Nowadays, efforts to develop novel light harvesters with high activity, stability and economy of precious metals it is fundamental in the field of photocatalysis. In this regard, coupling a low bad gap of p-type CuO with a high reactive n-type HLaTa₂O₇ protonated layered perovkite, is expected to produce enhanced charge carrier lifetime with beneficial impact on the photocatalytic activity. Therefore, a novel lamellar architecture was fabricated, via successive intercalation of n-butylamine followed by slowly introduction of smaller Cu²⁺ cations using HLaTa₂O₇ as host matrix to yield Cu²⁺/CuxLaTa₂O₇ layered compound. According to XRD data, the peak corresponding to (001) diffraction line of HLaTa₂O₇ host material was changed depending on the guest molecule in the interlayer (i.e. n-butylamine, copper). H₂-TPR results of the fabricated Cu-based perovskite indicated the co-existence of both Cu²⁺ reduced in two steps on HLaTa₂O₇ surface and [Cu²⁺(amine)^-]⁺ between host interlayers. A correlation between H₂-TPR experiments and EDX analysis shows that 26 % Cu²⁺ was incorporated in between interlayer galleries of HLaTa₂O₇. The beneficial role of copper addition demonstrates increasing of the specific surface area up to 4.1 m²/g compared to unmodified host compound. The photocatalytic degradation of phenol under simulated solar light irradiation has been used to assess the activity of modified layered perovskites. Our finding strongly support Cu-based layered perovskite as a promising candidate for depollution reactions.