Centre for Incubation, Innovation, Research and Consultancy (CIIRC) and Department of Chemistry, Jyothy Institute of Technology, Tataguni, Off Kanakapura Road, Bangalore, 560082, Karnataka, India; Department of Chemistry, PES University, 100 Ft. Ring Road, BSK 3rd Stage, Bangalore, 560085, Karnataka, India.
Centre for Incubation, Innovation, Research and Consultancy (CIIRC) and Department of Chemistry, Jyothy Institute of Technology, Tataguni, Off Kanakapura Road, Bangalore, 560082, Karnataka, India; Visvesvaraya Technological University, Jnana Sangama, Belgaum, 590018, Karnataka, India.
Chemosphere. 2022 Jan;287(Pt 2):132174. doi: 10.1016/j.chemosphere.2021.132174. Epub 2021 Sep 14.
Removal of the hazardous and endocrine-disrupting 2,4-dichlorophenol (2,4-DCP) from water bodies is crucial to maintain the sanctity of the ecosystem. As a low bandgap material (1.37 eV), NaBiS was hydrothermally prepared and used as a potential photocatalyst to degrade 2,4-DCP under visible light irradiation. NaBiS appeared to be highly stable and remained structurally undeterred despite thermal variations. With a surface area of 6.69 m/g, NaBiS has enough surface-active sites to adsorb the reactive molecules and exhibit a significant photocatalytic activity. In alkaline pH, the adsorption of 2,4-DCP on NaBiS appeared to decrease whereas, the acidic and neutral environments favoured the degradation. An increase in the photocatalyst dosage enhanced the degradation efficiency from 81 to 86 %, because of higher vacant adsorbent sites and the electrostatic attraction between NaBiS and 2,4-DCP. The dominant scavengers degraded 2,4-DCP by forming a coordination bond between chlorine's lone pair of electrons and the vacant orbitals of bismuth, following the order hole> OH > singlet oxygen. Being non-toxic to both natural and aquatic systems, NaBiS exhibits antifungal properties at higher concentrations. Finally, the electron-rich NaBiS is an excellent electrocatalyst that effectively degrades organic pollutants and is a promising material for industrial and environmental applications.
从水体中去除有害物质和内分泌干扰物 2,4-二氯苯酚（2,4-DCP）对于维护生态系统的神圣性至关重要。作为一种低带隙材料（1.37 eV），NaBiS 被水热法制备，并被用作一种潜在的光催化剂，在可见光照射下降解 2,4-DCP。NaBiS 表现出高度的稳定性，尽管经历了热变化，但结构仍然没有受到影响。NaBiS 的比表面积为 6.69 m/g，有足够的表面活性位点来吸附反应分子，并表现出显著的光催化活性。在碱性 pH 下，2,4-DCP 在 NaBiS 上的吸附似乎减少了，而在酸性和中性环境中则有利于降解。增加光催化剂用量可将降解效率从 81%提高到 86%，这是因为有更多的空吸附剂位点和 NaBiS 与 2,4-DCP 之间的静电吸引。主要的清除剂通过氯的孤对电子与铋的空轨道之间形成配位键来降解 2,4-DCP，其顺序为空穴>OH>单线态氧。由于对自然和水生系统都无毒，NaBiS 在较高浓度下表现出抗真菌特性。最后，富电子的 NaBiS 是一种优良的电催化剂，可有效降解有机污染物，是工业和环境应用的有前途的材料。
