Here, we demonstrate the selective cellobiose (building block of cellulose) photoreforming for gluconic acid and syngas co-production in acidic conditions by rationally designing a bifunctional polymeric carbon nitride (CN) with potassium/sulfur co-dopant. This heteroatomic doped CN photocatalyst possesses enhanced visible light absorption, higher charge separation efficiency than pristine CN. Under acidic conditions, cellobiose is not only more efficiently hydrolyzed into glucose but also promotes the syngas and gluconic acid production. Density functional theory (DFT) calculations reveal the favorable generation of •O during the photocatalytic reaction, which is essential for gluconic acid production. Consequently, the fine-designed photocatalyst presents excellent cellobiose conversion (>80%) and gluconic acid selectivity (>70%) together with the co-production of syngas (∼56 μmol g h) under light illumination. The current work demonstrates the feasibility of biomass photoreforming with value-added chemicals and syngas co-production under mild condition.

中文翻译：

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用于在酸性条件下同时生产葡萄糖酸和合成气的选择性纤维二糖光重整

在这里，我们通过合理设计具有钾/硫共掺杂剂的双功能聚合氮化碳（CN），展示了在酸性条件下选择性纤维二糖（纤维素的组成部分）光重整用于葡萄糖酸和合成气联产。这种杂原子掺杂的CN光催化剂比原始CN具有增强的可见光吸收和更高的电荷分离效率。在酸性条件下，纤维二糖不仅更有效地水解成葡萄糖，而且促进合成气和葡萄糖酸的产生。密度泛函理论（DFT）计算揭示了光催化反应期间有利于生成·O，这对于葡萄糖酸的生产至关重要。因此，精心设计的光催化剂呈现出优异的纤维二糖转化率（>80%）和葡萄糖酸选择性（>70%），并在光照下联产合成气（∼56 μmol gh）。目前的工作证明了在温和条件下生物质光重整与增值化学品和合成气联产的可行性。