Abstract
La2O3/AgI nanocomposite was prepared using ball-milling, resulting in the transformation of AgI crystal structure and the formation of heterostructure with La2O3. The nanocomposite showed enhanced photocatalytic performance in degrading antibiotics and dehydrogenating organic compounds. The influence of AgI content on the photocatalytic performance was examined, and all composites showed improved catalytic activity compared to individual La2O3 and AgI. The enhanced activity is attributed to smaller particle size, heterostructure formation, build-in electric field, effective charge carrier separation and transfer. Active species trapping experiment and EPR measurement revealed that superoxide radicals and photogenerated holes are the main active species.
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