Review of the sol–gel method in preparing nano TiO2 for advanced oxidation process

IF 6.1 3区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Cheng Chang, Saeed Rad, Lei Gan, Zitao Li, Junfeng Dai, Asfandyar Shahab
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引用次数: 0

Abstract

Abstract Application of nano titanium dioxide (TiO 2 ) in various fields such as advanced oxidation process (AOP) has led to the development of its preparation technologies. The sol–gel process is a widely used chemical wet method for preparing nanoscale TiO 2 gels. This technique offers numerous advantages, such as the potential to produce large quantities of homogeneous materials with high purity, surface area, porosity, and reactivity, as well as being cost-effective, simple to implement, and capable of controlling the size and shape of the resulting particles. This review provides a comprehensive overview of the chemicals, reaction conditions, and procedures required for preparing nano TiO 2 using the sol–gel method. It covers the selection of necessary compounds, such as TiO 2 precursors, solvents, hydrolysis agents, and additives, along with their composition and sequences of adding, reaction order, and impact on the final product. Additionally, it provides detailed information on the routes of gel formation and ambient conditions, including temperature, humidity, stirring speed, injection rates of compounds, aging process, and storage conditions. This information serves as a basic reference for understanding the sol–gel process and the relative contribution rates of the influencing factors, which is essential for controlling the size, morphology, crystallinity, and other physicochemical properties of the resulting TiO 2 gel/powder for targeted applications.
溶胶-凝胶法制备纳米二氧化钛的研究进展
摘要纳米二氧化钛(tio2)在高级氧化工艺(AOP)等各个领域的应用,带动了其制备技术的发展。溶胶-凝胶法是一种广泛应用的制备纳米二氧化钛凝胶的化学湿法。该技术具有许多优点,例如可以生产大量具有高纯度、高表面积、高孔隙率和高反应性的均质材料,并且具有成本效益、易于实现,并且能够控制所得颗粒的大小和形状。本文综述了溶胶-凝胶法制备纳米二氧化钛所需的化学物质、反应条件和程序。它涵盖了必要化合物的选择,如二氧化钛前驱体、溶剂、水解剂和添加剂,以及它们的组成和添加顺序、反应顺序和对最终产品的影响。此外,它还提供了凝胶形成路线和环境条件的详细信息,包括温度、湿度、搅拌速度、化合物的注射速度、老化过程和储存条件。这些信息为了解溶胶-凝胶过程和影响因素的相对贡献率提供了基本参考,这对于控制所得到的二氧化钛凝胶/粉末的尺寸、形态、结晶度和其他物理化学性质至关重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Nanotechnology Reviews
Nanotechnology Reviews CHEMISTRY, MULTIDISCIPLINARY-NANOSCIENCE & NANOTECHNOLOGY
CiteScore
11.40
自引率
13.50%
发文量
137
审稿时长
7 weeks
期刊介绍: The bimonthly journal Nanotechnology Reviews provides a platform for scientists and engineers of all involved disciplines to exchange important recent research on fundamental as well as applied aspects. While expert reviews provide a state of the art assessment on a specific topic, research highlight contributions present most recent and novel findings. In addition to technical contributions, Nanotechnology Reviews publishes articles on implications of nanotechnology for society, environment, education, intellectual property, industry, and politics.
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