Preparation of silver-titanium dioxide core-shell (Ag@TiO2) nanoparticles: Effect of Ti-Ag mole ratio

Conference proceedings article

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Angkaew S., Limsuwan P.

ผู้เผยแพร่: Elsevier

ปีที่เผยแพร่ (ค.ศ.): 2012

Volume number: 32

หน้าแรก: 649

หน้าสุดท้าย: 655

จำนวนหน้า: 7

นอก: 1877-7058

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84870507682&doi=10.1016%2fj.proeng.2012.01.1322&partnerID=40&md5=5bae58e19d2b29aae6745ae8c4212904

ภาษา: English-Great Britain (EN-GB)

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บทคัดย่อ

Silver-titanium dioxide core-shell (Ag@TiO2) nanoparticles were prepared via a reduction reaction of silver nitrate followed by a sol-gel process of titanium tetraisopropoxide (TTIP). The silver core was prepared from 10 ml of 5- mM silver nitrate solution with hydrazine as a reducing agent, and cetyltrimethylammonium bromide as a stabilizing agent. The resulting solution was treated with 1 ml of TTIP solution in ethanol with concentration between 1, 2, 3, 4 and 5 mM (mole ratios of Ti:Ag were 2, 4, 6, 8, and 10 %, respectively). Morphology of the resulting materials was investigated by transmission electron microscope (TEM). The TEM results showed that the core-shell (Ag@TiO 2) structure was found only in solutions with low Ti:Ag mole ratio (2-6 %) while the composite morphology with Ag particles randomly embedded in TiO2 matrix was found with higher Ti:Ag mole-ratio. The Ag@TiO 2 particles contain silver core (diameter of 10-15 nm) surrounded by the TiO2 shell with the shell thickness of 10-20 nm in the solution with 2% mole-ratio and 20-50 nm in that with 6% mole-ratio. Optical spectrometric measurements found that the surface plasmon resonance (SPR) peak of silver nanoparticles was red-shifted from about 410 nm (in solution of silver nanoparticles) to about 425-430 nm (in the solutions of Ag/TiO2 nanoparticles) and it was not significantly affected by the content of TiO 2. ฉ 2010 Published by Elsevier Ltd.

คำสำคัญ

Core shell, silver, Silver/Titanium dioxide, titanium dioxide