Wang Lijing, Hu Youyou, Qi Fei, Ding Lei, Wang Junmei, Zhang Xueyu, Liu Qianwen, Liu Lizhe, Sun Haizhu, Qu Peng
Henan Engineering Center of New Energy Battery Materials, Henan D&A Engineering Center of Advanced Battery Materials, College of Chemistry and Chemical Engineering , Shangqiu Normal University , Shangqiu 476000 , People's Republic of China.
Department of Physics, College of Science , Jiangsu University of Science and Technology , Zhenjiang 212003 , People's Republic of China.
ACS Appl Mater Interfaces. 2020 Feb 19;12(7):8157-8167. doi: 10.1021/acsami.9b19408. Epub 2020 Feb 10.
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, the complex preparation process, poor stability, and rapid carrier recombination restrict their successful application in photocatalysis. Herein, the above problems are resolved by preparing BP NPs through a facile sonication-assisted hydrothermal method. To further improve the stability and photocatalytic activity, BP NPs are tightly anchored onto ZnS to prepare ZnS-BP porous nanosheets. With the Zn-P coordination bond built between them, higher stability, enhanced carrier transport ability, and excellent hydrogen adsorption and desorption equilibrium of photocatalysts are achieved. An efficient and recyclable photocatalytic hydrogen evolution rate of 1561 μmol h g is obtained under visible-light irradiation, which is superior to that of previously reported BP-based photocatalysts. Besides, the photocatalytic mechanism is investigated based on the theoretical calculations and experimental characterizations. The charge transfer dynamics are studied by surface photovoltage (SPV), ultrafast transient absorption (TA), X-ray absorption spectra (XAS), electrochemical impedance spectroscopy (EIS), and steady-state photoluminescence (PL) spectra. This work set a reference for the design of high-performance BP-related nanomaterials in solar energy storage and conversion.
黑磷纳米颗粒（BP NPs）由于具有丰富的表面活性位点、极高的载流子迁移率和强烈的可见-近红外光响应，在光催化方面具有很大优势。然而，复杂的制备过程、较差的稳定性以及快速的载流子复合限制了它们在光催化中的成功应用。在此，通过简便的超声辅助水热法制备BP NPs解决了上述问题。为了进一步提高稳定性和光催化活性，将BP NPs紧密锚定在ZnS上以制备ZnS-BP多孔纳米片。通过在它们之间构建Zn-P配位键，实现了更高的稳定性、增强的载流子传输能力以及光催化剂优异的氢吸附和解吸平衡。在可见光照射下获得了1561 μmol h g的高效且可循环的光催化析氢速率，这优于先前报道的基于BP的光催化剂。此外，基于理论计算和实验表征研究了光催化机理。通过表面光电压（SPV）、超快瞬态吸收（TA）、X射线吸收光谱（XAS）、电化学阻抗谱（EIS）和稳态光致发光（PL）光谱研究了电荷转移动力学。这项工作为太阳能存储和转换中高性能BP相关纳米材料的设计提供了参考。
