Functional cellulose-based nanofibers with catalytic activity: effect of Ag content and Ag phase.
The cellulose acetate nanofibers containing Ag ions [CA(as-spun)] were fabricated by electrospinning a CA solution with 0-5wt% AgNO3. The CA(as-spun) was UV-irradiated to produce CA nanofibers containing Ag ions/nanopaticles (NPs) [CA(UV)], and the CA(UV) was deacetylated to cellulose nanofibers with Ag NPs [CA(UV+DA)]. When the CA(UV) was deacetylated with KOH/ethanol solution, the number and size of the Ag NPs were further increased. During the deacetylation reaction, residual Ag(+) ions in the CA(UV) seemed to be reduced by hydroxide anions in KOH/ethanol solution and Ag NPs seemed to be diffused and aggregated further in the cellulose nanofibers. The catalytic activity of cellulose-based nanofibers with different Ag contents or phases was investigated using a reduction of methylene blue (MB) as a model reaction. From a model reaction, Ag ions played an important role as a reducing catalyst of MB.
Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University, Daejeon 305-764, South Korea.
Ki Hyuk
KH
Jang
Department of Nanotechnology, Chungnam National University, Daejeon 305-764, South Korea.
Yun Ok
YO
Kang
Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University, Daejeon 305-764, South Korea. Electronic address: parkwh@cnu.ac.kr.
Won Ho
WH
Park
D002384:Catalysis; D002482:Cellulose / Q000031:analogs & derivatives* / Q000737:chemistry; D004058:Diffusion; D053768:Metal Nanoparticles / Q000737:chemistry; D057139:Nanofibers / Q000737:chemistry*; D010316:Particle Size; D012834:Silver / Q000737:chemistry*; D014466:Ultraviolet Rays
C005062:acetylcellulose; D012834:Silver; D002482:Cellulose
Catalytic activity; Cellulose nanofibers; Silver nanoparticles