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基于再生钢渣的磁性活化催化剂降解黑液的作用机理洞察

Insight mechanism of magnetic activated catalyst derived from recycled steel residue for black liquor degradation.

作者信息

Flores-López Zacek David, Solís-Díaz Aylín Belén, Cervantes-Aviles Pabel Antonio, Thangarasu Pandiyan, Kumar Deepak, Kaur Harpreet, Singh Jashanpreet, Lokande Prasad, Huerta-Aguilar Carlos Alberto, Mubarak Nabisab Mujawar

机构信息

Ingeniería en Nanotecnología, Universidad de La Ciénega del Estado de Michoacán, 59103, Sahuayo, Michoacán, Mexico.

Instituto de Biociencias, Universidad Autónoma de Chiapas, 30798, Tapachula, Chiapas, Mexico.

出版信息

Sci Rep. 2024 Aug 17;14(1):19057. doi: 10.1038/s41598-024-70072-8.

DOI:10.1038/s41598-024-70072-8
PMID:39154070
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11330496/
Abstract

The present work deals with developing a method for revalorizing steel residues to create sunlight-active photocatalysts based on iron oxides. Commercial-grade steel leftovers are oxidized under different combinations of pH and temperature (50-90 °C and 3 ≥ pH ≤ 5) in a low energy-intensive setup. The material with the highest production efficiency (yield > 12%) and magnetic susceptibility (χ = 387 × 10 m/kg) was further explored and modified by diffusion of M (Zn and Co) ions within the structure of the oxide using a hydrothermal method to create ZnFeO, CoFeO and combined Co-Zn ferrite. (Co-Zn)FeO displayed a bandgap of 2.02 eV and can be activated under sunlight irradiation. Electron microscopy studies show that (Co-Zn)FeO consists of particles with diameters between 400 and 700 nm, homogeneous size, even distribution, and good dispersibility. Application of the developed materials in the sunlight catalysis of black liquors from cellulose extraction resulted in a reduction of the Chemical Oxygen Demand (- 15% on average) and an enhancement in biodegradability (> 0.57 BOD/COD) after 180 min of reaction. Since the presented process employs direct solar light, it opens the possibility to large-scale water treatment and chemical upgrading applications.

摘要

本工作致力于开发一种方法，将钢渣再利用，以制备基于氧化铁的阳光活性光催化剂。商业级钢废料在低能耗装置中，于不同的pH值和温度组合（50 - 90°C，3≤pH≤5）下进行氧化。对生产效率最高（产率>12%）且磁化率（χ = 387×10⁻⁶ m³/kg）的材料，采用水热法通过M（锌和钴）离子在氧化物结构内扩散进行进一步探索和改性，以制备ZnFeO、CoFeO和复合Co-Zn铁氧体。(Co-Zn)FeO的带隙为2.02 eV，可在阳光照射下被激活。电子显微镜研究表明，(Co-Zn)FeO由直径在400至700纳米之间的颗粒组成，尺寸均匀，分布均匀，分散性良好。将所开发的材料应用于纤维素提取黑液的阳光催化，反应180分钟后，化学需氧量平均降低了15%，生物降解性提高（BOD/COD>0.57）。由于所提出的工艺采用直接太阳光，为大规模水处理和化学升级应用开辟了可能性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc30/11330496/401051c120dd/41598_2024_70072_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc30/11330496/4f455c5fc677/41598_2024_70072_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc30/11330496/2a4f40c808aa/41598_2024_70072_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc30/11330496/4c2e38fef9b3/41598_2024_70072_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc30/11330496/79f3f26bce23/41598_2024_70072_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc30/11330496/1467c93811c5/41598_2024_70072_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc30/11330496/a183faa89dfc/41598_2024_70072_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc30/11330496/401051c120dd/41598_2024_70072_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc30/11330496/4f455c5fc677/41598_2024_70072_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc30/11330496/2a4f40c808aa/41598_2024_70072_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc30/11330496/4c2e38fef9b3/41598_2024_70072_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc30/11330496/79f3f26bce23/41598_2024_70072_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc30/11330496/1467c93811c5/41598_2024_70072_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc30/11330496/a183faa89dfc/41598_2024_70072_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc30/11330496/401051c120dd/41598_2024_70072_Fig7_HTML.jpg

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