1
|
Ruiz-Agudo C, Cölfen H. Exploring the Potential of Nonclassical Crystallization Pathways to Advance Cementitious Materials. Chem Rev 2024; 124:7538-7618. [PMID: 38874016 PMCID: PMC11212030 DOI: 10.1021/acs.chemrev.3c00259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 05/31/2024] [Accepted: 06/03/2024] [Indexed: 06/15/2024]
Abstract
Understanding the crystallization of cement-binding phases, from basic units to macroscopic structures, can enhance cement performance, reduce clinker use, and lower CO2 emissions in the construction sector. This review examines the crystallization pathways of C-S-H (the main phase in PC cement) and other alternative binding phases, particularly as cement formulations evolve toward increasing SCMs and alternative binders as clinker replacements. We adopt a nonclassical crystallization perspective, which recognizes the existence of critical intermediate steps between ions in solution and the final crystalline phases, such as solute ion associates, dense liquid phases, amorphous intermediates, and nanoparticles. These multistep pathways uncover innovative strategies for controlling the crystallization of binding phases through additive use, potentially leading to highly optimized cement matrices. An outstanding example of additive-controlled crystallization in cementitious materials is the synthetically produced mesocrystalline C-S-H, renowned for its remarkable flexural strength. This highly ordered microstructure, which intercalates soft matter between inorganic and brittle C-S-H, was obtained by controlling the assembly of individual C-S-H subunits. While large-scale production of cementitious materials by a bottom-up self-assembly method is not yet feasible, the fundamental insights into the crystallization mechanism of cement binding phases presented here provide a foundation for developing advanced cement-based materials.
Collapse
Affiliation(s)
- Cristina Ruiz-Agudo
- Physical Chemistry, Department of Chemistry, University of Konstanz, Universitätsstr. 10, 78457 Konstanz, Germany
| | - Helmut Cölfen
- Physical Chemistry, Department of Chemistry, University of Konstanz, Universitätsstr. 10, 78457 Konstanz, Germany
| |
Collapse
|
2
|
Adamu A, Isaacs M, Boodhoo K, Abegão FR. Investigation of Cu/TiO2 synthesis methods and conditions for CO2 photocatalytic reduction via conversion of bicarbonate/carbonate to formate. J CO2 UTIL 2023. [DOI: 10.1016/j.jcou.2023.102428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
|
3
|
Yontar AK, Çevik S. Effects of Plant Extracts and Green-Synthesized Silver Nanoparticles on the Polyvinyl Alcohol (PVA) Nanocomposite Films. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2023. [DOI: 10.1007/s13369-023-07643-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
|
4
|
Yasui K. Merits and Demerits of ODE Modeling of Physicochemical Systems for Numerical Simulations. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27185860. [PMID: 36144593 PMCID: PMC9505051 DOI: 10.3390/molecules27185860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 09/02/2022] [Accepted: 09/07/2022] [Indexed: 11/25/2022]
Abstract
In comparison with the first-principles calculations mostly using partial differential equations (PDEs), numerical simulations with modeling by ordinary differential equations (ODEs) are sometimes superior in that they are computationally more economical and that important factors are more easily traced. However, a demerit of ODE modeling is the need of model validation through comparison with experimental data or results of the first-principles calculations. In the present review, examples of ODE modeling are reviewed such as sonochemical reactions inside a cavitation bubble, oriented attachment of nanocrystals, dynamic response of flexoelectric polarization, ultrasound-assisted sintering, and dynamics of a gas parcel in a thermoacoustic engine.
Collapse
Affiliation(s)
- Kyuichi Yasui
- National Institute of Advanced Industrial Science and Technology (AIST), Nagoya 463-8560, Japan
| |
Collapse
|
5
|
Bulavinets T, Yaremchuk I, Bobitski Y, Barylyak A. Synthesis and photocatalytic efficiency of plasmonic Ag/TiO2:S nanosystems. APPLIED NANOSCIENCE 2022. [DOI: 10.1007/s13204-022-02593-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
|
6
|
Abbas HA, Nasr RA, Vannier RN, Jamil TS. Improving of photocatalytic activity of barium ferrate via bismuth and copper co-doping for degradation of paracetamol under visible light irradiation. J Environ Sci (China) 2022; 112:331-342. [PMID: 34955216 DOI: 10.1016/j.jes.2021.05.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 04/29/2021] [Accepted: 05/08/2021] [Indexed: 06/14/2023]
Abstract
Nanosized Ba1-xBixFe1-xCuxO3 (12-50 nm) with x values of 0, 0.01, 0.05, and 0.1 system was prepared using the Pechini method. Structural, morphological, surface and optical characterizations were performed for the prepared samples. Cubic phase was the predominant phase for the undoped BaFeO3 and Bi and Cu co-doped BaFeO3 samples. Minor phases of monoclinic Ba2Fe2O5, orthorhombic BaFe2O4 and orthorhombic BaCO3 were identified for all the prepared samples. Ba0.95Bi0.05Fe0.95Cu0.05O3 sample has the lowest band gap (2.43 eV). 98.1% paracetamol removal was achieved with 0.75 g/L of Ba0.95Bi0.05Fe0.95Cu0.05O3 at pH 9 after 120 min. The paracetamol degradation follows the pseudo first-order kinetics. HO• is the main oxidative species responsible for the paracetamol degradation. Gas chromatography-mass spectrometry (GC-MS) analysis was performed at the end of the photocatalytic degradation experiment under optimum operating condition using Ba0.95Bi0.05Fe0.95Cu0.05O3 to explain the reaction mechanism and identify the intermediate by-products which is confirmed by ultraviolet/visible (UV/Vis) spectroscopy study at different reaction times.
Collapse
Affiliation(s)
- Hussien Ahmed Abbas
- Inorganic Chemistry Department, National Research Centre, Cairo 12622, Egypt
| | - Rabab Ahmed Nasr
- Water Pollution Control Department, National Research Center, Cairo 12622, Egypt.
| | - Rose-Noëlle Vannier
- Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, UMR 8181, Unité de Catalyse et Chimie du Solide (UCCS), Lille 59000, France
| | - Tarek Samir Jamil
- Water Pollution Control Department, National Research Center, Cairo 12622, Egypt
| |
Collapse
|
7
|
Sepahvand S, Bahrami M, Fallah N. Photocatalytic degradation of 2,4-DNT in simulated wastewater by magnetic CoFe 2O 4/SiO 2/TiO 2 nanoparticles. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:6479-6490. [PMID: 34455559 DOI: 10.1007/s11356-021-13690-3] [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: 05/13/2020] [Accepted: 03/24/2021] [Indexed: 06/13/2023]
Abstract
Discharge of 2,4-dinitrotoluene (2,4-DNT) into the environment leads to a serious soil and water sources pollution problem, due to toxicity and possible carcinogenicity of this toxic substance. In this work, the photocatalytic degradation of 2,4-DNT was investigated using CoFe2O4/SiO2/TiO2 nanoparticles. The catalyst features were characterized by using XRD, TEM, EDX, UV-vis DRS, FTIR, and VSM techniques. The influence of different experimental factors on degradation efficiency including pH value, catalyst dosages, and initiate concentration of 2,4-DNT were investigated. Mineralization of the model pollutant was determined using TOC analysis under optimum conditions. A possible mechanism, process kinetic and reusability of magnetic photocatalyst were also performed. In optimum experimental conditions (pH=3, photocatalyst dosage=0.75 g/L, 2,4-DNT=0.025 g/L), degradation efficiency achieved 88.5% within 180-min reaction time with TOC removal of 55.6%. Dominate oxidizing radicals during the degradation of 2,4-DNT by CoFe2O4/SiO2/TiO2 were hydroxyl radicals. The photocatalytic degradation of 2,4-DNT followed first-order rate kinetics. After three successive use cycles, the degradation efficiency was reduced by 64%. Our results revealed that the synthesized CoFe2O4/SiO2/TiO2 photocatalyst was a good choice for degradation of 2,4-DNT, due to proper potential reusability and catalytic activity.
Collapse
Affiliation(s)
- Somayeh Sepahvand
- Chemical Engineering Department, Amirkabir University of Technology (Tehran Polytechnic), P.O. Box 15875-4413, Tehran, Iran
| | - Mostafa Bahrami
- Chemical Engineering Department, Amirkabir University of Technology (Tehran Polytechnic), P.O. Box 15875-4413, Tehran, Iran
| | - Narges Fallah
- Chemical Engineering Department, Amirkabir University of Technology (Tehran Polytechnic), P.O. Box 15875-4413, Tehran, Iran.
| |
Collapse
|
8
|
Boytsova OV, Drozhzhin OA, Petukhov DI, Chumakova AV, Sobol AG, Beltyukov AN, Eliseev AA, Bosak AB. One-step synthesis of vanadium-doped anatase mesocrystals for Li-ion battery anodes. NANOTECHNOLOGY 2021; 33:055603. [PMID: 34670202 DOI: 10.1088/1361-6528/ac317a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Accepted: 10/20/2021] [Indexed: 06/13/2023]
Abstract
Here we report a successful one-step synthesis of vanadium-doped anatase mesocrystals by reactive annealing of NH4TiOF3/PEG2000 mesocrystal precursors with NH4VO3. The formation solid solution Ti1-xVxO2with vanadium content up tox = 25 at% inheriting the structure of mesocrystals is observed for the first time. The doping mechanism via vapor phase transport of vanadium is proposed. The Ti1-xVxO2mesocrystals exhibit improved specific capacity of 175 mAh g-1(compared to 150 mAh g-1for pure anatase phase) and decreased potential gap between charge and discharge processes.
Collapse
Affiliation(s)
- O V Boytsova
- Department of Materials Science, Lomonosov Moscow State University, 1-73 Leninskie Gory, Moscow, 119991, Russia
- Kurnakov Institute of General and Inorganic Chemistry RAS, Leninskii Prosp. 31, Moscow, 119071, Russia
| | - O A Drozhzhin
- Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskie Gory, Moscow, 119991, Russia
| | - D I Petukhov
- Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskie Gory, Moscow, 119991, Russia
| | - A V Chumakova
- European Synchrotron Radiation Facility, 78 Avenue des Martyrs, 38000 Grenoble, France
| | - A G Sobol
- Department of Materials Science, Lomonosov Moscow State University, 1-73 Leninskie Gory, Moscow, 119991, Russia
| | - A N Beltyukov
- Udmurt Federal Research Center of the Ural Brunch of Russian Academy of Sciences (UdmFRCof UB RAS), Izhevsk, st.them. Tatiana Baramzina 34, 426067, Russia
| | - A A Eliseev
- Department of Materials Science, Lomonosov Moscow State University, 1-73 Leninskie Gory, Moscow, 119991, Russia
| | - A B Bosak
- European Synchrotron Radiation Facility, 78 Avenue des Martyrs, 38000 Grenoble, France
| |
Collapse
|
9
|
Cao S, Ye X, Hu H, Jin H, Wang Y, Ye J. Rational synthesis of SrTiO3 nanodots anchored mesocrystalline anatase TiO2 submicrospheres for photocatalytic reduction of CrVI. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119096] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
|
10
|
Modified TiO2-rGO Binary Photo-Degradation Nanomaterials: Modification, Mechanism, and Perspective. CATALYSIS SURVEYS FROM ASIA 2021. [DOI: 10.1007/s10563-021-09349-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
11
|
Preparation of g-C3N4/MoS2 Composite Material and Its Visible Light Catalytic Performance. J Inorg Organomet Polym Mater 2021. [DOI: 10.1007/s10904-021-02099-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
|
12
|
Wu Y, Chan SY, Xu J, Liu X. Multiphoton Upconversion Materials for Photocatalysis and Environmental Remediation. Chem Asian J 2021; 16:2596-2609. [PMID: 34403201 DOI: 10.1002/asia.202100751] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Revised: 08/02/2021] [Indexed: 11/07/2022]
Abstract
Solar-driven photocatalysis holds great potential for energy conversion, environmental remediation, and sustainable chemistry. However, practical applications of conventional photocatalytic systems have been constrained by their insufficient ability to harvest solar radiation in the infrared spectrum. Lanthanide-doped upconversion materials possess high photostability, tunable absorption, and the ability to convert low-energy infrared radiation into high-energy emission, making them attractive for infrared-driven photocatalysis. This review highlights essential principles for rational design of efficient photocatalysts. Particular emphasis is placed on current state-of-the-arts that offer enhanced upconversion luminescence efficiency. We also summarize recent advances in lanthanide-doped upconversion materials for photocatalysis. We conclude with new challenges and prospects for future developments of infrared-driven photocatalysts.
Collapse
Affiliation(s)
- Yiming Wu
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research, Singapore, 138634, Singapore
| | - Siew Yin Chan
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research, Singapore, 138634, Singapore
| | - Jiahui Xu
- Department of Chemistry, National University of Singapore, Institution 3 Science Drive 3, Singapore, 117543, Singapore
| | - Xiaogang Liu
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research, Singapore, 138634, Singapore.,Department of Chemistry, National University of Singapore, Institution 3 Science Drive 3, Singapore, 117543, Singapore
| |
Collapse
|
13
|
Amoli AE, Masoumi M, Sharifzadeh M, Babaei F, Firouzzade Pasha G. Synthesis of TiO 2-Fe 2O 3 nanocomposite for the photocatalytic degradation of Direct Blue 199 and Basic Yellow 28 dyes under visible light irradiation. J DISPER SCI TECHNOL 2021. [DOI: 10.1080/01932691.2021.1957924] [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]
Affiliation(s)
- Armin Ehsani Amoli
- Department of Chemical Engineering, Faculty of Engineering, Islamic Azad University, Amol Branched, Amol, Iran
| | - Mojtaba Masoumi
- Department of Chemical Engineering, Faculty of Engineering, Islamic Azad University, Amol Branched, Amol, Iran
| | - Maziar Sharifzadeh
- Department of Chemical Engineering, Faculty of Engineering, Islamic Azad University, Amol Branched, Amol, Iran
| | - Fatemeh Babaei
- Research and Development Center, Mazandaran Gas Company, Sari, Iran
| | - Ghasem Firouzzade Pasha
- Department of Organic Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar, Iran
| |
Collapse
|
14
|
Boudjemaa A, Nongwe I, Mutuma B, Matsoso B, Bachari K, Coville N. TiO2@hollow carbon spheres: A photocatalyst for hydrogen generation under visible irradiation. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
15
|
Zhao W, Li Y, Shen W. Tuning the shape and crystal phase of TiO 2 nanoparticles for catalysis. Chem Commun (Camb) 2021; 57:6838-6850. [PMID: 34137748 DOI: 10.1039/d1cc01523k] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Synthesis of TiO2 nanoparticles with tunable shape and crystal phase has attracted considerable attention for the design of highly efficient heterogeneous catalysts. Tailoring the shape of TiO2, in the crystal phases of anatase, rutile, brookite and TiO2(B), allows tuning of the atomic configurations on the dominantly exposed facets for maximizing the active sites and regulating the reaction route towards a specific channel for achieving high selectivity. Moreover, the shape and crystal phase of TiO2 nanoparticles alter their interactions with metal species, which are commonly termed as strong metal-support interactions involving interfacial strain and charge transfer. On the other hand, metal particles, clusters and single atoms interact differently with TiO2, because of the variation of the electronic structure, while the surface of TiO2 determines the interfacial bonding via a geometric effect. The dynamic behavior of the metal-titania interfaces, driven by the chemisorption of the reactive molecules at elevated temperatures, also plays a decisive role in elaborating the structure-reactivity relationship.
Collapse
Affiliation(s)
- Wenning Zhao
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. and University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yong Li
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
| | - Wenjie Shen
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
| |
Collapse
|
16
|
Mu Z, Tang R, Liu Z. Construction of Inorganic Bulks through Coalescence of Particle Precursors. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:241. [PMID: 33477573 PMCID: PMC7831130 DOI: 10.3390/nano11010241] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 01/09/2021] [Accepted: 01/14/2021] [Indexed: 11/18/2022]
Abstract
Bulk inorganic materials play important roles in human society, and their construction is commonly achieved by the coalescence of inorganic nano- or micro-sized particles. Understanding the coalescence process promotes the elimination of particle interfaces, leading to continuous bulk phases with improved functions. In this review, we mainly focus on the coalescence of ceramic and metal materials for bulk construction. The basic knowledge of coalescent mechanism on inorganic materials is briefly introduced. Then, the properties of the inorganic precursors, which determine the coalescent behaviors of inorganic phases, are discussed from the views of particle interface, size, crystallinity, and orientation. The relationships between fundamental discoveries and industrial applications are emphasized. Based upon the understandings, the applications of inorganic bulk materials produced by the coalescence of their particle precursors are further presented. In conclusion, the challenges of particle coalescence for bulk material construction are presented, and the connection between recent fundamental findings and industrial applications is highlighted, aiming to provide an insightful outlook for the future development of functional inorganic materials.
Collapse
Affiliation(s)
- Zhao Mu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China; (Z.M.); (R.T.)
| | - Ruikang Tang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China; (Z.M.); (R.T.)
- State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China
| | - Zhaoming Liu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China; (Z.M.); (R.T.)
| |
Collapse
|
17
|
Wu YH, Cao YF, Fu ZZ, Lei BX, Sun ZF. Cube-like mixed-phases TiO2 mesocrystalline hollow boxes from in situ topotactic transformation for highly efficient dye-sensitized solar cells. ADV POWDER TECHNOL 2021. [DOI: 10.1016/j.apt.2020.11.027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
18
|
Alonizan N, Chouiref L, Omri K, Gondal MA, Madkhali N, Ghrib T, Alhassan AI. Photocatalytic Activity, Microstructures and Luminescent Study of Ti-ZS:M Nano-composites Materials. J Inorg Organomet Polym Mater 2020. [DOI: 10.1007/s10904-020-01598-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
19
|
Zahra Z, Habib Z, Chung S, Badshah MA. Exposure Route of TiO 2 NPs from Industrial Applications to Wastewater Treatment and Their Impacts on the Agro-Environment. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E1469. [PMID: 32727126 PMCID: PMC7466468 DOI: 10.3390/nano10081469] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 07/20/2020] [Accepted: 07/20/2020] [Indexed: 02/07/2023]
Abstract
The tremendous increase in the production and consumption of titanium dioxide (TiO2) nanoparticles (NPs) in numerous industrial products and applications has augmented the need to understand their role in wastewater treatment technologies. Likewise, the deleterious effects of wastewater on the environment and natural resources have compelled researchers to find out most suitable, economical and environment friendly approaches for its treatment. In this context, the use of TiO2 NPs as the representative of photocatalytic technology for industrial wastewater treatment is coming to the horizon. For centuries, the use of industrial wastewater to feed agriculture land has been a common practice across the globe and the sewage sludge generated from wastewater treatment plants is also used as fertilizer in agricultural soils. Therefore, it is necessary to be aware of possible exposure pathways of these NPs, especially in the perspective of wastewater treatment and their impacts on the agro-environment. This review highlights the potential exposure route of TiO2 NPs from industrial applications to wastewater treatment and its impacts on the agro-environment. Key elements of the review present the recent developments of TiO2 NPs in two main sectors including wastewater treatment and the agro-environment along with their potential exposure pathways. Furthermore, the direct exposure routes of these NPs from production to end-user consumption until their end phase needs to be studied in detail and optimization of their suitable applications and controlled use to ensure environmental safety.
Collapse
Affiliation(s)
- Zahra Zahra
- Department of Civil & Environmental Engineering, University of California-Irvine, Irvine, CA 92697, USA
| | - Zunaira Habib
- Institute of Environmental Sciences and Engineering, School of Civil and Environmental Engineering, National University of Sciences and Technology, Islamabad 44000, Pakistan;
| | - Sujin Chung
- Plamica Labs, Batten Hall, 125 Western Ave, Allston, MA 02163, USA;
| | - Mohsin Ali Badshah
- Department of Chemical and Biomolecular Engineering, University of California-Irvine, Irvine, CA 92697, USA;
| |
Collapse
|
20
|
Abstract
It is not an exaggerated fact that the semiconductor titanium dioxide (TiO2) has been evolved as a prototypical material to understand the photocatalytic process and has been demonstrated for various photocatalytic applications such as pollutants degradation, water splitting, heavy metal reduction, CO2 conversion, N2 fixation, bacterial disinfection, etc [...]
Collapse
|
21
|
D. Fakhrutdinova E, V. Shabalina A, A. Gerasimova M, L. Nemoykina A, V. Vodyankina O, A. Svetlichnyi V. Highly Defective Dark Nano Titanium Dioxide: Preparation via Pulsed Laser Ablation and Application. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E2054. [PMID: 32354077 PMCID: PMC7254401 DOI: 10.3390/ma13092054] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 04/25/2020] [Accepted: 04/27/2020] [Indexed: 12/04/2022]
Abstract
The development of methods to synthesize and study the properties of dark titania is of the utmost interest due to prospects for its use, primarily in photocatalysis when excited by visible light. In this work, the dark titania powder was prepared by pulsed laser ablation (Nd:YAG laser, 1064 nm, 7 ns) in water and dried in air. To study the changes occurring in the material, the thermal treatment was applied. The structure, composition, and properties of the obtained powders were studied using transmission electron microscopy, low-temperature N2 adsorption/desorption, X-ray diffraction, thermogravimetry/differential scanning calorimetry, X-ray photoelectron, Raman and UV-vis spectroscopies, and photoluminescence methods. The processes occurring in the initial material upon heating were studied. The electronic structure of the semiconductor materials was investigated, and the nature of the defects providing the visible light absorption was revealed. The photocatalytic and antibacterial activities of the materials obtained were also studied. Dark titania obtained via laser ablation in liquid was found to exhibit catalytic activity in the phenol photodegradation process under visible light (> 420 nm) and showed antibacterial activity against Staphylococcus aureus and bacteriostatic effect towards Escherichia coli.
Collapse
Affiliation(s)
- Elena D. Fakhrutdinova
- Laboratory of Advanced Materials and Technology, Tomsk State University, Tomsk 634050, Russia;
| | - Anastasiia V. Shabalina
- Laboratory of Advanced Materials and Technology, Tomsk State University, Tomsk 634050, Russia;
| | - Marina A. Gerasimova
- Laboratory of Biophotonics, Siberian Federal University, Krasnoyarsk 660041, Russia;
| | - Anna L. Nemoykina
- Laboratory of Biopolymers and Biotechnology, Tomsk State University, Tomsk 634050, Russia;
| | - Olga V. Vodyankina
- Laboratory of Catalytic Research, Tomsk State University, Tomsk 634050, Russia;
| | - Valery A. Svetlichnyi
- Laboratory of Advanced Materials and Technology, Tomsk State University, Tomsk 634050, Russia;
| |
Collapse
|
22
|
Razzaq A, In SI. TiO 2 Based Nanostructures for Photocatalytic CO 2 Conversion to Valuable Chemicals. MICROMACHINES 2019; 10:E326. [PMID: 31096666 PMCID: PMC6562687 DOI: 10.3390/mi10050326] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Revised: 05/01/2019] [Accepted: 05/08/2019] [Indexed: 01/28/2023]
Abstract
Photocatalytic conversion of CO2 to useful products is an alluring approach for acquiring the two-fold benefits of normalizing excess atmospheric CO2 levels and the production of solar chemicals/fuels. Therefore, photocatalytic materials are continuously being developed with enhanced performance in accordance with their respective domains. In recent years, nanostructured photocatalysts such as one dimensional (1-D), two dimensional (2-D) and three dimensional (3-D)/hierarchical have been a subject of great importance because of their explicit advantages over 0-D photocatalysts, including high surface areas, effective charge separation, directional charge transport, and light trapping/scattering effects. Furthermore, the strategy of doping (metals and non-metals), as well as coupling with a secondary material (noble metals, another semiconductor material, graphene, etc.), of nanostructured photocatalysts has resulted in an amplified photocatalytic performance. In the present review article, various titanium dioxide (TiO2)-based nanostructured photocatalysts are briefly overviewed with respect to their application in photocatalytic CO2 conversion to value-added chemicals. This review primarily focuses on the latest developments in TiO2-based nanostructures, specifically 1-D (TiO2 nanotubes, nanorods, nanowires, nanobelts etc.) and 2-D (TiO2 nanosheets, nanolayers), and the reaction conditions and analysis of key parameters and their role in the up-grading and augmentation of photocatalytic performance. Moreover, TiO2-based 3-D and/or hierarchical nanostructures for CO2 conversions are also briefly scrutinized, as they exhibit excellent performance based on the special nanostructure framework, and can be an exemplary photocatalyst architecture demonstrating an admirable performance in the near future.
Collapse
Affiliation(s)
- Abdul Razzaq
- Department of Chemical Engineering, COMSATS University Islamabad, Lahore Campus, 1.5 KM Defence Road, Off Raiwind Road, Lahore 54000, Pakistan.
| | - Su-Il In
- Department of Energy Science & Engineering, DGIST, 333 Techno Jungang-daero, Hyeonpung-myeon, Dalseong-gun, Daegu 42988, Korea.
| |
Collapse
|
23
|
Comparative Study of Four TiO2-Based Photocatalysts to Degrade 2,4-D in a Semi-Passive System. WATER 2019. [DOI: 10.3390/w11030621] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
In this study, the relative efficiency of four forms of supported titanium dioxide (TiO2) as a photocatalyst to degrade 2,4-dichlorophenoxyacetic acid (2,4-D) in Killex®, a commercially available herbicide was studied. Coated glass spheres, anodized plate, anodized mesh, and electro-photocatalysis using the anodized mesh were evaluated under an ultraviolet – light-emitting diode (UV-LED) light source at λ = 365 nm in a semi-passive mode. Energy consumption of the system was used to compare the efficiency of the photocatalysts. The results showed both photospheres and mesh consumed approximately 80 J/cm3 energy followed by electro-photocatalysis (112.2 J/cm3), and the anodized plate (114.5 J/cm3). Although electro-photocatalysis showed the fastest degradation rate (K = 5.04 mg L−1 h−1), its energy consumption was at the same level as the anodized plate with a lower degradation rate constant of 3.07 mg L−1 h−1. The results demonstrated that three-dimensional nanotubes of TiO2 surrounding the mesh provide superior degradation compared to one-dimensional arrays on the planar surface of the anodized plate. With limited broad-scale comparative studies between varieties of different TiO2 supports, this study provides a comparative analysis of relative degradation efficiencies between the four photocatalytic configurations.
Collapse
|
24
|
Phang SJ, Tan LL. Recent advances in carbon quantum dot (CQD)-based two dimensional materials for photocatalytic applications. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01452g] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This review presents up-to-date research findings and critical insights on trending topics of pristine CQDs and CQDs-based 2D nanomaterial composites.
Collapse
Affiliation(s)
- Sue Jiun Phang
- School of Engineering and Physical Sciences
- Heriot-Watt University Malaysia
- 62200 Putrajaya
- Malaysia
| | - Lling-Lling Tan
- School of Engineering and Physical Sciences
- Heriot-Watt University Malaysia
- 62200 Putrajaya
- Malaysia
- Multidisciplinary Platform of Advanced Engineering
| |
Collapse
|