scholarly journals Phytosynthesis of Titanium Dioxide Nanoparticles Using King of Bitter Andrographis paniculata and Its Embryonic Toxicology Evaluation and Biomedical Potential

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
S. Rajeshkumar ◽  
J. Santhoshkumar ◽  
Leta Tesfaye Jule ◽  
Krishnaraj Ramaswamy
Keyword(s):  
Titanium Dioxide ◽  
Green Synthesis ◽  
Tio2 Nanoparticles ◽  
Titanium Dioxide Nanoparticles ◽  
Spherical Shape ◽  
Andrographis Paniculata ◽  
Potential Hazard ◽  
Average Size ◽  
Herbal Plant ◽  
Biomedical Potential

Phytosynthesis particles are the efficient activity of biomedical and environmental. In this present study, the green synthesis of titanium dioxide (TiO2) nanoparticles using the king of bitter herbal plant Andrographis paniculata was synthesized and characterized using XRD, SEM, HRTEM, AFM, and antimicrobial, antioxidant, and antidiabetic activities. The size of the particles HRTEM shows 50 nm, and SEM shows the spherical shape, which reveals the synthesis of TiO2 nanoparticles. XRD spectrum shows crystallinity of nanoparticles, and an average size is calculated about 22.97 nm. The phytosynthesis TiO2 shows the antioxidant and antidiabetic activities. Similarly, toxicity studies have demonstrated the hatching and viability LD 50 value of TiO2 250 μg/L. The current study’s findings suggested that phytosynthesis TiO2 using extract of Andrographis paniculata exposure to potential hazard factors to biomedical and environmental uses.

scholarly journals Facile Green Synthesis and Characterization of Titanium Dioxide Nanoparticles Using Kigelia africana (Lam) Benth., Aqueous Leaf Extract and its Antioxidant and Antibacterial Activity

2022 ◽  
Vol 34 (2) ◽  
pp. 409-414
Author(s):  
N. Usha Rani ◽  
P. Pavani ◽  
P.T.S.R.K. Prasad Rao
Keyword(s):  
Titanium Dioxide ◽  
Green Synthesis ◽  
Tio2 Nanoparticles ◽  
Leaf Extract ◽  
Titanium Dioxide Nanoparticles ◽  
Average Particle Size ◽  
Radical Scavenging ◽  
Average Particle ◽  
Absorption Bands ◽  
Aqueous Leaf Extract

Titanium nanoparticles are toxic to bacteria and have a widespread applications in different fields of research. Hence the present study aimed to synthesize the titanium dioxide nanoparticles by adopting green synthesis methodology using Kigelia africana leave extract as a biological reducing agent. The UV absorption spectra show characteristic absorption maxima corresponding to TiO2 nanoparticles at a wavelength of 512 nm confirms the formation of nanosized tin particles. The FT-IR spectrum of TiO2 nanoparticles show absorption bands at 3609 cm-1 and 3227 cm-1 corresponding to O-H stretching in alcoholic and carboxylic compounds, respectively. Absorption peaks at 1607, 2834, 1654 and 1324 cm-1 correspond to aromatic C=C vibrations, C-H stretching in aldehydes, C-H bending vibrations and aromatic C-N stretching vibrations, respectively. This confirms the involvement of bioactive compounds from the plant extract. The SEM and EDX studies confirmed that the nanoparticles are spherical to oval shape with an average particle size of 46 nm. The metal content in the nanoparticles was found to be 58.71%. The synthesized nanoparticles have potential growth inhibition activity against Gram-negative bacteria (Pseudomonas aeruginosa and Escherichia coli). The DPPH radical scavenging activity of the nanoparticles synthesized was compared with that of aqueous leaf extract and standard ascorbic acid and proved that the nanoparticles have enhanced activity than aqueous leaf extract. The IC50 of the leaf extract, nanoparticles and the standard was found to be 31.55, 75.82 and 84.95 μg/mL, respectively. Kigelia africana leaf is shown in this work to be a valuable bioagent in the biosynthesis of TiO2 nanoparticles with increased biological activity.

scholarly journals Green synthesis of titanium dioxide nanoparticles using Psidium guajava extract and its antibacterial and antioxidant properties

2014 ◽  
Vol 7 (12) ◽  
pp. 968-976 ◽  
Author(s):  
Thirunavukkarasu Santhoshkumar ◽  
Abdul Abdul Rahuman ◽  
Chidambaram Jayaseelan ◽  
Govindasamy Rajakumar ◽  
Sampath Marimuthu ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Green Synthesis ◽  
Titanium Dioxide Nanoparticles ◽  
Antioxidant Properties ◽  
Psidium Guajava

Dispersion and stability of titanium dioxide nanoparticles in aqueous suspension: effects of ultrasonication and concentration

2013 ◽  
Vol 67 (1) ◽  
pp. 147-151 ◽  
Author(s):  
J. Qi ◽  
Y. Y. Ye ◽  
J. J. Wu ◽  
H. T. Wang ◽  
F. T. Li
Keyword(s):  
Titanium Dioxide ◽  
Zeta Potential ◽  
Tio2 Nanoparticles ◽  
Titanium Dioxide Nanoparticles ◽  
Aqueous Suspension ◽  
Solution Chemistry ◽  
Hydrodynamic Diameter ◽  
Nanoparticles Dispersion ◽  
Nanoparticles Concentration ◽  
Nanoparticles Suspension

The increasing applications of titanium dioxide (TiO2) nanoparticles raise concerns about their potential environmental impacts. To investigate the fate and transport of TiO2 nanoparticles in aqueous suspension, ultrasonication is widely used for the dispersion of TiO2 nanoparticles in laboratory-scale studies. There is a pressing need for detailed information on the dispersion and stability of TiO2 nanoparticles. This study investigated the change of size, zeta potential, and pH of TiO2 nanoparticles aqueous suspension under different conditions of ultrasonication and concentrations. It was found that the hydrodynamic diameter of TiO2 nanoparticles decreased with increasing suspension concentration and remained stable for more than 1 hour after sonication, which is enough for experimental research. The pH decreased with increasing nanoparticles concentration. Ultrasonication remarkably improved zeta potential to be above 15 mV for all the samples. Therefore, 20 minutes of ultrasonication (180 W) is sufficient for the dispersion of this rutile TiO2 nanoparticles suspension, which can remain stable for more than 1 hour. However, the optimum sonication time for TiO2 nanoparticles dispersion is influenced by many factors, such as TiO2 nanoparticles concentration, solution chemistry, and sonicator parameters.

scholarly journals Preparation and Characterisation of Poly(methyl metacrylate)-Titanium Dioxide Nanocomposites for Denture Bases

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2655
Author(s):  
Mariusz Cierech ◽  
Marcin Szerszeń ◽  
Jacek Wojnarowicz ◽  
Witold Łojkowski ◽  
Jolanta Kostrzewa-Janicka ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Titanium Dioxide Nanoparticles ◽  
Colour Change ◽  
Acrylic Resin ◽  
Considerable Change ◽  
Dental Prosthesis ◽  
Tio2 Nps ◽  
Eds Analysis ◽  
Colorimetric Test ◽  
Average Size

Introduction of titanium dioxide nanoparticles (TiO2 NPs) to poly(methyl methacrylate) (PMMA) aims to improve the mechanical, microbiological and tribological properties of dental prosthesis bases. The aim of the research was to assess the polymerisation time and the change in the colour of the new biomaterial. Samples with the 1 wt% and 2 wt% content of TiO2 additionally modified by ultrasounds were created. The effectiveness of ultrasounds was assessed by comparing the average size of conglomerates in a liquid acrylic resin monomer by means of a dynamic light scattering (DLS) analysis. The biomaterial structure was assessed by the energy-dispersive X-ray spectroscopy (EDS) analysis. The colour change was analysed by means of a colorimetric test and provided in the CIE (Commission internationale de l’éclairage) L*a*b* and RGB (Red Green Blue) colour palette. It was observed during the DLS test that the ultrasonic homogenisation process caused an increase in the suspension heterogeneity. The EDS analysis confirmed the presence of nanoparticles sized below 100 nm, which constitutes a ground for calling the new biomaterial a nanocomposite. The addition of TiO2 NPs as well as the ultrasounds result in the reduction of the average PMMA polymerisation time. The obtained data reveal that the addition of both 1 wt% and 2 wt% causes a considerable change in the PMMA colour: its whitening. To summarise, the reduced polymerisation time of the new biomaterial fully enables performance of standard procedures related to creation of dental prosthesis bases. Due to the considerable change in the colour, the clinical application is limited to performance of repairs or relining of the prosthesis, where the new material is located in an unaesthetic zone.

scholarly journals Ion-Trap Mass Spectrometric Analysis of Bisphenol A Interactions With Titanium Dioxide Nanoparticles and Milk Proteins

Molecules ◽  
2020 ◽  
Vol 25 (3) ◽  
pp. 708
Author(s):  
Edward P.C. Lai ◽  
Hendrik Kersten ◽  
Thorsten Benter
Keyword(s):  
Titanium Dioxide ◽  
Quantitative Analysis ◽  
Bisphenol A ◽  
Tio2 Nanoparticles ◽  
Ion Trap ◽  
Titanium Dioxide Nanoparticles ◽  
Milk Proteins ◽  
Sodium Formate ◽  
Spectrometric Analysis ◽  
Milk Whey

Quantitative analysis of endocrine-disrupting molecules such as bisphenol A (BPA) in freshwater to determine their widespread occurrence in environmental resources has been challenged by various adsorption and desorption processes. In this work, ion trap mass spectrometry (ITMS) analysis of BPA was aimed at studying its molecular interactions with titanium dioxide (TiO2) nanoparticles and milk whey proteins. Addition of sodium formate prevented TiO2 nanoparticles from sedimentation while enhancing the electrospray ionization (ESI) efficiency to produce an abundance of [BPA + Na]+ ions at m/z 251.0. More importantly, the ESI-ITMS instrument could operate properly during a direct infusion of nanoparticles up to 500 μg/mL without clogging the intake capillary. Milk protein adsorption of BPA could decrease the [BPA + Na]+ peak intensity significantly unless the proteins were partially removed by curdling to produce whey, which allowed BPA desorption during ESI for quantitative analysis by ITMS.

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