Fig. 6From: Functional Application of Noble Metal Nanoparticles In Situ Synthesized on Ramie FibersEvolution of UV-vis absorption spectra of 4-nitrophenol solution with a untreated ramie fibers, b Ag-90-10-1, and c Ag-90-10-3 after NaBH4 solution was added. d Plots of corresponding band intensity at 400 nm as a function of reaction timeBack to article page