TY - JOUR
T1 - Solar-Driven Upcycling of Polylactic Acid to Alanine over Pt/CdS-TiO2 Heterojunction Single-Atom Photocatalyst
AU - Xia, Zhanghui
AU - Lin, Longfei
AU - Chen, Xiao
AU - Zhai, Jianxin
AU - Xue, Cheng
AU - Jia, Shuaiqiang
AU - Jiao, Jiapeng
AU - Dong, Mengke
AU - Han, Wanying
AU - Zheng, Xinrui
AU - Deng, Ting
AU - Zou, Xinyu
AU - Xian, Chensheng
AU - Wu, Haihong
AU - Han, Buxing
PY - 2025/12/10
Y1 - 2025/12/10
N2 - The application of solar photocatalysis under mild conditions offers a promising approach to mitigating plastic pollution. In this study, a Pt single-atom catalyst (Pt SAs) supported on a CdS-TiO2 heterojunction (CTA) was synthesized to enable the efficient one-pot conversion of polylactic acid (PLA) into the high-value chemical alanine via integrated depolymerization, oxidation, ammonification, and reduction reactions. The Pt SAs-CTA catalyst achieved an outstanding alanine production rate of 12.1 mmol gcat-1 h-1. Structural and optical characterizations, along with theoretical calculations, reveal that a two-channel electron transfer mechanism (TCETM) synergistically promotes charge separation and transport while suppressing electron-hole recombination, thereby enhancing the redox capability of the photocatalyst. Moreover, Pt SAs-CTA also exhibits excellent performance in the conversion of commercial-grade PLA under solar-simulated irradiation. This work elucidates the atomic-level charge dynamics of Pt single atoms in heterojunction photocatalysis and offers a viable strategy for upcycling plastic waste into value-added chemicals.
AB - The application of solar photocatalysis under mild conditions offers a promising approach to mitigating plastic pollution. In this study, a Pt single-atom catalyst (Pt SAs) supported on a CdS-TiO2 heterojunction (CTA) was synthesized to enable the efficient one-pot conversion of polylactic acid (PLA) into the high-value chemical alanine via integrated depolymerization, oxidation, ammonification, and reduction reactions. The Pt SAs-CTA catalyst achieved an outstanding alanine production rate of 12.1 mmol gcat-1 h-1. Structural and optical characterizations, along with theoretical calculations, reveal that a two-channel electron transfer mechanism (TCETM) synergistically promotes charge separation and transport while suppressing electron-hole recombination, thereby enhancing the redox capability of the photocatalyst. Moreover, Pt SAs-CTA also exhibits excellent performance in the conversion of commercial-grade PLA under solar-simulated irradiation. This work elucidates the atomic-level charge dynamics of Pt single atoms in heterojunction photocatalysis and offers a viable strategy for upcycling plastic waste into value-added chemicals.
UR - https://www.scopus.com/pages/publications/105024735288
U2 - 10.1021/jacs.5c15434
DO - 10.1021/jacs.5c15434
M3 - 文章
C2 - 41270234
AN - SCOPUS:105024735288
SN - 0002-7863
VL - 147
SP - 45357
EP - 45365
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 49
ER -