Nanoparticle photosensitizers possess technical advantages for photocatalytic reactions due to enhanced light harvesting and efficient charge transport. Here we report synthesis of semiconductor nanoparticles through covalent coupling and assembly of metalloporphyrin with condensed carbon nitride. The resultant nanoparticles consist of light harvesting component from the condensed carbon nitride and photocatalytic sites from the metalloporphyrins. This synergetic particle system effectively initiates efficient charge separation and transport and exhibits excellent photocatalytic activity for CO₂ reduction. The CO production rate can reach up to 57 µmol/(gh) with a selectivity of 79% over competing H₂ evolution. Controlled experiments demonstrate that the combination of light harvesting with photocatalytic activity via covalent assembly is crucial for the high photocatalytic activity. Due to effective charge separation and transfer, the resultant nanoparticle photocatalysts show exceptional photo stability against photo-corrosion under light irradiation, enabling for long-term utilization. This research opens a new way for the development of stable, effective nanoparticle photocatalysts using naturally abundant porphyrin pigments.

由于增强的光收集和有效的电荷传输，纳米粒子光敏剂在光催化反应方面具有技术优势。在这里我们报告通过金属卟啉与缩合的氮化碳的共价偶联和组装来合成半导体纳米颗粒。所得的纳米颗粒由来自浓缩的氮化碳的光收集组分和来自金属卟啉的光催化部位组成。该协同粒子系统有效地启动了有效的电荷分离和传输，并展现出出色的光催化活性，可降低CO ₂。与竞争的H _2相比，CO的生产率最高可达57 µmol /（gh），选择性为79％演化。对照实验表明，通过共价组装将光收集与光催化活性相结合对于高光催化活性至关重要。由于有效的电荷分离和转移，所得纳米粒子光催化剂在光照射下显示出优异的光稳定性，可抵抗光腐蚀，从而可以长期使用。该研究为使用天然富卟啉颜料开发稳定，有效的纳米光催化剂开辟了一条新途径。