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From urea to melamine cyanurate: Study of a class of thermal condensation routes for the preparation of graphitic carbon nitride. J SOLID STATE CHEM 2022. [DOI: 10.1016/j.jssc.2022.123071] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Sierra M, Borges E, Esparza P, Méndez-Ramos J, Martín-Gil J, Martín-Ramos P. Photocatalytic activities of coke carbon/g-C 3N 4 and Bi metal/Bi mixed oxides/g-C 3N 4 nanohybrids for the degradation of pollutants in wastewater. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2016; 17:659-668. [PMID: 27877912 PMCID: PMC5102004 DOI: 10.1080/14686996.2016.1235962] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 09/07/2016] [Accepted: 09/09/2016] [Indexed: 05/24/2023]
Abstract
Different g-C3N4 composite systems (coke carbon/g-C3N4, Bi/Bi2WO6/g-C3N4 and Bi/Bi2MoO6/g-C3N4) have been assessed as photocatalysts for wastewater pollutants removal. The coke carbon/g-C3N4 hybrid, produced by thermal treatment at 550 °C of a composite made from melamine cyanurate and coke, only showed activity under UV-light irradiation. On the other hand, inorganic Bi spheres/Bi mixed oxides/g-C3N4 nanohybrids (Bi/Bi2WO6/g-C3N4 and Bi/Bi2MoO6/g-C3N4 composites), produced by thermal reduction of Bi2WO6 or Bi2MoO6 by g-C3N4, exhibited a remarkable red-shift, up to 620 nm, and allowed the visible-light driven degradation of the contaminant, albeit in combination with some adsorption.
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Affiliation(s)
- Marta Sierra
- Chemical Engineering Department, University of La Laguna, Santa Cruz de Tenerife, Spain
| | - Emma Borges
- Chemical Engineering Department, University of La Laguna, Santa Cruz de Tenerife, Spain
| | - Pedro Esparza
- Chemical Department, University of La Laguna, Santa Cruz de Tenerife, Spain
| | - Jorge Méndez-Ramos
- Physics Department, University of La Laguna, Santa Cruz de Tenerife, Spain
| | - Jesús Martín-Gil
- Advanced Materials Laboratory, ETSIIAA, University of Valladolid, Palencia, Spain
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Zambon A, Mouesca JM, Gheorghiu C, Bayle PA, Pécaut J, Claeys-Bruno M, Gambarelli S, Dubois L. s-Heptazine oligomers: promising structural models for graphitic carbon nitride. Chem Sci 2015; 7:945-950. [PMID: 29896365 PMCID: PMC5954616 DOI: 10.1039/c5sc02992a] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Accepted: 10/23/2015] [Indexed: 11/28/2022] Open
Abstract
![]() In this study, linear s-heptazine oligomers were synthesized to serve as well-defined molecular models for g-CN..
Graphitic carbon nitride (g-CN) has interesting catalytic properties but is difficult to study due to its structure and how it is produced. In this study, linear s-heptazine oligomers were synthesized to serve as well-defined molecular models for g-CN. Cyclic voltammetry, absorption and emission spectroscopies showed a clear shift of properties towards those of g-CN as the number of heptazine units increased. DFT calculations supported the characterizations, and helped refine the properties observed.
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Affiliation(s)
- A Zambon
- Univ. Grenoble Alpes , INAC-SCIB , F-38000 Grenoble , France . ; .,CEA , INAC-SCIB , F-38000 Grenoble , France.,Aix Marseille Université , LISA EA4672 , 13397 Cedex 20 , Marseille , France
| | - J-M Mouesca
- Univ. Grenoble Alpes , INAC-SCIB , F-38000 Grenoble , France . ; .,CEA , INAC-SCIB , F-38000 Grenoble , France
| | - C Gheorghiu
- Univ. Grenoble Alpes , INAC-SCIB , F-38000 Grenoble , France . ; .,CEA , INAC-SCIB , F-38000 Grenoble , France
| | - P A Bayle
- Univ. Grenoble Alpes , INAC-SCIB , F-38000 Grenoble , France . ; .,CEA , INAC-SCIB , F-38000 Grenoble , France
| | - J Pécaut
- Univ. Grenoble Alpes , INAC-SCIB , F-38000 Grenoble , France . ; .,CEA , INAC-SCIB , F-38000 Grenoble , France
| | - M Claeys-Bruno
- French Environment and Energy Management Agency 20 , avenue du Grésillé-BP 90406 49004 , Angers Cedex 01 , France
| | - S Gambarelli
- Univ. Grenoble Alpes , INAC-SCIB , F-38000 Grenoble , France . ; .,CEA , INAC-SCIB , F-38000 Grenoble , France
| | - L Dubois
- Univ. Grenoble Alpes , INAC-SCIB , F-38000 Grenoble , France . ; .,CEA , INAC-SCIB , F-38000 Grenoble , France
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Yilmazer ND, Korth M. Enhanced semiempirical QM methods for biomolecular interactions. Comput Struct Biotechnol J 2015; 13:169-75. [PMID: 25848495 PMCID: PMC4372622 DOI: 10.1016/j.csbj.2015.02.004] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 02/17/2015] [Accepted: 02/19/2015] [Indexed: 12/21/2022] Open
Abstract
Recent successes and failures of the application of 'enhanced' semiempirical QM (SQM) methods are reviewed in the light of the benefits and backdraws of adding dispersion (D) and hydrogen-bond (H) correction terms. We find that the accuracy of SQM-DH methods for non-covalent interactions is very often reported to be comparable to dispersion-corrected density functional theory (DFT-D), while computation times are about three orders of magnitude lower. SQM-DH methods thus open up a possibility to simulate realistically large model systems for problems both in life and materials science with comparably high accuracy.
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Affiliation(s)
| | - Martin Korth
- Institute of Theoretical Chemistry, Ulm University, D-89069 Ulm, Germany
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