Grinding-assisted heterogeneous nucleation of BiOAc on MoS2 nanoflowers to heterojunction with good visible-light photocatalytic performance

• 作者: Huanzhen Liu Qiaofeng Han Xuemei Jia Zichen Shen
• 来源期刊: 颗粒学报（英文版）
• 年，卷（期）: 2021,（3）
• 页码范围: 132-141
• 页数: 10页
• 语种: 英文

摘要

Bismuth oxide subacetate(CH3COO(BiO);BiOAc)with a large band gap energy(Eg)was first applied as an ultraviolet-light-driven photocatalyst in our group.MoS2 nanoflowers have been used to improve the visible-light photocatalytic activity of bismuth-based semiconductors with wide Eg because of their good visible-light response.Herein,the grinding-assisted solid-state reaction method was used to pre-pare a MoS2/BiOAc composite to improve the visible-light photoreactivity of BiOAc.As compared with commonly used wet chemical and hydrothermal routes,the grinding-assisted synthesis facilitated het-erogeneous nucleation,which was beneficial to achieving close contact and subsequent charge transfer and separation at the interfaces,resulting in enhanced photocatalytic activity for malachite green,methy-lene blue,and antibiotic tetracycline degradation under visible-light irradiation.Notably,the dispersion in the mixing solution of ethanol and water(v/v=1)of MoS2 nanosheets induced self-assembly into flower-like nanostructures,thus enhancing the photocatalytic activity of MoS2/BiOAc.A possible mechanism for visible-light photocatalysis of MoS2/BiOAc was proposed.