Formation of Short In2O3 Nanorod Arrays Within Mesoporous Silica

• DOI: 10.1021/jp710032w
• Publication Date: 2008-01-26T11:00:43Z
• Authors: Shih-Chieh Chang; Michael H. Huang
• Keywords: Nanorod

We report the formation of arrays short In2O3 nanorods inside nanoscale channels mesoporous silica SBA-15. In(NO3)3 dissolved in methanol was incorporated into SBA-15 powder, followed by heat treatment under a nitrogen flow at 700 °C for 4 h to generate densely aligned nanorods. The have been characterized XRD patterns, TEM images, adsorption−desorption isotherm measurements, and optical spectroscopy. They possess cubic crystal structure. free-standing obtained after framework removal with 2.0 M NaOH solution showed diameters 6−7 nm lengths largely less than 50 nm. Some can be as 10 length. exhibit an absorption band ∼300 observation this quantum-confined effect is likely induced small nanorod diameter. A fluorescence peak centered 387 recorded. No other oxygen-vacancy-related emission signals blue green light region were present, suggesting high crystalline quality synthesized.