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Putjuso T, Putjuso S, Karaphun A, Swatsitang E. Influence of Li concentration on structural, morphological and electrochemical properties of anatase-TiO 2 nanoparticles. Sci Rep 2024; 14:11200. [PMID: 38755425 PMCID: PMC11098815 DOI: 10.1038/s41598-024-61985-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Accepted: 05/13/2024] [Indexed: 05/18/2024] Open
Abstract
Lithium-doped anatase-TiO2 nanoparticles (LixTi1-xO2 NPs, x = 0, 0.05, 0.10, 0.15 and 0.20) could be synthesized by a simple sol-gel process. X-ray diffraction (XRD) results displayed the tetragonal (space group: I41/amd) of polycrystalline TiO2 anatase phase. The spectroscopy results of Raman and FT-IR confirmed the anatase phase of TiO2 through the specific modes of metal oxides vibration in the crystalline TiO2. Surfaces micrographs by scanning electron microscope (SEM) of agglomerated LixTi1-xO2 NPs showed a spongy like morphology. Transmission electron microscope (TEM) illustrated a cuboidal shape of dispersed NPs with particle size distributed in a narrow range 5-10 nm. Bruanauer Emmett-Teller (BET) results showed the increased surface area of LixTi1-xO2 NPs with increasing Li content. LixTi1-xO2 NPs (x = 0.05-0.20) working electrodes illustrated a pseudocapacitive behavior with excellent electrochemical properties through the whole cycles of GCD test. Interestingly, Li0.1Ti0.9O2 NPs electrode illustrated a high performance in terms of maximum specific capacitance 822 F g-1 at 1.5 A g-1 in 0.5 M Li2SO4 electrolyte, with excellent capacitive retention 92.6% after 5000 cycles GCD test.
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Affiliation(s)
- Thanin Putjuso
- Department of General Education (Physics and Mathematics), Faculty of Liberal Arts, Rajamangala University of Technology Rattanakosin, Wang Klai Kangwon Campus, Hua Hin , Prachuap Khiri Khan, 77110, Thailand
| | - Sasitorn Putjuso
- Department of General Education (Physics and Mathematics), Faculty of Liberal Arts, Rajamangala University of Technology Rattanakosin, Wang Klai Kangwon Campus, Hua Hin , Prachuap Khiri Khan, 77110, Thailand
| | - Attaphol Karaphun
- Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Ekaphan Swatsitang
- Department of Physics, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand.
- Institute of Nanomaterials Research and Innovation for Energy (IN-RIE), Khon Kaen University, Khon Kaen, 40002, Thailand.
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Toukabri K, Hejazi S, Shahsanaei M, Pour-Ali S, Kosari A, Butz B, Killian MS, Mohajernia S. Spontaneous Deposition of Single Platinum Atoms on Anatase TiO 2 for Photocatalytic H 2 Evolution. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:4661-4668. [PMID: 38375793 DOI: 10.1021/acs.langmuir.3c03316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/21/2024]
Abstract
Single-atom (SA) decoration has emerged as a frontier in catalysis due to its unique characteristics. Recently, decorated Pt single atoms on titania have shown promise in photocatalytic hydrogen evolution. In this work, we demonstrate that Pt SAs can spontaneously deposit on the surface, driven by electrostatic forces; the key is to determine the golden pH and surface potential. We conducted a comprehensive investigation into the influence of the pH of the deposition precursor on the spontaneous adsorption of Pt SAs onto TiO2 nanosheets (TiNSs). We introduced a straightforward pH-dependent and charge-dependent strategy for the solid electrostatic anchoring of Pt SAs on TiO2. Furthermore, we established that the level of Pt loading can be controlled by adjusting the precursor pH. X-ray photoelectron spectroscopy (XPS) and high-angle annular dark-field imaging scanning transmission electron microscopy (HAADF-STEM) were used to evaluate the Pt SA-decorated samples. Photocatalytic hydrogen production activity was assessed under ultraviolet (UV) (365 nm) irradiation. Notably, we found that at a pH of 8, slightly below the measured point of zero charge (PZC), a unique mixture of Pt clusters and single atoms was deposited on the surface of TiNSs. This unique composition significantly improved hydrogen production, resulting in ∼3.7 mL of hydrogen generated after 8 h of UV exposure by only 10 mg of the Pt-decorated TiNS (with Pt loadings of 0.12 at. %), which is ∼300 times higher than the undecorated TiNS.
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Affiliation(s)
- Kenza Toukabri
- Chemistry and Structure of Novel Materials, Department of Chemistry and Biology, University of Siegen, Paul-Bonatz-Str. 9-11, 57076 Siegen, Germany
| | - Sina Hejazi
- Chemistry and Structure of Novel Materials, Department of Chemistry and Biology, University of Siegen, Paul-Bonatz-Str. 9-11, 57076 Siegen, Germany
| | - Majid Shahsanaei
- Chemistry and Structure of Novel Materials, Department of Chemistry and Biology, University of Siegen, Paul-Bonatz-Str. 9-11, 57076 Siegen, Germany
| | - Sadegh Pour-Ali
- Faculty of Materials Engineering, Sahand University of Technology, P.O. Box 51335-1996 Tabriz, Iran
| | - Ali Kosari
- Debye Institute for Nanomaterials Science, Universiteit Utrecht, Princetonplein 5, NL 3548CC, Utrecht, The Netherlands
| | - Benjamin Butz
- Mechanical Engineering, University of Siegen, Paul-Bonatz-Str. 9-11, 57076 Siegen, Germany
| | - Manuela Sonja Killian
- Chemistry and Structure of Novel Materials, Department of Chemistry and Biology, University of Siegen, Paul-Bonatz-Str. 9-11, 57076 Siegen, Germany
| | - Shiva Mohajernia
- Chemistry and Structure of Novel Materials, Department of Chemistry and Biology, University of Siegen, Paul-Bonatz-Str. 9-11, 57076 Siegen, Germany
- Department of Chemical and Materials Engineering, Faculty of Engineering, University of Alberta, Edmonton, T6G 1H9 Alberta, Canada
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Moridi H, Gh AB. Sodium alginate/polyvinyl pyrrolidone/zinc oxide @silica Schiff-base nanofiber membrane for single and binary removal of copper and nickel cations from aqueous medium. RESEARCH ON CHEMICAL INTERMEDIATES 2022. [DOI: 10.1007/s11164-022-04834-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Single-Atom-Based Catalysts for Photocatalytic Water Splitting on TiO2 Nanostructures. Catalysts 2022. [DOI: 10.3390/catal12080905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
H2 generation from photocatalytic water splitting is one of the most promising approaches to producing cost-effective and sustainable fuel. Nanostructured TiO2 is a highly stable and efficient semiconductor photocatalyst for this purpose. The main drawback of TiO2 as a photocatalyst is the sluggish charge transfer on the surface of TiO2 that can be tackled to a great extent by the use of platinum group materials (PGM) as co-catalysts. However, the scarcity and high cost of the PGMs is one of the issues that prevent the widespread use of TiO2/PGM systems for photocatalytic H2 generation. Single-atom catalysts which are currently the frontline in the catalysis field can be a favorable path to overcome the scarcity and further advance the use of noble metals. More importantly, single-atom (SA) catalysts simultaneously have the advantage of homogenous and heterogeneous catalysts. This mini-review specifically focuses on the single atom decoration of TiO2 nanostructures for photocatalytic water splitting. The latest progress in fabrication, characterization, and application of single-atoms in photocatalytic H2 generation on TiO2 is reviewed.
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