Stable photoluminescence of zinc oxide quantum dots in silica nanoparticles matrix prepared by the combined sol–gel and spray drying method

2001 ◽  
Vol 89 (11) ◽  
pp. 6431-6434 ◽  
Author(s):  
Mikrajuddin ◽  
F. Iskandar ◽  
K. Okuyama ◽  
F. G. Shi
Keyword(s):  
Quantum Dots ◽  
Zinc Oxide ◽  
Silica Nanoparticles ◽  
Spray Drying ◽  
Sol Gel ◽  
Drying Method

scholarly journals The Effects of Zinc Oxide (ZnO) Quantum Dots (QDs) Embedment on the Physicochemical Properties and Photocatalytic Activity of Titanium Dioxide (TiO2) Nanoparticles

2021 ◽  
Vol 32 (2) ◽  
pp. 71-85
Author(s):  
Anwar Iqbal ◽  
Usman Saidu ◽  
Farook Adam ◽  
Srimala Sreekantan ◽  
Normawati Jasni ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Zinc Oxide ◽  
Titanium Dioxide ◽  
Physicochemical Properties ◽  
Quantum Confinement Effect ◽  
Sol Gel ◽  
Average Crystallite Size ◽  
Fluorescent Light ◽  
Zno Quantum Dots ◽  
Zno Qds

In this study, a detailed investigation on the effect of zinc oxide (ZnO) quantum dots (QDs) embedment on the physicochemical properties of anatase titanium dioxide (TiO2) was conducted. The highly porous nanocomposite labelled as ZQT was prepared via the sol-gel assisted hydrothermal method. The powder X-ray diffraction (XRD) analysis indicates that the average crystallite size of the ZnO QDs, anatase TiO2 (TiO2 NPs) and ZQT were 4.45 nm, 9.22 nm and 11.38 nm, respectively. Photoluminescent (PL) analysis detected the presence of defects related to TiO2, oxygen vacancies and quantum confinement effect (QCE) of the ZnO QDs in ZQT. These features enhanced the photodegradation of tetracycline (TC) under 48 watt of fluorescent light irradiation when ZQT (98.0%) was used compared to TiO2NPs (32.4%) and ZnO QDs (68.8%). The photodegradation activity was driven by O2●− followed by ●OH and h+.

Preparation of zinc oxide/silica nanocomposite particles via consecutive sol–gel and flame-assisted spray-drying methods

2014 ◽  
Vol 254 ◽  
pp. 252-258 ◽  
Author(s):  
W. Widiyastuti ◽  
Iva Maula ◽  
Tantular Nurtono ◽  
Fadlilatul Taufany ◽  
Siti Machmudah ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Spray Drying ◽  
Sol Gel ◽  
Drying Methods ◽  
Nanocomposite Particles ◽  
Silica Nanocomposite

scholarly journals Preparation and in Vitro Bioactivity of Micron-sized Bioactive Glass Particles Using Spray Drying Method

2018 ◽  
Vol 9 (1) ◽  
pp. 19 ◽  
Author(s):  
Yu-Jen Chou ◽  
Chih-Wei Hsiao ◽  
Nien-Ti Tsou ◽  
Meng-Huang Wu ◽  
Shao-Ju Shih
Keyword(s):  
Spray Drying ◽  
Glass Melting ◽  
Sol Gel ◽  
Synthetic Methods ◽  
Biological Applications ◽  
Drying Method ◽  
In Vitro Bioactivity ◽  
Bioactive Glasses ◽  
Spray Dried

In recent years, bioactive glasses (BGs) have attracted enormous attention with their superior bioactivity, non-toxicity and degradability. Owing to their properties, they have been applied in various biological applications. In the present work, we demonstrated that micron-sized BGs can be prepared with a spray drying method. This technique offers the advantages of low contamination and the ability of mass production, in contrast to the two major synthetic methods, conventional glass-melting and sol-gel, previously used for preparation of BGs. Characterizations of phase composition, morphology and specific surface area of spray dried BG powders were carried out and bioactivity was examined in vitro with respect to the ability to form a hydroxyapatite layer on the surface of the particles after they were immersed in simulated body fluid.

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