近年來，對工業廢水對水生態系統造成有害影響的認識不斷提高，對清潔水的需求促使人們加大對新型催化劑和廢水處理技術的研究。我們的研究小組成功地製備了單金屬硼酸鐵光Fenton催化劑，其催化活性比傳統的Fe3O4奈米顆粒增加了10倍，顯示出卓越的性能。
本研究深入探討了C，N摻雜FeBO3的合成，使用不同的鐵前驅物來提高產量和光Fenton活性。在優化合成之過程中，水熱法在燒結前的應用對於提高合成產量的關鍵。特別是使用17 wt%的Fe2(SO4)3作為前驅物，使產品產量大幅增加，達到2克，而使用Fe3O4奈米顆粒作為鐵前驅物僅為80毫克。值得注意的是，使用Fe2(SO4)3¬作為鐵源合成的C，N摻雜FeBO3在光Fenton降解各種有機污染物的效率優於其他鐵源。
總之，我們通過水熱和鍛燒方法合成了六邊型片狀之碳、氮摻雜硼酸鐵，最佳合成條件為使用17 wt%的硫酸鐵在800 °C下鍛燒。相較於Fe2O3和Fe3O4奈米粒子該催化劑表現出顯著增強的光芬頓活性。在太陽光模擬器下測試時，催化劑在25分鐘內有效降解10 ppm的亞甲基藍、四環黴素和4-硝基酚，其一級反應速率常數分別為1.069, 0.287 and 1.72 min-1。同時也透過捕捉活性氧化物種(ROS)證明OH自由基在降解過程中作為主導作用。也採用Langmuir-Hinshelwood 模型評估碳、氮摻雜硼酸鐵的表面反應機制。XRD分析表明，在經過五輪反應過後，催化劑仍保持穩定，進一步表示適使用於汙水處理。
此外 本研究還探討了硼酸鐵合成中的固態反應機制。這一全面的探索揭示了形成碳、氮摻雜硼酸鐵之複雜過程。為其在各條件下有機汙染物光芬頓降解中之催化性能提供寶貴的見解。總之，這項研究開發了一種有前景之催化劑，旨在推進可持續解決之方案來處理廢水問題，解決全球都在關注之環境水汙染問題。

In recent years, the escalating awareness of the deleterious impact of industrial wastewater on aquatic ecosystems and the accessibility of clean water has prompted intensified research into developing novel catalysts and technologies for wastewater treatment. Our research group has successfully developed a single-component metal borate photo-Fenton catalyst, demonstrating a remarkable 10-fold increase in catalytic activity compared to conventional Fe3O4 nanoparticles.
This study delves into optimizing the synthesis of C, N-doped FeBO3, employing diverse iron precursors to enhance both yield and photo-Fenton activity. A hydrothermal process, introduced before calcination, proved instrumental in optimizing the synthesis. Particularly, the utilization of 17 wt% Fe2(SO4)3 as a precursor resulted in a substantial increase in product yield, yielding 2 g (20% yield) compared to the 80 mg (8% yield) obtained using Fe3O4 nanoparticles as the iron precursor. Notably, the C, N-doped FeBO3 synthesized with Fe2(SO4)3 demonstrated superior photo-Fenton degradation efficiency against various organic pollutants when compared to alternative iron sources.
In summary, we synthesized hexagonal plate C, N-doped FeBO3 using hydrothermal and calcination methods from an optimal synthesis employing 17 wt% of iron sulfate at 800 °C. The catalyst exhibited significantly enhanced photo-Fenton activity over Fe2O3 and Fe3O4 nanoparticles. When tested under a solar simulator, the C, N-doped FeBO3 efficiently degraded 10 ppm methylene blue (MB), tetracycline (TC), and 4-nitrophenol (4-NP) within 25 minutes, with first-order kinetics of 1.069, 0.287 and 1.72 min-1, respectively. Trapping experiments suggest that •OH plays a dominant role as the reactive oxygen species (ROS) in the degradation process. The Langmuir-Hinshelwood model was employed to evaluate the surface reaction mechanism of the C, N-doped FeBO3. The catalyst remained stable, evidenced by XRD analysis, after five rounds of reactions, indicating suitability for use in wastewater treatment.
Furthermore, this study investigated the solid-state reaction mechanism underlying the synthesis of iron borate. This comprehensive exploration sheds light on the intricate processes involved in forming C, N-doped FeBO3, providing valuable insights into its catalytic performance in the photo-Fenton degradation of organic pollutants under various conditions. In summary, this research develops a promising catalyst for the advancement of sustainable solutions for wastewater treatment, addressing the pressing global concerns surrounding water pollution.

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