Pompapathi Kurlla, Anantharaju Kurupalya Shivram, Karuppasamy Periyakaruppan, Subramaniam Meena, Uma Bogegowda, Boppanahalli Siddegowda Surendra, Paul Chowdhury Arpita, Murthy H C Ananda
Dr. D. Premachandra Sagar Centre for Advanced Materials, Dayananda Sagar College of Engineering, Bangalore 560078, India.
Department of Material Science, Mangalore University, Mangalore, Karnataka 574199, India.
ACS Environ Au. 2024 Jan 9;4(2):106-125. doi: 10.1021/acsenvironau.3c00057. eCollection 2024 Mar 20.
Novel visible-light-driven Ag ()-doped BiZrO (BZO) nanocomposites in pudina (P) extract ( L.), -1, 3, 5, 7, and 9 mol %, were synthesized by the one-pot greener solution combustion method. The as-synthesized nanocomposite materials were characterized by using various spectral [X-ray diffraction (XRD), Fourier transform infrared, UV-visible, UV- diffuse reflectance spectra, X-ray photoelectron spectroscopy], electrochemical (cyclic voltammetry, electrochemical impedance spectroscopy), and analytical (scanning electron microscopy-energy-dispersive X-ray spectroscopy, transmission electron microscopy, Brunauer-Emmett-Teller) techniques. The average particle size of the nanocomposite material was found to be between 14.8 and 39.2 nm by XRD. The well-characterized Ag-doped BZOP nanocomposite materials exhibited enhanced photocatalytic degradation activity toward hazardous dyes such as methylene blue (MB) and rose bengal (RB) under visible light irradiation ranges between 400 and 800 nm due to their low energy band gap. As a result, 7 mol % of Ag-doped BZOP nanocomposite material exhibited excellent photodegradation activity against MB (D.E. = 98.7%) and RB (D.E. = 99.3%) as compared to other Ag-doped BZOP nanocomposite materials and pure BZOP nanocomposite, respectively, due to enhanced semiconducting and optical behaviors, high binding energy, and mechanical and thermal stabilities. The Ag-doped BZOP nanocomposite material-based electrochemical sensor showed good sensing ability toward the determination of lead nitrate and dextrose with the lowest limit of detection (LOD) of 18 μM and 12 μM, respectively. Furthermore, as a result of the initial antibacterial screening study, the Ag-doped BZOP nanocomposite material was found to be more effective against Gram-negative bacteria () as compared to Gram-positive () bacteria. The scavenger study reveals that radicals such as O and OH are responsible for MB and RB mineralization. TOC removal percentages were found to be 96.8 and 98.5% for MB and RB dyes, and experimental data reveal that the Ag-doped BZOP enhances the radical (O and OH) formation and MB and RB degradation under visible-light irradiation.
采用一锅法绿色溶液燃烧法合成了新型可见光驱动的、掺杂银（）的铋锆氧化物（BZO）纳米复合材料，该复合材料在薄荷提取物（P）（L.）中，银的掺杂量分别为1%、3%、5%、7%和9 mol%。通过各种光谱技术[X射线衍射（XRD）、傅里叶变换红外光谱、紫外可见光谱、紫外漫反射光谱、X射线光电子能谱]、电化学技术（循环伏安法、电化学阻抗谱）和分析技术（扫描电子显微镜-能量色散X射线光谱、透射电子显微镜、布鲁诺尔-埃米特-泰勒比表面积测定法）对合成的纳米复合材料进行了表征。通过XRD发现纳米复合材料的平均粒径在14.8至39.2 nm之间。表征良好的掺杂银的BZOP纳米复合材料在400至800 nm的可见光照射下，由于其低能带隙，对亚甲基蓝（MB）和孟加拉玫瑰红（RB）等有害染料表现出增强的光催化降解活性。结果表明，与其他掺杂银的BZOP纳米复合材料和纯BZOP纳米复合材料相比，7 mol%的掺杂银的BZOP纳米复合材料分别对MB（降解效率=98.7%）和RB（降解效率=99.3%）表现出优异的光降解活性，这归因于其增强的半导体和光学性能、高结合能以及机械和热稳定性。基于掺杂银的BZOP纳米复合材料的电化学传感器对硝酸铅和葡萄糖的测定显示出良好的传感能力，最低检测限（LOD）分别为18 μM和12 μM。此外，初步抗菌筛选研究结果表明，掺杂银的BZOP纳米复合材料对革兰氏阴性菌（）的抗菌效果比对革兰氏阳性菌（）的更好。清除剂研究表明，O和OH等自由基是MB和RB矿化的原因。MB和RB染料的总有机碳去除率分别为96.8%和98.5%，实验数据表明，掺杂银的BZOP在可见光照射下增强了自由基（O和OH）的形成以及MB和RB的降解。
Zotero 插件
