Amiri Zahra, Banna Motejadded Emrooz Hosein, Safarzadeh Khosrowshahi Mobin
Nanotechnology Department, School of Advanced Technologies, Iran University of Science and Technology (IUST), Narmak, Tehran, 16846, Iran.
Sci Rep. 2025 Jul 1;15(1):22086. doi: 10.1038/s41598-025-08920-4.
This study investigated a one-step green pyrolysis method inspired by chemical vapor deposition, utilizing melamine and zinc nitrate precursors with varying sulfur content for degradation and adsorption of tetracycline. The method effectively synthesized a ZnS/MoS heterojunction composite supported on a porous carbon substrate. It takes advantage of the gases (such as CO, CO, and HO) naturally released during pyrolysis to serve as internal activating agents. In contrast to traditional techniques that rely on inert atmospheres, chemical additives, or complicated high-temperature setups, this method minimizes both the ecological footprint and procedural complexity. The optimal composite, PCS2 (synthesized with 2 g of sulfur), exhibited the lowest band gap of 2.91 eV and the highest specific surface area of 216.83 m g, making it the most effective among the tested samples. This composite achieved 55% adsorption of pollutants and demonstrated a total removal efficiency of 81% for tetracycline. The addition of scavengers revealed that the primary active species in the reaction were holes. This synthesized method shows great promise for preparing heterojunction structures, making it highly suitable for removing organic pollutants from contaminated water.
本研究探究了一种受化学气相沉积启发的一步式绿色热解方法，该方法利用含不同硫含量的三聚氰胺和硝酸锌前驱体来降解和吸附四环素。该方法有效地合成了一种负载在多孔碳基底上的ZnS/MoS异质结复合材料。它利用热解过程中自然释放的气体（如CO、CO和HO）作为内部活化剂。与依赖惰性气氛、化学添加剂或复杂高温装置的传统技术相比，该方法将生态足迹和程序复杂性降至最低。最佳复合材料PCS2（用2 g硫合成）表现出最低的带隙2.91 eV和最高的比表面积216.83 m g，使其成为测试样品中最有效的材料。该复合材料实现了55%的污染物吸附，并证明对四环素的总去除效率为81%。清除剂的添加表明反应中的主要活性物种是空穴。这种合成方法在制备异质结结构方面显示出巨大的潜力，使其非常适合从受污染的水中去除有机污染物。
