2E3 (E=S, Se, and Te) hierarchitectures: The case of Bi2S3 with superior visible-light-driven Cr(VI) photoreduction capacity]]>

摘要

Graphical abstract Bi2S3 hierarchitectures were fabricated by a ionic-assisted microwave-ultrasonic combined synthetic strategy and exhibited superior Cr(VI) photoreduction capacity in real industrial wastewater under visible light irradiation. Display Omitted Highlights ? Bi2S3 hierarchical nanostructures (HNs) were fabricated by a combined synthetic strategy. ? A topotactic transformation from BiOCl microsphere to Bi2S3 HNs was proposed. ? Bi2S3 HNs displayed superior visible-light-driven Cr(VI) photoreduction capacity. ? Bi2S3 HNs were used for Cr(VI) removal in actual electroplating and tannery wastewater. Abstract A general ionic-assisted microwave-ultrasonic combined synthetic strategy was developed to fabricate Bi2E3 (E=S, Se, and Te) hierarchitectures. To understand the crystal phase transformation and morphological evolution of Bi2S3 hierarchical nanostructures, the fabrication of Bi2S3 hierarchitectures was investigated by varying sulfidation time and chlorination time. A topotactic transformation from BiOCl microsphere to Bi2S3 hierarchitectures was proposed. It was found that the structure, size, and morphology of Bi2S3 hierarchitectures could be delicately engineered by varying chlorination time, alkyl chain length, and concentration of ionic liquid. Moreover, the as-prepared Bi2S3 hierarchitectures displayed superior capacity of Cr(VI) photored