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Subha N, Nagappagari LR, Ravi Sankar A. A review on recent advances in g-C 3N 4-MXene nanocomposites for photocatalytic applications. NANOTECHNOLOGY 2024; 35:502002. [PMID: 39312902 DOI: 10.1088/1361-6528/ad7e2f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2024] [Accepted: 09/23/2024] [Indexed: 09/25/2024]
Abstract
The solutions for environmental remediation and renewable energy generation have intensified the exploration of efficient photocatalytic materials. Recently, the composites of g-C3N4and MXene have gained considerable interest for their potential applications in photocatalysis. In the g-C3N4-MXene composite, the g-C3N4possesses unique physical, chemical, and optical properties to increase visible light absorption. At the same time, MXene improves conductivity, adsorption of reactant molecules or the active sites, and charge transfer properties. Combining the unique physico-chemical properties of MXene and g-C3N4, the resulting composite exhibits superior photo-responsive behavior and is critical in photocatalytic reactions. Furthermore, the g-C3N4-MXene composite exhibits stability and recyclability, making it a promising candidate for sustainable and scalable photocatalytic material in environmental remediation. This review offers an in-depth analysis of the development and design of g-C3N4-MXene composites through diverse synthesis procedures and a comprehensive analysis of their application in carbon dioxide (CO2) reduction, photocatalytic degradation, water splitting processes, mainly hydrogen (H2) generation, H2O2production, N2fixation, and NOxremoval. The charge transfer mechanism of g-C3N4-MXene composite for photocatalytic application has also been discussed. This review provides insights into the photocatalytic capabilities of g-C3N4-MXene composites, showing their potential to address current environmental challenges and establish a robust foundation for sustainable energy conversion technologies.
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Affiliation(s)
- N Subha
- Centre for Advanced Materials and Innovative Technologies (CAMIT), Vellore Institute of Technology (VIT), Chennai Campus, Chennai, Tamil Nadu, 600127, India
- Department of Chemistry, Vellore Institute of Technology (VIT), Chennai Campus, Chennai 600127, Tamil Nadu, India
| | | | - A Ravi Sankar
- School of Electronics Engineering (SENSE), Vellore Institute of Technology (VIT), Chennai Campus, Chennai 600127, Tamil Nadu, India
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Lu L, He X, Zhu X, Lv C, Liu Z, Pei L, Yan S, Zou Z. Strong Electronic Interaction Enables Enhanced Solar-Driven CO 2 Reduction into Selective CH 4 on SrTiO 3 with Photodeposited Pt 2+ Sites. Inorg Chem 2024; 63:13295-13303. [PMID: 38982625 DOI: 10.1021/acs.inorgchem.4c01053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/11/2024]
Abstract
Targeting selective CO2 photoreduction into CH4 remains a challenge due to the sluggish reaction kinetics and poor hydrogenation ability of the unstable intermediate. Here, the active Pt2+ sites were photodeposited on the SrTiO3 photocatalyst, which was well demonstrated to manipulate the CH4 product selectivity. The results showed that SrTiO3 mainly yielded the CO (6.98 μmol g-1) product with poor CH4 (0.17 μmol g-1). With the Pt2+ modification, 100% CH4 selectivity could be obtained with an optimized yield rate of 8.07 μmol g-1. The prominent enhancement resulted from the following roles: (1) the strong electronic interaction between the Pt2+ cocatalyst and SrTiO3 could prompt efficient separation of the photoelectron-hole pairs. (2) The Pt2+ sites were active to capture and activate inert CO2 into HCO3- and CO32- species and allowed fast *COOH formation with the lowered reaction barrier. (3) Compared with SrTiO3, the formed *CO species could be captured tightly on the Pt2+ cocatalyst surface for generating the *CH2 intermediate by the following electron-proton coupling reaction, thus leading to the CH4 product with 100% selectivity.
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Affiliation(s)
- Lei Lu
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
- Eco-Materials and Renewable Energy Research Center (ERERC), National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
| | - Xiangqing He
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Xiaopeng Zhu
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Changyu Lv
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Zeyu Liu
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Lang Pei
- College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Shicheng Yan
- Eco-Materials and Renewable Energy Research Center (ERERC), National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
| | - Zhigang Zou
- Eco-Materials and Renewable Energy Research Center (ERERC), National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
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Peighambardoust N, Sadigh Akbari S, Lomlu R, Aydemir U, Karadas F. Tunable Photocatalytic Activity of CoFe Prussian Blue Analogue Modified SrTiO 3 Core-Shell Structures for Solar-Driven Water Oxidation. ACS MATERIALS AU 2024; 4:214-223. [PMID: 38496046 PMCID: PMC10941283 DOI: 10.1021/acsmaterialsau.3c00090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 11/21/2023] [Accepted: 11/28/2023] [Indexed: 03/19/2024]
Abstract
This study presents a pioneering semiconductor-catalyst core-shell architecture designed to enhance photocatalytic water oxidation activity significantly. This innovative assembly involves the in situ deposition of CoFe Prussian blue analogue (PBA) particles onto SrTiO3 (STO) and blue SrTiO3 (bSTO) nanocubes, effectively establishing a robust p-n junction, as demonstrated by Mott-Schottky analysis. Of notable significance, the STO/PB core-shell catalyst displayed remarkable photocatalytic performance, achieving an oxygen evolution rate of 129.6 μmol g-1 h-1, with stability over an extended 9-h in the presence of S2O82- as an electron scavenger. Thorough characterization unequivocally verified the precise alignment of the band energies within the STO/PB core-shell assembly. Our research underscores the critical role of tailored semiconductor-catalyst interfaces in advancing the realm of photocatalysis and its broader applications in renewable energy technologies.
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Affiliation(s)
- Naeimeh
Sadat Peighambardoust
- Koç
University Boron and Advanced Materials Application and Research Center
(KUBAM), Sariyer, Istanbul - 34450, Türkiye
| | - Sina Sadigh Akbari
- Department
of Chemistry, Faculty of Science, Bilkent
University, Ankara - 06800, Türkiye
| | - Rana Lomlu
- Department
of Chemistry, Faculty of Science, Bilkent
University, Ankara - 06800, Türkiye
| | - Umut Aydemir
- Koç
University Boron and Advanced Materials Application and Research Center
(KUBAM), Sariyer, Istanbul - 34450, Türkiye
- Department
of Chemistry, Koç University, Sariyer, Istanbul - 34450, Türkiye
| | - Ferdi Karadas
- Department
of Chemistry, Faculty of Science, Bilkent
University, Ankara - 06800, Türkiye
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Effect of CuO Loading on the Photocatalytic Activity of SrTiO3/MWCNTs Nanocomposites for Dye Degradation under Visible Light. INORGANICS 2022. [DOI: 10.3390/inorganics10110211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
In this study, we report on the preparation of copper oxide/strontium titanate/multi-walled carbon nanotube (CuO/STO/MWCNTs) nanocomposites and their photocatalytic activity for degradation of dye under visible light. The crystalline structures of the nanocomposites were investigated by an X-ray diffraction (XRD) technique, which explored the successful fabrication of CuO/STO/MWCNTs nanocomposites, and the cubic STO phase was formed in all samples. For the morphological study, the transmission electron microscope (TEM) technique was used, which had proved the successful preparation of CuO and STO nanoparticles. The energy dispersive X-ray spectroscopy (EDX), dark field scanning transmission electron microscope (DF-STEM-EDX mapping), and X-ray photoelectron spectra (XPS) analysis were performed to evidence the elemental composition of CuO/STO/MWCNTs nanocomposites. The optical characteristics were explored via UV–Vis diffuse reflectance spectroscopy (DRS) and photoluminescence (PL) techniques. These studies clearly indicate the effect of the presence of CuO and MWCNTs on the visible absorption of the CuO/STO/MWCNTs nanocomposites. The photocatalytic activity of CuO/STO/MWCNTs nanocomposites was evaluated by the degradation of methylene blue (MB) dye under visible light irradiation, following first-order kinetics. Among the different x% CuO/STO/MWCNTs nanocomposites, the 5 wt.% CuO/STO/MWCNTs nanocomposites showed the highest photocatalytic efficiency for the degradation of MB dye. Moreover, the 5% CuO/STO/MWCNTs showed good stability and recyclability after three consecutive photocatalytic cycles. These results verified that the optimized nanocomposites can be used for photocatalytic applications, especially for dye degradation under visible light.
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Effect of CuO Loading on the Photocatalytic Activity of SrTiO3 for Hydrogen Evolution. INORGANICS 2022. [DOI: 10.3390/inorganics10090130] [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
A CuO-loaded SrTiO3 catalyst showed highly photocatalytic activity for H2 evolution. This catalyst was prepared by an impregnation method and characterized by XRD, TEM, BET, XPS, Uv-vis DRS and PL techniques. Under optimum conditions, the best rate of H2 evolution of the CuO-loaded SrTiO3 catalyst is 5811 µmol h−1g−1, whereas it is a mere 34 µmol h−1g−1 for the pure SrTiO3. High efficiency, low cost and good stability are some of the merits that underline the promising potential of CuO-loaded SrTiO3 in the photocatalytic hydrogen.
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Zehtab-Lotfi E, Amani-Ghadim AR, Soltani B. Visible light-driven photocatalytic activity of wide band gap ATiO 3 (A = Sr, Zn and Cd) perovskites by lanthanide doping and the formation of a mesoporous heterostructure with ZnS QDs. Dalton Trans 2022; 51:12198-12212. [PMID: 35894544 DOI: 10.1039/d2dt01751b] [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
Charge carrier recombination and wide band gap energy are still the main challenges in the visible-light-driven photocatalytic applications of titanate perovskites, ATiO3. Herein, three strategies are rationally used to achieve a titanate-based photocatalyst with high photocatalytic performance under visible light. In the first step, SrTiO3, ZnTiO3, and CdTiO3 perovskites were synthesized and their photocatalytic activity was evaluated in the degradation of methylene blue (MB) and bisphenol A (BPA). Then, a dysprosium cation (Dy3+) was doped into an ATiO3 crystalline lattice. Systematic investigations indicate that Dy doping in SrTiO3 and CdTiO3 extends the ligand to metal charge transfer absorption edge to visible wavelengths leading to the activation of doped perovskites under visible light. Higher visible-light-driven photocatalytic performance (73.29% for MB and 52.57% for BPA) and higher total organic carbon (TOC) removal (59.20% for MB and 39.53% for BPA) have been achieved by Dy doped CdTiO3 compared to other photocatalysts. Finally, we prepared a Dy-CdTP/ZnS QD mesoporous type-II heterostructure by the in situ growth of ZnS QDs on a flower-like Dy-CdTP. This design accelerates the separation and transfer of photogenerated electron-hole pairs. The surface area of the Dy-CdTP/ZnS QD heterostructure was ∼11.6 times greater than that of Dy-CdTP, offering a large surface area for the adsorption of organics, and abundant active sites for photocatalytic degradation. Taking advantage of the large surface area and considerable suppressing of the charge carrier recombination, the optimized Dy-CdTP(0.6)/ZnS QD photocatalyst exhibits excellent and stable performance for the degradation of MB (98.25%) and BPA (89.12%) with their considerable mineralization under visible light.
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Affiliation(s)
- Elnaz Zehtab-Lotfi
- Department of Chemistry, Faculty of Science, Azarbaijan Shahid Madani University (ASMU), Tabriz 53751-71379, Iran
| | - Ali Reza Amani-Ghadim
- Applied Chemistry Research laboratory, Department of Chemistry, Faculty of Basic Science, Azarbaijan Shahid Madani University (ASMU), Tabriz 53751-71379, Iran. .,New Technologies in the Environment Research Center, Azarbaijan Shahid Madani University (ASMU), Tabriz 53751-71379, Iran
| | - Behzad Soltani
- Department of Chemistry, Faculty of Science, Azarbaijan Shahid Madani University (ASMU), Tabriz 53751-71379, Iran
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Zhang Y, Li Y, Ruan Z, Yuan Y, Lin K. Extensive solar light utilizing by ternary C-dots/Cu 2O/SrTiO 3: Highly enhanced photocatalytic degradation of antibiotics and inactivation of E. coli. CHEMOSPHERE 2022; 290:133340. [PMID: 34922957 DOI: 10.1016/j.chemosphere.2021.133340] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 12/07/2021] [Accepted: 12/15/2021] [Indexed: 06/14/2023]
Abstract
Fabrication of a visible-light driven photocatalyst is of great vital for the elimination of antibiotics and microorganism in the wastewater and the construction of sustainable green energy systems. In this work, carbon quantum dots (C-dots) were integrated with Cu2O/SrTiO3 p-n heterojunction to optimize the photocatalytic activity. The excellent photocatalytic degradation efficiency of chlortetracycline hydrochloride (CTC·HCl) (92.6% within 90 min) and E. coli inactivation efficiency were observed over C-dots/Cu2O/SrTiO3 under visible light irradiation. It is the synergistic effect of p-n heterojunction and modification of C-dots that facilitates the separation and transfer of electron-holes. Meanwhile, the modification of C-dots improves the harvesting of long wavelength solar light of photocatalysts due to its unique up-conversion photoluminescence (UCPL) characteristics. Eventually, the possible photocatalytic degradation path of the catalyst was inferred by LC-MS spectra, and the degradation mechanism was analyzed. This study sheds light on new possibilities for the application of photocatalysts in various light sources and has broad application prospects in water treatment.
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Affiliation(s)
- Yuanyuan Zhang
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Yue Li
- Micro/Nanotechnology Research Centre, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Zhaohui Ruan
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Yuan Yuan
- School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China.
| | - Kaifeng Lin
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China.
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