School of Chemistry and Chemical Engineering, Xi’an University of Architecture and Technology, Xi’an, 710055, China
| | - Hongmiao Li
- School of Chemistry and Chemical Engineering, Xi’an University of Architecture and Technology, Xi’an, 710055, China
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25
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Lu S, Liu L, Demissie H, An G, Wang D. Design and application of metal-organic frameworks and derivatives as heterogeneous Fenton-like catalysts for organic wastewater treatment: A review. ENVIRONMENT INTERNATIONAL 2021; 146:106273. [PMID: 33264734 DOI: 10.1016/j.envint.2020.106273] [Citation(s) in RCA: 59] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 11/02/2020] [Accepted: 11/05/2020] [Indexed: 05/25/2023]
Abstract
Advanced oxidation process (AOP), with a high oxidation efficiency, fast reaction speed (relatively no secondary pollution), has become one of the core technologies of industrial wastewater and advanced drinking water treatment. Heterogeneous Fenton-like oxidation process (HFOP) is a kind of AOP, which developed rapidly in recent years in such a way to overcome the disadvantages of traditional Fenton reaction. Metal-organic frameworks (MOFs) and their derivatives become essential heterogeneous catalysts for organics mineralization due to the large specific surface area, abundant active sites, and ease of structural regulation. However, the knowledge gap on the mechanism and the fate of heterogeneous catalyst species during organics degradation activities by MOFs presents considerable impediments, particularly for a wide application and scaling up the process. This work has the potential to provide guidance and ideas for researchers and engineers in the fields of environmental remediation, environmental catalysis and functional materials. This review focuses on clarifying the critical mechanism of •OH production from MOFs and derivatives as well as its action on the organic's degradation process. The recent developments in MOF based HFOP are compared, and more attention is paid for the following aspects in this review: (1) classifies systematically progressive modification methods of MOFs by chemical and physical treatments; (2) analyzes the fate of catalytic species during treating organic wastewater; (3) proposes design ideas and principles for improving the performance of MOFs catalysts; (4) discusses the main factors influencing the catalytic properties and practical application; (5) summarizes the possible research challenges and directions for MOFs and their derivatives as catalysts applied to wastewater treatment in the future.
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Affiliation(s)
- Sen Lu
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Libing Liu
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Hailu Demissie
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Guangyu An
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
| | - Dongsheng Wang
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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26
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Wang H, Bai S, Zhao P, Tan L, Ning C, Liu G, Wang J, Shen T, Zhao Y, Song YF. Green light (550 nm) driven tunable syngas synthesis from CO 2 photoreduction using heterostructured layered double hydroxide/TiC photocatalysts. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01366a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Under visible light, LDH/TiC photocatalysts were prepared and exhibited tunable syngas synthesis with different CO/H2 ratios.
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Affiliation(s)
- Huijuan Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029 Beijing, P. R. China
| | - Sha Bai
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029 Beijing, P. R. China
| | - Pu Zhao
- Department of Chemistry, University of Oxford, Oxford OX1 3QR, UK
| | - Ling Tan
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029 Beijing, P. R. China
| | - Chenjun Ning
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029 Beijing, P. R. China
| | - Guihao Liu
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029 Beijing, P. R. China
| | - Jikang Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029 Beijing, P. R. China
| | - Tianyang Shen
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029 Beijing, P. R. China
| | - Yufei Zhao
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029 Beijing, P. R. China
| | - Yu-Fei Song
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, 100029 Beijing, P. R. China
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27
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Majdoub M, Anfar Z, Amedlous A. Emerging Chemical Functionalization of g-C 3N 4: Covalent/Noncovalent Modifications and Applications. ACS NANO 2020; 14:12390-12469. [PMID: 33052050 DOI: 10.1021/acsnano.0c06116] [Citation(s) in RCA: 107] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Atomically 2D thin-layered structures, such as graphene nanosheets, graphitic carbon nitride nanosheets (g-C3N4), hexagonal boron nitride, and transition metal dichalcogenides are emerging as fascinating materials for a good array of domains owing to their rare physicochemical characteristics. In particular, graphitic carbon nitride has turned into a hot subject in the scientific community due to numerous qualities such as simple preparation, electrochemical properties, high adsorption capacity, good photochemical properties, thermal stability, and acid-alkali chemical resistance, etc. Basically, g-C3N4 is considered as a polymeric material consisting of N and C atoms forming a tri-s-triazine network connected by planar amino groups. In comparison with most C-based materials, g-C3N4 possesses electron-rich characteristics, basic moieties, and hydrogen-bonding groups owing to the presence of hydrogen and nitrogen atoms; therefore, it is taken into account as an interesting nominee to further complement carbon in applications of functional materials. Nevertheless, g-C3N4 has some intrinsic limitations and drawbacks mainly related to a relatively poor specific surface area, rapid charge recombination, a limited light absorption range, and a poor dispersibility in both aqueous and organic mediums. To overcome these shortcomings, numerous chemical modification approaches have been conducted with the aim of expanding the range of application of g-C3N4 and enhancing its properties. In the current review, the comprehensive survey is conducted on g-C3N4 chemical functionalization strategies including covalent and noncovalent approaches. Covalent approaches consist of establishing covalent linkage between the g-C3N4 structure and the chemical modifier such as oxidation/carboxylation, amidation, polymer grafting, etc., whereas the noncovalent approaches mainly consist of physical bonding and intermolecular interaction such as van der Waals interactions, electrostatic interactions, π-π interactions, and so on. Furthermore, the preparation, characterization, and diverse applications of functionalized g-C3N4 in various domains are described and recapped. We believe that this work will inspire scientists and readers to conduct research with the aim of exploring other functionalization strategies for this material in numerous applications.
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Affiliation(s)
- Mohammed Majdoub
- Laboratory of Materials, Catalysis & Valorization of Natural Resources, Hassan II University, Casablanca 20000, Morocco
| | - Zakaria Anfar
- Laboratory of Materials & Environment, Ibn Zohr University, Agadir 80000, Morocco
- Institute of Materials Science of Mulhouse, Haute Alsace University, Mulhouse 68100, France
- Strasbourg University, Strasbourg 67081, France
| | - Abdallah Amedlous
- Laboratory of Materials, Catalysis & Valorization of Natural Resources, Hassan II University, Casablanca 20000, Morocco
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28
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Abbasi_Asl H, Moradi Z, Ghaedi M, Sabzehmeidani MM. Degradation of Orange G and Trypan blue using Ag2C2O4/Ag/g-C3N4 composites as efficient photocatalyst under solar irradiation. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112755] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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29
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Roy S. Tale of Two Layered Semiconductor Catalysts toward Artificial Photosynthesis. ACS APPLIED MATERIALS & INTERFACES 2020; 12:37811-37833. [PMID: 32805975 DOI: 10.1021/acsami.0c11245] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The ever-increasing reliance on nonrenewable fossil fuels due to massive urbanization and industrialization created problems such as depletion of the primary feedstock and raised the atmospheric CO2 levels causing global warming. A smart and promising approach is artificial photosynthesis that photocatalytically valorizes CO2 into high-value chemicals. The inexpensive layered semiconductors like g-C3N4 and rGO or GO have the potential to make the process practically feasible for real applications. The suitable band positions with respect to the reduction potentials coupled with the typical surface properties of these layered semiconductors play a beneficial role in photoreduction of CO2. Additionally, the creation of heterojunction interfaces to achieve the Z-scheme by anchoring g-C3N4 and rGO with another semiconductor with proper band alignment and dispersing plasmonic nano metals to obtain Schottky barriers on the layered surfaces also help retarding the electron-hole recombination and boost up the catalytic efficacy. Extensive exploration happened in recent years toward artificial photosynthesis over these materials, which needs a critical compendium. Surprisingly, in spite of the recent explosion of studies on photocatalytic reduction of CO2 over metal-free semiconductors, there is not a single review on comparing the mechanistic aspects of photoreduction of CO2 over the layered semiconductors g-C3N4 and rGO. This review stands out as a unique documentation, where the mechanism of photocatalytic reduction of CO2 over this set of materials is critically examined in the context of band and surface modifications. An overall conclusion and outlook at the end indicates the need to develop prototypes for artificial photosynthesis with these well-studied semiconducting layered materials to yield solar fuels.
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Affiliation(s)
- Sounak Roy
- Department of Chemistry, Birla Institute of Technology and Science (BITS) Pilani, Hyderabad Campus, Hyderabad 500078, India
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30
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Raza W, Faraz M. Novel g-C 3N 4/Fe-ZnO/RGO nanocomposites with boosting visible light photocatalytic activity for MB, Cr (VI), and outstanding catalytic activity toward para-nitrophenol reduction. NANOTECHNOLOGY 2020; 31:325603. [PMID: 32320969 DOI: 10.1088/1361-6528/ab8c07] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A novel g-C3N4/Fe-ZnO/RGO nanocomposite has been synthesized using the facile solvothermal method to boost the catalytic efficiency of ZnO. The structure and morphology of nanocomposites were examined by a wide range of characterization methods. The obtained g-C3N4/Fe-ZnO/RGO nanocomposite (Z-scheme heterostructure) exhibits improved photocatalytic activity toward the photodegradation of MB, Cr (VI) under visible-light irradiation and 4-nitrophenol reduction. The enhancement in activity of nanocomposite is ascribed to a unique heterostructure system, which facilitates excellent transport and separation of the photogenerated charge carrier, resulting in prolonged lifetime leading to continuous generation of reactive species. Moreover, the synergistic effect on the interface of ZnO and g-C3N4 and the introduction of reduced graphene oxide (RGO) serve as a booster for charge separation at the Z-scheme, which ultimately speeds up the degradation of pollutants. The present study provides a novel and facile approach for establishing an efficient nanocomposite for environmental remediation.
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Affiliation(s)
- Waseem Raza
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India. Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
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31
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Sun Q, Hao J, Zheng S, Wan P, Li J, Zhang D, Li Y, Wang T, Wang Y. 2D/2D heterojunction of g-C 3N 4/SnS 2: room-temperature sensing material for ultrasensitive and rapid-recoverable NO 2 detection. NANOTECHNOLOGY 2020; 31:425502. [PMID: 32590366 DOI: 10.1088/1361-6528/aba05b] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Heterojunction engineering plays an indispensable role in improving gas-sensing performance. However, rational heterojunction engineering to achieve room-temperature NO2 sensing with both high response and rapid recovery is still a challenge. Herein, a 2D/2D heterojunction of g-C3N4/SnS2 is designed to improve the sensing performance of SnS2 and used for ultrasensitive and rapid-recoverable NO2 detection at room temperature. The pristine SnS2 fails to work at room temperature because of its high resistivity and weak adsorption to NO2. After combination with g-C3N4 nanosheets, the g-C3N4/SnS2-based sensor exhibits an extremely high response (503%) and short recovery time (166 s) towards 1 ppm NO2 at room temperature. The improved sensing performance is primarily attributed to the increased adsorption sites and enhanced charge transfer induced by the 2D/2D heterojunctions with large interface contact area. This achievement of g-C3N4/SnS2 2D/2D heterostructures demonstrates a promising pathway for the design of sensitive gas-sensing material based on a 2D/2D heterojunction strategy.
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Affiliation(s)
- Quan Sun
- School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, People's Republic of China
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Acharya L, Nayak S, Pattnaik SP, Acharya R, Parida K. Resurrection of boron nitride in p-n type-II boron nitride/B-doped-g-C3N4 nanocomposite during solid-state Z-scheme charge transfer path for the degradation of tetracycline hydrochloride. J Colloid Interface Sci 2020; 566:211-223. [DOI: 10.1016/j.jcis.2020.01.074] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 01/13/2020] [Accepted: 01/19/2020] [Indexed: 10/25/2022]
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33
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Enhanced Power Conversion Efficiency of Dye-Sensitized Solar Cells by Band Edge Shift of TiO 2 Photoanode. Molecules 2020; 25:molecules25071502. [PMID: 32224956 PMCID: PMC7181208 DOI: 10.3390/molecules25071502] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 03/24/2020] [Accepted: 03/25/2020] [Indexed: 11/24/2022] Open
Abstract
By simple soaking titanium dioxide (TiO2) films in an aqueous Na2S solution, we could prepare surface-modified photoanodes for application to dye-sensitized solar cells (DSSCs). An improvement in both the open-circuit voltage (Voc) and the fill factor (FF) was observed in the DSSC with the 5 min-soaked photoanode, compared with those of the control cell without any modification. The UV–visible absorbance spectra, UPS valence band spectra, and dark current measurements revealed that the Na2S modification led to the formation of anions on the TiO2 surface, and thereby shifted the conduction band edge of TiO2 in the negative (upward) direction, inducing an increase of 29 mV in the Voc. It was also found that the increased FF value in the surface-treated device was attributed to an elevation in the shunt resistance.
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34
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Peng L, Zheng RR, Feng DW, Yu H, Dong XT. Synthesis of eco-friendly porous g-C3N4/SiO2/SnO2 composite with excellent visible-light responsive photocatalysis. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2019.07.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
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35
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Wang Y, Zheng M, Zhao H, Qin H, Fan W, Zhao X. Zn2GeO4−x/ZnS heterojunctions fabricated via in situ etching sulfurization for Pt-free photocatalytic hydrogen evolution: interface roughness and defect engineering. Phys Chem Chem Phys 2020; 22:10265-10277. [DOI: 10.1039/d0cp01308k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The Zn2GeO4−x/ZnS intimate heterojunctions were synthesized by in situ etching sulfurization, which realized photocatalytic H2 evolution from water without the Pt co-catalyst by the synergism between interface topology and oxygen defect control.
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Affiliation(s)
- Yongli Wang
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
- China
| | - Mingyue Zheng
- Institute of Crystal Materials and State Key Laboratory of Crystal Materials
- Shandong University
- Jinan
- China
| | - Hongkai Zhao
- Institute of Crystal Materials and State Key Laboratory of Crystal Materials
- Shandong University
- Jinan
- China
| | - Hao Qin
- Institute of Crystal Materials and State Key Laboratory of Crystal Materials
- Shandong University
- Jinan
- China
| | - Weiliu Fan
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan
- China
| | - Xian Zhao
- Institute of Crystal Materials and State Key Laboratory of Crystal Materials
- Shandong University
- Jinan
- China
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36
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Synthesis of Z-scheme g-C3N4 nanosheets/Ag3PO4 photocatalysts with enhanced visible-light photocatalytic performance for the degradation of tetracycline and dye. CHINESE CHEM LETT 2020. [DOI: 10.1016/j.cclet.2019.05.029] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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37
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Srivastava BB, Gupta SK, Li Y, Mao Y. Bright persistent green emitting water-dispersible Zn2GeO4:Mn nanorods. Dalton Trans 2020; 49:7328-7340. [DOI: 10.1039/d0dt00361a] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This work reports on a green and facile approach for designing bright and persistent green luminescent Zn2GeO4:Mn2+ nano crystals with high quantum yield (∼52%) and water dispersibility designated for LEDs, security, and bio imaging.
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Affiliation(s)
| | - Santosh K. Gupta
- Radiochemistry Division
- Bhabha Atomic Research Centre
- Mumbai-400085
- India
| | - Yang Li
- School of Physics and Optoelectronic Engineering
- Guangdong University of Technology
- Guangzhou 510006
- China
| | - Yuanbing Mao
- Department of Chemistry
- Illinois Institute of Technology
- Chicago
- USA
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38
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Kim JY, Kim KH, Kim DH, Han YS. Effects of a dianion compound as a surface modifier on the back reaction of photogenerated electrons in TiO2-based solar cells. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2018.04.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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39
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Zhang Y, Dong Y, Wang G, Jiang P, Zhao S, Li Y, Wu X, Miao H, Li J, Lyu J, Wang Y, Zhu Y. Photo-sensitization of BiOCl by CuInS2 Surface Layer for Photoelectrochemical Cathode. Catal Letters 2019. [DOI: 10.1007/s10562-019-03039-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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40
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Wu N, Wang YT, Wang XY, Guo FN, Wen H, Yang T, Wang JH. Enhanced peroxidase-like activity of AuNPs loaded graphitic carbon nitride nanosheets for colorimetric biosensing. Anal Chim Acta 2019; 1091:69-75. [PMID: 31679576 DOI: 10.1016/j.aca.2019.09.072] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Revised: 09/27/2019] [Accepted: 09/29/2019] [Indexed: 11/30/2022]
Abstract
Nanozymes have emerged as promising alternatives to overcome the high cost and low stability issues of natural enzymes. Particularly, those with peroxidase-like activities have been extensively studied to construct versatile biosensors. In this article, we demonstrate that the modification of the graphitic carbon nitride nanosheets (g-C3N4 nanosheets) by plasmonic gold nanoparticles (AuNPs) greatly enhances its catalytic performance as peroxidase mimetic. In the presence of H2O2, the AuNPs@g-C3N4 nanosheets can catalyze the redox reaction of 3,3',5,5'- tetramethylbenzidine (TMB) to produce a blue color. Based on the observation, a colorimetric sensing method for glucose is further developed with the assistance of glucose oxidase (GOx). The linear range for glucose is from 5 to 100 μmol L-1 (R2 = 0.9967) and the limit of detection (LOD) is 1.2 μmol L-1. The LOD can be further lowered down to 0.75 μmol L-1 by using H2SO4 as termination agent and measuring the absorbance of the yellow product at λ = 451 nm. Moreover, the practical usefulness of AuNPs@g-C3N4 nanosheets as a peroxidase nanozyme for glucose determination in human serum and urine is also demonstrated.
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Affiliation(s)
- Na Wu
- Research Center for Analytical Sciences, Department of Chemistry, College of Sciences, Box 332, Northeastern University, Shenyang, 110819, China
| | - Yi-Ting Wang
- Research Center for Analytical Sciences, Department of Chemistry, College of Sciences, Box 332, Northeastern University, Shenyang, 110819, China
| | - Xiao-Yan Wang
- Research Center for Analytical Sciences, Department of Chemistry, College of Sciences, Box 332, Northeastern University, Shenyang, 110819, China
| | - Feng-Na Guo
- Research Center for Analytical Sciences, Department of Chemistry, College of Sciences, Box 332, Northeastern University, Shenyang, 110819, China
| | - Hui Wen
- Research Center for Analytical Sciences, Department of Chemistry, College of Sciences, Box 332, Northeastern University, Shenyang, 110819, China
| | - Ting Yang
- Research Center for Analytical Sciences, Department of Chemistry, College of Sciences, Box 332, Northeastern University, Shenyang, 110819, China.
| | - Jian-Hua Wang
- Research Center for Analytical Sciences, Department of Chemistry, College of Sciences, Box 332, Northeastern University, Shenyang, 110819, China
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41
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Wang K, Li J, Zhang G. Ag-Bridged Z-Scheme 2D/2D Bi 5FeTi 3O 15/g-C 3N 4 Heterojunction for Enhanced Photocatalysis: Mediator-Induced Interfacial Charge Transfer and Mechanism Insights. ACS APPLIED MATERIALS & INTERFACES 2019; 11:27686-27696. [PMID: 31282639 DOI: 10.1021/acsami.9b05074] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Heterojunction photocatalysts have attracted widespread interest in photocatalysis because of their high-efficiency interfacial charge-transfer characteristics of nanoarchitectures. In this study, Ag-bridged 2D/2D Bi5FeTi3O15/ultrathin g-C3N4 Z-scheme heterojunction photocatalysts with powerful interfacial charge transfer has been synthesized via a facile ultrasound method coupled with a photoreduction strategy for efficient photocatalytic degradation of antibiotics. The morphology analysis displays that the bridged Ag nanoparticles were anchored on the interface of layered Bi5FeTi3O15 and ultrathin g-C3N4 nanosheets. Owing to its unique 2D/2D ternary heterostructure, the Bi5FeTi3O15/2%Ag/10% ultrathin g-C3N4 composite exhibited the best tetracycline degradation performance under visible-light and simulated solar irradiation. Meanwhile, the intermediates and degradation pathways were proposed by a liquid-phase mass spectrometry system. Characterizations and density functional theory studies together verify that the matched band structure of Bi5FeTi3O15 and g-C3N4 could induce a superfast Z-scheme interfacial charge-transfer path. More importantly, bridged Ag nanoparticles in the 2D/2D heterojunction extended the light absorption range and prolonged the lifetime of photogenerated electron-holes induced by Bi5FeTi3O15. This work affords a promising approach for designing multicomponent Z-scheme heterojunction photocatalysts for highly efficient photocatalytic application.
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42
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Zhou J, Zhang W, Zhao H, Tian J, Zhu Z, Lin N, Qian Y. Growth of Bouquet-like Zn 2GeO 4 Crystal Clusters in Molten Salt and Understanding the Fast Na-Storage Properties. ACS APPLIED MATERIALS & INTERFACES 2019; 11:22371-22379. [PMID: 31149799 DOI: 10.1021/acsami.9b05003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The exploration of high-performance anode materials is imperative for the development of sodium-ion batteries (SIBs). Herein, a molten-salt-assisted approach is developed to prepare crystallized Zn2GeO4 clusters constructed by interconnected nanorods, and the Na-ion storage mechanism is studied systemically through in situ X-ray diffraction, ex situ X-ray photoelectron spectroscopy, and high-resolution transmission microscopy associated with galvanostatic intermittent titration technique. The Zn2GeO4 anode undergoes conversion reactions followed by the alloying reaction. The large channel in the Zn2GeO4 crystal structure ensures insertion of sodium ions. The amorphous transformation during the initial discharge process increases the active site for the fast electrochemical reaction. As the anode for SIBs, the Zn2GeO4 cluster exhibits good rate capability with a capacity retention of 111.1 mA h g-1 at 20 A g-1 in half cells and 118.9 mA h g-1 at 2 A g-1 in full cells, associated with a capacity of 184.2 mA h g-1 at 0.5 A g-1 after 500 cycles. The ex situ scanning electron microscopy images of the electrode material disclose that the hierarchical structure can accommodate the volume variation of Zn2GeO4 during discharge/charge cycling, facilitating long cycling stability. The investigation of Zn2GeO4 provides new insight for the development of high-rate anode materials for SIBs.
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Affiliation(s)
| | | | | | - Jie Tian
- Experimental Center of Engineering and Material Science , University of Science and Technology of China , Hefei , Anhui 230026 , P. R. China
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43
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Enhancement of solar cell performance through the formation of a surface dipole on polyacrylonitrile-treated TiO2 photoelectrodes. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.01.036] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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44
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Lai YS, Dai YM, Jehng JM. Photocatalytic activity of the (NH4)2V6O16/g-C3N4 composite catalysts for water splitting applications. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.06.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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45
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Li J, Li Y, Zhang G, Huang H, Wu X. One-Dimensional/Two-Dimensional Core-Shell-Structured Bi 2O 4/BiO 2- x Heterojunction for Highly Efficient Broad Spectrum Light-Driven Photocatalysis: Faster Interfacial Charge Transfer and Enhanced Molecular Oxygen Activation Mechanism. ACS APPLIED MATERIALS & INTERFACES 2019; 11:7112-7122. [PMID: 30675792 DOI: 10.1021/acsami.8b21693] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Deliberate tuning of nanoparticles encapsulated with nanosheet shells can bring about fascinating photocatalytic properties because of the fast charge-transfer characteristics of a nanosized core-shell structure. Herein, a novel core-shell-structured Bi2O4/BiO2- x composite was fabricated through a one-step hydrothermal method. The core-shell Bi2O4/BiO2- x composite presented distinct optical absorption property, including UV, visible, and near-infrared (NIR) light regions. Compared to Bi2O4 and BiO2- x, the Bi2O4/BiO2- x composite revealed improved broad spectrum light-responsive molecular oxygen activation into •O2-, especially achieving •O2- generation under NIR light irradiation. The achievement that enhanced broad spectrum light-activated molecular oxygen activation could be ascribed to the faster electron transfer confirmed by the electron spin resonance (ESR) spectra, photoluminescence (PL) spectra, photoelectrochemical test, and quantitative analysis of •O2-. The strong interface effect of the Bi2O4/BiO2- x composite was confirmed by X-ray photoelectron spectroscopy analysis. Density functional theory calculated results suggested that the Bi2O4/BiO2- x composite revealed increased density of states near the Fermi level, suggesting that it possessed higher carrier mobility as compared to Bi2O4 and BiO2- x, contributing to the faster separation of photoinduced carriers and the generation of •O2-. Benefiting to the heterojunction, the Bi2O4/BiO2- x composite showed improved photocatalytic activity and anti-photocorrosion activity during rhodamine B (RhB) and ciprofloxacin (CIP) degradation with the irradiation of UV, visible, and NIR lights. Besides, the possible photocatalytic mechanism and transformation pathway of RhB and CIP degradation by the Bi2O4/BiO2- x composite were proposed by the analyses of the liquid chromatography-mass spectrometry. This study furnishes a new strategy for fabricating high-efficient and broad spectrum light-driven heterojunction photocatalysts for environment purification.
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Affiliation(s)
- Jun Li
- Hubei Key Laboratory of Mineral Resources Processing and Environment, State Key Laboratory of Silicate Materials for Architectures , Wuhan University of Technology , 122 Luoshi Road , Wuhan 430070 , China
| | - Yuan Li
- Hubei Key Laboratory of Mineral Resources Processing and Environment, State Key Laboratory of Silicate Materials for Architectures , Wuhan University of Technology , 122 Luoshi Road , Wuhan 430070 , China
| | - Gaoke Zhang
- Hubei Key Laboratory of Mineral Resources Processing and Environment, State Key Laboratory of Silicate Materials for Architectures , Wuhan University of Technology , 122 Luoshi Road , Wuhan 430070 , China
| | - Hongxia Huang
- Hubei Key Laboratory of Mineral Resources Processing and Environment, State Key Laboratory of Silicate Materials for Architectures , Wuhan University of Technology , 122 Luoshi Road , Wuhan 430070 , China
| | - Xiaoyong Wu
- Hubei Key Laboratory of Mineral Resources Processing and Environment, State Key Laboratory of Silicate Materials for Architectures , Wuhan University of Technology , 122 Luoshi Road , Wuhan 430070 , China
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46
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Wu Y, Wang H, Tu W, Wu S, Chew JW. Construction of hole-transported MoO3-x
coupled with CdS nanospheres for boosting photocatalytic performance via oxygen-defects-mediated Z-scheme charge transfer. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.4780] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Yan Wu
- School of Chemical and Biomedical Engineering; Nanyang Technological University; Singapore 637459 Singapore
| | - Hou Wang
- School of Chemical and Biomedical Engineering; Nanyang Technological University; Singapore 637459 Singapore
| | - Wenguang Tu
- School of Chemical and Biomedical Engineering; Nanyang Technological University; Singapore 637459 Singapore
| | - Shuyang Wu
- School of Chemical and Biomedical Engineering; Nanyang Technological University; Singapore 637459 Singapore
| | - Jia Wei Chew
- School of Chemical and Biomedical Engineering; Nanyang Technological University; Singapore 637459 Singapore
- Singapore Membrane Technology Center, Nanyang Environment and Water Research Institute; Nanyang Technological University; Singapore 639798 Singapore
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47
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Zhao X, Wang X, Zhang J, Yi X. A Z-Scheme Polyimide/AgBr@Ag Aerogel with Excellent Photocatalytic Performance for the Degradation of Oxytetracycline. Chem Asian J 2019; 14:422-430. [PMID: 30537210 DOI: 10.1002/asia.201801561] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 11/23/2018] [Indexed: 02/03/2023]
Abstract
A novel Z-scheme polyimide (PI)/AgBr@Ag aerogel photocatalyst has been successfully synthesized by combining an in situ precipitation method and a supercritical drying method. The as-prepared PI/AgBr@Ag-50 (50 wt % AgBr@Ag in PI/AgBr@Ag) aerogel photocatalyst exhibited excellent photocatalytic activity for oxytetracycline degradation with a rate constant of 0.025 min-1 , which was 6.9 and 2.6 times higher than that of the PI aerogel or the AgBr@Ag nanoparticles, respectively. More significantly, the PI/AgBr@Ag-50 aerogel photocatalyst showed stable cycling, which could be attributed to the high mechanical strength and 3D network of the PI aerogel. The introduction of AgBr@Ag on PI with a heterojunction structure efficiently promoted the separation of electron-hole pairs by a Z-scheme mechanism. The reduced metallic Ag nanoparticles were found to function as centers for the transfer of electrons from AgBr to PI. This work has revealed a new application for the aerogel PI/AgBr@Ag photocatalyst in environmental protection.
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Affiliation(s)
- Xinfu Zhao
- Shandong Provincial Key Laboratory for Special Silicone-Containing Materials, Advanced Materials Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250014, P. R. China
| | - Xinqiang Wang
- State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan, 250100, P. R. China
| | - Jian Zhang
- Department of Chemistry and Chemical Engineering, Jining University, Qufu, 273100, P. R. China
| | - Xibin Yi
- Shandong Provincial Key Laboratory for Special Silicone-Containing Materials, Advanced Materials Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250014, P. R. China
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48
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Zhong Y, Chen W, Yu S, Xie Z, Wei S, Zhou Y. CdSe Quantum Dots/g-C 3N 4 Heterostructure for Efficient H 2 Production under Visible Light Irradiation. ACS OMEGA 2018; 3:17762-17769. [PMID: 31458373 PMCID: PMC6643951 DOI: 10.1021/acsomega.8b02585] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Accepted: 11/29/2018] [Indexed: 05/26/2023]
Abstract
Novel photocatalysts -CdSe quantum dots (QDs)/g-C3N4- were successfully constructed. The structure, chemical composition, and optical properties of the prepared samples were investigated via a series of characterization techniques. The results indicated that CdSe QDs/g-C3N4 photocatalysts exhibited remarkably enhanced photocatalytic activity for visible-light-induced H2 evolution compared to pristine g-C3N4 and CdSe QDs and addition of 13.6 wt % CdSe QDs into the composite photocatalyst generated the highest H2 production rate. The enhanced photocatalytic performance of CdSe QDs/g-C3N4 can be attributed to the synergistic effects of excellent visible absorption and high charge separation efficiency from the heterostructure. This work could not only provide a facile method to fabricate semiconductor QDs-modified g-C3N4 photocatalysts but also contribute to the design for heterostructures.
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Affiliation(s)
- Yunqian Zhong
- The
Center of New Energy Materials and Technology, School of Materials
Science and Engineering, Southwest Petroleum
University, No. 8, Xindu Road, Chengdu 610500, China
| | - Weiwei Chen
- The
Center of New Energy Materials and Technology, School of Materials
Science and Engineering, Southwest Petroleum
University, No. 8, Xindu Road, Chengdu 610500, China
| | - Shan Yu
- The
Center of New Energy Materials and Technology, School of Materials
Science and Engineering, Southwest Petroleum
University, No. 8, Xindu Road, Chengdu 610500, China
| | - Zhanghui Xie
- The
Center of New Energy Materials and Technology, School of Materials
Science and Engineering, Southwest Petroleum
University, No. 8, Xindu Road, Chengdu 610500, China
| | - Shiqian Wei
- The
Center of New Energy Materials and Technology, School of Materials
Science and Engineering, Southwest Petroleum
University, No. 8, Xindu Road, Chengdu 610500, China
| | - Ying Zhou
- State
Key Laboratory of Oil and Gas Reservoir and Exploitation, Southwest Petroleum University, Chengdu 610500, China
- The
Center of New Energy Materials and Technology, School of Materials
Science and Engineering, Southwest Petroleum
University, No. 8, Xindu Road, Chengdu 610500, China
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49
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Fabrication of Bi2WO6 quantum dots/ultrathin nanosheets 0D/2D homojunctions with enhanced photocatalytic activity under visible light irradiation. CHINESE JOURNAL OF CATALYSIS 2018. [DOI: 10.1016/s1872-2067(18)63140-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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50
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Synthesis, Characterization of g-C3N4/SrTiO3 Heterojunctions and Photocatalytic Activity for Organic Pollutants Degradation. Catalysts 2018. [DOI: 10.3390/catal8110554] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Perovskite-structure SrTiO3 (STO) and graphitic carbon nitride (g-C3N4, CN) have attracted considerable attention in photocatalytic technology due to their unique properties, but also suffer from some drawbacks. The development of composite photocatalysts that combine properties of the individual semiconductors with enhanced charge separation is the current major trend in the photocatalysis field. In this study, SrTiO3/g-C3N4 (CNSTO) composites with different ratios (10, 20, 30, 40 and 50% g-C3N4) were prepared with a sonication mixing method. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), N2 porosimetry, Fourrier transform infra-red spectroscopy (FT-IR), UV-Vis diffuse reflectance (DRS) and dynamic light scattering (DLS). STO spherical particles were successfully loaded on the g-C3N4 planes forming heterojunction composite materials. The photocatalytic activity was tested against the degradation of methylene blue (MB) dye under simulated solar light (SSL) irradiation following first-order kinetics. The photocatalytic activity followed the trend: 20CNSTO > 30CNSTO > 40CNSTO > 50CNSTO ≈ 10CNSTO, in accordance with the amount of •OH radicals determined by fluorescence spectroscopy. A Z-scheme mechanism was proposed for the enhanced photocatalytic degradation of MB as evidenced by trapping experiments with scavengers. Finally, significant stability and reusability was exhibited, indicating that such composites are of potential interest for photocatalytic treatments under sunlight irradiation.
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