Fig. 8From: Facile synthesis, characterization and enhanced catalytic reduction of 4-nitrophenol using NaBH4 by undoped and Sm3+, Gd3+, Hf3+ doped La2O3 nanoparticlesLinear plots of ln(A0/At) vs. time for catalytic reduction of 4-nitrophenol over the synthesized undoped and doped La2O3 NPsBack to article page