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More octahedral Cu+ and surface acid sites in uniformly porous Cu-Al2O3 for enhanced Fenton catalytic performances
Journal of Hazardous Materials ( IF 13.6 ) Pub Date : 2020-12-02 , DOI: 10.1016/j.jhazmat.2020.124739
Lingfei Li , Chun Hu , Lili Zhang , Baoyou Shi

Porous Cu-doped alumina (P-Cu-Al2O3) has been synthesized using ammonium chloride as a green gaseous template. The unique pore-forming agent endows the catalyst a large surface area and homogenous pore structure. According to the characterization results by multi-technologies, the highly dispersed framework Cu+/Cu2+ was incorporated in octahedral sites with the formation of the Cu-O-Al bonds. Compared with bulk Cu-doped Al2O3 (B-Cu-Al2O3), more surface acidic oxygen-containing groups and Lewis acid sites existed in P-Cu-Al2O3, resulting in the production of surface adsorbed OH, which is helpful for the removal of surface adsorbed organic intermediates. In addition, O2 more easily participate in surface reaction to promote the OH generation in P-Cu-Al2O3 system than that in B-Cu-Al2O3. As a result, the representative endocrine disruptor bisphenol A can be more efficiently mineralized by P-Cu-Al2O3. This work provides a facile route to develop porous active heterogenous Fenton-like catalysts and a unique perspective to insight into the structure-activity relationship.



中文翻译:

在均匀多孔的Cu-Al 2 O 3中具有更多的八面体Cu +和表面酸位,以增强Fenton催化性能

已经使用氯化铵作为绿色气态模板合成了多孔掺杂铜的氧化铝(P-Cu-Al 2 O 3)。独特的成孔剂使催化剂具有较大的表面积和均匀的孔结构。根据多种技术的表征结果,高度分散的骨架Cu + / Cu 2+被引入八面体部位,形成Cu-O-Al键。与块状Cu掺杂Al 2 O 3(B-Cu-Al 2 O 3)相比,P-Cu-Al 2 O 3中存在更多的表面酸性含氧基团和路易斯酸位,从而产生表面吸附的 OH,有助于去除表面吸附的有机中间体。此外,O- 2更容易参与表面反应促进 OH产生在P-铜铝2 ö 3系统比B-铜铝2 ö 3。结果,代表性的内分泌干扰物双酚A可以被P-Cu-Al 2 O 3更有效地矿化。这项工作提供了开发多孔活性均相Fenton状催化剂的简便途径,并且为洞悉结构与活性之间的关系提供了独特的视角。

更新日期:2020-12-02
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