Size and Shape Tailoring of Titania Nanoparticles Synthesized by Solvothermal Route in Different Solvents

Roca, Román Alvarez; Leite, E. R.

doi:10.1111/jace.12078

Cited by 18 publications

(11 citation statements)

References 36 publications

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“…Also, the type II nanoparticles appeared to have formed superordinate structures (type III). Such multistep hierarchical growth mechanisms have already been observed for different materials, such as TiO 2 [ 23 ], ZnO [ 24 ], and Co [ 25 ]. For ZnO, Bamiduro et al had also found a merging process after stacks of several nanoplatelets formed [ 24 ].…”

Section: Resultsmentioning

confidence: 77%

Revealing the formation mechanism and band gap tuning of Sb₂S₃ nanoparticles

Joschko

Wafo

Malsi

et al. 2021

Beilstein J. Nanotechnol.

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Sb2S3 is a promising nanomaterial for application in solar cells and in the fields of electronics and optoelectronics. Herein, Sb2S3 nanoparticles were prepared via the hot-injection approach. In contrast to earlier work, the reaction temperature was decreased to 150 °C so that the reaction was slowed down and could be stopped at defined reaction stages. Thereby, the formation mechanism of the nanomaterial and the associated kinetics could be revealed. Based on morphological and structural analyses, it is suggested that seed particles (type 0) formed immediately after injecting the antimony precursor into the sulfur precursor. These seeds fused to form amorphous nanoparticles (type I) that contained a lower percentage of sulfur than that corresponding to the expected stoichiometric ratio of Sb2S3. The reason for this possibly lies in the formation of an oxygen- or carbon-containing intermediate during the seeding process. Afterward, the type I nanoparticles aggregated into larger amorphous nanoparticles (type II) in a second hierarchical assembly process and formed superordinate structures (type III). This process was followed by the crystallization of these particles and a layer-like growth of the crystalline particles by an Ostwald ripening process at the expense of the amorphous particles. It was demonstrated that the kinetic control of the reaction allowed tuning of the optical band gap of the amorphous nanoparticles in the range of 2.2–2.0 eV. On the contrary, the optical band gap of the crystalline particles decreased to a value of 1.7 eV and remained constant when the reaction progressed. Based on the proposed formation mechanism, future syntheses for Sb2S3 particles can be developed, allowing tuning of the particle properties in a broad range. In this way, the selective use of this material in a wide range of applications will become possible.

show abstract

Section: Resultsmentioning

confidence: 77%

Revealing the formation mechanism and band gap tuning of Sb₂S₃ nanoparticles

Joschko

Wafo

Malsi

et al. 2021

Beilstein J. Nanotechnol.

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show abstract

“…In this research, using a solvothermal process [24], we synthesized nc-TiO 2 anatase particles with mean diameter of 5.4 nm and evaluated their potential antifungal effect against planktonic cells of C. albicans without UV light. The nc-TiO 2 was structurally characterized by X-ray diffraction (XRD), FT-Raman spectroscopy and high-resolution transmission electron microscopy (HR-TEM).…”

Section: Introductionmentioning

confidence: 99%

Experimental and theoretical approach of nanocrystalline TiO2 with antifungal activity

Longo

Picon

Zamperini

et al. 2013

Chemical Physics Letters

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“…Also, the type II nanoparticles appear to have formed superordinated structures (type III). Such multistep hierarchical growth mechanisms were already observed for different materials such as TiO2 [23], ZnO [24], and Co [25]. For ZnO, Bamiduro et al also found a merging process after stacks of several nanoplatelets had formed [24].…”

Section: Morphology and Structurementioning

confidence: 65%

Revealing the formation mechanism and band gap tuning of Sb₂S₃ nanoparticles

Joschko¹,

Wafo²,

Malsi³

et al. 2021

Preprint

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Sb2S3 is a promising nanomaterial for application in solar cells and other fields of electronics and optoelectronics. Sb2S3 nanoparticles were prepared via the hot-injection approach. In contrast to earlier work, the reaction temperature was decreased to 150°C, so that the reaction was slowed down and could be stopped at defined reaction stages. Thereby, the formation mechanism of the nanomaterial and the associated kinetics could be revealed. Based on morphological and structural analysis, it is suggested that seed particles (type 0) form immediately after injecting the antimony precursor into the sulfur precursor. These seeds fuse to form amorphous nanoparticles (type I) that contain a lower percentage of sulfur than that corresponding to the expected stoichiometric ratio of Sb2S3. The reason for this possibly lies in the formation of an oxygen- or carbon-containing intermediate during the seeding process. Afterward, the type I nanoparticles aggregate into larger amorphous nanoparticles (type II) in a second hierarchical assembly process and form superordinated structures (type III). This process is followed by the crystallization of these particles and a layer-like growth of the crystalline particles by an Ostwald ripening process at the expense of the amorphous particles. It was demonstrated that the kinetic control of the reaction allows tuning of the optical bandgap of the amorphous nanoparticles in the range of 2.2 – 2.0 eV. On the contrary, the optical bandgap of the crystalline particles decreases to a value of 1.7 eV and remains constant when the reaction progresses. Based on the proposed formation mechanism, future syntheses for Sb2S3 particles can be developed, allowing tuning the particles' properties in a broad range. In this way, the selective use of this material in a wide range of applications will become possible.

show abstract

Size and Shape Tailoring of Titania Nanoparticles Synthesized by Solvothermal Route in Different Solvents

Cited by 18 publications

References 36 publications

Revealing the formation mechanism and band gap tuning of Sb₂S₃ nanoparticles

Revealing the formation mechanism and band gap tuning of Sb₂S₃ nanoparticles

Experimental and theoretical approach of nanocrystalline TiO2 with antifungal activity

Revealing the formation mechanism and band gap tuning of Sb₂S₃ nanoparticles

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Size and Shape Tailoring of Titania Nanoparticles Synthesized by Solvothermal Route in Different Solvents

Cited by 18 publications

References 36 publications

Revealing the formation mechanism and band gap tuning of Sb2S3 nanoparticles

Revealing the formation mechanism and band gap tuning of Sb2S3 nanoparticles

Experimental and theoretical approach of nanocrystalline TiO2 with antifungal activity

Revealing the formation mechanism and band gap tuning of Sb2S3 nanoparticles

Contact Info

Product

Resources

About

Revealing the formation mechanism and band gap tuning of Sb₂S₃ nanoparticles

Revealing the formation mechanism and band gap tuning of Sb₂S₃ nanoparticles

Revealing the formation mechanism and band gap tuning of Sb₂S₃ nanoparticles