Arunpandian Muthuraj, Oh Tae Hwan
School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan 38541, Republic of Korea.
Molecules. 2025 May 7;30(9):2081. doi: 10.3390/molecules30092081.
Advanced photocatalytic materials for environmental cleanup need to be developed in response to growing concerns about water pollution. This paper presents a novel N-doped hollow carbon spheres (NHCSs)-supported CoSnO/WS heterostructure synthesized using a hydrothermal approach and examined using various characterization techniques to evaluate the crystal structures, functional groups, surface morphology, chemical properties, and optical characteristics. The photocatalytic performance of the CoSnO/WS@NHCSs composite was assessed by degrading Congo red (CR) under visible light, resulting in a notable degradation rate of 87.22% in 60 min. The enhanced degradation efficiency is ascribed to the Z-scheme heterojunction charge-transfer mechanism, which augments sustained charge separation while suppressing recombination under visible-light irradiation. Furthermore, the quenching experiments revealed that specific superoxide radicals (O) and hydroxyl radicals (OH) were integral to the degradation reaction, and a potential Z-scheme charge-transfer pathway mechanism for the effective CoSnO/WS@NHCSs photocatalysts was also suggested. The potential degradation mechanism was suggested using LC-MS analysis. This study highlights the promise of CoSnO/WS@NHCSs composites for practical wastewater treatment applications, providing a sustainable and effective solution for environmental remediation.
为应对日益增长的水污染问题，需要开发用于环境净化的先进光催化材料。本文介绍了一种采用水热法合成的新型氮掺杂空心碳球（NHCSs）负载的CoSnO/WS异质结构，并使用各种表征技术对其进行了研究，以评估晶体结构、官能团、表面形态、化学性质和光学特性。通过在可见光下降解刚果红（CR）来评估CoSnO/WS@NHCSs复合材料的光催化性能，在60分钟内的降解率达到了87.22%。降解效率的提高归因于Z型异质结电荷转移机制，该机制在可见光照射下增强了持续的电荷分离，同时抑制了复合。此外，猝灭实验表明特定的超氧自由基（O）和羟基自由基（OH）是降解反应所必需的，并且还提出了有效的CoSnO/WS@NHCSs光催化剂的潜在Z型电荷转移途径机制。使用液相色谱-质谱联用（LC-MS）分析提出了潜在的降解机制。本研究突出了CoSnO/WS@NHCSs复合材料在实际废水处理应用中的前景，为环境修复提供了一种可持续且有效的解决方案。
