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Meng M, Yang L, Yang J, Zhu Y, Li C, Xia H, Yuan H, Zhang M, Zhao Y, Tian F, Li J, Liu K, Wang L, Gan Z. Two-dimensional lateral anatase-rutile TiO 2 phase junctions with oxygen vacancies for robust photoelectrochemical water splitting. J Colloid Interface Sci 2023; 648:56-65. [PMID: 37295370 DOI: 10.1016/j.jcis.2023.05.193] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/27/2023] [Accepted: 05/31/2023] [Indexed: 06/12/2023]
Abstract
Exploiting the photoelectrode materials with broad solar light response, high-efficient separation of photogenerated charges and abundant active sites is extremely vital yet enormously challenging. Herein, an innovative two-dimensional (2D) lateral anatase-rutile TiO2 phase junctions with controllable oxygen vacancies perpendicularly aligned on Ti mesh is presented. Our experimental observations and theoretical calculations corroborate explicitly that the 2D lateral phase junctions together with three-dimensional arrays not only exhibit the high-efficient photogenerated charges separation guaranteed by the build-in electric field at the side-to-side interface, but also furnish enriching active sites. Moreover, the interfacial oxygen vacancies generate new defect energy levels and serve as electron donors, hence extending visible light response and further accelerating the separation and transfer of photogenerated charges. Profiting from these merits, the optimized photoelectrode yield a pronounced photocurrent density of 1.2 mA/cm2 at 1.23 V vs. RHE with Faradic efficiency of 100%, which is approximately 2.4 times larger than that of pristine 2D TiO2 nanosheets. Furthermore, the incident photon to current conversion efficiency (IPCE) of the optimized photoelectrode is also boosted within both ultraviolet and visible light regions. This research is envisioned deliver the new insight in developing the novel 2D lateral phase junctions for PEC applications.
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Affiliation(s)
- Ming Meng
- School of Physics and Telecommunication Engineering, Zhoukou Normal University, Zhoukou 466001, PR China.
| | - Lun Yang
- Institute for Advanced Materials, School of Physics and Electronic Science, Hubei Normal University, Huangshi 435002, PR China
| | - Jing Yang
- School of Physics and Telecommunication Engineering, Zhoukou Normal University, Zhoukou 466001, PR China
| | - Yu Zhu
- School of Physics and Telecommunication Engineering, Zhoukou Normal University, Zhoukou 466001, PR China
| | - Chunyang Li
- Henan Key Laboratory of Rare Earth Functional Materials, Zhoukou Normal University, Zhoukou 466001, PR China
| | - Hongjun Xia
- Henan Key Laboratory of Rare Earth Functional Materials, Zhoukou Normal University, Zhoukou 466001, PR China
| | - Honglei Yuan
- School of Physics and Telecommunication Engineering, Zhoukou Normal University, Zhoukou 466001, PR China
| | - Meng Zhang
- Institute for Advanced Materials, School of Physics and Electronic Science, Hubei Normal University, Huangshi 435002, PR China
| | - You Zhao
- Institute for Advanced Materials, School of Physics and Electronic Science, Hubei Normal University, Huangshi 435002, PR China
| | - Fengshou Tian
- Henan Key Laboratory of Rare Earth Functional Materials, Zhoukou Normal University, Zhoukou 466001, PR China
| | - Jitao Li
- School of Physics and Telecommunication Engineering, Zhoukou Normal University, Zhoukou 466001, PR China
| | - Kuili Liu
- School of Physics and Telecommunication Engineering, Zhoukou Normal University, Zhoukou 466001, PR China
| | - Lei Wang
- School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, PR China.
| | - Zhixing Gan
- Center for Future Optoelectronic Functional Materials, School of Computer and Electronic Information/School of Artificial Intelligence, Nanjing Normal University, Nanjing 210023, PR China.
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Paz-López CV, Fereidooni M, Praserthdam P, Praserthdam S, Farfán N, Marquez V. Comprehensive analysis (aerobic/anaerobic, molecular recognitions, band-position and degradation-mechanism) of undoped and Co-doped anatase-brookite - An experimental/theoretical evaluation of the less-studied TiO 2 mixed phase. ENVIRONMENTAL RESEARCH 2023; 229:115968. [PMID: 37121350 DOI: 10.1016/j.envres.2023.115968] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 04/12/2023] [Accepted: 04/19/2023] [Indexed: 05/07/2023]
Abstract
The molecular recognition (MRec) effect is required in the initial phase of organic reactions. The second stage involves molecular-orientations and molecular-orbitals energy-levels (MOrbE). The components of a reaction must be compatible in terms MRec and MOrbE. Therefore, the comprehension of photocatalytic systems applied in wastewater treatment will be improved if the MRec effect is also considered as an important factor. The purpose of this study is to provide a comprehensive understanding of the less studied anatase-brookite mixed-phase (doped and undoped). Anatase/brookite photocatalytic systems were evaluated utilizing experimental/theoretical approaches in H2O (aerobic/anaerobic) environments with Vis-light and the organic pollutant (OrPo) methyl orange (MO). The compatibility of MRec and MOrbE of anatase-brookite mixed-phase (with the different reactive system components) confirmed this is the optimal combination for photocatalytic application. Using the sol-gel method, AM-TiO2NP (amorphous), TiO2NP (crystalline), and TiO2NP-Co0.1 at% (crystalline Co-doped) anatase-brookite mixed-phase photocatalysts were obtained. The morphology and surface were characterized using XRD, BET, SEM, HR-TEM, FT-IR and XPS. Employing UV-vis DRS and PL, photo-response and electron-hole recombination were studied. LVS and Mott-Schottky plot were employed to determine photo-electrochemical activity. The results of TiO2NP photocatalytic degradation in both aerobic and anaerobic environments are remarkable. The results of molecular dynamics (MD) simulation and Fukui Function (FF) based on density functional theory (DFT) validate the remarkable photocatalytic MO degradation.
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Affiliation(s)
- C V Paz-López
- Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand.
| | - M Fereidooni
- Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand.
| | - P Praserthdam
- Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand.
| | - S Praserthdam
- Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand.
| | - N Farfán
- Facultad de Química, Departamento de Química Orgánica, Universidad Nacional Autónoma de México, 04510, Ciudad de México, Mexico.
| | - V Marquez
- Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand.
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Ouyang Q, Zeng Y, Yu Y, Tan L, Liu X, Zheng Y, Wu S. Ultrasound-Responsive Microneedles Eradicate Deep-Layered Wound Biofilm Based on TiO 2 Crystal Phase Engineering. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2205292. [PMID: 36408892 DOI: 10.1002/smll.202205292] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 10/13/2022] [Indexed: 06/16/2023]
Abstract
Wound biofilm infection has an inherent resistance to antibiotics, requiring physical debridement combined with chemical reagents or antibiotics in clinical treatment, but it is invasive and may exist as incomplete debridement. So, a new type of noninvasive and efficient treatment is needed to address this problem. Here, the crystal phase engineering of TiO2 is presented to explore the sonocatalytic properties of TiO2 nanoparticles with different phases, and find that the anatase-brookite TiO2 (AB) has the best antibacterial efficiency of 99.94% against S. aureus under 15 min of ultrasound (US) irradiation. The type II homojunction of AB not only enhances the adsorption and decreases the activation energy of O2 , respectively, but also has a great interfacial charge transfer efficiency under US, which can produce more reactive oxygen species than other types of TiO2 . The microneedles (MN) penetrate the biofilm in wound tissue and quickly disperse the loaded AB into the biofilm because the ultrasonic cavitation accelerates the dissolution of microneedles, which non-invasively and efficiently eradicates the deep-layered biofilm under US. This work explores the relationship between the phase composition of TiO2 and sonocatalytic property for the first time, and provides a new treatment strategy for wound biofilm infection through US-assisted microneedles therapy.
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Affiliation(s)
- Qunle Ouyang
- Biomedical Materials Engineering Research Center, Hubei Key Laboratory of Polymer Materials, Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science & Engineering, Hubei University, Wuhan, 430062, P. R. China
| | - Yuxuan Zeng
- Biomedical Materials Engineering Research Center, Hubei Key Laboratory of Polymer Materials, Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science & Engineering, Hubei University, Wuhan, 430062, P. R. China
| | - Yi Yu
- Biomedical Materials Engineering Research Center, Hubei Key Laboratory of Polymer Materials, Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science & Engineering, Hubei University, Wuhan, 430062, P. R. China
| | - Lei Tan
- Biomedical Materials Engineering Research Center, Hubei Key Laboratory of Polymer Materials, Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science & Engineering, Hubei University, Wuhan, 430062, P. R. China
- Department of Orthopedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, P. R. China
| | - Xiangmei Liu
- School of Life Science and Health Engineering, Hebei University of Technology, Xiping Avenue 5340, Tianjin, 300401, P. R. China
| | - Yufeng Zheng
- School of Materials Science & Engineering, Peking University, Yiheyuan Road 5#, Beijing, 100871, P. R. China
| | - Shuilin Wu
- School of Materials Science & Engineering, Peking University, Yiheyuan Road 5#, Beijing, 100871, P. R. China
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Guo L, Gao H, Liu K, Ding Y, Li X, Xie H. Construction of TiO2 Microsphere through Different Titanium Precursors via a Green Pathway. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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