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[Display omitted] • A mixed dimensional catalyst based on FAPbBr 3 and 2D materials are prepared through directly synthesis. • The behavior of FAPbBr 3 in-situ growth on 2D materials are demonstrated. • The products can be controlled by engineering the growth of FAPbBr 3 on 2D materials. Constructing mixed dimensional materials have been regarded as an outstanding approach to maximum the advantages from materials of different dimensions. In this work, we prepared a mixed dimensional photocatalyst based on Formamidinium lead bromide (FAPbBr 3) perovskite and 2D materials (2DMs). The aim of this work is to utilize distributions of the active sites in 2DMs, through growing FAPbBr 3 on the different position of 2DMs, the concentration of photogenerated charges is manipulated, thus conducting different reactions. A pre-treatment using HBr to increase the unsaturated bonds in MoS 2 presents significant influence on the FAPbBr 3 growth and its photocatalytic product. The scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS) confirm that the perovskite nanoparticles were well loaded on the 2D materials. The photocatalytic process and the heterojunction arrangement are demonstrated by X-ray photoelectron spectroscopy (XPS), time-resolved photoluminescence (TRPL), electron paramagnetic resonance (EPR) and surface photovoltage microscopy (SPVM). By adjusting the weight ratios and growth of FAPbBr 3 on the top of 2DMs, the optimized composite photocatalyst (with 30 wt% of FAPbBr 3) exhibits remarkable photoactivity for oxidation of benzyl alcohol into benzaldehyde (30 wt% FAPbBr 3 @WS 2 performed 75.9% conversion in 4 h, approximately 9-fold than the pure 2DMs). Meanwhile, by growing FAPbBr 3 on the edge of 2DMs, benzoic acid is obtained as the product. Although longer reaction time is needed, the photocatalyst performs outstanding activity (30 wt% FAPbBr 3 @MoS 2 reached 84.5% conversion in 5 h). [ABSTRACT FROM AUTHOR]

Highlights: [•] Porous anodic alumina (PAA) were prepared in a two-step anodizing process. [•] Organic–inorganic perovskite embedded on PAA. [•] Confinement effect of the incorporation of perovskite compounds quantum wells into different porous anodic aluminum. [•] New approach to stabilize the organic–inorganic perovskite crystal for optoelectronic devises applications. [Copyright &y& Elsevier]