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Wu B, Wang C, Wang Z, Shen K, Wang K, Li G. Coupling Z-Scheme g-C 3N 4/rGO/MoS 2 Ternary Heterojunction as an Efficient Visible Light Photocatalyst for Hydrogen Evolution and RhB Degradation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:1931-1940. [PMID: 38214273 DOI: 10.1021/acs.langmuir.3c03685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2024]
Abstract
Coupling heterostructures to synergistically improve the light adsorption and promote the charge carrier separation has been regarded as an operative approach to advance the photocatalytic performances. However, it is still challenging to construct heterostructures with appropriate optical properties and interfacial energy structures at the same time. In this work, a Z-scheme g-C3N4/rGO/MoS2 ternary composite photocatalyst is successfully synthesized via an effective hydrothermal method. The as-synthesized g-C3N4/rGO/MoS2 composite photocatalyst exhibited significant improvement for visible light absorption and boosted the separation efficiency of photoinduced electron-hole pairs. The g-C3N4/rGO/MoS2 system exhibited optimum visible-light-induced photocatalytic activity in hydrogen (H2) from water splitting and degrading pollutant rhodamin B (RhB), which is 22 times and 5 times higher than that of pure g-C3N4, respectively. The excellent photocatalytic activities are attributed to the synergetic effects of coupling rGO, g-C3N4, and MoS2 ternary structures to the composite photocatalyst. These combinations of intimate two-dimensional nanoconjugations can effectively inhibit charge recombination and accelerate charge transfer kinetics, forming a Z-scheme-assisted photocatalytic mechanism, thereby exhibiting superior photocatalytic activity.
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Affiliation(s)
- Bo Wu
- Institute of Energy Innovation, Taiyuan University of Technology, Taiyuan 030024, China
| | - Congwei Wang
- CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
| | - Zheyan Wang
- Institute of Energy Innovation, Taiyuan University of Technology, Taiyuan 030024, China
| | - Kai Shen
- Institute of Energy Innovation, Taiyuan University of Technology, Taiyuan 030024, China
| | - Kaiying Wang
- Institute of Energy Innovation, Taiyuan University of Technology, Taiyuan 030024, China
- Department of Microsystems, University of South-Eastern Norway, Horten, 3184, Norway
| | - Gang Li
- Institute of Energy Innovation, Taiyuan University of Technology, Taiyuan 030024, China
- College of Physics and Information Engineering, Minnan Normal University, Zhangzhou 361000, China
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2
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Teja YN, Sakar M. Comprehensive Insights into the Family of Atomically Thin 2D-Materials for Diverse Photocatalytic Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2303980. [PMID: 37461252 DOI: 10.1002/smll.202303980] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 07/05/2023] [Indexed: 11/16/2023]
Abstract
2D materials with their fascinating physiochemical, structural, and electronic properties have attracted researchers and have been used for a variety of applications such as electrocatalysis, photocatalysis, energy storage, magnetoresistance, and sensing. In recent times, 2D materials have gained great momentum in the spectrum of photocatalytic applications such as pollutant degradation, water splitting, CO2 reduction, NH3 production, microbial disinfection, and heavy metal reduction, thanks to their superior properties including visible light responsive band gap, improved charge separation and electron mobility, suppressed charge recombination and high surface reactive sites, and thus enhance the photocatalytic properties rationally as compared to 3D and other low-dimensional materials. In this context, this review spot-lights the family of various 2D materials, their properties and their 2D structure-induced photocatalytic mechanisms while giving an overview on their synthesis methods along with a detailed discussion on their diverse photocatalytic applications. Furthermore, the challenges and the future opportunities are also presented related to the future developments and advancements of 2D materials for the large-scale real-time photocatalytic applications.
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Affiliation(s)
- Y N Teja
- Centre for Nano and Material Sciences, Jain (Deemed to be) University, Jain Global Campus, Kanakapura, Bangalore, Karnataka, 562112, India
| | - Mohan Sakar
- Centre for Nano and Material Sciences, Jain (Deemed to be) University, Jain Global Campus, Kanakapura, Bangalore, Karnataka, 562112, India
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3
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Kisała J, Wojnarowska-Nowak R, Bobitski Y. Layered MoS 2: effective and environment-friendly nanomaterial for photocatalytic degradation of methylene blue. Sci Rep 2023; 13:14148. [PMID: 37644130 PMCID: PMC10465577 DOI: 10.1038/s41598-023-41279-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 08/24/2023] [Indexed: 08/31/2023] Open
Abstract
Photocatalytic degradation is a promising method for removing persistent organic pollutants from water because of its low cost (see solar-driven photocatalysis), high mineralisation of pollutants, and low environmental impact. Photocatalysts based on transition metal dichalcogenides (TMDs) have recently attracting high scientific interest due to their unique electrical, mechanical, and optical properties. A MoS2 photocatalyst of the layered structure was managed to photodegrade methylene blue (MB) under visible light irradiation. The catalyst was thoroughly characterised using SEM, AFM, powder XRD, UV-Vis, Raman, and XPS measurements. The photocatalytic degradation of the MB solution was conducted under the following conditions: (i) reductive and (ii) oxidative. The impact of optical and electronic properties, and the MoS2-MB interaction on photocatalytic activity, was discussed. The apparent rate constants (kapp) of degradation were 3.7 × 10-3; 7.7 × 10-3; 81.7 × 10-3 min-1 for photolysis, oxidative photocatalysis, and reductive photocatalysis. Comparison of the degradation efficiency of MB in reductive and oxidative processes indicates the important role of the reaction with the surface electron. In the oxidation process, oxygen reacts with an electron to form a superoxide anion radical involved in further transformations of the dye, whereas, in the reduction process, the addition of an electron destabilises the chromophore ring and leads to its rupture.
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Affiliation(s)
- Joanna Kisała
- Institute of Biology, University of Rzeszow, Pigonia 1 Str., 35-310, Rzeszow, Poland.
| | - Renata Wojnarowska-Nowak
- Institute of Materials Science, College of Natural Sciences, University of Rzeszow, Pigonia 1 Str., 35-959, Rzeszow, Poland
| | - Yaroslav Bobitski
- Centre for Microelectronics and Nanotechnology, Institute of Physics, University of Rzeszow, Pigonia 1, 35-959, Rzeszow, Poland
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Alageshwaramoorthy K, Mannu P, Mahalingam S, Nga TTT, Chang HW, Masuda Y, Dong CL. Synthesis and characterization of visible-light-driven novel CuTa 2O 6 as a promising practical photocatalyst. Front Chem 2023; 11:1197961. [PMID: 37426335 PMCID: PMC10323133 DOI: 10.3389/fchem.2023.1197961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 06/12/2023] [Indexed: 07/11/2023] Open
Abstract
In this work, the novel CuTa2O6 phase was successfully synthesized by the hydrothermal and followed by the calcination process. The X-ray diffraction pattern confirms the formation of different phases. At a low temperature, CuTa2O6 exhibits the orthorhombic phase, whereas, at a higher temperature, it underwent a phase transition to a cubic crystal structure. X-ray photoelectron spectroscopic results suggest the presence of all the elements (Cu, Ta, and O). The optical studies were carried out using a UV-Vis DRS spectrophotometer. FESEM images confirm the spherical-shaped particles for the sample annealed at a high temperature. The local atomic and electronic structures around Cu and the contribution of the Cu oxidation state in the CuTa2O6 system were determined by X-ray absorption spectroscopy. To investigate the effective usage of CuTa2O6 in treating wastewater, its photocatalytic activity was investigated by evaluating its use in the photodegradation of MO dye under visible light irradiation. Moreover, the prepared CuTa2O6 photocatalyst exhibits significant photocatalytic activity in the degradation of MO dye and shows excellent stability; it is therefore a promising material for potential use in a practical photocatalyst. The CuTa2O6 photocatalyst suggests an alternative avenue of research into effective photo-catalysts for solar hydrogen water splitting.
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Affiliation(s)
| | - Pandian Mannu
- Research Center for X-ray Science and Department of Physics, Tamkang University, Tamsui, Taiwan
| | - Seetha Mahalingam
- Department of Physics, Kongunadu Arts and Science College, Coimbatore, India
| | - Ta Thi Thuy Nga
- Research Center for X-ray Science and Department of Physics, Tamkang University, Tamsui, Taiwan
| | - Han-Wei Chang
- Department of Chemical Engineering, National United University, Miaoli, Taiwan
- Pesticide Analysis Center, National United University, Miaoli, Taiwan
| | - Yoshitake Masuda
- National Institute of Advanced Industrial Science and Technology (AIST), Nagoya, Japan
| | - Chung-Li Dong
- Research Center for X-ray Science and Department of Physics, Tamkang University, Tamsui, Taiwan
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Sahoo D, Tyagi S, Agarwal S, Shakya J, Ali N, Yoo WJ, Kaviraj B. Cost-Effective and Highly Efficient Manganese-Doped MoS 2 Nanosheets as Visible-Light-Driven Photocatalysts for Wastewater Treatment. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:7109-7121. [PMID: 37156095 DOI: 10.1021/acs.langmuir.3c00390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
One of the main objectives in wastewater treatment and sustainable energy production is to find photocatalysts that are favorably efficient and cost-effective. Transition-metal dichalcogenides (TMDs) are promising photocatalytic materials; out of all, MoS2 is extensively studied as a cocatalyst in the TMD library due to its exceptional photocatalytic activity for the degradation of organic dyes due to its distinctive morphology, adequate optical absorption, and rich active sites. However, sulfur ions on the active edges facilitate the catalytic activity of MoS2. On the basal planes, sulfur ions are catalytically inactive. Injecting metal atoms into the MoS2 lattice is a handy approach for triggering the surface of the basal planes and enriching catalytically active sites. Effective band gap engineering, sulfur edges, and improved optical absorption of Mn-doped MoS2 nanostructures are promising for improving their charge separation and photostimulated dye degradation activity. The percentage of dye degradation of MB under visible-light irradiations was found to be 89.87 and 100% for pristine and 20% Mn-doped MoS2 in 150 and 90 min, respectively. However, the degradation of MB dye was increased when the doping concentration in MoS2 increased from 5 to 20%. The kinetic study showed that the first-order kinetic model described the photodegradation mechanism well. After four cycles, the 20% Mn-doped MoS2 catalysts maintained comparable catalytic efficacy, indicating its excellent stability. The results demonstrated that the Mn-doped MoS2 nanostructures exhibit exceptional visible-light-driven photocatalytic activity and could perform well as a catalyst for industrial wastewater treatment.
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Affiliation(s)
- Dhirendra Sahoo
- Department of Physics, School of Natural Sciences, Shiv Nadar Institution of Eminence, NH-91, Greater Noida, Gautam Budha Nagar, Uttar Pradesh 201314, India
| | - Shivam Tyagi
- Department of Physics, School of Natural Sciences, Shiv Nadar Institution of Eminence, NH-91, Greater Noida, Gautam Budha Nagar, Uttar Pradesh 201314, India
| | - Srishti Agarwal
- Department of Physics, School of Natural Sciences, Shiv Nadar Institution of Eminence, NH-91, Greater Noida, Gautam Budha Nagar, Uttar Pradesh 201314, India
| | - Jyoti Shakya
- Department of Fiber and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, 10044 Stockholm, Sweden
| | - Nasir Ali
- SKKU Advanced Institute of Nano-Technology (SAINT), Sungkyunkwan University 2066, Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Korea
| | - Won Jong Yoo
- SKKU Advanced Institute of Nano-Technology (SAINT), Sungkyunkwan University 2066, Seobu-ro, Jangan-gu, Suwon, Gyeonggi-do 16419, Korea
| | - Bhaskar Kaviraj
- Department of Physics, School of Natural Sciences, Shiv Nadar Institution of Eminence, NH-91, Greater Noida, Gautam Budha Nagar, Uttar Pradesh 201314, India
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Zhang J, Ma J, Sun X, Yi Z, Xian T, Wu X, Liu G, Wang X, Yang H. Construction of Z-Scheme Ag 2MoO 4/ZnWO 4 Heterojunctions for Photocatalytically Removing Pollutants. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:1159-1172. [PMID: 36628490 DOI: 10.1021/acs.langmuir.2c02939] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Facilitation of the photocarrier separation is a crucial strategy for developing highly efficient photocatalysts in eliminating environmental pollutants. Herein we have developed a new kind of Ag2MoO4/ZnWO4 (AMO/ZWO) composite photocatalysts with a Z-scheme mechanism by anchoring AMO nanoparticles onto ZWO nanorods. Multiple characterization methodologies and density functional theory (DFT) calculations were employed to study the performances of the AMO/ZWO heterojunctions as well as the underlying photocatalytic mechanism. Simulated-sunlight-driven photodegradation experiments for removing methylene blue (MB) demonstrates that the 8%AMO/ZWO heterojunction can photocatalytically remove 99.8% of MB within 60 min, and the reaction rate constant is obtained as 0.10199 min-1, which is enhanced by 6.8 (or 4.9) times when compared with that of pure ZWO (or AMO). On the base of the experimental results and DFT calculations, the enhanced photocatalytic mechanism of the AMO/ZWO heterojunctions was revealed to be the efficient separation of photocarriers via a Z-scheme transfer process. In addition, photodegradion of various organic pollutants over 8%AMO/ZWO was further compared and aimed at incorporating it into industrial application in pollutant removal.
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Affiliation(s)
| | | | | | - Zao Yi
- Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang621010, China
| | - Tao Xian
- College of Physics and Electronic Information Engineering, Qinghai Normal University, Xining810008, China
| | - Xianwen Wu
- School of Chemistry and Chemical Engineering, Jishou University, Jishou416000, China
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7
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Effect of sulfur precursors on hydrothermal growth of MoS2 nanostructures and its visible-light-driven photocatalytic activities. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.134929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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8
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Sahoo D, Shakya J, Choudhury S, Roy SS, Devi L, Singh B, Ghosh S, Kaviraj B. High-Performance MnO 2 Nanowire/MoS 2 Nanosheet Composite for a Symmetrical Solid-State Supercapacitor. ACS OMEGA 2022; 7:16895-16905. [PMID: 35647444 PMCID: PMC9134226 DOI: 10.1021/acsomega.1c06852] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2021] [Accepted: 04/28/2022] [Indexed: 05/03/2023]
Abstract
To improve the production rate of MoS2 nanosheets as an excellent supercapacitor (SC) material and enhance the performance of the MoS2-based solid-state SC, a liquid phase exfoliation method is used to prepare MoS2 nanosheets on a large scale. Then, the MnO2 nanowire sample is synthesized by a one-step hydrothermal method to make a composite with the as-synthesized MoS2 nanosheets to achieve a better performance of the solid-state SC. The interaction between the MoS2 nanosheets and MnO2 nanowires produces a synergistic effect, resulting in a decent energy storage performance. For practical applications, all-solid-state SC devices are fabricated with different molar ratios of MoS2 nanosheets and MnO2 nanowires. From the experimental results, it can be seen that the synthesized nanocomposite with a 1:4 M ratio of MoS2 nanosheets and MnO2 nanowires exhibits a high Brunauer-Emmett-Teller surface area (∼118 m2/g), optimum pore size distribution, a specific capacitance value of 212 F/g at 0.8 A/g, an energy density of 29.5 W h/kg, and a power density of 1316 W/kg. Besides, cyclic charging-discharging and retention tests manifest significant cycling stability with 84.1% capacitive retention after completing 5000 rapid charge-discharge cycles. It is believed that this unique, symmetric, lightweight, solid-state SC device may help accomplish a scalable approach toward powering forthcoming portable energy storage applications.
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Affiliation(s)
- Dhirendra Sahoo
- Department
of Physics, School of Natural Sciences, Shiv Nadar University, NH-91, Greater Noida, Gautam Budha Nagar, Uttar Pradesh 201314, India
| | - Jyoti Shakya
- Department
of Physics, Indian Institute of Science Bangalore 560012, India
| | - Sudipta Choudhury
- Department
of Physics, School of Natural Sciences, Shiv Nadar University, NH-91, Greater Noida, Gautam Budha Nagar, Uttar Pradesh 201314, India
| | - Susanta Sinha Roy
- Department
of Physics, School of Natural Sciences, Shiv Nadar University, NH-91, Greater Noida, Gautam Budha Nagar, Uttar Pradesh 201314, India
| | - Lalita Devi
- School
of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Budhi Singh
- School
of Mechanical Engineering, Sungkyunkwan
University, Suwon 03063, South Korea
| | - Subhasis Ghosh
- School
of Physical Sciences, Jawaharlal Nehru University, New Delhi 110067, India
| | - Bhaskar Kaviraj
- Department
of Physics, School of Natural Sciences, Shiv Nadar University, NH-91, Greater Noida, Gautam Budha Nagar, Uttar Pradesh 201314, India
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Wang J, Yin D, Guo X, Luo Z, Tao L, Ren J, Zhang Y. Fabrication of a Covalent Organic Framework-Based Heterojunction via Coupling with ZnAgInS Nanosphere with High Photocatalytic Activity. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:4680-4691. [PMID: 35394281 DOI: 10.1021/acs.langmuir.2c00203] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Covalent organic frameworks (COFs) exhibit visible-light activity for the degradation of organic pollutants. However, the recombination rates of their photoinduced electron-hole pairs are relatively high, limiting their practical application. In this work, we fabricated a 1,3,5-triformylphloroglucinol (Tp) and p-phenylenediamine (Pa-1) (TpPa-1) COF-based heterojunction through coupling the TpPa-1 COF with a ZnAgInS nanosphere via a facile oil bath heating method. The results show that the prepared heterojunction exhibits outstanding catalytic activity for the degradation of high concentrations the antibiotic tetracycline (TC) and the dye rhodamine B (RhB), which is driven by simulated sunlight. Its degradation rates for RhB and TC were 30× and 18× higher than that of the pure TpPa-1 COF, respectively. The greatly enhanced photocatalytic performances can be ascribed to the formed heterojunction with good band-gap match, which promotes the migration and separation of light-induced electrons and holes and increases both light absorbance and the specific surface area. This study introduces an effective and feasible strategy for improving the photocatalytic performances of COFs via subtly integrating TpPa-1 COFs with a ZnAgInS nanosphere into an organic-inorganic hybrid. The results of the photocatalytic experiments indicate that the fabricated hybrid has a potential application in the highly efficient removal of organic pollutants.
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Affiliation(s)
- Jun Wang
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
| | - Dongguang Yin
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
| | - Xiandi Guo
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
| | - Zhaoyue Luo
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
| | - Liyue Tao
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
| | - Junjie Ren
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
| | - Yong Zhang
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
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