Preparation and characterization of TiO2-based composite nanoparticlescontaining poly(N，N-diethylamino ethyl methacrylate) brushes and noble metal M(0)
YANG Xi, LIU Shou-xin*, XU Chao, QI Xiao-jun, DANG Li, LV Hai-yan, WEI Cong-cong
(Key Laboratory of Applied Surface and Colloid Chemistry， Ministry of Education， College of Chemistry and Chemical Engineering，Shaanxi Normal University，Xi′an 710062, Shaanxi, China)
Abstract:
A new kind of TiO2-based ternary composite nanoparticles containing poly(N, N-diethylamino ethyl methacrylate) (PDEAEMA) and noble metal nanoparticles (Pd, Pt, Au) was prepared. PDEAEMA brushes was grafted from dopamine-based initiator anchored on TiO2 nanoparticles via surface-initiated atom transfer radical polymerization (SI-ATRP) at ambient conditions. The PDEAEMA brushes reacted with CH3I to form quaternized-PDEAEMA (Q-PDEAEMA) for exchange with metal anions(such as PdCl2-4，AuCl-4 or PtCl2-6). After that, the resultant was reducted by NaBH4 to form the noble metal nanoparticles on the surface. Fianlly，the ternary nanocomposites (TiO2 nanoparticles-Q-PDEAEMA /noble metal) were obtained. The results indicated that the size of the noble metal nanoparticles in nanocomposite is about 2-10 nm, uniformly distributed among polymer brushes. The obtained composite nanomaterials were characterized by FT-IR, TEM and EDS.
KeyWords:
TiO2 nanoparticles; poly(N，N-diethylamino ethyl methacrylate) (PDEAEMA); noble metal; surface-initiated atom transfer radical polymerization (SI-ATRP); composite nanoparticles
