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Syngouna VI, Georgopoulou MP, Bellou MI, Vantarakis A. Effect of Human Adenovirus Type 35 Concentration on Its Inactivation and Sorption on Titanium Dioxide Nanoparticles. FOOD AND ENVIRONMENTAL VIROLOGY 2024; 16:143-158. [PMID: 38308001 DOI: 10.1007/s12560-023-09582-z] [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: 08/28/2023] [Accepted: 12/30/2023] [Indexed: 02/04/2024]
Abstract
Removal of pathogenic viruses from water resources is critically important for sanitation and public health. Nanotechnology is a promising technology for virus inactivation. In this paper, the effects of titanium dioxide (TiO2) anatase nanoparticles (NPs) on human adenovirus type 35 (HAdV-35) removal under static and dynamic (with agitation) batch conditions were comprehensively studied. Batch experiments were performed at room temperature (25 °C) with and without ambient light using three different initial virus concentrations. The virus inactivation experimental data were satisfactorily fitted with a pseudo-first-order expression with a time-dependent rate coefficient. The experimental results demonstrated that HAdV-35 sorption onto TiO2 NPs was favored with agitation under both ambient light and dark conditions. However, no distinct relationships between virus initial concentration and removal efficiency could be established from the experimental data.
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Affiliation(s)
- Vasiliki I Syngouna
- Environmental Microbiology Unit, Department of Public Health, Medical School, University of Patras, 26504, Patras, Greece.
| | | | - Maria I Bellou
- Environmental Microbiology Unit, Department of Public Health, Medical School, University of Patras, 26504, Patras, Greece
| | - Apostolos Vantarakis
- Environmental Microbiology Unit, Department of Public Health, Medical School, University of Patras, 26504, Patras, Greece
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Cheng R, Xia JC, Shen LJ, Shen ZP, Shi L, Zheng X, Zheng JZ. Effect of humic acid on visible light photocatalytic inactivation of bacteriophage f2 with electrospinning Cu-TiO 2 nanofibers: insight into the mechanisms. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:30212-30227. [PMID: 38602633 DOI: 10.1007/s11356-024-33119-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 03/24/2024] [Indexed: 04/12/2024]
Abstract
Photocatalytic disinfection is a promising technology with low cost and high efficiency. However, most of the current studies on photocatalytic disinfection ignore the widespread presence of natural organic matter (NOM) in water bodies, so the incomplete conclusions obtained may not be applicable. Herein, this paper systematically studied the influence of humic acid (HA), one of the most important components of NOM, on the photocatalytic inactivation of bacteriophage f2 with electrospinning Cu-TiO2 nanofibers. We found that with the addition of HA, the light transmittance of the solution at 550 nm decreased from 94 to 60%, and the band gap of the photocatalyst was increased from 2.96 to 3.05 eV. Compared with reacting without HA, the degradation amount of RNA of f2 decreased by 88.7% after HA was added, and the RNA concentration increased from 1.95 to 4.38 ng·μL-1 after the reaction. Hence, we propose mechanisms of the effect of HA on photocatalytic disinfection: photo-shielding, passivation of photocatalysts, quenching of free radicals, and virus protection. Photo-shielding and photocatalyst passivation lead to the decrease of photocatalyst activity, and the reactive oxygen species (ROSs) (·OH, ·O2-, 1O2, H2O2) are further trapped by HA. The HA in water also can protect the shape of phage f2 and reduce the leakage of protein and the destruction of ribonucleic acid (RNA). This work provides an insight into the mechanisms for the influence of HA in photocatalytic disinfection process and a theoretical basis for its practical application.
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Affiliation(s)
- Rong Cheng
- School of Environment and Natural Resources, Renmin University of China, Beijing, 100872, China
| | - Jin-Cheng Xia
- School of Environment and Natural Resources, Renmin University of China, Beijing, 100872, China
| | - Liang-Jie Shen
- School of Environment and Natural Resources, Renmin University of China, Beijing, 100872, China
- Shougang Environment Industry Co., Ltd, Beijing, 100041, China
| | - Zhi-Peng Shen
- School of Environment and Natural Resources, Renmin University of China, Beijing, 100872, China
| | - Lei Shi
- School of Environment and Natural Resources, Renmin University of China, Beijing, 100872, China
| | - Xiang Zheng
- School of Environment and Natural Resources, Renmin University of China, Beijing, 100872, China
| | - Jian-Zhong Zheng
- School of Environmental Science and Engineering, Nanjing Tech University, Nanjing, 211816, China.
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Kim J, Lee J, Kim S, Kim T, Lee KM, Lee D, Cho J, Kim JY, Jeong YW, Park HJ, Lee JC, Lee C. Virucidal activity of Cu-doped TiO 2 nanoparticles under visible light illumination: Effect of Cu oxidation state. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133525. [PMID: 38237436 DOI: 10.1016/j.jhazmat.2024.133525] [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: 08/30/2023] [Revised: 12/25/2023] [Accepted: 01/11/2024] [Indexed: 02/08/2024]
Abstract
Copper (Cu) is an effective antimicrobial material; however, its activity is inhibited by oxidation. Titanium dioxide (TiO2) photocatalysis prevents Cu oxidation and improves its antimicrobial activity and stability. In this study, the virucidal efficacy of Cu-doped TiO2 nanoparticles (Cu-TiO2) with three different oxidation states of the Cu dopant (i.e., zero-valent Cu (Cu0), cuprous (CuI), and cupric (CuII) oxides) was evaluated for the phiX174 bacteriophage under visible light illumination (Vis/Cu-TiO2). CuI-TiO2 exhibited superior virucidal activity (5 log inactivation in 30 min) and reusability (only 11 % loss of activity in the fifth cycle) compared to Cu0-TiO2 and CuII-TiO2. Photoluminescence spectroscopy and photocurrent measurements showed that CuI-TiO2 exhibited the highest charge separation efficiency and photocurrent density (approximately 0.24 μA/cm2) among the three materials, resulting in the most active redox reactions of Cu. Viral inactivation tests under different additives and viral particle integrity analyses (i.e., protein oxidation and DNA damage analyses) revealed that different virucidal species played key roles in the three Vis/Cu-TiO2 systems; Cu(III) was responsible for the viral inactivation by Vis/CuI-TiO2. The Vis/CuI-TiO2 system exhibited substantial virucidal performance for different viral species and in different water matrices, demonstrating its potential practical applications. The findings of this study offer valuable insights into the design of effective and sustainable antiviral photocatalysts for disinfection.
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Affiliation(s)
- Joohyun Kim
- School of Chemical and Biological Engineering, Institute of Chemical Process (ICP), and Institute of Engineering Research, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Juri Lee
- School of Chemical and Biological Engineering, Institute of Chemical Process (ICP), and Institute of Engineering Research, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Sungwon Kim
- Samsung Research, Samsung Electronics Co., Ltd., Seoul 06756, Republic of Korea
| | - Taewan Kim
- School of Chemical and Biological Engineering, Institute of Chemical Process (ICP), and Institute of Engineering Research, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Ki-Myeong Lee
- School of Chemical and Biological Engineering, Institute of Chemical Process (ICP), and Institute of Engineering Research, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Donghyun Lee
- School of Chemical and Biological Engineering, Institute of Chemical Process (ICP), and Institute of Engineering Research, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Jiyoon Cho
- School of Chemical and Biological Engineering, Institute of Chemical Process (ICP), and Institute of Engineering Research, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Jee Yeon Kim
- Samsung Research, Samsung Electronics Co., Ltd., Seoul 06756, Republic of Korea
| | - Yong Won Jeong
- Samsung Research, Samsung Electronics Co., Ltd., Seoul 06756, Republic of Korea
| | - Hee-Jin Park
- Samsung Research, Samsung Electronics Co., Ltd., Seoul 06756, Republic of Korea
| | - Jong-Chan Lee
- School of Chemical and Biological Engineering, Institute of Chemical Process (ICP), and Institute of Engineering Research, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Changha Lee
- School of Chemical and Biological Engineering, Institute of Chemical Process (ICP), and Institute of Engineering Research, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea.
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Leong CY, Wahab RA, Lee SL, Ponnusamy VK, Chen YH. Current perspectives of metal-based nanomaterials as photocatalytic antimicrobial agents and their therapeutic modes of action: A review. ENVIRONMENTAL RESEARCH 2023; 227:115578. [PMID: 36848977 DOI: 10.1016/j.envres.2023.115578] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 02/04/2023] [Accepted: 02/24/2023] [Indexed: 05/08/2023]
Abstract
Efforts to restrict the emergence and progression of multidrug-resistant bacterial strains should heavily involve the scientific community, including government bodies, researchers, and industries, in developing new and effective photocatalytic antimicrobial agents. Such changes warrant the modernization and upscaling of materials synthesis laboratories to support and expedite the mass production of materials at the industrial scale for the benefit of humankind and the environment. Despite the massive volume of publications reporting the potential usage of different types of metal-based nanomaterials as antimicrobial agents, reviews uncovering the similarities and differences among the various products remain lacking. This review details the basic and unique properties of metal-based nanoparticles, their use as photocatalytic antimicrobial agents, and their therapeutic modes of action. It shall be noted that compared to traditional antibiotics, the mode of action of photocatalytic metal-based nanomaterials for killing microorganisms are completely different, despite displaying promising performance against antibiotic-resistant bacteria. Besides, this review uncovers the differences in the mode of actions of metal oxide nanoparticles against different types of bacteria, as well as towards viruses. Last but not least, this review comprehensively describes previous published clinical trials and medical usages involving contemporary photocatalytic antimicrobial agents.
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Affiliation(s)
- Cheng Yee Leong
- Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia; Centre for Sustainable Nanomaterials, Ibnu Sina Institute for Scientific and Industrial Research, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia
| | - Roswanira Abdul Wahab
- Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia; Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia
| | - Siew Ling Lee
- Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia; Centre for Sustainable Nanomaterials, Ibnu Sina Institute for Scientific and Industrial Research, Universiti Teknologi Malaysia, 81310, Johor Bahru, Johor, Malaysia.
| | - Vinoth Kumar Ponnusamy
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University (KMU), Kaohsiung City, 807, Taiwan; Research Center for Precision Environmental Medicine, Kaohsiung Medical University (KMU), Kaohsiung City, 807, Taiwan; Department of Chemistry, College of Science, National Sun Yat-Sen University (NSYSU), Kaohsiung, 80424, Taiwan; Department of Medical Research, Kaohsiung Medical University Hospital (KMUH), Kaohsiung City, 807, Taiwan; Ph.D. Program of Aquatic Science and Technology, College of Hydrosphere Science, National Kaohsiung University of Science and Technology (NKUST), Kaohsiung City, 811, Taiwan.
| | - Yi-Hsun Chen
- Division of Gastroenterology, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung 807, Taiwan.
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New type of electrospinning drug-loaded nanofiber membrane in the treatment of gallstone disease. APPLIED NANOSCIENCE 2022. [DOI: 10.1007/s13204-022-02685-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Khan J, E N, Mariatti M, Vilay V, Todo M. A comprehensive review on facemask manufacturing, testing, and its environmental impacts. JOURNAL OF INDUSTRIAL TEXTILES 2022; 52:15280837221111175. [PMID: 36249720 PMCID: PMC9548449 DOI: 10.1177/15280837221111175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The coronavirus pandemic (COVID-19) is currently the biggest threat to human lives due to its rapid transmission rate causing severe damage to human health and economy. The transmission of viral diseases can be minimized at its early stages with proper planning and preventive practices. The use of facemask has proved to be most effective measure to curb the spread of virus along with social distancing and good hygiene practices. This necessitates more research on facemask technology to increase its filtration efficiencies and proper disposal, which can be accelerated with knowledge of the current manufacturing process and recent research in this field. This review article provides an overview of the importance of facemask, fundamentals of nonwoven fabrics, and its manufacturing process. It also covers topics related to recent research reported for improved facemask efficiencies and testing methods to evaluate the performance of facemask. The plastic waste associated with the facemask and measures to minimize its effect are also briefly described. A systematic understanding is given in order to trigger future research in this field to ensure that we are well equipped for any future pandemic.
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Affiliation(s)
- Junaid Khan
- School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Nibong Tebal Penang, Malaysia
| | - Netnapa E
- School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Nibong Tebal Penang, Malaysia
| | - M Mariatti
- School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia, Nibong Tebal Penang, Malaysia
| | - V Vilay
- Department of Mechanical Engineering, Faculty of Engineering, Sokpaluang Campus, National University of Laos, Vientiane, Laos
| | - M Todo
- Renewable Energy Center, Research Institute for Applied Mechanics, Kyushu University, Fukuoka, Japan
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Dahanayake MH, Athukorala SS, Jayasundera ACA. Recent breakthroughs in nanostructured antiviral coating and filtration materials: a brief review. RSC Adv 2022; 12:16369-16385. [PMID: 35747530 PMCID: PMC9158512 DOI: 10.1039/d2ra01567f] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 04/21/2022] [Indexed: 12/11/2022] Open
Abstract
COVID-19 persists as the most challenging pandemic of the 21st century with a high rate of transmission. The main pathway of SARS-CoV-2 transmission is aerosol-mediated infection transfer through virus-laden droplets that are expelled by infected people, whereas indirect transmission occurs when contact is made with a contaminated surface. This mini review delivers an overview of the current state of knowledge, research directions, and applications by examining the most recent developments in antiviral surface coatings and filters and analyzing their efficiencies. Reusable masks and other personal protective devices with antiviral properties and self-decontamination could be valuable tools in the fight against viral spread. Moreover, antiviral surface coatings that repel pathogens by preventing adhesion or neutralize pathogens with self-sanitizing ability are assumed to be the most desirable for terminating indirect transmission of viruses. Although many nanomaterials have shown high antiviral capacities, additional research is unquestionably required to develop next-generation antiviral agents with unique characteristics to face future viral outbreaks. Types of antiviral nanofilters and coatings and their applications.![]()
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Affiliation(s)
- Madushani H. Dahanayake
- Department of Chemistry, Faculty of Science, University of Peradeniya, Sri Lanka
- National Institute of Fundamental Studies, Hanthana, Kandy, Sri Lanka
| | - Sandya S. Athukorala
- Department of Chemistry, Faculty of Science, University of Peradeniya, Sri Lanka
- Postgraduate Institute of Science, University of Peradeniya, Sri Lanka
| | - A. C. A. Jayasundera
- Department of Chemistry, Faculty of Science, University of Peradeniya, Sri Lanka
- Division of Mathematics and Science, Missouri Valley College, Marshall, MO, 65340, USA
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Manakhov AM, Sitnikova NA, Tsygankova AR, Alekseev AY, Adamenko LS, Permyakova E, Baidyshev VS, Popov ZI, Blahová L, Eliáš M, Zajíčková L, Solovieva AO. Electrospun Biodegradable Nanofibers Coated Homogenously by Cu Magnetron Sputtering Exhibit Fast Ion Release. Computational and Experimental Study. MEMBRANES 2021; 11:965. [PMID: 34940466 PMCID: PMC8708309 DOI: 10.3390/membranes11120965] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 12/03/2021] [Accepted: 12/04/2021] [Indexed: 11/30/2022]
Abstract
Copper-coated nanofibrous materials are desirable for catalysis, electrochemistry, sensing, and biomedical use. The preparation of copper or copper-coated nanofibers can be pretty challenging, requiring many chemical steps that we eliminated in our robust approach, where for the first time, Cu was deposited by magnetron sputtering onto temperature-sensitive polymer nanofibers. For the first time, the large-scale modeling of PCL films irradiation by molecular dynamics simulation was performed and allowed to predict the ions penetration depth and tune the deposition conditions. The Cu-coated polycaprolactone (PCL) nanofibers were thoroughly characterized and tested as antibacterial agents for various Gram-positive and Gram-negative bacteria. Fast release of Cu2+ ions (concentration up to 3.4 µg/mL) led to significant suppression of E. coli and S. aureus colonies but was insufficient against S. typhimurium and Ps. aeruginosa. The effect of Cu layer oxidation upon contact with liquid media was investigated by X-ray photoelectron spectroscopy revealing that, after two hours, 55% of Cu atoms are in form of CuO or Cu(OH)2. The Cu-coated nanofibers will be great candidates for wound dressings thanks to an interesting synergistic effect: on the one hand, the rapid release of copper ions kills bacteria, while on the other hand, it stimulates the regeneration with the activation of immune cells. Indeed, copper ions are necessary for the bacteriostatic action of cells of the immune system. The reactive CO2/C2H4 plasma polymers deposited onto PCL-Cu nanofibers can be applied to grafting of viable proteins, peptides, or drugs, and it further explores the versatility of developed nanofibers for biomedical applications use.
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Affiliation(s)
- Anton M. Manakhov
- Research Institute of Clinical and Experimental Lymphology—Branch of the ICG SB RAS, 2 Timakova St., 630060 Novosibirsk, Russia; (N.A.S.); (E.P.)
| | - Natalya A. Sitnikova
- Research Institute of Clinical and Experimental Lymphology—Branch of the ICG SB RAS, 2 Timakova St., 630060 Novosibirsk, Russia; (N.A.S.); (E.P.)
| | - Alphiya R. Tsygankova
- Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Acad. Lavrentiev Ave., 630090 Novosibirsk, Russia;
| | - Alexander Yu. Alekseev
- Research Institute of Virology, The Federal Research Center of Fundamental and Translational Medicine, 2 Timakova St., 630060 Novosibirsk, Russia; (A.Y.A.); (L.S.A.)
- Research Institute of Applied Ecology, Dagestan State University, Dahadaeva 21, 367000 Makhachkala, Russia
| | - Lyubov S. Adamenko
- Research Institute of Virology, The Federal Research Center of Fundamental and Translational Medicine, 2 Timakova St., 630060 Novosibirsk, Russia; (A.Y.A.); (L.S.A.)
| | - Elizaveta Permyakova
- Research Institute of Clinical and Experimental Lymphology—Branch of the ICG SB RAS, 2 Timakova St., 630060 Novosibirsk, Russia; (N.A.S.); (E.P.)
- Laboratory of Inorganic Nanomaterials, National University of Science and Technology “MISiS”, Leninsky Prospekt 4, 119071 Moscow, Russia
| | - Victor S. Baidyshev
- Department of Computer Engineering and Automated Systems Software, Katanov Khakas State University, Pr. Lenin, 90, 655017 Abakan, Russia;
| | - Zakhar I. Popov
- Laboratory of Acoustic Microscopy, Emanuel Institute of Biochemical Physics RAS, Kosygina 4, 119334 Moscow, Russia;
| | - Lucie Blahová
- Central European Institute of Technology CEITEC-BUT, Purkyňova 123, 61200 Brno, Czech Republic; (L.B.); (M.E.); (L.Z.)
| | - Marek Eliáš
- Central European Institute of Technology CEITEC-BUT, Purkyňova 123, 61200 Brno, Czech Republic; (L.B.); (M.E.); (L.Z.)
| | - Lenka Zajíčková
- Central European Institute of Technology CEITEC-BUT, Purkyňova 123, 61200 Brno, Czech Republic; (L.B.); (M.E.); (L.Z.)
- Department Condensed Matter Physics, Faculty of Science, Masaryk University, Kotlářská 2, 61137 Brno, Czech Republic
| | - Anastasiya O. Solovieva
- Research Institute of Clinical and Experimental Lymphology—Branch of the ICG SB RAS, 2 Timakova St., 630060 Novosibirsk, Russia; (N.A.S.); (E.P.)
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De Pasquale I, Lo Porto C, Dell’Edera M, Curri ML, Comparelli R. TiO2-based nanomaterials assisted photocatalytic treatment for virus inactivation: perspectives and applications. Curr Opin Chem Eng 2021; 34:100716. [DOI: 10.1016/j.coche.2021.100716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Wang N, Ferhan AR, Yoon BK, Jackman JA, Cho NJ, Majima T. Chemical design principles of next-generation antiviral surface coatings. Chem Soc Rev 2021; 50:9741-9765. [PMID: 34259262 DOI: 10.1039/d1cs00317h] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The ongoing coronavirus disease 2019 (COVID-19) pandemic has accelerated efforts to develop high-performance antiviral surface coatings while highlighting the need to build a strong mechanistic understanding of the chemical design principles that underpin antiviral surface coatings. Herein, we critically summarize the latest efforts to develop antiviral surface coatings that exhibit virus-inactivating functions through disrupting lipid envelopes or protein capsids. Particular attention is focused on how cutting-edge advances in material science are being applied to engineer antiviral surface coatings with tailored molecular-level properties to inhibit membrane-enveloped and non-enveloped viruses. Key topics covered include surfaces functionalized with organic and inorganic compounds and nanoparticles to inhibit viruses, and self-cleaning surfaces that incorporate photocatalysts and triplet photosensitizers. Application examples to stop COVID-19 are also introduced and demonstrate how the integration of chemical design principles and advanced material fabrication strategies are leading to next-generation surface coatings that can help thwart viral pandemics and other infectious disease threats.
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Affiliation(s)
- Nan Wang
- Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
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11
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Hernández-Gordillo A, Arriaga S. Mesoporous TiO 2 Monoliths Impregnated with CdS and CuO Nanoparticles for Airborne Bacteria Inactivation Under Visible Light. Catal Letters 2021; 152:629-640. [PMID: 34054251 PMCID: PMC8141277 DOI: 10.1007/s10562-021-03659-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 05/10/2021] [Indexed: 11/26/2022]
Abstract
In this work, macroscopic TiO2 monoliths are proposed to serve simultaneously as support and co-catalyst in a continuous flow photoreactor. The impregnation via one-pot of mesoporous TiO2 with CdS (m-TiO2/CdS) and CuO (m-TiO2/CuO) nanoparticles enabled the formation of photocatalytic heterojunctions retaining high specific surface area (~ 100 m2/g). The impregnated monoliths of 2-3 mm in size were employed as photocatalysts to inactivate airborne bacteria under blue light, reducing the emission of living airborne bacteria up to 0.1% and 37.7% when using m-TiO2/CdS and m-TiO2/CuO, respectively. Bacteria were characterized and quantified by flow cytometry and cell lysis was confirmed by SEM, detecting collapsed bacteria. Along 96 h of continuous photocatalysis at a flow rate of 2.2 L/min, the cell concentration presented maxima and minima due to the adsorption-desorption stages of bioaerosols over the catalysts, in concordance with thermal gravimetric analysis. The reactivation of catalysts was achieved by calcination at 400 °C, however, after a third re-cycle, the photocatalytic activity for all monoliths was practically negligible because the physicochemical surface changes hinder the adequate bioaerosol adsorption. These porous systems could emerge as promising gas-phase catalysts since the mass transport is facilitated by porosity and the release of catalyst nanoparticles is avoided by the active support, providing a safe and viable model for bioaerosols inactivation to improve indoor air quality with the use of interior lighting. Supplementary Information The online version contains supplementary material available at 10.1007/s10562-021-03659-9.
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Affiliation(s)
- Armin Hernández-Gordillo
- División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica (IPICYT), Camino a la Presa San José 2055, 78216 San Luis Potosí, México
| | - Sonia Arriaga
- División de Ciencias Ambientales, Instituto Potosino de Investigación Científica y Tecnológica (IPICYT), Camino a la Presa San José 2055, 78216 San Luis Potosí, México
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12
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An X, Erramilli S, Reinhard BM. Plasmonic nano-antimicrobials: properties, mechanisms and applications in microbe inactivation and sensing. NANOSCALE 2021; 13:3374-3411. [PMID: 33538743 PMCID: PMC8349509 DOI: 10.1039/d0nr08353d] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Bacterial, viral and fungal infections pose serious threats to human health and well-being. The continuous emergence of acute infectious diseases caused by pathogenic microbes and the rapid development of resistances against conventional antimicrobial drugs necessitates the development of new and effective strategies for the safe elimination of microbes in water, food or on surfaces, as well as for the inactivation of pathogenic microbes in human hosts. The need for new antimicrobials has triggered the development of plasmonic nano-antimicrobials that facilitate both light-dependent and -independent microbe inactivation mechanisms. This review introduces the relevant photophysical mechanisms underlying these plasmonic nano-antimicrobials, and provides an overview of how the photoresponses and materials properties of plasmonic nanostructures can be applied in microbial pathogen inactivation and sensing applications. Through a systematic analysis of the inactivation efficacies of different plasmonic nanostructures, this review outlines the current state-of-the-art in plasmonic nano-antimicrobials and defines the application space for different microbial inactivation strategies. The advantageous optical properties of plasmonic nano-antimicrobials also enhance microbial detection and sensing modalities and thus help to avoid exposure to microbial pathogens. Sensitive and fast plasmonic microbial sensing modalities and their theranostic and targeted therapeutic applications are discussed.
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Affiliation(s)
- Xingda An
- Department of Chemistry, Boston University, Boston, MA 02215, USA. and The Photonics Center, Boston University, Boston, MA 02215, USA
| | - Shyamsunder Erramilli
- Department of Physics, Boston University, Boston, MA 02215, USA and The Photonics Center, Boston University, Boston, MA 02215, USA
| | - Björn M Reinhard
- Department of Chemistry, Boston University, Boston, MA 02215, USA. and The Photonics Center, Boston University, Boston, MA 02215, USA
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13
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Li R, Cui L, Chen M, Huang Y. Nanomaterials for Airborne Virus Inactivation: A Short Review. AEROSOL SCIENCE AND ENGINEERING 2021; 5:1-11. [PMCID: PMC7596633 DOI: 10.1007/s41810-020-00080-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 10/10/2020] [Accepted: 10/14/2020] [Indexed: 05/18/2023]
Abstract
The coronavirus disease 2019 (COVID-19) that broke out at the end of 2019 spread rapidly around the world, causing a large number of deaths and serious economic losses. Previous studies showed that aerosol transmission is one of the main pathways for the spread of COVID-19, Therefore, effective control measures are urgently needed to contain the epidemic. Nanomaterials have broad-spectrum antiviral capabilities, and their inactivation for viruses in the air has been extensively studied. This review discusses antiviral nanomaterials such as metal nanomaterials, metal oxide-based nano-photocatalysts, and nonmetallic nanomaterials; summarizes their structure and chemical properties, the efficiency of inactivating viruses, the mechanism of inactivating viruses, and the application of virus purification in the air. This review provides insights on the development and application of antiviral nanomaterials, which can help control the aerosol transmission of viruses.
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Affiliation(s)
- Rong Li
- Key Laboratory of Aerosol Chemistry and Physics, State Key Laboratory of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, 710061 People’s Republic of China
- CAS Center for Excellence in Quaternary Science and Global Change, Xi’an, 710061 People’s Republic of China
- University of Chinese Academy of Sciences, Beijing, 100049 People’s Republic of China
| | - Long Cui
- Key Laboratory of Aerosol Chemistry and Physics, State Key Laboratory of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, 710061 People’s Republic of China
- CAS Center for Excellence in Quaternary Science and Global Change, Xi’an, 710061 People’s Republic of China
| | - Meijuan Chen
- School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an, 710049 People’s Republic of China
| | - Yu Huang
- Key Laboratory of Aerosol Chemistry and Physics, State Key Laboratory of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, 710061 People’s Republic of China
- CAS Center for Excellence in Quaternary Science and Global Change, Xi’an, 710061 People’s Republic of China
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Moon EW, Lee HW, Rok JH, Ha JH. Photocatalytic inactivation of viral particles of human norovirus by Cu-doped TiO 2 non-woven fabric under UVA-LED wavelengths. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 749:141574. [PMID: 32814207 DOI: 10.1016/j.scitotenv.2020.141574] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 08/07/2020] [Accepted: 08/07/2020] [Indexed: 06/11/2023]
Abstract
Metal-doped TiO2 photocatalysis are recognized as effective materials for eliminating human norovirus (HuNoVs). In recent years, the airborne transmission of viral particles of HuNoVs has been a cause for concern. In this study, we evaluated the virucidal effects of a Cu/TiO2 non-woven fabric (NWF) on viral particles of HuNoV genogroup II genotype 4 (HuNoV GII.4) under an ultraviolet A light-emitting diode (UVA-LED) source. For the optimized parameters, a multivariate statistical analysis using the Box-Behnken design (BBD) technique combined with the response surface methodology (RSM) was applied. The experimental results showed that the Cu/TiO2-based NWF degraded HuNoV viral particles in the air samples. The BBD-based RSM indicated that the optimum treatment conditions for inactivating the HuNoV GII.4 droplets with the Cu/TiO2 NWF were a 1:7.7 ratio of Cu:TiO2 and the use of a 373-nm UVA-LED source for 48.08 min. The optimal conditions for the photocatalytic efficacy in HuNoV GII.4 of Cu/TiO2 NWF were verified experimentally, giving a value of 2.89 ± 0.11 log10 genomic copies, which was the same as the predicted value (2.91611) within experimental uncertainty. This result adequately validated the predicted model and confirmed that viral particles of HuNoVs could efficiently be disinfected using Cu/TiO2 NWF stimulated by UVA-LED light.
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Affiliation(s)
- Eun Woo Moon
- Hygienic Safety and Analysis Center, World Institute of Kimchi, Gwangju 61755, Republic of Korea
| | - Hae-Won Lee
- Hygienic Safety and Analysis Center, World Institute of Kimchi, Gwangju 61755, Republic of Korea
| | - Jeong Hee Rok
- PREPOLL Co., Ltd., 74, Daejeodongseo-ro 229beonga-gil, Gangseo-gu, Busan 46719, Republic of Korea
| | - Ji-Hyoung Ha
- Hygienic Safety and Analysis Center, World Institute of Kimchi, Gwangju 61755, Republic of Korea.
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Liu Y, Huang J, Feng X, Li H. Thermal-Sprayed Photocatalytic Coatings for Biocidal Applications: A Review. JOURNAL OF THERMAL SPRAY TECHNOLOGY 2020; 30:1-24. [PMID: 38624582 PMCID: PMC7640575 DOI: 10.1007/s11666-020-01118-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 10/05/2020] [Indexed: 05/03/2023]
Abstract
There have been ever-growing demands for disinfection of water and air in recent years. Efficient, eco-friendly, and cost-effective methods of disinfection for pathogens are vital to the health of human beings. The photocatalysis route has attracted worldwide attention due to its highly efficient oxidative capabilities and sustainable recycling, which can be used to realize the disinfection purposes without secondary pollution. Though many studies have comprehensively reviewed the work about photocatalytic disinfection, including design and fabrication of photocatalytic coatings, inactivation mechanisms, or practical applications, systematic reviews about the disinfection photocatalysis coatings from fabrication to effort for practical use are still rare. Among different ways of fabricating photocatalytic materials, thermal spray is a versatile surface coating technique and competitive in constructing large-scale functional coatings, which is a most promising way for the future environmental purification, biomedical and life health applications. In this review, we briefly introduced various photocatalytic materials and corresponding inactivation mechanisms for virus, bacteria and fungus. We summarized the thermal-sprayed photocatalysts and their antimicrobial performances. Finally, we discussed the future perspectives of the photocatalytic disinfection coatings for potential applications. This review would shed light on the development and implementation of sustainable disinfection strategies that is applicable for extensive use for controlling pathogens in the near future.
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Affiliation(s)
- Yi Liu
- Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201 China
- Zhejiang Engineering Research Center for Biomedical Materials, Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201 China
| | - Jing Huang
- Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201 China
- Zhejiang Engineering Research Center for Biomedical Materials, Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201 China
| | - Xiaohua Feng
- Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201 China
- Zhejiang Engineering Research Center for Biomedical Materials, Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201 China
| | - Hua Li
- Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201 China
- Zhejiang Engineering Research Center for Biomedical Materials, Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201 China
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16
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Huang SM, Weng CH, Tzeng JH, Huang YZ, Anotai J, Yen LT, Chang CJ, Lin YT. Kinetic study and performance comparison of TiO 2-mediated visible-light-responsive photocatalysts for the inactivation of Aspergillus niger. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 692:975-983. [PMID: 31540001 DOI: 10.1016/j.scitotenv.2019.07.329] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2019] [Revised: 07/17/2019] [Accepted: 07/20/2019] [Indexed: 05/23/2023]
Abstract
Fungi are highly survived with exceptional resistance to environmental stress. Conventional fungicides are quite efficient, but the increase in use raises severe environmental problems. In this study, environmentally friendly TiO2-mediated visible-light-responsive photocatalysts, namely N-TiO2, N-T-TiO2, C-TiO2, and Pd-C-TiO2, were used to compare the performance of disinfecting a mold fungi Aspergillus niger. Key parameters, including photocatalyst dosage, the initial fungal concentration, and visible-light intensity, affecting the disinfecting process, was investigated. A new developed Light-responsive Modified Hom's (LMH) kinetic model incorporating visible-light intensity and photocatalyst light-absorption coefficient was firstly used to predict such photocatalytic process in fungal inactivation. Among the photocatalysts, Pd-C-TiO2 showed the highest inactivation performance against fungi, followed by C-TiO2, N-T-TiO2, and N-TiO2. In general, inactivation increased with increasing photocatalyst dosage and light intensity while decreased with increasing initial fungal concentration. For kinetic modeling, the LMH model supports the hypothesis that photocatalyst performance toward visible-light-driven fungal inactivation primarily depends on the light-absorption capacity of the photocatalyst. In conclusion, mold fungi Aspergillus niger are effectively disinfected by TiO2-mediated visible-light-responsive photocatalysts, and such fungal inactivation process could be predicted by LMH kinetic model.
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Affiliation(s)
- Shang-Ming Huang
- Innovation and Development Center of Sustainable Agriculture, National Chung Hsing University, Taichung 40227, Taiwan; Department of Soil and Environmental Science, National Chung Hsing University, Taichung 40227, Taiwan
| | - Chih-Huang Weng
- Department of Civil and Ecological Engineering, I-Shou University, Kaohsiung 84008, Taiwan
| | - Jing-Hua Tzeng
- Department of Soil and Environmental Science, National Chung Hsing University, Taichung 40227, Taiwan; Department of Civil and Environmental Engineering, University of Delaware, Newark, DE 19716, USA
| | - Ya-Zhen Huang
- Department of Soil and Environmental Science, National Chung Hsing University, Taichung 40227, Taiwan
| | - Jin Anotai
- Department of Environmental Engineering, King Mongkut's University of Technology Thonburi, Tungkru, Bangkok, Thailand
| | - Li-Ting Yen
- Department of Soil and Environmental Science, National Chung Hsing University, Taichung 40227, Taiwan
| | - Che-Jui Chang
- Department of Soil and Environmental Science, National Chung Hsing University, Taichung 40227, Taiwan
| | - Yao-Tung Lin
- Innovation and Development Center of Sustainable Agriculture, National Chung Hsing University, Taichung 40227, Taiwan; Department of Soil and Environmental Science, National Chung Hsing University, Taichung 40227, Taiwan.
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Chattopadhyay S, Bysakh S, Mishra PM, De G. In Situ Synthesis of Mesoporous TiO 2 Nanofibers Surface-Decorated with AuAg Alloy Nanoparticles Anchored by Heterojunction Exhibiting Enhanced Solar Active Photocatalysis. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:14364-14375. [PMID: 31593629 DOI: 10.1021/acs.langmuir.9b02361] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We designed an electrospinning synthesis protocol to obtain in situ, the mesoporous TiO2 nanofibers, which are surface-decorated with plasmonic AuAg nanoparticles (AuAg-mTNF-H). Such alloy nanoparticles are found to be partially exposed on the surface of the nanofibers. Characterization by HRTEM and EDS confirmed the formation of 1:1 AuAg alloy nanoparticles on the surface of TiO2 nanofibers with heterojunction at the interfaces. On the basis of electron microscopic characterization, we proposed that, during the formation of the nanofibers, the incorporated metal ions with surface capping of negative charges migrated toward the outer surface of the nascent fibers under the influence of high positive voltage required for electrospinning. As a result, after the subsequent thermal treatment, the crystallization of TiO2 nanofibers and the formation of alloy nanoparticles took place, leading to the formation of a deep heterojunction through partial embedment of the nanoparticles. The formation of AuAg alloy also restricted the oxidation of Ag, thus making the nanoparticles highly stable in ambient condition. Accordingly, such unique AuAg-mTNF-H photocatalyst shows strong light absorption property covering the entire range of visible wavelengths with stability. The solar light harvesting property of AuAg-mTNF-H was verified by monitoring solar light induced H2 evolution via water splitting and photodecomposition of MB. In both the cases AuAg-mTNF-H showed excellent H2 evolution and photodecomposition of dye.
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Affiliation(s)
- Shreyasi Chattopadhyay
- CSIR-Central Glass and Ceramic Research Institute , 196, Raja S. C. Mullick Road , Kolkata 700032 , India
| | - Sandip Bysakh
- CSIR-Central Glass and Ceramic Research Institute , 196, Raja S. C. Mullick Road , Kolkata 700032 , India
| | - Pravat Manjari Mishra
- Environment & Sustainability Department , CSIR-Institute of Minerals and Materials Technology , Bhubaneswar 751013 , Odisha , India
| | - Goutam De
- Institute of Nano Science and Technology , Mohali 160062 , Punjab , India
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18
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Cheng R, Kang M, Shen ZP, Shi L, Zheng X. Visible-light-driven photocatalytic inactivation of bacteriophage f2 by Cu-TiO 2 nanofibers in the presence of humic acid. J Environ Sci (China) 2019; 77:383-391. [PMID: 30573103 DOI: 10.1016/j.jes.2018.09.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Revised: 09/11/2018] [Accepted: 09/11/2018] [Indexed: 05/24/2023]
Abstract
Pathogenic viruses in drinking water are great threats to public health. Visible-light-driven photocatalysis is a promising technology for virus inactivation. However, the existing photocatalytic antiviral research studies have mostly been carried out in single-component systems, neglecting the effect of natural organic matter, which exists widely in actual water bodies. In this paper, electrospun Cu-TiO2 nanofibers were prepared as photocatalysts, and their photocatalytic antiviral performance in the presence of humic acid (HA) was comprehensively studied for the first time. The properties of the reaction mixture were measured during the reaction. In addition, the safety, reliability and stability of photocatalytic disinfection in the mixed system were evaluated. The results showed that the virus removal efficiency decreased with the increase of the HA concentration. The type of reaction solution, such as PBS buffer solution or water, did not affect the removal efficiency noticeably. Under acidic conditions, the electrostatic forces between photocatalysts and viruses were strengthened, leading to higher virus removal efficiency. As the reaction time went on, the pH value in the solution increased first and then tended to be stable, the conductivity remained stable, and the dissolved oxygen increased first and then decreased. The safety test showed that the concentration of Cu ions released into the solution was lower than specified by the international standards. No photoreactivation was observed, and the addition of HA significantly reduced the reutilization efficiency of the photocatalysts.
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Affiliation(s)
- Rong Cheng
- School of Environment & Natural Resources, Renmin University of China, Beijing 100872, China
| | - Mi Kang
- School of Environment & Natural Resources, Renmin University of China, Beijing 100872, China
| | - Zhi-Peng Shen
- School of Environment & Natural Resources, Renmin University of China, Beijing 100872, China
| | - Lei Shi
- School of Environment & Natural Resources, Renmin University of China, Beijing 100872, China
| | - Xiang Zheng
- School of Environment & Natural Resources, Renmin University of China, Beijing 100872, China.
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19
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Photocatalytic Inactivation of Bacteriophage f2 with Ag3PO4/g-C3N4 Composite under Visible Light Irradiation: Performance and Mechanism. Catalysts 2018. [DOI: 10.3390/catal8100406] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Water-borne virus pollution has caused great harm and attracted widespread attention in many countries. Visible-light-driven photocatalysis is considered as a promising process for disinfection. In this study, Ag3PO4/g-C3N4 (AgCN) composites were synthesized by hydrothermal method. The photocatalytic disinfection was investigated using bacteriophage f2 as the model virus. Moreover, the effects of pH and humic acid on photocatalytic disinfection were studied. Meanwhile, the mechanism of enhanced disinfection by Ag3PO4/g-C3N4 was systematically investigated by radical scavenger experiments. The results show that Ag3PO4 particles were uniformly distributed on g-C3N4 sheets. By means of photoluminescence spectrometer analysis, it is confirmed that a lower carrier recombination rate for Ag3PO4/g-C3N4 was achieved compared with Ag3PO3 and g-C3N4. Meanwhile, complete inactivation of f2 with concentration of 3 × 106 PFU/mL was reached within 80 min in the presence of Ag3PO4/g-C3N4 composite. The pH had little effect on removal efficiency overall, while the existence of humic acid resulted in a significant negative effect on the inactivation of f2 due to the optical shielding and absorption of humic acid. Recycling tests of Ag3PO4/g-C3N4 confirmed that Ag3PO4/g-C3N4 presented superior stability. The results from radical scavenger experiments indicated that holes (h+) and hydroxyl radicals (·OH) played important roles in photocatalytic disinfection process.
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20
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Zheng X, Shen ZP, Cheng C, Shi L, Cheng R, Yuan DH. Photocatalytic disinfection performance in virus and virus/bacteria system by Cu-TiO 2 nanofibers under visible light. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 237:452-459. [PMID: 29510364 DOI: 10.1016/j.envpol.2018.02.074] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 02/06/2018] [Accepted: 02/23/2018] [Indexed: 05/22/2023]
Abstract
The presence of pathogenic microorganisms in water is a great threat to human health, and photocatalysis is promising for disinfection. However, the research on virus inactivation with visible-light photocatalysis is still limited, especially the coexistence of virus and its host bacteria. In this study, bacteriophage f2 and its host E. coil 285 were used as the model microorganisms, and the disinfection performance of prepared Cu-TiO2 nanofibers under visible light was investigated. The result showed that the prepared Cu-TiO2 nanofibers showed a brilliant ability in terms of removing bacteriophage f2 and E. coil 285 under visible light. Series experiments indicated that the initial pH didn't affect the photocatalytic disinfection performance significantly. In the certain range, the removal efficiency of bacteriophage f2 increased with the increase of catalyst dosage, light intensity and temperature, but decreased with the increase of initial virus concentration. In virus/bacteria mixed system, bacteriophage f2 exhibited stronger resistance to photocatalytic oxidation than E. coil 285, and the removal of bacteriophage f2 was obviously affected by being mixed with E. coil 285, while the removal of E. coil 285 almost remained unchanged after being mixed with bacteriophage f2. Further research proved that competitive adsorption in mixed system played a certain role in E. coli 285 inactivation, while the free reactive oxygen species (ROSs) in the bulk phase played a crucial role in phage f2 inactivation.
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Affiliation(s)
- Xiang Zheng
- School of Environment & Natural Resources, Renmin University of China, Beijing 100872, PR China
| | - Zhi-Peng Shen
- School of Environment & Natural Resources, Renmin University of China, Beijing 100872, PR China
| | - Can Cheng
- School of Environment & Natural Resources, Renmin University of China, Beijing 100872, PR China
| | - Lei Shi
- School of Environment & Natural Resources, Renmin University of China, Beijing 100872, PR China
| | - Rong Cheng
- School of Environment & Natural Resources, Renmin University of China, Beijing 100872, PR China.
| | - Dong-Hai Yuan
- Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing 100044, PR China
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Ghafoor S, Hussain SZ, Waseem S, Arshad SN. Photo-reduction of heavy metal ions and photo-disinfection of pathogenic bacteria under simulated solar light using photosensitized TiO 2 nanofibers. RSC Adv 2018; 8:20354-20362. [PMID: 35541678 PMCID: PMC9080839 DOI: 10.1039/c8ra01237g] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 05/29/2018] [Indexed: 11/21/2022] Open
Abstract
We report the photosensitization of electrospun titania nanofibers, with a mean diameter of 195 nm, by low bandgap silver sulfide nanoparticles of 11-23 nm mean size with the aim of treating heavy metal ions and pathogenic bacteria simultaneously under simulated solar light irradiation. The 17 nm Ag2S/TiO2 nanofibers showed 90% photocatalytic reduction of Cr(vi) at pH of 3 with a pseudo-first order rate constant of 0.016 min-1 which is significantly better than the previously reported for Ag-Ag2S/TiO2 composite particles. The antibacterial capability of the Ag2S/TiO2 nanofibers was evaluated via photo-disinfection of the Gram-positive and Gram-negative bacterial strains. The smallest sized 11 nm Ag2S/TiO2 nanofiber showed the best bactericidal efficiency of 100% and 90.6% against Gram-negative E. coli and Gram-positive S. aureus after 1 h of irradiation, respectively, whereas, only 50% E. coli and 41% S. aureus were found to be inactivated in dark. Furthermore, a UV-O3 treatment of the 11 nm Ag2S/TiO2 nanofibers remarkably enhanced the antibacterial activity where 89% E. coli and 81% S. aureus were inactivated in just 10 min of the irradiation. Enhanced photocatalytic activity is attributed to the efficient charge separation and transfer and reduced electron-hole recombination induced by the effective heterojunction formation between TiO2 and the optimally sized Ag2S nanoparticles. The disinfection nature of the Ag2S nanoparticles, role of the generated hydroxyl species under irradiation, and the cell wall damage mechanism is also discussed. This study demonstrates the potential use of these multifunctional composite TiO2 nanofibers for water remediation.
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Affiliation(s)
- Samina Ghafoor
- Department of Chemistry and Chemical Engineering, Syed Babar Ali School of Science and Engineering, Lahore University of Management Sciences Lahore 54792 Pakistan
- Institute of Chemistry, University of the Punjab P. O. Box 54590 Lahore Pakistan
| | - Syed Zajif Hussain
- Department of Chemistry and Chemical Engineering, Syed Babar Ali School of Science and Engineering, Lahore University of Management Sciences Lahore 54792 Pakistan
| | - Sadia Waseem
- Institute of Chemistry, University of the Punjab P. O. Box 54590 Lahore Pakistan
| | - Salman Noshear Arshad
- Department of Chemistry and Chemical Engineering, Syed Babar Ali School of Science and Engineering, Lahore University of Management Sciences Lahore 54792 Pakistan
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Zhou Y, Liu L, Wu T, Yuan G, Li J, Ding Q, Qi F, Zhu W, OuYang X, Wang Y. Flake-like InVO4 modified TiO2 nanofibers with longer carrier lifetimes for visible-light photocatalysts. RSC Adv 2018; 8:27073-27079. [PMID: 35539980 PMCID: PMC9083276 DOI: 10.1039/c8ra04344b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 07/23/2018] [Indexed: 11/21/2022] Open
Abstract
TiO2/InVO4 nanofibers have been designed and fabricated successfully by one-pot electrospinning process, which display longer carrier lifetime (22 ns) and enhanced visible-light photocatalytic activity.
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