The photocatalyst-enzyme hybrid systems (PEHSs) provided a promising method for environmental remediation by simultaneously harnessing the power of solar-energy conversion and biocatalysis. However, the use of PEHSs for environmental remediation was restricted by a complicated synthesis and assembly process. This work explored a simple one-pot biomineralization approach to fabricate PEHS. It was found that the cytochrome enzyme could be directly self-assembled onto the biosynthesized CdS during biomineralization by MR-1. More strikingly, those attached cytochrome enzymes could efficiently receive the photoelectrons from the CdS and serve as the photoreduction center which formed a typical PEHS. Impressively, this bio-CdS-cytochrome PEHS exhibited an extremely high photocatalytic decolorization rate of 69.4 mg/g/min, which was the highest record ever reported for procion red H-E3B. This work provided a simple and facile approach for PEHSs fabrication, which would be promising for practical application in environmental remediation.

中文翻译：

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生物矿化诱导光催化剂-酶混合系统的合成和自组装，用于高效环境修复

光催化剂-酶混合系统（PEHS）通过同时利用太阳能转换和生物催化的力量，为环境修复提供了一种有前景的方法。然而，PEHS在环境修复中的应用受到复杂的合成和组装过程的限制。这项工作探索了一种简单的一锅式生物矿化方法来制造 PEHS。研究发现，在MR-1的生物矿化过程中，细胞色素酶可以直接自组装到生物合成的CdS上。更引人注目的是，那些附着的细胞色素酶可以有效地接收来自CdS的光电子，并作为光还原中心，形成典型的PEHS。令人印象深刻的是，这种生物CdS-细胞色素PEHS表现出极高的光催化脱色率，达到69.4 mg/g/min，这是迄今为止报道的Proion Red H-E3B的最高记录。这项工作为 PEHS 的制造提供了一种简单易行的方法，有望在环境修复中实际应用。