scholarly journals Synthesis and Characterization of Magnetic Nanomaterials with Adsorptive Properties of Arsenic Ions

Molecules ◽  
2020 ◽  
Vol 25 (18) ◽  
pp. 4117
Author(s):  
Agnieszka Wojciechowska ◽  
Zofia Lendzion-Bieluń
Keyword(s):  
Titanium Dioxide ◽  
Titanium Dioxide Nanoparticles ◽  
Synthesis Method ◽  
Magnetic Nanomaterials ◽  
Molar Ratio ◽  
Magnetic Adsorbents ◽  
New Synthesis ◽  
Removal Of Arsenic ◽  
20 Nm ◽  
Adsorptive Properties

A new synthesis method of hybrid Fe3O4/C/TiO2 structures was developed using microwave-assisted coprecipitation. The aim of the study was to examine the effect of the addition of glucose and titanium dioxide on adsorptive properties enabling removal of arsenic ions from the solution. The study involved the synthesis of pure magnetite, magnetite modified with glucose and magnetite modified with glucose and titanium dioxide in magnetite: glucose: titanium dioxide molar ratio 1:0.2:3. Materials were characterized by XRD, FT-IR, and BET methods. Magnetite and titanium dioxide nanoparticles were below 20 nm in size in obtained structures. The specific surface area of pure magnetite was approximately 79 m2/g while that of magnetite modified with titanium dioxide was above 190 m2/g. Obtained materials were examined as adsorbents used for removal As(V) ions from aqueous solutions. Adsorption of arsenic ions by pure magnetite and magnetite modified with titanium dioxide was very high, above 90% (initial concentration 10 mg/L), pH in the range from 2 to 7. The preparation of magnetic adsorbents with a high adsorption capacity of As(V) ions was developed (in the range from 19.34 to 11.83 mg/g). Magnetic properties enable the easy separation of an adsorbent from a solution, following adsorption.

Preparation and Research of Skeletal Pt-C Compounds

2018 ◽  
Vol 937 ◽  
pp. 83-87 ◽  
Author(s):  
Xin Ling Hu ◽  
Ying Jiang Qian ◽  
Dong Xu Li ◽  
Xiao Min Chen
Keyword(s):  
Optical Properties ◽  
Synthesis Method ◽  
Polymerization Reaction ◽  
Molar Ratio ◽  
Excellent Performance ◽  
Electrical And Optical Properties ◽  
Cermet Material ◽  
New Synthesis ◽  
New Ideas ◽  
New Type

Platinum matrix composite is a new type of functional pottery material, which has excellent mechanical, electrical and optical properties. Due to the complexity of the synthesis method and the expensive equipment, the development of cermet material is extremely slow, so that the method to solve the problem is urgently needed. In view of the excellent performance of the Pt-C compounds, by hydrothermal method and high temperature roasting method, a new synthesis method for the composite is proposed using melamine and four platinum chloride at 60 °C by the polymerization reaction with a molar ratio of 20:1. The synthetic of Pt-C compounds provides a new synthesis method and new ideas and at the same time the Pt-C compounds has excellent performance, showing the excellent applications in machining.

Investigation of The Use of Titanium Dioxide Nanoparticles in Solar Cells

2020 ◽  
Vol 4 (1) ◽  
pp. 11-20
Author(s):  
Chen Luo ◽  
Jingting Li ◽  
Jie Xu
Keyword(s):  
Titanium Dioxide ◽  
Solar Cells ◽  
Electronic Device ◽  
Titanium Dioxide Nanoparticles ◽  
Synthesis Method ◽  
Nanoparticle Synthesis ◽  
Chemical Properties ◽  
Volume Ratio ◽  
Photochemical Reactions ◽  
Physical And Chemical

Today, nanoparticles have attracted the attention of many researchers due to their special properties as well as their many technological applications. Among these, titanium dioxide nanoparticles have many important applications in various industries due to their excellent optical, electrical and catalytic properties. These applications include use in industrial pigments, as photocatalysts in environmental cleansing, in sunscreens to protect the skin, in photovoltaic applications for solar cells, sensors, in electronic device components, and many more. Two important properties of this material that make it very efficient and useful in life are its photocatalytic and superhydrophobic properties. These two properties are used to purify water and wastewater, eliminate air pollution and buildings, accelerate photochemical reactions such as hydrogen production, fabricate surfaces and layers and self-cleaning glass. The properties of titanium dioxide nanoparticles are strongly dependent on the size of the doped particles, elements or compounds and the surface modifications made on them, which in turn are influenced by the nanoparticle synthesis method. For this reason, methods for the synthesis of titanium dioxide nanoparticles have received much attention today. As the size of the material gets smaller and smaller and reaches the nanoscale, new physical and chemical properties show up. Among the unique properties of nanomaterials, the motion of electrons and holes in semiconductor nanomaterials is dominated by quantum constraint, and the transfer properties of phonons and photons are strongly influenced by the size and geometry of the material. The effective surface area and surface to volume ratio increase with decreasing the material size. High effective levels are achieved by small particles, which will be useful in many 2TiO-based types of equipment in which the interaction of the common surface of the material is important.

scholarly journals Novel Green Micro-Synthesis of Graphene-Titanium Dioxide Nano- Composites with Photo-Electrochemical Properties

2019 ◽  
Vol 15 (6) ◽  
pp. 606-617
Author(s):  
Nourwanda M. Serour ◽  
Ahmed S.E. Hammad ◽  
Ahmed H. El-Shazly ◽  
Dina A. El-Gayar ◽  
Shaaban A. Nosier
Keyword(s):  
Titanium Dioxide ◽  
Titanium Dioxide Nanoparticles ◽  
Anatase Phase ◽  
Synthesis Method ◽  
Spherical Particles ◽  
Homogeneous Distribution ◽  
Graphene Sheets ◽  
One Pot ◽  
Novel Method ◽  
Nano Titanium Dioxide

Background: Graphene-Titanium dioxide nano-composite forms a very promising material in the field of photo-electrochemical research. Methods: In this study, a novel environment-friendly synthesis method was developed to produce well-distributed anatase nano-titanium dioxide spherical particles on the surface of graphene sheets. This novel method has great advantages over previously developed methods of producing graphenetitanium dioxide nanocomposites (GTNCs). High calcination temperature 650°C was used in the preparation of nano titanium dioxide, and chemical exfoliation for graphene synthesis and GTNC was performed by our novel method of depositing titanium dioxide nanoparticles on graphene sheets using a Y-shaped micro-reactor under a controlled pumping rate with minimal use of chemicals. Results: The physiochemical and crystallographic properties of the GTNC were confirmed by TEM, XRD, FTIR and EDX measurements, confirming process repeatability. Spherical nano-titanium dioxide was produced in the anatase phase with very high crystallinity and small particle diameters ranging from 9 nm to 25 nm, also the as prepared graphene (RGO) exhibited minimal flake folding and a high carbon content of 81.28% with a low oxygen-to-carbon atomic ratio of 0.172 and GTNCs produced by our novel method had a superior loading content, a homogeneous distribution and a 96.6% higher content of titanium dioxide particles on the graphene sheets compared with GTNCs prepared with the one-pot method. Conclusion: For its photoelectrochemical properties, chronoamperometry showed that GTNC sample (2) had a higher peak current of 60 μA compared with that of GTNC sample (1), which indicates that the separation and transfer of electron-hole pairs are better in the case of GTNC sample (2) and according to the LSV results, the generation of photocurrent in the samples can be observed through multiple on-off cycles, which indicates that the electrodes are stable and that the photocurrent is quite reversible.

scholarly journals Study of the Bandgap of Synthesized Titanium Dioxide Nanoparticules Using the Sol-Gel Method and a Hydrothermal Treatment

2009 ◽  
Vol 4 (1) ◽  
pp. 9-14 ◽  
Author(s):  
Sergio Valencia ◽  
Juan Miguel Marín ◽  
Gloria Restrepo
Keyword(s):  
Titanium Dioxide ◽  
Hydrothermal Treatment ◽  
Diffuse Reflectance Spectroscopy ◽  
Titanium Dioxide Nanoparticles ◽  
Anatase Phase ◽  
Sol Gel ◽  
Molar Ratio ◽  
Bandgap Energy ◽  
Gel Method ◽  
Sol Gel Method

In this work optical properties of titanium dioxide nanoparticles were studied. Titanium dioxide nanoparticles were synthesized by the sol-gel method followed by a hydrothermal treatment using tetraisopropyl orthotitanate (TIOT) and 2-propanol. The synthesized samples were characterized by X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (UV/DRS) and nitrogen adsorption-desorption methods. The bandgap energy was obtained using the Kubelka-Munk reemission function. The catalyst synthesized with a molar ratio of R1 (water/TIOT) = 3.5 and R2 (2-propanol/TIOT) = 15 has a predominately anatase phase. It also has a high photo degradation of methyl orange compared to TiO2 Degussa P-25. A shift band gap energy of 3.27 was observed

Aerosol inhalation exposure study of respiratory toxicity induced by 20 nm anatase titanium dioxide nanoparticles

2014 ◽  
Vol 3 (5) ◽  
pp. 367 ◽  
Author(s):  
Jilei Yin ◽  
Cheng Kang ◽  
Yufeng Li ◽  
Qinnuan Li ◽  
Xiaoyong Zhang ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Titanium Dioxide Nanoparticles ◽  
Inhalation Exposure ◽  
Exposure Study ◽  
Aerosol Inhalation ◽  
20 Nm ◽  
Respiratory Toxicity

Structural Characteristics of Nanocomposites Fabricated With In-Situ Particle Synthesis Method

2010 ◽  
Author(s):  
Enis Tuncer ◽  
Isidor Sauers ◽  
D. Randy James ◽  
Georgios Polizos ◽  
Alvin R. Ellis ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Titanium Dioxide Nanoparticles ◽  
Structural Characteristics ◽  
National Laboratory ◽  
Synthesis Method ◽  
Electrical Insulation ◽  
Particle Synthesis ◽  
Oak Ridge ◽  
Electrical Insulation Materials

In this article we discuss fabrication of nanocomposites using an in-situ particle synthesis method. The nanocomposites discussed were prepared with solution based chemistry using a particle precursor mixture, which produces the nanoparticles. The nanocomposites presented were synthesized with titanium dioxide nanoparticles. The efforts of Oak Ridge National Laboratory to deliver better electrical insulation materials using nanotechnology are presented.

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