Dual-sensitized modification engineering with enhanced photocatalytic degradation for organic dye

Organic pollutant is an environmentally harmful and ubiquitous aquatic with extensive production application. In this study, a unique novel TiO2-based dual-sensitized heterojunction photocatalyst (PbS/CdS/TiO2) was successfully obtained by one step hydrothermal method, chemical bath deposition (CBD) method ionic layer adsorption reaction (SILAR) method. Scanning electron microscopy, X-ray photoelectron spectroscopy, transmission microscopy energy dispersive spectrometer characterized the composition. PbS/CdS decorated on surface of TiO2 nanosheet array. As stable catalyst wide-spectrum (300–800 nm) optical response, excited electron–hole pairs PbS/CdS/TiO2 could apply in degrading organic pollutants. Successfully, degradation efficiency PbS(5 C)/CdS(30 min)/TiO2 nanocomposites reached 99.9% under visible light, which 5 times over pure TiO2. This ternary heterostructured materials will be well-promising photocatalysts.