School of Forestry, Henan Agricultural University, Zhengzhou 450002, China; School of Environmental Studies, China University of Geosciences, Wuhan 430074, China.
School of Forestry, Henan Agricultural University, Zhengzhou 450002, China.
Int J Biol Macromol. 2021 Feb 1;169:436-442. doi: 10.1016/j.ijbiomac.2020.12.049. Epub 2020 Dec 9.
Recently, photo-degradation process under ultraviolet-light irradiation is being used as a substantial treatment method for the removal of environmental pollution. In this study, a silver phosphate-ilmenite (AgPO-FeTiO) hetero structure supported on glycol chitosan catalyst was completely prepared, also, and its structural, and optical properties were characterized. Meantime, scanning electron microscopy, X-ray diffraction, X-ray photoelectron, and UV-vis spectra were applied. The AgPO-FeTiO/glycol chitosan catalyst was used to degrade metronidazole under visible-light irradiation. The degradation rate of metronidazole in 25 min by AgPO-FeTiO/glycol chitosan nanocomposites was found to be 99.2% under UV light irradiation, which was higher than that by AgPO-FeTiO (72.24%) and FeTiO (35.5%), respectively. The active species trapping test of AgPO-FeTiO/glycol chitosan indicated that ·OH and ·O participated during the reaction. The diffusion method was evaluated to appraise the bactericidal activity of the synthesized nanomaterials when tested against both Staphylococcus aureus and Escherichia coli bacteria, with or without LED-light irradiation. The antibacterial tests show higher inhibition zones under light illumination as compared to dark conditions. The antifungal properties of the prepared nanomaterials were analyzed by fungi (Aspergillus niger, and Fusarium solani) using disc diffusion analysis. It was confirmed that the prepared nanomaterials have the best antifungal agent as compared to the standard antibiotics. When the AgPO-FeTiO/glycol chitosan was used, the amount of inhibition zone was enhanced.
最近，光降解过程在紫外光照射下被用作去除环境污染的一种重要处理方法。在这项研究中，完全制备了一种负载在乙二醇壳聚糖催化剂上的磷酸银-钛铁矿（AgPO-FeTiO）杂化结构，并对其结构和光学性质进行了表征。同时，应用了扫描电子显微镜、X 射线衍射、X 射线光电子能谱和紫外可见光谱。AgPO-FeTiO/glycol chitosan 催化剂用于可见光照射下的甲硝唑降解。在 25 分钟内，AgPO-FeTiO/glycol chitosan 纳米复合材料在紫外光照射下对甲硝唑的降解率达到 99.2%，高于 AgPO-FeTiO（72.24%）和 FeTiO（35.5%）。AgPO-FeTiO/glycol chitosan 的活性物种捕获试验表明，在反应过程中·OH 和·O 参与了反应。采用扩散法评价了合成纳米材料对金黄色葡萄球菌和大肠杆菌的杀菌活性，分别在有无 LED 光照下进行了测试。与黑暗条件相比，光照下的抑菌试验显示出更高的抑菌圈。采用圆盘扩散分析对制备的纳米材料的抗真菌性能进行了分析，发现与标准抗生素相比，制备的纳米材料具有最佳的抗真菌作用。当使用 AgPO-FeTiO/glycol chitosan 时，抑制区的数量增加。
