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Dong C, Zhang Z, Wu H, Liang X, Pang S, Wu K, Sun J, Dong X, Sun L, Gu X, Zhao C. Dual-modal imaging-guided agent based on NIR-II aggregation-induced emission luminogens with balanced phototheranostic performance. Chem Sci 2024; 15:10969-10979. [PMID: 39027299 PMCID: PMC11253120 DOI: 10.1039/d4sc01916d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Accepted: 06/07/2024] [Indexed: 07/20/2024] Open
Abstract
Phototherapy has garnered considerable interest for its potential to revolutionize conventional cancer treatment. Organic materials with near-infrared II (NIR-II, 1000-1700 nm) fluorescence and photothermal effects are key for precise tumor diagnosis and treatment, yet optimizing their output for higher resolution and reduced photodamage remains a challenge. Herein, a multifunctional NIR-II photosensitizer (LSC) has been developed using the aggregation-induced emission (AIE) technology. The utilization of thieno[3,2-b]thiophene as an electron-rich and bulky donor/acceptor bridge has allowed for the elongation of conjugation length and distortion of the AIE main chain. This strategic modification effectively enhances the electron push-pull effect, endowing the LSC with a Stokes shift of over 400 nm and AIE characteristics. We have successfully built-up stable nanoparticles called FA-LSC NPs using a nano-precipitation method. These nanoparticles exhibit high NIR-II fluorescent brightness (ε × QY = 1064 M-1 cm-1) and photothermal conversion efficiency (41%). Furthermore, the biocompatible FA-LSC NPs demonstrate effective tumor accumulation and exceptional photothermal therapeutic efficacy both in vitro and in vivo. These nanoparticles were applied to fluorescence-photothermal dual-mode imaging-guided photothermal ablation in a HeLa tumor xenograft mouse model, resulting in favorable photothermal clearance outcomes.
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Affiliation(s)
- Chengjun Dong
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology Shanghai 200237 P. R. China
| | - Ziwen Zhang
- Department of Medicinal Chemistry, School of Pharmacy, Fudan University Shanghai 201203 P. R. China
| | - Hongyu Wu
- Department of Medicinal Chemistry, School of Pharmacy, Fudan University Shanghai 201203 P. R. China
| | - Xinting Liang
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology Shanghai 200237 P. R. China
| | - Shihao Pang
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology Shanghai 200237 P. R. China
| | - Kehuan Wu
- Department of Medicinal Chemistry, School of Pharmacy, Fudan University Shanghai 201203 P. R. China
| | - Jie Sun
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology Shanghai 200237 P. R. China
| | - Xuemei Dong
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology Shanghai 200237 P. R. China
| | - Lixin Sun
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology Shanghai 200237 P. R. China
| | - Xianfeng Gu
- Department of Medicinal Chemistry, School of Pharmacy, Fudan University Shanghai 201203 P. R. China
| | - Chunchang Zhao
- Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology Shanghai 200237 P. R. China
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Khomarloo N, Mohsenzadeh E, Gidik H, Bagherzadeh R, Latifi M. Overall perspective of electrospun semiconductor metal oxides as high-performance gas sensor materials for NO x detection. RSC Adv 2024; 14:7806-7824. [PMID: 38444964 PMCID: PMC10913163 DOI: 10.1039/d3ra08119b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Accepted: 02/18/2024] [Indexed: 03/07/2024] Open
Abstract
Gas sensors based on nanostructured semiconductor metal oxide (SMO) materials have been extensively investigated as key components due to their advantages over other materials, namely, high sensitivity, stability, affordability, rapid response and simplicity. However, the difficulty of working at high temperatures, response in lower concentration and their selectivity are huge challenges of SMO materials for detecting gases. Therefore, researchers have not stopped their quest to develop new gas sensors based on SMOs with higher performance. This paper begins by highlighting the importance of nitrogen monoxide (NO) and nitrogen dioxide (NO2) detection for human health and addresses the challenges associated with existing methods in effectively detecting them. Subsequently, the mechanism of SMO gas sensors, analysis of their structure and fabrication techniques focusing on electrospinning technique, as well as their advantages, difficulties, and structural design challenges are discussed. Research on enhancing the sensing performance through tuning the fabrication parameters are summarized as well. Finally, the problems and potential of SMO based gas sensors to detect NOx are revealed, and the future possibilities are stated.
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Affiliation(s)
- Niloufar Khomarloo
- Advanced Fibrous Materials Lab (AFM-LAB), Institute for Advanced Textile Materials and Technology, Amirkabir University of Technology (Tehran Polytechnic) Iran
- Univ. Lille, ENSAIT, Laboratoire Génie et Matériaux Textile (GEMTEX) F-59000 Lille France
- Junia F-59000 Lille France
| | - Elham Mohsenzadeh
- Univ. Lille, ENSAIT, Laboratoire Génie et Matériaux Textile (GEMTEX) F-59000 Lille France
- Junia F-59000 Lille France
| | - Hayriye Gidik
- Univ. Lille, ENSAIT, Laboratoire Génie et Matériaux Textile (GEMTEX) F-59000 Lille France
- Junia F-59000 Lille France
| | - Roohollah Bagherzadeh
- Advanced Fibrous Materials Lab (AFM-LAB), Institute for Advanced Textile Materials and Technology, Amirkabir University of Technology (Tehran Polytechnic) Iran
| | - Masoud Latifi
- Textile Engineering Department, Textile Research and Excellence Centers, Amirkabir University of Technology (Tehran Polytechnic) Tehran Iran
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Nguyen TD, Roh S, Nguyen MTN, Lee JS. Structural Control of Nanofibers According to Electrospinning Process Conditions and Their Applications. MICROMACHINES 2023; 14:2022. [PMID: 38004879 PMCID: PMC10673317 DOI: 10.3390/mi14112022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 10/20/2023] [Accepted: 10/28/2023] [Indexed: 11/26/2023]
Abstract
Nanofibers have gained much attention because of the large surface area they can provide. Thus, many fabrication methods that produce nanofiber materials have been proposed. Electrospinning is a spinning technique that can use an electric field to continuously and uniformly generate polymer and composite nanofibers. The structure of the electrospinning system can be modified, thus making changes to the structure, and also the alignment of nanofibers. Moreover, the nanofibers can also be treated, modifying the nanofiber structure. This paper thoroughly reviews the efforts to change the configuration of the electrospinning system and the effects of these configurations on the nanofibers. Excellent works in different fields of application that use electrospun nanofibers are also introduced. The studied materials functioned effectively in their application, thereby proving the potential for the future development of electrospinning nanofiber materials.
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Affiliation(s)
| | | | | | - Jun Seop Lee
- Department of Materials Science and Engineering, Gachon University, 1342 Seongnam-Daero, Sujeong-Gu, Seongnam-Si 13120, Gyeonggi-Do, Republic of Korea; (T.D.N.); (S.R.); (M.T.N.N.)
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4
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Razouq H, Berger T, Hüsing N, Diwald O. Vapor phase-grown TiO 2 and ZnO nanoparticles inside electrospun polymer fibers and their calcination-induced organization. MONATSHEFTE FUR CHEMIE 2023; 154:849-856. [PMID: 37521146 PMCID: PMC10382359 DOI: 10.1007/s00706-023-03093-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Accepted: 06/14/2023] [Indexed: 08/01/2023]
Abstract
The spatial organization of metal oxide nanoparticles represents an important factor in the chemical utilization of resulting structures. For the production of networks that are composed of metal oxide nanoparticle chains, we dispersed vapor phase-grown TiO2 and ZnO nanoparticles homogeneously in an aqueous polyvinyl alcohol solution. After electrospinning, we analyzed the sizes and diameters of the compositionally homogeneous electrospun fibers and discussed the size distribution and morphology of the nanoparticles inside. Calcination-induced polymer removal gives rise to self-supported nanoparticle-based nanofibers. Particle coarsening by a factor of ~ 2 for TiO2 and ~ 3 for ZnO nanoparticles is observed. Graphical abstract
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Affiliation(s)
- Hasan Razouq
- Department of Chemistry and Physics of Materials, Paris Lodron Universität Salzburg, Jakob-Haringer Str. 2a, 5020 Salzburg, Austria
| | - Thomas Berger
- Department of Chemistry and Physics of Materials, Paris Lodron Universität Salzburg, Jakob-Haringer Str. 2a, 5020 Salzburg, Austria
| | - Nicola Hüsing
- Department of Chemistry and Physics of Materials, Paris Lodron Universität Salzburg, Jakob-Haringer Str. 2a, 5020 Salzburg, Austria
| | - Oliver Diwald
- Department of Chemistry and Physics of Materials, Paris Lodron Universität Salzburg, Jakob-Haringer Str. 2a, 5020 Salzburg, Austria
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5
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Rodaev VV, Razlivalova SS, Tyurin AI, Vasyukov VM. Electrospun Zr-Doped CaO Sorbent for CO 2 Capture. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:747. [PMID: 36839115 PMCID: PMC9964891 DOI: 10.3390/nano13040747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 02/12/2023] [Accepted: 02/14/2023] [Indexed: 06/18/2023]
Abstract
A Zr-doped CaO sorbent for high-temperature CO2 capture was fabricated using electrospinning. The nanofiber sorbent with an average filament diameter of about 160 nm is characterized by an initial CO2 uptake capacity of 12.1 mmol/g, a specific surface area of 79 m2/g, an indentation Young's modulus of 520 MPa, and a hardness of 1.6 MPa. After 50 carbonation/decarbonation cycles, the sorbent has a decent CO2 uptake capacity of 9.7 mmol/g due to the uniform distribution of CaZrO3 in the CaO nanofibers to prevent CaO grain growth caused by CaCO3 sintering. It is revealed that the sorbent CO2 uptake capacity decreases both with an increase in the decarbonation temperature and with an increase in the CO2 concentration in the gas flow upon carbonation, where the sorbent CO2 uptake capacity is more sensitive to the decarbonation temperature than to the CO2 concentration in the gaseous stream during carbonation. It is assumed that the electrospun regenerable Zr-doped CaO sorbent is effective for removing CO2 from flue gases.
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Nejadsalim A, Bashiri N, Godini HR, Oliveira RL, Tufail Shah A, Bekheet MF, Thomas A, Schomäcker R, Gurlo A, Görke O. Core-Sheath Pt-CeO 2/Mesoporous SiO 2 Electrospun Nanofibers as Catalysts for the Reverse Water Gas Shift Reaction. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:485. [PMID: 36770446 PMCID: PMC9921642 DOI: 10.3390/nano13030485] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 01/13/2023] [Accepted: 01/23/2023] [Indexed: 06/18/2023]
Abstract
One-dimensional (1D) core-sheath nanofibers, platinum (Pt)-loaded ceria (CeO2) sheath on mesoporous silica (SiO2) core were fabricated, characterized, and used as catalysts for the reverse water gas shift reaction (RWGS). CeO2 nanofibers (NFs) were first prepared by electrospinning (ES), and then Pt nanoparticles were loaded on the CeO2 NFs using two different deposition methods: wet impregnation and solvothermal. A mesoporous SiO2 sheath layer was then deposited by sol-gel process. The phase composition, structural, and morphological properties of synthesized materials were investigated by scanning electron microscope (SEM), scanning transmission electron microscopy (STEM), X-ray diffraction (XRD), nitrogen adsorption/desorption method, X-ray photoelectron spectroscopy (XPS), inductively coupled plasma-optical emission spectrometry (ICP-OES) analysis, and CO2 temperature programmed desorption (CO2-TPD). The results of these characterization techniques revealed that the core-sheath NFs with a core diameter between 100 and 300 nm and a sheath thickness of about 40-100 nm with a Pt loading of around 0.5 wt.% were successfully obtained. The impregnated catalyst, Pt-CeO2 NF@mesoporous SiO2, showed the best catalytic performance with a CO2 conversion of 8.9% at 350 °C, as compared to the sample prepared by the Solvothermal method. More than 99% selectivity of CO was achieved for all core-sheath NF-catalysts.
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Affiliation(s)
- Aidin Nejadsalim
- Chair of Advanced Ceramic Materials, Institute of Material Science and Technology, Faculty III Process Sciences, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Najmeh Bashiri
- Functional Materials, Institute of Chemistry, Faculty II Mathematics and Natural Sciences, Technische Universität Berlin, Hardenbergstr. 40, 10623 Berlin, Germany
- Chemical Engineering/Multiphase Reaction Technology, Institute of Chemistry, Faculty II Mathematics and Natural Sciences, Technische Universität Berlin, Straße des 17. Juni 124, 10623 Berlin, Germany
| | - Hamid Reza Godini
- Inorganic Membranes and Membrane Reactors, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Rafael L. Oliveira
- Low Temperature and Structure Research Institute of the Polish Academy of Science, Okólna 2, 50-422 Wroclaw, Poland
| | - Asma Tufail Shah
- Chair of Advanced Ceramic Materials, Institute of Material Science and Technology, Faculty III Process Sciences, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany
- Interdisciplinary Research Centre in Biomedical Materials, COMSATS University Islamabad Lahore Campus, Defence Road, Off-Raiwand Road, Lahore 54000, Pakistan
| | - Maged F. Bekheet
- Chair of Advanced Ceramic Materials, Institute of Material Science and Technology, Faculty III Process Sciences, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Arne Thomas
- Functional Materials, Institute of Chemistry, Faculty II Mathematics and Natural Sciences, Technische Universität Berlin, Hardenbergstr. 40, 10623 Berlin, Germany
| | - Reinhard Schomäcker
- Chemical Engineering/Multiphase Reaction Technology, Institute of Chemistry, Faculty II Mathematics and Natural Sciences, Technische Universität Berlin, Straße des 17. Juni 124, 10623 Berlin, Germany
| | - Aleksander Gurlo
- Chair of Advanced Ceramic Materials, Institute of Material Science and Technology, Faculty III Process Sciences, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Oliver Görke
- Chair of Advanced Ceramic Materials, Institute of Material Science and Technology, Faculty III Process Sciences, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany
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7
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Korotcenkov G, Tolstoy VP. Current Trends in Nanomaterials for Metal Oxide-Based Conductometric Gas Sensors: Advantages and Limitations-Part 2: Porous 2D Nanomaterials. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:237. [PMID: 36677992 PMCID: PMC9867534 DOI: 10.3390/nano13020237] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 01/01/2023] [Accepted: 01/02/2023] [Indexed: 06/17/2023]
Abstract
This article discusses the features of the synthesis and application of porous two-dimensional nanomaterials in developing conductometric gas sensors based on metal oxides. It is concluded that using porous 2D nanomaterials and 3D structures based on them is a promising approach to improving the parameters of gas sensors, such as sensitivity and the rate of response. The limitations that may arise when using 2D structures in gas sensors intended for the sensor market are considered.
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Affiliation(s)
- Ghenadii Korotcenkov
- Department of Physics and Engineering, Moldova State University, 2009 Chisinau, Moldova
| | - Valeri P. Tolstoy
- Institute of Chemistry, Saint Petersburg State University, Saint Petersburg 198504, Russia
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8
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Gungordu Er S, Kelly A, Jayasuriya SBW, Edirisinghe M. Nanofiber Based on Electrically Conductive Materials for Biosensor Applications. BIOMEDICAL MATERIALS & DEVICES (NEW YORK, N.Y.) 2022; 1:1-16. [PMID: 36415535 PMCID: PMC9668398 DOI: 10.1007/s44174-022-00050-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 10/25/2022] [Indexed: 06/16/2023]
Abstract
Biosensors are analytical tools that enable the transmission of different signals produced from the target analyte to a transducer for the production of real-time clinical diagnostic devices by obtaining meaningful results. Recent research demonstrates that the production of structured nanofiber through various methods has come to light as a potential platform for enhancing the functionality of biosensing devices. The general trend is towards the use of nanofibers for electrochemical biosensors. However, optical and mechanical biosensors are being developed by functionalization of nanofibers. Such nanofibers exhibit a high surface area to volume ratio, surface porosity, electroconductivity and variable morphology. In addition, nanosized structures have shown to be effective as membranes for immobilizing bioanalytes, offering physiologically active molecules a favorable microenvironment that improves the efficiency of biosensing. Cost effective, wearable biosensors are crucial for point of care diagnostics. This review aims to examine the electrically conductive materials, potential forming methods, and wide-ranging applications of nanofiber-based biosensing platforms, with an emphasis on transducers incorporating mechanical, electrochemical and optical and bioreceptors involving cancer biomarker, urea, DNA, microorganisms, primarily in the last decade. The appealing properties of nanofibers mats and the attributes of the biorecognition components are also stated and explored. Finally, consideration is given to the difficulties now affecting the design of nanofiber-based biosensing platforms as well as their future potential.
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Affiliation(s)
- Seda Gungordu Er
- Department of Mechanical Engineering, University College London, Torrington Place, London, WC1E 7JE UK
| | | | | | - Mohan Edirisinghe
- Department of Mechanical Engineering, University College London, Torrington Place, London, WC1E 7JE UK
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9
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Metal oxide nanofibers based chemiresistive H2S gas sensors. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214752] [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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10
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Electrospun ZnO/Pd Nanofibers as Extremely Sensitive Material for Hydrogen Detection in Oxygen Free Gas Phase. Polymers (Basel) 2022; 14:polym14173481. [PMID: 36080555 PMCID: PMC9459723 DOI: 10.3390/polym14173481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 08/21/2022] [Accepted: 08/23/2022] [Indexed: 11/17/2022] Open
Abstract
The development of safety sensors is an urgent necessity for the successful use of hydrogen in real conditions, which may differ, in particular, by the oxygen content in the surrounding atmosphere. Palladium-modified zinc oxide shows the high sensitivity when detecting hydrogen in air; however, studies of the sensor properties and the operation mechanism of the ZnO/Pd sensor when reducing gases are detected in an oxygen deficient or inert atmosphere have not been effectuated. In this work, we synthesized the ZnO and ZnO/Pd nanofibers by electrospinning and for the first time determined their sensor properties in the detection of CO, NH3 and H2 in different oxygen backgrounds. The microstructure and composition of nanofibers were characterized by electron microscopy, X-ray diffraction, X-ray fluorescent spectroscopy, and X-ray photoelectron spectroscopy. The interaction with the gas phase was investigated in situ by diffuse reflectance IR Fourier transform spectroscopy (DRIFTS). The sensor properties of ZnO and ZnO/Pd nanofibers were studied at 100–450 °C towards CO, NH3 and H2 in the N2/O2 gas mixtures containing 0.0005–20% O2. When detecting CO, a decrease in the oxygen concentration from 20 to 0.0005% in the gas phase does not lead to a significant change in the sensor response. At the same time, when detecting NH3 and especially H2, a decrease in oxygen concentration down to 0.0005% results in the dramatic increase in the sensor response of ZnO/Pd nanofibers. This result is discussed in terms of palladium hydride formation, modulation of the potential barrier at the ZnO/Pd interface, as well as changes in the concentration of donor defects and charge carriers in the ZnO matrix. Synthesized electrospun ZnO/Pd nanofibers are extremely promising materials for sensors for detecting hydrogen in an oxygen free atmosphere.
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11
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Yang Y, Wang G, Li X, Iradukunda Y, Liu F, Li Z, Gao H, Shi G. Preparation of Electrospun Active Molecules Membrane Application to Atmospheric Free Radicals. MEMBRANES 2022; 12:membranes12050480. [PMID: 35629806 PMCID: PMC9143268 DOI: 10.3390/membranes12050480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 04/27/2022] [Accepted: 04/27/2022] [Indexed: 12/04/2022]
Abstract
Atmospheric reactive oxygen species (ROS) play a key role in the process of air pollution and oxidative damage to organisms. The analysis of ROS was carried out by the capture-derivative method. Therefore, it is necessary to prepare an effective molecular membrane to trap and detect ROS. Electrospinning membranes were prepared by combining the electrospinning technique with chrysin, baicalein, scutellarin, genistein, quercetin, and baicalin. By comparing the structures of the membranes before and after the reaction, the fluorescence enhancement characteristics of the reactive molecular membranes and the atmospheric radicals were studied. The ability of the active molecular membranes to trap atmospheric radicals was also studied. It was found that the genistein active molecular membrane had good trapping ability in four environments. The fluorescence enhancement rates in ROS, OH radical and O3 simulated environments were 39.32%, 7.99% and 11.92%, respectively. The fluorescence enhancement rate in atmospheric environment was 16.16%. Indeed, the sites where the atmospheric radicals react with the active molecular membranes are discussed. It is found that it is mainly related to the 5,7 phenolic hydroxyl of ring A, catechol structure and the coexistence structure of 4′ phenolic hydroxyl of ring B and 7 phenolic hydroxyl of ring A. Therefore, the genistein molecular membrane has shown great potential in its trapping ability and it is also environmentally friendly.
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Affiliation(s)
- Yang Yang
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; (Y.Y.); (X.L.); (F.L.); (Z.L.); (H.G.); (G.S.)
| | - Guoying Wang
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; (Y.Y.); (X.L.); (F.L.); (Z.L.); (H.G.); (G.S.)
- Correspondence:
| | - Xin Li
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; (Y.Y.); (X.L.); (F.L.); (Z.L.); (H.G.); (G.S.)
| | - Yves Iradukunda
- Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China;
| | - Fengshuo Liu
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; (Y.Y.); (X.L.); (F.L.); (Z.L.); (H.G.); (G.S.)
| | - Zhiqian Li
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; (Y.Y.); (X.L.); (F.L.); (Z.L.); (H.G.); (G.S.)
| | - Hongli Gao
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; (Y.Y.); (X.L.); (F.L.); (Z.L.); (H.G.); (G.S.)
| | - Gaofeng Shi
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; (Y.Y.); (X.L.); (F.L.); (Z.L.); (H.G.); (G.S.)
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Bobkov A, Luchinin V, Moshnikov V, Nalimova S, Spivak Y. Impedance Spectroscopy of Hierarchical Porous Nanomaterials Based on por-Si, por-Si Incorporated by Ni and Metal Oxides for Gas Sensors. SENSORS (BASEL, SWITZERLAND) 2022; 22:1530. [PMID: 35214428 PMCID: PMC8877289 DOI: 10.3390/s22041530] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/08/2022] [Accepted: 02/11/2022] [Indexed: 06/14/2023]
Abstract
Approaches are being developed to create composite materials with a fractal-percolation structure based on intercalated porous matrices to increase the sensitivity of adsorption gas sensors. Porous silicon, nickel-containing porous silicon, and zinc oxide have been synthesized as materials for such structures. Using the impedance spectroscopy method, it has been shown that the obtained materials demonstrate high sensitivity to organic solvent vapors and can be used in gas sensors. A model is proposed that explains the high sensitivity and inductive nature of the impedance at low frequencies, considering the structural features and fractal-percolation properties of the obtained oxide materials.
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13
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Li J, Ding Q, Mo X, Zou Z, Cheng P, Li Y, Sun K, Fu Y, Wang Y, He D. A highly stable and sensitive ethanol sensor based on Ru-decorated 1D WO 3 nanowires. RSC Adv 2021; 11:39130-39141. [PMID: 35492475 PMCID: PMC9044460 DOI: 10.1039/d1ra06623d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 11/20/2021] [Indexed: 12/19/2022] Open
Abstract
Decorating materials with noble metal catalysts is an effective method for optimizing the sensing performance of sensors based on tungsten trioxide (WO3) nanowires. Ruthenium (Ru) exhibits excellent catalytic activity for oxygen adsorption/desorption and chemical reactions between gases and adsorbed oxygen. Herein, small Ru nanoparticles were uniformly distributed on the surface of one-dimensional WO3 nanowires. The nanowires were prepared by the electrospinning method through an ultraviolet (UV) irradiation process, and decoration with Ru did not change their morphology. A sensor based on 4% Ru nanowires (NWs) shows the highest response (∼120) to 100 ppm ethanol, which was increased around 47 times, and the lowest ethanol detection limit (221 ppb) at a lower temperature (200 °C) displays outstanding repeatability and stability even after 45 days or in higher-humidity conditions. Moreover, it also has faster response–recovery features. The improvement in the sensing performance was attributed to the stable morphology of the nanowires, the sensitization effect of Ru, the catalytic effect of RuO2 and the optimal atomic utilization efficiency. This work offers an effective and promising strategy for promoting the ethanol sensing performance of WO3. Decorating Ru does not effect the morphology of NWs, increased the oxygen vacancies, adsorbed oxygen. This strategy results in a better sensing performance (∼120 to 100 ppm ethanol was increased around 47 times at 200 °C) and humidity resistance.![]()
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Affiliation(s)
- Jianjun Li
- School of Physical Science and Technology, Lanzhou University Lanzhou 730000 China
| | - Qiongling Ding
- School of Physical Science and Technology, Lanzhou University Lanzhou 730000 China
| | - Xichao Mo
- School of Physical Science and Technology, Lanzhou University Lanzhou 730000 China
| | - Zihao Zou
- School of Materials and Energy, Lanzhou University Lanzhou 730000 China
| | - Pu Cheng
- School of Materials and Energy, Lanzhou University Lanzhou 730000 China
| | - Yiding Li
- School of Materials and Energy, Lanzhou University Lanzhou 730000 China
| | - Kai Sun
- School of Materials and Energy, Lanzhou University Lanzhou 730000 China
| | - Yujun Fu
- School of Materials and Energy, Lanzhou University Lanzhou 730000 China
| | - Yanrong Wang
- School of Physical Science and Technology, Lanzhou University Lanzhou 730000 China
| | - Deyan He
- School of Materials and Energy, Lanzhou University Lanzhou 730000 China
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