Production and characterization of TixOy films by reactive magnetron sputtering deposited on substrate laminar Bamboo for the inactivation of Escherichia coli 226 in domestic wastewater

IF 4.7 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics Pub Date : 2025-07-09 DOI:10.1016/j.matchemphys.2025.131260

Luis A. Cañón-Tafur , Mayra Alexandra Garzón-Gonzalez , Camila Gracia-Sanchez , Lucia A. Díaz-Ariza , Carlos E. Ostos-Ortiz , Alejandro Pérez-Florez , Aura M. Pedroza-Rodríguez , Luis C. Jiménez-Borrego

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Abstract

This study presents the synthesis and characterization of titanium oxide (TixOy) thin films deposited by DC reactive magnetron sputtering on biochar substrates derived from Guadua angustifolia laminated bamboo. The biochar was obtained via controlled pyrolysis at 300 °C, resulting in thermally and mechanically stable substrates suitable for oxide thin film growth. A 2² factorial design and a general factorial approach were employed to evaluate the effects of discharge power, target oxidation state, and annealing temperature on the crystallinity, morphology, and optical behaviour of the TixOy monolayers. Additionally, multilayer configurations were fabricated to improve film homogeneity and surface performance.

Comprehensive physicochemical characterization using XRD, FTIR, UV–VIS DRS, SEM-EDS, and XPS revealed mixed anatase/rutile phase formation, increased surface oxygen vacancies, and tuneable optical band gaps ranging from 3.52 to 3.16 eV, with a redshift observed as the number of layers increased. The evolution of these properties was strongly correlated with the deposition parameters, demonstrating precise control over the structural and interfacial features of the films. The results demonstrate the potential of combining natural-origin carbon substrates with reactive sputtering to obtain functional oxide films with tailored optoelectronic and surface properties, supported by 37.6 ± 9.4 % E. coli inactivation under UV exposure in 30 min.

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反应磁控溅射法制备TixOy薄膜对生活废水中大肠杆菌226的灭活研究

采用直流反应磁控溅射法制备了一种新型的氧化钛（TixOy）薄膜。生物炭在300°C的受控热解下得到，从而得到热稳定性和机械稳定性都适合于氧化薄膜生长的底物。采用22因子设计和一般因子方法来评估放电功率、目标氧化态和退火温度对TixOy单层的结晶度、形貌和光学行为的影响。此外，制备了多层结构，以改善膜的均匀性和表面性能。利用XRD、FTIR、UV-VIS DRS、SEM-EDS和XPS进行综合理化表征，发现锐钛矿/金红石混合相形成，表面氧空位增加，光学带隙可调，范围在3.52 ~ 3.16 eV之间，且随着层数的增加出现了红移。这些性质的演变与沉积参数密切相关，表明了对薄膜结构和界面特征的精确控制。结果表明，将天然碳衬底与反应溅射相结合，可以获得具有定制光电和表面性能的功能性氧化膜，并在紫外线照射30分钟内使大肠杆菌失活37.6%±9.4%。

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来源期刊

Materials Chemistry and Physics 工程技术-材料科学：综合

CiteScore

8.70

自引率

4.30%

发文量

1515

审稿时长

69 days

期刊介绍： Materials Chemistry and Physics is devoted to short communications, full-length research papers and feature articles on interrelationships among structure, properties, processing and performance of materials. The Editors welcome manuscripts on thin films, surface and interface science, materials degradation and reliability, metallurgy, semiconductors and optoelectronic materials, fine ceramics, magnetics, superconductors, specialty polymers, nano-materials and composite materials.