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Xiong Z, Zhang J, Guo F, Zhou F, Yang Q, Lu W, Shi H. Optimizing study on the NH 3-SCR activity of Ce-W-Ti@g-C 3N 4 catalyst: influence of graphite carbon nitride types. ENVIRONMENTAL TECHNOLOGY 2024; 45:4512-4525. [PMID: 37675519 DOI: 10.1080/09593330.2023.2256990] [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: 04/21/2023] [Accepted: 08/19/2023] [Indexed: 09/08/2023]
Abstract
Herein, three g-C3N4(MCN/TCN/UCN), obtained by the direct pyrolysis of melamine/urea/thiourea respectively, were introduced as supports to optimize the NH3-SCR activity of Ce-W-Ti catalyst. Compared to CWT-400-Air, CWT@g-C3N4(2)-300-N2 exhibits lower crystalline anatase TiO2 and larger specific surface area, which improves the dispersion of Ce/W/Ti species on catalysts surface. Furthermore, the introduction of g-C3N4 as supports also contributes to doping C/N elements into Ce-W-Ti catalyst and increases the Ce3+/(Ce3++Ce4+) and Oα/(Oα+Oβ) molar ratios on catalyst surface. These all are advantageous to the NH3-SCR activity. However, UCN shows better promotional effect than MCN and TCN. This might be mainly attributed to the loose and porous stacked layered fold structure of UCN, the larger BET surface area, higher dispersion of Ce/W/Ti species and moderate weak/medium-strong acid sites of CWT@UCN(2)-300-N2. At the same time, the influence of carbon nitride amount, calcination atmosphere and calcination temperature on the NH3-SCR activity of CWT@g-C3N4 catalyst were also investigated.
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Affiliation(s)
- Zhibo Xiong
- School of Energy and Power Engineering, University of Shanghai for Science & Technology, Shanghai, People's Republic of China
| | - Jing Zhang
- School of Energy and Power Engineering, University of Shanghai for Science & Technology, Shanghai, People's Republic of China
| | - Fucheng Guo
- School of Energy and Power Engineering, University of Shanghai for Science & Technology, Shanghai, People's Republic of China
| | - Fei Zhou
- School of Energy and Power Engineering, University of Shanghai for Science & Technology, Shanghai, People's Republic of China
- Jiangsu Guoxin Jingjiang Power Generation Co., Ltd., Jingjiang, People's Republic of China
| | - Qiguo Yang
- School of Energy and Power Engineering, University of Shanghai for Science & Technology, Shanghai, People's Republic of China
| | - Wei Lu
- School of Energy and Power Engineering, University of Shanghai for Science & Technology, Shanghai, People's Republic of China
| | - Huancong Shi
- Huzhou Institute of Zhejiang University, Huzhou, People's Republic of China
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Zhang T, Zhu J, Wang Q, Xie M, Meng K, Mao L, Yang L, Pan T, Gao M, Yao G, Lin Y. Flexible Antibacterial Respiratory Monitoring Sensor Based on Controllable Au-Modified Surface of Highly {001} Preferred Anatase Titanium Dioxide Thin Film. ACS Biomater Sci Eng 2024; 10:1722-1733. [PMID: 38373308 DOI: 10.1021/acsbiomaterials.3c01164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2024]
Abstract
Respiratory signals are critical clinical diagnostic criteria for respiratory diseases and health conditions, and respiratory sensors play a crucial role in achieving the desired respiratory monitoring effect. High sensitivity to a single factor can improve the reliability of respiratory monitoring, and maintaining the hygiene of the sensors is also important for daily health monitoring. Herein, we propose a flexible Au-modified anatase titanium dioxide resistive respiratory sensor, which can be mechanically compliantly attached to curved surfaces for respiratory monitoring in different modalities (i.e., respiratory intensity, frequency, and rate). The uniform and preferentially oriented anatase titanium dioxide films gained by the polymer-assisted deposition technique can be fabricated on flexible substrates through a liquid-assisted transferring process. The Au modification can enhance surface plasmon resonance to facilitate the photocatalytic activity of titanium dioxide, and the optimized distribution of Au on the surface of titanium dioxide film made the sensor have an excellent antibacterial effect. The uniquely designed encapsulation can effectively control the contact between the surface of titanium dioxide films and electrodes, allowing the flexible sensor to exhibit fast response time (0.71 s) and recovery time (1.06 s) to respiratory as well as insensitivity or low sensitivity to other factors (i.e., gas composition, humidity, temperature, stress, and strain). This work provided an effective strategy for flexible wearable respiratory sensors and has great potential in daily respiratory monitoring for health management and pandemic control.
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Affiliation(s)
- Tianyao Zhang
- School of Material and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China
- Yangtze Delta Region Institute (Quzhou), University of Electronic Science and Technology of China, Quzhou, Zhejiang 324000, China
| | - Jia Zhu
- School of Material and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Qian Wang
- School of Material and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Maowen Xie
- School of Material and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Ke Meng
- School of Material and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Longbiao Mao
- Department of Health Sciences and Biomedical Engineering, Hebei University of Technology, Tianjin 300130, China
| | - Li Yang
- Department of Health Sciences and Biomedical Engineering, Hebei University of Technology, Tianjin 300130, China
| | - Taisong Pan
- School of Material and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Min Gao
- School of Material and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China
| | - Guang Yao
- School of Material and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China
- Medico-Engineering Cooperation on Applied Medicine Research Center, University of Electronics Science and Technology of China, Chengdu 610054, China
| | - Yuan Lin
- School of Material and Energy, University of Electronic Science and Technology of China, Chengdu 610054, China
- Medico-Engineering Cooperation on Applied Medicine Research Center, University of Electronics Science and Technology of China, Chengdu 610054, China
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Li X, Ren S, Chen Z, Wang M, Chen L, Chen H, Yin X. A Review of Mn-Based Catalysts for Abating NO x and CO in Low-Temperature Flue Gas: Performance and Mechanisms. Molecules 2023; 28:6885. [PMID: 37836730 PMCID: PMC10574052 DOI: 10.3390/molecules28196885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 09/09/2023] [Accepted: 09/26/2023] [Indexed: 10/15/2023] Open
Abstract
Mn-based catalysts have attracted significant attention in the field of catalytic research, particularly in NOx catalytic reductions and CO catalytic oxidation, owing to their good catalytic activity at low temperatures. In this review, we summarize the recent progress of Mn-based catalysts for the removal of NOx and CO. The effects of crystallinity, valence states, morphology, and active component dispersion on the catalytic performance of Mn-based catalysts are thoroughly reviewed. This review delves into the reaction mechanisms of Mn-based catalysts for NOx reduction, CO oxidation, and the simultaneous removal of NOx and CO. Finally, according to the catalytic performance of Mn-based catalysts and the challenges faced, a possible perspective and direction for Mn-based catalysts for abating NOx and CO is proposed. And we expect that this review can serve as a reference for the catalytic treatment of NOx and CO in future studies and applications.
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Affiliation(s)
- Xiaodi Li
- College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; (X.L.); (Z.C.); (M.W.); (L.C.); (X.Y.)
| | - Shan Ren
- College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; (X.L.); (Z.C.); (M.W.); (L.C.); (X.Y.)
| | - Zhichao Chen
- College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; (X.L.); (Z.C.); (M.W.); (L.C.); (X.Y.)
| | - Mingming Wang
- College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; (X.L.); (Z.C.); (M.W.); (L.C.); (X.Y.)
| | - Lin Chen
- College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; (X.L.); (Z.C.); (M.W.); (L.C.); (X.Y.)
| | - Hongsheng Chen
- College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; (X.L.); (Z.C.); (M.W.); (L.C.); (X.Y.)
| | - Xitao Yin
- School of Physics and Optoelectronic Engineering, Ludong University, Yantai 264000, China
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Zhang X, Jin S, Liu S, Chen Y, Fang C, Wang K, Wang X, Wu X, Wang J. Low-Temperature NH 3-SCR over Hierarchical MnO x Supported on Montmorillonite Prepared by Different Methods. ACS OMEGA 2023; 8:13384-13395. [PMID: 37065025 PMCID: PMC10099437 DOI: 10.1021/acsomega.3c00718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 03/21/2023] [Indexed: 06/19/2023]
Abstract
Hierarchical MnO x pillared or supported on montmorillonite were prepared by three methods, i.e., impregnation (IM), chemical precipitation (CP), and in situ deposition (SP). The catalysts were characterized by low-temperature N2 adsorption (BET), XRD, XPS, SEM, TEM, H2-TPR, NH3-TPD, NO-TPD, TPSR, in situ DRIFTS, and evaluation of catalytic performance for NH3-SCR. The best catalytic performance was obtained for catalysts prepared by SP in terms of activity and selectivity, obtaining >90% NO conversion with >95% selectivity to N2 in 100-300 °C and GHSV of 70,000 h-1. Compared to IM and CP, SP greatly simplified catalyst preparation, resulting in higher BET surface areas; a spongy pore structure; more highly dispersed, pillared MnO x species; and higher density of acid sites distributed on catalysts surface, which all contributed to its superior performance for NH3-SCR. The activity for low-temperature NH3-SCR of manganese catalysts could be widely tailored by preparation methods.
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Affiliation(s)
- Xianlong Zhang
- School
of Chemistry and Chemical Engineering, Hefei
University of Technology, Hefei 230009, China
- Anhui
Province Key Laboratory of Advanced Catalytic Materials and Reaction
Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China
| | - Shi Jin
- School
of Chemistry and Chemical Engineering, Hefei
University of Technology, Hefei 230009, China
| | - Shiwen Liu
- School
of Chemistry and Chemical Engineering, Hefei
University of Technology, Hefei 230009, China
| | - Yazhong Chen
- School
of Chemistry and Chemical Engineering, Hefei
University of Technology, Hefei 230009, China
| | - Cheng Fang
- School
of Chemistry and Chemical Engineering, Hefei
University of Technology, Hefei 230009, China
| | - Kui Wang
- School
of Chemistry and Chemical Engineering, Hefei
University of Technology, Hefei 230009, China
| | - Xinyu Wang
- School
of Chemistry and Chemical Engineering, Hefei
University of Technology, Hefei 230009, China
| | - Xueping Wu
- School
of Chemistry and Chemical Engineering, Hefei
University of Technology, Hefei 230009, China
- Anhui
Province Key Laboratory of Advanced Catalytic Materials and Reaction
Engineering, School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China
- Engineering
Research Center of Advanced Composite Materials Design & Application
of Anhui Province, Hefei 230009, China
| | - Junwei Wang
- College
of Chemistry and Chemical Engineering, Anqing
Normal University, Anqing 246011, China
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Jia Y, Zheng R, Yuan J, Zhang X, Wang R, Gu M, Zhang S, Chen Y, Guo L. Promoting catalytic performance by balancing acid and redox sites on Mn3O4–Mn2P2O7/TiO2 for selective catalytic reduction of NO by NH3 at low temperature. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2022.112913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Zhang X, Xu Z, Jiang M, Chen S, Han Z, Liu Y, Liu Y. Enhanced activity of CuOy/TNTs doped by CeOx for catalytic ozonation of 1,2-dichloroethane at normal temperatures: performance and catalytic mechanism. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Jiang J, Ma B, Yang C, Duan X, Tang Q. Fabrication of anti-fouling and photocleaning PVDF microfiltration membranes embedded with N-TiO2 photocatalysts. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121673] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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