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Jia J, Giannakis S, Li D, Yan B, Lin T. Efficient and sustainable photocatalytic inactivation of E. coli by an innovative immobilized Ag/TiO 2 photocatalyst with peroxymonosulfate (PMS) under visible light. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 901:166376. [PMID: 37595906 DOI: 10.1016/j.scitotenv.2023.166376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 08/10/2023] [Accepted: 08/15/2023] [Indexed: 08/20/2023]
Abstract
A novel catalytic system for effective photocatalytic inactivation of Escherichia coli (E. coli) was constructed by anchoring Ag nanoparticles (AgNPs) on silane coupling agent (SCA) pretreated TiO2 nano-tube arrays (Ag/SCA/TiO2NTAs). Morphology and structural analyses revealed that SCA could disperse AgNPs evenly on TiO2NTAs, thus inducing a superior surface plasmon resonance (SPR) effect. Ag/SCA/TiO2NTAs catalyst exhibited excellent inactivation performance when in the presence of peroxymonosulfate (PMS) and visible light (VL), with 6-log E. coli was completely inactivated within 60 min, which was 5.3, 12.5 and 13.2 times higher than that of Ag/SCA/TiO2NTAs/VL, PMS/VL and Ag/SCA/TiO2NTAs/PMS/dark systems, respectively. Additionally, the photocatalyst exhibited a highly reusable property, with the inactivation performance almost unchanged after ten cycles of uses with minimal Ag leaching. The inactivation mechanism analysis demonstrated that both radical (SO4•-, OH) and non-radical (h+, 1O2) pathways involved in E. coli inactivation, and SCA played a pivotal role in the production of reactive species. Chloride ions (Cl-) greatly enhanced the inactivation efficiency, while bicarbonate (HCO3-) and phosphate (H2PO4-) showed an inhibitory effect. Humic acid (HA) displayed a dual effect on inactivation performance, where the low concentration of HA facilitated the bacteria inactivation, while the higher dose suppressed bacteria inactivation. Moreover, the system exhibited excellent inactivation performance in tap water. This work first used SCA as the binder to fix AgNPs on TiO2NTAs for VL photocatalytic inactivation of bacteria with the assistance of PMS, which was expected to provide some insights into the practical treatment of drinking water.
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Affiliation(s)
- Jialin Jia
- Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Hohai University, Nanjing 210098, PR China; College of Environment, Hohai University, Nanjing 210098, PR China
| | - Stefanos Giannakis
- Universidad Politécnica de Madrid, E.T.S. de Ingenieros de Caminos, Canales y Puertos, Departamento de Ingeniería Civil: Hidráulica, Energía y Medio Ambiente, Environment, Coast and Ocean Research Laboratory (ECOREL-UPM), c/ Profesor Aranguren, 3, ES-28040, Madrid, Spain.
| | - Dong Li
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, PR China
| | - Boyin Yan
- Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Hohai University, Nanjing 210098, PR China
| | - Tao Lin
- Ministry of Education Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Hohai University, Nanjing 210098, PR China; College of Environment, Hohai University, Nanjing 210098, PR China.
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Jin J, Lv K, Sun J, Zhang J, Hou Q, Guo X, Liu K. Robust Superhydrophobic TiO2@Carbon Nanotubes Inhibitor with Bombax Structure for Strengthening Wellbore in Water-based Drilling Fluid. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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Sasi S, Chandran A, Sugunan SK, Krishna AC, Nair PR, Peter A, Shaji AN, Subramanian KRV, Pai N, Mathew S. Flexible Nano-TiO 2 Sheets Exhibiting Excellent Photocatalytic and Photovoltaic Properties by Controlled Silane Functionalization-Exploring the New Prospects of Wastewater Treatment and Flexible DSSCs. ACS OMEGA 2022; 7:25094-25109. [PMID: 35910153 PMCID: PMC9330195 DOI: 10.1021/acsomega.2c01425] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
TiO2 nanoparticles surface-modified with silane moieties, which can be directly coated on a flexible substrate without the requirement of any binder materials and postsintering processes, are synthesized and characterized using X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, Brunauer-Emmett-Teller, X-ray photoelectron spectroscopy, Raman spectroscopy, photoluminescence spectroscopy, time-correlated single-photon counting, and transmission electron microscopy. The viability of the prepared surface-modified TiO2 (M-TiO2) sheets as a catalyst for the photo-induced degradation of a model dye, methylene blue, was checked using UV-visible absorption spectroscopy. The data suggest that, compared to unmodified TiO2, M-TiO2 sheets facilitate better dye-degradation, which leads to a remarkable photocatalytic activity that results in more than 95% degradation of the dye in the first 10 min and more than 99% of the degradation in the first 50 min of the photocatalytic experiments. We also demonstrate that M-TiO2 can be recycled with negligible reduction in photocatalytic activity. Further, the photovoltaic properties of the developed M-TiO2 sheets were assessed using UV-visible absorption spectroscopy, electrochemical impedance spectroscopy (EIS), and photochronoamperometry. Dye-sensitized solar cells (DSSC) fabricated using M-TiO2 as the photoanode exhibited a photoconversion efficiency of 4.1% under direct sunlight. These experiments suggested that M-TiO2 sheets show enhanced photovoltaic properties compared to unmodified TiO2 sheets, and that, when N-719 dye is incorporated, the dye-TiO2 interaction is more favorable for M-TiO2 than bare TiO2. The simple solution processing method demonstrated in this paper rendered a highly flexible photoanode made of M-TiO2 with superior charge-separation efficiency to an electrode made of bare TiO2. We propose that our findings on the photovoltaic properties of M-TiO2 open up arenas of further improvement and a wide scope for the large-scale production of flexible DSSCs on plastic substrates at room temperature in a cost-effective way.
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Affiliation(s)
- Soorya Sasi
- Advanced
Molecular Materials Research Centre, Mahatma
Gandhi University, Kottayam 686 560, Kerala, India
| | - Akash Chandran
- School
of Chemical Sciences, Mahatma Gandhi University, Priyadarshini Hills, Kottayam 686 560, Kerala, India
| | - Sunish K. Sugunan
- Department
of Chemistry, CMS College Kottayam (Autonomous)—affiliated
to Mahatma Gandhi University, Kottayam 686001, Kerala, India
| | - Ardra C Krishna
- School
of Chemical Sciences, Mahatma Gandhi University, Priyadarshini Hills, Kottayam 686 560, Kerala, India
| | | | - Aneena Peter
- School
of Chemical Sciences, Mahatma Gandhi University, Priyadarshini Hills, Kottayam 686 560, Kerala, India
| | - Arsha N. Shaji
- School
of Chemical Sciences, Mahatma Gandhi University, Priyadarshini Hills, Kottayam 686 560, Kerala, India
| | | | - Narendra Pai
- School
of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Suresh Mathew
- Advanced
Molecular Materials Research Centre, Mahatma
Gandhi University, Kottayam 686 560, Kerala, India
- School
of Chemical Sciences, Mahatma Gandhi University, Priyadarshini Hills, Kottayam 686 560, Kerala, India
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Purkayastha MD, Pal Majumder T, Sarkar M, Ghosh S. Carrier transport and shielding properties of rod-like mesoporous TiO2–SiO2 nanocomposite. Radiat Phys Chem Oxf Engl 1993 2022. [DOI: 10.1016/j.radphyschem.2021.109898] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Tang R, Yao X, Chen J, Sridar S, He X, Pu Y, Wang JX, Wang D, Wang S. A Highly Controlled Organic-Inorganic Encapsulation Nanocomposite with Versatile Features toward Wearable Device Applications. Macromol Rapid Commun 2021; 42:e2100134. [PMID: 34355445 DOI: 10.1002/marc.202100134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 05/21/2021] [Indexed: 11/06/2022]
Abstract
Ultraviolet-curable polyurethane acrylate (PUA) materials can be used in a number of important applications spanning from microfluidics, surface patterning to wearable technology. For the first time, the potential of encapsulation of modified zirconia (ZrO2 ) nanoparticles is reported in PUA-based hybrid films aimed to facilitate profoundly enhanced hardness and refractive index. By successfully manipulating the interfacial reaction conditions between ZrO2 nanoparticles and PUA film, the PUA-based nanocomposites exhibit an ultrahigh hardness of 9 and superior refractive index of 1.64 (589.3 nm). The outcomes obtained pave the way for seamless application of nanozirconia/PUA as a potent encapsulating material that provides structurally morphable, water resistant, and optically transparent light emitting diodes toward wearables devices in healthcare.
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Affiliation(s)
- Ruijie Tang
- State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Xiaoxue Yao
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, 999077, China
| | - Jingyi Chen
- Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Sreepathy Sridar
- Department of Mechanical and Construction Engineering, Faculty of Engineering and Environment, Northumbria University, Newcastle upon Tyne, NE1 8ST, UK
| | - Xianglei He
- State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Yuan Pu
- State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Jie-Xin Wang
- State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Dan Wang
- State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Steven Wang
- Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, 999077, China
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Functional nanoparticle reinforced starch-based adhesive emulsion: Toward robust stability and high bonding performance. Carbohydr Polym 2021; 269:118270. [PMID: 34294302 DOI: 10.1016/j.carbpol.2021.118270] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 05/26/2021] [Accepted: 05/27/2021] [Indexed: 11/20/2022]
Abstract
Sustainable bio-based adhesive is a promising substitute for petroleum-based adhesives to alleviate serious environmental and health problems. In this work, a nanoengineered starch-based adhesive was fabricated by grafting vinyl acetate (VAc) onto starch molecule and subsequently incorporating the functional nanoparticle [TiO2-coupling-poly(butyl acrylate, BA), TKB] to overcome the drawbacks present in conventional nanocomposite adhesive. Results showed that the presence of BA altered the surface property of TKB, leading to improved dispersion. In the adhesive with 4% (mass ratio to starch) TKB, TKB aggregates played the role as a sliding bridge, which significantly promoted the storage stability and shear strength in both dry and wet states. Additionally, the latex film with 4% TKB exhibited high compatibility and water resistance due to the promoted hydrophobicity. This study provides a fundamental insight into the improvement of functional nanoparticles on the performance of starch-based adhesive, suggesting a novel strategy for designing high-performance bio-adhesive.
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Bao Y, Zhang Y, Ma J. Reactive amphiphilic hollow SiO 2 Janus nanoparticles for durable superhydrophobic coating. NANOSCALE 2020; 12:16443-16450. [PMID: 32490864 DOI: 10.1039/d0nr02571b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Durable superhydrophobic coating is attractive due to its long-term superhydrophobicity, anti-fouling and self-cleaning properties. However, the fabrication of durable superhydrophobic coatings on a fragile surface, including leather and paper, is still a challenge due to its bad resistance to harsh environments such as high temperature, high pressure and strong acid or strong base. Herein, we developed a universal way to fabricate long-lasting superhydrophobic coating on leather via amphiphilic Janus particles, which have one of the semispheres functionalized with hydrophobic 1-dodecanethiol and the other semisphere functionalized with hydrophilic β-mercaptoethylamine. Polyurethane with isocyanate end groups was sprayed on the leather surface as an intermediate layer to strongly link Janus particles with leather via cross-linking. Moreover, amphiphilic Janus particles were fabricated from hollow SiO2 particles via a thiol-ene click reaction due to its low density. The superhydrophobic coating on leather possessed a high water contact angle of 162.2°. Furthermore, it still retained excellent hydrophobicity with a water contact angle of 154° after 140 cycles of abrasion using sandpaper. This study not only provides a novel method for the fabrication of amphiphilic hollow SiO2 Janus nanoparticles, but also resolves the difficulties in constructing long-lived superhydrophobic coatings on fragile surfaces by existing methods. Meanwhile, the present study also suggests a potential way to translocate functional Janus microcapsules, which may give some significant suggestions on the future nanoparticle design for drug delivery and energy storage.
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Affiliation(s)
- Yan Bao
- College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, P. R. China.
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TiO 2 Modified with Organic Acids for the Decomposition of Chlorfenvinphos under the Influence of Visible Light: Activity, Performance, Adsorption, and Kinetics. MATERIALS 2020; 13:ma13020289. [PMID: 31936390 PMCID: PMC7013527 DOI: 10.3390/ma13020289] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 12/30/2019] [Accepted: 01/05/2020] [Indexed: 11/16/2022]
Abstract
Photocatalytic decomposition of chlorfenvinphos (CFVP) in the presence of titanium dioxide (TiO2) modified with organic acids: pyruvic (PA) and succinic (SA) under the visible light radiation has been studied. The following tests were examined: dose of photocatalysts, adsorption time, pH of the model solution, deactivation of catalysts, the role of oxygen, identification of free radicals for the CFVP decomposition, Langmuir-Hinshelwood kinetics. The synthesized materials were characterized by Scanning Electron Microscopy (SEM) and UV-Vis. At 10 wt.% of acid (90:10) decomposition of chlorfenvinphos was the most effective in the following conditions: dose of catalyst 50.0 mg/L, time of adsorption = 20 min, pH of model solution = 3.0. Under these conditions the order of photocatalyst efficiency has been proposed: TiO2/PA/90:10 > TiO2/SA/90:10 > TiO2 with the removal degree of 85, 72 and 48%. The mathematically calculated half-life at this conditions was 27.0 min and 39.0 min for TiO2/PA/90:10 and TiO2/SA/90:10 respectively, compared to 98 min for pure TiO2. It has been determined that the O2- radicals and holes (h+) are the main reactive species involved in the photodegradation of chlorfenvinphos. The results of this study showed that method may be an interesting alternative for the treatment of chlorfenvinphos contaminated wastewater.
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Excellent corrosion protection performance of epoxy composite coatings filled with silane functionalized silicon nitride. JOURNAL OF POLYMER RESEARCH 2018. [DOI: 10.1007/s10965-018-1518-2] [Citation(s) in RCA: 115] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Bai Y, Li Z, Cheng B, Zhang M, Su K. Higher UV-shielding ability and lower photocatalytic activity of TiO2@SiO2/APTES and its excellent performance in enhancing the photostability of poly(p-phenylene sulfide). RSC Adv 2017. [DOI: 10.1039/c6ra28098f] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
U–TiO2 is successfully coated with SiO2 and subsequently well modified by APTES, and a core–shell structure exists on TiO2@SiO2 and TiO2@SiO2/APTES, which greatly reduces aggregation of the TiO2 nanoparticles.
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Affiliation(s)
- Yali Bai
- State Key Laboratory of Separation Membranes and Membrane Processes
- School of Materials Science and Engineering
- Tianjin Polytechnic University
- Tianjin
- China
| | - Zhenhuan Li
- State Key Laboratory of Separation Membranes and Membrane Processes
- School of Materials Science and Engineering
- Tianjin Polytechnic University
- Tianjin
- China
| | - Bowen Cheng
- State Key Laboratory of Separation Membranes and Membrane Processes
- School of Materials Science and Engineering
- Tianjin Polytechnic University
- Tianjin
- China
| | - Maliang Zhang
- State Key Laboratory of Separation Membranes and Membrane Processes
- School of Materials Science and Engineering
- Tianjin Polytechnic University
- Tianjin
- China
| | - Kunmei Su
- State Key Laboratory of Separation Membranes and Membrane Processes
- School of Materials Science and Engineering
- Tianjin Polytechnic University
- Tianjin
- China
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Morphology and electrical properties of poly(3,4-ethylenedioxythiophene)/titanium dioxide nanocomposites. Macromol Res 2015. [DOI: 10.1007/s13233-015-3080-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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12
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Wang X, Pang B, Zhu Q, Yu J, Dong H, Dong L. Electrical properties of acrylic resin composite thin films with graphene/silver nanowires. J Appl Polym Sci 2015. [DOI: 10.1002/app.42387] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xiaoxia Wang
- College of Materials Science and Engineering; Qingdao University of Science and Technology; Qingdao 266042 China
| | - Beili Pang
- College of Materials Science and Engineering; Qingdao University of Science and Technology; Qingdao 266042 China
| | - Qianqian Zhu
- College of Materials Science and Engineering; Qingdao University of Science and Technology; Qingdao 266042 China
| | - Jianhua Yu
- College of Materials Science and Engineering; Qingdao University of Science and Technology; Qingdao 266042 China
| | - Hongzhou Dong
- College of Materials Science and Engineering; Qingdao University of Science and Technology; Qingdao 266042 China
| | - Lifeng Dong
- College of Materials Science and Engineering; Qingdao University of Science and Technology; Qingdao 266042 China
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Hailu ST, Samant S, Grabowski C, Durstock M, Karim A, Raghavan D. Synthesis of highly dispersed, block copolymer‐grafted TiO
2
nanoparticles within neat block copolymer films. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/pola.27460] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
| | - Saumil Samant
- Department of Polymer EngineeringUniversity of AkronAkron Ohio44325
| | | | - Michael Durstock
- Air Force Research Lab, Wright‐Patterson Air Force BaseDayton Ohio45433
| | - Alamgir Karim
- Department of Polymer EngineeringUniversity of AkronAkron Ohio44325
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On the stabilization and methods for modification of nanosize particles used for the preparation of polymer-inorganic nanocomposites. Russ Chem Bull 2013. [DOI: 10.1007/s11172-013-0041-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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