| 纳米级Pd/Fe双金属体系对水中2,4-二氯苯酚脱氯的催化作用 |
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| 引用本文： | 徐新华,刘永,卫建军,汪大翚. 纳米级Pd/Fe双金属体系对水中2,4-二氯苯酚脱氯的催化作用[J]. 催化学报, 2004, 25(2): 138-142 |
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| 作者姓名： | 徐新华 刘永 卫建军 汪大翚 |
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| 作者单位： | 浙江大学环境工程系,浙江杭州,310027;浙江大学环境工程系,浙江杭州,310027;浙江大学环境工程系,浙江杭州,310027;浙江大学环境工程系,浙江杭州,310027 |
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| 基金项目： | 国家教育部留学回国人员基金资助项目 ( 2 0 0 2 2 47)，国家科技部国际合作项目 (AM 10 :15) |
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| 摘 要： | 利用化学沉淀法制备了纳米级Fe和纳米级Pd/Fe双金属催化剂,研究了它们对2,4-二氯苯酚(2,4-DCP)还原脱氯的催化性能. 结果表明,纳米级颗粒具有较高的比表面积和表面反应活性,其BET比表面积可达12.4 m2/g,当Pd/Fe用量为6 g/L时,2,4-DCP脱氯率达到90%以上. 脱氯效率与pH值、温度、钯含量和Pd/Fe投加量等因素有关. 2,4-DCP在脱氯过程中先生成2-氯苯酚和4-氯苯酚,最终生成苯酚,而少量的2,4-DCP可直接降解成苯酚.
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| 关 键 词： | 钯 铁 纳米级催化剂 2 4-二氯苯酚 催化脱氯 |
| 文章编号： | 0253-9837(2004)02-0138-05 |
| 收稿时间： | 2004-02-25 |
Catalytic Dechlorination of 2,4-Dichlorophenol in Water by Nanoscale Pd/Fe Bimetallic System |
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| XU Xinhua ,LIU Yong,WEI Jianjun,WANG Dahui. Catalytic Dechlorination of 2,4-Dichlorophenol in Water by Nanoscale Pd/Fe Bimetallic System[J]. Chinese Journal of Catalysis, 2004, 25(2): 138-142 |
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| Authors: | XU Xinhua LIU Yong WEI Jianjun WANG Dahui |
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| Affiliation: | XU Xinhua *,LIU Yong,WEI Jianjun,WANG Dahui |
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| Abstract: | Nanoscale Fe and nanoscale Pd/Fe bimetallic catalysts were prepared by chemical deposition and used to treat 2,4-dichlorophenol (2,4-DCP) in water. These nanoscale particles are characterized by high surface area to volume ratios and high reactivity. Their BET specific surface area reaches 12.4 m 2/g. Batch experiments demonstrate that the nanoscale Pd/Fe particles can effectively dechlorinate 2,4-DCP at a relatively low metal to solution ratio of 6 g/L. Dechlorination efficiency is 90% at a Pd to Fe mass ratio of 0.11%. Dechlorination is affected by the reaction temperature, pH, Pd/Fe ratio and amount of nanoscale Pd/Fe. 2-chlorophenol and 4-chlorophenol represent stable partially dechlorinated intermediates in the generation of phenol. |
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| Keywords: | palladium iron nanoscale catalyst 2 4-dichlorophenol catalytic dechlorination |
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