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| 碳热法合成纳米零价铁-活性炭复合材料性质表征和应用 |
| Characterization and application of nanoscale zero-valent iron-carbon composite synthesized by carbothermal method |
| 投稿时间：2016-11-15 |
| DOI：10.13259/j.cnki.eri.2020.02.001 |
| 中文关键词: 纳米零价铁 活性炭 碳热法 铬去除 |
| 英文关键词:Nanoscale zero-valent iron activated carbon carbothermal method Cr removal |
| 基金项目:上海市自然科学基金资助项目(14ZR1428900)；上海市科委能力建设项目(13230502300)；教育部留学回国科研启动基金资助项目(SEM2013) |
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| 中文摘要: |
| 采用碳热法合成纳米零价铁-活性炭复合材料，原材料采用蔗糖和氯化亚铁。蔗糖和氯化亚铁溶液经过高温热解后，蔗糖成为多孔性活性炭，而氯化亚铁则被还原成零价铁。不同合成温度下所制备材料的X射线衍射结果表明：碳热法能成功合成零价铁，且零价铁颗粒为纳米级；合成温度从500 ℃升至1 100 ℃时，材料中铁含量逐渐增加；电子扫描电镜图像则进一步显示出纳米零价铁被包裹在活性炭结构中；合成材料的比表面积和微孔容积最高分别达到311 m2·g-1和0.053 mL·g-1，为多孔性材料；合成材料对水中的Cr（VI）有很好的去除能力。 |
| 英文摘要: |
| Nanoscale zero-valent iron(NZVI)-carbon composite was synthesized by carbothermal method. The mixed solution of sucrose and ferrous chloride was pyrolized at high temperature. After pyrolysis, sucrose was carbonized to form porous activated carbon while FeCl2 was reduced to zero valent iron. X-ray diffraction (XRD) analysis of the materials pyrolized at different temperatures indicated that zero valent iron in nanometer was successfully produced through the carbothermal treatment. Iron content increased with the increase of temperature from 500 ℃ to 1 100 ℃. Transmission electron microscopy (TEM) images further showed that elemental iron was dispersed and immobilized in the carbon structure. BET surface area and micropore volume reached as high as 311 m2·g-1 and 0.053 mL·g-1, respectively. Synthesized materials demonstrated a high removal capacity for Cr(VI). |
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