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Aravindraj K, Mohana Roopan S. WO 3-based materials as heterogeneous catalysts for diverse organic transformations: a mini-review. SYNTHETIC COMMUN 2022. [DOI: 10.1080/00397911.2022.2089588] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Kumar Aravindraj
- Chemistry of Heterocycles & Natural Product Research Laboratory, School of Advanced Sciences, Vellore Institute of Technology, Vellore, India
| | - Selvaraj Mohana Roopan
- Chemistry of Heterocycles & Natural Product Research Laboratory, School of Advanced Sciences, Vellore Institute of Technology, Vellore, India
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Hossain MN, Lee SJ, Kim CL. Fabrication of TiO 2 ̶ KH550 ̶ PEG Super-Hydrophilic Coating on Glass Surface without UV/Plasma Treatment for Self-Cleaning and Anti-Fogging Applications. MATERIALS 2022; 15:ma15093292. [PMID: 35591625 PMCID: PMC9105175 DOI: 10.3390/ma15093292] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 04/27/2022] [Accepted: 04/28/2022] [Indexed: 02/01/2023]
Abstract
In this study, we have developed a self-cleaning transparent coating on a glass substrate by dip coating a TiO2 – KH550 – PEG mixed solution with super-hydrophilicity and good antifogging properties. The fabrication of the thin-film-coated glass is a one-step solution blending method that is performed by depositing only one layer of modified TiO2 nanoparticles at room temperature. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to determine the structure and morphology of the nanoparticles and the thin-film-coated glass. The surface functional groups were investigated using Fourier-transform infrared spectroscopy (FT-IR), and the optical properties of the glass coating were measured using a UV/Vis spectrometer. The results revealed that the KH-500-modified TiO2 film coating was in an anatase crystalline form. The hydrophilicity of the coated and uncoated glass substrates was observed by measuring their water contact angle (WCA) using a contact angle instrument. The maximum transparency of the coated glass measured in the visible region (380–780 nm) was approximately 70%, and it possessed excellent super-hydrophilic properties (WCA ~0°) at an annealing temperature of 350 °C without further need of UV or plasma treatment. These results demonstrate the super-hydrophilic coated glass surface has potential for use in self-cleaning and anti-fogging applications.
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Affiliation(s)
- Muhammad Nobi Hossain
- BK21 FOUR Program for Development of Regional Future Engineers in Smart Mechanical Components, Chosun University, Gwangju 61452, Korea; (M.N.H.); (S.-J.L.)
| | - Sung-Jun Lee
- BK21 FOUR Program for Development of Regional Future Engineers in Smart Mechanical Components, Chosun University, Gwangju 61452, Korea; (M.N.H.); (S.-J.L.)
- Department of Mechanical Engineering, Chosun University, Gwangju 61452, Korea
| | - Chang-Lae Kim
- BK21 FOUR Program for Development of Regional Future Engineers in Smart Mechanical Components, Chosun University, Gwangju 61452, Korea; (M.N.H.); (S.-J.L.)
- Department of Mechanical Engineering, Chosun University, Gwangju 61452, Korea
- Correspondence:
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Wang Y, Zhang X, You S, Hu Y. One-step electrosynthesis of visible light responsive double-walled alloy titanium dioxide nanotube arrays for use in photocatalytic degradation of dibutyl phthalate. RSC Adv 2020; 10:21238-21247. [PMID: 35518757 PMCID: PMC9054373 DOI: 10.1039/d0ra03627g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 05/27/2020] [Indexed: 11/21/2022] Open
Abstract
Using Ti-6Al-4V (TC4) alloy as a substrate, double-walled alloy titanium dioxide nanotube arrays (DW-ATNTAs) with a special porous inner wall and visible light response are synthesized in situ by an improved anodization method. During the anodization, the V element in the TC4 alloy converts into V2O5 which dominates the visible light response of DW-ATNTAs. After 3 h of irradiation with visible light, there is a nearly 97% reduction of dibutyl phthalate (DBP) by DW-ATNTAs in which the degradation kinetic constant is 50 and 7 times higher than that of titanium dioxide nanotube arrays (TNTAs) and alloy titanium dioxide layers (A-TiO2(plate)), respectively. The richly porous inner wall structure of DW-ATNTAs can provide sufficient vacancies for adsorption and active sites for photocatalytic reaction. Furthermore, the differences in the morphology of the inner and outer walls are attributed to the thicker carbon and fluorine-rich oxide layer (C, F-rich oxide layer) resulting from a longer time that the inner wall spends in contact with the electrolyte during the anodization process. This special porous inner wall structure was formed due to the anti-corrosion properties of the alloy caused by appropriate amounts of V and Al as well as the removal of C and F elements during the calcination process.
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Affiliation(s)
- Yuan Wang
- School of Environment and Energy, South China University of Technology Guangzhou 510006 P. R. China +86-20-3938-0573
| | - Xueke Zhang
- School of Environment and Energy, South China University of Technology Guangzhou 510006 P. R. China +86-20-3938-0573
| | - Suzhen You
- School of Environment and Energy, South China University of Technology Guangzhou 510006 P. R. China +86-20-3938-0573
| | - Yun Hu
- School of Environment and Energy, South China University of Technology Guangzhou 510006 P. R. China +86-20-3938-0573.,Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control Guangzhou 510006 P. R. China.,The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education Guangzhou 510006 P. R. China
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Sun G, Fan M, Chen L, Luo J, Liu R. Antifogging UV curable coatings based on hierarchical composite particles through electrostatic interactions. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124458] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Water drop-surface interactions as the basis for the design of anti-fogging surfaces: Theory, practice, and applications trends. Adv Colloid Interface Sci 2019; 263:68-94. [PMID: 30521982 DOI: 10.1016/j.cis.2018.11.005] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 10/23/2018] [Accepted: 11/20/2018] [Indexed: 11/22/2022]
Abstract
Glass- and polymer-based materials have become essential in the fabrication of a multitude of elements, including eyeglasses, automobile windshields, bathroom mirrors, greenhouses, and food packages, which unfortunately mist up under typical operating conditions. Far from being an innocuous phenomenon, the formation of minute water drops on the surface is detrimental to their optical properties (e.g., light-transmitting capability) and, in many cases, results in esthetical, hygienic, and safety concerns. In this context, it is therefore not surprising that research in the field of fog-resistant surfaces is gaining in popularity, particularly in recent years, in view of the growing number of studies focusing on this topic. This review addresses the most relevant advances released thus far on anti-fogging surfaces, with a particular focus on coating deposition, surface micro/nanostructuring, and surface functionalization. A brief explanation of how surfaces fog up and the main issues of interest linked to fogging phenomenon, including common problems, anti-fogging strategies, and wetting states are first presented. Anti-fogging mechanisms are then discussed in terms of the morphology of water drops, continuing with a description of the main fabrication techniques toward anti-fogging property. This review concludes with the current and the future perspectives on the utility of anti-fogging surfaces for several applications and some remaining challenges in this field.
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In vitro antimalarial activity of synthesized TiO 2 nanoparticles using Momordica charantia leaf extract against Plasmodium falciparum. J Appl Biomed 2018. [DOI: 10.1016/j.jab.2018.04.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
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Cui P, Hu Y, Zheng M, Wei C. Enhancement of visible-light photocatalytic activities of BiVO 4 coupled with g-C 3N 4 prepared using different precursors. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:32466-32477. [PMID: 30238256 DOI: 10.1007/s11356-018-3119-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2018] [Accepted: 08/31/2018] [Indexed: 06/08/2023]
Abstract
Graphitic-like carbon nitride (g-C3N4) photocatalyst was synthesized by a facile chemical pyrolysis method, which was built on the self-condensation of different precursors to generate g-C3N4, e.g., melamine, urea, and thiocarbamide. And the different precursors produced a great influence on the photocatalytic activities of g-C3N4. Heterojunctions of g-C3N4 and BiVO4 were synthesized using a facile solvent evaporation method. The formation of BiVO4/g-C3N4 composites were confirmed by XRD, FT-IR, SEM, XPS, and UV-Vis DRS. The photocatalytic activities for RhB degradation were evaluated under visible-light irradiation. The photocatalytic activity of g-C3N4 prepared by urea was higher than that of g-C3N4 prepared by melamine and thiocarbamide, which was attributed to its favorable dispersibility, larger specific surface area, and higher oxidation capacity. The heterojunction composites exhibited higher photocatalytic activity than pure g-C3N4 or BiVO4. The results showed obvious removal efficiency for RhB, and the optimal sample with a BiVO4 content of 10% exhibited higher efficiency than pure g-C3N4 and BiVO4, and 10 wt%BiVO4/CN-U showed the highest photocatalytic activity. The enhanced photocatalytic activity of BiVO4/g-C3N4 composite can be attributed to the intimate coupling between the two host substrates, resulting in an efficient charge separation.
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Affiliation(s)
- Peipei Cui
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, Guangzhou, 510006, People's Republic of China
| | - Yun Hu
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, Guangzhou, 510006, People's Republic of China.
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, People's Republic of China.
| | - Mengmeng Zheng
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, Guangzhou, 510006, People's Republic of China
| | - Chaohai Wei
- Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, Guangzhou, 510006, People's Republic of China
- The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou, 510006, People's Republic of China
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A Review of Conventional and Innovative- Sustainable Methods for Cleaning Reflectors in Concentrating Solar Power Plants. SUSTAINABILITY 2018. [DOI: 10.3390/su10113937] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The severe soiling of reflectors deployed in arid and semi arid locations decreases their reflectance and drives down the yield of the concentrating solar power (CSP) plants. To alleviate this issue, various sets of methods are available. The operation and maintenance (O&M) staff should opt for sustainable cleaning methods that are safe and environmentally friendly. To restore high reflectance, the cleaning vehicles of CSP plants must adapt to the constraints of each technology and to the layout of reflectors in the solar field. Water based methods are currently the most commonly used in CSP plants but they are not sustainable due to water scarcity and high soiling rates. The recovery and reuse of washing water can compensate for these methods and make them a more reasonable option for mediterranean and desert environments. Dry methods, on the other hand, are gaining more attraction as they are more suitable for desert regions. Some of these methods rely on ultrasonic wave or vibration for detaching the dust bonding from the reflectors surface, while other methods, known as preventive methods, focus on reducing the soiling by modifying the reflectors surface and incorporating self cleaning features using special coatings. Since the CSP plants operators aim to achieve the highest profit by minimizing the cost of cleaning while maintaining a high reflectance, optimizing the cleaning parameters and strategies is of great interest. This work presents the conventional water-based methods that are currently used in CSP plants in addition to sustainable alternative methods for dust removal and soiling prevention. Also, the cleaning effectiveness, the environmental impacts and the economic aspects of each technology are discussed.
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Han Z, Feng X, Guo Z, Niu S, Ren L. Flourishing Bioinspired Antifogging Materials with Superwettability: Progresses and Challenges. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1704652. [PMID: 29441617 DOI: 10.1002/adma.201704652] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 11/05/2017] [Indexed: 05/20/2023]
Abstract
Antifogging (AF) structure materials found in nature have great potential for enabling novel and emerging products and technologies to facilitate the daily life of human societies, attracting enormous research interests owing to their potential applications in display devices, traffics, agricultural greenhouse, food packaging, solar products, and other fields. The outstanding performance of biological AF surfaces encourages the rapid development and wide application of new AF materials. In fact, AF properties are inextricably associated with their surface superwettability. Generally, the superwettability of AF materials depends on a combination of their surface geometrical structures and surface chemical compositions. To explore their general design principles, recent progresses in the investigation of bioinspired AF materials are summarized herein. Recent developments of the mechanism, fabrication, and applications of bioinspired AF materials with superwettability are also a focus. This includes information on constructing superwetting AF materials based on designing the topographical structure and regulating the surface chemical composition. Finally, the remaining challenges and promising breakthroughs in this field are also briefly discussed.
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Affiliation(s)
- Zhiwu Han
- Key Laboratory of Bionic Engineering (Ministry of Education), Jilin University, Changchun, 130022, Jilin, P. R. China
| | - Xiaoming Feng
- Key Laboratory of Bionic Engineering (Ministry of Education), Jilin University, Changchun, 130022, Jilin, P. R. China
| | - Zhiguang Guo
- Key Laboratory of Bionic Engineering (Ministry of Education), Jilin University, Changchun, 130022, Jilin, P. R. China
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China
| | - Shichao Niu
- Key Laboratory of Bionic Engineering (Ministry of Education), Jilin University, Changchun, 130022, Jilin, P. R. China
| | - Luquan Ren
- Key Laboratory of Bionic Engineering (Ministry of Education), Jilin University, Changchun, 130022, Jilin, P. R. China
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Han Z, Feng X, Jiao Z, Wang Z, Zhang J, Zhao J, Niu S, Ren L. Bio-inspired antifogging PDMS coupled micro-pillared superhydrophobic arrays and SiO2 coatings. RSC Adv 2018; 8:26497-26505. [PMID: 35541092 PMCID: PMC9083089 DOI: 10.1039/c8ra04699a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 07/05/2018] [Indexed: 11/21/2022] Open
Abstract
Inspired by nature, a bio-inspired antifogging PDMS is designed and fabricated successfully using UV lithography and a template method. It achieves an excellent superhydrophobic antifogging property, which benefits from a coupling effect.
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Affiliation(s)
- Zhiwu Han
- Key Laboratory of Bionic Engineering
- Ministry of Education
- Jilin University
- Changchun 130022
- China
| | - Xiaoming Feng
- Key Laboratory of Bionic Engineering
- Ministry of Education
- Jilin University
- Changchun 130022
- China
| | - Zhibin Jiao
- Key Laboratory of Bionic Engineering
- Ministry of Education
- Jilin University
- Changchun 130022
- China
| | - Ze Wang
- Key Laboratory of Bionic Engineering
- Ministry of Education
- Jilin University
- Changchun 130022
- China
| | - Junqiu Zhang
- Key Laboratory of Bionic Engineering
- Ministry of Education
- Jilin University
- Changchun 130022
- China
| | - Jie Zhao
- Key Laboratory of Bionic Engineering
- Ministry of Education
- Jilin University
- Changchun 130022
- China
| | - Shichao Niu
- Key Laboratory of Bionic Engineering
- Ministry of Education
- Jilin University
- Changchun 130022
- China
| | - Luquan Ren
- Key Laboratory of Bionic Engineering
- Ministry of Education
- Jilin University
- Changchun 130022
- China
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Li J, Jia S, Sui G, Du L, Li B. Preparation of hollow Nd/TiO2 sub-microspheres with enhanced visible-light photocatalytic activity. RSC Adv 2017. [DOI: 10.1039/c7ra05228f] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Hollow Nd/TiO2 sub-microspheres with enhanced visible-light photocatalytic activity are synthesised by employing carbon spheres as the template.
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Affiliation(s)
- Jinlong Li
- College of Chemistry and Chemical Engineering
- Qiqihar University
- Qiqihar 161006
- China
| | - Shuaiqiang Jia
- College of Chemistry and Chemical Engineering
- Qiqihar University
- Qiqihar 161006
- China
| | - Guozhe Sui
- College of Chemistry and Chemical Engineering
- Qiqihar University
- Qiqihar 161006
- China
| | - Lijuan Du
- College of Chemistry and Chemical Engineering
- Qiqihar University
- Qiqihar 161006
- China
| | - Boxin Li
- College of Chemistry and Chemical Engineering
- Qiqihar University
- Qiqihar 161006
- China
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