Ultrasonic-assisted sol–gel synthesis of TiO2 nanostructures: Influence of synthesis parameters on morphology, crystallinity, and photocatalytic performance

Quintero, Yurieth; Mosquera, Edgar; Diosa, J.E.; Garcia, Amauri

doi:10.1007/s10971-020-05263-6

Cited by 41 publications

(33 citation statements)

References 44 publications

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“…The ultrasonication can be effectively combined with various synthetic techniques to achieve more fruitful results, such as electrochemical, [77] solvothermal [78,79], and sol-gel methods. [74,80,81] Mechanistically, the sonochemical effect generates the pressure during the reaction inside the reaction vessel and mixture because of the acoustic cavitation, which produces collapsing bubbles and ultimate pressure with high temperature as reported by Khan et al in the case of BiVO 4 . [79,82] This pressure, in turn, dissociates the water into reactive two primary radicals, i. e. H .…”

Section: Ultrasonic Assisted Synthesismentioning

confidence: 92%

“…Ultrasonication is an important and commercially adaptable protocol to synthesize a wide range of nanoarchitectures, including AuNPs. [58,74,75] While synthesizing morphologically controlled AuNPs, ultrasonic-assisted synthetic techniques could be preferentially selected, as it is cost-effective and produce a large scale product in a short time with excellent control of particle dispersion and size. This technique has produced AuNPs with morphologies like nanotubes, nanoprisms, nanocubes, etc.…”

Section: Ultrasonic Assisted Synthesismentioning

confidence: 99%

“…Unlike the seed‐mediated and other chemical preparation methods, here we do not need to use capping agents. The ultrasonication can be effectively combined with various synthetic techniques to achieve more fruitful results, such as electrochemical, [77] solvothermal [78,79], and sol‐gel methods [74,80,81] . Mechanistically, the sonochemical effect generates the pressure during the reaction inside the reaction vessel and mixture because of the acoustic cavitation, which produces collapsing bubbles and ultimate pressure with high temperature as reported by Khan et al.…”

Section: Ultrasonic Assisted Synthesismentioning

confidence: 99%

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Plasmonic Gold Nanoparticles (AuNPs): Properties, Synthesis and their Advanced Energy, Environmental and Biomedical Applications

Sarfraz

Khan

2021

Chemistry An Asian Journal

172

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Inducing plasmonic characteristics, primarily localized surface plasmon resonance (LSPR), in conventional AuNPs through particle size and shape control could lead to a significant enhancement in electrical, electrochemical, and optical properties. Synthetic protocols and versatile fabrication methods play pivotal roles to produced plasmonic gold nanoparticles (AuNPs), which can be employed in multipurpose energy, environmental and biomedical applications. The main focus of this review is to provide a comprehensive and tutorial overview of various synthetic methods to design highly plasmonic AuNPs, along with a brief essay to understand the experimental procedure for each technique. The latter part of the review is dedicated to the most advanced and recent solar-induced energy, environmental and biomedical applications. The synthesis methods are compared to identify the best possible synthetic route, which can be adopted while employing plasmonic AuNPs for a specific application. The tutorial nature of the review would be helpful not only for expert researchers but also for novices in the field of nanomaterial synthesis and utilization of plasmonic nanomaterials in various industries and technologies.

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Section: Ultrasonic Assisted Synthesismentioning

confidence: 92%

Section: Ultrasonic Assisted Synthesismentioning

confidence: 99%

Section: Ultrasonic Assisted Synthesismentioning

confidence: 99%

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Plasmonic Gold Nanoparticles (AuNPs): Properties, Synthesis and their Advanced Energy, Environmental and Biomedical Applications

Sarfraz

Khan

2021

Chemistry An Asian Journal

172

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“…The ultrasound is preferred for the synthesis of nanoparticles not only due to its simplicity and diverse applicability [35], but also due mixing of the constituent ions at the atomic level. Due to the mixing at atomic level, there is formation of amorphous phase [36] of nanoparticles which can be later transformed into the crystalline phase by simple annealing or calcination at a relatively lower temperature [37,38]. The ultrasonic irradiation causes cavitation in an aqueous medium, which can generate a temperature of around 5000 • C and a pressure of over 1800 kPa, which enables many unusual chemical reactions to occur [39].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Amorphous Iron Oxide Nanoparticles by the Sonochemical Method and Their Application for the Remediation of Heavy Metals from Wastewater

et al. 2020

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Nanoparticles have gained huge attention in the last decade due to their applications in electronics, medicine, and environmental clean-up. Iron oxide nanoparticles (IONPs) are widely used for the wastewater treatment due to their recyclable nature and easy manipulation by an external magnetic field. Here, in the present research work, iron oxide nanoparticles were synthesized by the sonochemical method by using precursors of ferrous sulfate and ferric chloride at 70 °C for one hour in an ultrasonicator. The synthesized iron oxide nanoparticles were characterized by diffraction light scattering (DLS), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), electron diffraction spectroscopy (EDS), high-resolution transmission electron microscopy (HRTEM) and vibrating sample magnetometer (VSM). The FTIR analysis exhibits characteristic absorption bands of IONPs at 400–800 cm−1, while the Raman spectra showed three characteristic bands at 273, 675, and 1379 cm−1 for the synthesized IONPs. The XRD data revealed three major intensity peaks at two theta, 33°, 35°, and 64° which indicated the presence of maghemite and magnetite phase. The size of the spherical shaped IONPs was varying from 9–70 nm with an average size of 38.9 nm while the size of cuboidal shaped particle size was in microns. The purity of the synthesized IONPs was confirmed by the EDS attached to the FESEM, which clearly show sharp peaks for Fe and O, while the magnetic behavior of the IONPs was confirmed by the VSM measurement and the magnetization was 2.43 emu/g. The batch adsorption study of lead (Pb) and chromium (Cr) from 20% fly ash aqueous solutions was carried out by using 0.6 mg/100 mL IONPs, which exhibited maximum removal efficiency i.e., 97.96% and 82.8% for Pb2+ and Cr ions, respectively. The fly ash are being used in making cements, tiles, bricks, bio fertilizers etc., where the presence of fly ash is undesired property which has to be either removed or will be brought up to the value of acceptable level in the fly ash. Therefore, the synthesized IONPs, can be applied in the elimination of heavy metals and other undesired elements from fly ash with a short period of time. Moreover, the IONPs that have been used as a nanoadsorbent can be recovered from the reaction mixture by applying an external magnetic field that can be recycled and reused. Therefore, this study can be effective in all the fly ash-based industries for elimination of the undesired elements, while recyclability and reusable nature of IONPs will make the whole adsorption or elimination process much economical.

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“…Among the numerous semiconductor photocatalysts, titanium dioxide (mainly in the polymorphic modification of anatase) occupies a special place due to its high photocatalytic activity, physical and chemical stability, non-corrosiveness, non-toxicity, availability and relatively low price [1][2][3][4]. One of the main goals of scientific research aimed at increasing the efficiency of the practical use of anatase is to improve its interaction with electromagnetic radiation (ultraviolet and visible) and adsorbed pollutants as a factor of high photocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Obtaining and Properties of a Photocatalytic Composite Material of the “SiO2–TiO2” System Based on Various Types of Silica Raw Materials

et al. 2021

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Compositions and technology for obtaining a photocatalytic composite material (PCM) by deposition of titanium dioxide particles synthesized by the sol–gel method on a silica support of various types (microsilica, gaize and diatomite) have been developed. The properties (chemical and mineral composition, dispersion, specific surface area, porosity, ζ-potential, acid–base properties, and microstructure) of microsilica, gaize and diatomite were studied to assess the effectiveness of using a photocatalytic agent as a carrier. In terms of specific viscosity (ηsp = 45), the concentration of the precursor (tetrabutoxytitanium—TBT) is set at 22 vol. % in a solvent (ethanol), at which it is possible to obtain the maximum amount of dissolved film oligomer without the formation of an aggregate-like precipitate. Modification of the reaction mixture (precursor: ethanol = 1:3) by replacing part of the solvent with a Span-60 surfactant/TBT = 1–1.1 made it possible to obtain polydisperse titanium dioxide particles with peak sizes of 43 nm and 690 nm according to laser granulometry data. Taking into account the interaction of titanium complexes with the surface of a silica support, a phenomenological model of the processes of structure formation of a photocatalytic composite material is proposed. By the value of the decomposition of rhodamine B, the photocatalytic activity of the developed composite materials was determined: PCM based on diatomite—86%; PCM based on microsilica—85%; PCM based on gaize—57%.

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Ultrasonic-assisted sol–gel synthesis of TiO2 nanostructures: Influence of synthesis parameters on morphology, crystallinity, and photocatalytic performance

Cited by 41 publications

References 44 publications

Plasmonic Gold Nanoparticles (AuNPs): Properties, Synthesis and their Advanced Energy, Environmental and Biomedical Applications

Plasmonic Gold Nanoparticles (AuNPs): Properties, Synthesis and their Advanced Energy, Environmental and Biomedical Applications

Synthesis and Characterization of Amorphous Iron Oxide Nanoparticles by the Sonochemical Method and Their Application for the Remediation of Heavy Metals from Wastewater

Obtaining and Properties of a Photocatalytic Composite Material of the “SiO2–TiO2” System Based on Various Types of Silica Raw Materials

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