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Acid treatment, with aqueous solutions of HCl, HNO 3 , H 2 SO 4 , HNO 3 + NaCl and H 2 SO 4 + NaCl, for the amorphous reaction paste resulted from mesoporous anatase particles dispersed in KOH solution at 90 °C has been performed. The alkaline reaction paste transforms into hexatitanate after addition of HCl solution (0.1 M) to a pH value from 6.0...
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