Photocatalytic CO₂ reduction for solar fuel generation and photocatalytic sterilization are highly desired green routes for sustainable environmental purification. Herein, a bifunctional self-standing nanosheet array of Z-scheme structured inorganic–organic heterojunction is synthesized via in-situ growth of ZnIn₂S₄ (ZIS) on carbon cloth (CC) followed by self-assembly with cobalt porphyrin (meso-tetra(4-sulfonatophenyl) porphyrin, CoTPPS). The obtained CC-ZIS-CoTPPS performed well in the photocatalytic CO₂ reduction and antibacterial processes simultaneously in a portable photocatalytic system with a negligible amount of solution. Specifically, the optimized CC-ZIS-CoTPPS demonstrates more than 140 times enhanced CO evolution than pristine CoTPPS. Experimental and theoretical results imply that the enhanced photocatalytic CO₂ reduction is associated with elevated light absorption, promoted charge separation, and improved CO₂ activation in the inorganic–organic Z-scheme heterojunction. In addition, the self-standing nanosheet array possesses a mechanical cutting effect, which can kill bacteria adhering to the surface even in dark conditions. Moreover, CC-ZIS-CoTPPS achieved a 100 % killing rate under visible light irradiation by synergistically chemical and mechanical sterilization. Furthermore, CC-ZIS-CoTPPS exhibits efficient bifunctional photocatalytic photocatalytic CO₂ reduction coupled with in-situ sterilization. This work presents an atomic perspective for developing innovative bifunctional photocatalysts, which hold great potential in portable devices to alleviate energy and environmental crises.

中文翻译：

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ZnIn2S4/钴卟啉磺酸盐的自立式 Z 型结构异质纳米片阵列用于双功能光催化二氧化碳还原和抗菌


用于太阳能燃料生产的光催化 CO₂ 还原和光催化灭菌是可持续环境净化的非常理想的绿色途径。在此，通过在碳布 （CC） 上原位生长 ZnIn₂S₄ （ZIS），然后与钴卟啉（内消旋四（4-磺酰苯）卟啉，CoTPPS）自组装，合成了 Z 型结构无机-有机异质结的双功能自立式纳米片阵列。获得的 CC-ZIS-CoTPPS 在便携式光催化系统中同时在光催化 CO₂ 还原和抗菌过程中表现良好，溶液量可忽略不计。具体来说，优化的 CC-ZIS-CoTPPS 的 CO 析出能力是原始 CoTPPS 的 140 倍以上。实验和理论结果表明，增强的光催化 CO₂ 还原与无机-有机 Z 型异质结中光吸收增加、电荷分离促进和 CO₂ 活化改善有关。此外，自立式纳米片阵列具有机械切割效果，即使在黑暗条件下也能杀死粘附在表面的细菌。此外，CC-ZIS-CoTPPS 通过化学和机械协同灭菌，在可见光照射下实现了 100% 的杀灭率。此外，CC-ZIS-CoTPPS 表现出高效的双功能光催化光催化 CO₂ 还原与原位灭菌耦合。这项工作为开发创新的双功能光催化剂提供了原子视角，这些光催化剂在便携式设备中具有缓解能源和环境危机的巨大潜力。