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Zhang J, Yue L, Zeng Z, Zhao C, Fang L, Hu X, Lin H, Zhao L, He Y. Preparation of NaNbO 3 microcube with abundant oxygen vacancies and its high photocatalytic N 2 fixation activity in the help of Pt nanoparticles. J Colloid Interface Sci 2023; 636:480-491. [PMID: 36652823 DOI: 10.1016/j.jcis.2023.01.049] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 01/07/2023] [Accepted: 01/09/2023] [Indexed: 01/13/2023]
Abstract
In this study, the photocatalytic N2 immobilization performance of NaNbO3 is enhanced via oxygen vacancy introduction and Pt loading. The designed Pt-loaded NaNbO3 with rich oxygen defects (Pt/O-NaNbO3) is synthesized by combining ion-exchange and photodeposition methods. Characterization result indicates that the O-NaNbO3 has hollow microcube morphology and higher surface area than NaNbO3. The introduced oxygen defects greatly affect the energy band structure. The band gap is slightly narrowed and the conduction band is raised, allowing O-NaNbO3 to generate electrons with strong reducibility. Moreover, the oxygen defects reduced the work function of NaNbO3, leading to increased charge separation in the bulk phase. The loaded Pt nanoparticles can further increase the surface charge separation via the formed Schottky barriers between Pt and O-NaNbO3, which was thought to be the primary cause of the increased photocatalytic activity. Additionally, the oxygen vacancies and metal Pt also contribute to the adsorption and activation of N2. Under the combined effect of the above changes, Pt/O-NaNbO3 presents much higher photoactivity than NaNbO3. The optimized NH3 production rate reaches 293.3 μmol/L g-1h-1 under simulated solar light, which is approximately 2.2 and 20.2 times higher than that of O-NaNbO3 and NaNbO3, respectively. This research offers a successful illustration of how to improve photocatalytic N2 fixation and may shed some light on how to design and construct efficient photocatalysts by combining several techniques.
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Affiliation(s)
- Jiayu Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Yingbin Road 688, Jinhua 321004, China
| | - Lin Yue
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Yingbin Road 688, Jinhua 321004, China
| | - Zhihao Zeng
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Yingbin Road 688, Jinhua 321004, China
| | - Chunran Zhao
- Department of Materials Science and Engineering, Zhejiang Normal University, Yingbin Road 688, Jinhua 321004, China
| | - Linjiang Fang
- Department of Arts and Sciences, University of Washington, Seattle, WA 98195, USA
| | - Xin Hu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Yingbin Road 688, Jinhua 321004, China
| | - Hongjun Lin
- College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Leihong Zhao
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Yingbin Road 688, Jinhua 321004, China.
| | - Yiming He
- Department of Materials Science and Engineering, Zhejiang Normal University, Yingbin Road 688, Jinhua 321004, China; Key Laboratory of Solid State Optoelectronic Devices of Zhejiang Province, Zhejiang Normal University, Yingbin Road 688, Jinhua 321004, China.
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Zhang C, Liu X, Jiang M, Wen Y, Zhang J, Qian G. A review on identification, quantification, and transformation of active species in SCR by EPR spectroscopy. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:28550-28562. [PMID: 36708481 DOI: 10.1007/s11356-023-25467-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 01/17/2023] [Indexed: 06/18/2023]
Abstract
Electron paramagnetic resonance (EPR) is the only technique that provides direct detection of free radicals and samples that contain unpaired electrons. Thus, EPR had an important potential application in the field of selective catalytic reduction of nitrogen oxide (SCR). For the first time, this work reviewed recent developments of EPR in charactering SCR. First, qualitative analysis focused on recognizing Cu, Fe, V, Ti, Mn, and free-radical (oxygen vacancy and superoxide radical) species. Second, quantification of the active species was obtained by a double-integral and calibration method. Third, the active species evolved because of different thermal treatments and redox-thermal processes under reductants (NH3 and NO). The coordination information of the active species in catalysts and their effects on SCR performances were concluded from mechanism viewpoints. Finally, potential perspectives were put forward for EPR developments in characterizing the SCR processes in the future. After all, EPR characterization will help to have a deep understanding of structure-activity relationship in one catalyst.
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Affiliation(s)
- Chenchen Zhang
- SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road., Shanghai, 200444, People's Republic of China
| | - Xinyu Liu
- SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road., Shanghai, 200444, People's Republic of China
| | - Meijia Jiang
- SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road., Shanghai, 200444, People's Republic of China
| | - Yuling Wen
- Shanghai SUS Environment Co., LTD, Shanghai, 201703, China
| | - Jia Zhang
- SHU Center of Green Urban Mining & Industry Ecology, School of Environmental and Chemical Engineering, Shanghai University, No. 381 Nanchen Road., Shanghai, 200444, People's Republic of China.
| | - Guangren Qian
- MGI of Shanghai University, Xiapu Town, Xiangdong District, Pingxiang City, Jiangxi, 337022, People's Republic of China
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Wang J, Guan L, Yuan S, Zhang J, Zhao C, Hu X, Teng B, Wu Y, He Y. Greatly boosted photocatalytic N2-to-NH3 conversion by bismuth doping in CdMoO4: Band structure engineering and N2 adsorption modification. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
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Xiong Z, Liu J, Guo F, Du Y, Zhou F, Yang Q, Lu W, Shi H. Influence of nonmetallic elements doping on the NH3-SCR activity and properties of Ce20W10Ti100O catalyst via melamine modification. J SOLID STATE CHEM 2023. [DOI: 10.1016/j.jssc.2023.123879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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5
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Mechanistic and Experimental Study of the CuxO@C Nanocomposite Derived from Cu3(BTC)2 for SO2 Removal. Catalysts 2022. [DOI: 10.3390/catal12070689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
A tunable and efficient strategy was adopted to synthesize highly porous nano-structured CuO−carbonized composites (CuxO@C) using Cu3(BTC)2 as a sacrificial template. The as-synthesized CuO nanocomposites exhibited hollow octahedral structures, a large surface area (89.837 m2 g−1) and a high proportion of Cu2O active sites distributed on a carbon frame. Based on DFT calculations, both the Cu atoms on the surface (CuS) and oxygen vacancy (OV) exhibited strong chemical reactivity. On the perfect CuO (111), the CuS transferred charge to O atoms on the surface and SO2 molecules. A strong adsorption energy (−1.41 eV) indicated the existence of the chemisorption process. On the oxygen-deficient CuO (111), the O2 preferably adsorbed on OV and then formed SO3 by bonding with SO2, followed by the cleavage of the O−O bond. Furthermore, the CuO nanocomposites exhibited an excellent ratio of S/Cu in SO2 removal experiments compared with CuO nanoparticles produced by coprecipitation.
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Gu Y, Bao A, Wang X, Chen Y, Dong L, Liu X, Pan H, Li Y, Qi X. Engineering the oxygen vacancies of rocksalt-type high-entropy oxides for enhanced electrocatalysis. NANOSCALE 2022; 14:515-524. [PMID: 34918723 DOI: 10.1039/d1nr07000b] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
High-entropy oxides (HEOs), a class of compounds that include five or more elemental species, have gained increasing attraction for their capability of optimizing the target properties. To date, even though some high-entropy oxides have been successfully prepared, their applications still need to be explored. In the present study, a lithium-manipulation strategy for constructing transition metal oxides (LTM) via a modified solid-state method was investigated. The as-synthesized LTM contained six highly dispersed metal species (Li, Fe, Co, Ni, Cu, Zn) and demonstrated a rocksalt-type structure. Besides, with the introduction of Li, more oxygen vacancies were produced which was also accompanied by shrinking of the lattice constant. When the molar ratio of Li was equal to the other TM cations (LTM16.7), the electrical conductivity was greatly enhanced by a factor of 10 times. Moreover, LTM16.7 achieved the best HER (η = 207 mV at 10 mA cm-2) and OER performances (η = 347 mV at 10 mA cm-2) with elevated electrical conductivity. To facilitate further design of this new kind of materials, we also conducted DFT calculations and elemental alternation experiments, which showed that Fe acted as electrocatalytic sites in this HEOs system. This Li-incorporation strategy opens a new way to understand and modify defect-related HEOs.
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Affiliation(s)
- Yaohang Gu
- School of Materials Science and Engineering, Northeastern University, Shenyang 110189, China
| | - Ateer Bao
- School of Materials Science and Engineering, Northeastern University, Shenyang 110189, China
| | - Xuanyu Wang
- School of Materials Science and Engineering, Northeastern University, Shenyang 110189, China
| | - Yizhen Chen
- Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Liang Dong
- School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China.
- Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China
| | - Xin Liu
- School of Materials Science and Engineering, Northeastern University, Shenyang 110189, China
- School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China.
| | - Haijun Pan
- School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China.
| | - Ying Li
- School of Science, Inner Mongolia University of Science and Technology, Baotou 014010, China
| | - Xiwei Qi
- College of Metallurgy and Energy, North China of Science and Technology, Tangshan 063210, China.
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Tan Y, Li F, Zhao B, Chen W, Tian M. Hydrothermal Synthesis of a Ce-Zr-Ti Mixed Oxide Catalyst with Enhanced Catalytic Performance for a NH 3-SCR Reaction. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:14823-14832. [PMID: 34915697 DOI: 10.1021/acs.langmuir.1c02597] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
A series of mesoporous CeZrTiOx catalysts were prepared by a facile hydrothermal method. Compared with CeTiOx catalysts synthesized under the same conditions, the catalytic activity and anti-SO2 performance of the Ce1Zr1TiOx catalyst are greatly improved, and at the gas hourly space velocity (GHSV) of 60 000 h-1, the NOx removal efficiency is maintained at 90% in the temperature range of 290-500 °C. The catalytic effect of ZrO2 on the Ce-Ti catalyst NH3-SCR activity was elucidated through a series of characterizations. The results revealed that the doping of Zr could significantly improve and optimize the structure of Ce-Ti catalysts. At the same time, due to the doping of Zr, the synergistic effect between Ce and Zr in the CeZrTiOx catalyst can effectively increase oxygen mobility, total acid content, and surface adsorbed oxygen species and lead to a larger pore volume. In addition, the introduction of ZrO2 made the transformation of Ce4+ into Ce3+ more obvious, and the 2Ce4+ + Zr2+ ↔ 2Ce3+ + Zr4+ reaction greatly improved the reducibility of Ce1Zr1TiOx. Among them, the improvement of SCR performance and H2O/SO2 tolerance is due to the electronic interaction between Zr and Ce.
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Affiliation(s)
- Yifeng Tan
- College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou, China
| | - Fan Li
- College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou, China
| | - Bing Zhao
- College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou, China
| | - Wenlin Chen
- College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou, China
| | - Mengkui Tian
- College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou, China
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8
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Davarazar M, Kamali M, Lopes I. Engineered nanomaterials for (waste)water treatment - A scientometric assessment and sustainability aspects. NANOIMPACT 2021; 22:100316. [PMID: 35559973 DOI: 10.1016/j.impact.2021.100316] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 04/07/2021] [Accepted: 04/07/2021] [Indexed: 06/15/2023]
Abstract
Application of nanomaterials for the treatment of effluents originated from various industrial and non-industrial sources, has been rapidly developed in recent decades. In this situation, there is a need for conclusive studies to identify the current status of the knowledge in this field and to promote the commercialization of such technologies by providing recommendations for future studies. In the present manuscript, a scientometric assessment on the progress made in this field has been performed and the results have been organized and discussed in terms of science statistics, research hotspots and trends, as well as the relevant sustainability aspects. Based on a set of keywords, identified through a pre-literature analysis, a total of 6539 documents were retrieved from the Web of Science (WoS) database and analyzed to achieve the main goals of this study. The results demonstrate that the studies in this field have been initiated since the beginning of the 2000s but were mainly performed in lab and pilot scales. Also, China and Iran were identified as the most contributing countries in this scientific area in terms of the number of publications. Among various types of engineered nanomaterials (ENMs), there has been especial attention for the application of iron-based nanomaterials as well as carbonaceous structures (such as graphene oxide and biochar). Besides, there are not still strong collaborations formed among researchers in this area worldwide. Regarding the research hotspots, the synthesis of green and sustainable nanomaterials (e.g., biosynthesis approaches) has received attention in recent years. The results can also demonstrate that the most widely studied pathway for the removal of pollutants from (waste)waters involves the adsorption of the pollutants using ENMs. Treatment of contaminants of emerging concern (CECs) as well as exploring the mechanisms involved in the treatment of contaminated (waste)waters using ENMs and the possible by-products are considered the current trends in the literature. Regarding the sustainability aspects of ENMs for (waste)water treatment, the results achieved in this study calls for in-depth sustainability studies, which consider parameters such as economic, environmental, and social aspects of nanomaterials utilization for (waste)water treatment purposes, besides the technical parameters, to push transferring such technologies from lab and pilot scales to large and real-scale applications.
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Affiliation(s)
- Mahsa Davarazar
- Department of Biology, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
| | - Mohammadreza Kamali
- Process and Environmental Technology Lab, Department of Chemical Engineering, KU Leuven, 2860 Sint-Katelijne-Waver, Belgium; CESAM - Center of Environmental and Marine Studies & Department of Biology, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal.
| | - Isabel Lopes
- Department of Biology, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal; CESAM - Center of Environmental and Marine Studies & Department of Biology, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal
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9
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Wang X, Liu Y, Wu Z. The poisoning mechanisms of different zinc species on a ceria-based NH 3-SCR catalyst and the co-effects of zinc and gas-phase sulfur/chlorine species. J Colloid Interface Sci 2020; 566:153-162. [PMID: 32000092 DOI: 10.1016/j.jcis.2020.01.058] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 01/16/2020] [Accepted: 01/16/2020] [Indexed: 02/06/2023]
Abstract
Low-medium temperature NH3-SCR technology has been applied for years in municipal solid wastes incineration (MSWI) to control the emissions of nitrogen oxides. Unlike coal-fired flue gases, the tail gas from MSWI contains high levels of heavy metals in fly ash, especially the zinc species, which may harm SCR catalysts. As such, in this paper, the deactivation mechanism of different zinc species (ZnO, ZnSO4 and ZnCl2) on the Sb-CeZr2Ox catalysts and the co-effects of zinc species and gas-phase pollutants (including SO2 and HCl) were investigated. The experimental results indicated that the deactivation rate of various poisoning zinc species was in the order of ZnCl2 > ZnSO4 > ZnO. Moreover, the interactions between zinc and antimony species would disrupt the structure of the Sb-Ce mixed oxides to decrease the redox ability, consequently suppressing the ammonia activation and NO adsorption. Furthermore, such damaging effects on catalyst structures would promote the formation of bulk-like sulfate species in the presence of SO2, resulting in a decreased mobility of surface oxygen species, which significantly decrease the sulfur resistance. However, the presence of HCl did not show an evident co-effect on the Zn poisoned sample owing to the limited coverage of the chlorine deposition.
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Affiliation(s)
- Xiaoqiang Wang
- Department of Environmental Engineering, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, PR China
| | - Yue Liu
- Department of Environmental Engineering, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, PR China.
| | - Zhongbiao Wu
- Department of Environmental Engineering, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, PR China; Zhejiang Provincial Engineering Research Center of Industrial Boiler & Furnace Flue Gas Pollution Control, 866 Yuhangtang Road, Hangzhou 310058, PR China
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10
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Xu Z, Li Y, Lin Y, Zhu T. A review of the catalysts used in the reduction of NO by CO for gas purification. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:6723-6748. [PMID: 31939011 DOI: 10.1007/s11356-019-07469-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 12/18/2019] [Indexed: 06/10/2023]
Abstract
The reduction of NO by the CO produced by incomplete combustion in the flue gas can remove CO and NO simultaneously and economically. However, there are some problems and challenges in the industrial application which limit the application of this process. In this work, noble metal catalysts and transition metal catalysts used in the reduction of NO by CO in recent years are systematically reviewed, emphasizing the research progress on Ir-based catalysts and Cu-based catalysts with prospective applications. The effects of catalyst support, additives, pretreatment methods, and physicochemical properties of catalysts on catalytic activity are summarized. In addition, the effects of atmosphere conditions on the catalytic activity are discussed. Several kinds of reaction mechanisms are proposed for noble metal catalysts and transition metal catalysts. Ir-based catalysts have an excellent activity for NO reduction by CO in the presence of O2. Cu-based bimetallic catalysts show better catalytic performance in the absence of O2, in that the adsorption and dissociation of NO can occur on both oxygen vacancies and metal sites. Finally, the potential problems existing in the application of the reduction of NO by CO in industrial flue gas are analyzed and some promising solutions are put forward through this review.
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Affiliation(s)
- Zhicheng Xu
- Beijing Engineering Research Center of Process Pollution Control, National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yuran Li
- Beijing Engineering Research Center of Process Pollution Control, National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China.
| | - Yuting Lin
- Beijing Engineering Research Center of Process Pollution Control, National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
| | - Tingyu Zhu
- Beijing Engineering Research Center of Process Pollution Control, National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China.
- Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China.
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Oxygen vacancy-rich nitrogen-doped Co3O4 nanosheets as an efficient water-resistant catalyst for low temperature CO oxidation. J Colloid Interface Sci 2019; 553:427-435. [DOI: 10.1016/j.jcis.2019.06.046] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 06/08/2019] [Accepted: 06/14/2019] [Indexed: 10/26/2022]
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12
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Active Site of O2 and Its Improvement Mechanism over Ce-Ti Catalyst for NH3-SCR Reaction. Catalysts 2018. [DOI: 10.3390/catal8080336] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The current study on Ce-Ti catalyst was mainly focused on the function of NH3 and NO adsorption sites. In our study, by comparing Ce-Ti (doped catalyst) to Ce/Ti (supported catalyst), the active site of O2 and its improvement mechanism over Ce-Ti catalyst for NH3-Selective catalytic reduction (SCR) reactions were investigated. For Ce-Ti catalyst, a cerium atom was confirmed entering a TiO2 crystal lattice by X-ray diffraction (XRD) and Raman; the structure of Ce-□-Ti (□ represents oxygen vacancy) in Ce-Ti catalyst was confirmed by X-ray photoelectron spectroscopy (XPS) and Photoluminescence spectra (PL spectra). The nature of this structure was characterized by electron paramagnetic resonance (EPR), Ammonia temperature-programmed desorption (NH3-TPD), hydrogen temperature-programmed reduction (H2-TPR), Nitric oxide temperature-programmed desorption (NO-TPD) and In situ DRIFT. The results indicated that oxygen vacancies had a promotive effect on the adsorption and activation of oxygen, and oxygen was converted to superoxide ions in large quantities. Also, because of adsorption and activation of NO and NH3, electrons were transferred to adsorbed oxygen via oxygen vacancies, which also promoted the formation of superoxide ions. We expected that our study could promote understanding of the active site of O2 and its improvement mechanism for doped catalyst.
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Review on the latest developments in modified vanadium-titanium-based SCR catalysts. CHINESE JOURNAL OF CATALYSIS 2018. [DOI: 10.1016/s1872-2067(18)63090-6] [Citation(s) in RCA: 104] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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14
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Mn-Ce-V-WOx/TiO2 SCR Catalysts: Catalytic Activity, Stability and Interaction among Catalytic Oxides. Catalysts 2018. [DOI: 10.3390/catal8020076] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Khalaj M, Kamali M, Khodaparast Z, Jahanshahi A. Copper-based nanomaterials for environmental decontamination - An overview on technical and toxicological aspects. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 148:813-824. [PMID: 29197796 DOI: 10.1016/j.ecoenv.2017.11.060] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 11/18/2017] [Accepted: 11/22/2017] [Indexed: 06/07/2023]
Abstract
Synthesis of the various types of engineered nanomaterials has gained a huge attention in recent years for various applications. Copper based nanomaterials are a branch of this category seem to be able to provide an efficient and cost-effective way for the treatment of the persistent effluents. The present work aimed to study the various parameters may involve in the overall performance of the copper based nanomaterials for environmental clean-up purposes. To this end, the related characteristics of copper based nanomaterials and their effects on the nanomaterials reactivity and the environmental and operating parameters have been critically reviewed. Toxicological study of the copper based nanomaterials has been also considered as a factor with high importance for the selection of a typical nanomaterial with optimum performance and minimum environmental and health subsequent effects.
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Affiliation(s)
- Mohammadreza Khalaj
- Department of Environment and Planning, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Mohammadreza Kamali
- Department of Environment and Planning, Center for Environmental and Marine Studies, CESAM, Aveiro Institute of Materials, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - Zahra Khodaparast
- Department of Biology, Center for Environmental and Marine Studies, CESAM, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Akram Jahanshahi
- Department of Economics, Management, Industrial Engineering and Tourism, Department of Mechanical Engineering, University of Aveiro, 3810-193 Aveiro, Portugal
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16
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Wang L, Cheng X, Wang Z, Zhang X, Ma C. NO reduction by CO over iron-based catalysts supported by activated semi-coke. CAN J CHEM ENG 2016. [DOI: 10.1002/cjce.22678] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Luyuan Wang
- School of Energy and Power Engineering; Shandong University; Jinan, 250061 China
| | - Xingxing Cheng
- School of Energy and Power Engineering; Shandong University; Jinan, 250061 China
| | - Zhiqiang Wang
- School of Energy and Power Engineering; Shandong University; Jinan, 250061 China
| | - Xingyu Zhang
- School of Energy and Power Engineering; Shandong University; Jinan, 250061 China
| | - Chunyuan Ma
- School of Energy and Power Engineering; Shandong University; Jinan, 250061 China
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17
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Zhong L, Zhong Q, Cai W, Zhang S, Yu Y, Ou M, Song F. Promotional effect and mechanism study of nonmetal-doped Cr/CexTi1−xO2 for NO oxidation: tuning O2 activation and NO adsorption simultaneously. RSC Adv 2016. [DOI: 10.1039/c6ra01928e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Nonmetal-doped Cr/CexTi1−xO2 was conductive to tune O2 activation and NO adsorption strength simultaneously. Moreover, the catalytic mechanism was investigated for NO oxidation.
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Affiliation(s)
- Lei Zhong
- School of Environmental and Biological Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- PR China
- Nanjing AIREP Environmental Protection Technology Co., Ltd
| | - Qin Zhong
- School of Environmental and Biological Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- PR China
- School of Chemical Engineering
| | - Wei Cai
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- PR China
- Nanjing AIREP Environmental Protection Technology Co., Ltd
| | - Shen Zhang
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- PR China
| | - Yang Yu
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- PR China
- Nanjing AIREP Environmental Protection Technology Co., Ltd
| | - Man Ou
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- PR China
- Nanjing AIREP Environmental Protection Technology Co., Ltd
| | - Fujiao Song
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- PR China
- Nanjing AIREP Environmental Protection Technology Co., Ltd
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18
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Sun C, Tang Y, Gao F, Sun J, Ma K, Tang C, Dong L. Effects of different manganese precursors as promoters on catalytic performance of CuO–MnOx/TiO2 catalysts for NO removal by CO. Phys Chem Chem Phys 2015; 17:15996-6006. [DOI: 10.1039/c5cp02158h] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Since the formation of the surface synergetic oxygen vacancy SSOV (Cu+–□–Mn3+) in the xCuyMn(N)/TiO2 catalyst is easier than that (Cu+–□–Mn2+) in the xCuyMn(A)/TiO2 catalyst, the activity of the xCuyMn(N)/TiO2 catalyst is higher than that of the xCuyMn(A)/TiO2 catalyst.
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Affiliation(s)
- Chuanzhi Sun
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes
- Ministry of Education
| | - Yingjie Tang
- College of Chemistry
- Chemical Engineering and Materials Science
- Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong
- Key Laboratory of Molecular and Nano Probes
- Ministry of Education
| | - Fei Gao
- Center of Modern Analysis
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Jingfang Sun
- Center of Modern Analysis
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Kaili Ma
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Changjin Tang
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Lin Dong
- Center of Modern Analysis
- Nanjing University
- Nanjing 210093
- P. R. China
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education
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19
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Xiong Y, Yao X, Tang C, Zhang L, Cao Y, Deng Y, Gao F, Dong L. Effect of CO-pretreatment on the CuO–V2O5/γ-Al2O3 catalyst for NO reduction by CO. Catal Sci Technol 2014. [DOI: 10.1039/c4cy00785a] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The influence of CO-pretreatment on the properties of CuO–V2O5/γ-Al2O3 catalysts was investigated in the reduction of NO by CO.
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Affiliation(s)
- Yan Xiong
- Key Laboratory of Mesoscopic Chemistry of MOE
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing, PR China
- College of Chemistry and Pharmaceutical Engineering
| | - Xiaojiang Yao
- Key Laboratory of Mesoscopic Chemistry of MOE
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing, PR China
| | - Changjin Tang
- Key Laboratory of Mesoscopic Chemistry of MOE
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing, PR China
| | - Lei Zhang
- Key Laboratory of Mesoscopic Chemistry of MOE
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing, PR China
| | - Yuan Cao
- Key Laboratory of Mesoscopic Chemistry of MOE
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing, PR China
| | - Yu Deng
- Jiangsu Key Laboratory of Vehicle Emissions Control
- Center of Modern Analysis
- Nanjing University
- Nanjing 210093, PR China
| | - Fei Gao
- Jiangsu Key Laboratory of Vehicle Emissions Control
- Center of Modern Analysis
- Nanjing University
- Nanjing 210093, PR China
| | - Lin Dong
- Key Laboratory of Mesoscopic Chemistry of MOE
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing, PR China
- Jiangsu Key Laboratory of Vehicle Emissions Control
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20
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Gao P, Tai MH, Sun DD. Hierarchical TiO2/V2O5Multifunctional Membrane for Water Purification. Chempluschem 2013; 78:1475-1482. [DOI: 10.1002/cplu.201300264] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Indexed: 11/07/2022]
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