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Abstract：
This study presents a pioneering synthesis of a direct Z-scheme Y2TmSbO7/GdYBiNbO7 heterojunction photocatalyst (YGHP) using an ultrasound-assisted hydrothermal synthesis technique. Additionally, novel photocatalytic nanomaterials, namely Y2TmSbO7 and GdYBiNbO7, were fabricated via the hydrothermal fabrication technique. A comprehensive range of characterization techniques, including X-ray diffractometry, Fourier-transform infrared spectroscopy, Raman spectroscopy, UV-visible spectrophotometry, X-ray photoelectron spectroscopy, transmission electron microscopy, X-ray energy-dispersive spectroscopy, fluorescence spectroscopy, photocurrent testing, electrochemical impedance spectroscopy, ultraviolet photoelectron spectroscopy, and electron paramagnetic resonance, was employed to thoroughly investigate the morphological features, composition, chemical, optical, and photoelectric properties of the fabricated samples. The photocatalytic performance of YGHP was assessed in the degradation of the pesticide acetochlor (AC) and the mineralization of total organic carbon (TOC) under visible light exposure, demonstrating eximious removal efficiencies. Specifically, AC and TOC exhibited removal rates of 99.75% and 97.90%, respectively. Comparative analysis revealed that YGHP showcased significantly higher removal efficiencies for AC compared to the Y2TmSbO7, GdYBiNbO7, or N-doped TiO2 photocatalyst, with removal rates being 1.12 times, 1.21 times, or 3.07 times higher, respectively. Similarly, YGHP demonstrated substantially higher removal efficiencies for TOC than the aforementioned photocatalysts, with removal rates 1.15 times, 1.28 times, or 3.51 times higher, respectively. These improvements could be attributed to the Z-scheme charge transfer configuration, which preserved the preferable redox capacities of Y2TmSbO7 and GdYBiNbO7. Furthermore, the stability and durability of YGHP were confirmed, affirming its potential for practical applications. Trapping experiments and electron spin resonance analyses identified active species generated by YGHP, namely •OH, •O2-, and h+, allowing for comprehensive analysis of the degradation mechanisms and pathways of AC. Overall, this investigation advances the development of efficient Z-scheme heterostructural materials and provides valuable insights into formulating sustainable remediation strategies for combatting AC contamination.
摘要：
这项研究提出了使用超声辅助水热合成技术的直接Z方案Y2TmSbO7/GdYBiNbO7异质结光催化剂（YGHP）的开创性合成。此外,新型光催化纳米材料，Y2TmSbO7和GdYBiNbO7是通过水热制造技术制造的。全面的表征技术，包括X射线衍射,傅里叶变换红外光谱,拉曼光谱,紫外可见分光光度法,X射线光电子能谱,透射电子显微镜,X射线能量色散光谱,荧光光谱法，光电流测试,电化学阻抗谱，紫外光电子能谱,和电子顺磁共振，被用来彻底调查形态特征，composition,化学,光学，和制备的样品的光电性能。在可见光暴露下，在农药乙草胺（AC）的降解和总有机碳（TOC）的矿化中评估了YGHP的光催化性能，展示了巨大的去除效率。具体来说,AC和TOC的去除率分别为99.75%和97.90%,分别。比较分析表明，与Y2TmSbO7，GdYBiNbO7或N掺杂的TiO2光催化剂相比，YGHP对AC的去除效率显着提高，去除率为1.12倍，1.21倍，或3.07倍，分别。同样，YGHP对TOC的去除效率明显高于上述光催化剂，去除率为1.15倍，1.28倍，或者高出3.51倍，分别。这些改进可以归因于Z方案电荷转移配置，保留了Y2TmSbO7和GdYBiNbO7较好的氧化还原容量。此外，YGHP的稳定性和耐久性得到证实，肯定其实际应用的潜力。捕获实验和电子自旋共振分析确定了YGHP产生的活性物种，即•OH，•O2-,和h+,允许对AC的降解机制和途径进行全面分析。总的来说,这项调查促进了高效Z方案异质结构材料的开发，并为制定可持续的治理策略以对抗AC污染提供了宝贵的见解。
