Viscose rayon cellulose fiber was selectively oxidized so that carboxylate functional group was introduced on the fiber. Enough dispersed platinum nanoparticles and silver nanoparticles having average sizes of around 5 nm with small size distribution were prepared with capping of amine-terminated fourth generation poly(amido amine) dendrimer and they were immobilized on oxidized fibers through amidation between terminal amine groups of dendrimer and carboxylic acids on oxidized fibers. The fiber containing dendrimer (1 wt%) and platinum (2 wt%) exhibited the 84 times higher adsorption capacity for formaldehyde gas on dendrimer site than on fiber site and the catalytic efficiency (65%) towards decomposition of formaldehyde gas adsorbed on the dendrimer site, and the silver (0.2 wt%)-loaded fiber revealed excellent biocidal activity against E. coli. Thus, it can be noted that the immobilization of functional metal nanoparticles protected by dendrimer on cellulose fibers is effective to produce efficient textile products with smart functions like the degradation of causative agents for sick building syndromes. (C) 2016 Elsevier B.V. All rights reserved.