The facile soft-template-morphology-controlled (STMC) synthesis of ZnIn2S4 nanostructures and their excellent morphology-dependent adsorption properties†,Journal of Materials Chemistry A

当前位置： X-MOL 学术 › J. Mater. Chem. A › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

The facile soft-template-morphology-controlled (STMC) synthesis of ZnIn2S4 nanostructures and their excellent morphology-dependent adsorption properties†
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2019-12-23 , DOI: 10.1039/c9ta11800d
Afaq Ahmad Khan _{1,

2,

3} , Arif Chowdhury _{1,

2,

3} , Sunita Kumari _{1,

2,

3} , Sahid Hussain _{1,

2,

3}

Affiliation

Fabricating nanostructures (NS) with well-developed morphologies and high surface areas is vital to the success of any designed material for its application in adsorption and catalysis. In this study, we prepared ZnIn₂S₄ NS with different morphologies using a soft-template-based precipitation method. X-ray diffraction data show that the NS are crystalline with a hexagonal structure. Field emission scanning electron microscopy suggests that the NS are formed with different morphologies, such as lamellar structures, nanobeads, and nanopetal/nanoflake hybrids. Moreover, transmission electron microscopy confirmed the lamellar structure, which was composed of vertically grown 2D nanosheets. Brunauer–Emmett–Teller analysis indicates the specific surface area (135.36 to 197.63 m² g⁻¹) and pore width (1.41 to 4.54 nm) values of the NS vary with varying soft templates. The obtained NS have efficient adsorption performance towards malachite green dye and dichromate (Cr₂O₇²⁻), with maximum adsorption capacities of 1525 and 313 mg g⁻¹, respectively, which are considerably higher than those of many other previously reported nanoadsorbents. The adsorption process follows the Freundlich isotherm model for the lamellar structure and the Langmuir isotherm model for the other morphologies. All adsorbents conformed to a pseudo-second-order rate kinetics model, and the best adsorbent could be recycled up to five times without significant loss of efficiency.

中文翻译：

ZnIn ₂ S ₄纳米结构的简便的软模板形态控制（STMC）合成及其出色的形态依赖吸附性能†

制造具有良好形态和高表面积的纳米结构（NS）对于任何设计用于吸附和催化的材料的成功都是至关重要的。在这项研究中，我们使用基于软模板的沉淀方法制备了具有不同形态的ZnIn ₂ S ₄ NS。X射线衍射数据表明NS是具有六边形结构的晶体。场发射扫描电子显微镜表明，NS形成了不同的形态，例如层状结构，纳米珠和纳米花瓣/纳米鳞片杂种。此外，透射电子显微镜证实了由垂直生长的二维纳米片组成的层状结构。Brunauer–Emmett–Teller分析表明比表面积（135.36至197.63 mNS的² g^-1）和孔宽度（1.41至4.54 nm）值随软模板的变化而变化。所得的NS对孔雀石绿染料和重铬酸盐（Cr₂ O₇^2-）具有有效的吸附性能，最大吸附容量分别为1525和313 mg g^-1，远高于许多其他先前报道的纳米吸附剂。对于层状结构，吸附过程遵循Freundlich等温模型，对于其他形态，吸附过程遵循Langmuir等温模型。所有吸附剂均符合拟二级速率动力学模型，最佳吸附剂可循环使用五次，而不会明显降低效率。

更新日期：2020-01-07

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11