Synthesis and Evaluation of Amorphous Calcium Phosphate (ACP) by Various Synthesis Methods

2006 ◽  
Vol 309-311 ◽  
pp. 175-178 ◽  
Author(s):  
Mitsuhiko Ohta ◽  
Tetsuo Honma ◽  
M. Umesaki ◽  
Atsushi Nakahira
Keyword(s):  
Calcium Phosphate ◽  
Amorphous Calcium Phosphate ◽  
Sol Gel ◽  
Heat Treatments ◽  
Synthesis Methods ◽  
Gel Method ◽  
Sol Gel Method ◽  
N2 Atmosphere

Amorphous calcium phosphate (ACP) was prepared by a sol-gel method from Ca alkoxide synthesized with Ca metal and ethanol in N2 atmosphere. As-prepared products by sol-gel method were spherical ACP particles of approximately 3 to 10 nm in diameter before heat-treatments. The results from Ca-K edge of as-synthesized ACP showed only one peak around 0.2 nm, suggesting the presence of the first neighbor of Ca in Ca-PO4 cluster.

Cobalt-Doped Silica Organic-Inorganic Materials by Sol-Gel Method: Preparation and Thermal Stability Calcined under N2 Atmosphere

2021 ◽  
Vol 219 (1) ◽  
pp. 247-259
Author(s):  
Jing Yang ◽  
Yuzhi Ai ◽  
Wangqing Fan ◽  
Ruihua Mu ◽  
Xi Chen ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Sol Gel ◽  
Inorganic Materials ◽  
Gel Method ◽  
Sol Gel Method ◽  
N2 Atmosphere

scholarly journals Preparation and Photocatalytic Performance of ZnO/Sepiolite Composite Materials

2021 ◽  
Vol 2021 ◽  
pp. 1-17
Author(s):  
Chao Li ◽  
Huijuan Li ◽  
Guicheng He ◽  
Zhiwu Lei ◽  
Wenyuan Wu
Keyword(s):  
Composite Materials ◽  
Photocatalytic Performance ◽  
Sol Gel ◽  
Environmental Pollutants ◽  
Chemical Properties ◽  
Treatment Method ◽  
Blue Dye ◽  
Synthesis Methods ◽  
Gel Method ◽  
Sol Gel Method

Photocatalytic technology is a widely used water treatment method, whose efficiency can be increased by developing a suitable photocatalyst fabrication procedure. In this study, five different synthesis methods were utilised for the preparation of novel ZnO/sepiolite photolytic composites, namely, sol-gel method, hydrothermal reduction, hydrolytic precipitation, powder sintering, and impregnation-reduction. The obtained photocatalysts were characterised by scanning electron microscopy, infrared spectroscopy, and X-ray diffraction. The differences between the applied photocatalyst preparation methods and the reasons for these differences were discussed, and the photocatalytic activities of the prepared composite materials were compared. The obtained results revealed that the physical structure, chemical properties, and photocatalytic performance of the composite produced by the sol-gel method were superior to those of the materials fabricated by the other four methods. Moreover, this material also exhibited high photocatalytic stability, while its photocatalytic degradation of methylene blue dye proceeded via a quasi-first-order reaction. The prepared composites have broad application prospects in photocatalysis and can be potentially used for treating environmental pollutants.

Study on Different Synthesis Methods of Spherical YAG:Ce3+ Phosphor and its Luminescence Properties

2015 ◽  
Vol 1088 ◽  
pp. 371-376 ◽  
Author(s):  
Xia Zhang ◽  
Cui Xia Yan ◽  
Rong Feng Guan
Keyword(s):  
Sol Gel ◽  
Spherical Particles ◽  
Luminescence Properties ◽  
Precipitation Method ◽  
Thermal Method ◽  
Synthesis Methods ◽  
Processing Parameter ◽  
Gel Method ◽  
Sol Gel Method ◽  
Co Precipitation

Spherical YAG:Ce3+phosphors were synthesized by three different routes namely sol-gel method, co-precipitation method and solvethermal method. The microstructure, crystallization and luminescent properties of the phosphors were studied in order to find the best processing parameter for spherical shape and good luminescence properties of YAG:Ce3+phosphor. Adding citric acid to the precursor solution resulted in the formation of spherical particles in sol-gel method. YAG:Ce3+phosphor made by co-precipitation method was separated with PEG2000, and its spherical particles of size was around 500nm. The hydro-thermal method could get perfect spherical appearance, but it needed heat treatment improve the luminescence property.

scholarly journals Growth and Spectral Investigation on Pure Calcium Phosphate Doped With (Copper and Magnesium) Crystals

2021 ◽  
pp. 322-332
Author(s):  
R. Selvaraju ◽  
M. Bhuvaneswari
Keyword(s):  
Calcium Phosphate ◽  
Sol Gel ◽  
Gallbladder Stone ◽  
Calcium Stones ◽  
Gel Method ◽  
Sol Gel Method ◽  
Gallbladder Stones ◽  
Dta Analysis ◽  
Ft Ir

Calcium stones are most commonly occurring form of cholelithiasis or gallbladder stones most one of the oldest and common afflictions of humans. Calcium phosphate is dissolved minerals in causes of renal to gallbladder stone in both human and animals. Of course, the calcium phosphate is one of the components of gallbladder. Calcium phosphate doped with (Cu and Mg) are crystals are grown by sol-gel method. In the present work the growth and characterization of pure and doped with (Cu and Mg) crystals. The grown crystals were characterization by FT-IR, SEM-EDX and TG/DTA analysis.

scholarly journals INFLUENCE OF AGING TIME IN OBTAINING BIPHASIC CALCIUM PHOSPHATE (BCP) CERAMICS BY SOL-GEL METHOD

2019 ◽  
pp. 196-205
Author(s):  
Lezli Matto ◽  
Lilian Paiva ◽  
Alexandre Antunes Ribeiro ◽  
Marize Varella ◽  
Magna M. Monteiro
Keyword(s):  
Calcium Phosphate ◽  
Aging Time ◽  
Biphasic Calcium Phosphate ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method

scholarly journals Recent Advances in TiO2 Films Prepared by Sol-gel Methods for Photocatalytic Degradation of Organic Pollutants and Antibacterial Activities

Coatings ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 613 ◽  
Author(s):  
Pant ◽  
Park ◽  
Park
Keyword(s):  
Dye Degradation ◽  
Sol Gel ◽  
Antibacterial Activities ◽  
Future Perspective ◽  
Synthesis Methods ◽  
Synthetic Dyes ◽  
Tio2 Films ◽  
Gel Method ◽  
Sol Gel Method ◽  
Recent Advances

Photocatalysis has recently emerged as an advanced, green, and eco-friendly process for the treatment of wastewater and air, and antimicrobial disinfection applications. In this context, TiO2 nanostructures have been shown to be the prominent photocatalyst candidates due to their low cost, non-toxicity, and ease of fabrication. This review highlights the investigation and development of TiO2 photocatalyst film by sol-gel method with special emphasis on the photodecolorization of synthetic dyes and antibacterial activities. Furthermore, various synthesis methods for the preparation of TiO2 films and their advantages, as well as limitations, are summarized. Finally, recent advances in TiO2 films by sol-gel method for dye degradation and antibacterial activities, challenges, and future perspective are discussed.

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