Wu Jun, Shao Gaofeng, Wu Xiaodong, Cui Sheng, Shen Xiaodong
College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China.
Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 211816, China.
Nanomaterials (Basel). 2024 May 13;14(10):848. doi: 10.3390/nano14100848.
A novel Cr-doped BaTiO aerogel was successfully synthesized using a co-gelation technique that involves two metallic alkoxides and a supercritical drying method. This freshly prepared aerogel has a high specific surface area of over 100 m/g and exhibits improved responsiveness to the simulated sunlight spectrum. Methyl orange (MO) was chosen as the simulated pollutant, and the results reveal that the Cr-doped BaTiO aerogel, when modified with the noble metal silver (Ag), achieves a pollutant removal rate approximately 3.2 times higher than that of the commercially available P25, reaching up to 92% within 60 min. The excellent photocatalytic performance of the Ag-modified Cr-doped BaTiO aerogel can be primarily attributed to its extensive specific surface area and three-dimensional porous architecture. Furthermore, the incorporation of Ag nanoparticles effectively suppresses the recombination of photo-generated electrons and holes. Stability and reusability tests have confirmed the reliability of the Ag-modified Cr-doped BaTiO aerogel. Therefore, this material emerges as a highly promising candidate for the treatment of textile wastewater.
采用涉及两种金属醇盐的共凝胶技术和超临界干燥方法，成功合成了一种新型的Cr掺杂BaTiO气凝胶。这种新制备的气凝胶具有超过100 m²/g的高比表面积，并对模拟太阳光光谱表现出更高的响应性。选择甲基橙（MO）作为模拟污染物，结果表明，用贵金属银（Ag）改性的Cr掺杂BaTiO气凝胶实现的污染物去除率比市售的P25高约3.2倍，在60分钟内可达92%。Ag改性的Cr掺杂BaTiO气凝胶优异的光催化性能主要归因于其广泛的比表面积和三维多孔结构。此外，Ag纳米颗粒的掺入有效地抑制了光生电子和空穴的复合。稳定性和可重复使用性测试证实了Ag改性的Cr掺杂BaTiO气凝胶的可靠性。因此，这种材料成为处理纺织废水的极具前景的候选材料。
