| 葛建华,张万,丁修龙,卫洲,李佳.S掺杂BiOBr的制备及其光催化固氮性能研究[J].分子催化,2022,36(3):245-252 |
| S掺杂BiOBr的制备及其光催化固氮性能研究 |
| Preparation of S Doped BiOBr Photocatalyst and Its Nitrogen Fixation Performance |
| 投稿时间：2022-03-12 修订日期：2022-04-10 |
| DOI：10.16084/j.issn1001-3555.2022.03.005 |
| 中文关键词: 光催化 固氮 S掺杂 BiOBr |
| 英文关键词:photocatalysis nitrogen fixation S doping BiOBr |
| 基金项目:安徽高校协同创新项目(GXXT-2021-017);2020年度高校优秀人才支持计划项目(gxyq2020012);安徽自然科学基金(1808085ME139) |
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| 中文摘要: |
| 以硫脲、五水硝酸铋为前驱体,采用溶剂热法制备出S掺杂BiOBr光催化剂.利用XRD、SEM、XPS、UV-VisDRS、光电化学性能等对所制备的光催化材料进行了一系列表征.同时,在可见光照射下对S掺杂BiOBr进行光催化固氮性能研究.结果表明:S掺杂BiOBr的晶体结构未发生改变,比表面积增大.同时,形成的氧空位有利于吸附、活化N2分子和促进光生载流子的迁移,进而提高其光催化固氮性能.与BiOBr相比,S掺杂BiOBr的光催化产氨为25.36 mg·L-1·h-1·g-1cat,是BiOBr的4.6倍.最后,经4次循环实验,S掺杂BiOBr催化剂仍保持稳定的光催化固氮效率. |
| 英文摘要: |
| A series of S-doped BiOBr photocatalysts were synthesized using thiourea and Bi(NO3)3·5H2O as precursors through solvothermal process, which were characterized by XRD, SEM, XPS, UV-Vis DRS, photoelectric property. Characterization results revealed that the S-doped BiOBr photocatalyst has identical crystal structure, larger specific surface area and higher photo-induced charge migration ability than that of BiOBr photocatalyst. These properties may contribute to adsorb, activateN2 molecules and enhance the nitrogen photofixation activity. It was also found that the rate of NH4+ production forN2 photofixation of S-doped BiOBr could reached~25.54 mg·L-1 ·h-1 ·g-1cat, which is approximately~4.6 times higher than that of BiOBr. Moreover, after four cycle experiments, the S-doped BiOBr still has high nitrogen fixation efficiency. |
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