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A comparative study of dirac 2D materials, TMDCs and 2D insulators with regard to their structures and photocatalytic/sonophotocatalytic behavior
Applied Nanoscience ( IF 3.869 ) Pub Date : 2020-06-10 , DOI: 10.1007/s13204-020-01475-y
A. Raza , U. Qumar , J. Hassan , M. Ikram , A. Ul-Hamid , J. Haider , M. Imran , S. Ali

A new era in the development of advanced functional materials was partly sparked by the discovery of 2D materials. In this respect, graphene is believed to have marked the origin of 2D materials. The ability to fabricate a vast majority of such advanced nanomaterials hinges upon the strength of interplanar interactions realized in their respective bulk counterparts. The present study undertakes the comparative analysis of oft-explored 2D materials such as Dirac 2D materials (GO, rGO), TMDCs (MoS2) and 2D insulators (BN) in the context of their structural, optical, thermal and morphological parameters. Despite implementing several methodologies including a combination of physical, chemical and biological techniques, aquatic and microbial pollution remains a challenge to this day. More recently, nanomaterials have attracted considerable attention as these are believed to hold an extraordinary prospective for utilization toward environmental remediation. Among several probable candidates, 2D materials hold immense appeal due to its useful properties including high absorptivity and large surface area, which enable them to be employed for multifaceted applications. In the present study, a wide range of experimental results extracted from numerous characterization techniques (i.e., XRD, UV–Vis, FTIR, HR-TEM, XPS, DSC-TGA, and Raman) is included. For instance, optical data obtained from these materials point toward a narrow bandgap, while HR-TEM images show large surface area, which suggests that these materials hold promising prospect for use in applications that require strong catalytic activity. Further experimental results indicate that photocatalytic and sonophotocatalytic potential is significantly enhanced by 2D materials. In this respect, rGO showed 60% degradation of synthetic pollutant in 100 min and MoS2 realized 55% degradation during the same duration. The present study suggests that rGO may be used as a superior photocatalyst in wastewater treatment and related environmental applications. Moreover, the sonophotocatalytic behavior exhibited by these materials showed consistently higher efficiency compared to the respective individual processes which is attributed to the formation of larger amounts of electron–hole pairs.



中文翻译:

Dirac 2D材料,TMDC和2D绝缘子的结构和光催化/声光催化行为的比较研究

2D材料的发现在一定程度上激发了先进功能材料开发的新纪元。在这方面,石墨烯被认为是2D材料的起源。制造绝大多数这种先进纳米材料的能力取决于在它们各自的本体中实现的面间相互作用的强度。本研究对常用的2D材料进行比较分析,例如Dirac 2D材料(GO,rGO),TMDC(MoS 2和2D绝缘子(BN)的结构,光学,热学和形态参数。尽管采用了包括物理,化学和生物技术相结合的几种方法,但水和微生物污染仍然是当今的挑战。近来,纳米材料已经引起了相当大的关注,因为它们被认为对于用于环境修复具有非凡的前景。在几种可能的候选材料中,二维材料由于其有用的特性(包括高吸收率和大表面积)而具有巨大的吸引力,这使其可以用于多面应用。在本研究中,包括了从众多表征技术(即XRD,UV-Vis,FTIR,HR-TEM,XPS,DSC-TGA和拉曼)中提取的大量实验结果。例如,从这些材料获得的光学数据指向窄的带隙,而HR-TEM图像显示出较大的表面积,这表明这些材料在需要强催化活性的应用中具有广阔的前景。进一步的实验结果表明,二维材料显着增强了光催化和声光催化的潜力。在这方面,rGO在100 min和MoS中显示60%的合成污染物降解 进一步的实验结果表明,二维材料显着增强了光催化和声光催化的潜力。在这方面,rGO在100 min和MoS中显示60%的合成污染物降解 进一步的实验结果表明,二维材料显着增强了光催化和声光催化的潜力。在这方面,rGO在100 min和MoS中显示60%的合成污染物降解2在相同的时间内实现了55%的降级。本研究表明,rGO可以用作废水处理和相关环境应用中的优良光催化剂。而且,这些材料所表现出的声光催化行为与各个单独的过程相比,始终显示出更高的效率,这归因于形成了大量的电子-空穴对。

更新日期:2020-06-10
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