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Li K, Zhou W, Li X, Li Q, Carabineiro SAC, Zhang S, Fan J, Lv K. Synergistic effect of cyano defects and CaCO 3 in graphitic carbon nitride nanosheets for efficient visible-light-driven photocatalytic NO removal. JOURNAL OF HAZARDOUS MATERIALS 2023; 442:130040. [PMID: 36182883 DOI: 10.1016/j.jhazmat.2022.130040] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 09/16/2022] [Accepted: 09/19/2022] [Indexed: 06/16/2023]
Abstract
Photo-oxidation with semiconductor photocatalysts provides a sustainable and green solution for NOx elimination. Nevertheless, the utilization of traditional photocatalysts in efficient and safe photocatalytic NOx removal is still a challenge due to the slow charge kinetic process and insufficient optical absorption. In this paper, we report a novel porous g-C3N4 nanosheet photocatalyst modified with cyano defects and CaCO3 (xCa-CN). The best performing sample (0.5Ca-CN) exhibits an enhanced photo-oxidation NO removal rate (51.18 %) under visible light irradiation, largely surpassing the value of pristine g-C3N4 nanosheets (34.05 %). Such an enhancement is mainly derived from an extended visible-light response, improved electron excitation and transfer, which are associated with the synergy of cyano defects and CaCO3, as evidenced by a series of spectroscopic analyses. More importantly, in-situ DRIFTS and density functional theory (DFT) results suggest that the introduction of cyano defects and CaCO3 enables control over NO adsorption and activation processes, making it possible to implement a preference pathway (NO → NO+ → NO3¯) and reduce the emission of toxic intermediate NO2. This work demonstrates the potential of integrating defect engineering and insulator modification to design highly efficient g-C3N4-based photocatalysts for air purification.
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Affiliation(s)
- Kaining Li
- College of Chemistry and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, PR China; Key Laboratory of Resources Conversion and Pollution Control of the State Ethnic Affairs Commission, College of Resources and Environment, South-Central Minzu University, Wuhan 430074, PR China
| | - Weichuang Zhou
- Key Laboratory of Resources Conversion and Pollution Control of the State Ethnic Affairs Commission, College of Resources and Environment, South-Central Minzu University, Wuhan 430074, PR China
| | - Xiaofang Li
- College of Chemistry and Environmental Engineering, Wuhan Polytechnic University, Wuhan 430023, PR China.
| | - Qin Li
- Key Laboratory of Resources Conversion and Pollution Control of the State Ethnic Affairs Commission, College of Resources and Environment, South-Central Minzu University, Wuhan 430074, PR China
| | - Sónia A C Carabineiro
- LAQV-REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, Universidade NOVA de Lisboa, Caparica 2829-516, Portugal
| | - Sushu Zhang
- Key Laboratory of Resources Conversion and Pollution Control of the State Ethnic Affairs Commission, College of Resources and Environment, South-Central Minzu University, Wuhan 430074, PR China
| | - Jiajie Fan
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, PR China
| | - Kangle Lv
- Key Laboratory of Resources Conversion and Pollution Control of the State Ethnic Affairs Commission, College of Resources and Environment, South-Central Minzu University, Wuhan 430074, PR China.
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2
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Tan T, Wang X, Zhou X, Ma H, Fang R, Geng Q, Dong F. Highly active Cs 2SnCl 6/C 3N 4 heterojunction photocatalysts operating via interfacial charge transfer mechanism. JOURNAL OF HAZARDOUS MATERIALS 2022; 439:129694. [PMID: 36104916 DOI: 10.1016/j.jhazmat.2022.129694] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 07/19/2022] [Accepted: 07/27/2022] [Indexed: 06/15/2023]
Abstract
In this study, a novel lead-free perovskite heterojunction Cs2SnCl6/C3N4 composite was constructed and applied for photocatalytic NO purification. After design optimization, the Cs2SnCl6/C3N4 heterojunction exhibit excellent and stable photocatalytic NO purification ability under visible-light irradiation, which is significantly better than pristine Cs2SnCl6 and C3N4. Combined in-situ DRIFTS and electron spin resonance spin-trapping, the mechanism of Cs2SnCl6/C3N4 photocatalytic NO removal was revealed. Under visible-light irradiation, the photo-generated electrons on the conduction band of C3N4 would spontaneously migrate to the CB of Cs2SnCl6, leaving holes (h+) on the valence band of C3N4, contributing to efficiently segregated charge carriers and improved photocatalytic NO purification. Density functional theory calculations also revealed the directional electron transfer at the C3N4 and Cs2SnCl6 interface, in which the charge was migrated from C3N4 to Cs2SnCl6 induced by the internal electric field. This research sheds fresh light on the fabrication of Cs2SnCl6/C3N4 heterojunctions as well as its effective interfacial charge separation.
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Affiliation(s)
- Tianqi Tan
- College of Environment and Resources, Chongqing Key Laboratory of Catalysis and New Environmental Materials, Chongqing Technology and Business University, Chongqing 400067, China
| | - Xuemei Wang
- College of Environment and Resources, Chongqing Key Laboratory of Catalysis and New Environmental Materials, Chongqing Technology and Business University, Chongqing 400067, China
| | - Xi Zhou
- College of Environment and Resources, Chongqing Key Laboratory of Catalysis and New Environmental Materials, Chongqing Technology and Business University, Chongqing 400067, China
| | - Hao Ma
- College of Environment and Resources, Chongqing Key Laboratory of Catalysis and New Environmental Materials, Chongqing Technology and Business University, Chongqing 400067, China
| | - Ruimei Fang
- College of Environment and Resources, Chongqing Key Laboratory of Catalysis and New Environmental Materials, Chongqing Technology and Business University, Chongqing 400067, China
| | - Qin Geng
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313000, China.
| | - Fan Dong
- College of Environment and Resources, Chongqing Key Laboratory of Catalysis and New Environmental Materials, Chongqing Technology and Business University, Chongqing 400067, China; Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313000, China; State Centre for International Cooperation on Designer Low-Carbon and Environmental Materials (CDLCEM), School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China.
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3
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Non-Oxidative Propane Dehydrogenation on CrO x-ZrO 2-SiO 2 Catalyst Prepared by One-Pot Template-Assisted Method. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27186095. [PMID: 36144826 PMCID: PMC9501860 DOI: 10.3390/molecules27186095] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 09/08/2022] [Accepted: 09/16/2022] [Indexed: 11/17/2022]
Abstract
A series of CrOx-ZrO2-SiO2 (CrZrSi) catalysts was prepared by a "one-pot" template-assisted evaporation-induced self-assembly process. The chromium content varied from 4 to 9 wt.% assuming Cr2O3 stoichiometry. The catalysts were characterized by XRD, SEM-EDX, temperature-programmed reduction (TPR-H2), Raman spectroscopy, and X-ray photoelectron spectroscopy. The catalysts were tested in non-oxidative propane dehydrogenation at 500-600 °C. The evolution of active sites under the reaction conditions was investigated by reductive treatment of the catalysts with H2. The catalyst with the lowest Cr loading initially contained amorphous Cr3+ and dispersed Cr6+ species. The latter reduced under reaction conditions forming Cr3+ oxide species with low activity in propane dehydrogenation. The catalysts with higher Cr loadings initially contained highly dispersed Cr3+ species stable under the reaction conditions and responsible for high catalyst activity. Silica acted both as a textural promoter that increased the specific surface area of the catalysts and as a stabilizer that inhibited crystallization of Cr2O3 and ZrO2 and provided the formation of coordinatively unsaturated Zr4+ centers. The optimal combination of Cr3+ species and coordinatively unsaturated Zr4+ centers was achieved in the catalyst with the highest Cr loading. This catalyst showed the highest efficiency.
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4
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Au Nanoparticles Loaded Bi5Ti3FeO15 Ferroelectric Nanosheets with Enhanced Photocatalytic Activity for NO Removal. Catal Letters 2022. [DOI: 10.1007/s10562-022-04115-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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5
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Hu M, Meng F, Li N, Zhang S, Ma J. Insight Into the CuOx Interacts with Oxygen Vacancies on the Surface of Black-TiO2 for NO Oxidation. Catal Letters 2021. [DOI: 10.1007/s10562-021-03729-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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6
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Xiao L, Chen P, Yang W, Zhao X, Dong F. Photocatalytic reaction mechanisms at the gas–solid interface for environmental and energy applications. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01776d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Five gas–solid photocatalytic reactions including the oxidation of NOx, VOCs and NH3, and reduction of CO2 and N2 are summarized. Besides, basic properties of gas molecules, their adsorption and activation, and various reaction pathways are analyzed.
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Affiliation(s)
- Lei Xiao
- Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313000, China
| | - Peng Chen
- The Center of New Energy Materials and Technology, School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, China
| | - Weiping Yang
- Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313000, China
| | - Xiaoli Zhao
- Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Fan Dong
- Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
- Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313000, China
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7
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Meng F, Zhang M, Zhou F, Zou H, Zhu B, Zeng Y, Zhang S, Zhong Q. CrOx Anchored on the Black-TiO2 Surface via Organic Carboxylic Acid Ligand and Its Catalysis in Oxidation of NO. Catal Letters 2020. [DOI: 10.1007/s10562-020-03434-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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8
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Pseudocapacitive efficiency of covalently Cr-complex with L-histidine-methyl ester as a ligand graphene oxide blended with conducting polymer (POAP) as electrode material in supercapacitor. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113697] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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9
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Wu R, Ye Q, Wu K, Cheng S, Kang T, Dai H. Adsorption performance of CMK-3 and C-FDU-15 in NO removal at low temperature. J Environ Sci (China) 2020; 87:289-298. [PMID: 31791502 DOI: 10.1016/j.jes.2019.07.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 07/18/2019] [Accepted: 07/18/2019] [Indexed: 06/10/2023]
Abstract
CMK-3 and C-FDU-15 samples were synthesized using hard-templating and evaporation-induced self-assembly (EISA) methods, respectively. The pore structures of CMK-3 and C-FDU-15 as well as commercial activated carbon were characterized by means of X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, and N2 adsorption-desorption. Adsorption of NO was investigated by means of thermogravimetric analysis, temperature-programmed desorption of NO + O2, and in situ diffuse reflectance Fourier transform infrared spectroscopy. The results show that the CMK-3 and C-FDU-15 materials possessed ordered and uniform structures. The co-adsorption capacity of NO and O2 decreased in the sequence CMK-3 (88.6 mg/g) > C-FDU-15 (71.7 mg/g) > AC (25.3 mg/g). There were two main adsorption species on CMK-3 and C-FDU-15: nitrite and nitrate. Nitrite is converted to nitrate easily. However, the adsorption species were more complex on AC, with nitrite being the main species. Moreover, CMK-3 and C-FDU-15 exhibit excellent regeneration efficiency compared with AC. The excellent NO adsorption performance of CMK-3 and C-FDU-15 was associated with their ordered mesoporous structures and high surface areas. The research provides more options for NO adsorption in the future.
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Affiliation(s)
- Runping Wu
- Key Laboratory of Beijing on Regional Air Pollution Control, Department of Environmental Science, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
| | - Qing Ye
- Key Laboratory of Beijing on Regional Air Pollution Control, Department of Environmental Science, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China.
| | - Kai Wu
- Key Laboratory of Beijing on Regional Air Pollution Control, Department of Environmental Science, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
| | - Shuiyuan Cheng
- Key Laboratory of Beijing on Regional Air Pollution Control, Department of Environmental Science, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
| | - Tianfang Kang
- Key Laboratory of Beijing on Regional Air Pollution Control, Department of Environmental Science, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
| | - Hongxing Dai
- Beijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Key Laboratory of Advanced Functional Materials, Education Ministry of China, and Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China.
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10
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Tan JZY, Xia F, Maroto‐Valer MM. Raspberry-Like Microspheres of Core-Shell Cr 2 O 3 @TiO 2 Nanoparticles for CO 2 Photoreduction. CHEMSUSCHEM 2019; 12:5246-5252. [PMID: 31483949 PMCID: PMC6972636 DOI: 10.1002/cssc.201901712] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 08/22/2019] [Indexed: 05/30/2023]
Abstract
To promote the interaction of p-n semiconductors, raspberry-like microspheres of core-shell Cr2 O3 @TiO2 nanoparticles have been fabricated through a five-step process. Raman spectroscopy of products calcined at various temperatures reveal that the titania shell causes crystal distortion of the Cr2 O3 core, without changing the microstructures of the fabricated core-shell microspheres. In situ and time-resolved synchrotron-based powder XRD reveals the formation of monoclinic TiO2 in the fourth step, but these monoclinic TiO2 nanocrystals undergo a phase transition when the applied calcination temperature is above 550 °C. As a result, TiO2 (B), a magnéli phase of Ti4 O7 and Cr2 Ti6 O15 compounds, resulting from inner doping between Cr2 O3 and TiO2 , is formed. The close interaction of Cr2 O3 and TiO2 forms a p-n junction that decreases the recombination of photogenerated electron-hole pairs, leading to enhanced production of CH4 by photocatalytic reduction of CO2 .
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Affiliation(s)
- Jeannie Z. Y. Tan
- Research Centre for Carbon Solutions (RCCS)Heriot–Watt UniversityEdinburghEH14 4ASUK
| | - Fang Xia
- Discipline of Chemistry and Physics, College of Science, Health, Engineering, and EducationMurdoch UniversityMurdochWestern Australia6150Australia
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11
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The effect of polyethylene glycol modification on CrO /TiO2 catalysts for NO oxidation. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.123588] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Ashraf MA, Liu Z, Li C, Peng WX, Najafi M. Examination of potential of B-CNT (6, 0), Al-CNT (6, 0) and Ga-CNT (6, 0) as novel catalysts to oxygen reduction reaction: A DFT study. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111366] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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13
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Li Y, Yang B, Yan L, Gao W, Najafi M. Role of boron doped silicon nanocage (B-Si48) as catalyst for oxygen reduction reaction in fuel cells. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.136629] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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14
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Meng F, Zhang S, Li X, Zeng Y, Zhong Q. CrO assembled at the oxygen vacancies on black-TiO2 for NO oxidation. MOLECULAR CATALYSIS 2019. [DOI: 10.1016/j.mcat.2019.110393] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Sun M, Zhang W, Sun Y, Zhang Y, Dong F. Synergistic integration of metallic Bi and defects on BiOI: Enhanced photocatalytic NO removal and conversion pathway. CHINESE JOURNAL OF CATALYSIS 2019. [DOI: 10.1016/s1872-2067(18)63195-x] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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16
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Li J, Ran M, Chen P, Cui W, Li J, Sun Y, Jiang G, Zhou Y, Dong F. Controlling the secondary pollutant on B-doped g-C3N4 during photocatalytic NO removal: a combined DRIFTS and DFT investigation. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01030k] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mechanisms of enhanced photocatalysis efficiency and suppression of toxic intermediate production during photocatalytic NO oxidation on B-doped g-C3N4 were revealed.
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Affiliation(s)
- Jiarui Li
- Engineering Research Center for Waste Oil Recovery Technology and Equipment of Ministry of Education
- Chongqing Key Laboratory of Catalysis and New Environmental Materials
- College of Environment and Resources
- Chongqing Technology and Business University
- Chongqing 400067
| | - Maoxi Ran
- Engineering Research Center for Waste Oil Recovery Technology and Equipment of Ministry of Education
- Chongqing Key Laboratory of Catalysis and New Environmental Materials
- College of Environment and Resources
- Chongqing Technology and Business University
- Chongqing 400067
| | - Peng Chen
- Engineering Research Center for Waste Oil Recovery Technology and Equipment of Ministry of Education
- Chongqing Key Laboratory of Catalysis and New Environmental Materials
- College of Environment and Resources
- Chongqing Technology and Business University
- Chongqing 400067
| | - Wen Cui
- Research Center for Environmental Science & Technology
- Institute of Fundamental and Frontier Sciences
- University of Electronic Science and Technology of China
- Chengdu 611731
- China
| | - Jieyuan Li
- Research Center for Environmental Science & Technology
- Institute of Fundamental and Frontier Sciences
- University of Electronic Science and Technology of China
- Chengdu 611731
- China
| | - Yanjuan Sun
- Engineering Research Center for Waste Oil Recovery Technology and Equipment of Ministry of Education
- Chongqing Key Laboratory of Catalysis and New Environmental Materials
- College of Environment and Resources
- Chongqing Technology and Business University
- Chongqing 400067
| | - Guangming Jiang
- Engineering Research Center for Waste Oil Recovery Technology and Equipment of Ministry of Education
- Chongqing Key Laboratory of Catalysis and New Environmental Materials
- College of Environment and Resources
- Chongqing Technology and Business University
- Chongqing 400067
| | - Ying Zhou
- Research Center for Environmental Science & Technology
- Institute of Fundamental and Frontier Sciences
- University of Electronic Science and Technology of China
- Chengdu 611731
- China
| | - Fan Dong
- Engineering Research Center for Waste Oil Recovery Technology and Equipment of Ministry of Education
- Chongqing Key Laboratory of Catalysis and New Environmental Materials
- College of Environment and Resources
- Chongqing Technology and Business University
- Chongqing 400067
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17
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Wang H, Sun Y, He W, Zhou Y, Lee SC, Dong F. Visible light induced electron transfer from a semiconductor to an insulator enables efficient photocatalytic activity on insulator-based heterojunctions. NANOSCALE 2018; 10:15513-15520. [PMID: 30091773 DOI: 10.1039/c8nr03845g] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Photogenerated electrons play a vital role in photocatalysis as they can induce the formation of radicals participating in the reaction or recombine with holes preventing them from the subsequent redox reaction. In this work, we explore an Earth-abundant insulator coupled with a semiconductor and construct insulator-semiconductor heterojunctions to effectively realize the efficient electron transfer from the semiconductor to the insulator and thus the enhanced charge carrier separation on the semiconductor. This result will challenge the traditional opinion that free electrons cannot be transferred onto insulators. Taking the BaCO3 insulator as a case study, the combined experimental and theoretical evidence indicates that the photogenerated electrons from the BiOI semiconductor could transfer directly to the BaCO3 insulator through a preformed electron delivery channel when they are coupled to form BaCO3/BiOI heterojunctions. The potential difference between the Bi layer of BiOI (5.03 eV) and the carbonate layer of BaCO3 (12.37 eV) would drive the transfer of excited electrons from Bi atoms across the energy barrier to the adjacent carbonate layer under visible light irradiation. Consequently, the free electrons on BaCO3 can be utilized to produce the oxidative radicals (˙OH, ˙O2- and 1O2) participating in the photocatalytic oxidation reaction. The in situ FT-IR spectra illustrate that the visible light induced active species in the heterojunctions could react with NO, leading to its oxidation to high valence state intermediates (NO+ and NO2+) first and then conversion to the final product of nitrates. This research offers new perspectives to explore insulator-based photocatalysts and unravel the gas-phase photocatalytic reaction mechanism.
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Affiliation(s)
- Hong Wang
- Chongqing Key Laboratory of Catalysis and New Environmental Materials, College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China.
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18
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Jin J, Sun N, Hu W, Yuan H, Wang H, Hu P. Insight into Room-Temperature Catalytic Oxidation of Nitric oxide by Cr2O3: A DFT Study. ACS Catal 2018. [DOI: 10.1021/acscatal.8b00081] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jiamin Jin
- Key Laboratories for advanced Materials, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| | - Ningling Sun
- Key Laboratories for advanced Materials, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| | - Wende Hu
- Key Laboratories for advanced Materials, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| | - Haiyang Yuan
- Key Laboratories for advanced Materials, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| | - Haifeng Wang
- Key Laboratories for advanced Materials, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
| | - Peijun Hu
- Key Laboratories for advanced Materials, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, People’s Republic of China
- School of Chemistry and Chemical Engineering, Queen’s University Belfast, Belfast BT9 5AZ, U.K
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19
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Ran M, Li J, Cui W, Li Y, Li P, Dong F. Efficient and stable photocatalytic NO removal on C self-doped g-C3N4: electronic structure and reaction mechanism. Catal Sci Technol 2018. [DOI: 10.1039/c8cy00887f] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The unique electronic structure of C self-doped g-C3N4 enables highly enhanced photocatalytic NO removal efficiency.
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Affiliation(s)
- Maoxi Ran
- Chongqing Key Laboratory of Catalysis and New Environmental Materials
- College of Environment and Resources
- Chongqing Technology and Business University
- Chongqing 400067
- China
| | - Jiarui Li
- Chongqing Key Laboratory of Catalysis and New Environmental Materials
- College of Environment and Resources
- Chongqing Technology and Business University
- Chongqing 400067
- China
| | - Wen Cui
- Chongqing Key Laboratory of Catalysis and New Environmental Materials
- College of Environment and Resources
- Chongqing Technology and Business University
- Chongqing 400067
- China
| | - Yuhan Li
- Chongqing Key Laboratory of Catalysis and New Environmental Materials
- College of Environment and Resources
- Chongqing Technology and Business University
- Chongqing 400067
- China
| | - Peidong Li
- Chongqing Key Laboratory of Catalysis and New Environmental Materials
- College of Environment and Resources
- Chongqing Technology and Business University
- Chongqing 400067
- China
| | - Fan Dong
- Chongqing Key Laboratory of Catalysis and New Environmental Materials
- College of Environment and Resources
- Chongqing Technology and Business University
- Chongqing 400067
- China
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20
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Zhang W, Liu X, Dong X, Dong F, Zhang Y. Facile synthesis of Bi 12 O 17 Br 2 and Bi 4 O 5 Br 2 nanosheets: In situ DRIFTS investigation of photocatalytic NO oxidation conversion pathway. CHINESE JOURNAL OF CATALYSIS 2017. [DOI: 10.1016/s1872-2067(17)62941-3] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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21
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Mechanistic investigation of the different poisoning mechanisms of Cl and P on Mn/TiO 2 catalyst for selective catalytic reduction of NO x with NH 3. J Taiwan Inst Chem Eng 2017. [DOI: 10.1016/j.jtice.2017.07.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Cui W, Li J, Dong F, Sun Y, Jiang G, Cen W, Lee SC, Wu Z. Highly Efficient Performance and Conversion Pathway of Photocatalytic NO Oxidation on SrO-Clusters@Amorphous Carbon Nitride. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:10682-10690. [PMID: 28817265 DOI: 10.1021/acs.est.7b00974] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
This work demonstrates the first molecular-level conversion pathway of NO oxidation over a novel SrO-clusters@amorphous carbon nitride (SCO-ACN) photocatalyst, which is synthesized via copyrolysis of urea and SrCO3. The inclusion of SrCO3 is crucial in the formation of the amorphous carbon nitride (ACN) and SrO clusters by attacking the intralayer hydrogen bonds at the edge sites of graphitic carbon nitride (CN). The amorphous nature of ACN can promote the transportation, migration, and transformation of charge carriers on SCO-ACN. And the SrO clusters are identified as the newly formed active centers to facilitate the activation of NO via the formation of Sr-NOδ(+), which essentially promotes the conversion of NO to the final products. The combined effects of the amorphous structure and SrO clusters impart outstanding photocatalytic NO removal efficiency to the SCO-ACN under visible-light irradiation. To reveal the photocatalytic mechanism, the adsorption and photocatalytic oxidation of NO over CN and SCO-ACN are analyzed by in situ DRIFTS, and the intermediates and conversion pathways are elucidated and compared. This work presents a novel in situ DRIFTS-based strategy to explore the photocatalytic reaction pathway of NO oxidation, which is quite beneficial to understand the mechanism underlying the photocatalytic reaction and advance the development of photocatalytic technology for environmental remediation.
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Affiliation(s)
- Wen Cui
- Chongqing Key Laboratory of Catalysis and New Environmental Materials, College of Environment and Resources, Chongqing Technology and Business University , Chongqing 400067, China
| | - Jieyuan Li
- College of Architecture and Environment, Institute of New Energy and Low Carbon Technology, Sichuan University , Sichuan 610065, China
| | - Fan Dong
- Chongqing Key Laboratory of Catalysis and New Environmental Materials, College of Environment and Resources, Chongqing Technology and Business University , Chongqing 400067, China
| | - Yanjuan Sun
- Chongqing Key Laboratory of Catalysis and New Environmental Materials, College of Environment and Resources, Chongqing Technology and Business University , Chongqing 400067, China
| | - Guangming Jiang
- Chongqing Key Laboratory of Catalysis and New Environmental Materials, College of Environment and Resources, Chongqing Technology and Business University , Chongqing 400067, China
| | - Wanglai Cen
- College of Architecture and Environment, Institute of New Energy and Low Carbon Technology, Sichuan University , Sichuan 610065, China
| | - S C Lee
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University , Hong Kong, China
| | - Zhongbiao Wu
- Department of Environmental Engineering, Zhejiang University , Hangzhou 310027, China
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Steering the interlayer energy barrier and charge flow via bioriented transportation channels in g-C3N4: Enhanced photocatalysis and reaction mechanism. J Catal 2017. [DOI: 10.1016/j.jcat.2017.05.017] [Citation(s) in RCA: 154] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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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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