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Photocatalytic degradation of nano-flake organic–inorganic composite photocatalyst. PDINH/Bi 2 WO 6. [Display omitted] • An organic-inorganic nano-composite photocatalyst PDINH/Bi 2 WO 6 was synthesized by intermolecular hydrogen bond and π-π superposition, which supported Bi 2 WO 6 on PDINH supramolecular support. • The relationship between the morphology of PDINH/Bi 2 WO 6 and catalytic performance was studied. • Under the conditions of hydrothermal synthesis at 140℃ for 24 h, the photocatalyst could degrade more than 98% of low concentration phenol (10 ppm) under visible light, and the activity of the catalyst decreased less than 5%. Organic-inorganic complex photocatalyst is constructed via the hydrothermal method. PDINH monolayers self-assemble into lamellar organic supramolecular carriers under π-π stacking. Under acidic conditions, –OH was introduced into Bi 2 WO 6 crystal, and the hydrothermal reaction system made it interact better with the C O bond on PDINH, forming hydrogen-like bond –CO ··· H, which aggregated on the exterior of PDINH by van der Waals force. The matched energy band situations of the two nanomaterials and the close integrated interfaces promoted the constitution of a nano lamellar structure, which enhanced the charge carrier separation efficiency. The catalyst with a molar ratio of 0.5:0.4 (PDINH: Bi 2 WO 6) was synthesized at 140℃ for 24 h and had excellent photocatalytic activity. The photocatalytic performance of P/T/B under visible light was evaluated by using 6 ppm aqueous phenol solution as a degradation target. The degradation rate of phenol in aqueous solution was 98% in 350 min. The photocatalytic performance for the degradation of phenol by PDINH/Bi 2 WO 6 was increased twice when compared with PDINH, and four times higher than that of pure Bi 2 WO 6. Furthermore, the stability of Bi 2 WO 6 was reinforced considering the presence of PDINH supramolecular as a carrier, which further improved the recycling and utilization of photocatalyst. [ABSTRACT FROM AUTHOR]