Ionic liquid-supported synthesis of CeO2 nanoparticles and its enhanced ethanol gas sensing properties

Dao, Dung Van; Nguyen, Thuy Ngoc; Majhi, Sanjit Manohar; Adilbish, Ganpurev; Lee, Hu Jun; Yu, Yeon–Tae; Lee, In Hwan

doi:10.1016/j.matchemphys.2019.03.025

Cited by 38 publications

(6 citation statements)

References 48 publications

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“…The 3d 5/2 and 3d 3/2 spin–orbit states correspond to v and u. , The Ce 4+ ions contain three pairs of v–u, v″–u″, and v‴–u‴ peaks, while the Ce 3+ involves a couple of v′–u′, respectively (Figure S10). The Ce 3+ relevant concentration is determined by integrating Ce 3+ bands for the total area of Ce 3d spectrum, and all percentages are reported as mol % . Thereby, the highest quantity of Ce 3+ sites is obtained for ternary Au@CeO 2 /Gr 2.0 HNSs (approximately 26.58%), then binary Au@CeO 2 CSNSs (23.28%), and free-standing CeO 2 (11.42%) (Table S1, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Light-to-Hydrogen Improvement Based on Three-Factored Au@CeO₂/Gr Hierarchical Photocatalysts

et al. 2022

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Recently, various attempts have been made for light-to-fuels conversion, often with limited performance. Herein we report active and lasting three-factored hierarchical photocatalysts consisting of plasmon Au, ceria semiconductor, and graphene conductor for hydrogen production. The Au@CeO2/Gr2.0 entity (graphene outer shell thickness of 2.0 nm) under visible-light irradiation exhibits a colossal achievement (8.0 μmol mgcat –1 h–1), which is 2.2- and 14.3-fold higher than those of binary Au@CeO2 and free-standing CeO2 species, outperforming the currently available catalysts. Yet, it delivers a high maximum quantum yield efficiency of 38.4% at an incident wavelength of 560 nm. These improvements are unambiguously attributed to three indispensable effects: (1) the plasmon resonant energy is light-excited and transferred to produce hot electrons localizing near the surface of Au@CeO2, where (2) the high-surface-area Gr conductive shell will capture them to direct hydrogen evolution reactions, and (3) the active graphene hybridized on the defect-rich surface of Au@CeO2 favorably adsorbs hydrogen atoms, which all bring up thorough insight into the working of a ternary Au@CeO2/Gr catalyst system in terms of light-to-hydrogen conversion.

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Section: Resultsmentioning

confidence: 99%

Light-to-Hydrogen Improvement Based on Three-Factored Au@CeO₂/Gr Hierarchical Photocatalysts

et al. 2022

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“…However, apparently the interactions between the IL and the ceria nanoparticles are relatively high, making calcination (600 • C, 2 h) necessary for the removal of the IL. According to the authors, the resulting CeO 2 is phase-pure with no evidence for impurities [65].…”

Section: Copper Oxidementioning

confidence: 99%

Synthesis and Dissolution of Metal Oxides in Ionic Liquids and Deep Eutectic Solvents

Richter

Ruck

2019

Molecules

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Ionic liquids (ILs) and deep eutectic solvents (DESs) have proven to be suitable solvents and reactants for low-temperature reactions. To date, several attempts were made to apply this promising class of materials to metal oxide chemistry, which, conventionally, is performed at high temperatures. This review gives an overview about the scientific approaches of the synthesis as well as the dissolution of metal oxides in ILs and DESs. A wide range of metal oxides along with numerous ILs and DESs are covered by this research. With ILs and DESs being involved, many metal oxide phases as well as different particle morphologies were obtained by means of relatively simple reactions paths. By the development of acidic task-specific ILs and DESs, even difficultly soluble metal oxides were dissolved and, hence, made accessible for downstream chemistry. Especially the role of ILs in these reactions is in the focus of discussion.

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“…− is the favoured anion owing to its low cost and its competitive characteristic [8]. The exceptional physical and chemical properties of ionic liquids made them suitable for a large number of applications such as solvents for organic reactions and catalysis [13,14], generation materials with high conductivity [15], as electrolytes in electrochemistry [16,17], as antimicrobial agents [18,19], as anticorrosion coatings [20,21], as matrices for mass spectrometry [22], as stationary phases for chromatography [23,24], in supportive immobilization of enzymes [25,26], as antibacterial agent [11], in solar cells and fuel [27,28], in technologies of nanomaterials [29,30], and in separation technologies [31,32].…”

Section: Introductionmentioning

confidence: 99%

Ecofriendly microwave-assisted preparation, characterization and antitumor activity of some propylimidazolium-based Ionic liquids derivatives

Alqurashy

2020

Journal of Taibah University for Science

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An ecofriendly and efficient preparation of a set of a new 1-propylimidazolium-based ionic liquids (1-20) has been manufactured by using both microwave irradiation and conventional procedure. Different spectral analysis (FT-IR, mass spectra, NMR and elemental analysis) were utilized to examine the structures of the newly prepared ILs. The in vitro antitumor activities of all ILs (1-20) were investigated, using viability assay, towards HEPG-2, MCF7 and CACO2 Cells. Among all tested ILs, the 3-(3-phenylpropyl)-1-propyl-1H-imidazol-3-ium tetrafluoroborate (13) showed better activity towards human hepatocellular carcinoma (HEPG-2) and colon carcinoma (CACO2), while the 3-(3-phenoxypropyl)-1-propyl-1H-imidazol-3-ium tetrafluoroborate (20) exhibited low IC 50 values against human breast adenocarcinoma (MCF7) compared to the standard drug (5fluorouracil (5-FU)). Generally, all ILs 1-20 derivatives showed moderate cytotoxic activity against all tested cell lines.

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Ionic liquid-supported synthesis of CeO2 nanoparticles and its enhanced ethanol gas sensing properties

Cited by 38 publications

References 48 publications

Light-to-Hydrogen Improvement Based on Three-Factored Au@CeO₂/Gr Hierarchical Photocatalysts

Light-to-Hydrogen Improvement Based on Three-Factored Au@CeO₂/Gr Hierarchical Photocatalysts

Synthesis and Dissolution of Metal Oxides in Ionic Liquids and Deep Eutectic Solvents

Ecofriendly microwave-assisted preparation, characterization and antitumor activity of some propylimidazolium-based Ionic liquids derivatives

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Ionic liquid-supported synthesis of CeO2 nanoparticles and its enhanced ethanol gas sensing properties

Cited by 38 publications

References 48 publications

Light-to-Hydrogen Improvement Based on Three-Factored Au@CeO2/Gr Hierarchical Photocatalysts

Light-to-Hydrogen Improvement Based on Three-Factored Au@CeO2/Gr Hierarchical Photocatalysts

Synthesis and Dissolution of Metal Oxides in Ionic Liquids and Deep Eutectic Solvents

Ecofriendly microwave-assisted preparation, characterization and antitumor activity of some propylimidazolium-based Ionic liquids derivatives

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Product

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Light-to-Hydrogen Improvement Based on Three-Factored Au@CeO₂/Gr Hierarchical Photocatalysts

Light-to-Hydrogen Improvement Based on Three-Factored Au@CeO₂/Gr Hierarchical Photocatalysts