Upconversion metal (Zr, Hf, and Ta) oxide aerogels

Kiselev, Grigorii O.; Kiseleva, Aleksandra; Ilatovskii, Daniil A.; Koshevaya, Ekaterina D.; Nazarovskaia, Daria; Gets, Dmitry; Vinogradov, Vladimir V.; Krivoshapkin, Pavel V.; Krivoshapkina, Elena F.

doi:10.1039/c9cc02452b

Cited by 11 publications

(16 citation statements)

References 32 publications

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“…At first, an inorganic polymer is formed through the hydrolysis of the precursor, polymerization, and polycondensation, leading to the formation of the metal oxide. The most challenging and crucial factor is the hydrolysis reaction rate . The esterification of glacial acetic acid and IPA led to the gradual production of water in situ .…”

Section: Resultsmentioning

confidence: 99%

“…Hafnium oxide NPs were synthesized through a sol–gel route and dried in supercritical CO 2 . Drying in such conditions enables us to avoid the collapse of the material’s pore structure and hence the degradation of the final characteristics.…”

Section: Methodsmentioning

confidence: 99%

“…Finally, the polymer was dried under vacuum for 24 h and stored under nitrogen. 1 25 Drying in such conditions enables us to avoid the collapse of the material's pore structure and hence the degradation of the final characteristics. At first, controlled hydrolysis and esterification were performed to obtain a sol−gel of HfO 2 .…”

Section: Methodsmentioning

confidence: 99%

“…The most challenging and crucial factor is the hydrolysis reaction rate. 25 The esterification of glacial acetic acid and IPA led to the gradual production of water in situ. The reaction was conducted in an inert atmosphere in a glovebox to eliminate excess water.…”

Section: Synthesis and Characterization Of Thementioning

confidence: 99%

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Hafnium Oxide-Based Nanoplatform for Combined Chemoradiotherapy

Sherstiuk

Tsymbal

Fakhardo

et al. 2021

ACS Biomater. Sci. Eng.

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Recently, the combined therapy has become one of the main approaches in cancer treatment. Combining different approaches may provide a significant outcome by triggering several death mechanisms or causing increased damage of tumor cells without hurting healthy ones. The supramolecular nanoplatform based on a high-Z metal reported here is a suitable system for the targeted delivery of chemotherapeutic compounds, imaging, and an enhanced radiotherapy outcome. HfO2 nanoparticles coated with oleic acid and a monomethoxypoly(ethylene glycol)-poly(ε-caprolactone) copolymer shell (nanoplatform) are able to accumulate inside cancer cells and release doxorubicin (DOX) under specific conditions. Neither uncoated nor coated nanoparticles show any cytotoxicity in vitro. DOX loaded onto a nanoplatform demonstrates a lower IC50 value than pure DOX. X-ray irradiation of cancer cells loaded with a nanoplatform shows a higher death rate than that for cells without nanoparticles. These results provide an important foundation for the development of complex nanoscale systems for combined cancer treatment.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Synthesis and Characterization Of Thementioning

confidence: 99%

See 2 more Smart Citations

Hafnium Oxide-Based Nanoplatform for Combined Chemoradiotherapy

Sherstiuk

Tsymbal

Fakhardo

et al. 2021

ACS Biomater. Sci. Eng.

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“…Different types of inorganic coatings can be created depending on the precursors used. For example, the hydrolysis of titanium isopropoxide resulted in a titanium dioxide matrix (Kim et al, 2011 ; Li et al, 2011 ; Hamid et al, 2014 ; Ge et al, 2015 ); iron (III) nitrate–iron (III) oxide matrix (Sun et al, 2005 , 2018 ; Hassan et al, 2013 ; Wan et al, 2015 ); and also probably the creation of ZrO 2 , HfO 2 , and Ta 2 O 5 oxide gels (Miller and Ko, 1996 ; Benad et al, 2018 ; Kiselev et al, 2019 ). Fixing elemental oxide on CNTs or CNFs surfaces changes hybrid materials characteristics.…”

Section: Synthesis Of Hybrid Materialsmentioning

confidence: 99%

Hybrid Materials Based on Carbon Nanotubes and Nanofibers for Environmental Applications

et al. 2020

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With the advances in material science, hybrid nanomaterials with unique mechanical, electrical, thermal and optical characteristics have been developed. Among them, hybrids based on filamentous forms of carbon, such as carbon nanotubes and carbon nanofibers, in combination with inorganic nanoparticles attract particular attention. Due to the structure and morphology, charge and energy transfer processes lead to synergistic effects that allow the use of less material with higher productivity. To clarify these issues, this review will summarize and discuss the relevant studies of the use of inorganic compounds of various chemical groups in modifying carbon nanomaterials for ecological applications.

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Contemporary and Looming Applications of Carbon Nanotubes

Jain

Negi

2023

Macromolecular Symposia

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Molding the future with the use of new technology is utmost important for the progress of human race. Nanotechnologies are the emerging field. Carbon nanotubes (CNTs) are the widely known substances used mostly in all types of the application such as catalysts, absorbents for water treatment, photocatalysis. Various methods of synthesis of CNTs are known, but in this paper, as a case study, green process synthesis has been discussed in CNTs. Different six stages in the life cycle of CNTs have been discussed in the paper that relates to different risk factors in the field. Synchronization of science and technology is important for usage of the materials. This paper provides more brief holistic view of the state of the CNTs at various fields. The attention of this study is also on the toxicity, bioaccumulation, and safety concerns as well as the remedial capabilities

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Upconversion metal (Zr, Hf, and Ta) oxide aerogels

Abstract: We report here a new feasible approach to produce upconversion luminescent metal oxide aerogels with high textural characteristics. Monolithic aerogels show upconversion luminescence converting near-infra red excitation into visible light emission.

Cited by 11 publications

References 32 publications

Hafnium Oxide-Based Nanoplatform for Combined Chemoradiotherapy

Hafnium Oxide-Based Nanoplatform for Combined Chemoradiotherapy

Hybrid Materials Based on Carbon Nanotubes and Nanofibers for Environmental Applications

Contemporary and Looming Applications of Carbon Nanotubes

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