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مقالات فارسیISIکنفرانسهاژورنالها

Effect of Heat Treatment on Formation of Calcium Titanate Hollow-Crystals Nanostructures Prepared by Hydrothermal Method

محل انتشار: مجله علم مواد و مهندسی ایران، دوره: 17، شماره: 2
سال انتشار: 1399
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 109

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استخراج به نرم افزارهای پژوهشی:

لینک ثابت به این مقاله:
https://civilica.com/doc/1606435

شناسه ملی سند علمی:

JR_IJMSEI-17-2_001

تاریخ نمایه سازی: 1 اسفند 1401

چکیده مقاله:

In this research, calcium titanate (CaTiO۳) hollow crystals have been successfully prepared via hydrothermal method. Titanium tetrachloride, calcium chloride dihydrate and potassium hydroxide were used as Ti, Ca and precipitating agent, respectively. The hydrothermal synthesis was performed at different temperatures and time durations. The negative amount of the Gibbs free energy shows the reactivity of the reaction at room temperature. Characterization of CaTiO۳ was carried out using scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD). The optimum condition for preparing CaTiO۳ is the sample kept in an autoclave at ۳۰۰ ℃ for ۳ h that requires less energy and time which consists of a high degree of crystallinity. In this research, tetragonal CaTiO۳ hollow crystals have been successfully prepared via hydrothermal method. TiCl۴, CaCl۲.۲H۲O, and KOH were used as Ti, Ca and precipitating agent, respectively. The hydrothermal synthesis was performed at different temperatures and time durations. Characterization of CaTiO۳ was carried out using SEM, HRTEM, and XRD. The sample kept in the autoclave at ۳۰۰ ℃ for ۳ h well crystallized and required less energy and time for synthesis. The powder has a homogenous dispersity of crystals with the range of nanometer to micrometer sizes which makes it a good candidate as a photocatalyst material

کلیدواژه ها:

hydrothermal ، crystal growth ، morphology ، nanostructure

نویسندگان

S. Manafi

Department of Engineering, Shahrood Branch, Islamic Azad University, Shahrood, Iran

S. Joughehdoust

Department of Engineering, Shahrood Branch, Islamic Azad University, Shahrood, Iran

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