Fluorine-Free Synthesis of Well-Dispersed Hollow TiO2 Spheres via Ostwald Ripening: Process, Mechanism, and Photocatalytic Performance

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	Fluorine-Free Synthesis of Well-Dispersed Hollow TiO2 Spheres via Ostwald Ripening: Process, Mechanism, and Photocatalytic Performance
	Y. Liu; Q. Li; S. A. Gao; J. K. Shang
	2013
发表期刊	Journal of the American Ceramic Society
ISSN	0002-7820
卷号	96 期号:5 页码:1421-1427
摘要	Well-dispersed hollow TiO2 spheres were synthesized via Ostwald ripening through a fluorine-free solvothermal process in a n-PrOH/H2O mixed solvent. Several commonly used acids, such as HNO3, HCl, and H2SO4, were found to be effective as the ripening-directing agent to replace the highly corrosive HF, and the hollow TiO2 sphere size could be modulated by varying the reactant concentrations. The effects of the solvents and reactants were explored in details, which demonstrated that four important criteria existed in this fluorine-free process to create well-dispersed hollow TiO2 spheres, including the utilization of n-PrOH/H2O mixed solvent, certain degree of acidity, coexistence of different acids, and the existence of SO42 in the reaction solution. After calcination for a better crystallization, these hollow TiO2 spheres were composed of pure anatase phase, and had a good photocatalytic degradation performance on RhB under UV illumination.
部门归属	[liu, yang ; li, qi ; gao, shian ; shang, jian ku] chinese acad sci, shenyang natl lab mat sci, inst met res, environm funct mat div, shenyang 110016, peoples r china. [shang, jian ku] univ illinois, dept mat sci & engn, urbana, il 61801 usa. ; li, q (reprint author), chinese acad sci, shenyang natl lab mat sci, inst met res, environm funct mat div, shenyang 110016, peoples r china. ; qili@imr.ac.cn
关键词	Template-free Synthesis Fabrication Transformation Microspheres Nanospheres Nanostructures Aggregation Water
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/71382
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Liu,Q. Li,S. A. Gao,et al. Fluorine-Free Synthesis of Well-Dispersed Hollow TiO2 Spheres via Ostwald Ripening: Process, Mechanism, and Photocatalytic Performance[J]. Journal of the American Ceramic Society,2013,96(5):1421-1427.
APA	Y. Liu,Q. Li,S. A. Gao,&J. K. Shang.(2013).Fluorine-Free Synthesis of Well-Dispersed Hollow TiO2 Spheres via Ostwald Ripening: Process, Mechanism, and Photocatalytic Performance.Journal of the American Ceramic Society,96(5),1421-1427.
MLA	Y. Liu,et al."Fluorine-Free Synthesis of Well-Dispersed Hollow TiO2 Spheres via Ostwald Ripening: Process, Mechanism, and Photocatalytic Performance".Journal of the American Ceramic Society 96.5(2013):1421-1427.