Variation of anatase and rutile concentrations in TiO2 electrospun fibers via precursor solution modification

IF 4.3 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Journal of Physics and Chemistry of Solids Pub Date : 2025-07-16 DOI:10.1016/j.jpcs.2025.113028

Jairo Enrique Moreno Orea, Justo Miguel Gracia y Jiménez, Nicolás Rutilo Silva González, Sergio Alberto Sabinas Hernández, Ulises Salazar Kuri

{"title":"Variation of anatase and rutile concentrations in TiO2 electrospun fibers via precursor solution modification","authors":"Jairo Enrique Moreno Orea, Justo Miguel Gracia y Jiménez, Nicolás Rutilo Silva González, Sergio Alberto Sabinas Hernández, Ulises Salazar Kuri","doi":"10.1016/j.jpcs.2025.113028","DOIUrl":null,"url":null,"abstract":"<div><div>Titanium dioxide (TiO<sub>2</sub>) nanofibers were obtained via the electrospinning of different precursor solutions containing polyvinylpyrrolidone (PVP), titanium butoxide (Ti(OBu)<sub>4</sub>), and different amounts of acetic acid (CH<sub>3</sub>COOH) and ethanol (CH<sub>3</sub>CH<sub>2</sub>OH). The effect of modifying the molar relations between the ethanol and acetic acid over the anatase and rutile concentration of the calcined fibers was explored. Morphological analysis of the samples indicated that nanofibers formed by grains of different sizes were obtained. Structural characterization showed that by increasing the ethanol amount it was possible to achieve anatase-rich nanofibers, with a maximum anatase content of 91.7 wt%; moreover, as the acetic acid molar relation increased, the concentration of the rutile phase gradually increased. A possible explanation of this behavior was considered through analysis of the formation of different titanium coordination modes during the hydrolysis and condensation of uncalcined TiO<sub>2</sub> fibers. Thermal analysis using differential scanning calorimetry (DSC) and thermogravimetry (TG) was performed to investigate the phase transition of the samples. Finally, the materials obtained were evaluated as photocatalysts, the results of which suggested better performance for samples with a mixture of phases.</div></div>","PeriodicalId":16811,"journal":{"name":"Journal of Physics and Chemistry of Solids","volume":"208 ","pages":"Article 113028"},"PeriodicalIF":4.3000,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Physics and Chemistry of Solids","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022369725004809","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

Titanium dioxide (TiO₂) nanofibers were obtained via the electrospinning of different precursor solutions containing polyvinylpyrrolidone (PVP), titanium butoxide (Ti(OBu)₄), and different amounts of acetic acid (CH₃COOH) and ethanol (CH₃CH₂OH). The effect of modifying the molar relations between the ethanol and acetic acid over the anatase and rutile concentration of the calcined fibers was explored. Morphological analysis of the samples indicated that nanofibers formed by grains of different sizes were obtained. Structural characterization showed that by increasing the ethanol amount it was possible to achieve anatase-rich nanofibers, with a maximum anatase content of 91.7 wt%; moreover, as the acetic acid molar relation increased, the concentration of the rutile phase gradually increased. A possible explanation of this behavior was considered through analysis of the formation of different titanium coordination modes during the hydrolysis and condensation of uncalcined TiO₂ fibers. Thermal analysis using differential scanning calorimetry (DSC) and thermogravimetry (TG) was performed to investigate the phase transition of the samples. Finally, the materials obtained were evaluated as photocatalysts, the results of which suggested better performance for samples with a mixture of phases.

查看原文本刊更多论文

前驱体溶液改性对TiO2静电纺丝纤维中锐钛矿和金红石浓度的影响

以聚乙烯吡啶酮（PVP）、丁氧化钛（Ti(OBu)4）、乙酸（CH3COOH）和乙醇（CH3CH2OH）为前驱体，采用静电纺丝法制备了二氧化钛（TiO2）纳米纤维。探讨了改性乙醇与乙酸的摩尔关系对煅烧纤维锐钛矿和金红石浓度的影响。对样品进行形貌分析，得到了由不同粒径颗粒组成的纳米纤维。结构表征表明，增加乙醇用量可以得到富含锐钛矿的纳米纤维，锐钛矿含量最高可达91.7 wt%；此外，随着乙酸摩尔关系的增加，金红石相的浓度逐渐增加。通过分析未煅烧TiO2纤维在水解和缩合过程中不同钛配位模式的形成，对这种行为进行了可能的解释。采用差示扫描量热法（DSC）和热重法（TG）对样品的相变进行了热分析。最后，将所得材料作为光催化剂进行了评价，结果表明混合相的样品具有更好的性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Physics and Chemistry of Solids 工程技术-化学综合

CiteScore

7.80

自引率

2.50%

发文量

605

审稿时长

40 days

期刊介绍： The Journal of Physics and Chemistry of Solids is a well-established international medium for publication of archival research in condensed matter and materials sciences. Areas of interest broadly include experimental and theoretical research on electronic, magnetic, spectroscopic and structural properties as well as the statistical mechanics and thermodynamics of materials. The focus is on gaining physical and chemical insight into the properties and potential applications of condensed matter systems. Within the broad scope of the journal, beyond regular contributions, the editors have identified submissions in the following areas of physics and chemistry of solids to be of special current interest to the journal: Low-dimensional systems Exotic states of quantum electron matter including topological phases Energy conversion and storage Interfaces, nanoparticles and catalysts.