Purple nanometrics pigments based on cobalt-doped manganese molybdate: Synthesis, characterization, structural, thermal, optical, colorimetric and chemical properties

This work is related to the characterization of nanometrics materials ?MnMoO4-?CoMoO4 system, prepared by co-precipitation and sol-gel routes from corresponding metal salts. The structural, morphological colorimetric characteristics obtained powders were studied using thermogravimetric differential thermal analysis (TGA-DTA), X-ray diffraction (XRD), infrared Raman spectroscopy, scanning electron microscopy (SEM) colorimetry (CIE-L*a*b* system). surface specific area was calculated Brunauer–Emmett–Teller (BET) in adsorption/desorption isotherm. patterns highlighted formation a continuous solid solution Mn1-xCoxMoO4 (0 ? x 1) monoclinic symmetry (C2/m) isotype ?-MnMoO4 this regardless synthetic route adopted. FTIR spectroscopy showed that chemical bonds’ nature compounds corresponded strong Mo–O–Mo, Mo–O Co–O–Mo vibrational modes. micrographs form nanorods with sizes ranging 10 200 nm for compositions = 0.3 0.6, co-precipitation. measurements indicated process present lower values than those co-precipitation, cobalt substitution rate. purple nanoscale powder (x 0.6) about 7.52 m2/g. Colorimetric parameters heat treated at 1100 °C degree component (-b*) significant synthesis method