LAUSR

The development of low cost, metal free semiconductor photocatalysts for CO2 reduction to fuels and valuable chemical feedstocks is a practically imperative for reducing anthropogenic CO2 emissions. In this work, black phosphorus quantum dots (BPQDs) were successfully dispersed on a graphitic carbon nitride (g-C3N4) support via a simple electrostatic attraction approach, and the activities of BP@g-C3N4 composites were evaluated for photocatalytic CO2 reduction. The BP@g-C3N4 composites displayed improved carrier separation efficiency and higher activities for photocatalytic CO2 reduction to CO (6.54 μmol g−1 h−1 at the optimum BPQDs loading of 1 wt%) compared with pure g-C3N4 (2.65 μmol g−1 h−1). This work thus identifies a novel approach towards metal free photocatalysts for CO2 photoreduction.摘要开发还原二氧化碳生成燃料和有价值化学品的低成本、非金属半导体光催化剂, 是减少二氧化碳浓度的一种有效方案. 本工作通 过简单的静电吸引方法成功地将黑磷量子点(BPQDs)分散在石墨相氮化碳(g-C3N4)载体上, 成功制备了BP@g-C3N4复合材料, 并对其在紫 外-可见光激发下光催化还原CO2的性能进行了研究. 电化学表征, 瞬态吸收光谱和荧光光谱数据表明BPQDs的负载提高了g-C3N4的载流 子分离效率. 在氙灯的照射下, 与g-C3N4(CO的生成速率为2.1 μmol g−1 h−1)相比, BP@g-C3N4复合材料光催化还原CO2活性显著提高(当 BPQDs的负载量为1 wt%时, CO的生成速率为6.54 μmol g−1 h−1). 本工作发展了一种新型的可还原CO2的非金属基光催化剂.