1
|
Du F, Shen H, Liu Y, Jiang C. Investigation of the main factor affecting the NO x distribution in the street canyon with the photo-catalytic wall. ENVIRONMENTAL TECHNOLOGY 2024:1-20. [PMID: 38955510 DOI: 10.1080/09593330.2024.2371078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 06/06/2024] [Indexed: 07/04/2024]
Abstract
To find out the most contaminated street region and protect the pedestrian with the photo-catalytic equipment to decrease the hazard of oxynitride (NOx), Computational Fluid Dynamics (CFD) simulation could be used to research the main factor affecting the statistical characteristics of the oxynitride distribution in the urban street canyon with the photo-catalytic building walls. Additionally, the connection was investigated and focused on the swirling flow and oxynitride concentration to find out the root of the main factor affecting oxynitride distribution. The simulation results showed that there was one three-dimensional swirling flow in the whole canyon and the statistical concentration was straightforwardly related to the swirling or whirling flow structure (such as eddy). The characteristics had been confirmed that the whirling flow structure affected the complex oxynitride distribution in the street canyon with the photo-catalytic building walls. Furthermore, one formula was found which described the oxynitride concentration constrained by the street canyon. This study illustrated that different sections in the canyon had various patterns of the whirling flow structure (swirling flow) and oxynitride. In the symmetrical portion of the street canyon (in the middle of the street length), there is one concise equation to describe the NOx concentration affected by the turbulence intensity. Moreover, the equation was presented as CR = 1.094 + 0.11e-I, where I was the turbulence intensity and CR was the oxynitride relative concentration in the street canyon.
Collapse
Affiliation(s)
- Fangli Du
- School of Energy and Architecture, Xi'an Aeronautical University, Xi'an, People's Republic of China
| | - Huiyuan Shen
- School of Energy and Architecture, Xi'an Aeronautical University, Xi'an, People's Republic of China
| | - Yanhua Liu
- School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, People's Republic of China
| | - Chao Jiang
- School of Architectural Engineering, Chang'an University, Xi'an, People's Republic of China
| |
Collapse
|
2
|
Hao L, Li Z, Yli-Juuti T, Ylisirniö A, Pullinen I, Miettinen P, Xu W, Lehto VP, Worsnop DR, Virtanen A. Direct mitigation of secondary organic aerosol particulate pollutants by multiphase photocatalysis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 923:171323. [PMID: 38438031 DOI: 10.1016/j.scitotenv.2024.171323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 02/05/2024] [Accepted: 02/26/2024] [Indexed: 03/06/2024]
Abstract
Particulate matter represents one of the most severe air pollutants globally. Organic aerosol (OA) comprises 30-70 % of submicron particle mass in urban areas. An effective way to mitigate OA particulate pollutants is to reduce the formation of secondary organic aerosol (SOA). Here, we studied the effect of titanium dioxide (TiO2) photocatalytic seeds on the formation and mitigation of SOA particles from α-pinene or toluene oxidation in chamber. For the first time, we discovered that under ultraviolet (UV) irradiation, the presence of TiO2 directly removed internally mixed α-pinene SOA mass by 53.7 % within 200 mins, and also directly removed SOA matter in an externally mixed state that is not in direct contact with TiO2 surface: the mass of externally mixed α-pinene SOA was reduced by 21.9 % within 81 mins, and the toluene SOA mass was reduced by 46.6 % in 145mins. In addition, the presence of TiO2 effectively inhibited the formation of SOA particles with a SOA mass yield of zero. This study brings up an innovative concept for air pollution control - the direct photocatalytic degradation of OA with aid of TiO2-based photocatalysts. Our novel findings will potentially bring practical applications in air pollution abatement and regional, even global aerosol-climate interactions.
Collapse
Affiliation(s)
- Liqing Hao
- Department of Technical Physics, University of Eastern Finland, Kuopio, Finland.
| | - Zijun Li
- Department of Technical Physics, University of Eastern Finland, Kuopio, Finland
| | - Taina Yli-Juuti
- Department of Technical Physics, University of Eastern Finland, Kuopio, Finland
| | - Arttu Ylisirniö
- Department of Technical Physics, University of Eastern Finland, Kuopio, Finland
| | - Iida Pullinen
- Department of Technical Physics, University of Eastern Finland, Kuopio, Finland
| | - Pasi Miettinen
- Department of Technical Physics, University of Eastern Finland, Kuopio, Finland
| | - Wujun Xu
- Department of Technical Physics, University of Eastern Finland, Kuopio, Finland
| | - Vesa-Pekka Lehto
- Department of Technical Physics, University of Eastern Finland, Kuopio, Finland
| | - Douglas R Worsnop
- Department of Technical Physics, University of Eastern Finland, Kuopio, Finland; Department of Physics, University of Helsinki, P.O. 64, Finland; Aerodyne Research, Inc., Billerica, MA 08121-3976, USA
| | - Annele Virtanen
- Department of Technical Physics, University of Eastern Finland, Kuopio, Finland
| |
Collapse
|
3
|
Mousavi SM, Pouramini Z, Babapoor A, Binazadeh M, Rahmanian V, Gholami A, Omidfar N, Althomali RH, Chiang WH, Rahman MM. Photocatalysis air purification systems for coronavirus removal: Current technologies and future trends. CHEMOSPHERE 2024; 353:141525. [PMID: 38395369 DOI: 10.1016/j.chemosphere.2024.141525] [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: 12/03/2023] [Revised: 02/20/2024] [Accepted: 02/21/2024] [Indexed: 02/25/2024]
Abstract
Air pollution causes extreme toxicological repercussions for human health and ecology. The management of airborne bacteria and viruses has become an essential goal of air quality control. Existing pathogens in the air, including bacteria, archaea, viruses, and fungi, can have severe effects on human health. The photocatalysis process is one of the favorable approaches for eliminating them. The oxidative nature of semiconductor-based photocatalysts can be used to fight viral activation as a green, sustainable, and promising approach with significant promise for environmental clean-up. The photocatalysts show wonderful performance under moderate conditions while generating negligible by-products. Airborne viruses can be inactivated by various photocatalytic processes, such as chemical oxidation, toxicity due to the metal ions released from photocatalysts composed of metals, and morphological damage to viruses. This review paper provides a thorough and evaluative analysis of current information on using photocatalytic oxidation to deactivate viruses.
Collapse
Affiliation(s)
- Seyyed Mojtaba Mousavi
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taiwan
| | - Zahra Pouramini
- Department of Civil and Environmental Engineering, Tarbiat Modares University, Tehran, Iran
| | - Aziz Babapoor
- Department of Chemical Engineering, University of Mohaghegh Ardabil, Ardabil, Iran
| | - Mojtaba Binazadeh
- Department of Chemical Engineering, School of Chemical and Petroleum Engineering, Shiraz University, Mollasadra Street, 71345, Shiraz, Fars, Iran
| | - Vahid Rahmanian
- Department of Mechanical Engineering, Université du Québec à Trois-Rivières, Drummondville, QC, Canada.
| | - Ahmad Gholami
- Biotechnology Research Center, Shiraz University of Medical Science, Shiraz, 71439-14693, Iran
| | - Navid Omidfar
- Department of Pathology, Shiraz University of Medical Science, Shiraz, 71439-14693, Iran
| | - Raed H Althomali
- Department of Chemistry, College of Art and Science, Prince Sattam Bin Abdulaziz University, Wadi Al-Dawasir, 11991, Saudi Arabia
| | - Wei-Hung Chiang
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taiwan.
| | - Mohammed M Rahman
- Center of Excellence for Advanced Materials Research (CEAMR) & Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, 21589, P.O.Box 80203, Saudi Arabia.
| |
Collapse
|
4
|
Yang Z, Xiong X, Yan X, Luo S, Zhang Y, Briseghella B, Marano GC. NO x degradation ability of S-g-C 3N 4/MgAl-CLDH nanocomposite and its potential application in cement-based materials. RSC Adv 2023; 13:21510-21520. [PMID: 37469967 PMCID: PMC10352702 DOI: 10.1039/d3ra04243j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Accepted: 07/12/2023] [Indexed: 07/21/2023] Open
Abstract
In this study a new photocatalytic nanocomposite, S-g-C3N4/MgAl-CLDH, was synthesized and implemented into cement mortar by internal mixing or coating. The photocatalytic NOx degradation efficiency of the S-g-C3N4/MgAl-CLDH and photocatalytic mortar was investigated. The NOx degradation efficiency and photoluminescence spectra of S-g-C3N4/MgAl-CLDH after being immersed in the simulated concrete pore solution were evaluated to assess its chemical stability. The results show that compared with S-g-C3N4, the S-g-C3N4/MgAl-CLDH exhibits a narrower bandgap (2.45 eV), a lower photogenerated electron-hole pair recombination rate and a higher specific surface area (36.86 m2 g-1). After 21 min of visible light irradiation, the NOx degradation rate of S-g-C3N4/MgAl-CLDH achieves 100% as compared to merely 81.5% of S-g-C3N4. After being submerged in simulated concrete pore solution, the S-g-C3N4/MgAl-CLDH exhibits only a slight decrease of 5% in degradation rate after 12 min of irradiation, confirming a good compatibility and stability in cement-based materials. The NOx degradation ability of the internally mixed mortar is enhanced with an increase in the dosage of S-g-C3N4/MgAl-CLDH. For coated mortar, in contrast, a decline in NOx degradation rate is observed after 5 layers of coating owing to the lower porosity of mortar after excessive coating.
Collapse
Affiliation(s)
- Zhengxian Yang
- Joint International Research Laboratory of Deterioration and Control of Costal and Marine Infrastructures and Materials, College of Civil Engineering, Fuzhou University Fuzhou 350108 China
| | - Xiaoli Xiong
- Joint International Research Laboratory of Deterioration and Control of Costal and Marine Infrastructures and Materials, College of Civil Engineering, Fuzhou University Fuzhou 350108 China
| | - Xueyuan Yan
- Joint International Research Laboratory of Deterioration and Control of Costal and Marine Infrastructures and Materials, College of Civil Engineering, Fuzhou University Fuzhou 350108 China
| | - Shengyang Luo
- Joint International Research Laboratory of Deterioration and Control of Costal and Marine Infrastructures and Materials, College of Civil Engineering, Fuzhou University Fuzhou 350108 China
| | - Yong Zhang
- Joint International Research Laboratory of Deterioration and Control of Costal and Marine Infrastructures and Materials, College of Civil Engineering, Fuzhou University Fuzhou 350108 China
| | - Bruno Briseghella
- Joint International Research Laboratory of Deterioration and Control of Costal and Marine Infrastructures and Materials, College of Civil Engineering, Fuzhou University Fuzhou 350108 China
| | - Giuseppe Carlo Marano
- Department of Structural, Geotechnical and Building Engineering, Politecnico di Torino Corso Duca degli Abruzzi 24-10129 Torino Italy
| |
Collapse
|
5
|
Wei Y, Wu Q, Meng H, Zhang Y, Cao C. Recent advances in photocatalytic self-cleaning performances of TiO 2-based building materials. RSC Adv 2023; 13:20584-20597. [PMID: 37441042 PMCID: PMC10333809 DOI: 10.1039/d2ra07839b] [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: 12/08/2022] [Accepted: 04/17/2023] [Indexed: 07/15/2023] Open
Abstract
TiO2-based photocatalytic building materials can keep the building surface clean, and have decontamination, antibacterial effects and so on, which greatly reduces the maintenance cost and the risk of cleaning work, and these materials have great application potential in pollution and carbon reduction in the future. However, due to the wide band gap of TiO2, the low utilization of solar energy and the instability of super hydrophilicity have always been the difficulties in the field of photocatalysis. Based on the relevant research of TiO2-based photocatalytic materials in recent years, this review summarizes the modification strategies that can effectively improve the photocatalytic activity of TiO2-based photocatalytic materials. At the same time, the influence of complex environmental factors and substrate properties on the self-cleaning behavior of TiO2-based building materials was analyzed. This paper aims to provide effective guidance for the future application of TiO2-based photocatalysts in the construction field, improve people's understanding of photocatalytic building materials (PBM) and photocatalytic self-cleaning characteristics, and provide more possibilities for the extensive application of photocatalysis technology in the construction field, as well as to promote the realization of global carbon neutrality and other strategic goals of pollution and carbon reduction.
Collapse
Affiliation(s)
- Yuanchen Wei
- Longhua District Bureau of Public Works of Shenzhen Municipality Shenzhen 518028 China
| | - Que Wu
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology Guangzhou 510006 China
| | - Hong Meng
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology Guangzhou 510006 China
| | - Yongqing Zhang
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, South China University of Technology Guangzhou 510006 China
| | - Changlu Cao
- Longhua District Bureau of Public Works of Shenzhen Municipality Shenzhen 518028 China
| |
Collapse
|
6
|
Bathla A, Younis SA, Kim KH, Li X. TiO 2-based catalytic systems for the treatment of airborne aromatic hydrocarbons. MATERIALS HORIZONS 2023; 10:1559-1579. [PMID: 36799148 DOI: 10.1039/d2mh01583h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Among diverse strategies to manage air quality, catalytic oxidation has been a widely used option to mitigate diverse pollutants such as aromatic volatile organic compounds (VOCs), especially benzene, toluene, and xylene (BTX). For such applications, TiO2-based catalysts have drawn significant research attention for their prominent photo/thermal catalytic activities and photochemical stability. This review has been organized to elaborate on the recent developments achieved in the thermocatalytic, photocatalytic, and photothermal applications of metal/non-metal doped TiO2 catalysts towards BTX vapors and their reaction mechanisms. The performance of the reported TiO2-based catalysts has also been analyzed based on multiple computational metrics such as reaction rate (r), quantum yield (QY), space-time yield, and figure of merit (FOM). At last, the research gap and prospects in the catalytic treatment of BTX are also discussed in association with the feasibility and utility of TiO2-based catalysts in air purification applications.
Collapse
Affiliation(s)
- Aadil Bathla
- Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul 04763, South Korea.
| | - Sherif A Younis
- Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul 04763, South Korea.
- Analysis and Evaluation Department, Egyptian Petroleum Research Institute, Nasr City, Cairo 11727, Egypt
| | - Ki-Hyun Kim
- Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul 04763, South Korea.
| | - Xiaowei Li
- School of Environmental and Chemical Engineering, Organic Compound Pollution Control Engineering, Ministry of Education, Shanghai University, Shanghai 200444, P. R. China
| |
Collapse
|
7
|
Chen H, Hu Y, Ying Z, Xia Y, Ye J, Zhao J, Zhang S. BiOI-SnO 2 Heterojunction Design to Boost Visible-Light-Driven Photocatalytic NO Purification. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:4009. [PMID: 36901018 PMCID: PMC10001884 DOI: 10.3390/ijerph20054009] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 02/20/2023] [Accepted: 02/22/2023] [Indexed: 05/28/2023]
Abstract
The efficient, stable, and selective photocatalytic conversion of nitric oxide (NO) into harmless products such as nitrate (NO3-) is greatly desired but remains an enormous challenge. In this work, a series of BiOI/SnO2 heterojunctions (denoted as X%B-S, where X% is the mass portion of BiOI compared with the mass of SnO2) were synthesized for the efficient transformation of NO into harmless NO3-. The best performance was achieved by the 30%B-S catalyst, whose NO removal efficiency was 96.3% and 47.2% higher than that of 15%B-S and 75%B-S, respectively. Moreover, 30%B-S also exhibited good stability and recyclability. This enhanced performance was mainly caused by the heterojunction structure, which facilitated charge transport and electron-hole separation. Under visible light irradiation, the electrons gathered in SnO2 transformed O2 to ·O2- and ·OH, while the holes generated in BiOI oxidized H2O to produce ·OH. The abundantly generated ·OH, ·O2-, and 1O2 species effectively converted NO to NO- and NO2-, thus promoting the oxidation of NO to NO3-. Overall, the heterojunction formation between p-type BiOI and n-type SnO2 significantly reduced the recombination of photo-induced electron-hole pairs and promoted the photocatalytic activity. This work reveals the critical role of heterojunctions during photocatalytic degradation and provides some insight into NO removal.
Collapse
Affiliation(s)
- Han Chen
- Key Laboratory for Technology in Rural Water Management of Zhejiang Province, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China
| | - Yutao Hu
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Zanyun Ying
- College of Science & Technology, Ningbo University, Ningbo 315212, China
| | - Yinfeng Xia
- Key Laboratory for Technology in Rural Water Management of Zhejiang Province, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China
| | - Jiexu Ye
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Jingkai Zhao
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Shihan Zhang
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| |
Collapse
|
8
|
Abd Rahman N, Choong CE, Pichiah S, Nah IW, Kim JR, Oh SE, Yoon Y, Choi EH, Jang M. Recent advances in the TiO2 based photoreactors for removing contaminants of emerging concern in water. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2022.122294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
9
|
Fan H, Frank ES, Tobias DJ, Grassian VH. Interactions of limonene and carvone on titanium dioxide surfaces. Phys Chem Chem Phys 2022; 24:23870-23883. [PMID: 36165087 DOI: 10.1039/d2cp03021g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Limonene, a monoterpene, found in cleaning products and air fresheners can interact with a variety of surfaces in indoor environments. An oxidation product of limonene, carvone, has been reported to cause contact allergens. In this study, we have investigated the interactions of limonene and carvone with TiO2, a component of paint and self-cleaning surfaces, at 297 ± 1 K with FTIR spectroscopy and force field-based molecular dynamics and ab initio simulations. The IR absorption spectra and computational methods show that limonene forms π-hydrogen bonds with the surface O-H groups on the TiO2 surface and that carvone adsorbs on the TiO2 surface through a variety of molecular interactions including through carbonyl oxygen atoms with Ti4+ surface atoms, O-H hydrogen bonding (carbonyl O⋯HO) and π-hydrogen bonds with surface O-H groups. Furthermore, we investigated the effects of relative humidity (RH) on the adsorption of limonene and carvone on the TiO2 surface. The spectroscopic results show that the adsorbed limonene can be completely displaced by water at a relative humidity of ca. 50% RH (∼2 MLs of water) and that 25% of carvone is displaced at ca. 67% RH, which agrees with the calculated free energies of adsorption which show carvone more strongly adsorbs on the surface relative to limonene and thus would be harder to displace from the surface. Overall, this study shows how a monoterpene and its oxidation product interact with TiO2 and the impact of relative humidity on these interactions.
Collapse
Affiliation(s)
- Hanyu Fan
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, USA.
| | - Elianna S Frank
- Department of Chemistry, University of California, Irvine, California 92697, USA.
| | - Douglas J Tobias
- Department of Chemistry, University of California, Irvine, California 92697, USA.
| | - Vicki H Grassian
- Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, California 92093, USA.
| |
Collapse
|
10
|
Preparation and Real World Applications of Titania Composite Materials for Photocatalytic Surface, Air, and Water Purification: State of the Art. INORGANICS 2022. [DOI: 10.3390/inorganics10090139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The semiconducting transition metal oxide TiO2 is a rather cheap and non-toxic material with superior photocatalytic properties. TiO2 thin films and nanoparticles are known to have antibacterial, antiviral, antifungal, antialgal, self, water, and air-cleaning properties under UV or sun light irradiation. Based on these excellent qualities, titania holds great promises in various fields of applications. The vast majority of published field and pilot scale studies are dealing with the modification of building materials or generally focus on air purification. Based on the reviewed papers, for the coating of glass, walls, ceilings, streets, tunnels, and other large surfaces, titania is usually applied by spray-coating due to the scalibility and cost-efficiency of this method compared to alternative coating procedures. In contrast, commercialized applications of titania in medical fields or in water purification are rarely found. Moreover, in many realistic test scenarios it becomes evident that the photocatalytic activity is often significantly lower than in laboratory settings. In this review, we will give an overview on the most relevant real world applications and commonly applied preparation methods for these purposes. We will also look at the relevant bottlenecks such as visible light photocatalytic activity and long-term stability and will make suggestions to overcome these hurdles for a widespread usage of titania as photocalyst.
Collapse
|
11
|
A Study on the Evaluation Methods of Nitrogen Oxide Removal Performance of Photocatalytic Concrete for Outdoor Applications. Catalysts 2022. [DOI: 10.3390/catal12080846] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
In Korea, the issue of particulate matter pollution is growing, and many solutions are being developed to deal with it. Photocatalytic technology has been found to be helpful in removing precursors such as nitrogen oxides that cause particulate matter. In a microcosm setup, ISO 22197-1 has been successfully used to quantify the removal of nitrogen oxides from the specimen to which the photocatalyst is applied. However, owing to a lack of suitable tools, on-site measurement of real-scale efficacy is difficult. Depending on the substrate and surrounding circumstances at the application location, the photocatalyst may function at varying levels. Additionally, the expected photocatalytic effect may differ depending on the ambient air quality and sunlight irradiation intensity. This article describes two approaches for studying outdoor concrete photocatalysis. Standard gas measurement and dual-reactor measurement are the recommended evaluation approaches. The standard gas measurement method was found useful for assessing the applied photocatalyst itself as an outcome of field assessment. The performance of photocatalysts at different sites was found to be mutually exclusive and comparable. Over 180 min, on a building roof deck, the NO removal by the standard gas method was 0.68 ppm, whereas, at two shaded locations, the removal amount was 0.51 ppm (side wall) and 0.24 ppm (underpass) for 300 min. The dual reactor measurement approach, on the other hand, was discovered to be one of the most suitable methods for assessing how much of an improvement there has been in the air quality in areas where photocatalysts have been placed.
Collapse
|
12
|
Odhiambo VO, Le Ba T, Kónya Z, Cserháti C, Erdélyi Z, C Naomi M, Miklós Szilágyi I. Preparation of TiO2–MoO3 composite nanofibers by water-based electrospinning process and their application in photocatalysis. MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING 2022. [DOI: 10.1016/j.mssp.2022.106699] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
13
|
Liu G, Xia H, Niu Y, Yan M, Li H, Song L. Preparation and performance of photocatalytic NO degradation superhydrophobic coatings for tunnel. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:53420-53432. [PMID: 35288852 DOI: 10.1007/s11356-022-19653-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Accepted: 03/04/2022] [Indexed: 06/14/2023]
Abstract
Due to the semi-closed structure of the tunnel, serious air pollution in tunnels from vehicle exhaust becomes an issue which needed to be addressed. Among the exhaust, nitric oxide (NO) is typically considered as one of the main pollutants. In this paper, a superhydrophobic photocatalytic coating was fabricated by a spraying method by airbrush with a WO3/TiO2 photocatalysis for NO degradation. The water advanced contact angle (WACA) of the coating reached 166.32°, and the WACA was still above 145° after the 30 times abrasion test. The coating exhibited an excellent ability to remove inorganic and organic pollutants. Also, the NO degradation efficiency of this superhydrophobic coating under ultraviolet and visible light sources and humid environments was tested. When the relative humidity reached 98%, the NO degradation efficiency of the coating remained unchanged under visible light irradiation compared with the relative humidity of 45%. In addition, the coating exhibited prominent stability of NO degradation during the cyclic test. Furthermore, the WT coating showed stability and synergy of self-cleaning and photocatalysis toward NO degradation, which ensured the long-term use of the coating. Finally, a synergistic mechanism for self-cleaning and photocatalysis was proposed. This may provide a new idea and support for the application of photocatalytic technology in the degradation of NO in the tunnel.
Collapse
Affiliation(s)
- Guanyu Liu
- Engineering Research Center of Transportation Materials of Ministry of Education, School of Materials Science and Engineering, Chang'an University, Xi'an, 710064, China
| | - Huiyun Xia
- Engineering Research Center of Transportation Materials of Ministry of Education, School of Materials Science and Engineering, Chang'an University, Xi'an, 710064, China.
| | - Yanhui Niu
- Engineering Research Center of Transportation Materials of Ministry of Education, School of Materials Science and Engineering, Chang'an University, Xi'an, 710064, China.
| | - Minjie Yan
- Engineering Research Center of Transportation Materials of Ministry of Education, School of Materials Science and Engineering, Chang'an University, Xi'an, 710064, China
| | - Hao Li
- Engineering Research Center of Transportation Materials of Ministry of Education, School of Materials Science and Engineering, Chang'an University, Xi'an, 710064, China
| | - Lifang Song
- Engineering Research Center of Transportation Materials of Ministry of Education, School of Materials Science and Engineering, Chang'an University, Xi'an, 710064, China
| |
Collapse
|
14
|
The Role of Metal Nanoparticles in Promoting Photocatalysis by TiO 2. Top Curr Chem (Cham) 2022; 380:17. [PMID: 35237896 PMCID: PMC8891105 DOI: 10.1007/s41061-022-00373-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 01/25/2022] [Indexed: 12/02/2022]
Abstract
In this review, we highlight the role played by metal nanoparticles (NPs) in photocatalytic oxidation with titania as a support. This is presented in two parts, namely, partial photo-oxidation in which an organic sacrificial agent is oxidised in anaerobic conditions to produce hydrogen (photo-reforming), and photo-oxidative mineralisation of organics in aerobic conditions. We present some rules for such reactions that dictate which organic molecules can react readily, and which metals are likely to be useful for such reactions. Generally, the presence of metal NPs enhances enormously the ability of titania to yield hydrogen from photo-reforming, and a wide range of molecules can be used, including biomass. The metal NPs most used are those that are easily reduced, that is, the precious metals. The large enhancement in rate seen with metal for hydrogen production is not so extreme for the oxidation reactions, but is still significant. An important factor in all of this catalysis is the nature of the interaction between the metal NPs, which can play a multiplicity of chemical and electronic roles, and the photoactive support. A sharp dependency of rate on loading of metal is found, with maximum rates at ~0.5–2 wt% loading, depending on the metal used. The source of this dependency is the bifunctional nature of the system, in which the intimacy of both materials is crucial to performance. This rate variation is linked to the interface between the two, which is then linked to the size of the metal NPs. In fact, the rate is proportional to an area adjacent to the metal particles that we call the expanding photocatalytic area and overlap (EPAO) kinetic model. This model describes the dependence well. Rising rates with increasing coverage of particles is associated with increase in this total area but, at the maximum, these areas overlap and at higher loadings the available active area diminishes, reproducing the observed behaviour well.
Collapse
|
15
|
Kalidhasan S, Lee HY. Preparation of TiO 2-deposited silica-based catalysts for photocatalytic decomposition of chloro-pesticide to environmentally less toxic species. CHEMOSPHERE 2022; 290:133300. [PMID: 34914956 DOI: 10.1016/j.chemosphere.2021.133300] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 12/10/2021] [Accepted: 12/12/2021] [Indexed: 06/14/2023]
Abstract
Herein, titanium (IV) oxide (TiO2) loaded into montmorillonite (MK10) and sand is presented as an efficient heterogeneous catalyst for the degradation of 1,4-dichlorobenzene (DCB) as a model organic pollutant in the aqueous phase. The catalyst was synthesized by incorporating titanium isopropoxide as a precursor into MK10 through a simple solvent impregnation method, followed by direct calcination. The same protocol was applied to a clean quartz matrix. The resulting catalysts were characterized in detail using a variety of techniques. The TiO2 deposited MK10 and sand exhibited photochemical removal of DCB (>99% of 100 mg L-1) from the aqueous phase; this process followed a pseudo second-order kinetic model values in the range of Qe:111-113 mg g-1 and K2: 4-5 × 10-4 g mg-1 min-1. The kinetic plots indicate that after 30 min, the intermediates start to decrease and complete degradation occurs in 180 min. The modified materials showed fast DCB degradation kinetics under photochemical reaction conditions and adsorption under dark reaction conditions. The unmodified matrix adsorbed 99.12-99.88% of the DCB under both dark and light reaction conditions. These photocatalysts are stable, reusable, and least amount of titanium leaching. The simple two step synthesis, and high photocatalytic performance (with 10 mg of the catalyst without any oxidants) of our catalysts can be promising in environmental applications to treat similar organic pollutants in wastewater. These catalysts have enhanced activity and durability for environmental catalytic pollutant degradation reactions and can provide insights beyond single metal oxide catalysts for heterogeneous catalysis at diverse operating conditions.
Collapse
Affiliation(s)
- Sethu Kalidhasan
- Department of Chemical Engineering, The Kumoh National Institute of Technology, 61, Daehak-ro, Gumi-si, Gyeongsangbuk-do, 39177, Republic of Korea; Department of Earth and Planetary Sciences, Weizmann Institute of Science, 234 Herzl Street, POB 234, Rehovot, 7610001, Israel.
| | - Hee-Young Lee
- Department of Chemical Engineering, The Kumoh National Institute of Technology, 61, Daehak-ro, Gumi-si, Gyeongsangbuk-do, 39177, Republic of Korea.
| |
Collapse
|
16
|
Tegze B, Albert E, Dikó B, Nagy N, Rácz A, Sáfrán G, Sulyok A, Hórvölgyi Z. Effect of Silver Modification on the Photoactivity of Titania Coatings with Different Pore Structures. NANOMATERIALS 2021; 11:nano11092240. [PMID: 34578555 PMCID: PMC8466528 DOI: 10.3390/nano11092240] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 08/25/2021] [Accepted: 08/26/2021] [Indexed: 01/12/2023]
Abstract
Nanostructured photoactive systems are promising for applications such as air and water purification, including self-cleaning coatings. In this study, mesoporous TiO2 sol-gel coatings with different pore structures were prepared and modified with silver by two methods: the "mixing" method by adding AgNO3 to the precursor sol, and the "impregnation" method by immersing the samples in AgNO3 solution (0.03 and 1 M) followed by heat treatment. Our aim was to investigate the effects that silver modification has on the functional properties (e.g., those that are important for self-cleaning coatings). Transmittance, band gap energy, refractive index, porosity and thickness values were determined from UV-Vis spectroscopy measurements. Silver content and structure of the silver modified samples were characterized by X-ray photoelectron spectroscopy, Rutherford backscattering spectrometry, High-resolution transmission electron microscopy and Energy Dispersive X-ray Spectrometry elemental mapping measurements. Wettability properties, including photoinduced wettability conversion behavior were investigated by water contact angle measurements. Photoactivity was studied under both UV and visible light with rhodamine 6G and methylene blue dye molecules, at the liquid-solid and air-solid interfaces modeling the operating conditions of self-cleaning coatings. Samples made with "impregnation" method showed better functional properties, in spite of their significantly lower silver content. The pore structure influenced the Ag content achieved by the "impregnation" method, and consequently affected their photoactivity.
Collapse
Affiliation(s)
- Borbála Tegze
- Centre for Colloid Chemistry, Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1521 Budapest, Hungary; (B.T.); (E.A.); (B.D.)
| | - Emőke Albert
- Centre for Colloid Chemistry, Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1521 Budapest, Hungary; (B.T.); (E.A.); (B.D.)
| | - Boglárka Dikó
- Centre for Colloid Chemistry, Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1521 Budapest, Hungary; (B.T.); (E.A.); (B.D.)
| | - Norbert Nagy
- Centre for Energy Research, Institute of Technical Physics and Materials Science, H-1121 Budapest, Hungary; (N.N.); (A.R.); (G.S.); (A.S.)
| | - Adél Rácz
- Centre for Energy Research, Institute of Technical Physics and Materials Science, H-1121 Budapest, Hungary; (N.N.); (A.R.); (G.S.); (A.S.)
| | - György Sáfrán
- Centre for Energy Research, Institute of Technical Physics and Materials Science, H-1121 Budapest, Hungary; (N.N.); (A.R.); (G.S.); (A.S.)
| | - Attila Sulyok
- Centre for Energy Research, Institute of Technical Physics and Materials Science, H-1121 Budapest, Hungary; (N.N.); (A.R.); (G.S.); (A.S.)
| | - Zoltán Hórvölgyi
- Centre for Colloid Chemistry, Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1521 Budapest, Hungary; (B.T.); (E.A.); (B.D.)
- Correspondence:
| |
Collapse
|
17
|
Self-Cleaning Coatings and Surfaces of Modern Building Materials for the Removal of Some Air Pollutants. MATERIALS 2021; 14:ma14092161. [PMID: 33922766 PMCID: PMC8123039 DOI: 10.3390/ma14092161] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 04/20/2021] [Accepted: 04/21/2021] [Indexed: 11/17/2022]
Abstract
Air quality is one of the most important problems of the modern world, as it determines human health and changes occurring in other elements of nature, including climate change. For this reason, actions are taken to reduce the amount of harmful substances in the air. One such action is the use of building materials with special properties achieved by the application of self-cleaning coatings and photocatalytic additives. This article presents achievements in the field of additives and modifiers for building materials, whose task is to improve air quality. Concrete, cement, paints, and facade coatings modified based on the achievements of nanotechnology have been analyzed in terms of new properties and the possibility of their application in the area of modern environmental requirements. Both positive aspects and doubts were described in the scope of the effective reduction of the amount of gases such as VOC, NOx, dust and microorganisms.
Collapse
|
18
|
Facile Use of Silver Nanoparticles-Loaded Alumina/Silica in Nanofluid Formulations for Enhanced Catalytic Performance toward 4-Nitrophenol Reduction. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18062994. [PMID: 33803950 PMCID: PMC7999000 DOI: 10.3390/ijerph18062994] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 03/01/2021] [Accepted: 03/05/2021] [Indexed: 11/27/2022]
Abstract
The introduction of toxic chemicals into the environment can result in water pollution leading to the degradation of biodiversity as well as human health. This study presents a new approach of using metal oxides (Al2O3 and SiO2) modified with a plasmonic metal (silver, Ag) nanoparticles (NPs)-based nanofluid (NF) formulation for environmental remediation purposes. Firstly, we prepared the Al2O3 and SiO2 NFs of different concentrations (0.2 to 2.0 weight %) by ultrasonic-assisted dispersion of Al2O3 and SiO2 NPs with water as the base fluid. The thermo-physical (viscosity, activation energy, and thermal conductivity), electrical (AC conductivity and dielectric constant) and physical (ultrasonic velocity, density, refractive index) and stability characteristics were comparatively evaluated. The Al2O3 and SiO2 NPs were then catalytically activated by loading silver NPs to obtain Al2O3/SiO2@Ag composite NPs. The catalytic reduction of 4-nitrophenol (4-NP) with Al2O3/SiO2@Ag based NFs was followed. The catalytic efficiency of Al2O3@Ag NF and SiO2@Ag NF, for the 4-NP catalysis, is compared. Based on the catalytic rate constant evaluation, the catalytic reduction efficiency for 4-NP is found to be superior for 2% weight Al2O3@Ag NF (92.9 × 10−3 s−1) as compared to the SiO2@Ag NF (29.3 × 10−3 s−1). Importantly, the enhanced catalytic efficiency of 2% weight Al2O3@Ag NF for 4-NP removal is much higher than other metal NPs based catalysts reported in the literature, signifying the importance of NF formulation-based catalysis.
Collapse
|
19
|
Hegyi A, Lăzărescu AV, Szilagyi H, Grebenişan E, Goia J, Mircea A. Influence of TiO 2 Nanoparticles on the Resistance of Cementitious Composite Materials to the Action of Bacteria. MATERIALS 2021; 14:ma14051074. [PMID: 33669089 PMCID: PMC7956814 DOI: 10.3390/ma14051074] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 02/11/2021] [Accepted: 02/23/2021] [Indexed: 01/12/2023]
Abstract
The formation of biofilms on cementitious building surfaces can cause visible discoloration and premature deterioration, and it can also represent a potential health threat to building occupants. The use of embedded biofilm-resistant photoactivated TiO2 nanoparticles at low concentrations in the cementitious composite matrix is an effective method to increase material durability and reduce maintenance costs. Zone of inhibition studies of TiO2-infused cementitious samples showed efficacy toward both Gram-negative and Gram-positive bacteria.
Collapse
Affiliation(s)
- Andreea Hegyi
- NIRD URBAN-INCERC Cluj-Napoca Branch, 117 Calea Florești, 400524 Cluj-Napoca, Romania; (A.H.); (H.S.); (E.G.)
| | - Adrian-Victor Lăzărescu
- NIRD URBAN-INCERC Cluj-Napoca Branch, 117 Calea Florești, 400524 Cluj-Napoca, Romania; (A.H.); (H.S.); (E.G.)
- Correspondence: (A.-V.L.); (A.M.)
| | - Henriette Szilagyi
- NIRD URBAN-INCERC Cluj-Napoca Branch, 117 Calea Florești, 400524 Cluj-Napoca, Romania; (A.H.); (H.S.); (E.G.)
| | - Elvira Grebenişan
- NIRD URBAN-INCERC Cluj-Napoca Branch, 117 Calea Florești, 400524 Cluj-Napoca, Romania; (A.H.); (H.S.); (E.G.)
| | - Jana Goia
- Municipal Hospital, 14–16 1 Mai Street, 405200 Dej, Romania;
| | - Andreea Mircea
- Facultatea de Construcţii, Technical University of Cluj-Napoca, 28 Memorandumului, 400114 Cluj-Napoca, Romania
- Correspondence: (A.-V.L.); (A.M.)
| |
Collapse
|
20
|
Efficient Photocatalytic Degradation of Gaseous Benzene and Toluene over Novel Hybrid PIL@TiO2/m-GO Composites. Catalysts 2021. [DOI: 10.3390/catal11010126] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
In this work, the PIL (poly ionic liquid)@TiO2 composite was designed with two polymerized ionic liquid concentrations (low and high) and evaluated for pollutant degradation activity for benzene and toluene. The results showed that PIL (low)@TiO2 composite was more active than PIL (high)@TiO2 composites. The photodegradation rate of benzene and toluene pollutants by PIL (low)@TiO2 and PIL (high)@TiO2 composites was obtained as 86% and 74%, and 59% and 46%, respectively, under optimized conditions. The bandgap of TiO2 was markedly lowered (3.2 eV to 2.2 eV) due to the formation of PIL (low)@TiO2 composite. Besides, graphene oxide (GO) was used to grow the nano-photocatalysts’ specific surface area. The as-synthesized PIL (low)@TiO2@GO composite showed higher efficiency for benzene and toluene degradation which corresponds to 91% and 83%, respectively. The resultant novel hybrid photocatalyst (PIL@TiO2/m-GO) was prepared and appropriately characterized for their microstructural, morphology, and catalytic properties. Among the studied photocatalysts, the PIL (low)@TiO2@m-GO composite exhibits the highest activity in the degradation of benzene (97%) and toluene (97%). The ultimate bandgap of the composite reached 2.1 eV. Our results showed that the as-prepared composites hold an essential role for future considerations over organic pollutants.
Collapse
|
21
|
Gopalan AI, Lee JC, Saianand G, Lee KP, Chun WY, Hou YL, Kannan V, Park SS, Kim WJ. Cost-Effective Production of TiO 2 with 90-Fold Enhanced Photocatalytic Activity Via Facile Sequential Calcination and Ball Milling Post-Treatment Strategy. MATERIALS 2020; 13:ma13225072. [PMID: 33182834 PMCID: PMC7696072 DOI: 10.3390/ma13225072] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 10/28/2020] [Accepted: 11/06/2020] [Indexed: 11/25/2022]
Abstract
Titanium dioxide (TiO2), the golden standard among the photocatalysts, exhibits a varying level of photocatalytic activities (PCA) amongst the synthetically prepared and commercially available products. For commercial applications, superior photoactivity and cost-effectiveness are the two main factors to be reckoned with. This study presents the development of simple, cost-effective post-treatment processes for a less costly TiO2 to significantly enhance the PCA to the level of expensive commercial TiO2 having demonstrated superior photoactivities. We have utilized sequential calcination and ball milling (BM) post-treatment processes on a less-costlier KA100 TiO2 and demonstrated multi-fold (nearly 90 times) enhancement in PCA. The post-treated KA100 samples along with reference commercial samples (P25, NP400, and ST01) were well-characterized by appropriate instrumentation and evaluated for the PCA considering acetaldehyde photodegradation as the model reaction. Lattice parameters, phase composition, crystallite size, surface functionalities, titanium, and oxygen electronic environments were evaluated. Among post-treated KA100, the sample that is subjected to sequential 700 °C calcination and BM (KA7-BM) processes exhibited 90-fold PCA enhancement over pristine KA100 and the PCA-like commercial NP400 (pure anatase-based TiO2). Based on our results, we attribute the superior PCA for KA7-BM due to the smaller crystallite size, the co-existence of mixed anatase-srilankite-rutile phases, and the consequent multiphase heterojunction formation, higher surface area, lattice disorder/strain generation, and surface oxygen environment. The present work demonstrates a feasible potential for the developed post-treatment strategy towards commercial prospects.
Collapse
Affiliation(s)
- Anantha-Iyengar Gopalan
- School of Architecture and Civil Engineering, Daegyeong Regional Infrastructure Technology Development Center, Kyungpook National University, Daegu 41566, Korea; (A.-I.G.); (K.-P.L.)
| | - Jun-Cheol Lee
- Department of Architecture, Seowon University, Cheongju 28674, Korea;
| | - Gopalan Saianand
- Global Centre for Environmental Remediation (GCER), Faculty of Science, The University of Newcastle, Callaghan 2308, NSW, Australia;
| | - Kwang-Pill Lee
- School of Architecture and Civil Engineering, Daegyeong Regional Infrastructure Technology Development Center, Kyungpook National University, Daegu 41566, Korea; (A.-I.G.); (K.-P.L.)
| | - Woo-Young Chun
- Real-scale Fire Testing; Research Center, Korea Conformity Laboratories, 33-72, Eonjang 1-Gil, Samcheok-si, Gangwon-do 25913, Korea;
| | - Yao-long Hou
- Department of Civil Engineering, Kyungpook National University, 80 Daehakro, Buk-gu, Daegu 41566, Korea; (Y.-l.H.); (S.-S.P.)
| | | | - Sung-Sik Park
- Department of Civil Engineering, Kyungpook National University, 80 Daehakro, Buk-gu, Daegu 41566, Korea; (Y.-l.H.); (S.-S.P.)
| | - Wha-Jung Kim
- School of Architecture and Civil Engineering, Daegyeong Regional Infrastructure Technology Development Center, Kyungpook National University, Daegu 41566, Korea; (A.-I.G.); (K.-P.L.)
- Correspondence: ; Tel.: +82-53-950-6335
| |
Collapse
|
22
|
Zhang J, Yang C, Li S, Xi Y, Cai C, Liu W, Golosov D, Zavadski S, Melnikov S. Preparation of Fe 3+ Doped High-Ordered TiO 2 Nanotubes Arrays with Visible Photocatalytic Activities. NANOMATERIALS 2020; 10:nano10112107. [PMID: 33114091 PMCID: PMC7690816 DOI: 10.3390/nano10112107] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2020] [Revised: 10/21/2020] [Accepted: 10/21/2020] [Indexed: 11/16/2022]
Abstract
In this paper, the Fe3+ doped rutile phase TiO2 nanotubes arrays (NTAs) were prepared in a low temperature water-assistant crystallization method. It is noteworthy that the Fe3+ doping hardly hinders either the crystallization of rutile TiO2 NTAs or the highly-ordered nanotubular morphologies. Moreover, Fe3+ did not form other compound impurities, which indicated that Fe3+ substitute Ti4+ into the lattice of TiO2. With the introduction of Fe3+, the light absorption range of TiO2 NTAs extends from the ultraviolet band to the visible light range. Photocatalytic testing results indicate that Fe3+ doped TiO2 NTAs can effectively improve the degradation rate of methyl orange aqueous solution in visible light, and the TiO2 NTAs with 0.2 mol/L Fe3+ doping exhibits the highest photocatalytic degradation efficiency.
Collapse
Affiliation(s)
- Jin Zhang
- Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, School of Optoelectronic Engineering, Xi’an Technological University, Xi’an 710032, China; (C.Y.); (S.L.); (Y.X.); (C.C.); (W.L.)
- Correspondence:
| | - Chen Yang
- Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, School of Optoelectronic Engineering, Xi’an Technological University, Xi’an 710032, China; (C.Y.); (S.L.); (Y.X.); (C.C.); (W.L.)
| | - Shijie Li
- Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, School of Optoelectronic Engineering, Xi’an Technological University, Xi’an 710032, China; (C.Y.); (S.L.); (Y.X.); (C.C.); (W.L.)
| | - Yingxue Xi
- Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, School of Optoelectronic Engineering, Xi’an Technological University, Xi’an 710032, China; (C.Y.); (S.L.); (Y.X.); (C.C.); (W.L.)
| | - Changlong Cai
- Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, School of Optoelectronic Engineering, Xi’an Technological University, Xi’an 710032, China; (C.Y.); (S.L.); (Y.X.); (C.C.); (W.L.)
| | - Weiguo Liu
- Shaanxi Province Key Laboratory of Thin Films Technology and Optical Test, School of Optoelectronic Engineering, Xi’an Technological University, Xi’an 710032, China; (C.Y.); (S.L.); (Y.X.); (C.C.); (W.L.)
| | - Dmitriy Golosov
- Belarusian State University of Informatics and Radioelectronics, Electronic Technique and Technology Department, Center 10.1, Thin Film Research Laboratory, 6 P. Brovka str., 220013 Minsk, Belarus; (D.G.); (S.Z.); (S.M.)
| | - Sergry Zavadski
- Belarusian State University of Informatics and Radioelectronics, Electronic Technique and Technology Department, Center 10.1, Thin Film Research Laboratory, 6 P. Brovka str., 220013 Minsk, Belarus; (D.G.); (S.Z.); (S.M.)
| | - Siarhei Melnikov
- Belarusian State University of Informatics and Radioelectronics, Electronic Technique and Technology Department, Center 10.1, Thin Film Research Laboratory, 6 P. Brovka str., 220013 Minsk, Belarus; (D.G.); (S.Z.); (S.M.)
| |
Collapse
|