Abstract The ternary nanocomposite of Ag@WO3@rGO was synthesized via a two-step hydrothermal method in which the binary composite of the Ag-doped WO3 (Ag@WO3) prepared by the 1st hydrothermal step was combined with the reduced graphene oxide (rGO) via the ultrasonic-assisted 2nd hydrothermal step. The composition with Ag and rGO helped to reduce the optical bandgap energy of WO3, and thereby to enhance the photocatalytic activity of the WO3–based nanocomposites. When compared with the pristine WO3 sample under the solar simulation irradiation, the binary (Ag@WO3) nanocomposite showed the increased photocatalytic activity towards the degradation of Rhodamine B (RhB) from 23% (pristine WO3) to 80% (Ag@WO3). Notably, the ternary (Ag@WO3@rGO) nanocomposite exhibited an excellent photocatalytic efficiency of RhB degradation (99.5%). The significantly enhanced photocatalytic activity was assigned to the combined synergy effects of the electron-reservoir of Ag and the highly absorptive r-GO with the visible-band gap WO3 semiconductors, which suggests a promising procedure to construct ternary nanocomposite-based high-performance photocatalysts under the solar light.

中文翻译：

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三元Ag@WO3@rGO纳米复合材料在太阳模拟辐照下的优异光催化活性

摘要 Ag@WO3@rGO 三元纳米复合材料是通过两步水热法合成的，其中将第一步水热制备的掺银 WO3 (Ag@WO3) 与还原氧化石墨烯 (rGO) 相结合。 ) 通过超声波辅助的第二水热步骤。Ag 和 rGO 的组合物有助于降低 WO3 的光学带隙能，从而提高 WO3 基纳米复合材料的光催化活性。与太阳模拟照射下的原始 WO3 样品相比，二元 (Ag@WO3) 纳米复合材料对罗丹明 B (RhB) 的降解显示出增加的光催化活性，从 23% (原始 WO3) 到 80% (Ag@WO3) . 值得注意的是，三元（Ag@WO3@rGO）纳米复合材料表现出优异的RhB降解光催化效率（99.5%）。