A Brønsted-Lewis-surfactant-combined heteropolyacid (HPA) Cr[(DS)H(2)PW(12)O(40)](3) has been synthesized, and is used as a heterogeneous catalyst for the conversion of cellulose to 5-hydroxymethylfurfural in one pot within 2 h at 150 °C with 77.1% conversion and 52.7% yield. This micellar HPA catalyst shows stability and can be recycled by simple separation process.
One-dimensional MoO 3 nanofibers doped with Ce (MoO 3 : CeO 2 ) are synthesized by a method combining a sol-gel process and an electrospinning technique. The resulting MoO 3 : CeO 2 is characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FT-IR) spectroscopy, and scanning electron microscopy (SEM). The catalytic degradation of rhodamine B and safranin-T with MoO 3 : CeO 2 nanofiber catalyst is investigated in a continuous flowing mode using air (O 2 ) as an oxidant. The results show that rhodamine B and safranin-T are degraded effectively and the removal efficiencies are 98.3%, and 98.5%, respectively. In addition, the organic dyes are totally mineralized to simple inorganic species such as CO 3 -, Cl -and NO 3 -.
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