TY - JOUR
T1 - Bi-quantum dots co-sensitized TiO 2 nanocomposites
T2 - Templated synthesis and stabilized by polymer brushes
AU - Wang, Yanbin
AU - Yu, Bo
AU - Gao, Tingting
AU - Wang, Rongmin
AU - Ye, Qian
AU - Zhou, Feng
PY - 2012/6/15
Y1 - 2012/6/15
N2 - In this paper, a new strategy is reported to produce CdS-CdSe nanoparticles co-sensitized TiO 2 nanocomposites via polymer brush template. The anonic functional polymer (polymethacrylate cadmium) are grafted on TiO 2 surface via the surface-initiated atomic transfer radical polymerization using biomimetic anchor. The coordinated cadmium as the source precursor reacts with H 2S to generate CdS nanocrystals on TiO 2 surface. Interestingly, after reaction, the polymer brush can acts as the nanoreactor for generating and shaping CdSe nanoparticles via the absorption of cadmium ions by carboxylate groups and subsequent reaction with Na 2SeSO 3, the high density CdS or CdS-CdSe nanocrystals can be multiply uploaded on TiO 2 surface by repeated steps. CdS nanoparticles have very small size of about 3-5 nm and the size of CdS-CdSe bi-nanocrystals is about 5-10 nm, which are stabilized by tether polymer brush. The light absorption of CdS/TiO 2 and CdS-CdSe/TiO 2 are investigated and both are expanded to visible light region.
AB - In this paper, a new strategy is reported to produce CdS-CdSe nanoparticles co-sensitized TiO 2 nanocomposites via polymer brush template. The anonic functional polymer (polymethacrylate cadmium) are grafted on TiO 2 surface via the surface-initiated atomic transfer radical polymerization using biomimetic anchor. The coordinated cadmium as the source precursor reacts with H 2S to generate CdS nanocrystals on TiO 2 surface. Interestingly, after reaction, the polymer brush can acts as the nanoreactor for generating and shaping CdSe nanoparticles via the absorption of cadmium ions by carboxylate groups and subsequent reaction with Na 2SeSO 3, the high density CdS or CdS-CdSe nanocrystals can be multiply uploaded on TiO 2 surface by repeated steps. CdS nanoparticles have very small size of about 3-5 nm and the size of CdS-CdSe bi-nanocrystals is about 5-10 nm, which are stabilized by tether polymer brush. The light absorption of CdS/TiO 2 and CdS-CdSe/TiO 2 are investigated and both are expanded to visible light region.
KW - CdS-CdSe nanocrystal
KW - Co-sensitization
KW - Polymer brush
KW - Titanium oxide
UR - http://www.scopus.com/inward/record.url?scp=84861527835&partnerID=8YFLogxK
U2 - 10.1016/j.matchemphys.2012.03.099
DO - 10.1016/j.matchemphys.2012.03.099
M3 - 文章
AN - SCOPUS:84861527835
SN - 0254-0584
VL - 134
SP - 966
EP - 972
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
IS - 2-3
ER -