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Study of Encapsulation of DBS-Arsenazo, Cadmium Sulfide in Nanoscale SBA-15

Author: HuShun
Tutor: DiQingZhou；YuHui
School: Changchun University of Science and Technology
Course: Condensed Matter Physics
Keywords: Nano- SBA-15 molecular sieve Dibromo acid arsenazo CdS Liquid transplantation Ion exchange - Hydrothermal Main - Guest Nanocomposite Materials Luminescent materials
CLC: O561
Type: Master's thesis
Year: 2011
Downloads: 5
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Abstract


Mesoporous molecular sieves and sieve body - nanoguest composites has attracted great interest and concern. SBA-15 as compared with other molecular sieves , SBA-15 pore walls thicker , larger aperture , hydrothermal stability and better thermal stability . In this paper three block copolymer (EG20PG40EG20) as a template, TEOS as silicon source , in acidic medium prepared nano- SBA-15 molecular sieve . Transplantation , respectively, and by liquid ion exchange a hydrothermal method will dibromo acid arsenazo (DBS-ASA) and CdS guest materials were assembled into the zeolite host material , obtained master - guest nanocomposite materials (SBA-15) - (DBS-ASA) and (SBA-15)-CdS. Fourier transform infrared spectroscopy showed that the prepared main - the main guest nanocomposite material zeolite framework intact ; powder XRD test results show that the assembly process, the zeolite framework is not damaged, and the prepared master - guest nanocomposite material zeolite crystallinity remains high ; N2 adsorption - desorption results show that the assembled host - guest nanocomposite material has a specific surface area and pore volume than the main body of unassembled zeolite decreased , indicating that the object has been partly occupied the zeolite channels . Scanning electron microscopy studies show that dibromo acid ARSENAZO and CdS respectively in the zeolite pore ; luminescence spectra showed the assembled host - guest nanocomposite materials (SBA-15) - (DBS-ASA) and (SBA- 15)-CdS at 470 nm and 541nm at having luminescent properties , in applications such as light-emitting materials have potential applications .

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CLC: > Mathematical sciences and chemical > Physics > Molecular physics, atomic physics > Molecular Physics
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