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This graphical abstract describes in general the treatment processes of dye-polluted water using the prepared samples. Activated carbon undergoes both adsorption and catalytic oxidation processes, further the photocatalytic efficiency of each catalyst supported by activated carbon enhanced the removal of dye completely in a short time in addition to adsorption process in the early irradiation time.

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ChemInform Abstract are investigated employing DTA and XRD techniques. Li2O doping of CuO-Al2O3 solids containing 16.3 wt.% CuO at 500 rc C, which results in location of Li+ ions in the octahedral and tetrahedral sites of the Al2O3 support, is shown to enhance the crystallization of the CuO phase. At 800 rc C, Li2O doping inhibits the solid-solid interaction between CuO and Al2O3 to give CuAl2O4 due to formation of LiAl5O8 and Li2O-CuO solid solution. CuO stimulates the crystallization of Al2O3 into corundum at temp. > 900 rc C, whereas Li2O doping hinders this crystallization process. Addition of 3.57 wt.% Li2O leads to formation of an amorphous Al2O3 even when fired at 1000 rc C. This effect is very desirable in the field of catalysis (DTA and XRD).