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Otgonbayar Z, Kim J, Jekal S, Kim CG, Noh J, Oh WC, Yoon CM. Designing a highly near infrared-reflective black nanoparticles for autonomous driving based on the refractive index and principle. J Colloid Interface Sci 2024; 667:663-678. [PMID: 38670010 DOI: 10.1016/j.jcis.2024.04.133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 03/30/2024] [Accepted: 04/19/2024] [Indexed: 04/28/2024]
Abstract
HYPOTHESIS The development of highly NIR reflective black single-shell hollow nanoparticles (BSS-HNPs) can overcome the Light Detection and Ranging (LiDAR) sensor limitations of dark-tone materials. The crystalline phase of TiO2 and the refractive index can be controlled by calcination temperature. The formation of hollow structure and the refractive index is expected to simultaneously increase the light reflection and LiDAR detectability. EXPERIMENTS The BSS-HNPs are synthesized using the sol-gel method, calcination, NaBH4 reduction, and etching to form a hollow structure with true blackness. The computational bandgap calculation is conducted to determine the bandgap energy (Eg) of the white and black TiO2 with different crystalline structures. The blackness of the as-synthesized materials is determined by the Commission on Illumination (CIE) L*a*b* color system. FINDINGS The hydrophilic nature of BSS-HNPs enables the formulation of hydrophilic paints, allowing the mono-layer coating. With the synergistic effects of hollow structure and the refractive index, BSS-HNPs manifested superb NIR reflectance at LiDAR detection wavelengths. The high detectability, blackness, and hollow structure of BSS-HNPs can expand the variety of LiDAR-detectable dark-tone materials.
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Affiliation(s)
- Zambaga Otgonbayar
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Korea
| | - Jiwon Kim
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Korea
| | - Suk Jekal
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Korea
| | - Chan-Gyo Kim
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Korea
| | - Jungchul Noh
- McKetta Department of Chemical Engineering and Texas Material Institute, The University of Texas at Austin, Austin, TX 78712, USA
| | - Won-Chun Oh
- Department of Advanced Materials Science & Engineering, Hanseo University, 46 Hanseo 1-ro, Seosan-si, Chungnam 356-706, Korea
| | - Chang-Min Yoon
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Korea.
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2
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Jamil S, Jabeen N, Sajid F, Khan LU, Kanwal A, Sohail M, Zaheer M, Akhter Z. Visible light driven (VLD) reduced TiO 2-x nanocatalysts designed by inorganic and organic reducing agent-mediated solvothermal methods for electrocatalytic and photocatalytic applications. RSC Adv 2024; 14:24092-24104. [PMID: 39091372 PMCID: PMC11292792 DOI: 10.1039/d4ra03402c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2024] [Accepted: 07/11/2024] [Indexed: 08/04/2024] Open
Abstract
This work presents a comparative study on the structural, optical and electrochemical characteristics of visible light driven (VLD) reduced titanium dioxide (TiO2-x ) nanocatalysts synthesized via inorganic and organic synthetic routes. X-ray diffraction (XRD) patterns, Raman spectra and X-ray absorption fine structure (XAFS) analyses reflected anatase phase titania. Whereas, the quantitative EXAFS fit and XANES analysis revealed structural distortion due to the presence of oxygen and titanium vacancies with low valent Ti states in anatase lattices of certain nanocatalysts, which subsequently leads to better electrochemical and photocatalytic activities. Moreover, owing to the large surface area and mesoporous structures, the Mg-TiO2-x nanocatalysts exhibited enhanced water adsorption and ultimately increased overall water splitting with an OER overpotential equal to 420 mV vs. RHE at a current density of 10 mA cm-2 (Tafel slope = 62 mV dec-1), extended visible light absorbance, decreased photoluminescence (PL) intensity and increased carrier lifetime in comparison with commercial titania.
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Affiliation(s)
- Sadaf Jamil
- Department of Chemistry, Quaid-i-Azam University Islamabad 45320 Pakistan
| | - Naila Jabeen
- Nanosciences and Technology Division, National Centre for Physics QAU Campus, Shahdra Valley Road, P.O. Box 2141 Islamabad-44000 Pakistan
| | - Fatima Sajid
- Department of Chemistry, Quaid-i-Azam University Islamabad 45320 Pakistan
| | - Latif U Khan
- Synchrotron-light for Experimental Science and Applications in the Middle East (SESAME) P.O. Box 7 Allan 19252 Jordan
| | - Afia Kanwal
- Department of Chemistry, Quaid-i-Azam University Islamabad 45320 Pakistan
| | - Manzar Sohail
- School of Natural Sciences, National University of Sciences and Technology (NUST) H-12 Islamabad Pakistan
| | - Muhammad Zaheer
- Lahore University of Management Sciences DHA Lahore Cantt 54792 Pakistan
| | - Zareen Akhter
- Department of Chemistry, Quaid-i-Azam University Islamabad 45320 Pakistan
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3
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Ghamarpoor R, Fallah A, Jamshidi M. A Review of Synthesis Methods, Modifications, and Mechanisms of ZnO/TiO 2-Based Photocatalysts for Photodegradation of Contaminants. ACS OMEGA 2024; 9:25457-25492. [PMID: 38911730 PMCID: PMC11191136 DOI: 10.1021/acsomega.3c08717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 05/22/2024] [Accepted: 05/24/2024] [Indexed: 06/25/2024]
Abstract
The environment being surrounded by accumulated durable waste organic compounds has become a critical crisis for human societies. Generally, organic effluents of industrial plants released into the water source and air are removed by some physical and chemical processes. Utilizing photocatalysts as cost-effective, accessible, thermally/mechanically stable, nontoxic, reusable, and powerful UV-absorber compounds creates a new gateway toward the removal of dissolved, suspended, and gaseous pollutants even in trace amounts. TiO2 and ZnO are two prevalent photocatalysts in the field of removing contaminants from wastewater and air. Structural modification of the photocatalysts with metals, nonmetals, metal ions, and other semiconductors reduces the band gap energy and agglomeration and increases the affinity toward organic compounds in the composite structures to expand their usability on an industrial scale. This increases the extent of light absorbance and improves the photocatalytic efficiency. Selecting a suitable synthesis method is necessary to prepare a target photocatalyst with distinct properties such as high specific surface area, numerous surface functional groups, and an appropriate crystalline phase. In this Review, significant parameters for the synthesis and modification of TiO2- and ZnO-based photocatalysts are discussed in detail. Several proposed mechanistic routes according to photocatalytic composite structures are provided. Some electrochemical analyses using charge carrier trapping agents and delayed recombination help to plot mechanistic routes according to the direction of photoexcited species (electron-hole pairs) and design more effective photocatalytic processes in terms of cost-effective photocatalysts, saving time and increasing productivity.
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Affiliation(s)
- Reza Ghamarpoor
- Department
of Petroleum Engineering, Faculty of Engineering, University of Garmsar, Garmsar 3588115589, Iran
- Constructional
Polymers and Composites Research Lab, School of Chemical, Petroleum
and Gas Engineering, Iran University of
Science and Technology (IUST), Tehran 1311416846, Iran
| | - Akram Fallah
- Department
of Chemical Technologies, Iranian Research
Organization for Science and Technology (IROST), Tehran 3313193685, Iran
| | - Masoud Jamshidi
- Constructional
Polymers and Composites Research Lab, School of Chemical, Petroleum
and Gas Engineering, Iran University of
Science and Technology (IUST), Tehran 1311416846, Iran
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4
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Rossi L, Horváth E, Wang T, Grimaldi C, Sienkiewicz A, Márkus BG, Beke D, Forró L. Tuning the color of high-karat gold in Au-TiO 2 nanoparticle composites all the way to black. iScience 2024; 27:109655. [PMID: 38706864 PMCID: PMC11068548 DOI: 10.1016/j.isci.2024.109655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 03/22/2024] [Accepted: 04/01/2024] [Indexed: 05/07/2024] Open
Abstract
For centuries, artisans have harnessed gold nanoparticles to imbue their creations with the vibrant hues that captivate the eye through interactions with visible light. In modern times, these distinct optoelectronic characteristics have pivoted toward the forefront of innovative technologies, finding their niche in advanced applications from solar energy to medicine, overshadowing their artistic heritage. This investigation reimagines the utilitarian scope of gold by innovating the optical characteristics of gold-titania nanostructures. This allows for an expanded palette of colors that retain the value of the precious metal. We employ nanostructured TiO2 in a high-pressure-high-temperature sintering technique that stabilizes Au nanoparticles, thwarting coalescence, and Oswald ripening. Further refinement is possible by engineering TiO2 color centers through the introduction of oxygen vacancies and Ti3+ ions, which aid in creating an opulent high-karat black-gold, but preserve the mechanical attributes essential to the integrity and function of the final product.
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Affiliation(s)
- Lidia Rossi
- Laboratory of Physics of Complex Matter, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Endre Horváth
- Laboratory of Physics of Complex Matter, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
- Laboratory for Quantum Magnetism, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Tianyi Wang
- Stavropoulos Center for Complex Quantum Matter, Department of Physics and Astronomy, University of Notre Dame, Notre Dame, IN 46556, USA
| | - Claudio Grimaldi
- Laboratory of Physics of Complex Matter, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Andrzej Sienkiewicz
- Laboratory of Physics of Complex Matter, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
- Laboratory for Quantum Magnetism, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
- ADSresonances Sàrl, Martigny, Switzerland
| | - Bence Gábor Márkus
- Stavropoulos Center for Complex Quantum Matter, Department of Physics and Astronomy, University of Notre Dame, Notre Dame, IN 46556, USA
| | - David Beke
- Stavropoulos Center for Complex Quantum Matter, Department of Physics and Astronomy, University of Notre Dame, Notre Dame, IN 46556, USA
- Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Budapest, Hungary
| | - László Forró
- Laboratory of Physics of Complex Matter, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
- Stavropoulos Center for Complex Quantum Matter, Department of Physics and Astronomy, University of Notre Dame, Notre Dame, IN 46556, USA
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5
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Jekal S, Otgonbayar Z, Noh J, Sa M, Kim J, Kim CG, Chu YR, Kim HY, Song S, Choi H, Oh WC, Yoon CM. Designing Novel LiDAR-Detectable Plate-Type Materials: Synthesis, Chemistry, and Practical Application for Autonomous Working Environment. ACS APPLIED MATERIALS & INTERFACES 2024; 16:19121-19136. [PMID: 38588341 DOI: 10.1021/acsami.4c00470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/10/2024]
Abstract
Plate-type hollow black TiO2 (HL/BT) with a high NIR reflectance was fabricated for the first time as a LiDAR-detectable black material. A TiO2 layer was formed on commercial-grade glass by using the sol-gel method to obtain a plate-type structure. The glass template was then etched with hydrofluoric acid to form a hollow structure, and blackness was further achieved through NaBH4 reduction, which altered the oxidation state of TiO2 to black TixO2x-1 or Ti4+ to Ti3+ and Ti2+. The blackness of the HL/BT material was maintained by a novel approach that involved etching prior to reduction. The thickness of the TiO2 layer was controlled to maximize the NIR reflectance when applied as paint. The HL/BT material with a thickness of 140 nm (HL/BT140) showed a blackness (L*) of 13.3 and high NIR reflectance of 23.6% at a wavelength of 905 nm. This is attributed to the effective light reflection at the interface created by the TiO2 layer and the hollow structure. Plate-type HL/BT140 provides excellent spreadability, durability, and thermal stability in practical paint applications compared with sphere-type materials due to the higher contacting area to the applied surface, making it suitable for use as a LiDAR-detectable inorganic black pigment in autonomous environments.
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Affiliation(s)
- Suk Jekal
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Korea
| | - Zambaga Otgonbayar
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Korea
| | - Jungchul Noh
- McKetta Department of Chemical Engineering and Texas Material Institute, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Minki Sa
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Korea
| | - Jiwon Kim
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Korea
| | - Chan-Gyo Kim
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Korea
| | - Yeon-Ryong Chu
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Korea
| | - Ha-Yeong Kim
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Korea
| | - Seulki Song
- Department of Chemical Engineering and Applied Chemistry, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Korea
| | - Hyuntae Choi
- Department of Chemical Engineering and Applied Chemistry, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Korea
| | - Won-Chun Oh
- Department of Advanced Materials Science & Engineering, Hanseo University, 46 Hanseo 1-ro, Seosan-si, Chungnam 356-706, Korea
| | - Chang-Min Yoon
- Department of Chemical and Biological Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Korea
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6
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Huang Q, Zheng H, Wang X, Fu Q, Gong T, Liu C, Ma H, Ye L, Duan X, Yuan Y. Construction of Oxygen Vacancy-Rich TiO 2 Nanocrystals for Boosting the Ammonolysis of Caprolactam to 6-Aminocapronitrile. ACS APPLIED MATERIALS & INTERFACES 2024; 16:13806-13814. [PMID: 38466904 DOI: 10.1021/acsami.3c19591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/13/2024]
Abstract
Hexamethylene diamine, an important chemical intermediate for polyamides, can be synthesized through the two-step route of caprolactam (CPL) ammonolysis to 6-aminocapronitrile (ACN), followed by hydrogenation. This method has received increasing attention from academia and industry. However, studies on the catalyst structure-performance correlation in CPL ammonolysis are still sporadic. In this work, a series of anatase TiO2 with different oxygen vacancy concentrations was prepared by chemical reduction using NaBH4. The oxygen vacancy on TiO2 surface, presented as Ti3+ sites, substantially enhances the adsorption and activation of NH3, which are demonstrated as the key steps in ammonolysis. Owing to the synergistic effect of Ti3+ and Ti4+ species, the CPL conversion rate and ACN selectivity of 85 and 97%, respectively, are achieved within 250 h. Density functional theory calculations showed that the intermediates on oxygen vacancy-rich TiO2 had a more favorable adsorption energy compared to those on intact TiO2, which is in good agreement with the experimental results.
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Affiliation(s)
- Qihui Huang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Hui Zheng
- State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Xia Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Qi Fu
- Hubei Three Gorges Laboratory, Hubei Xingfa Chemical Group Co., Ltd., Yichang 443099, China
| | - Tao Gong
- Hubei Three Gorges Laboratory, Hubei Xingfa Chemical Group Co., Ltd., Yichang 443099, China
| | - Chang Liu
- Hubei Three Gorges Laboratory, Hubei Xingfa Chemical Group Co., Ltd., Yichang 443099, China
| | - Huijuan Ma
- Hubei Three Gorges Laboratory, Hubei Xingfa Chemical Group Co., Ltd., Yichang 443099, China
| | - Linmin Ye
- State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Xinping Duan
- State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Youzhu Yuan
- State Key Laboratory of Physical Chemistry of Solid Surfaces, National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
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7
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Song X, Meng Y, Zhou X, Cheng K, Liang Y, Yang Z. Red mud accommodated mesoporous black TiO 2 framework with enhanced organic pollutant photodegradation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:8689-8702. [PMID: 38180661 DOI: 10.1007/s11356-023-31666-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 12/18/2023] [Indexed: 01/06/2024]
Abstract
In this work, black TiO2 (BTiO2) loaded on black red mud (BRM) was successfully prepared with the conversion of Fe2O3 into magnetic Fe3O4 in red mud and the reduction of partial Ti4+ to Ti3+ in TiO2 via the facile sol-gel method and H2 reduction treatment. The obtained low-cost BRM/BTiO2 composites exhibit remarkable photocatalytic degradation toward rhodamine B (91.2%) and tetracycline (83.6%) under visible light irradiation, much better than pristine TiO2. This enhancement is attributed to the narrow bandgap with the desired solar-light excitation, the black color with good solar-light absorption, and the heterojunctions with the efficient separation of photogenerated electron-hole pairs. Moreover, the desired magnetic separation of BRM/BTiO2 composites realizes the recycle and recovery of photocatalysts, favoring practical applications in environment. This work provides a cost-efficiency way to prepare RM-supported TiO2 composites for treating organic pollutants in the wastewater, which is of great significance to the comprehensive utilization of RM waste, the cost saving of the photocatalyst, and the visible-light active enhancement of TiO2.
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Affiliation(s)
- Xiaojie Song
- Faculty of Materials Science and Chemistry, Engineering Research Center of Nano-Geomaterials, Ministry of Education, China University of Geosciences, Wuhan, 430074, China
| | - Ying Meng
- Faculty of Materials Science and Chemistry, Engineering Research Center of Nano-Geomaterials, Ministry of Education, China University of Geosciences, Wuhan, 430074, China
| | - Xin Zhou
- Faculty of Materials Science and Chemistry, Engineering Research Center of Nano-Geomaterials, Ministry of Education, China University of Geosciences, Wuhan, 430074, China
| | - Kang Cheng
- Faculty of Materials Science and Chemistry, Engineering Research Center of Nano-Geomaterials, Ministry of Education, China University of Geosciences, Wuhan, 430074, China
| | - Yu Liang
- Faculty of Materials Science and Chemistry, Engineering Research Center of Nano-Geomaterials, Ministry of Education, China University of Geosciences, Wuhan, 430074, China
| | - Zhihong Yang
- Faculty of Materials Science and Chemistry, Engineering Research Center of Nano-Geomaterials, Ministry of Education, China University of Geosciences, Wuhan, 430074, China.
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8
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Amiri Z, Hasani A, Abedini F, Malek M, Madaah Hosseini HR. Urease-Powered Black TiO 2 Micromotors for Photothermal Therapy of Bladder Cancer. ACS APPLIED MATERIALS & INTERFACES 2024; 16:3019-3030. [PMID: 38217858 DOI: 10.1021/acsami.3c11772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2024]
Abstract
Urease-powered nano/micromotors can move at physiological urea concentrations, making them useful for biomedical applications, such as treating bladder cancer. However, their movement in biological environments is still challenging. Herein, Janus micromotors based on black TiO2 with urease asymmetric catalytic coating were designed to take benefit of the optical properties of black TiO2 under near-infrared light and the movement capability in simulated bladder environments (urea). The black TiO2 microspheres were half-coated with a thin layer of Au, and l-Cysteine was utilized to attach the urease enzyme to the Au surface using its thiol group. Biocatalytic hydrolysis of urea through urease at biologically relevant concentrations provided the driving force for micromotors. A variety of parameters, such as urea fuel concentration, viscosity, and ionic character of the environment, were used to investigate how micromotors moved in different concentrations of urea in water, PBS, NaCl, and urine. The results indicate that micromotors are propelled through ionic self-diffusiophoresis caused by urea enzymatic catalysis. Due to their low toxicity and in vitro anticancer effect, micromotors are effective agents for photothermal therapy, which can help kill bladder cancer cells. These promising results suggest that biocompatible micromotors hold great potential for improving cancer treatment and facilitating diagnosis.
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Affiliation(s)
- Zahra Amiri
- Department of Materials Science and Engineering, Sharif University of Technology, P. C. 1458889694 Tehran, Iran
| | - Atefeh Hasani
- Department of Materials Science and Engineering, Sharif University of Technology, P. C. 1458889694 Tehran, Iran
| | - Fatemeh Abedini
- Department of Mechanical Engineering, Faculty of Engineering, University of Hormozgan, P. C. 7916193145 Bandar Abbas, Iran
| | - Mahrooz Malek
- Department of Radiology, Medical Imaging Center, Advanced Diagnostic and Interventional Radiology Research Center (ADIR), Tehran University of Medical Sciences, Imam Khomeini Hospital, P. C. 1416634793 Tehran, Iran
| | - Hamid Reza Madaah Hosseini
- Department of Materials Science and Engineering, Sharif University of Technology, P. C. 1458889694 Tehran, Iran
- Institute for Convergence Science and Technology (ICST), Sharif University of Technology, P. C. 1458889694 Tehran, Iran
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9
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Bigham A, Raucci MG, Zheng K, Boccaccini AR, Ambrosio L. Oxygen-Deficient Bioceramics: Combination of Diagnosis, Therapy, and Regeneration. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2302858. [PMID: 37259776 DOI: 10.1002/adma.202302858] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 05/15/2023] [Indexed: 06/02/2023]
Abstract
The journey of ceramics in medicine has been synchronized with an evolution from the first generation-alumina, zirconia, etc.-to the third -3D scaffolds. There is an up-and-coming member called oxygen-deficient or colored bioceramics, which have recently found their way through biomedical applications. The oxygen vacancy steers the light absorption toward visible and near infrared regions, making the colored bioceramics multifunctional-therapeutic, diagnostic, and regenerative. Oxygen-deficient bioceramics are capable of turning light into heat and reactive oxygen species for photothermal and photodynamic therapies, respectively, and concomitantly yield infrared and photoacoustic images. Different types of oxygen-deficient bioceramics have been recently developed through various synthesis routes. Some of them like TiO2- x , MoO3- x , and WOx have been more investigated for biomedical applications, whereas the rest have yet to be scrutinized. The most prominent advantage of these bioceramics over the other biomaterials is their multifunctionality endowed with a change in the microstructure. There are some challenges ahead of this category discussed at the end of the present review. By shedding light on this recently born bioceramics subcategory, it is believed that the field will undergo a big step further as these platforms are naturally multifunctional.
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Affiliation(s)
- Ashkan Bigham
- Institute of Polymers, Composites and Biomaterials-National Research Council (IPCB-CNR), Viale J. F. Kennedy 54-Mostra d'Oltremare pad. 20, Naples, 80125, Italy
- Department of Chemical, Materials and Production Engineering, University of Naples Federico II, Piazzale V. Tecchio 80, Naples, 80125, Italy
| | - Maria Grazia Raucci
- Institute of Polymers, Composites and Biomaterials-National Research Council (IPCB-CNR), Viale J. F. Kennedy 54-Mostra d'Oltremare pad. 20, Naples, 80125, Italy
| | - Kai Zheng
- Jiangsu Key Laboratory of Oral Diseases and Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing Medical University, Nanjing, 210029, China
| | - Aldo R Boccaccini
- Institute for Biomaterials, University of Erlangen-Nuremberg, 91058, Erlangen, Germany
| | - Luigi Ambrosio
- Institute of Polymers, Composites and Biomaterials-National Research Council (IPCB-CNR), Viale J. F. Kennedy 54-Mostra d'Oltremare pad. 20, Naples, 80125, Italy
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10
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Wang X, Ma S, Liu B, Wang S, Huang W. Imperfect makes perfect: defect engineering of photoelectrodes towards efficient photoelectrochemical water splitting. Chem Commun (Camb) 2023; 59:10044-10066. [PMID: 37551587 DOI: 10.1039/d3cc02843g] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/09/2023]
Abstract
Photoelectrochemical (PEC) water splitting for hydrogen evolution has been considered as a promising technology to solve the energy and environmental issues. However, the solar-to-hydrogen (STH) conversion efficiencies of current PEC systems are far from meeting the commercial demand (10%) due to the lack of efficient photoelectrode materials. The recent rapid development of defect engineering of photoelectrodes has significantly improved the PEC performance, which is expected to break through the bottleneck of low STH efficiency. In this review, the category and the construction methods of different defects in photoelectrode materials are summarized. Based on the in-depth summary and analysis of existing reports, the PEC performance enhancement mechanism of defect engineering is critically discussed in terms of light absorption, carrier separation and transport, and surface redox reactions. Finally, the application prospects and challenges of defect engineering for PEC water splitting are presented, and the future research directions in this field are also proposed.
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Affiliation(s)
- Xin Wang
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China.
| | - Siqing Ma
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China.
| | - Boyan Liu
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China.
| | - Songcan Wang
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China.
| | - Wei Huang
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE), Northwestern Polytechnical University, 127 West Youyi Road, Xi'an 710072, China.
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Fabrication and Application of Ag, Black TiO2 and Nitrogen-Doped 3D Reduced Graphene Oxide (3D Black TiO2/Ag/N@rGO) Evaporator for Efficient Steam Generation. Catalysts 2023. [DOI: 10.3390/catal13030514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023] Open
Abstract
The scarcity of fresh water, which is aggravated by rapid economic development and population growth, is a major threat to the modern world. Solar-driven interfacial desalination and steam generation is a promising strategy that localizes heat at the air-water interface through appropriate thermal management and demonstrates efficient photothermal performance. In the current study, Ag, black TiO2, and nitrogen-doped 3D reduced graphene oxide (3D black TiO2/Ag/N@rGO) hierarchical evaporator was fabricated, and its morphology, elemental composition, porosity, broadband solar absorption potential, photothermal performance, and interfacial desalination potential were assessed. The 3D solar evaporator showed efficient solar absorption over the entire broadband UV-visible near-infrared (UV-Vis NIR) region and demonstrated 99% photothermal conversion efficiency and potential freshwater generation of 1.43 kg·m−2 h−1. The specific surface area and porosity analyses demonstrated an ultrahigh specific surface area, high pore volume, and a mesoporous structure, with a predominant pore diameter of 4 nm. The strong photothermal performance can be attributed to the nitrogen doping of the rGO, which boosted the electrocatalytic and photothermal activity of the graphene through the activation of the excess free-flowing π electrons of the sp2 configuration of the graphene; the broadband solar absorption potential of the black TiO2; and the localized surface plasmon resonance effect of the AgNPs, which induced hot electron generation and enhanced photothermal conversion. Hence, the high photothermal conversion efficiency attained can be attributed to the synergistic photothermal performances of the individual components and the high interfacial surface area, abundant heat, and mass transfer microcavities of the 3D hierarchical porous solar absorber, offering multiple reflections of light and enhanced solar absorption. The study highlights the promising potential of the 3D evaporator for real-word interfacial desalination of seawater, helping to solve the water shortage problem sustainably.
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Sudrajat H, Susanti A, Hartuti S. Reduced TiO 2with prolonged electron lifetime for improving photocatalytic water reduction activity. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2023; 35:134001. [PMID: 36727439 DOI: 10.1088/1361-648x/acb4d2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 01/19/2023] [Indexed: 06/18/2023]
Abstract
The reduction of anatase TiO2with NaBH4under argon atmosphere at a high temperature resulted in a longer electron lifetime and a larger electron population. The reduced gray anatase sample with disorder layer showed a higher evolution rate of H2(130.2μmol h-1g-1) compared to pristine TiO2(24.1μmol h-1g-1) in the presence of Pt co-catalyst in an aqueous glucose solution under exposure to ultraviolet light (λ⩽ 400 nm). Ti3+and oxygen vacancy defects were proposed to exist in the reduced TiO2. A continuum tail forms above the valence band edge top as a result of these two defects, which contribute to the lattice disorder. This is presumably also the case with the conduction band, which has a continuum tail composed of mid-gap states as a result of the defects. The Ti3+and oxygen vacancy defects operate as shallow traps for photoexcited electrons, thereby preventing recombination. Since the defects are primarily located at the surface, i.e. in the disorder layer, the photoexcited electrons in shallow traps hence become readily available for the reduction of H3O+into H2. The prolonged electron lifetime increases the photoexcited electron population in the reduced TiO2, resulting in enhanced water reduction activity.
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Affiliation(s)
- Hanggara Sudrajat
- Research Center for Quantum Physics, National Research and Innovation Agency (BRIN), Tangerang Selatan 15314, Indonesia
- Collaboration Research Center for Advanced Energy Materials, National Research and Innovation Agency-Institut Teknologi Bandung, Bandung 40132, Indonesia
- Division of Computational Physics, Institute for Computational Science, Ton Duc Thang University, Ho Chi Minh City 700000, Vietnam
- Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City 700000, Vietnam
| | - Ari Susanti
- Department of Chemical Engineering, State Polytechnic of Malang, Malang 65141, Indonesia
| | - Sri Hartuti
- Department of Environmental Engineering, Padang Institute of Technology, Padang 25173, Indonesia
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Liao L, Wang M, Li Z, Wang X, Zhou W. Recent Advances in Black TiO 2 Nanomaterials for Solar Energy Conversion. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:468. [PMID: 36770430 PMCID: PMC9921477 DOI: 10.3390/nano13030468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 01/16/2023] [Accepted: 01/21/2023] [Indexed: 06/18/2023]
Abstract
Titanium dioxide (TiO2) nanomaterials have been widely used in photocatalytic energy conversion and environmental remediation due to their advantages of low cost, chemical stability, and relatively high photo-activity. However, applications of TiO2 have been restricted in the ultraviolet range because of the wide band gap. Broadening the light absorption of TiO2 nanomaterials is an efficient way to improve the photocatalytic activity. Thus, black TiO2 with extended light response range in the visible light and even near infrared light has been extensively exploited as efficient photocatalysts in the last decade. This review represents an attempt to conclude the recent developments in black TiO2 nanomaterials synthesized by modified treatment, which presented different structure, morphological features, reduced band gap, and enhanced solar energy harvesting efficiency. Special emphasis has been given to the newly developed synthetic methods, porous black TiO2, and the approaches for further improving the photocatalytic activity of black TiO2. Various black TiO2, doped black TiO2, metal-loaded black TiO2 and black TiO2 heterojunction photocatalysts, and their photocatalytic applications and mechanisms in the field of energy and environment are summarized in this review, to provide useful insights and new ideas in the related field.
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Visible-Light-Active Black TiO 2 Nanoparticles with Efficient Photocatalytic Performance for Degradation of Pharmaceuticals. NANOMATERIALS 2022; 12:nano12152563. [PMID: 35893534 PMCID: PMC9330099 DOI: 10.3390/nano12152563] [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: 07/16/2022] [Revised: 07/22/2022] [Accepted: 07/24/2022] [Indexed: 11/16/2022]
Abstract
Special attention has recently been paid to surface-defective titanium dioxide and black TiO2 with advanced optical, electrical, and photocatalytic properties. Synthesis of these materials for photodegradation and mineralization of persistent organic pollutants in water, especially under visible radiation, presents interest from scientific and application points of view. Chemical reduction by heating a TiO2 and NaBH4 mixture at 350 °C successfully introduced Ti3+ defects and oxygen vacancies at the surface of TiO2, with an increase in the photocatalytic degradation of amoxicillin—an antibiotic that is present in wastewater due to its intense use in human and animal medicine. Three TiO2 samples were prepared at different annealing temperatures to control the ratio between anatase and rutile and were subjected to chemical reduction. Electron paramagnetic resonance investigations showed that the formation of surface Ti3+ defects in a high concentration occurred mainly in the anatase sample annealed at 400 °C, contributing to the bandgap reduction from 3.32 eV to 2.92 eV. The reduced band gap enhances visible light absorption and the efficiency of photocatalysis. The nanoparticles of ~90 m2/g specific surface area and 12 nm average size exhibit ~100% efficiency in the degradation of amoxicillin under simulated solar irradiation compared with pristine TiO2. Mineralization of amoxicillin and by-products was over 75% after 48 h irradiation for the anatase sample, where the Ti3+ defects were present in a higher concentration at the catalyst’s surface.
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Kumar A, Kumar N. Advances in transparent polymer nanocomposites and their applications: A comprehensive review. POLYM-PLAST TECH MAT 2022. [DOI: 10.1080/25740881.2022.2029892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Affiliation(s)
- Atish Kumar
- Department of Industrial and Production Engineering, DR. B. R. Ambedkar National Institute of Technology, Jalandhar, India
| | - Narendra Kumar
- Department of Industrial and Production Engineering, DR. B. R. Ambedkar National Institute of Technology, Jalandhar, India
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Opto-Electronic Characterization of Photocatalysts Based on p,n-Junction Ternary and Quaternary Mixed Oxides Semiconductors (Cu2O-In2O3 and Cu2O-In2O3-TiO2). Catalysts 2022. [DOI: 10.3390/catal12020153] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Semiconductor materials are the basis of electronic devices employed in the communication and media industry. In the present work, we report the synthesis and characterization of mixed metal oxides (MOs) as p,n-junction photocatalysts, and demonstrate the correlation between the preparation technique and the properties of the materials. Solid-state UV-visible diffuse reflectance spectroscopy (UV-VIS DRS) allowed for the determination of the light absorption properties and the optical energy gap. X-ray photoelectron spectroscopy (XPS) allowed for the determination of the surface speciation and composition and for the determination of the valence band edge. The opto-electronic behavior was evaluated measuring the photocurrent generated after absorption of chopped visible light in a 3-electrode cell. Scanning electron microscopy (SEM) measurements allowed for auxiliary characterization of size and morphology, showing the formation of composites for the ternary Cu2O-In2O3 p,n-mixed oxide, and even more for the quaternary Cu2O-In2O3-TiO2 MO. Light absorption spectra and photocurrent-time curves mainly depend upon the composition of MOs, while the optical energy gap and defective absorption tail are closely related to the preparation methodology, time and thermal treatment. Qualitative electronic band structures of semiconductors are also presented.
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Defective Black TiO 2: Effects of Annealing Atmospheres and Urea Addition on the Properties and Photocatalytic Activities. NANOMATERIALS 2021; 11:nano11102648. [PMID: 34685089 PMCID: PMC8541354 DOI: 10.3390/nano11102648] [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: 09/14/2021] [Revised: 10/05/2021] [Accepted: 10/06/2021] [Indexed: 11/16/2022]
Abstract
A series of black TiO2 with and without the addition of urea were successfully prepared using a simple one-step synthetic method by calcination under different atmospheres (vacuum, He, or N2). The physicochemical, optical, and light-induced charge transfer properties of the as-prepared samples were characterized by various techniques. It was found that a vacuum atmosphere was more beneficial for the formation of oxygen vacancies (OVs) than the inert gases (He and N2) and the addition of urea-inhibited OVs formation. The samples annealed in the vacuum condition exhibited better visible-light adsorption abilities, narrower bandgaps, higher photo-induced charge separation efficiency, and lower recombination rates. Hydroxyl radicals (·OH) were the dominant oxidative species in the samples annealed under a vacuum. Finally, the samples annealed under vacuum conditions displayed higher photocatalytic activity for methylene blue (MB) degradation than the samples annealed under He or N2. Based on the above, this study provides new insights into the effects of annealing atmospheres and urea addition on the properties of black TiO2.
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Cazan C, Enesca A, Andronic L. Synergic Effect of TiO 2 Filler on the Mechanical Properties of Polymer Nanocomposites. Polymers (Basel) 2021; 13:polym13122017. [PMID: 34203085 PMCID: PMC8234789 DOI: 10.3390/polym13122017] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2021] [Revised: 06/11/2021] [Accepted: 06/18/2021] [Indexed: 12/23/2022] Open
Abstract
Nanocomposites with polymer matrix offer excellent opportunities to explore new functionalities beyond those of conventional materials. TiO2, as a reinforcement agent in polymeric nanocomposites, is a viable strategy that significantly enhanced their mechanical properties. The size of the filler plays an essential role in determining the mechanical properties of the nanocomposite. A defining feature of polymer nanocomposites is that the small size of the fillers leads to an increase in the interfacial area compared to traditional composites. The interfacial area generates a significant volume fraction of interfacial polymer, with properties different from the bulk polymer even at low loadings of the nanofiller. This review aims to provide specific guidelines on the correlations between the structures of TiO2 nanocomposites with polymeric matrix and their mechanical properties. The correlations will be established and explained based on interfaces realized between the polymer matrix and inorganic filler. The paper focuses on the influence of the composition parameters (type of polymeric matrix, TiO2 filler with surface modified/unmodified, additives) and technological parameters (processing methods, temperature, time, pressure) on the mechanical strength of TiO2 nanocomposites with the polymeric matrix.
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Affiliation(s)
- Cristina Cazan
- Renewable Energy Systems and Recycling Research Center, Transilvania University of Brasov, 500036 Brasov, Romania
- Correspondence:
| | - Alexandru Enesca
- Product Design, Mechatronics and Environment Department, Transilvania University of Brasov, 500036 Brasov, Romania; (A.E.); (L.A.)
| | - Luminita Andronic
- Product Design, Mechatronics and Environment Department, Transilvania University of Brasov, 500036 Brasov, Romania; (A.E.); (L.A.)
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Chan SC, Cheng YL, Chang BK, Hong CW. The origins of charge separation in anisotropic facet photocatalysts investigated through first-principles calculations. RSC Adv 2021; 11:18500-18508. [PMID: 35480943 PMCID: PMC9033447 DOI: 10.1039/d1ra01711j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 05/13/2021] [Indexed: 11/21/2022] Open
Abstract
It was recently discovered that the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) can be completed on the {110} and {001} facets, respectively, of a 18-facet SrTiO3 mono-crystal. The effective charge separation is attributed to the facet junction at the interface between two arbitrary anisotropic crystal planes. Theoretical estimation of the built-in potential at the facet junction can greatly improve understanding of the mechanism. This work employs density functional theory (DFT) calculations to investigate such potential at the (110)/(100) facet junction in SrTiO3 crystals. The formation of the facet junction is verified by a calculated work function difference between the (110) and (100) planes, which form p-type and n-type segments of the junction, respectively. The built-in potential is estimated at about 2.9 V. As a result, with the ultra high built-in potential, electrons and holes can effectively transfer to different anisotropic planes to complete both photo-oxidative and photo-reductive reactions.
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Affiliation(s)
- Shun-Chiao Chan
- Department of Power Mechanical Engineering, National Tsing Hua University Hsinchu City 300 Taiwan
| | - Yu-Lin Cheng
- Department of Power Mechanical Engineering, National Tsing Hua University Hsinchu City 300 Taiwan
| | - Bor Kae Chang
- Department of Chemical & Materials Engineering, National Central University Taoyuan City 320 Taiwan
| | - Che-Wun Hong
- Department of Power Mechanical Engineering, National Tsing Hua University Hsinchu City 300 Taiwan
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Highly Ordered TiO 2 Nanotube Arrays with Engineered Electrochemical Energy Storage Performances. MATERIALS 2021; 14:ma14030510. [PMID: 33494325 PMCID: PMC7865863 DOI: 10.3390/ma14030510] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 01/12/2021] [Accepted: 01/19/2021] [Indexed: 12/19/2022]
Abstract
Nanoscale engineering of regular structured materials is immensely demanded in various scientific areas. In this work, vertically oriented TiO2 nanotube arrays were grown by self-organizing electrochemical anodization. The effects of different fluoride ion concentrations (0.2 and 0.5 wt% NH4F) and different anodization times (2, 5, 10 and 20 h) on the morphology of nanotubes were systematically studied in an organic electrolyte (glycol). The growth mechanisms of amorphous and anatase TiO2 nanotubes were also studied. Under optimized conditions, we obtained TiO2 nanotubes with tube diameters of 70–160 nm and tube lengths of 6.5–45 μm. Serving as free-standing and binder-free electrodes, the kinetic, capacity, and stability performances of TiO2 nanotubes were tested as lithium-ion battery anodes. This work provides a facile strategy for constructing self-organized materials with optimized functionalities for applications.
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