Gold Nanoparticle-Decorated Bi2S3 Nanorods and Nanoflowers for Photocatalytic Wastewater Treatment

Colloidal synthesis of photocatalysts with potential to overcome the drawback low photocatalytic efficiency brought by charge recombination and narrow photo-response has been a challenge. Herein, general facile colloidal approach synthesize orthorhombic phase Bi2S3 particles rod flower-like morphology is reported. We elucidate formation growth process mechanisms these synthesized nanocrystals in detail cooperate metallic gold nanoparticles (AuNPs) construct heterostructured photocatalysts. The unique properties AuNPs featuring tunable surface plasmon resonance large field enhancement are used sensitize activity semiconductor particles. morphology, structure, elemental composition, light absorption ability prepared catalysts characterized (high-resolution) transmission electron microscopy, scanning X-ray diffraction spectroscopy, photoelectron UV–vis spectroscopy. exhibit high stable for degradation organic pollutants demonstrated using rhodamine B methyl orange dyes under solar irradiation. show that incorporation increases 1.2 3-fold. Radical trapping analysis indicates production hydroxyl superoxide radicals dominant active species responsible photodegradation activity. good stability recyclability.