| 介孔结构的α-FeOOH对苯酚的催化臭氧化降解 |
| Catalytic Ozonation Degradation of Phenol in Water by Mesoporous α-FeOOH |
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| 摘要: 以双氧水和硫酸亚铁为原料，采用绿色简便水热法得到了高比表面的羟基氧化铁纳米催化剂，提出将α-FeOOH纳米材料用作臭氧化催化剂。X射线粉末衍射(XRD)、透射电镜(TEM)、低温氮吸附脱附表征结果证明催化剂组成为α-FeOOH，形貌为直径13～20 nm、长度70～100 nm具有介孔结构的棒状物，Brunauer-Emmett-Teller(BET)比表面积达到132 m2·g-1，碱滴定分析表明所得催化剂的表面羟基密度高达5.484 mmol·g-1，该纳米材料对臭氧化降解水中苯酚显示了优异的催化性能。机理研究表明，具有高比表面、高表面羟基密度以及合适的pHpzc值的纳米α-FeOOH催化剂，在多相催化反应中促进了臭氧分子到羟基自由基的转变，从而加快了苯酚的降解。 |
| 关键词: 羟基氧化铁 纳米 臭氧化 水处理 苯酚 |
| 基金项目: |
| Abstract: Using FeSO4·7H2O and H2O2 as raw materials, α-FeOOH nano-catalyst with larger surface area was prepared by a facile and green hydrothermal synthesis route. The material was characterized by XRD, TEM and N2 adsorption-desorption. The mesoporous catalyst is composed of α-FeOOH nanorods with diameter of 13～20 nm, length of 70～100 nm. The catalyst has a larger Brunauer-Emmett-Teller(BET) surface area of 132 m2·g-1 and higher density of surface hydroxyl groups of 5.484 mmol·g-1. The nano-catalyst exhibited excellent catalytic performance in the ozonation degradation of phenol in water. The mechanism study revealed that the transformation from ozone molecules to hydroxyl radicals and the acceleration on ozonation degradation of phenol were enhanced by the nano-catalyst with higher specific surface area, surface hydroxyl groups and proper pHpzc value during the heterogeneous catalysis process. |
| Keywords: α-FeOOH nanometer ozonation water treatment phenol |
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| 董玉明,蒋平平,张爱民.介孔结构的α-FeOOH对苯酚的催化臭氧化降解[J].无机化学学报,2009,25(9):1595-1600. |
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