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Li Q, Zhang S, Xia W, Jiang X, Huang Z, Wu X, Zhao H, Yuan CS, Shen H, Jing G. Surface design of g-C 3N 4 quantum dot-decorated TiO 2(001) to enhance the photodegradation of indoor formaldehyde by experimental and theoretical investigation. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 234:113411. [PMID: 35298971 DOI: 10.1016/j.ecoenv.2022.113411] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 02/27/2022] [Accepted: 03/09/2022] [Indexed: 06/14/2023]
Abstract
Formaldehyde (CHOH), a common volatile organic compound, causes many adverse effects on human health. The highly exposed TiO2(001) facet possesses a high photodegradation efficiency of CHOH due to its excellent ability to trap photogenerated holes and high density of surface unsaturated Ti atoms (Ti5c) to bind CHOH. However, the rapid recombination of photoinduced electron-hole pairs of TiO2(001) limits the photodegradation efficiency. We adopted a strategy of decorating TiO2(001) with g-C3N4 quantum dots (QDs), exploiting the quantum effect of g-C3N4QDs and their combined staggered band structure. This decoration improves the photocatalytic activity of TiO2(001). Moreover, the chemical configuration of g-C3N4QDs/TiO2(001) and the combination mode between the g-C3N4QDs and TiO2(001) support were explored in detail using high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), and density functional theory (DFT) calculations. Following the physiochemical characteristic results, the transport mechanism of photoinduced carriers was further analyzed by ultraviolet photoelectron spectroscopy (UPS), electron paramagnetic resonance (EPR), and Heyd-Scuseria-Ernzerh (HSE) exchange-correlation functional calculations. Finally, the performance and reaction mechanism of the photodegradation of CHOH by TiO2(001) and g-C3N4QDs/TiO2(001) were thoroughly investigated. The results show that the g-C3N4QDs were composed of an N-defect tri-s-triazine supported by TiO2(001) via a strong C-O-Ti chemical bond, which accelerated the separation of photoinduced carriers through a Z-scheme route. The photodegradation and mineralization efficiencies of CHOH were significantly promoted by 30% and 60% for g-C3N4QDs/TiO2(001) compared with those of TiO2(001). The photodegradation mechanism proceeded as CHOH - dioxymethylene - formate - carbonate - CO2. This study provides a surface engineering means to design highly active modified TiO2 for CHOH photodegradation.
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Affiliation(s)
- Qing Li
- College of Chemical Engineering, Huaqiao University, Xiamen, Fujian, China
| | - Shaowen Zhang
- College of Chemical Engineering, Huaqiao University, Xiamen, Fujian, China
| | - Wenjie Xia
- Department of Civil, Construction and Environmental Engineering, North Dakota State University, USA
| | - Xiaoqi Jiang
- College of Chemical Engineering, Huaqiao University, Xiamen, Fujian, China
| | - Zhiwei Huang
- College of Chemical Engineering, Huaqiao University, Xiamen, Fujian, China
| | - Xiaomin Wu
- College of Chemical Engineering, Huaqiao University, Xiamen, Fujian, China
| | - Huawang Zhao
- College of Chemical Engineering, Huaqiao University, Xiamen, Fujian, China
| | - Chung-Shin Yuan
- Institute of Environmental Engineering, National Sun Yat-Sen University, No. 70, Lian-Hai Road, Kaohsiung 804, Taiwan, ROC
| | - Huazhen Shen
- College of Chemical Engineering, Huaqiao University, Xiamen, Fujian, China.
| | - Guohua Jing
- College of Chemical Engineering, Huaqiao University, Xiamen, Fujian, China.
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Coduri M, Checchia S, Longhi M, Ceresoli D, Scavini M. Rare Earth Doped Ceria: The Complex Connection Between Structure and Properties. Front Chem 2018; 6:526. [PMID: 30430105 PMCID: PMC6220118 DOI: 10.3389/fchem.2018.00526] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Accepted: 10/11/2018] [Indexed: 11/19/2022] Open
Abstract
The need for high efficiency energy production, conversion, storage and transport is serving as a robust guide for the development of new materials. Materials with physical-chemical properties matching specific functions in devices are produced by suitably tuning the crystallographic- defect- and micro-structure of the involved phases. In this review, we discuss the case of Rare Earth doped Ceria. Due to their high oxygen diffusion coefficient at temperatures higher than ~500°C, they are very promising materials for several applications such as electrolytes for Solid Oxide Fuel and Electrolytic Cells (SOFC and SOEC, respectively). Defects are integral part of the conduction process, hence of the final application. As the fluorite structure of ceria is capable of accommodating a high concentration of lattice defects, the characterization and comprehension of such complex and highly defective materials involve expertise spanning from computational chemistry, physical chemistry, catalysis, electrochemistry, microscopy, spectroscopy, and crystallography. Results coming from different experimental and computational techniques will be reviewed, showing that structure determination (at different scale length) plays a pivotal role bridging theoretical calculation and physical properties of these complex materials.
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Affiliation(s)
- Mauro Coduri
- ESRF - The European Synchrotron, Grenoble, France
| | | | - Mariangela Longhi
- Dipartimento di Chimica, Università degli Studi di Milano, Milan, Italy
| | - Davide Ceresoli
- Istituto di Scienze e Tecnologie Molecolari, CNR, Milan, Italy
| | - Marco Scavini
- Dipartimento di Chimica, Università degli Studi di Milano, Milan, Italy
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Grieshammer S. Influence of the lattice constant on defects in cerium oxide. Phys Chem Chem Phys 2018; 20:19792-19799. [PMID: 30027947 DOI: 10.1039/c8cp03677b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The lattice constant has a crucial effect on the defect chemistry and defect kinetics in solid state materials. However, within density functional theory, some functionals perform badly in reproducing the experimental lattice constant. In this study, energies of defect formation, interaction and migration in the model system ceria were calculated for different lattice constants to investigate the impact on the energies. The GGA+U functional in the PBE and PBEsol parametrization as well as the hybrid functional HSE06 were applied and results are compared among these three commonly applied functionals. The results suggest a strong influence of the lattice constant on the energies especially regarding oxygen ion migration. This influence has an impact on the accurate prediction of defect properties from first principles but can also be utilized for specific tailoring of material properties by chemo-mechanical design. In addition, the issue of the correct lattice constant, which should be used in the defect calculations, is discussed in this paper.
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Affiliation(s)
- Steffen Grieshammer
- Helmholtz-Institut Münster (IEK-12), Forschungszentrum Jülich GmbH, Corrensstraße 46, 48149 Münster, Germany.
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Capdevila-Cortada M, Łodziana Z, López N. Performance of DFT+U Approaches in the Study of Catalytic Materials. ACS Catal 2016. [DOI: 10.1021/acscatal.6b01907] [Citation(s) in RCA: 108] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Marçal Capdevila-Cortada
- Institute
of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans, 16, 43007 Tarragona, Spain
| | - Zbigniew Łodziana
- The Henryk Niewodniczanski Institute of Nuclear Physics (IFJ-PAN) Radzikowskiego 152, 31-342 Kraków, Poland
| | - Núria López
- Institute
of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans, 16, 43007 Tarragona, Spain
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Simulated Temperature Programmed Desorption of Acetaldehyde on CeO2(111): Evidence for the Role of Oxygen Vacancy and Hydrogen Transfer. Top Catal 2016. [DOI: 10.1007/s11244-016-0703-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Kattel S, Yu W, Yang X, Yan B, Huang Y, Wan W, Liu P, Chen JG. CO
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Hydrogenation over Oxide‐Supported PtCo Catalysts: The Role of the Oxide Support in Determining the Product Selectivity. Angew Chem Int Ed Engl 2016; 55:7968-73. [DOI: 10.1002/anie.201601661] [Citation(s) in RCA: 183] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 04/13/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Shyam Kattel
- Chemistry Department Brookhaven National Laboratory 2 Center St. Upton NY 11973 USA
| | - Weiting Yu
- Department of Chemical Engineering Columbia University 1500 W. 120th St. New York NY 10027 USA
| | - Xiaofang Yang
- Chemistry Department Brookhaven National Laboratory 2 Center St. Upton NY 11973 USA
| | - Binhang Yan
- Chemistry Department Brookhaven National Laboratory 2 Center St. Upton NY 11973 USA
| | - Yanqiang Huang
- Dalian Institute of Chemical Physics Chinese Academy of Science Dalian 116023 China
| | - Weiming Wan
- Department of Chemical Engineering Columbia University 1500 W. 120th St. New York NY 10027 USA
| | - Ping Liu
- Chemistry Department Brookhaven National Laboratory 2 Center St. Upton NY 11973 USA
| | - Jingguang G. Chen
- Chemistry Department Brookhaven National Laboratory 2 Center St. Upton NY 11973 USA
- Department of Chemical Engineering Columbia University 1500 W. 120th St. New York NY 10027 USA
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Kattel S, Yu W, Yang X, Yan B, Huang Y, Wan W, Liu P, Chen JG. CO
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Hydrogenation over Oxide‐Supported PtCo Catalysts: The Role of the Oxide Support in Determining the Product Selectivity. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201601661] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Shyam Kattel
- Chemistry Department Brookhaven National Laboratory 2 Center St. Upton NY 11973 USA
| | - Weiting Yu
- Department of Chemical Engineering Columbia University 1500 W. 120th St. New York NY 10027 USA
| | - Xiaofang Yang
- Chemistry Department Brookhaven National Laboratory 2 Center St. Upton NY 11973 USA
| | - Binhang Yan
- Chemistry Department Brookhaven National Laboratory 2 Center St. Upton NY 11973 USA
| | - Yanqiang Huang
- Dalian Institute of Chemical Physics Chinese Academy of Science Dalian 116023 China
| | - Weiming Wan
- Department of Chemical Engineering Columbia University 1500 W. 120th St. New York NY 10027 USA
| | - Ping Liu
- Chemistry Department Brookhaven National Laboratory 2 Center St. Upton NY 11973 USA
| | - Jingguang G. Chen
- Chemistry Department Brookhaven National Laboratory 2 Center St. Upton NY 11973 USA
- Department of Chemical Engineering Columbia University 1500 W. 120th St. New York NY 10027 USA
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CO, CO2 and H2 adsorption on ZnO, CeO2, and ZnO/CeO2 surfaces: DFT simulations. J Mol Model 2014; 20:2270. [DOI: 10.1007/s00894-014-2270-0] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Accepted: 04/23/2014] [Indexed: 11/26/2022]
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