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Chen W, Wu B, Yao Q, Dong G, Zuo C, Zhang Y, Zhou Y, Liu Y, Zhang Z. A MXene-based multiple catalyst for highly efficient photocatalytic removal of nitrate. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:58149-58160. [PMID: 35364786 DOI: 10.1007/s11356-022-19616-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 03/03/2022] [Indexed: 06/14/2023]
Abstract
Photocatalytic removal of nitrate in wastewater has attracted wide attention because of its simple operation and environmental protection. However, the preparation of photocatalysts with high efficiency and high nitrogen selectivity is still a challenge. In this paper, TiO2 is grown in situ on Ti3C2 MXene by a simple calcination method and modified with silver particles. The presence of Ti3C2 reduces the recombination rate of photogenerated electrons and generates more photogenerated electrons. At the same time, the silver particles also increase the photoelectron density and further improve the carrier separation of the catalyst. Due to its unique structure and optical properties, the prepared photocatalyst shows an excellent nitrate removal rate under a high-pressure mercury lamp. At 500 mgN/L, the nitrate removal rate reaches 96.1%, and the nitrogen selectivity reaches 92.6%. Even after 5 cycles, the prepared photocatalyst still maintains a high nitrate photocatalytic removal efficiency (89%). The electron transfer path is verified by density functional theory calculations.
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Affiliation(s)
- Wanying Chen
- School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing, 211189, People's Republic of China
| | - Bo Wu
- Multiscale Computational Materials Facility, Key Laboratory of Eco-Materials Advanced Technology, College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350100, China
| | - Qingzhao Yao
- School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing, 211189, People's Republic of China.
| | - Guomeng Dong
- School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing, 211189, People's Republic of China
| | - Changjiang Zuo
- School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing, 211189, People's Republic of China
| | - Yiwei Zhang
- School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing, 211189, People's Republic of China
| | - Yuming Zhou
- School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing, 211189, People's Republic of China
- Multiscale Computational Materials Facility, Key Laboratory of Eco-Materials Advanced Technology, College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350100, China
| | - Yang Liu
- Varun Water Environmental Technology Co., Ltd, Taicang, 215400, China
| | - Zewu Zhang
- School of Chemistry and Chemical Engineering, Southeast University, Jiangsu Optoelectronic Functional Materials and Engineering Laboratory, Nanjing, 211189, People's Republic of China
- School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing, Jiangsu Province, 211167, China
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Weng Z, Zhao Z, Jiang H, Fang Y, Lei W, Liu C. Evolution and modulation of Ag filament dynamics within memristive devices based on necklace-like Ag@TiO 2nanowire networks. NANOTECHNOLOGY 2022; 33:135203. [PMID: 34915460 DOI: 10.1088/1361-6528/ac43e8] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Accepted: 12/16/2021] [Indexed: 06/14/2023]
Abstract
Random nanowire networks (NWNs) are regarded as promising memristive materials for applications in information storage, selectors, and neuromorphic computing. The further insight to understand their resistive switching properties and conduction mechanisms is crucial to realize the full potential of random NWNs. Here, a novel planar memristive device based on necklace-like structure Ag@TiO2NWN is reported, in which a strategy only using water to tailor the TiO2shell on Ag core for necklace-like core-shell structure is developed to achieve uniform topology connectivity. With analyzing the influence of compliance current on resistive switching characteristics and further tracing evolution trends of resistance state during the repetitive switching cycles, two distinctive evolution trends of low resistance state failure and high resistance state failure are revealed, which bear resemblance to memory loss and consolidation in biological systems. The underlying conduction mechanisms are related to the modulation of the Ag accumulation dynamics inside the filaments at cross-point junctions within conductive paths of NWNs. An optimizing principle is then proposed to design reproducible and reliable threshold switching devices by tuning the NWN density and electrical stimulation. The optimized threshold switching devices have a high ON/OFF ratio of ∼107with threshold voltage as low as 0.35 V. This work will provide insights into engineering random NWNs for diverse functions by modulating external excitation and optimizing NWN parameters to satisfy specific applications, transforming from neuromorphic systems to threshold switching devices as selectors.
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Affiliation(s)
- Zhengjin Weng
- Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, People's Republic of China
| | - Zhiwei Zhao
- Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, People's Republic of China
| | - Helong Jiang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, People's Republic of China
| | - Yong Fang
- Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, People's Republic of China
| | - Wei Lei
- Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, People's Republic of China
| | - Changsheng Liu
- Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, People's Republic of China
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Chen JL, Liu MM, Xie SY, Yue LJ, Gong FL, Chai KM, Zhang YH. Cu2O-loaded TiO2 heterojunction composites for enhanced photocatalytic H2 production. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131294] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Fu X, Li S, Wen J, Kang F, Huang C, Zheng X. Visible light-induced photo-Fenton dehydration of fructose into 5-hydroxymethylfurfural over ZnFe2O4-coated Ag nanowires. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2020.125685] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Alshammari K, Niu Y, Palmer RE, Dimitratos N. Optimization of sol-immobilized bimetallic Au-Pd/TiO 2 catalysts: reduction of 4-nitrophenol to 4-aminophenol for wastewater remediation. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2020; 378:20200057. [PMID: 32623991 DOI: 10.1098/rsta.2020.0057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/06/2020] [Indexed: 06/11/2023]
Abstract
A sol-immobilization method is used to synthesize a series of highly active and stable AuxPd1-x/TiO2 catalysts (where x = 0, 0.13, 0.25, 0.5, 0.75, 0.87 and 1) for wastewater remediation. The catalytic performance of the materials was evaluated for the catalytic reduction of 4-nitrophenol, a model wastewater contaminant, using NaBH4 as the reducing agent under mild reaction conditions. Reaction parameters such as substrate/metal and substrate/reducing agent molar ratios, reaction temperature and stirring rate were investigated. Structure-activity correlations were studied using a number of complementary techniques including X-ray powder diffraction, X-ray photoelectron spectroscopy and transmission electron microscopy. The sol-immobilization route provides very small Au-Pd alloyed nanoparticles, with the highest catalytic performance shown by the Au0.5Pd0.5/TiO2 catalyst. This article is part of a discussion meeting issue 'Science to enable the circular economy'.
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Affiliation(s)
- Khaled Alshammari
- School of Chemistry, Cardiff Catalysis Institute (CCI), Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, UK
| | - Yubiao Niu
- College of Engineering, Swansea University, Bay Campus, Fabian Way, Swansea SA1 8EN, UK
| | - Richard E Palmer
- College of Engineering, Swansea University, Bay Campus, Fabian Way, Swansea SA1 8EN, UK
| | - Nikolaos Dimitratos
- School of Chemistry, Cardiff Catalysis Institute (CCI), Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, UK
- Dipartimento Chimica Industriale 'Toso Montanari', Universita degli Studi di Bologna, Viale Risorgimento 4, 40136, Bologna, Italy
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Zheng X, Fu W, Kang F, Peng H, Wen J. Enhanced photo-Fenton degradation of tetracycline using TiO2-coated α-Fe2O3 core–shell heterojunction. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2018.07.024] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Carboxylic acid-functionalized cadmium sulfide/graphitic carbon nitride composite photocatalyst with well-combined interface for sulfamethazine degradation. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.05.030] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Xiao G, Chen W, Tian F, Richardson JJ, Tardy BL, Liu M, Joshi NS, Guo J. Thermal Transition of Bimetallic Metal-Phenolic Networks to Biomass-Derived Hierarchically Porous Nanofibers. Chem Asian J 2018; 13:972-976. [PMID: 29470840 DOI: 10.1002/asia.201800284] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Indexed: 01/22/2023]
Abstract
The development and utilization of biomass resources could contribute to new materials for long-term sustainable energy storage and environmental applications, reduce environmental impacts, and meet the urgent need for green and sustainable development strategies. Herein, a bimetallic metal-phenolic network (MPN) was applied to incorporate different metallic element species into cattle skin and fabricate collagen-fiber-derived complex oxide nanofibers using natural polyphenols (Myrica tannins). Direct thermal transition of these biomass-MPN composites generates hierarchically porous nanofibers possessing micro- and mesoporous architectures along with a well-preserved macroscopic structure. The pore system and complex oxide composition provide excellent photocatalytic performance. This low-cost, simple, and readily scalable MPN-based approach provides a straightforward route to synthesize nanostructured materials directly from biomass, which could play important roles in a wide range of potential applications.
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Affiliation(s)
- Gao Xiao
- Department of Environmental Science and Engineering, College of Environment and Resources, Fuzhou University, Fuzhou, 350108, China.,Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA.,Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Wei Chen
- Department of Environmental Science and Engineering, College of Environment and Resources, Fuzhou University, Fuzhou, 350108, China
| | - Fan Tian
- Department of Applied Mathematics and Statistics, Johns Hopkins University, Baltimore, Maryland, 21287, USA
| | - Joseph J Richardson
- Department of Materials Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Blaise L Tardy
- Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, P. O. Box 16300, 00076, Finland
| | - Minghua Liu
- Department of Environmental Science and Engineering, College of Environment and Resources, Fuzhou University, Fuzhou, 350108, China
| | - Neel S Joshi
- Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA
| | - Junling Guo
- Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA
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Construction of hollow waxberry-like rutile-/anatase-TiO2/SnO2 towards enhanced photocatalysis. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2017.09.037] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Manning HG, Biswas S, Holmes JD, Boland JJ. Nonpolar Resistive Switching in Ag@TiO 2 Core-Shell Nanowires. ACS APPLIED MATERIALS & INTERFACES 2017; 9:38959-38966. [PMID: 29027461 DOI: 10.1021/acsami.7b10666] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Nonpolar resistive switching (RS), a combination of bipolar and unipolar RS, is demonstrated for the first time in a single nanowire (NW) system. Exploiting Ag@TiO2 core-shell (CS) NWs synthesized by postgrowth shell formation, the switching mode is controlled by adjusting the current compliance effectively, tailoring the electrical polarity response. We demonstrate ON/OFF ratios of 105 and 107 for bipolar and unipolar modes, respectively. In the bipolar regime, retention times could be controlled up to 103 s, and in the unipolar mode, >106 s was recorded. We show how the unique dual-mode switching behavior is enabled by the defect-rich polycrystalline material structure of the TiO2 shell and the interaction between the Ag core and the Ag electrodes. These results provide a foundation for engineering nonpolar RS behaviors for memory storage and neuromorphic applications in CSNW structures.
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Affiliation(s)
| | - Subhajit Biswas
- School of Chemistry, University College Cork , Cork T12 YN60, Ireland
| | - Justin D Holmes
- School of Chemistry, University College Cork , Cork T12 YN60, Ireland
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Highly synergistic antimicrobial activity of spherical and flower-like hierarchical titanium dioxide/silver composites. J Colloid Interface Sci 2017; 504:448-456. [DOI: 10.1016/j.jcis.2017.05.111] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Revised: 05/27/2017] [Accepted: 05/29/2017] [Indexed: 11/21/2022]
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12
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Chen H, Cao S, Yao J, Jiang F. Fabrication of Ag nanowires–CdS–Au photocatalyst and its excellent visible light photocatalytic activity: The role of synergetic electron transfer. J Taiwan Inst Chem Eng 2017. [DOI: 10.1016/j.jtice.2016.12.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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