| 李开文,刘浩然,王大伟,程文博,常飞.FeOOH/生物炭复合材料制备及光芬顿降解性能研究[J].有色金属材料与工程,2025,46(6):69-76. |
| FeOOH/生物炭复合材料制备及光芬顿降解性能研究 |
| Synthesis and photo-fenton performance of FeOOH/biochar composites |
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| DOI：10.13258/j.cnki.nmme.20251029001 |
| 中文关键词: FeOOH复合材料 改性生物炭 光芬顿 罗丹明B |
| 英文关键词:FeOOH composite modified biochar photo-Fenton Rhodamine B |
| 基金项目:国家重点研发计划项目（2024YFE0211700） |
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| 中文摘要: |
| 采用原位沉积法制备了一系列FeOOH/生物炭复合材料，并对其微观结构和形貌进行了分析表征，证实样品成功合成。紫外可见漫反射光谱证实，引入生物炭可显著增强可见光吸收。罗丹明 B（Rhodamine B，RhB）光芬顿催化降解结果表明：FeOOH与生物炭质量比为 5% 的FC-5材料降解效率最佳，表明适量的碳作为载体可暴露更多的铁活性位点，促进光芬顿反应进行。另外，光辐照对反应效率影响较小，当H2O2浓度为 25 mmol/L、溶液 pH=3 时，RhB的降解效率达到最佳。物种捕捉试验表明，·OH是降解过程中的主要活性物种，空穴发挥次要作用。经过 3 次循环后，复合材料的降解效率仅下降 10%，证明其具备良好的结构稳定性与重复利用性。 |
| 英文摘要: |
| A series of FeOOH/biochar composites were prepared by a facile in-situ deposition method, and their microstructure and morphology were further analyzed and characterized, confirming the successful synthesis of the samples. The UV-vis DRS spectra revealed that the introduction of biochar could significantly enhance visible-light absorption. The photo-Fenton catalytic degradation experiments of Rhodamine B (RhB) indicated that the FC-5 composite with a FeOOH/biochar mass ratio of 5% exhibited the best degradation efficiency, suggesting that an appropriate amount of carbon as a support facilitates the exposure of more iron active sites and thus promotes the photo-Fenton reaction. Moreover, visible-light irradiation had a relatively small impact on the reaction efficiency, and the degradation efficiency of RhB reached the optimum when the H2O2 concentration was 25 mmol/L and the solution pH was 3. Radical trapping experiments demonstrated that hydroxyl radicals were the main active species in the degradation process, while holes played a secondary role. After 3 cycles of use, the degradation efficiency of the composite only decreased by 10%, proving that it possesses excellent structural stability and reusability. |
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