| 韩润林,李文翔,王超悦,丁地金.纤维素氧化锰纳米复合材料制备及染料处理性能研究[J].井冈山大学自然版,2022,43(5):14-20 |
| 纤维素氧化锰纳米复合材料制备及染料处理性能研究 |
| PREPARATION OF CELLULOSE/MnO2 NANOCOMPOSITES AND ITS APPLICATION IN DYE WASTE WATER TREATMENT |
| 投稿时间：2022-02-20 修订日期：2022-04-16 |
| DOI：10.3969/j.issn.1674-8085.2022.05.003 |
| 中文关键词: 纤维素 氧化锰 水热合成 纳米复合材料 染料废水处理 |
| 英文关键词: cellulose manganese oxide hydrothermal synthesis nanocomposite materials dye wastewater treatment |
| 基金项目:国家自然科学基金项目(51503089);江西省双千计划创新领军人才项目(jxsq2020101049) |
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| 中文摘要: |
| 纳米氧化锰具有良好的低温催化活性，但纳米粒子在使用过程中容易流失，造成催化活性快速下降。本研究采用纤维素为还原剂和复合材料基体，以高锰酸钾为锰源，在水热条件下制备了纤维素/氧化锰纳米复合材料，研究了制备条件对复合材料的结构与性能的影响规律，以亚甲基蓝为目标污染物测试纳米复合材料在染料废水处理中的性能规律。采用扫描电镜和能谱分析仪等对复合材料的形貌和成分进行了分析。结果表明：通过优化工艺条件，在不添加其他化学试剂的条件下，在120℃条件下采用水热合成法成功制备了含有氧化锰纳米线的复合材料。制备条件温和绿色，所制备的纳米线结构均匀，直径较小，使得产品比表面积和活性较高。所制备的纳米复合材料对亚甲基蓝具有良好的催化降解性能，在中性条件下染料去除率达到96%以上，且在循环4次以后，染料去除率仍在87%以上，表现出良好的循环稳定性。 |
| 英文摘要: |
| Manganese oxide nanomaterials have excellent catalytic performance at low temperature. However, the nanoparticles will run away during the process of use and result the fast decline of catalytic performance. Cellulose/Manganese oxide nanocomposites were prepared under hydrothermal conditions using cellulose as the reducing agent and composite substrate, potassium permanganate for manganese source under hydrothermal conditions. We studied the preparation conditions on the properties of composite material structure and influence law, with methylene blue as the goal pollutant testing performance of nanocomposite materials in dye wastewater treatment. The morphology and composition of the composites were analyzed by scanning electron microscope (SEM) and Energy dispersive X-ray Spectrometry (EDS). The results show that the composite material containing manganese oxide nanowires is prepared with hydrothermal synthesis method at 120 ℃ by optimizing the process conditions without adding other chemical reagents. The preparation conditions are mild and green. The nanowires have uniform structure and small diameter, which makes the specific surface area and activity of the product higher. The prepared nanocomposites have good catalytic degradation performance for methylene blue, and the dye removal rate is above 96% under neutral conditions, and the dye removal rate is still above 87% after 4 cycles, showing good cycling stability. |
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