Zaman M Burhanuz, Poolla Rajaram, Khandy Shakeel Ahmad, Modi Anchit, Tiwari Rajendra Kumar
School of Studies in Physics, Jiwaji University, Gwalior-474011, India.
Department of Physics, National Taiwan University, Taipei-10617, Taiwan.
Nanotechnology. 2021 Mar 24;32(24). doi: 10.1088/1361-6528/abec09.
We present our work on the rapid hydrothermal synthesis of highly crystalline 2D SnS nanostructures. An innovative idea is used in which thioglycolic acid is the sulfur precursor source. Structural studies indicate the material has grown in a single-phase orthorhombic structure. The single-phase formation of the material is also confirmed from the rietveld refinement of the experimental XRD data and by raman spectroscopic analysis. Morphological studies show the formation of 2D sheets having thickness in the nanoscale (100-150 nm) dimensions. Optical absorbance studies show the material is visible-light active exhibiting an indirect bandgap of 1.1 eV and direct band gap ∼1.7 eV. Density functional theory calculations support the experimental bandgap results. Photocatalytic activity of the nanosheets was investigated against methylene blue (MB), rhodamine B (RhB) and methyl orange (MO) dyes employing a solar simulator as the source of photons (light source). The nanosheets were found to photodegrade 80% of MB, 77% of RhB and 60% of MO in 120 min of light illumination. Reusability and post catalytic properties affirm the durability and stability of the nanosheets, which is very important in the context of waste water treatment considering the toxic nature of the effluents from dye industries.
我们展示了关于快速水热合成高结晶度二维SnS纳米结构的工作。采用了一种创新理念，其中硫代乙醇酸作为硫前驱体源。结构研究表明该材料以单相正交结构生长。通过对实验XRD数据的rietveld精修以及拉曼光谱分析，也证实了该材料的单相形成。形态学研究表明形成了厚度在纳米级（100 - 150纳米）尺寸的二维薄片。光吸收研究表明该材料具有可见光活性，其间接带隙为1.1 eV，直接带隙约为1.7 eV。密度泛函理论计算支持了实验带隙结果。使用太阳能模拟器作为光子（光源）源，研究了纳米片对亚甲基蓝（MB）、罗丹明B（RhB）和甲基橙（MO）染料的光催化活性。在光照120分钟后，发现纳米片可光降解80%的MB、77%的RhB和60%的MO。可重复使用性和催化后性能证实了纳米片的耐久性和稳定性，考虑到染料工业废水的毒性，这在废水处理方面非常重要。
