Sonochemical Synthesis of Ti1−x−yFexPbyO2 (with x and y = 0, 0.01, 0.03, 0.07): Structural Analysis, Influence of Radiation Type on Photocatalytic Activity and Assessment of Antimicrobial Properties

IF 2.3 4区 化学 Q3 CHEMISTRY, PHYSICAL Catalysis Letters Pub Date : 2024-11-09 DOI:10.1007/s10562-024-04841-5
D. F. S. Morais, O. B. M. Ramalho, N. F. Andrade Neto, M. D. Teodoro, K. N. Matsui, M. R. D. Bomio, F. V. Motta
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Abstract

In this work, we report a method of obtaining and characterizing (Fe, Pb) co-doped titanium oxide nanoparticles to study the influence of Fe3+ and Pb2+ doping on the photocatalytic and antimicrobial properties of TiO2. The presence of dopant elements can provide electronic changes by promoting a decrease in the band gap or creating intra-band gap states, thereby allowing greater absorption under visible light irradiation and potentially increasing the efficiency for developing photocatalytic and antimicrobial applications. Therefore, co-doped Ti1−x−yFexPbyO2 (x and y = 0, 0.01, 0.03, 0.07 mol) powders were successfully obtained in a single step by the sonochemical method (SM). The structural, morphological and optical properties were evaluated using X-ray diffraction (XRD), transmission electron microscopy (TEM), Field Emission Gun—Scanning Electron Microscopy (SEM-FEG) and UV–Visible spectroscopy (UV–Vis) techniques. The results showed the successful formation of the anatase phase of (Fe, Pb) co-doped TiO2 by the SM with nanometric particles of irregular morphology. The photoluminescence exhibited low intensity for the co-doped samples, indicating a decrease in the recombination rate of the e−/h + electronic pair, which contributes to the photocatalytic efficiency. Optical measurements revealed a decrease in the band gap, providing possible energetic activation of these semiconductors by sunlight. The photocatalytic activity was estimated through the methylene blue dye (MB) degradation when exposed to UV light and Sunlight, and revealed that the type of radiation used to activate the photocatalysts influences the catalytic activity: T1F (Ti0.99Fe0.01O2) and T1P (Ti0.99Pb0.01O2) samples degraded the dye by 50% and 65% under UV light for 120 min, respectively, while the degradation under Solar irradiation was 98% and 99%, respectively. Antimicrobial properties were also investigated by agar diffusion method against E. coli (gram-negative) and S. aureus (gram-positive) bacteria and showed positive results of (Fe, Pb) co-doped TiO2 samples compared to pure TiO2. Accordingly, the results indicate that the co-doping of TiO2 with Fe3+ and Pb2+ influences its potential application as photocatalysts and antimicrobial agents.

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声化学合成 Ti1-x-yFexPbyO2(x 和 y = 0、0.01、0.03、0.07):结构分析、辐射类型对光催化活性的影响以及抗菌性能评估
在这项工作中,我们报告了一种获得和表征(Fe、Pb)共掺杂氧化钛纳米粒子的方法,以研究掺杂 Fe3+ 和 Pb2+ 对二氧化钛光催化和抗菌特性的影响。掺杂元素的存在可通过促进带隙的减小或产生带隙内态来实现电子变化,从而在可见光照射下实现更大的吸收,并有可能提高光催化和抗菌应用的开发效率。因此,采用声化学法(SM)一步法成功地获得了共掺杂 Ti1-x-yFexPbyO2(x 和 y = 0、0.01、0.03、0.07 摩尔)粉末。利用 X 射线衍射(XRD)、透射电子显微镜(TEM)、场发射枪扫描电子显微镜(SEM-FEG)和紫外可见光谱(UV-Vis)技术对粉末的结构、形态和光学性质进行了评估。结果表明,通过 SM 成功地形成了(铁、铅)共掺杂 TiO2 的锐钛矿相,并具有形态不规则的纳米颗粒。共掺杂样品的光致发光强度较低,表明 e-/h + 电子对的重组率降低,这有助于提高光催化效率。光学测量显示带隙减小,这说明这些半导体可能被阳光激活。光催化活性是通过亚甲基蓝染料(MB)在紫外线和日光照射下的降解进行估算的,结果表明,用于激活光催化剂的辐射类型会影响催化活性:T1F(Ti0.99Fe0.01O2)和 T1P(Ti0.99Pb0.01O2)样品在紫外线照射下 120 分钟的染料降解率分别为 50%和 65%,而在太阳光照射下的降解率分别为 98%和 99%。此外,还采用琼脂扩散法对大肠杆菌(革兰氏阴性)和金黄色葡萄球菌(革兰氏阳性)进行了抗菌性能研究,结果表明,与纯 TiO2 相比,(铁、铅)共掺杂 TiO2 样品具有良好的抗菌性能。因此,研究结果表明,TiO2 与 Fe3+ 和 Pb2+ 的共掺杂影响了其作为光催化剂和抗菌剂的潜在应用。
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来源期刊
Catalysis Letters
Catalysis Letters 化学-物理化学
CiteScore
5.70
自引率
3.60%
发文量
327
审稿时长
1 months
期刊介绍: Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.
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