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A comparative study on the photodegradation efficiency of TiO 2 -CS hybrid beads under wet and dry conditions

机译：A comparative study on the photodegradation efficiency of TiO 2 -CS hybrid beads under wet and dry conditions

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摘要

The direct ex-situ technique successfully produced chitosan (CS) support TiO_(2)hybrid beads under wet and dry circumstances. The addition of CS to TiO_(2)photocatalysis improves adsorption, dispersion, and stability. The active surface, crystallinity, and morphology of the hybrid beads were determined, confirming the samples' homogenous granular morphology and homogeneous dispersion of TiO_(2)nanoparticles in the CS matrix. The more vital interaction between TiO_(2)and CS molecules was responsible for the lower IR peak intensities of the OH and NH_(2)groups of wet hybrid beads. Raman spectroscopy and field emission scanning electron microscopy revealed that the crystallinity and phase of TiO_(2)in both wet and dry samples are almost indistinguishable. With the optimal catalyst loading of 6 g, the photodegradation study revealed that wet hybrid beads reported adsorption of 95% for MB, while dry hybrid beads reported 75% for MO. Therefore, to enhance interactions between TiO_(2)and CS, TiO_(2)-CS wet hybrid beads have superior stability, surface functioning, and adsorption capabilities, as determined by characterisation results.

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