Polyvinylidene Fluoride-networked Sb2S3/CdS/Ag2S Membrane with Dual-junction Exciton Dynamics for In-depth Purification of Textile Printing/Dyeing Wastewater.

Abstract

The textile printing/dyeing (TPD) wastewater poses a serious threat to ecological safety, and it is essential and challenging to alleviate this environmental issue. The sunlight-driven catalysis technology is a promising strategy for wastewater purification. However, the photostability and recyclability of highly active photocatalysts are the main factors limiting its application in wastewater treatment. Herein, a double-shell Sb₂S₃/CdS/Ag₂S (SCA) ternary nanorods with type-II and type-I exciton dynamics was constructed to prepare the polyvinylidene fluoride networked hybrid membrane (PVDF/SCA). Due to the synergistically interacted multi-phase interfaces and superior recyclability, this hybrid membrane exhibited excellent piezo-photocatalytic in-depth purification ability of industrial discharged TPD wastewater under the collaborative drives of ultrasonic mechanical energy and light energy following by a durably stable catalytic performance, surpassing most reported environmental photocatalysts. This study proposes a feasible strategy for in-depth treatment of industrial discharged TPD wastewater to acceptable levels for discharge.