Abstract Diatomite is mined in Phu Yen province, Vietnam and the Fe2O3-diatomite materials are synthesized by a simple process for the photo-Fenton reaction of rhodamine B (RhB) degradation. The pure diatomite and Fe2O3-diatomite materials have the large pore structures representing the high adsorption ability and efficient photocatalysis. Characterizations of diatomite-Fe2O3 materials were determined by X-ray diffraction (XRD), FT-IR analysis, field emission scanning electron microscopy (FE-SEM) images, dynamic light scattering (DLS), and inductively coupled plasma mass spectrometry (ICP-MS) analysis. The catalytic activitiy of the Fe2O3-diatomite materaisl was evaluated by the degradation of the RhB dye under visible light irradiation in the effect of hydrogen peroxide (H2O2). The results show that the 3% Fe2O3-diatomite sample has the highest RhB photocatalytic degradation efficiency with approximately 81% for 150 min under visible light. This value is 2 times higher than the degradation efficiency of the pure diatomite. In addition, the Fe2O3-diatomite photocatalysts are indicated as potential materials for photo-Fenton degradation of organic contaminants due to their highly stable abilities.

中文翻译：

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罗丹明 B 在 Fe2O3-硅藻土材料上的可见光诱导光芬顿降解

摘要 越南富安省开采硅藻土，通过简单的光芬顿反应降解罗丹明B (RhB) 合成Fe2O3-硅藻土材料。纯硅藻土和Fe2O3-硅藻土材料具有大孔结构，代表高吸附能力和高效光催化。硅藻土-Fe2O3 材料的表征通过 X 射线衍射 (XRD)、FT-IR 分析、场发射扫描电子显微镜 (FE-SEM) 图像、动态光散射 (DLS) 和电感耦合等离子体质谱 (ICP- MS) 分析。Fe2O3-硅藻土材料的催化活性通过在可见光照射下在过氧化氢 (H2O2) 的作用下降解 RhB 染料来评估。结果表明，3% Fe2O3-硅藻土样品具有最高的RhB光催化降解效率，在可见光下150分钟约为81%。该值比纯硅藻土的降解效率高2倍。此外，Fe2O3-硅藻土光催化剂由于其高度稳定的能力而被认为是光芬顿降解有机污染物的潜在材料。