Hao Liang, Luan Jingfei
School of Physics, Changchun Normal University, Changchun 130032, China.
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, China.
Molecules. 2024 Dec 16;29(24):5930. doi: 10.3390/molecules29245930.
A highly versatile Z-scheme heterostructure, HoSmSbO/YbDyBiNbO (HYO), was synthesized using an ultrasonic-assisted solvent thermal method. The HYO heterojunction, composed of dual ABO compounds, exhibits superior separation of photogenerated carriers due to its efficient Z-scheme mechanism. The synergistic properties of HoSmSbO and YbDyBiNbO, particularly the excellent visible light absorption, enable HYO to achieve exceptional photocatalytic performance in the degradation of fenitrothion (FNT). Specifically, HYO demonstrated an outstanding removal efficiency of 99.83% for FNT and a mineralization rate of 98.77% for total organic carbon (TOC) during the degradation process. Comparative analyses revealed that HYO significantly outperformed other photocatalysts, including HoSmSbO, YbDyBiNbO, and N-doped TiO, achieving removal rates that were 1.10, 1.20, and 2.97 times higher for FNT, respectively. For TOC mineralization, HYO exhibited even greater enhancements, with rates 1.13, 1.26, and 3.37 times higher than those of the aforementioned catalysts. Additionally, the stability and durability of HYO were systematically evaluated, confirming its potential applicability in practical scenarios. Trapping experiments and electron paramagnetic resonance analyses were conducted to identify the active species generated by HYO, specifically hydroxyl radicals (•OH), superoxide anions (•O), and holes (h). This facilitated a comprehensive understanding of the degradation mechanisms and pathways associated with FNT. In conclusion, this study represents a substantial contribution to the advancement of efficient Z-scheme heterostructure and offers critical insights for the development of sustainable remediation approaches aimed at mitigating FNT contamination.
采用超声辅助溶剂热法合成了一种高度通用的Z型异质结构HoSmSbO/YbDyBiNbO（HYO）。由双ABO化合物组成的HYO异质结，由于其高效的Z型机制，表现出优异的光生载流子分离性能。HoSmSbO和YbDyBiNbO的协同特性，特别是出色的可见光吸收能力，使HYO在降解杀螟硫磷（FNT）方面具有卓越的光催化性能。具体而言，HYO在降解过程中对FNT的去除效率高达99.83%，对总有机碳（TOC）的矿化率为98.77%。对比分析表明，HYO明显优于其他光催化剂，包括HoSmSbO、YbDyBiNbO和N掺杂TiO，对FNT的去除率分别高出1.10倍、1.20倍和2.97倍。对于TOC矿化，HYO表现出更大的提升，其速率比上述催化剂高出1.13倍、1.26倍和3.37倍。此外，还系统评估了HYO的稳定性和耐久性，证实了其在实际场景中的潜在适用性。进行了捕获实验和电子顺磁共振分析，以确定HYO产生的活性物种，特别是羟基自由基（•OH）、超氧阴离子（•O）和空穴（h）。这有助于全面了解与FNT相关的降解机制和途径。总之，本研究为高效Z型异质结构的发展做出了重大贡献，并为开发旨在减轻FNT污染的可持续修复方法提供了关键见解。
