Abstract The present article reports the hydrothermal synthesis of quaternary Cu2MnSnS4 (CMTS) nanostructures under subcritical reaction conditions. The effect of different chalcogen (sulfur) precursor sources ( l -cysteine, elemental sulfur and sodium sulfide) on the growth and properties of the nanostructures is studied. The sulfur precursors showed prominent influence on the structural and morphological properties of the nanostructures. Structural properties indicated the growth of single phase crystalline materials. The crystal phase was controlled and determined by the reactivity of the sulfur sources. Metastable wurtzite phase was achieved with the mildly reactive precursor while tetragonal phase was obtained in the case of highly reactive precursors. Morphological studies showed formation of nanoflakes and anisotropic two-dimensional irregular nanostructures. Surface area analysis indicated that the nanoflakes are mesoporous in nature and exhibited a high specific surface area of 32.24 m2/g. The electrical studies demonstrated p-type conductivity of the material. Optical properties revealed optimum energy band gap value (~1.7 eV) of the nanostructures, suitable for the solar energy conversion applications. The magnetic properties indicated ferromagnetic behavior of the CMTS nanoflakes. The nanostructures were investigated as catalysts for photocatalytic decolaration of malachite green (MG) dye under UV–Visible light illumination. The nanoflakes showed good activity against the dye and photodegraded 95% of the dye in an illumination duration of 140 min. The photocatalysts exhibited good stability during the photocatalytic processes.

中文翻译：

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水热合成四方和纤锌矿 Cu2MnSnS4 纳米结构的多种应用：不同硫反应物对生长和性能的影响

摘要 本文报道了在亚临界反应条件下水热合成四元 Cu2MnSnS4 (CMTS) 纳米结构。研究了不同硫属元素（硫）前体来源（l-半胱氨酸、元素硫和硫化钠）对纳米结构生长和性质的影响。硫前体对纳米结构的结构和形态特性有显着影响。结构特性表明单相晶体材料的生长。晶相由硫源的反应性控制和确定。亚稳纤锌矿相是用温和反应性的前体获得的，而在高反应性前体的情况下获得四方相。形态学研究表明形成了纳米薄片和各向异性二维不规则纳米结构。表面积分析表明，纳米薄片本质上是中孔的，并表现出 32.24 m2/g 的高比表面积。电学研究证明了该材料的 p 型导电性。光学特性揭示了纳米结构的最佳能带隙值（~1.7 eV），适用于太阳能转换应用。磁性表明 CMTS 纳米薄片的铁磁行为。研究了纳米结构作为在紫外-可见光照射下孔雀石绿 (MG) 染料光催化脱光的催化剂。纳米薄片对染料显示出良好的活性，并在 140 分钟的光照持续时间内光降解 95% 的染料。