| 王锦,肖瑜欣,张红杰,王赛迪,张文晖.生物炭负载Fe0/Fe3O4异质结的可控制备及其染料去除性能研究[J].中国造纸,2026,45(9):21-28 |
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| 生物炭负载Fe0/Fe3O4异质结的可控制备及其染料去除性能研究 |
| Controllable Preparation of Biochar-Supported Fe0/Fe3O4 Heterojunctions and Its Dye Removal Performance |
| 收稿日期：2026-03-12 修订日期：2026-03-26 |
| DOI：10.11980/j.issn.0254-508X.2026.09.003 |
| 关键词: 非均相Fenton 生物炭负载铁基催化剂 水热调控 亚甲基蓝 |
| Key Words:heterogeneous Fenton biochar-supported iron-based catalyst hydrothermal regulation methylene blue |
| 基金项目:天津市自然科学基金资助项目25JCYBJC00220天津市自然科学基金资助项目（25JCYBJC00220）。 |
| 作者 | 单位 | 邮编 | | 王锦* | 1天津科技大学轻工科学与工程学院,天津,300457 | 300457 | | 肖瑜欣 | 1天津科技大学轻工科学与工程学院,天津,300457 | 300457 | | 张红杰 | 2中国制浆造纸研究院 有限公司,北京,100102 | 100102 | | 王赛迪 | 1天津科技大学轻工科学与工程学院,天津,300457 | 300457 | | 张文晖* | 1天津科技大学轻工科学与工程学院,天津,300457 | 300457 |
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| 摘要:本研究以Fenton污泥和黑液酸析物为前驱体，通过热解-乙醇/水热联用工艺制备生物炭负载铁基催化剂（Fe@BC催化剂），并调控热处理液中乙醇/水体积比，实现Fe0向Fe3O4的可控转化与Fe0/Fe3O4异质结的原位精准构筑。结果表明，乙醇/水热处理可有效调控Fe0向Fe3O4转化并形成异质结；比表面积可达266.5~444.2 m2/g，呈现分级多孔结构。经纯水水热处理制得的Fe@BCE0催化剂催化效果最佳，在25 mmol/L H2O2、中性pH条件下对亚甲基蓝（MB）的去除率达91.3%，且对阳离子染料具有广谱适应性。3次循环后去除率仍保持86.9%，铁浸出浓度仅为0.49 mg/L，催化剂物相结构稳定。机理研究表明，·OH是体系中的主导活性氧物种，MB降解以非均相催化反应为主导。 |
| Abstract:Biochar-supported iron-based catalysts (Fe@BC catalysts) were prepared via a pyrolysis-combined use of ethanol/water heating process using Fenton sludge and black liquor acid precipitate as precursors. The ethanol/water volume ratio in hydrothermal solvent was regulated to realize the controllable transformation of Fe0 to Fe3O4 and the in-situ precise construction of Fe0/Fe3O4 heterojunctions. The results showed that hydrothermal treatment could effectively regulate the transformation of Fe0 to Fe3O4 and in-situ form Fe0/Fe3O4 heterojunctions. The specific surface area ranged from 266.5 to 444.2 m²/g， and the catalysts exhibited a hierarchical porous structure. The optimal Fe@BCE0 catalyst obtained by hydrothermal treatment with pure water possessed the best catalytic performance. Under the conditions of 25 mmol/L H2O2 and neutral pH， Fe@BCE0 achieved a methylene blue (MB) removal efficiency of 91.3%， and showed broad adaptability toward cationic dyes. After three cycles， the removal efficiency remained at 86.9%. The iron leaching concentration was 0.49 mg/L， indicating the stable phase structure of the catalyst. Mechanism investigations revealed that ·OH was the dominant reactive oxygen species in the system， and MB degradation was mainly governed by heterogeneous catalytic reactions. |
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