Increased chemisorption onto activated carbon after ball-milling

Effect of elemental iron on the carbothermic reduction of the anatase and rutile forms of titanium dioxide

“…1 shows the mass loss for anatase and rutile systems both with and without iron. The mass losses up to ∼800 • C in all the systems is related to adsorbed gas, as shown elsewhere [24,25] with XRD showing no evidence for reduction in any system after heating to 800 • C.…”

“…This phenomenon has been observed during heating of milled carbons up to 1200 • C in an inert atmosphere [24,25]. The absence of reduction products is clearly shown by the presence of only anatase and rutile in the XRD traces of the samples heated to 800 • C, just below the initial increase in the rate of mass loss.…”

“…Thus, the lower sorption of gas would seem to be due to the formation of nanostructured iron-carbon phase(s) decreasing the quantity of free carbon in the system. The sorbed gases on carbon are present up to at least 1200 • C [24,25] and there was some evidence that gas remained on the surface beyond this temperature.…”

Carbothermic reduction of anatase and rutile

“…This phenomenon was observed during heating of milled carbons up to 1200 • C in an inert atmosphere [29,30]. The absence of reduction products is clearly shown by the presence of only anatase and rutile in the XRD traces of the samples heated to just below the initial increase in the rate of mass loss.…”

Valorization of coal fly ash by mechano-chemical activationPart I. Enhancing adsorption capacity

“…MA has already found application in several fields, both at laboratory and industrial scales [17][18][19][20][21][22], including environmental protection [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40].…”