Title of article
Sonochemical synthesis, photocatalytic activity and optical properties of silica coated ZnO nanoparticles
Author/Authors
Siddiquey، نويسنده , , Iqbal Ahmed and Furusawa، نويسنده , , Takeshi and Sato، نويسنده , , Masahide and Bahadur، نويسنده , , Newaz Mohammed and Mahbubul Alam، نويسنده , , Md. and Suzuki، نويسنده , , Noboru، نويسنده ,
Pages
6
From page
750
To page
755
Abstract
In this paper, we report the synthesis of silica coated ZnO nanoparticles by ultrasound irradiation of a mixture of dispersion of ZnO, tetraethoxysilane (TEOS), and ammonia in an ethanol–water solution medium. The silica coating layer formed at the initial TEOS/ZnO loading of 0.8 for 60 min ultrasonic irradiation was uniform and extended up to 3 nm from the ZnO surface as revealed from HR-TEM images. Silica coated ZnO nanoparticles demonstrated a significant inhibition of photocatalytic activity against photodegradation of methylene blue dye in aqueous solution. The effects of silica coating on the UV blocking property of ZnO nanoparticles were also studied.
Keywords
Sol–gel method , ZNO , photocatalytic activity , Silica coating , Sonochemical synthesis , UV shielding
Journal title
Astroparticle Physics
Record number
2007370
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