水解催化剂制备二氧化钛:煅烧温度对聚合纳米复合材料微观结构特征的影响

IF 1.1 4区 工程技术 Q3 CHEMISTRY, ORGANIC
Rasheed Lateef Jawad, Raghad Subhi Abbas
{"title":"水解催化剂制备二氧化钛:煅烧温度对聚合纳米复合材料微观结构特征的影响","authors":"Rasheed Lateef Jawad,&nbsp;Raghad Subhi Abbas","doi":"10.1134/S0965544125040061","DOIUrl":null,"url":null,"abstract":"<p> In this study, titanium dioxide (TiO<sub>2</sub>) nanoparticles were prepared hydrolysis and condensation process. To obtain the anatase and rutile phases, the prepared product was subjected to a calcination process at a temperature of 400 and 700°C. Nanocomposites were adjusted from polymer blend of polyvinyl alcohol (PVA), polyethylene glycol (PEG), and polyvinylpyrrolidone (PVP) as a matrix with specific percentages (PVA 60, PEG 10, and PVP 5 wt %), and different concentrations (0 and 25 wt %) of TiO<sub>2</sub> NPs in the anatase and rutile phases. Several description techniques like X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), and energy dispersive spectroscopy (EDS) are utilized to investigate the impact of temperature on the crystalline size, crystalline phase, and shape of produced TiO<sub>2</sub> nanoparticles. XRD patterns show the presence of sharp peaks which proved that it had high degree of crystallization. The anatase phase formation occurs at 400°C, while the transition to rutile phase occurred at 700°C as a result of calcination process. The crystallite size was determined using the Scherer and Williamson‒Hall (W‒H) equations, micro-strain, degree of crystallinity, volume of the unit cell, and dislocation. An increase in calcination temperature leads to increase in both crystalline size and degree of crystallinity. FE-SEM micrographs reveal that increasing the temperature led to rise the size of TiO<sub>2</sub> nanoparticles. In the anatase phase, the particles exhibit a spherical shape, while in the rutile phase they often have a prismatic shape. The calcination at 700°C is considered more desirable and applicable, because of the incorporation of rutile with anatase—the heterophase—into the crystal structure. It leads to synergistic effects between the two crystal structures due to increased thermodynamic stability, which makes it effective in photodegradation of various pollutants in the environment.</p>","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"65 5","pages":"566 - 575"},"PeriodicalIF":1.1000,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Formation of Titanium Dioxide by Hydrolysis Catalyst: Effect of Calcination Temperature on Microstructure Characteristics of Polymeric Nanocomposites\",\"authors\":\"Rasheed Lateef Jawad,&nbsp;Raghad Subhi Abbas\",\"doi\":\"10.1134/S0965544125040061\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p> In this study, titanium dioxide (TiO<sub>2</sub>) nanoparticles were prepared hydrolysis and condensation process. To obtain the anatase and rutile phases, the prepared product was subjected to a calcination process at a temperature of 400 and 700°C. Nanocomposites were adjusted from polymer blend of polyvinyl alcohol (PVA), polyethylene glycol (PEG), and polyvinylpyrrolidone (PVP) as a matrix with specific percentages (PVA 60, PEG 10, and PVP 5 wt %), and different concentrations (0 and 25 wt %) of TiO<sub>2</sub> NPs in the anatase and rutile phases. Several description techniques like X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), and energy dispersive spectroscopy (EDS) are utilized to investigate the impact of temperature on the crystalline size, crystalline phase, and shape of produced TiO<sub>2</sub> nanoparticles. XRD patterns show the presence of sharp peaks which proved that it had high degree of crystallization. The anatase phase formation occurs at 400°C, while the transition to rutile phase occurred at 700°C as a result of calcination process. The crystallite size was determined using the Scherer and Williamson‒Hall (W‒H) equations, micro-strain, degree of crystallinity, volume of the unit cell, and dislocation. An increase in calcination temperature leads to increase in both crystalline size and degree of crystallinity. FE-SEM micrographs reveal that increasing the temperature led to rise the size of TiO<sub>2</sub> nanoparticles. In the anatase phase, the particles exhibit a spherical shape, while in the rutile phase they often have a prismatic shape. The calcination at 700°C is considered more desirable and applicable, because of the incorporation of rutile with anatase—the heterophase—into the crystal structure. It leads to synergistic effects between the two crystal structures due to increased thermodynamic stability, which makes it effective in photodegradation of various pollutants in the environment.</p>\",\"PeriodicalId\":725,\"journal\":{\"name\":\"Petroleum Chemistry\",\"volume\":\"65 5\",\"pages\":\"566 - 575\"},\"PeriodicalIF\":1.1000,\"publicationDate\":\"2025-07-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Petroleum Chemistry\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S0965544125040061\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, ORGANIC\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Petroleum Chemistry","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1134/S0965544125040061","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, ORGANIC","Score":null,"Total":0}
引用次数: 0

摘要

本研究采用水解缩合法制备了二氧化钛纳米颗粒。为了得到锐钛矿和金红石相,制备的产物在400和700℃的温度下进行了煅烧处理。以聚乙烯醇(PVA)、聚乙二醇(PEG)和聚乙烯吡咯烷酮(PVP)的共混聚合物为基体,以特定的百分比(PVA 60 wt %, PEG 10 wt %, PVP 5 wt %)和锐钛矿和金红石相TiO2 NPs的不同浓度(0 wt %和25 wt %)调整纳米复合材料。利用x射线衍射(XRD)、场发射扫描电镜(FE-SEM)和能量色散光谱(EDS)等描述技术研究了温度对制备的TiO2纳米颗粒的晶粒尺寸、晶相和形状的影响。XRD谱图显示出尖锐的峰,证明其具有较高的结晶程度。在400℃时形成锐钛矿相,在700℃时由于煅烧过程向金红石相转变。利用Scherer和Williamson-Hall (W-H)方程、微应变、结晶度、晶胞体积和位错来确定晶体尺寸。煅烧温度的升高导致结晶尺寸和结晶度的增大。FE-SEM显微图显示,温度升高导致TiO2纳米颗粒尺寸增大。在锐钛矿相中,颗粒呈球形,而在金红石相中,颗粒通常呈棱柱形。由于金红石与锐钛矿(异相)结合到晶体结构中,在700°C下煅烧被认为是更理想和适用的。由于热力学稳定性的提高,导致两种晶体结构之间产生协同效应,从而有效地光降解环境中的各种污染物。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Formation of Titanium Dioxide by Hydrolysis Catalyst: Effect of Calcination Temperature on Microstructure Characteristics of Polymeric Nanocomposites

Formation of Titanium Dioxide by Hydrolysis Catalyst: Effect of Calcination Temperature on Microstructure Characteristics of Polymeric Nanocomposites

In this study, titanium dioxide (TiO2) nanoparticles were prepared hydrolysis and condensation process. To obtain the anatase and rutile phases, the prepared product was subjected to a calcination process at a temperature of 400 and 700°C. Nanocomposites were adjusted from polymer blend of polyvinyl alcohol (PVA), polyethylene glycol (PEG), and polyvinylpyrrolidone (PVP) as a matrix with specific percentages (PVA 60, PEG 10, and PVP 5 wt %), and different concentrations (0 and 25 wt %) of TiO2 NPs in the anatase and rutile phases. Several description techniques like X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM), and energy dispersive spectroscopy (EDS) are utilized to investigate the impact of temperature on the crystalline size, crystalline phase, and shape of produced TiO2 nanoparticles. XRD patterns show the presence of sharp peaks which proved that it had high degree of crystallization. The anatase phase formation occurs at 400°C, while the transition to rutile phase occurred at 700°C as a result of calcination process. The crystallite size was determined using the Scherer and Williamson‒Hall (W‒H) equations, micro-strain, degree of crystallinity, volume of the unit cell, and dislocation. An increase in calcination temperature leads to increase in both crystalline size and degree of crystallinity. FE-SEM micrographs reveal that increasing the temperature led to rise the size of TiO2 nanoparticles. In the anatase phase, the particles exhibit a spherical shape, while in the rutile phase they often have a prismatic shape. The calcination at 700°C is considered more desirable and applicable, because of the incorporation of rutile with anatase—the heterophase—into the crystal structure. It leads to synergistic effects between the two crystal structures due to increased thermodynamic stability, which makes it effective in photodegradation of various pollutants in the environment.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Petroleum Chemistry
Petroleum Chemistry 工程技术-工程:化工
CiteScore
2.50
自引率
21.40%
发文量
102
审稿时长
6-12 weeks
期刊介绍: Petroleum Chemistry (Neftekhimiya), founded in 1961, offers original papers on and reviews of theoretical and experimental studies concerned with current problems of petroleum chemistry and processing such as chemical composition of crude oils and natural gas liquids; petroleum refining (cracking, hydrocracking, and catalytic reforming); catalysts for petrochemical processes (hydrogenation, isomerization, oxidation, hydroformylation, etc.); activation and catalytic transformation of hydrocarbons and other components of petroleum, natural gas, and other complex organic mixtures; new petrochemicals including lubricants and additives; environmental problems; and information on scientific meetings relevant to these areas. Petroleum Chemistry publishes articles on these topics from members of the scientific community of the former Soviet Union.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信