| 唐立平,张会明,郭文杰,胡莹莹,贾晶晶.一步热聚合法制备K、Mn共掺杂g-C3N4复合光催化剂应用于CO2还原[J].分子催化,2023,37(1):43-52 |
| 一步热聚合法制备K、Mn共掺杂g-C3N4复合光催化剂应用于CO2还原 |
| Preparation of K and Mn-modifed g-C3N4 Photocatalyst by a Facile One-pot Calcination Method for Enhanced Photocatalytic CO2 Reduction |
| 投稿时间：2022-10-11 修订日期：2022-11-30 |
| DOI：10.16084/j.issn1001-3555.2023.01.005 |
| 中文关键词: 光催化 CO2还原 g-C3N4 共掺杂 |
| 英文关键词:photocatalysis CO2 reduction g-C3N4 co-doped |
| 基金项目:国家自然科学基金项目(No.51904032);滨州学院博士学位人员及具有硕士学位的高级职称人员科研启动经费项目(No.2018Y16) |
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| 中文摘要: |
| 以尿素和KMnO4为原料,采用一步热聚合法制备了K、Mn共掺杂g-C3N4复合催化剂,并将其应用于光催化CO2还原.XRD、FT-IR、TEM-EDS、XPS表征结果表明,K和Mn元素成功地共掺杂到g-C3N4骨架构成n-π*共轭形式,部分Mn元素以MnO2的形式存在.通过色谱对产物进行检测,所有样品的主要产物为CO和CH4,其中K、Mn共掺杂g-C3N4样品较纯的g-C3N4样品表现出更高的CO和CH4产率,最高分别是纯g-C3N4的1.82倍和2.18倍.表征发现,K、Mn共掺杂g-C3N4复合催化剂的CO2还原性能的提升得益于扩展的可见光利用率和光致载流子的加速分离和转移. |
| 英文摘要: |
| K and Mn-modifed g-C3N4 composites were prepared by one-pot calcining method with urea and KMnO4 as precursor, and applied to photocatalytic CO2 reduction. The systematic characterization results of XRD, FTIR, TEM-EDS, XPS revealed that the K and Mn elements were co-doped into the CN framework successfully to form n-π* conjugate forms and a part of Mn element existed in the form of MnO2. The main products of CO and CH4 were detected by chromatography. The yields of CO and CH4 of K and Mn-modifed g-C3N4 were 4.66 and 0.59 μmol·g-1 respectively, which is 1.82 and 2.18 times higher than that of pure g-C3N4. The improved photocatalytic degradation property of K and Mn-modifed g-C3N4 were mainly benefited from the extended visible light utilization, the accelerated separation and transfer of photo-induced charge carriers. |
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