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Pure silver phosphate is an indirect semiconductor which has super photooxidative capabilities under visible light irradiation. Also, it can be used as a photocatalyst due to the rapid recombination of electron–hole pairs. The low structural stability of pure Ag 3 PO 4 is the major factor militating against its use for practical applications. Under visible light irradiation, carbon nanotubes (CNTs) can increase the stability and photocatalytic activity of. This study investigated the photocatalytic activity and stability of the CNT (6, 0)/hybrid by analyzing the geometric, electronic and optical properties with the density functional theory method. Semimetallic single-walled carbon nanotubes (SWCNT)(6, 0) may chemically or physically interact with the surface depending on its relative orientations. As its surface is exposed by SWCNT (6, 0), becomes a direct band gap semiconductor. The small band gap makes the CNT/hybrid absorb …