ABSTRACT Photocatalytic reduction of CO 2 is an effective strategy for addressing greenhouse gases, and exploring highly efficient photocatalysts is key to this research. This work successfully synthesized CdS‐T‐3 material featuring a high‐density twin distribution. Under the influence of the twin structure, CdS‐T not only enhanced photocatalytic performance but also synergistically improved the selectivity of multiple carbon products. The CO yield of CdS‐T‐3 (371.804 µmol·g −1 ·h −1 ) was 1.891 times and 1.398 times that of CdS‐T‐1 and CdS‐T‐5, respectively. Simultaneously, the C 2 H 4 yield of CdS‐T‐3 (195.988 µmol·g −1 ·h −1 ) was 5.385 and 3.043 times that of CdS‐T‐1 and CdS‐T‐5, respectively. This is attributed to the self‐generated electric field at the twin interfaces, which not only effectively promotes electron transfer but also significantly suppresses electron–hole recombination. Consequently, electrons are efficiently utilized during the reduction process, enhancing photocatalytic CO 2 reduction performance. More importantly, the influence of twinning becomes more pronounced with increasing twinning density. This study analyzes the performance impact of twinning structures in photocatalytic CO 2 reduction from two perspectives: charge transfer behavior at twinning interfaces and twinning density regulation, while exploring its underlying mechanisms.
Liu et al. (Mon,) studied this question.