Anchoring Black Phosphorus Nanoparticles onto ZnS Porous Nanosheets: Efficient Photocatalyst Design and Charge Carrier Dynamics

• DOI: 10.1021/acsami.9b19408
• Publication Date: 2020-01-28T14:58:26Z
• Authors: Lijing Wang; Youyou Hu; Fei Qi; Lei Ding; Junmei Wang; Xueyu Zhang; Qianwen Liu; Lizhe Liu; Haizhu Sun; Peng Qu
• Keywords: Black Phosphorus; Charge carrier; Anchoring

Black phosphorus nanoparticles (BP NPs) possess great advantages in photocatalysis owing to the rich surface active sites, extremely high carrier mobility, and strong visible–near-infrared light response. However, complex preparation process, poor stability, rapid recombination restrict their successful application photocatalysis. Herein, above problems are resolved by preparing BP NPs through a facile sonication-assisted hydrothermal method. To further improve stability photocatalytic activity, tightly anchored onto ZnS prepare ZnS–BP porous nanosheets. With Zn–P coordination bond built between them, higher enhanced transport ability, excellent hydrogen adsorption desorption equilibrium of photocatalysts achieved. An efficient recyclable evolution rate 1561 μmol h–1 g–1 is obtained under visible-light irradiation, which superior that previously reported BP-based photocatalysts. Besides, mechanism investigated based on theoretical calculations experimental characterizations. The charge transfer dynamics studied photovoltage (SPV), ultrafast transient absorption (TA), X-ray spectra (XAS), electrochemical impedance spectroscopy (EIS), steady-state photoluminescence (PL) spectra. This work set reference for design high-performance BP-related nanomaterials solar energy storage conversion.