中文摘要：

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-Vis DRS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。

英文摘要：

In situ N-doped （BiO）2CO3 hierarchical microspheres were fabricated by a one-pot hydrothermal method using dicyandiamide and bismuth citrate as raw materials. The as-prepared samples were characterized by XRD, SEM, FT-IR, UV-vis DRS and PL. The results indicated that the addition of dicyandiamide has significant impact on morphological structure, band gap and electronic-hole recombination rate of the as-prepared （BiO）2CO3. During the hydrothermal process, bismuth citrate were hydrolyzed by dicyandiamide, and N atoms were in situ doped into the （BiO）2CO3 lattice. N doping made the light response spectra of （BiO）2CO3 extend into visible light region significantly. The band gap narrowing of （BiO）2CO3 due to N doping was evidenced by valence band XPS. The in situ N-doped （BiO）2CO3 hierarchical microspheres structure showed excellent visible light photocatalytic activity toward aqueous Rh B and gas-phase NO degradation, which was higher than N-doped TiO2 and C-doped TiO2. The present investigation has significant implication on extending the effect of N doping into non-TiO2 system.