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Recycling Molybdenum Oxides from Waste Molybdenum Disilicides: Oxidation Experimental Study and Photocatalytic Properties
Oxidation of Metals ( IF 2.2 ) Pub Date : 2019-04-16 , DOI: 10.1007/s11085-019-09909-x
Ge Kong , Xiaoni Du , Xiaoping Cai , Peizhong Feng , Xiaohong Wang , Farid Akhtar

To recycle elemental molybdenum from waste molybdenum disilicide (MoSi2) heating elements, the MoSi2 was first disintegrated to MoO3 and SiO2 powders in air at a pest oxidation temperature of 500 °C. X-ray diffraction (XRD) patterns confirmed the completion of the pest oxidation reaction. The mixture of MoO3 and SiO2 powders were heated to 950 °C in a tube furnace to evaporate MoO3, and the XRD patterns of the residue showed that only SiO2 was left in the crucible, confirming that the MoO3 was removed through thermal evaporation. The collected MoO3 crystals had a striped morphology. Photocatalytic performance of MoO3 showed superior activity in comparison with commercial MoO3 and P25 for the degradation of methylene blue under visible light irradiation. The photocatalytic degradation activity of MoO3 synthesized by thermal evaporation at 950 °C was 99.25% in 60 min.

中文翻译:

从废二硅化钼中回收氧化钼:氧化实验研究及光催化性能

为了从废二硅化钼 (MoSi2) 加热元件中回收元素钼,首先在空气中在 500 °C 的害虫氧化温度下将 MoSi2 分解为 MoO3 和 SiO2 粉末。X 射线衍射 (XRD) 图案证实了害虫氧化反应的完成。将 MoO3 和 SiO2 粉末的混合物在管式炉中加热至 950 °C 以蒸发 MoO3,残留物的 XRD 谱显示坩埚中仅剩下 SiO2,证实通过热蒸发去除了 MoO3。收集到的 MoO3 晶体具有条纹形态。与商业 MoO3 和 P25 相比,MoO3 的光催化性能在可见光照射下降解亚甲基蓝显示出优异的活性。
更新日期:2019-04-16
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