A novel 3D BiFeWO_x/Bi₂WO₆ (BFW/BWO) composite has been synthesized via a facile one-pot hydrothermal process. A tight chemically bonded interface between the BFW and BWO could be constructed by this simple and environmentally benign method. The composite structures and chemical properties were investigated by XRD, FE-SEM, HR-TEM and EDS. The photocatalytic performances of the as-synthesized materials were assessed by photocatalytic oxidation (PCO) of NO under visible light illumination. The optimum BFW/BWO-1 composite exhibited 87% PCO efficiency, which was higher than that of the single phase BWO and BFW. The enhancement of the photocatalytic activity of the BFW/BWO-1 composite was ascribed to the effective separation and reduced recombination rate of the photoinduced charge carriers, evinced by transient photocurrent, EIS and PL measurements. The radical trapping experiment and DMPO spin-trapping ESR measurement revealed that H⁺ and ˙OH were the important active species. The tests for stability and recyclability revealed that the BFW/BWO-1 composite could be a desired photocatalyst for the oxidation of NO in the ecosystem. The kinetics and possible mechanism for the PCO of NO on the BFW/BWO-1 composites were discussed.

中文翻译：

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一步水热合成新型具有优异可见光光催化活性的3D BiFeWO _x / Bi ₂ WO ₆复合材料

新型3D BiFeWO _x / Bi ₂ WO ₆（BFW / BWO）复合材料已通过简单的一锅热液过程。通过这种简单且环境友好的方法，可以在BFW和BWO之间建立紧密的化学键合界面。通过XRD，FE-SEM，HR-TEM和EDS对复合材料的结构和化学性能进行了研究。在可见光照射下，通过NO的光催化氧化（PCO）评估了合成后材料的光催化性能。最佳的BFW / BWO-1复合材料的PCO效率为87％，高于单相BWO和BFW的PCO效率。BFW / BWO-1复合材料的光催化活性的增强归因于瞬态光电流，EIS和PL测量结果表明，光诱导电荷载体的有效分离和重组率降低。⁺和˙OH是重要的活性物种。稳定性和可回收性测试表明，BFW / BWO-1复合材料可能是生态系统中NO氧化的理想光催化剂。讨论了BFW / BWO-1复合材料上NO PCO的动力学及其可能的机理。