Preparation and Characterization of Silica-modified Titanium Dioxide Nanoparticles by Co-precipitation Method

Phase transformation of TiO2 (titanium dioxide) nanoparticles has been analyzed by observing the effect of NaCl addition to the anatase-to-rutile phase transformation. NaCl is one of key points in the transformation of rutile. Co-precipitation method was employed in which TiCl3 as precursor was reacted with HCl 2M and subsequent NH4OH. Three methods were studied, namely solution without NaCl addition (TiCl3 + HCl + NH4OH) as control solution subjected to route A (TiCl3 + HCl – NaCl– NH4OH – heated at 600°C for 5 hours) and route B (TiCl3 + NaCl – heated 200°C for 5 hours – NH4OH – heated 200°C for 6 hours). Route B was subjected to heating at 200°C. The results show that without NaCl it enhanced the crystal growth of the rutile embryos allowing the ease of rutile formation at 600°C, while route A promoted the transformation of brookite and hindered anatase-to-rutile transformation as indicated by the presence of anatase at 1000°C. On the other hand route B is potential for being further explored.

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Characterization of Nanocrystalline Nickel Doped Titanium -Dioxide, Synthesized by Co Precipitation Method

INTERNATIONAL JOURNAL OF EMERGING TRENDS IN SCIENCE AND TECHNOLOGY ◽

10.18535/ijetst/v4i9.39 ◽

2017 ◽

Vol 4 (9) ◽

Author(s):

R. Sivasankari ◽

Keyword(s):

Titanium Dioxide ◽

Precipitation Method ◽

Nanocrystalline Nickel ◽

Doped Titanium Dioxide ◽

Co Precipitation

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Exploring the characterization of Ni doped MgO nanoparticles using co-precipitation method

Nanoscale Reports ◽

10.26524/nr.3.6 ◽

2020 ◽

Vol 3 (1) ◽

pp. 30-33

Author(s):

Muthulakshmi M ◽

Madhumitha G

Keyword(s):

Magnesium Oxide ◽

Analytical Techniques ◽

Nickel Chloride ◽

Precipitation Method ◽

Crystalline Powder ◽

High Melting Point ◽

Design Synthesis ◽

Mgo Nanoparticles ◽

Co Precipitation

Nanotechnology is a field of applied science focused on design, synthesis and characterization of nanomaterials. The nickel and magnesium have improved their applications in transparent electrodes and nano electronics. In addition, magnesium oxide has moisture resistance and high melting point properties. In the present work has been carried out in the development of green crystalline powder of nickel doped magnesium oxide nanoparticles by Co-precipitation method, from the mixture of nickel chloride and magnesium chloride with KOH as solvent. From the XRD results, crystalline size of the particle can be observed. Spherical structure of Ni doped MgO nanoparticles were indicated by SEM results and powdered composition of samples were obtained from FTIR. EDAX represents the peak composition of the nanoparticle. The above analytical techniques have confirmed that the Ni doped MgO nanoparticles obtained from the mixture of NiCl2 and MgCl2.

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Green synthesis and characterization of titanium dioxide nanoparticles using leaf extract of Pouteria campechiana and larvicidal and pupicidal activity on Aedes aegypti

Environmental Research ◽

10.1016/j.envres.2021.111333 ◽

2021 ◽

pp. 111333

Author(s):

Mathiyazhagan Narayanan ◽

P.Gokila Devi ◽

Devarajan Natarajan ◽

Sabariswaran Kandasamy ◽

Kesavan Devarayan ◽

...

Keyword(s):

Titanium Dioxide ◽

Aedes Aegypti ◽

Green Synthesis ◽

Leaf Extract ◽

Titanium Dioxide Nanoparticles ◽

Synthesis And Characterization

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Microstructure Characterization of Metal Mixed Oxides

MRS Advances ◽

10.1557/adv.2017.591 ◽

2017 ◽

Vol 2 (64) ◽

pp. 4025-4030 ◽

Cited By ~ 1

Author(s):

T. Kryshtab ◽

H. A. Calderon ◽

A. Kryvko

Keyword(s):

Mixed Oxides ◽

Profile Analysis ◽

Atomic Resolution ◽

Precipitation Method ◽

X Ray Diffraction ◽

Reconstruction Procedure ◽

Transmission Electron ◽

Xrd Patterns ◽

Co Precipitation

ABSTRACTThe microstructure of Ni-Mg-Al mixed oxides obtained by thermal decomposition of hydrotalcite-like compounds synthesized by a co-precipitation method has been studied by using X-ray diffraction (XRD) and atomic resolution transmission electron microscopy (TEM). XRD patterns revealed the formation of NixMg1-xO (x=0÷1), α-Al2O3 and traces of MgAl2O4 and NiAl2O4 phases. The peaks profile analysis indicated a small grain size, microdeformations and partial overlapping of peaks due to phases with different, but similar interplanar spacings. The microdeformations point out the presence of dislocations and the peaks shift associated with the presence of excess vacancies. The use of atomic resolution TEM made it possible to identify the phases, directly observe dislocations and demonstrate the vacancies excess. Atomic resolution TEM is achieved by applying an Exit Wave Reconstruction procedure with 40 low dose images taken at different defocus. The current results suggest that vacancies of metals are predominant in MgO (NiO) crystals and that vacancies of Oxygen are predominant in Al2O3 crystals.

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