Synthesis and color tuning of titanium oxide inorganic pigment by phase control and mixed-anion co-doping

Cao, Jindi; Hasegawa, Tetsuya; Sun, Peng; Yang, Shuo; Li, Bin; Cao, Wenbin; Yin, Shu

doi:10.1016/j.apt.2022.103576

Cited by 24 publications

(13 citation statements)

References 42 publications

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“…The presence of slight differences in the levels of the original valence bands of anatase, rutile, and brookite results in the formation of the colorful titanium oxide, such as red, cyan, and yellow-green can be realized. This result indicates that titanium oxide can be used as a colorful inorganic pigment, which is non-toxic without any other transition metal addition (Cao et al, 2022).…”

Section: Composition Crystal Phase Control and Functionality Of Titan...mentioning

confidence: 80%

“…The synthesis of anion-doped oxides by solvothermal reactions can be realized in a solution around 200 °C. Various crystal phases can be selectively synthesized, and no post-treatment is required, and anion dopants or dopants such as nitrogen, sulfur, and fluorine can be realized in one step (Cao et al, 2022;Yin and Asakura, 2019). In a typical synthesis process, a titanium compound (TiCl 3 ) is introduced in urea or hexamethylenetetramine (HMT) aqueous solution, followed by hydrothermal/solvothermal treatment at 190 °C.…”

Section: Composition Crystal Phase Control and Functionality Of Titan...mentioning

confidence: 99%

“…In addition, due to the toxicity of transition metal ions, safety risks are concerned when they are used as raw materials for cosmetics, etc. Applying mixed ions doping makes it possible to synthesize colorful titanium oxide without using transition metals except for titanium (Cao et al, 2022). It is known that titania possesses yellow color when nitrogen is doped at the oxygen site of the titania and shows gray color when the boron element is doped.…”

Section: Composition Crystal Phase Control and Functionality Of Titan...mentioning

confidence: 99%

“…Therefore, it has been accepted that the hydrothermal or solvothermal processes show great potential for improving the functionality of various materials, and offer many applications such as non-toxic pigments, photocatalysts, ultraviolet rays, and infrared shielding materials etc. (Cao et al, 2022;Guo et al, 2010;Hermawan et al, 2021;Taufik et al, 2020;Xue and Yin, 2022;Yin, 2015;Yin and Asakura, 2019). The liquid phase reactions proceed under mild conditions compared to high-temperature methods such as solid-phase reactions, which are environmentally friendly.…”

Section: Introductionmentioning

confidence: 99%

“…(Liu et al, 2012). In addition, for oxide materials, elements replaced by cations and anions in the material will significantly change their physical and chemical properties, and it is expected that new functionality of the material will be discovered, and the functionality of materials will be dramatically improved (Cao et al, 2022;Kageyama et al, 2018;Zhao et al, 2017). It is possible to synthesize oxides and nitrides with different morphologies and sizes via a topotactic method, using the precursors with controllable morphology and particle size synthesized from the solution process.…”

Section: Introductionmentioning

confidence: 99%

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Morphology Control of Transition Metal Oxides by Liquid-Phase Process and Their Material Development

Yin

Hasegawa

2023

KONA

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It is well known that the functionality of inorganic materials strongly depends on the chemical composition, morphology, particle size, crystal facet, etc., which are strongly influenced by the synthesis process. The precise control of the synthesis process is expected to lead to the discovery of new functionality and improvement of the functionality of materials. For example, in a high-temperature solid-phase reaction, it is difficult to control the morphology of nanocrystals. On the other hand, synthesizing functional materials using solution processes, such as hydrothermal and solvothermal reactions, makes it possible to control the morphology and particle size precisely. Usually, the solution process is strongly related to the dissolution reprecipitation mechanism. Therefore, the material composition can be strictly controlled and is suitable for forming fine particles with high crystallinity. In this review paper, the role of the solvent in the solution process, its effect on particle size and morphology of the transition metal oxide, and the related functional improvement will be focused. Furthermore, the direct formation of functional thin films by the solution process and the morphology control by non-oxide materials by the topotactic reaction will also be introduced.

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Section: Composition Crystal Phase Control and Functionality Of Titan...mentioning

confidence: 80%

Section: Composition Crystal Phase Control and Functionality Of Titan...mentioning

confidence: 99%

Section: Composition Crystal Phase Control and Functionality Of Titan...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Morphology Control of Transition Metal Oxides by Liquid-Phase Process and Their Material Development

Yin

Hasegawa

2023

KONA

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TiO₂ and ZnO Nanoparticles Immobilized on Magnetic Sulfonated Melamine‐Formaldehyde: Structure Identification and Performance as Recyclable Catalysts for the Biginelli Reaction

Jamshidifard,

Rezaei,

Farsadrooh

et al. 2024

ChemistrySelect

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Sulfonated melamine‐formaldehyde (SMF) containing high dispersed TiO2 and ZnO nanoparticles were fabricated into magnetic nanocomposites by two different method material incorporation protocols, including calcination and wet impregnation. Their catalytic performance was investigated toward Biginelli reaction. For the preparation of the first catalyst series, a two‐step protocol was used. Initially, Fe3O4 nanoparticles were coated with SMF (Fe3O4/SMF). Subsequently, they were decorated consecutively with TiO2 (Fe3O4/SMF/TiO2) and ZnO (Fe3O4/SMF/ZnO). The second set of catalysts was prepared using a two‐step process. Fe3O4 nanoparticles were first used to modify SMF (SMF/Fe3O4). Following the initial step, the surface of SMF/Fe3O4 was decorated with both TiO2 (SMF/Fe3O4/TiO2) and ZnO (SMF/Fe3O4/ZnO). To understand the characteristics of the synthesized nanocomposites, a variety of characterization techniques were employed. New catalysts enabled the rapid synthesis (30–45 min) of a range of biologically active 3,4‐dihydropyrimidinones based on the Biginelli reaction with high yields (70–95 % isolated).

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Highly hydrophobic cellulose acetate mats modified with poly(ethylene oxide-b-propylene oxide-b-ethylene oxide) triblock copolymer and TiO2 nanoparticles by electrospinning

Gomez-Hermoso-de-Mendoza

Gutierrez

Tercjak

2023

Cellulose

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Cellulose acetate (CA) mats modified with poly(ethylene oxide-b-propylene oxide-b-ethylene oxide) (PEO-b-PPO-b-PEO or EPE) and sol–gel synthesised titanium oxide (TiO2) nanoparticles were successfully fabricated by using electrospinning technique. Under the same preparation conditions, higher spinnability was achieved for EPE triblock copolymers modified mats. All fabricated mats showed a micrometric multilayer structure, which enabled layer-by-layer peeling. The addition of TiO2 nanoparticles facilitated the peeling process. The diameter of the fibres was ~ 3 times lower after the incorporation of sol–gel synthesised TiO2 nanoparticles. TEM images confirmed that under electrospinning conditions the PPO block domains were able to microphase separated from the PEO block/CA phase. Additionally, the introduction of sol–gel synthesised TiO2 nanoparticles led to an inorganic network formation with nanoparticle size equal to ~ 8 nm in diameter. Moreover, the addition of TiO2 nanoparticles increased the hydrophobicity of the mats and their self-cleaning ability, being more effective for TiO2/CA than for TiO2-EPE/CA due to the partial absorption of water by EPE triblock copolymer. Young’s modulus of fabricated mats improved drastically with the addition of TiO2 nanoparticles, as well as their physical integrity in polar and nonpolar solvents. Fabricated mats with enhanced spinnability, which maintain CA mat features as well as the properties associated with sol–gel synthesised TiO2 nanoparticles, can find a wide range of applications.

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Synthesis and color tuning of titanium oxide inorganic pigment by phase control and mixed-anion co-doping

Cited by 24 publications

References 42 publications

Morphology Control of Transition Metal Oxides by Liquid-Phase Process and Their Material Development

Morphology Control of Transition Metal Oxides by Liquid-Phase Process and Their Material Development

TiO₂ and ZnO Nanoparticles Immobilized on Magnetic Sulfonated Melamine‐Formaldehyde: Structure Identification and Performance as Recyclable Catalysts for the Biginelli Reaction

Highly hydrophobic cellulose acetate mats modified with poly(ethylene oxide-b-propylene oxide-b-ethylene oxide) triblock copolymer and TiO2 nanoparticles by electrospinning

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Synthesis and color tuning of titanium oxide inorganic pigment by phase control and mixed-anion co-doping

Cited by 24 publications

References 42 publications

Morphology Control of Transition Metal Oxides by Liquid-Phase Process and Their Material Development

Morphology Control of Transition Metal Oxides by Liquid-Phase Process and Their Material Development

TiO2 and ZnO Nanoparticles Immobilized on Magnetic Sulfonated Melamine‐Formaldehyde: Structure Identification and Performance as Recyclable Catalysts for the Biginelli Reaction

Highly hydrophobic cellulose acetate mats modified with poly(ethylene oxide-b-propylene oxide-b-ethylene oxide) triblock copolymer and TiO2 nanoparticles by electrospinning

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Product

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TiO₂ and ZnO Nanoparticles Immobilized on Magnetic Sulfonated Melamine‐Formaldehyde: Structure Identification and Performance as Recyclable Catalysts for the Biginelli Reaction