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Yi S, Li Y, Sun Z, Li S, Gao L. Z-Scheme ZnV 2O 4/g-C 3N 4 Heterojunction Catalyst Produced by the One-Pot Method for the Degradation of Tetracycline under Visible Light. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c03604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Siyuan Yi
- College of Environmental Science and Engineering, Taiyuan University of Technology, 79 Yingze Street, Wanbailin District, Taiyuan030024, China
| | - Yuzhen Li
- College of Environmental Science and Engineering, Taiyuan University of Technology, 79 Yingze Street, Wanbailin District, Taiyuan030024, China
| | - Zhaoxin Sun
- College of Environmental Science and Engineering, Taiyuan University of Technology, 79 Yingze Street, Wanbailin District, Taiyuan030024, China
| | - Shuo Li
- College of Environmental Science and Engineering, Taiyuan University of Technology, 79 Yingze Street, Wanbailin District, Taiyuan030024, China
| | - Lizhen Gao
- College of Environmental Science and Engineering, Taiyuan University of Technology, 79 Yingze Street, Wanbailin District, Taiyuan030024, China
- School of Mechanical Engineering, University of Western Australia, 35 Stirling Highway, Crawley, WA6009, Australia
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Ahmad N, Kuo CFJ, Mustaqeem M. Synthesis of novel CuNb 2O 6/g-C 3N 4 binary photocatalyst towards efficient visible light reduction of Cr (VI) and dyes degradation for environmental remediation. CHEMOSPHERE 2022; 298:134153. [PMID: 35283153 DOI: 10.1016/j.chemosphere.2022.134153] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Revised: 02/14/2022] [Accepted: 02/25/2022] [Indexed: 06/14/2023]
Abstract
The further development of an efficient and sustainable water treatment requires the development of a very active and controllable photocatalyst. The heterojunction is a promising site where the activity of such a photocatalyst can be enhanced. Organic dyes have become a severe concern in recent years owing to their significant presence in wastewater. Hexavalent Chromium (Cr (VI)) is a potential carcinogen also exhibiting great persistence in wastewater. So, a low-waste, high-performance materials is required to eliminate organic dyes and Cr (VI) from wastewater. In this study, CNO/g-CN (CuNb2O6/g-C3N4) photocatalyst synthesized via co-precipitation, followed by calcination which were characterized using physiochemical and photo-electrochemical approaches to identify their structural, photochemical and optical traits. The uniqueness of the synthesized photocatalyst is due to both its efficient photo-reduction of Cr (VI) and photo-degradation of Rhodamine B (RhB), Methylene Blue (MB) and Methyl Orange (MO) under visible light. The CNO/g-CN composite with 30% CNO heterojunctions exhibited the highest photocatalytic activity with Cr (VI) 92.80% photoreduction and efficiency degradation for RhB, MB, MO of 99.6%, 98.50%, 99.0%, respectively, with constant rate (k). This efficient photocatalytic activity is attributed to the lower recombination rate of electron-hole pairs. Free radical trapping experiments showed that •O2- and h+ play an important role in the photodegradation. The study, therefore, opens an alternative route in the synthesis of very efficient binary photocatalysts for application in environmental remediation.
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Affiliation(s)
- Naveed Ahmad
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, 10607, Taiwan, ROC
| | - Chung-Feng Jeffrey Kuo
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei, 10607, Taiwan, ROC.
| | - Mujahid Mustaqeem
- Department of Chemistry, National Taiwan University, Taipei, 10617, Taiwan, ROC
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3
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Precursor-reforming strategy induced g-C3N4 microtubes with spatial anisotropic charge separation established by conquering hydrogen bond for enhanced photocatalytic H2-production performance. J Colloid Interface Sci 2019; 547:224-233. [DOI: 10.1016/j.jcis.2019.03.106] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 03/29/2019] [Accepted: 03/30/2019] [Indexed: 11/20/2022]
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4
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Chen Y, Li W, Jiang D, Men K, Li Z, Li L, Sun S, Li J, Huang ZH, Wang LN. Facile synthesis of bimodal macroporous g-C 3N 4/SnO 2 nanohybrids with enhanced photocatalytic activity. Sci Bull (Beijing) 2019; 64:44-53. [PMID: 36659522 DOI: 10.1016/j.scib.2018.12.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Revised: 11/26/2018] [Accepted: 12/09/2018] [Indexed: 01/21/2023]
Abstract
It is of vital importance to construct highly interconnected, macroporous photocatalyst to improve its efficiency and applicability in solar energy conversion and environment remediation. Graphitic-like C3N4 (g-C3N4), as an analogy to two-dimensional (2D) graphene, is highly identified as a visible-light-responsive polymeric semiconductor. Moreover, the feasibility of g-C3N4 in making porous structures has been well established. However, the preparation of macroporous g-C3N4 with abundant porous networks and exposure surface, still constitutes a difficulty. To solve it, we report a first facile preparation of bimodal macroporous g-C3N4 hybrids with abundant in-plane holes, which is simply enabled by in-situ modification through thermally treating the mixture of thiourea and SnCl4 (pore modifier) after rotary evaporation. For one hand, the formed in-plane macropores endow the g-C3N4 system with plentiful active sites and short, cross-plane diffusion channels that can greatly speed up mass transport and transfer. For another, the heterojunctions founded between g-C3N4 and SnO2 consolidate the electron transfer reaction to greatly reduce the recombination probability. As a consequence, the resulted macroporous g-C3N4/SnO2 nanohybrid had a high specific surface area (SSA) of 44.3 m2/g that was quite comparable to most nano/mesoporous g-C3N4 reported. The interconnected porous network also rendered a highly intensified light absorption by strengthening the light penetration. Together with the improved mass transport and electron transfer, the macroporous g-C3N4/SnO2 hybrid exhibited about 2.4-fold increment in the photoactivity compared with pure g-C3N4. Additionally, the recyclability of such hybrid could be guaranteed after eight successive uses.
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Affiliation(s)
- Yingzhi Chen
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Wenhao Li
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Dongjian Jiang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Kuo Men
- State Key Laboratory of Advanced Materials for Smart Sensing, General Research Institute for Non-Ferrous Metals, Beijing 101407, China
| | - Zhen Li
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Ling Li
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Shizheng Sun
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Jingyuan Li
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Zheng-Hong Huang
- Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
| | - Lu-Ning Wang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China; State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China.
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5
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Patil B, Park C, Ahn H. Scalable nanohybrids of graphitic carbon nitride and layered NiCo hydroxide for high supercapacitive performance. RSC Adv 2019; 9:33643-33652. [PMID: 35528870 PMCID: PMC9073531 DOI: 10.1039/c9ra06068e] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 10/10/2019] [Indexed: 12/14/2022] Open
Abstract
The limited number of edge nitrogen atoms and low intrinsic electrical conductivity hinder the supercapacitive energy storage applications of the nitrogen-rich graphitic carbon nitride (g-C3N4). In this study, a novel graphitic carbon nitride/NiCo-layered double hydroxide (CNLDH), a two-dimensional nanohybrid, is prepared by a simple hydrothermal synthesis. The homogeneous interpolation of g-C3N4 nanosheets into NiCo LDH stacked nanosheets effectively increases the overall performances of the g-C3N4/NiCo LDH nanohybrid. The improved morphology of the nanohybrid electrode upon the addition of g-C3N4 to the NiCo LDH yields a specific capacity of 183.43 mA h g−1 in 6 M KOH at 1 A g−1, higher than those of bare g-C3N4 (20.89 mA h g−1) and NiCo LDH (95.92 mA h g−1) electrodes. The excellent supercapacitive performance of the CNLDH nanohybrid is complemented by its low internal resistance, excellent rate capability, and large cycling lifetime. Furthermore, the hybrid supercapacitor is assembled using CNLDH 0.1 as a positive electrode and activated carbon (AC) as a negative electrode. The hybrid supercapacitor device of CNLDH 0.1//AC shows the maximum specific capacity of 37.44 mA h g−1 at 1 A g−1 with remarkable energy density, power density and good cycling performance. This confirms that the CNLDH 0.1 nanohybrid is an excellent electrode material for supercapacitor applications. A two dimensional CNLDH 0.1 nanohybrid supercapacitor electrode prepared by simple hydrothermal hybridization of g-C3N4 and NiCO LDH shows the maximum specific capacity of 183.43 mA h g−1 with remarkable electrochemical performance.![]()
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Affiliation(s)
- Bebi Patil
- Institute of Nano Science and Technology
- Hanyang University
- Seoul 04763
- South Korea
| | - Changyong Park
- Department of Organic and Nano Engineering
- Hanyang University
- Seoul 04763
- South Korea
| | - Heejoon Ahn
- Institute of Nano Science and Technology
- Hanyang University
- Seoul 04763
- South Korea
- Department of Organic and Nano Engineering
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Cao Y, Jing X, Chen Y, Kang W, Wang S, Wang W. Template-free synthesis of salmon pink tube-shaped structure carbon nitride with enhanced visible light photocatalytic activity. RSC Adv 2019; 9:3396-3402. [PMID: 35518949 PMCID: PMC9060291 DOI: 10.1039/c8ra09950b] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 01/02/2019] [Indexed: 11/23/2022] Open
Abstract
Designing a highly active and stable photocatalyst to directly solve environmental pollution is desirable for solar energy conversion. Herein, an effective strategy, hydrothermal-calcination, for synthesizing extremely active carbon nitride (salmon pink) from a low-cost precursor melamine, is reported. The salmon pink carbon nitride with tube-shaped structure significantly enhanced response to visible light, improved efficiency of charge separation and remarkably enhanced efficiency of methyl orange (MO) degradation than bulk g-C3N4 (light orange). The M-10-200-24-600 composite possessed the most wonderful ability towards MO degradation irradiated by visible light, which could achieve a highest degradation efficiency of 84% within 120 min. Our findings may provide a promising and facile approach to highly efficient photocatalysis for solar-energy conversion. Designing a highly active and stable photocatalyst to directly solve environmental pollution is desirable for solar energy conversion.![]()
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Affiliation(s)
- Youzhi Cao
- School of Chemistry and Chemical Engineering
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan
- Shihezi University
- Shihezi 832003
- China
| | - Xinbo Jing
- School of Chemistry and Chemical Engineering
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan
- Shihezi University
- Shihezi 832003
- China
| | - Yajuan Chen
- School of Chemistry and Chemical Engineering
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan
- Shihezi University
- Shihezi 832003
- China
| | - Wenjie Kang
- School of Chemistry and Chemical Engineering
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan
- Shihezi University
- Shihezi 832003
- China
| | - Shufen Wang
- College of Sciences
- Shihezi University
- Shihezi 832003
- China
| | - Wei Wang
- School of Chemistry and Chemical Engineering
- Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan
- Shihezi University
- Shihezi 832003
- China
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7
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A Metal-Free Carbon-Based Catalyst: An Overview and Directions for Future Research. C — JOURNAL OF CARBON RESEARCH 2018. [DOI: 10.3390/c4040054] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Metal-free carbon porous materials (CPMs) have gained the intensive attention of scientists and technologists because of their potential applications, ranging from catalysis to energy storage. Various simple and facile strategies are proposed for the preparation of CPMs with well-controlled sizes, shapes, and modifications on the surface. The extraordinary tenability of the pore structure, the environmental acceptability, the unique surface and the corrosion resistance properties allow them to be suitable materials for a large panel of catalysis applications. This review briefly outlines the different signs of progresses made towards synthesizing CPMs, and their properties, including catalytic efficiency, stability, and recyclability. Finally, we make a comparison of their catalytic performances with other nanocomposites, and we provide an outlook on the expected developments in the relevant research works.
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