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纳米片自组装原位N掺杂(BiO)2CO3分级微球的可控合成及其优异可见光催化性能

Keywords: 水热法,(BiO)2CO3,原位N掺杂,光催化,可见光

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Abstract:

以二氰二胺和柠檬酸铋为原料,采用一步水热法合成原位N掺杂(BiO)2CO3纳米片自组装分等级微球结构。采用XRD、SEM、XPS、FT-IR、UV-VisDRS和PL等对合成的材料进行表征,结果表明,不同二氰二胺加入量会对(BiO)2CO3的形貌结构、禁带宽度以及电子-空穴复合率产生显著影响。二氰二胺在水热过程水解柠檬酸铋,同时N原子原位掺杂进入(BiO)2CO3晶格。N掺杂使(BiO)2CO3的光响应范围大幅拓展至可见光,通过价带XPS获得了掺杂N元素减小(BiO)2CO3禁带宽度的证据。在可见光照射下,原位N掺杂(BiO)2CO3分等级微球结构表现出对液相罗丹明B和气相NO优异的可见光催化降解活性,高于N掺杂TiO2和C掺杂TiO2。研究结果对拓展N掺杂作用向非TiO2体系的转变具有重要意义。

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