| Summary: | A novel 2D ultrathin Ag/AgI-δ-Bi<sub>2</sub>O<sub>3</sub> photocatalyst was constructed by a facile hydrothermal and in situ photodeposition method, which presented a uniform nanosheet structure with an average height of 6 nm. Its composition, morphology and light-harvesting properties were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV−vis spectrophotometer (UV−vis) and photoluminescence (PL) measurements in detail. The Ag/AgI-δ-Bi<sub>2</sub>O<sub>3</sub> nanocomposites showed an excellent photocatalytic nitrogen fixation performance of 420 μmol L<sup>−1</sup> g<sup>−1</sup> h<sup>−1</sup> in water without any sacrificial agent. The introduction of Ag/AgI nanoparticles caused the morphology modification of δ-Bi<sub>2</sub>O<sub>3</sub>, a higher concentration of oxygen vacancy, and the construction of a plasmon sensitized heterojunction, resulting in enhanced light absorption, improved separation efficiency of charge carriers and strong N<sub>2</sub> absorption and activation ability, which are responsible for the superior photocatalytic performance of Ag/AgI-δ-Bi<sub>2</sub>O<sub>3</sub>.
|
|---|
