以PVP为软模板构建的层状介孔TiO2及其光催化性能

doi:10.11896/cldb.21080004

材料导报

2023, Vol. 37

Issue (4): 21080004-6 https://doi.org/10.11896/cldb.21080004

无机非金属及其复合材料

以PVP为软模板构建的层状介孔TiO₂及其光催化性能

张理元^1,2,*, 阳金菊¹, 尤佳¹

1 内江师范学院化学化工学院,四川内江 641112
2 果类废弃物资源化四川省高校重点实验室,四川内江 641112

Construction of Layered Mesoporous TiO₂ Using PVP as Soft Template and Its Photocatalytic Performance

ZHANG Liyuan^1,2,*, YANG Jinju¹, YOU Jia¹

1 College of Chemistry and Chemical Engineering, Neijiang Normal University, Neijiang 641112, Sichuan, China
2 Key Laboratory of Fruit Waste Treatment and Resource Recycling of the Sichuan Provincial College, Neijiang 641112, Sichuan, China

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摘要以聚乙烯吡咯烷酮(PVP)为软模板、硫酸钛为钛源,采用无机沉淀-胶溶法制备了层状介孔PVP-TiO₂。采用扫描电子显微镜(SEM)、X射线衍射仪(XRD)、紫外可见吸收光谱(UV-Vis-Abs)、比表面积分析仪(BET)分别对样品的表面形貌、晶相组成、紫外吸收带边、比表面积和孔结构进行了表征分析,对层状结构的形成机理进行了研究。以甲基橙为目标降解物,研究了样品的光催化性能。结果表明:在相同条件下,PVP-TiO₂对甲基橙的最佳降解率达到93.84%,明显高于纯TiO₂。经PVP改性后,TiO₂试样出现了层状介孔结构,结晶度和晶粒尺寸均减小,促进了锐钛矿向金红石相的转变,并且PVP的引入使得TiO₂的光吸收带边发生了一定的蓝移。

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关键词: 沉淀-胶溶法 PVP 软模板层状介孔TiO₂ 光催化

Abstract: The layered mesoporous PVP-TiO₂ was prepared by inorganic precipitation-peptization method using titanium sulfate as titanium source and polyvinylpyrrolidone as soft template. The surface morphology, crystal phase composition, ultraviolet absorption band edge, specific surface area and pore structure of the samples were characterized by scanning electron microscopy (SEM), X-Ray diffractometer (XRD), ultraviolet visible absorption spectrum (UV-Vis-Abs), and specific surface area meter (BET), respectively. The formation mechanism of layered structure was studied as well. The photocatalytic properties of the samples were studied by using methyl orange as the target degradation product. The results showed that the best degradation rate of methyl orange by PVP-TiO₂ reached 93.84%, which was significantly higher than that of pure TiO₂under the same conditions. After TiO₂ was modified by PVP, layered mesoporous structure was formed, and the crystallinity and grain size were decreased, promoting the transition from anatase to rutile crystal. In addition, the introduction of PVP made a blue shift of the light absorption band edge of TiO₂.

Key words: precipitation-peptization method PVP soft template layered mesoporous TiO₂ photocatalysis

出版日期: 2023-02-25 发布日期: 2023-03-02

ZTFLH:

TB34

基金资助: 四川省科技计划(2023YFG0247)

通讯作者: * 张理元,内江师范学院化学化工学院教授。2008年6月毕业于海南大学材料科学与工程专业,获工学学士学位;2011年6月毕业于海南大学材料物理与化学专业,获工学硕士学位;2014年12月毕业于四川大学材料学专业,获工学博士学位。主要从事无机功能材料、环境保护材料研究。主持四川省科技计划项目2项、四川省教育厅重点项目1项。近几年,以第一作者在国内外重要期刊发表学术论文30余篇,其中SCI/EI收录20余篇。zhangliyuansir@126.com

引用本文:

张理元, 阳金菊, 尤佳. 以PVP为软模板构建的层状介孔TiO₂及其光催化性能[J]. 材料导报, 2023, 37(4): 21080004-6.
ZHANG Liyuan, YANG Jinju, YOU Jia. Construction of Layered Mesoporous TiO₂ Using PVP as Soft Template and Its Photocatalytic Performance. Materials Reports, 2023, 37(4): 21080004-6.

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http://www.mater-rep.com/CN/10.11896/cldb.21080004 或 http://www.mater-rep.com/CN/Y2023/V37/I4/21080004

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