Thermal decomposition of hydrotalcite with molybdate and vanadate anions in the interlayer

Thermogravimetric analysis and hot-stage Raman spectroscopy of cubic indium hydroxide

“…Therefore the aim of this research is to demonstrate the use of thermal analysis and hot stage Raman spectroscopy to assess the thermal stability of indium hydroxide, and to determine the changes in the molecular structure of the material as the indium hydroxide is thermally treated. Such research compliments the thermal analysis and differential thermogravimetric analysis of materials [22][23][24][25][26][27][28][29][30][31][32][33][34][35][36]. It is reported that many factors, such as disorder, size and shape distribution, can all influence the thermoanalytical properties and vibrational properties.…”

Hydrodesulfurization of 4,6-DMDBT on a multi-metallic sulfide catalyst with layered structure

“…Accordingly, the DSC signal of Ni 3 AlMoW-5 catalyst (Fig. 2(b)) also shows two main peaks besides the peak at 100 • C due to removal of water: one at about 350 • C corresponds to the decomposition of the Mo and W salts, dehydroxylation of the LDH hosts, and destruction of the NO 3 − anions in the layers; the other one at about 650 • C corresponds to the loss of oxygen by decomposition of the oxides, which is much lower than that reported in the literature, [35] indicating that our sample can easily lose its oxygen and exhibits higher activity. We supposed that the Mo and W species form a composite compound in the interlayer galleries as well as on the surface of the LDH.…”

Green Cycle: Sulfate Sorption from Natural Water on Anionic Clay Compound Obtained from Industry Wastewater

“…To achieve complete precipitation of the metal ions, solution of Na 2 CO 3 (20 wt%) was added a until the pH reached 10. Again, though not used here, other solutions such as NaHCO 3 , K 2 CO 3 , KHCO 3 , Ca(HCO 3 ) 2 , MgCO 3 and Mg(HCO 3 ) 2 in pure form or as aqueous solutions with a solid content within a range of 10 to 25 wt% can be used to form the precipitate. The mixture was kept at 60˚C for one hour while continuing high-shear agitation, then cooled to room temperature and then filtered through a Buchner funnel.…”

“…From the general formula for HT, M(II) 1-x M(III) x (OH) 2 (A n− ) x/n mH 2 O [2][3][4][5], the crystal structure of these LDH ( Figure 1) consists of positively-charged brucitetype main sheets which forms an octahedron as a subunit of a layered structure of HT, where partial replacement of divalent M(II) with trivalent metal ion M(III) in the brucite-type structure results in an excess of positive charge, which is compensated in the HT structure by an n-valent anion (A n− ) and x can have values between 0.2 and 0.33. These anions such as carbonate, sulfate and hydroxide (which may also be hydrated) can be introduced between the layers of the crystal structure.…”