IR SPECTROSCOPY STUDY OF COPPER NANOPARTICLES

摘要

Nanoparticles with composition Cu_xB_yH_z have been synthesized by a borohydride reduction process at a room temperature and under different hydrodynamic conditions of mixing of both water solutions (one of the copper salt solution of CuSO_4.5H_2O, CuCl_2.2H_2O or CuCl_2 and the other of NaBH_4). Three types of reactors have been used: a reactor of ideal mixing (T) working in some cases with an application of d.c. magnetic field during the synthesis, a reactor of full displacement (Y) working continuously or discontinuously and a reactor of ideal displacement ― the so-called "antigravity" (A). Copper nanosized particles have been investigated by Brucker EQINOX 55 Infrared Spectrophotometer with Fourier transformation using KBr matrix. IR spectroscopy study of the copper nanoparticles has been made in the 4000―400 cm~(-1) range. IR spectra have proven the existence of different groups, such as BO_2, BO_3, BO_4, ClBO, BH_3 having chemical bonds with a variable length as well as various absorption's bands at different frequencies.