scholarly journals Organization of research team for nano-associated safety assessment in effort to study nanotoxicology of zinc oxide and silica nanoparticles

2014 ◽  
pp. 3 ◽  
Author(s):  
Seong Soo A. An ◽  
Yu-Ri Kim ◽  
Sung Ha Park ◽  
Jong-Kwon Lee ◽  
Jayoung Jeong ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Silica Nanoparticles ◽  
Safety Assessment ◽  
Research Team

scholarly journals Microsomal Glutathione Transferase 1 Protects Against Toxicity Induced by Silica Nanoparticles but Not by Zinc Oxide Nanoparticles

ACS Nano ◽  
2012 ◽  
Vol 6 (3) ◽  
pp. 1925-1938 ◽  
Author(s):  
Jingwen Shi ◽  
Hanna L. Karlsson ◽  
Katarina Johansson ◽  
Vladimir Gogvadze ◽  
Lisong Xiao ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Silica Nanoparticles ◽  
Zinc Oxide Nanoparticles ◽  
Glutathione Transferase ◽  
Oxide Nanoparticles ◽  
Microsomal Glutathione

scholarly journals Synthesis of Zinc Oxide, Titanium Dioxide and Magnesium Dioxide Nanoparticles and Their Prospective in Pharmaceutical and Biotechnological Applications

2021 ◽  
Vol 2 (1) ◽  
pp. 011-020
Author(s):  
Abhinav Shrivastava ◽  
Ravi Kant Singh ◽  
Pankaj Kumar Tyagi ◽  
Dilip Gore
Keyword(s):  
Zinc Oxide ◽  
Antibacterial Activity ◽  
Titanium Dioxide ◽  
Small Molecules ◽  
Safety Assessment ◽  
Biotechnological Applications ◽  
Zno Nps ◽  
Tio2 Nps ◽  
Titanium Dioxide Nanoparticle ◽  
Oxide Nanoparticle

The use of nanoparticles for the therapeutic purpose is gaining pronounced importance. In the last two decades, a number of nanomedicines received regulatory approval and several showed promises through clinical trials. In this content, it is important to synthesize nanoparticles from various sources and to check its efficiency, especially its antibacterial activity. In today’s scenario number nanomedicines are proving useful to control multidrug resistance and since the mechanism of action of nanoparticles is totally different from the small molecules like antibiotics it obviates the chances of drug resistance. In this review, we discussed three metal-based nanoparticles prepared from various reducing sources namely Zinc Oxide Nanoparticle (ZnO NPs), Titanium Dioxide Nanoparticle (TiO2 NPs) and Magnesium Dioxide Nanoparticle (MnO2 NPs). The focus also made towards the safety assessment of the several nanoparticles. In addition, the exact interaction of the nanoparticles with the bacterial cell surface and the resultant changes also been highlighted. The review put forward the sources, method, and antibacterial success of these nanoparticles so that future nanomedicines could be put forward.

Surface Modification and Functionalization of Oxide Nanoparticles for Superhydrophobic Applications

2011 ◽  
Vol 409 ◽  
pp. 469-473 ◽  
Author(s):  
Jean Denis Brassard ◽  
Dilip K. Sarkar ◽  
Jean Perron
Keyword(s):  
Thin Films ◽  
Zinc Oxide ◽  
Surface Modification ◽  
Stearic Acid ◽  
Silica Nanoparticles ◽  
Zno Nanoparticles ◽  
Ammonium Hydroxide ◽  
Contact Angles ◽  
Oxide Nanoparticles ◽  
X Ray Diffraction

Oxide nanoparticles have tremendous technological applications in the present days in diverse fields. In this study, the surface modification and functionalization of hydrophilic silica (SiO2) and zinc oxide (ZnO) nanoparticles were performed to obtain superhydrophobicity. Monodispersive nanoparticles of SiO2were prepared by Stöber process using tetraethoxysilane (Si (OC2H5)4) as a precursor and ammonium hydroxide as a catalyst in a ethanolic solution. The surface modification of the silica nanoparticles were performed using fluoroalkylsilane (FAS-17: C16H19F17O3Si) molecules to obtain fluorinated silica nanoparticles of diameter varying from 50nm to 300nm. On the other hand, surface modification of zinc oxide (ZnO) nanoparticles was performed using stearic acid (C18H36O2) molecules to obtain methylated ZnO nanoparticles. These functionalized nanoparticles were characterized both in the form of powder as well as thin films. The bonding characteristics of FAS-17 molecules with SiO2and stearic acid molecules with ZnO were investigated using Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). Nanostructured thin films of these functionalized oxide nanoparticles exhibit superhydrophobicity with contact angles over 150° with water roll-off properties. Such functionalized oxides nanoparticles, therefore, can be easily incorporated in coatings and paints for various applications in emerging technologies like biomedical applications, anti-corrosion, anti-icing, drag reduction and energy consumption reduction.

scholarly journals Photocatalytic decolorization of methylene blue using zinc oxide supported on mesoporous silica nanoparticles

2015 ◽  
Vol 11 (4) ◽  
Author(s):  
Anis Farhana Abdul Rahman ◽  
Ling Sy Mei ◽  
Aishah Abdul Jalil ◽  
Sugeng Triwahyono
Keyword(s):  
Methylene Blue ◽  
Zinc Oxide ◽  
Mesoporous Silica ◽  
Silica Nanoparticles ◽  
Heterogeneous Catalysts ◽  
Mechanical Stability ◽  
Uv Light ◽  
Mesoporous Silica Nanoparticles ◽  
High Surface ◽  
High Surface Area

Various dyes that are used in textile, paper, cosmetics and plastics industries may produce harmful effects on the health of living organisms and the environment if not treated properly before being discharged into water bodies. Among many techniques, photocatalytic process is one of the promising treatment for these dyes. Zinc oxide (ZnO) is well-known comparable with TiO2 due to its unique properties and numerous advantages. While, mesoporous silica nanoparticles (MSN) is an excellent solid support for heterogeneous catalysts due to its high surface area, thermal and mechanical stability, highly uniform pore distribution, tunable pore size, and unique hosting properties. Therefore, in this study, ZnO/MSN (ZM) catalysts were prepared and its physicochemical properties was characterized by X-Ray Diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR). The catalyst was tested on the photodecolorization of methylene blue (MB) dye. The results showed that the interaction between ZnO and MSN support could enhanced the photocatalytic activity. The 0.5 g L-1 of 5ZM was found to give the highest degradation (80 %) of 10 mg L-1 of MB solution at pH 7 after 3 h under UV light irradiation. The photodecolorization followed the pseudo first-order Langmuir-Hinshelwood kinetic model. This study demonstrated that the prepared 5ZM has a potential to be used in photocatalytic degradation of various dyes as well as organic pollutants.

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