Context: The Au-TiONPs have a wide range of applications and can easily enter the cells. Due to their properties, they can cause toxicity.
Objective: It was aimed to test the toxic effects of Au-TiO NPs in the brain, heart, kidney and liver of rats in this work.
Materials And Methods: All used rats in this work were treated using diverse concentrations (doses) of NPs (100 and 200 mg/kg bw) for 21 days. SOD, CAT, AChE activities and MDA, HO, NO contents were evaluated in different organs.
Results: The Au-TiO NPs exposure induced biochemical changes in different organs of rats in view of oxidative stress and neurotoxicity by the alteration of the activity of the enzyme of neurotransmitter (AChE activity).
Conclusion: The Au-TiO NPs have the potential to interact with rat's biochemical status and cause undesirable effects. One of those damaging effects was oxidative stress and neurotoxicity.
Clinical Significance: The study signifies the impact of usage of Au-TiO NPs in the medical field for further exploration.
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http://dx.doi.org/10.1080/1354750X.2021.1878557 | DOI Listing |
Nanomaterials (Basel)
December 2024
Department of Chemistry, Dongguk University-Seoul Campus, 30 Pildong-ro 1-gil, Jung-gu, Seoul 04620, Republic of Korea.
The core@shell nanostars composed of star-like Au nanocores with TiO shells (Au@TiO NSs) are synthesized in a one-pot reaction without any reducing or surface-controlling agents. The Au@TiO NSs exhibit strong absorption in the UV region based on the interaction between the Au nanocore and the TiO shell, and this optochemical property leads to the efficient laser desorption/ionization time-of-flight mass spectrometry (LDI-TOF-MS) analysis of small molecules with low background interference and high reproducible mass signals compared with spherical Au nanoparticles (NPs). The limit of detection and dynamic range values of various analytes also improved with Au@TiO NSs compared with those obtained with spherical Au NPs.
View Article and Find Full Text PDFNanomaterials (Basel)
November 2024
Faculty of Petroleum Refining and Petrochemistry, Petroleum-Gas University of Ploiesti, 100680 Ploiesti, Romania.
The integration of noble metal nanoparticles (NPs) effectively modifies the electronic properties of semiconductor photocatalysts, leading to improved charge separation and enhanced photocatalytic performance. TiO nanorods decorated with Au NPs were successfully synthesized using a cost-effective, rapid microwave-assisted method in HO and HF media for methylene blue (MB) degradation under visible light illumination. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), N2 physisorption, and UV-vis spectroscopy were employed to characterize the structures, morphologies, compositions, and photoelectronic properties of the as-synthesized materials.
View Article and Find Full Text PDFACS Appl Mater Interfaces
November 2024
Dipartimento di Chimica, Università Degli Studi di Milano, Via C. Golgi 19, 20133 Milano, Italy.
The interplay on anatase TiO photoactivity between particle morphology and gold nanoparticles (NPs) deposition, via either deposition-precipitation (DP) or photodeposition (P), is here investigated by evaluating the photoactivity of Au modified anatase (Au/TiO) nanocrystals with either a pseudospherical shape or a nanosheet structure in both reduction and oxidation test reactions. The presence of Au NPs on the anatase surface only slightly affects its photoactivity in Cr(VI) reduction, which is kinetically limited by the anodic half-reaction, whereas a larger exposure of highly oxidant {001} facets is beneficial for overcoming this rate-determining step. In the photocatalytic oxidation of both formic acid, proceeding through a direct mechanism, and rhodamine B (RhB) on surface fluorinated photocatalysts, occurring through a hydroxyl-radical-mediated mechanism, the presence of gold NPs produces a significant photoactivity increase only with spherically shaped photocatalysts, mainly exposing {101} facets.
View Article and Find Full Text PDFChempluschem
October 2024
Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-osawa, Hachioji, Tokyo, 192-0397, Japan.
Au single atoms and clusters were stabilized on Mg-Al layered double hydroxide nanoparticles (LDH NPs), and the obtained Au@LDH NPs were supported on SiO and CeO. After hydrogen reduction, Au single atoms were found together with Au clusters on LDH/SiO. In contrast to Au single-atom catalysts which are deposited in metal vacancies of oxide supports, the LDH NPs stabilize very small Au species despite the absence of metal vacancies.
View Article and Find Full Text PDFRSC Adv
July 2024
PowerChina Huadong Engineering Corporation Limited Hangzhou 311122 P. R. China.
The photo-reduction of bromate (BrO ) has attracted much attention due to the carcinogenesis and genotoxicity of BrO in drinking water. In this study, a heterojunction photocatalyst was developed by depositing Au nanoparticles (NPs) onto P25 TiO NPs through a one-pot, solvent-thermal process. Due to the unique properties of Au, the Au NPs deposited on the TiO surface created a Schottky barrier between the metal and the semiconductor, leading to an effective separation of photo-generated charge carriers as the Au nanoparticles served as electron sinks.
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