Low Temperature Route to Nanocrystalline CuO Powder

被引：7

作者：

Bedi, R. K. ^{[1
]}

Singh, Iqbal ^{[2
]}

机构：

[1] Guru Nanak Dev Univ, Dept Phys, Mat Sci Lab, Amritsar 143005, Punjab, India

[2] Khalsa Coll, PG Dept Phys, Amritsar 143005, Punjab, India

来源：

CURRENT NANOSCIENCE | 2009年 / 5卷 / 03期

关键词：

Nanoparticle; auto combustion; X-ray technique; kinetics; LARGE-SCALE SYNTHESIS; COPPER-OXIDE; SPRAY-PYROLYSIS; CU2O;

D O I：

10.2174/157341309788921525

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

Nanocrystalline CuO with particle size of about 24 nm was directly synthesized by sol-gel auto combustion method using citric acid as a reducing agent/fuel and nitrate as oxidizing agent at low temperature of 200 degrees C. Thermal decomposition of the nitrate-citrate xerogel was investigated by thermogravimetric/differential thermal analysis (TG/DTA) technique in the temperature range 30-500 degrees C. The yielding product calcined at 400 degrees C was characterized for CuO by X-ray diffraction, Field enhanced scanning electron microscope (FE-SEM) and UV-vis absorption spectroscopy. The morphological properties of the prepared oxide after the combustion synthesis reveal that the particles are bound together into agglomerates of different shapes and sizes. The band gap is estimated to be 2.05 eV according to the results of the optical measurements. A possible mechanism for the formation of CuO has also been discussed.

引用

页码：273 / 277

页数：5

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