| 铜负载卤氧化物光催化二氧化碳还原性能 |
| Photocatalytic performance of copper-supported oxyhalides for carbon dioxide reduction |
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| 摘要: 通过熔盐法合成了Bi2YO4Cl，并在其表面光沉积金属助催化剂(Cu、Pd、Ni和Pt)，研究其可见光下CO2还原反应性能。结果表明，助催化剂的活性提升顺序是Cu/Bi2YO4Cl>Pd/Bi2YO4Cl>Bi2YO4Cl>Ni/Bi2YO4Cl>Pt/Bi2YO4Cl，其中Cu助催化剂担载量(质量分数)为1%的Bi2YO4Cl纳米片光催化CO2还原性能最优，CO、CH4和C2H4的产量分别是44.7、35.3和18.0 μmol·h-1·g-1。这可能是由于Cu助催化剂提供了光催化CO2还原反应位点，有利于促进CH4生成，而Pt、Ni助催化剂更有利于促进H2生成，因此担载Pt、Ni助催化剂的活性低于本体。此外，反应体系为气-液-固三相，有利于光催化剂的回收循环利用。 |
| 关键词: 光催化 二氧化碳还原 卤氧化物 电荷分离 催化转化 |
| 基金项目: 河北省自然科学基金(No.B2022202049)资助。 |
| Abstract: Bi2YO4Cl was synthesized through a molten salt, and metal cocatalysts (Cu, Pd, Ni, and Pt) were photodeposited on its surface for a visible light-responsive CO2 reduction reaction. The results showed that the order of activity enhancement of the cocatalysts was Cu/Bi2YO4Cl> Pd/Bi2YO4Cl> Bi2YO4Cl> Ni/Bi2YO4Cl> Pt/Bi2YO4Cl, among which the Bi2YO4Cl nanosheets loaded with a mass fraction of 1% Cu cocatalysts yielded the best photocatalytic CO2 reduction performance of 44.7, 35.3, and 18.0 μmol·h-1·g-1 for CO, C2H4, and C2H4 respectively. The possible reason is that the support of Cu cocatalyst provides photocatalytic CO2 reduction reaction sites, especially the Cu cocatalyst is conducive to promoting the preparation of C2H4. However, Pt and Ni cocatalysts are more conducive to H2 preparation, so the activities of Pt and Ni-loaded catalysts are lower than those of bulk catalysts. In addition, the reaction system is a gas-liquid-solid three-phase system, which is conducive to the recovery and recycling of photocatalysts. |
| Keywords: photocatalysis carbon dioxide reduction oxyhalide charge separation catalytic conversion |
| 投稿时间：2024-04-25 修订日期：2024-11-18 |
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