1
|
Sayed DM, Salem KE, Allam NK. Optimized Lithography-Free Fabrication of Sub-100 nm Nb 2O 5 Nanotube Films as Negative Supercapacitor Electrodes: Tuned Oxygen Vacancies and Cationic Intercalation. ACS APPLIED MATERIALS & INTERFACES 2022; 14:25545-25555. [PMID: 35604325 DOI: 10.1021/acsami.2c05320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The direct growth of sub-100 nm thin-film metal oxides has witnessed a sustained interest as a superlative approach for the fabrication of smart energy storage platforms. Herein, sub-100 nm Zr-doped orthorhombic Nb2O5 nanotube films are synthesized directly on the Nb-Zr substrate and tested as negative supercapacitor electrode materials. To boost the pseudocapacitive performance of the fabricated films, supplement Nb4+ active sites (defects) are subtly induced into the metal oxide lattice, resulting in 13% improvement in the diffusion current at 100 m V/s over that of the defect-free counterpart. The defective sub-100 nm film (H-NbZr) exhibits areal and volumetric capacitances of 6.8 mF/cm2 and 758.3 F/cm3, respectively. The presence of oxygen-deficient states enhances the intrinsic conductivity of the thin film, resulting in a reduction in the band gap energy from 3.25 to 2.5 eV. The assembled supercapacitor device made of nitrogen-doped activated carbon (N-AC) and H-NbZr (N-AC//H-NbZr) is able to retain 93, 83, 78, and 66% of its first cycle capacitance after 1000, 2000, 3000, and 4500 successive charge/discharge cycles, respectively. An eminent energy record of approximately 0.77 μW h/cm2 at a power of 0.9 mW/cm2 is achieved at 1 mA/cm2 with superb capability.
Collapse
Affiliation(s)
- Doha M Sayed
- Energy Materials Laboratory, School of Sciences and Engineering, The American University in Cairo, New Cairo 11835, Egypt
- Department of Chemistry, Faculty of Science, Cairo University, Cairo 12613, Egypt
| | - Kholoud E Salem
- Energy Materials Laboratory, School of Sciences and Engineering, The American University in Cairo, New Cairo 11835, Egypt
| | - Nageh K Allam
- Energy Materials Laboratory, School of Sciences and Engineering, The American University in Cairo, New Cairo 11835, Egypt
| |
Collapse
|
2
|
Zhao Y, Li Y, Sun L. Recent advances in photocatalytic decomposition of water and pollutants for sustainable application. CHEMOSPHERE 2021; 276:130201. [PMID: 33725623 DOI: 10.1016/j.chemosphere.2021.130201] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 03/03/2021] [Accepted: 03/04/2021] [Indexed: 06/12/2023]
Abstract
Photoinduced reduction and oxidation, the important processes in photocatalytic water splitting and organic degradation, have generated increasing interest to address the energy and environmental issues. In this review, the recent developments in bandgap and interfacial engineering for enhanced light absorption, efficient charge separation and interfacial reaction are focused toward the applications in photocatalytic water splitting and organic degradation. In photoinduced reduction for hydrogen evolution, three major strategies are discussed: cocatalysts, sacrificial agents and heterojunctions. In photoinduced oxidation for organic degradation, three types of emerging pollutants of current concerns are highlighted: organic dyes, pharmaceuticals and volatile organic compounds. The key challenges of promising photocatalysts are discussed for future development and practical application.
Collapse
Affiliation(s)
- Yujie Zhao
- School of Materials Science and Engineering, Beihang Unviersity, Beijing, 100191, China
| | - Yan Li
- School of Materials Science and Engineering, Beihang Unviersity, Beijing, 100191, China.
| | - Lidong Sun
- School of Materials Science and Engineering, Chongqing University, Chongqing, 400044, China.
| |
Collapse
|
3
|
Saleh AA, Ahmed N, Biby AH, Allam NK. Supercapattery electrode materials by Design: Plasma-induced defect engineering of bimetallic oxyphosphides for energy storage. J Colloid Interface Sci 2021; 603:478-490. [PMID: 34216948 DOI: 10.1016/j.jcis.2021.06.125] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 06/12/2021] [Accepted: 06/21/2021] [Indexed: 11/30/2022]
Abstract
Although transition metal hydroxides are promising candidates as advanced supercapattery materials, they suffer from poor electrical conductivity. In this regard, previous studies have typically analyzed separately the impacts of defect engineering at the atomic level and the conversion of hydroxides to phosphides on conductivity and the overall electrochemical performance. Meanwhile, this paper uniquely studies the aforementioned methodologies simultaneously inside an all-in-one simple plasma treatment for nickel cobalt carbonate hydroxide, examines the effect of altering the nickel-to-cobalt ratio in the binder-free defect-engineered bimetallic Ni-Co system, and estimates the respective quantum capacitance. Results show that the concurrent defect-engineering and phosphidation of nickel cobalt carbonate hydroxide boost the amount of effective redox and adsorption sites and increase the conductivity and the operating potential window. The electrodes exhibit ultra-high-capacity of 1462 C g-1, which is among the highest reported for a nickel-cobalt phosphide/phosphate system. Besides, a hybrid supercapacitor device was fabricated that can deliver an energy density of 48 Wh kg-1 at a power density of 800 W kg-1, along with an outstanding cycling performance, using the best performing electrode as the positive electrode and graphene hydrogel as the negative electrode. These results outperform most Ni-Co-based materials, demonstrating that plasma-assisted defect-engineered Ni-Co-P/POx is a promising material for use to assemble efficient energy storage devices.
Collapse
Affiliation(s)
- Amina A Saleh
- Energy Materials Laboratory, School of Sciences and Engineering, The American University in Cairo, New Cairo 11835, Egypt
| | - Nashaat Ahmed
- Energy Materials Laboratory, School of Sciences and Engineering, The American University in Cairo, New Cairo 11835, Egypt
| | - Ahmed H Biby
- Energy Materials Laboratory, School of Sciences and Engineering, The American University in Cairo, New Cairo 11835, Egypt
| | - Nageh K Allam
- Energy Materials Laboratory, School of Sciences and Engineering, The American University in Cairo, New Cairo 11835, Egypt.
| |
Collapse
|
4
|
Sarraf M, Nasiri-Tabrizi B, Yeong CH, Madaah Hosseini HR, Saber-Samandari S, Basirun WJ, Tsuzuki T. Mixed oxide nanotubes in nanomedicine: A dead-end or a bridge to the future? CERAMICS INTERNATIONAL 2021; 47:2917-2948. [PMID: 32994658 PMCID: PMC7513735 DOI: 10.1016/j.ceramint.2020.09.177] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Revised: 09/16/2020] [Accepted: 09/18/2020] [Indexed: 05/12/2023]
Abstract
Nanomedicine has seen a significant rise in the development of new research tools and clinically functional devices. In this regard, significant advances and new commercial applications are expected in the pharmaceutical and orthopedic industries. For advanced orthopedic implant technologies, appropriate nanoscale surface modifications are highly effective strategies and are widely studied in the literature for improving implant performance. It is well-established that implants with nanotubular surfaces show a drastic improvement in new bone creation and gene expression compared to implants without nanotopography. Nevertheless, the scientific and clinical understanding of mixed oxide nanotubes (MONs) and their potential applications, especially in biomedical applications are still in the early stages of development. This review aims to establish a credible platform for the current and future roles of MONs in nanomedicine, particularly in advanced orthopedic implants. We first introduce the concept of MONs and then discuss the preparation strategies. This is followed by a review of the recent advancement of MONs in biomedical applications, including mineralization abilities, biocompatibility, antibacterial activity, cell culture, and animal testing, as well as clinical possibilities. To conclude, we propose that the combination of nanotubular surface modification with incorporating sensor allows clinicians to precisely record patient data as a critical contributor to evidence-based medicine.
Collapse
Key Words
- ALP, Alkaline Phosphatase
- APH, Anodization-Cyclic Precalcification-Heat Treatment
- Ag2O NPs, Silver Oxide Nanoparticles
- AgNPs, Silver Nanoparticles
- Anodization
- BIC, Bone-Implant Contact
- Bioassays
- CAGR, Compound Annual Growth Rate
- CT, Computed Tomography
- DMF, Dimethylformamide
- DMSO, Dimethyl Sulfoxide
- DRI, Drug-Releasing Implants
- E. Coli, Escherichia Coli
- ECs, Endothelial Cells
- EG, Ethylene Glycol
- Electrochemistry
- FA, Formamide
- Fe2+, Ferrous Ion
- Fe3+, Ferric Ion
- Fe3O4, Magnetite
- GEP, Gene Expression Programming
- GO, Graphene Oxide
- HA, Hydroxyapatite
- HObs, Human Osteoblasts
- HfO2 NTs, Hafnium Oxide Nanotubes
- IMCs, Intermetallic Compounds
- LEDs, Light emitting diodes
- MEMS, Microelectromechanical Systems
- MONs, Mixed Oxide Nanotubes
- MOPSO, Multi-Objective Particle Swarm Optimization
- MSCs, Mesenchymal Stem Cells
- Mixed oxide nanotubes
- NMF, N-methylformamide
- Nanomedicine
- OPC1, Osteo-Precursor Cell Line
- PSIs, Patient-Specific Implants
- PVD, Physical Vapor Deposition
- RF, Radio-Frequency
- ROS, Radical Oxygen Species
- S. aureus, Staphylococcus Aureus
- S. epidermidis, Staphylococcus Epidermidis
- SBF, Simulated Body Fluid
- TiO2 NTs, Titanium Dioxide Nanotubes
- V2O5, Vanadium Pentoxide
- VSMCs, Vascular Smooth Muscle Cells
- XPS, X-ray Photoelectron Spectroscopy
- ZrO2 NTs, Zirconium Dioxide Nanotubes
- hASCs, Human Adipose-Derived Stem Cells
Collapse
Affiliation(s)
- Masoud Sarraf
- Centre of Advanced Materials, Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia
- Materials Science and Engineering Department, Sharif University of Technology, P.O. Box 11155-9466, Azadi Avenue, Tehran, Iran
| | - Bahman Nasiri-Tabrizi
- School of Biosciences, Faculty of Health and Medical Sciences, Taylor's University, Subang Jaya, Malaysia
- New Technologies Research Center, Amirkabir University of Technology, Tehran, Iran
| | - Chai Hong Yeong
- School of Medicine, Faculty of Health and Medical Sciences, Taylor's University, Subang Jaya, Malaysia
| | - Hamid Reza Madaah Hosseini
- Materials Science and Engineering Department, Sharif University of Technology, P.O. Box 11155-9466, Azadi Avenue, Tehran, Iran
| | | | - Wan Jefrey Basirun
- Department of Chemistry, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Takuya Tsuzuki
- Research School of Electrical Energy and Materials Engineering, College of Engineering and Computer Science, Australian National University, Canberra, 2601, Australia
| |
Collapse
|
5
|
Recent Developments in the Use of Heterogeneous Semiconductor Photocatalyst Based Materials for a Visible-Light-Induced Water-Splitting System—A Brief Review. Catalysts 2021. [DOI: 10.3390/catal11020160] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Visible-light-driven photoelectrochemical (PEC) and photocatalytic water splitting systems featuring heterogeneous semiconductor photocatalysts (oxynitrides, oxysulfides, organophotocatalysts) signify an environmentally friendly and promising approach for the manufacturing of renewable hydrogen fuel. Semiconducting electrode materials as the main constituents in the PEC water splitting system have substantial effects on the device’s solar-to-hydrogen (STH) conversion efficiency. Given the complication of the photocatalysis and photoelectrolysis methods, it is indispensable to include the different electrocatalytic materials for advancing visible-light-driven water splitting, considered a difficult challenge. Heterogeneous semiconductor-based materials with narrower bandgaps (2.5 to 1.9 eV), equivalent to the theoretical STH efficiencies ranging from 9.3% to 20.9%, are recognized as new types of photoabsorbents to engage as photoelectrodes for PEC water oxidation and have fascinated much consideration. Herein, we spotlight mainly on heterogenous semiconductor-based photoanode materials for PEC water splitting. Different heterogeneous photocatalysts based materials are emphasized in different groups, such as oxynitrides, oxysulfides, and organic solids. Lastly, the design approach and future developments regarding heterogeneous photocatalysts oxide electrodes for PEC applications and photocatalytic applications are also discussed.
Collapse
|
6
|
Zhou S, Liu S, Su K, Jia K. Graphite carbon nitride coupled S-doped hydrogenated TiO2 nanotube arrays with improved photoelectrochemical performance. J Electroanal Chem (Lausanne) 2020. [DOI: 10.1016/j.jelechem.2020.114008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
|
7
|
Chen X, Zhang Y, Wu B, Sant G. A Nitrogen- and Self-Doped Titania Coating Enables the On-Demand Release of Free Radical Species. ACS OMEGA 2019; 4:18567-18573. [PMID: 31737815 PMCID: PMC6854566 DOI: 10.1021/acsomega.9b02188] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 10/22/2019] [Indexed: 06/10/2023]
Abstract
For potential applications such as suppressing the onset of peri-implant infections, a doped titania coating was developed to induce free radical release because of its ability for microbial elimination. The coatability of the sol-gel precursor is robust since the suspension's rheology can be modified to attain uniform and complete surface coverage. The coating is composed of a mixture of anatase and rutile polymorphs doped with nitrogen (N3-), and it contains substoichiometric Ti2+ and Ti3+ species. Nitrogen doping results in a 0.4 eV band gap shift, while the defects induce photocurrent generation under visible light excitation up to 650 nm. Greater currents were observed in the nitrogen-doped titania at wavelengths above 450 nm vis-à-vis its (singularly) self-doped counterparts. The (photo)electrochemical behavior and photoactivity of the coating were evaluated by assessing redox species formation in a background aqueous solution. In the absence of any illumination, the coating behaved as an insulator and inhibited the activities of both oxidative and reductive species. On the other hand, under illumination, the coating enhances oxidation processes and inhibits reduction reactions within a near-field region wherein release of free radicals occurs and is constrained (delimited).
Collapse
Affiliation(s)
- Xin Chen
- Laboratory
for the Chemistry of Construction Materials (LC), Department
of Civil and Environmental Engineering, Departments of Bioengineering,
Advanced Prosthodontics, and Orthopedic Surgery, Department of Materials Science and
Engineering, California Nanosystems Institute (CNSI), Weintraub Center for Reconstructive
Biotechnology, and Institute for Carbon Management (ICM), University of California, Los Angeles, California 90095, United States
| | - Yulong Zhang
- Laboratory
for the Chemistry of Construction Materials (LC), Department
of Civil and Environmental Engineering, Departments of Bioengineering,
Advanced Prosthodontics, and Orthopedic Surgery, Department of Materials Science and
Engineering, California Nanosystems Institute (CNSI), Weintraub Center for Reconstructive
Biotechnology, and Institute for Carbon Management (ICM), University of California, Los Angeles, California 90095, United States
| | - Benjamin Wu
- Laboratory
for the Chemistry of Construction Materials (LC), Department
of Civil and Environmental Engineering, Departments of Bioengineering,
Advanced Prosthodontics, and Orthopedic Surgery, Department of Materials Science and
Engineering, California Nanosystems Institute (CNSI), Weintraub Center for Reconstructive
Biotechnology, and Institute for Carbon Management (ICM), University of California, Los Angeles, California 90095, United States
| | - Gaurav Sant
- Laboratory
for the Chemistry of Construction Materials (LC), Department
of Civil and Environmental Engineering, Departments of Bioengineering,
Advanced Prosthodontics, and Orthopedic Surgery, Department of Materials Science and
Engineering, California Nanosystems Institute (CNSI), Weintraub Center for Reconstructive
Biotechnology, and Institute for Carbon Management (ICM), University of California, Los Angeles, California 90095, United States
| |
Collapse
|
8
|
Current progress in developing metal oxide nanoarrays-based photoanodes for photoelectrochemical water splitting. Sci Bull (Beijing) 2019; 64:1348-1380. [PMID: 36659664 DOI: 10.1016/j.scib.2019.07.017] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Revised: 06/27/2019] [Accepted: 07/03/2019] [Indexed: 01/21/2023]
Abstract
Solar energy driven photoelectrochemical (PEC) water splitting is a clean and powerful approach for renewable hydrogen production. The design and construction of metal oxide based nanoarray photoanodes is one of the promising strategies to make the continuous breakthroughs in solar to hydrogen conversion efficiency of PEC cells owing to their owned several advantages including enhanced reactive surface at the electrode/electrolyte interface, improved light absorption capability, increased charge separation efficiency and direct electron transport pathways. In this Review, we first introduce the structure, work principle and their relevant efficiency calculations of a PEC cell. We then give a summary of the state-of the-art research in the preparation strategies and growth mechanism for the metal oxide based nanoarrays, and some details about the performances of metal oxide based nanoarray photoanodes for PEC water splitting. Finally, we discuss key aspects which should be addressed in continued work on realizing high-efficiency metal oxide based nanoarray photoanodes for PEC solar water splitting systems.
Collapse
|
9
|
Kumar UN, Ghosh S, Thomas T. Metal Oxynitrides as Promising Electrode Materials for Supercapacitor Applications. ChemElectroChem 2019. [DOI: 10.1002/celc.201801542] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- U. Naveen Kumar
- Department of Metallurgical and Materials EngineeringIndian Institute of Technology Madras, Adyar Chennai, Tamilnadu India
| | - Sourav Ghosh
- Department of Metallurgical and Materials EngineeringIndian Institute of Technology Madras, Adyar Chennai, Tamilnadu India
- Department of ChemistryIndian Institute of Technology Madras, Adyar Chennai, Tamilnadu India
| | - Tiju Thomas
- Department of Metallurgical and Materials EngineeringIndian Institute of Technology Madras, Adyar Chennai, Tamilnadu India
- Indian Solar Energy Harnessing Centre-An Energy ConsortiumIndian Institute of Technology Madras, Adyar Chennai, Tamilnadu India
| |
Collapse
|
10
|
El-Shazly TS, Hassan WM, Abd El Rehim SS, Allam NK. Optical and electronic properties of niobium oxynitrides with various N/O ratios: insights from first-principles calculations. JOURNAL OF PHOTONICS FOR ENERGY 2018; 8:1. [DOI: 10.1117/1.jpe.8.026501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Affiliation(s)
| | - Walid M. Hassan
- Cairo University, Chemistry Department, Faculty of Science, Giza
| | | | - Nageh K. Allam
- The American University in Cairo, School of Sciences and Engineering, Energy Materials Laboratory, N
| |
Collapse
|
11
|
An J, Jin K, Sim U, Nam KT. Electrochemical Analysis of Carbon Nanosheet Catalyst on Silicon Photocathode for Hydrogen Generation. B KOREAN CHEM SOC 2018. [DOI: 10.1002/bkcs.11394] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Junghyun An
- Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM); Seoul National University; Seoul 08826 Republic of Korea
| | - Kyoungsuk Jin
- Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM); Seoul National University; Seoul 08826 Republic of Korea
| | - Uk Sim
- Department of Materials Science and Engineering; Chonnam National University; Gwangju 61186 Republic of Korea
| | - Ki Tae Nam
- Department of Materials Science and Engineering, Research Institute of Advanced Materials (RIAM); Seoul National University; Seoul 08826 Republic of Korea
| |
Collapse
|
12
|
Current Advances in TiO2-Based Nanostructure Electrodes for High Performance Lithium Ion Batteries. BATTERIES-BASEL 2018. [DOI: 10.3390/batteries4010007] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
|
13
|
Soliman KA, Zedan AF, Khalifa A, El-Sayed HA, Aljaber AS, AlQaradawi SY, Allam NK. Silver Nanoparticles-Decorated Titanium Oxynitride Nanotube Arrays for Enhanced Solar Fuel Generation. Sci Rep 2017; 7:1913. [PMID: 28507303 PMCID: PMC5432516 DOI: 10.1038/s41598-017-02124-1] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Accepted: 04/06/2017] [Indexed: 11/08/2022] Open
Abstract
We demonstrate, for the first time, the synthesis of highly ordered titanium oxynitride nanotube arrays sensitized with Ag nanoparticles (Ag/TiON) as an attractive class of materials for visible-light-driven water splitting. The nanostructure topology of TiO2, TiON and Ag/TiON was investigated using FESEM and TEM. The X-ray photoelectron spectroscopy (XPS) and the energy dispersive X-ray spectroscopy (EDS) analyses confirm the formation of the oxynitride structure. Upon their use to split water photoelectrochemically under AM 1.5 G illumination (100 mW/cm2, 0.1 M KOH), the titanium oxynitride nanotube array films showed significant increase in the photocurrent (6 mA/cm2) compared to the TiO2 nanotubes counterpart (0.15 mA/cm2). Moreover, decorating the TiON nanotubes with Ag nanoparticles (13 ± 2 nm in size) resulted in exceptionally high photocurrent reaching 14 mA/cm2 at 1.0 VSCE. This enhancement in the photocurrent is related to the synergistic effects of Ag decoration, nitrogen doping, and the unique structural properties of the fabricated nanotube arrays.
Collapse
Affiliation(s)
- Khaled A Soliman
- Department of Chemistry and Earth Sciences, Qatar University, Doha, 2713, Qatar
- Physical Chemistry Department, National Research Centre, Dokki, Cairo, 12441, Egypt
| | - Abdallah F Zedan
- Department of Chemistry and Earth Sciences, Qatar University, Doha, 2713, Qatar
- National Institute of Laser Enhanced Science, Cairo University, Giza, 12613, Egypt
| | - Ahmed Khalifa
- Energy Materials Laboratory (EML), School of Sciences and Engineering, The American University in Cairo, New Cairo, 11835, Egypt
| | - Hany A El-Sayed
- Department of Chemistry, Technische Universität München, Lichtenbergstrasse 4, 85748, Garching, Germany
| | - Amina S Aljaber
- Department of Chemistry and Earth Sciences, Qatar University, Doha, 2713, Qatar
| | - Siham Y AlQaradawi
- Department of Chemistry and Earth Sciences, Qatar University, Doha, 2713, Qatar
| | - Nageh K Allam
- Energy Materials Laboratory (EML), School of Sciences and Engineering, The American University in Cairo, New Cairo, 11835, Egypt.
| |
Collapse
|
14
|
Li C, Sivaranjani K, Kim JM. Synthesis of alkali promoted mesoporous, nanocrystalline Pd/TiO2 catalyst for water gas shift reaction. Catal Today 2016. [DOI: 10.1016/j.cattod.2015.08.028] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
15
|
Taki M, Rezaei B, Ensafi AA, Karami K, Abedanzaheh S, Fani N. Novel Alizarin palladacyclic complexes as sensitizers in high durable dye-sensitized solar cells. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.02.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
16
|
Photoelectrocatalytic Glucose Oxidation to Promote Hydrogen Production over Periodically Ordered TiO2 Nanotube Arrays Assembled of Pd Quantum Dots. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.05.094] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
|
17
|
Xiao FX, Miao J, Tao HB, Hung SF, Wang HY, Yang HB, Chen J, Chen R, Liu B. One-dimensional hybrid nanostructures for heterogeneous photocatalysis and photoelectrocatalysis. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:2115-31. [PMID: 25641821 DOI: 10.1002/smll.201402420] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Revised: 11/06/2014] [Indexed: 05/25/2023]
Abstract
Semiconductor-based photocatalysis and photoelectrocatalysis have received considerable attention as alternative approaches for solar energy harvesting and storage. The photocatalytic or photoelectrocatalytic performance of a semiconductor is closely related to the design of the semiconductor at the nanoscale. Among various nanostructures, one-dimensional (1D) nanostructured photocatalysts and photoelectrodes have attracted increasing interest owing to their unique optical, structural, and electronic advantages. In this article, a comprehensive review of the current research efforts towards the development of 1D semiconductor nanomaterials for heterogeneous photocatalysis and photoelectrocatalysis is provided and, in particular, a discussion of how to overcome the challenges for achieving full potential of 1D nanostructures is presented. It is anticipated that this review will afford enriched information on the rational exploration of the structural and electronic properties of 1D semiconductor nanostructures for achieving more efficient 1D nanostructure-based photocatalysts and photoelectrodes for high-efficiency solar energy conversion.
Collapse
Affiliation(s)
- Fang-Xing Xiao
- School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459, Singapore
| | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Gao M, Zhu L, Ong WL, Wang J, Ho GW. Structural design of TiO2-based photocatalyst for H2 production and degradation applications. Catal Sci Technol 2015. [DOI: 10.1039/c5cy00879d] [Citation(s) in RCA: 189] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
This review aims to provide a comprehensive and contemporary overview, as well as a guide of the development of new generation TiO2 based photocatalysts via structural design for improved solar energy conversion technologies.
Collapse
Affiliation(s)
- Minmin Gao
- Department of Electrical and Computer Engineering
- National University of Singapore
- Singapore 117583
| | - Liangliang Zhu
- Department of Electrical and Computer Engineering
- National University of Singapore
- Singapore 117583
| | - Wei Li Ong
- Department of Electrical and Computer Engineering
- National University of Singapore
- Singapore 117583
| | - Jing Wang
- Department of Electrical and Computer Engineering
- National University of Singapore
- Singapore 117583
| | - Ghim Wei Ho
- Department of Electrical and Computer Engineering
- National University of Singapore
- Singapore 117583
- Engineering Science Programme
- National University of Singapore
| |
Collapse
|
19
|
Srivastava S, Thomas JP, Rahman MA, Abd-Ellah M, Mohapatra M, Pradhan D, Heinig NF, Leung KT. Size-selected TiO₂ nanocluster catalysts for efficient photoelectrochemical water splitting. ACS NANO 2014; 8:11891-11898. [PMID: 25365773 DOI: 10.1021/nn505705a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Nanoclusters (NCs) are of great interest because they provide the link between the distinct behavior of atoms and nanoparticles and that of bulk materials. Here, we report precisely controlled deposition of size-selected TiO2 NCs produced by gas-phase aggregation in a special magnetron sputtering system. Carefully optimized aggregation length and Ar gas flow are used to control the size distribution, while a quadrupole mass filter provides precise in situ size selection (from 2 to 15 nm). Transmission electron microscopy studies reveal that NCs larger than a critical size (∼8 nm) have a crystalline core with an amorphous shell, while those smaller than the critical size are all amorphous. The TiO2 NCs so produced exhibit remarkable photoelectrochemical water splitting performance in spite of a small amount of material loading. NCs of three different sizes (4, 6, and 8 nm) deposited on H-terminated Si(100) substrates are tested for the photoelectrochemical catalytic performance, and significant enhancement in photocurrent density (0.8 mA/cm(2)) with decreasing NC size is observed with a low saturation voltage of -0.22 V vs Ag/AgCl (0.78 V vs RHE). The enhanced photoconductivity could be attributed to the increase in the specific surface area and increase in the number of active (defect) sites in the amorphous NCs. The unique advantages of the present technique will be further exploited to develop applications based on tunable, size-selected NCs.
Collapse
Affiliation(s)
- Saurabh Srivastava
- WATLab and Department of Chemistry, University of Waterloo , Waterloo, Ontario N2L3G1, Canada
| | | | | | | | | | | | | | | |
Collapse
|
20
|
Tong X, Yang P, Wang Y, Qin Y, Guo X. Enhanced photoelectrochemical water splitting performance of TiO2 nanotube arrays coated with an ultrathin nitrogen-doped carbon film by molecular layer deposition. NANOSCALE 2014; 6:6692-700. [PMID: 24816496 DOI: 10.1039/c4nr00602j] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Vertically oriented TiO2 nanotube arrays (TNTAs) were conformally coated with an ultrathin nitrogen-doped (N-doped) carbon film via the carbonization of a polyimide film deposited by molecular layer deposition and simultaneously hydrogenated, thereby creating a core/shell nanostructure with a precisely controllable shell thickness. The core/shell nanostructure provides a larger heterojunction interface to substantially reduce the recombination of photogenerated electron-hole pairs, and hydrogenation enhances solar absorption of TNTAs. In addition, the N-doped carbon film coating acts as a high catalytic active surface for oxygen evolution reaction, as well as a protective film to prevent hydrogen-treated TiO2 nanotube oxidation by electrolyte or air. As a result, the N-doped carbon film coated TNTAs displayed remarkably improved photocurrent and photostability. The TNTAs with a N-doped carbon film of ∼ 1 nm produces a current density of 3.6 mA cm(-2) at 0 V vs. Ag/AgCl under the illumination of AM 1.5 G (100 mW cm(-2)), which represents one of the highest values achieved with modified TNTAs. Therefore, we propose that ultrathin N-doped carbon film coating on materials is a viable approach to enhance their PEC water splitting performance.
Collapse
Affiliation(s)
- Xili Tong
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, PR China.
| | | | | | | | | |
Collapse
|
21
|
Nashed R, Szymanski P, El-Sayed MA, Allam NK. Self-assembled nanostructured photoanodes with staggered bandgap for efficient solar energy conversion. ACS NANO 2014; 8:4915-4923. [PMID: 24730704 DOI: 10.1021/nn5009066] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Vertically oriented Ta-W-O nanotube array films were fabricated via the anodization of Ta-W alloy foils in HF-containing electrolytes. HF concentration is a key parameter in achieving well-adhered nanotube array structure. X-ray photoelectron spectroscopy (XPS) and diffuse reflectance measurements confirm the staggered band-alignment between Ta2O5 and WO3, which facilitates the separation of charge carriers. The nanotubes made of Ta-W films containing 10% W showed 100-fold improvement in the measured photocurrent compared to pristine Ta2O5 upon their use to split water photoelectrochemically. This enhancement was related to the efficient charge transport and the red shift in absorption spectrum with increase of the W content, which was asserted by ultrafast transient absorption (TA) spectroscopy measurements. The TA measurements showed the elimination of trap states upon annealing Ta-W-O nanotubes and, hence, minimizing the charge carrier trapping, whereas the trap states remain in pristine Ta2O5 nanotubes even after annealing.
Collapse
Affiliation(s)
- Ramy Nashed
- Energy Materials Lab (EML), School of Sciences and Engineering, The American University in Cairo , New Cairo 11835, Egypt
| | | | | | | |
Collapse
|
22
|
Anodic Fabrication of Ti-Ni-O Nanotube Arrays on Shape Memory Alloy. MATERIALS 2014; 7:3262-3273. [PMID: 28788616 PMCID: PMC5453335 DOI: 10.3390/ma7043262] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Revised: 03/26/2014] [Accepted: 04/17/2014] [Indexed: 11/29/2022]
Abstract
Surface modification with oxide nanostructures is one of the efficient ways to improve physical or biomedical properties of shape memory alloys. This work reports a fabrication of highly ordered Ti-Ni-O nanotube arrays on Ti-Ni alloy substrates through pulse anodization in glycerol-based electrolytes. The effects of anodization parameters and the annealing process on the microstructures and surface morphology of Ti-Ni-O were studied using scanning electron microscope and Raman spectroscopy. The electrolyte type greatly affected the formation of nanotube arrays. A formation of anatase phase was found with the Ti-Ni-O nanotube arrays annealed at 450 °C. The oxide nanotubes could be crystallized to rutile phase after annealing treatment at 650 °C. The Ti-Ni-O nanotube arrays demonstrated an excellent thermal stability by keeping their nanotubular structures up to 650 °C.
Collapse
|
23
|
Allam NK, Shaheen BS, Hafez AM. Layered tantalum oxynitride nanorod array carpets for efficient photoelectrochemical conversion of solar energy: experimental and DFT insights. ACS APPLIED MATERIALS & INTERFACES 2014; 6:4609-4615. [PMID: 24666372 DOI: 10.1021/am500286n] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Anodically fabricated tantalum oxide (Ta2O5) nanorod array carpets are converted into the corresponding tantalum oxynitride (TaON) through nitridation in an ammonia atmosphere. The measured optical bandgap energy of TaON is ∼2.3 eV, which is also confirmed via the density functional theory calculations. When used to photoelectrochemically split water (AM 1.5G illumination, 1 M KOH, and 0.6 V applied DC bias), the multilayer nanorod films show visible-light incident photon conversion efficiencies (IPCE) as high as 7.5%. The enhanced photochemical activity is discussed in terms of the ordered one-dimensional morphology as well as the electron effective mass in TaON and Ta2O5.
Collapse
Affiliation(s)
- Nageh K Allam
- Energy Materials Laboratory (EML), Physics Department, School of Sciences and Engineering, The American University in Cairo , New Cairo 11835, Egypt
| | | | | |
Collapse
|
24
|
Tafen DN, Long R, Prezhdo OV. Dimensionality of nanoscale TiO2 determines the mechanism of photoinduced electron injection from a CdSe nanoparticle. NANO LETTERS 2014; 14:1790-1796. [PMID: 24611556 DOI: 10.1021/nl404352a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Assumptions about electron transfer (ET) mechanisms guide design of catalytic, photovoltaic, and electronic systems. We demonstrate that the mechanism of ET from a CdSe quantum dot (QD) into nanoscale TiO2 depends on TiO2 dimensionality. The injection into a TiO2 QD is adiabatic due to strong donor-acceptor coupling, arising from unsaturated chemical bonds on the QD surface, and low density of acceptor states. In contrast, the injection into a TiO2 nanobelt (NB) is nonadiabatic, because the state density is high, the donor-acceptor coupling is weak, and multiple phonons accommodate changes in the electronic energy. The CdSe adsorbant breaks symmetry of delocalized TiO2 NB states, relaxing coupling selection rules, and generating more ET channels. Both mechanisms can give efficient ultrafast injection. However, the dependence on system properties is very different for the two mechanisms, demonstrating that the fundamental principles leading to efficient charge separation depend strongly on the type of nanoscale material.
Collapse
Affiliation(s)
- De Nyago Tafen
- National Energy Technology Laboratory, 1450 Queen Avenue SW, Albany, Oregon 97321, United States
| | | | | |
Collapse
|
25
|
Suzuki TM, Kitahara G, Arai T, Matsuoka Y, Morikawa T. Nitrogen and transition-metal codoped titania nanotube arrays for visible-light-sensitive photoelectrochemical water oxidation. Chem Commun (Camb) 2014; 50:7614-6. [DOI: 10.1039/c4cc02571g] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
26
|
Lee K, Hahn R, Altomare M, Selli E, Schmuki P. Intrinsic Au decoration of growing TiO2 nanotubes and formation of a high-efficiency photocatalyst for H2 production. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2013; 25:6133-6137. [PMID: 23963835 DOI: 10.1002/adma.201302581] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 06/24/2013] [Indexed: 06/02/2023]
Abstract
Electrochemical anodization of low-concentration (0.02-0.2 at% Au) TiAu alloys in a fluoride electrolyte leads to self-organized TiO2 nanotubes that show a controllable, regular in situ decoration with elemental Au nanoclusters of ≈5 nm in diameter. The degree of self-decoration can be adjusted by the Au concentration in the alloy and the anodization time. Such Au particle decorated tubes show a high activity for photocatalytic H2 production from ethanol solutions.
Collapse
Affiliation(s)
- Kiyoung Lee
- Department of Materials Science and Engineering WW4-LKO, University of Erlangen-Nuremberg, Martensstrasse 7, D-91058, Erlangen, Germany
| | | | | | | | | |
Collapse
|
27
|
Photoelectrochemical properties of Fe-doped TiO2 nanotube arrays fabricated by anodization. J APPL ELECTROCHEM 2013. [DOI: 10.1007/s10800-013-0617-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
28
|
Smith YR, Ray RS, Carlson K, Sarma B, Misra M. Self-Ordered Titanium Dioxide Nanotube Arrays: Anodic Synthesis and Their Photo/Electro-Catalytic Applications. MATERIALS (BASEL, SWITZERLAND) 2013; 6:2892-2957. [PMID: 28811415 PMCID: PMC5521288 DOI: 10.3390/ma6072892] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 05/02/2013] [Accepted: 06/05/2013] [Indexed: 11/16/2022]
Abstract
Metal oxide nanotubes have become a widely investigated material, more specifically, self-organized titania nanotube arrays synthesized by electrochemical anodization. As a highly investigated material with a wide gamut of applications, the majority of published literature focuses on the solar-based applications of this material. The scope of this review summarizes some of the recent advances made using metal oxide nanotube arrays formed via anodization in solar-based applications. A general methodology for theoretical modeling of titania surfaces in solar applications is also presented.
Collapse
Affiliation(s)
- York R Smith
- Metallurgical Engineering Department, University of Utah, Salt Lake City, UT 84112, USA.
| | - Rupashree S Ray
- Metallurgical Engineering Department, University of Utah, Salt Lake City, UT 84112, USA.
| | - Krista Carlson
- Metallurgical Engineering Department, University of Utah, Salt Lake City, UT 84112, USA.
| | - Biplab Sarma
- Metallurgical Engineering Department, University of Utah, Salt Lake City, UT 84112, USA.
| | - Mano Misra
- Metallurgical Engineering Department, University of Utah, Salt Lake City, UT 84112, USA.
- Chemical Engineering Department, University of Utah, Salt Lake City, UT 84112, USA.
| |
Collapse
|
29
|
Allam NK, Deyab NM, Abdel Ghany N. Ternary Ti–Mo–Ni mixed oxide nanotube arrays as photoanode materials for efficient solar hydrogen production. Phys Chem Chem Phys 2013; 15:12274-82. [DOI: 10.1039/c3cp52076e] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|
30
|
Hassan N, Hashim M, Allam NK. ZnO nano-tetrapod photoanodes for enhanced solar-driven water splitting. Chem Phys Lett 2012. [DOI: 10.1016/j.cplett.2012.08.038] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
31
|
Chen HM, Chen CK, Chen CJ, Cheng LC, Wu PC, Cheng BH, Ho YZ, Tseng ML, Hsu YY, Chan TS, Lee JF, Liu RS, Tsai DP. Plasmon inducing effects for enhanced photoelectrochemical water splitting: X-ray absorption approach to electronic structures. ACS NANO 2012; 6:7362-72. [PMID: 22849358 DOI: 10.1021/nn3024877] [Citation(s) in RCA: 147] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Artificial photosynthesis using semiconductors has been investigated for more than three decades for the purpose of transferring solar energy into chemical fuels. Numerous studies have revealed that the introduction of plasmonic materials into photochemical reaction can substantially enhance the photo response to the solar splitting of water. Until recently, few systematic studies have provided clear evidence concerning how plasmon excitation and which factor dominates the solar splitting of water in photovoltaic devices. This work demonstrates the effects of plasmons upon an Au nanostructure-ZnO nanorods array as a photoanode. Several strategies have been successfully adopted to reveal the mutually independent contributions of various plasmonic effects under solar irradiation. These have clarified that the coupling of hot electrons that are formed by plasmons and the electromagnetic field can effectively increase the probability of a photochemical reaction in the splitting of water. These findings support a new approach to investigating localized plasmon-induced effects and charge separation in photoelectrochemical processes, and solar water splitting was used herein as platform to explore mechanisms of enhancement of surface plasmon resonance.
Collapse
Affiliation(s)
- Hao Ming Chen
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
32
|
Sharmoukh W, Allam NK. TiO₂ nanotube-based dye-sensitized solar cell using new photosensitizer with enhanced open-circuit voltage and fill factor. ACS APPLIED MATERIALS & INTERFACES 2012; 4:4413-8. [PMID: 22799457 DOI: 10.1021/am301089t] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
We report the synthesis and characterization of a high molar extinction coefficient ruthenium complex sensitizer (Ru (6,6'-(COOEt)(2)-2,2'-bpy)(2)(Cl)(2)). In conjugation with TiO(2) nanotube arrays as a photoactive material and iodine/iodate redox electrolyte, we fabricated efficient dye-sensitized solar cell device showing a conversion efficiency of 3.94% measured under the air mass 1.5 global (AM1.5G) sunlight. The solar cell device showed a reasonably high open circuit voltage (0.74 V) as well as a fill factor of 0.63.
Collapse
Affiliation(s)
- W Sharmoukh
- Department of Inorganic Chemistry, National Research Center, Dokki, Cairo 12622, Egypt
| | | |
Collapse
|
33
|
Ji IA, Park MJ, Jung JY, Choi MJ, Lee YW, Lee JH, Bang JH. One-Dimensional Core/Shell Structured TiO2/ZnO Heterojunction for Improved Photoelectrochemical Performance. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.7.2200] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
34
|
Some recent developments in photoelectrochemical water splitting using nanostructured TiO2: a short review. Theor Chem Acc 2012. [DOI: 10.1007/s00214-012-1202-2] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
35
|
Jun Y, Park JH, Kang MG. The preparation of highly ordered TiO2 nanotube arrays by an anodization method and their applications. Chem Commun (Camb) 2012; 48:6456-71. [DOI: 10.1039/c2cc30733b] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|