Hydrophilic calix[4]arene dye-sensitized Co/g-C3N4 composites with Co single atoms for enhanced visible-light-driven photocatalysis
Hydrophilic calix[4]arene dye-sensitized Co/g-C3N4 composites with Co single atoms for enhanced visible-light-driven photocatalysis
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DOI：
10.1016/j.dyepig.2023.111728
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发表时间：
2023-09
影响因子：
4.5
通讯作者：
Chao-Ping Hou;Xin-Ao Li;Jian-feng Huang;Jun-Min Liu
中科院分区：
文献类型：
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作者：
Chao-Ping Hou;Xin-Ao Li;Jian-feng Huang;Jun-Min Liu
采用简单的溶液浸渍法制备了由亲水杯芳烃染料(C4EOP)和单分散钴原子的石墨相亚硝酸碳(Co/g-C3N4)组成的单原子杂化光催化剂(Co/g-C3N4/C4EOP)，并在可见光驱动水中析氢和CO2转化的情况下评价了它们的光催化性能。优化后的Co/g-C3N4/C4EOP(1.0wt%)催化剂在可见光下表现出中等的产氢活性(511molμg−1h−1)和良好的60h内的稳定性(TONC4EOP值为2255)。在相同条件下，Co/g-C3N4/C4BTP(1.0%)和Co/g-C3N4/M-EOP(1.0%)的催化活性明显低于Co/g-C3N4/C4EOP(1.0%)。这可能是由于C4EOP的摩尔消光系数和亲水性高于含有疏水烷基的C4BTP和具有单一D-π-A链的M-EOP所致。此外，Co/g-C3N4/C4EOP(1.0wt%)催化剂对CO2还原为CO表现出高选择性的光催化活性。本工作为开发基于g-C3N4和非贵金属的高效染料敏化光催化体系用于太阳能的化学利用提供了一个有前途的范例。
Single-atom hybrid photocatalysts (Co/g-C3N4/C4EOP) composed of hydrophilic calixarene dyes (C4EOP) and graphite-phase carbon nitrite with monodispersed Co atoms (Co/g-C3N4) are prepared by a facile solution impregnation method, and their photocatalytic performances are evaluated in visible light-driven H2evolution from water and CO2conversion. The optimized Co/g-C3N4/C4EOP (1.0 wt%) catalyst exhibits moderate H2production activity (511 μmol g−1h−1) and good durability within 60 h (TONC4EOPvalue of 2255) under visible light. In contrast, the Co/g-C3N4/C4BTP (1.0 wt%) and Co/g-C3N4/M-EOP (1.0 wt%) show much lower activities than Co/g-C3N4/C4EOP (1.0 wt%) under the same conditions. This could be attributed to the higher molar extinction coefficient and better hydrophilicity of C4EOP compared to C4BTP with hydrophobic alkane groups and M-EOP with single D-π-A chain. In addition, Co/g-C3N4/C4EOP (1.0 wt%) catalyst displays highly selective photocatalytic activity for CO2reduction to CO. This work provides a promising example for the development of efficient dye-sensitized photocatalytic system based on g-C3N4with non-noble metal for the chemical utilization of solar energy.