| 摘要: |
| 【目的】研究掺杂的活性炭负载型TiO2（TiO2/AC）光催化剂，在紫外光作用下对酸性橙Ⅱ（AO7）的去除效果，以寻求一种在有机废水处理中催化活性较高且易回收的光催化剂。【方法】用硝酸铁和尿素分别作Fe源和N源，以活性炭（AC）为载体，采用溶胶 凝胶和浸渍 焙烘相结合的方法，制备出Fe、N单独掺杂及Fe-N共掺杂TiOn/AC光催化剂，分析其对AO7的去除效果。【结果】单独掺杂制备的TiO2/AC催化剂对AO7的去除率随着掺Fe量（n（Fe）∶n（Ti））和掺N量（n（N）∶n（Ti））的增加先升高后降低，当n（Fe）∶n（Ti）和n（N）∶n（Ti）分别为0.1%和3.2%时，AO7的去除效果较佳。Fe-N共掺杂制备的TiO2/AC催化剂中，Fe、N和Ti的物质的量比为0.2%∶4.8%∶1时，催化剂具有较好的催化性能，经过3 h的光催化反应，AO7的去除率可达到90.5%。【结论】Fe-N共掺杂对TiO2/AC的催化性能具有协同作用，其催化能力明显优于Fe、N单独掺杂样品。 |
| 关键词: 活性炭 TiO2 掺杂 光催化降解 染料废水 |
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| 基金项目:国家自然科学基金项目（21107085）；西北农林科技大学基本科研业务费项目 |
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| Photo-catalytic degradation of acid orange Ⅱ using TiO2 loaded activated carbon doped with Fe and N |
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QU Guang-zhou,ZHA Kang-da,LIANG Dong-li,et al
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| Abstract: |
| 【Objective】Effects doping TiO2 loaded activated carbon (TiO2/AC) photo catalysts on removal of acid orange Ⅱ (AO7) by UV photo-catalysis were studied for seeking a photo-catalyst with high catalytic activity and easy recovery in wastewater treatment.【Method】TiO2 loaded activated carbon (TiO2/AC) photo-catalyst doped with Fe or N was prepared by sol-gel and curing impregnation methods using iron nitrate and urea as Fe and N sources,respectively.【Result】Using TiO2/AC photo-catalysts singly doped with Fe or N,the removal efficiency of AO7 reduced after the initial increase with the increase of doping amount of Fe(n(Fe)∶n(Ti)) and N(n(N)∶n(Ti)).The highest remove efficiency was obtained when Fe and N content were 0.1% and 3.2%,respectively.Doping with both Fe and N,the highest removal efficiency of A07 after 3 h photo-catalytic reaction was up to 90.5% when n(Fe)∶(n(N)∶n(Ti) was 0.2%∶4.8%∶1.【Conclusion】The photo-catalytic activity of TiO2/AC doped with both Fe and N was significantly higher than that of photo-catalysts singly doped with Fe or N through synergy effects. |
| Key words: activated carbon TiO2 doping photo-catalytic degradation dye wastewater |
