Understanding ligand–nanoparticle interactions for silica, ceria, and titania nanopowders

Lai, Yen-Chih; Lai, Chao-Shun; Tai, Jui-Ting; Nguyen, Thai Phuong; Wang, Hsuan-Lan; Lin, Chih‐Yuan; Tsai, Tung-Yu; Ho, H.P.; Wang, Po-Hsuan; Liao, Ying‐Chih; Tsai, De‐Hao

doi:10.1016/j.apt.2015.10.005

Cited by 15 publications

(2 citation statements)

References 39 publications

(72 reference statements)

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“…Methods of sol-gel chemistry do not require energy-consuming and expensive equipment; they are environmentally friendly and economically feasible, which is an advantage for the development of technologies of organosilica nanocomposite synthesis [ 9 ]. The sol-gel method is used in the engineered and controlled formation of ceramic nanopowders and to fabricate oxide, non-oxide, and composite nanopowders [ 10 , 11 , 12 , 13 ]. Two major classes of ORMOSIL depending on the kind of molecular bonds/interactions have been described: class I hybrids and class II hybrids [ 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Biocompatible Silica-Polyethylene Glycol-Based Composites for Immobilization of Microbial Cells by Sol-Gel Synthesis

et al. 2023

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Biocatalysts based on the methylotrophic yeast Ogataea polymorpha VKM Y-2559 immobilized in polymer-based nanocomposites for the treatment of methanol-containing wastewater were developed. The organosilica composites with different matrix-to-filler ratios derived from TEOS/MTES in the presence of PEG (SPEG-composite) and from silicon-polyethylene glycol (STPEG-composite) differ in the structure of the silicate phase and its distribution in the composite matrix. Methods of fluorescent and scanning microscopy first confirmed the formation of an organosilica shell around living yeast cells during sol-gel bio-STPEG-composite synthesis. Biosensors based on the yeast cells immobilized in STPEG- and SPEG-composites are characterized by effective operation: the coefficient of sensitivity is 0.85 ± 0.07 mgO2 × min−1 × mmol−1 and 0.87 ± 0.05 mgO2 × min−1 × mmol−1, and the long-term stability is 10 and 15 days, respectively. The encapsulated microbial cells are protected from UV radiation and the toxic action of heavy metal ions. Biofilters based on the developed biocatalysts are characterized by high effectiveness in the utilization of methanol-rich wastewater—their oxidative power reached 900 gO2/(m3 × cycle), and their purification degree was up to 60%.

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Section: Introductionmentioning

confidence: 99%

Biocompatible Silica-Polyethylene Glycol-Based Composites for Immobilization of Microbial Cells by Sol-Gel Synthesis

et al. 2023

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“…Several techniques such as X-ray diffraction (XRD), electron microscopy (EM), and electrospray-differential mobility analyses (ES-DMA) have been used to characterize TiO 2 particles (crystal type and size distribution). ,, However, these techniques cannot be used routinely for the rapid screening of large sample quantities. Single-particle inductively coupled plasma mass spectrometry (ICP-MS) can achieve sensitive size determination of TiO 2 particles but the technique is limited by the need for complicated procedures and high-level expertise by the user.…”

Section: Introductionmentioning

confidence: 99%

A Triple Functional Approach To Simultaneously Determine the Type, Concentration, and Size of Titanium Dioxide Particles

Zhao

Yang

Zhang

et al. 2018

Environ. Sci. Technol.

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The large-scale manufacturing and use of titanium dioxide (TiO) particles in food and consumer products significantly increase the likelihood of human exposure and release into the environment. We present a simple and innovative approach to rapidly identify the type (anatase or rutile), as well as to estimate, the size and concentration of TiO particles using Raman spectroscopy and surface-enhanced Raman spectroscopy (SERS). The identification and discrimination of rutile and anatase were based on their intrinsic Raman signatures. The concentration of the TiO particles was determined based on Raman peak intensity. Particle sizes were estimated based on the ratio between the Raman intensity of TiO and the SERS intensity of myricetin bound to the nanoparticles (NPs), which was proven to be independent of TiO nanoparticle concentrations. The ratio that was calculated from the 100 nm particles was used as a cutoff value when estimating the presence of nanosized particles within a mixture. We also demonstrated the practical use of this approach when determining the type, concentration, and size of E171: a mixture that contains TiO particles of various sizes which are commonly used in many food products as food additives. The presence of TiO anatase NPs in E171 was confirmed using the developed approach and was validated by transmission electron micrographs. TiO presence in pond water was also demonstrated to be an analytical capability of this method. Our approach shows great promise for the rapid screening of nanosized rutile and anatase TiO particles in complex matrixes. This approach will strongly improve the measurement of TiO quality during production, as well as the survey capacity and risk assessment of TiO NPs in food, consumer goods, and environmental samples.

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Colloidal stability and aggregation kinetics of nanocrystal CdSe/ZnS quantum dots in aqueous systems: effects of pH and organic ligands

Hassan

Pálmai

et al. 2020

J Nanopart Res

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Understanding ligand–nanoparticle interactions for silica, ceria, and titania nanopowders

Cited by 15 publications

References 39 publications

Biocompatible Silica-Polyethylene Glycol-Based Composites for Immobilization of Microbial Cells by Sol-Gel Synthesis

Biocompatible Silica-Polyethylene Glycol-Based Composites for Immobilization of Microbial Cells by Sol-Gel Synthesis

A Triple Functional Approach To Simultaneously Determine the Type, Concentration, and Size of Titanium Dioxide Particles

Colloidal stability and aggregation kinetics of nanocrystal CdSe/ZnS quantum dots in aqueous systems: effects of pH and organic ligands

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