Enhanced photoluminescence property of SnO2 nanoparticles contained in mesoporous silica synthesized with leached talc as Si source
✍ Scribed by Huaming Yang; Chunfang Du; Shengming Jin; Aidong Tang; Guangshe Li
- Book ID
- 104055506
- Publisher
- Elsevier Science
- Year
- 2007
- Tongue
- English
- Weight
- 664 KB
- Volume
- 102
- Category
- Article
- ISSN
- 1387-1811
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✦ Synopsis
Leached talc was used as Si source to synthesize MCM-41 mesoporous silica with huge surface area (1102 m 2 /g) and uniform pore size distribution (2.8 nm). Then the synthesized MCM-41 was applied as the host for size-confined tin oxide (SnO 2 ) to produce SnO 2 /MCM-41 composites. Tin was introduced into the pores of MCM-41 matrix by sol-gel method with SnCl 4 AE 5 H 2 O as Sn source and citric acid controlling the hydrolysis rate. X-ray diffraction (XRD), high-resolution TEM (HRTEM) and N 2 adsorption-desorption measurements confirmed the incorporation of SnO 2 nanoparticles inside the pores of the mesoporous host without destroying its integrity. No bulk SnO 2 nanoparticles were observed on outer surface of the mesoporous matrix. Furthermore, decrease of pore volume, average pore diameter and BET surface area, and increase of wall thickness proved the existence of SnO 2 nanoparticles within the channels of host. The SnO 2 /MCM-41 composites showed enhanced room-temperature photoluminescence (PL) property with about 8 times of pure SnO 2 nanoparticles.