A hierarchical CuS/Bi2W2O9 heterojunction photocatalyst exhibits excellent photocatalytic activity for the degradation of diuron achieving 95% mineralization within 3 h of irradiation.

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A series of new type-II CdS/Bi 2 W 2 O 9 heterojunction nanomaterials is prepared by a two stage process. Initially, phase-pure Bi 2 W 2 O 9 , with orthorhombic crystalline structure, is prepared by a facile combustion-synthesis route. The combustion-synthesized Bi 2 W 2 O 9 is subsequently modified by CdS nanoparticles using a hydrothermal route. The CdS/Bi 2 W 2 O 9 heterojunctions are characterized using XRD, XPS, FTIR spectroscopy, UV/Vis DRS, PL, and FESEM and HRTEM studies. The occurrence of ultrafine CdS nanoparticles, with diameters of 8-15 nm, well-dispersed over BWO plates, is inferred from [a]

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