Abstract Environmental-friendly photocatalysts and high utilization of solar energy have attracted much attention; hence, it is important to develop highly efficient and non-toxic photocatalysts. As a novel two-dimensional semiconductor, black phosphorus nanosheets (BPNs) have gotten extensive solicitude due to their tunable bandgap and high carrier mobility. Here, we report a new kind of environmental-friendly nanocomposite consisting of ZnAl-layered double hydroxides (LDH) and BPNs, and is obtained by electrostatic self-assembly method. The acquired photocatalysts were studied by XRD, TEM, EDX, UV–Vis diffuse reflectance spectra, mott-schottky, EIS and ESR techniques so as to gain the information on morphology, structure and properties. Compared to pristine ZnAl-LDH and BPNs, the composite photocatalyst shows the best photocatalytic activity for methylene blue (MB) degradation under visible light irradiation, and the 99% of MB was degraded in 80 min. The improvement of photocatalytic performance is mainly because BPNs provide an additional transfer channel of electrons and holes. The nanocomposites have opened up a new idea to construct black phosphorus (BP) based photocatalysts for environmental remediation.

中文翻译：

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黑磷纳米片和ZnAl-LDH纳米复合材料作为环境友好型光催化剂在可见光下降解亚甲蓝

摘要 环境友好型光催化剂和太阳能的高利用率备受关注；因此，开发高效、无毒的光催化剂非常重要。作为一种新型的二维半导体，黑磷纳米片（BPNs）由于其带隙可调和载流子迁移率高而受到广泛关注。在这里，我们报告了一种由 ZnAl 层状双氢氧化物 (LDH) 和 BPNs 组成的新型环保纳米复合材料，并通过静电自组装方法获得。通过XRD、TEM、EDX、UV-Vis漫反射光谱、莫特-肖特基、EIS和ESR技术研究获得的光催化剂，以获得形态、结构和性质的信息。与原始的 ZnAl-LDH 和 BPNs 相比，该复合光催化剂在可见光照射下对亚甲蓝(MB)降解表现出最佳的光催化活性，80 min内降解了99%的亚甲蓝(MB)。光催化性能的提高主要是因为 BPNs 提供了额外的电子和空穴传输通道。纳米复合材料为构建基于黑磷（BP）的环境修复光催化剂开辟了新思路。