It remains a challenge to achieve overall photocatalytic conversion of CO with HO into tunable syngas and O. Herein, by inserting BiVO into the heterointerface of hollow core-shell CdS@T-COF S-scheme photocatalyst, an innovative CdS/BiVO@T-COF dual S-scheme heterojunction is developed, which gives an almost stoichiometric evolution of syngas (453.6 μmol g h) and O (230.5 μmol g h). Moreover, the CO output and selectivity only decline by around 20% when pure CO is replaced by diluted CO (15%) atmosphere. The BiVO embedding not only augments the internal electric field and band bending, upgrading the separation efficiency of active carriers, but also alters the roles of the components involved, separating the occurrence of CO, O and H evolution on T-COF, BiVO and CdS in lower energy barriers. Besides, varying the T-COF thickness can modulate the availability of CO, HO and photon to different sites, thereby adjusting the CO/H ratio in a wide window. This work opens an avenue for customizing three-in-one artificial photosynthetic systems for coupling three half reactions.

中文翻译：

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将 CO2 还原、H2O 氧化和 H2 析出催化剂集成到双 S 方案人工光合系统中，用于可调合成气生产

实现CO与H2O的整体光催化转化为可调合成气和O仍​​然是一个挑战。本文中，通过将BiVO插入空心核壳CdS@T-COF S型光催化剂的异质界面中，一种创新的CdS/BiVO@T- COF 双 S 型异质结的开发，使合成气 (453.6 μmol gh) 和 O (230.5 μmol gh) 几乎达到化学计量演化。此外，当纯CO被稀释的CO（15%）气氛替代时，CO输出和选择性仅下降20%左右。 BiVO嵌入不仅增强了内部电场和能带弯曲，提高了活性载流子的分离效率，而且改变了相关组分的作用，分离了T-COF、BiVO和CdS上CO、O和H演化的发生在较低的能量壁垒。此外，改变T-COF厚度可以调节CO、H2O和光子到不同位点的可用性，从而在宽窗口内调整CO/H比率。这项工作为定制三合一人工光合系统以耦合三个半反应开辟了一条途径。