Porous cerium dioxide hollow spheres and their photocatalytic performance

Uniform-sized and monodiperse cerium dioxide porous hollow spheres (CeO2-PH) based on the Ostwald ripening process were fabricated by a simple solvothermal method in the absence of any templates.

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Preparation of hollow Fe3O4 spheres through a facile method and their applications

Functional Materials Letters ◽

10.1142/s1793604717500758 ◽

2017 ◽

Vol 10 (06) ◽

pp. 1750075 ◽

Cited By ~ 2

Author(s):

Xingping Wu ◽

Aiping Zhu ◽

Zhaodong Nan

Keyword(s):

Saturation Magnetization ◽

Ostwald Ripening ◽

Solvothermal Method ◽

Hollow Spheres ◽

Hollow Structure ◽

Solid Sphere ◽

Small Particles ◽

Potential Applications ◽

One Step ◽

Solid Spheres

Fe3O4 hollow microspheres with good dispersibility and high saturation magnetization were synthesized through a facile one-step solvothermal method. The formation mechanism of the hollow structure was studied by taking time-dependent experiments. Porous [Formula: see text]-FeOOH and [Formula: see text]-Fe2O3 nanosheets were firstly fabricated. Fe3O4 solid spheres aggregated by small particles were obtained from the transition of [Formula: see text]-FeOOH and [Formula: see text]-Fe2O3. Finally, the solid sphere is transferred to hollow sphere through Ostwald ripening. The maximum saturation magnetization of the hollow spheres is [Formula: see text][Formula: see text]emu/g, which is higher than some results reported in references. The Fe3O4 hollow spheres show potential applications in microwave absorption and photocatalysis.

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An unusual temperature gradient crystallization process: facile synthesis of hierarchical ZnO porous hollow spheres with controllable shell numbers

CrystEngComm ◽

10.1039/c4ce00735b ◽

2014 ◽

Vol 16 (34) ◽

pp. 7933-7941 ◽

Cited By ~ 17

Author(s):

Xiaoming Ma ◽

Xiaoting Zhang ◽

Lin Yang ◽

Kui Wang ◽

Kai Jiang ◽

...

Keyword(s):

Temperature Gradient ◽

Crystallization Process ◽

Ostwald Ripening ◽

Hollow Spheres ◽

Crystallization Mechanism ◽

Facile Synthesis ◽

Ripening Process ◽

Inside Out

Three types of hierarchical ZnO porous hollow spheres with controllable shell numbers were synthesized through not only the inside-out Ostwald ripening process but also an unusual temperature gradient crystallization mechanism.

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Formation of CdMoO4 porous hollow nanospheres via a self-assembly accompanied with Ostwald ripening process and their photocatalytic performance

CrystEngComm ◽

10.1039/c3ce41562g ◽

2013 ◽

Vol 15 (39) ◽

pp. 8014 ◽

Cited By ~ 36

Author(s):

Wen-Shou Wang ◽

Liang Zhen ◽

Cheng-Yan Xu ◽

Wen-Zhu Shao ◽

Zhong-Lin Chen

Keyword(s):

Self Assembly ◽

Photocatalytic Performance ◽

Ostwald Ripening ◽

Hollow Nanospheres ◽

Ripening Process

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

Journal of the American Ceramic Society ◽

10.1111/jace.12311 ◽

2013 ◽

Vol 96 (5) ◽

pp. 1421-1427 ◽

Cited By ~ 16

Author(s):

Yang Liu ◽

Qi Li ◽

Shian Gao ◽

Jian Ku Shang

Keyword(s):

Photocatalytic Performance ◽

Ostwald Ripening ◽

Ripening Process ◽

Process Mechanism

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Effect of Reaction Time on Microwave Absorption Properties of Fe3O4 Hollow Spheres Synthesized via Ostwald Ripening

Materials ◽

10.3390/ma12182921 ◽

2019 ◽

Vol 12 (18) ◽

pp. 2921 ◽

Cited By ~ 1

Author(s):

Wei Huang ◽

Yujiang Wang ◽

Shicheng Wei ◽

Bo Wang ◽

Yi Liang ◽

...

Keyword(s):

Reaction Time ◽

Microwave Absorption ◽

Ostwald Ripening ◽

Impedance Matching ◽

Hollow Spheres ◽

Absorption Properties ◽

Microwave Absorption Properties ◽

Magnetic Structures ◽

Absorption Performance ◽

Microwave Absorption Performance

Hollow magnetic structures have great potential to be used in the microwave absorbing field. Herein, Fe3O4 hollow spheres with different levels of hollowness were synthesized by the hydrothermal method under Ostwald ripening effect. In addition to their microstructures, the microwave absorption properties of such spheres were investigated. The results show that the grain size and hollowness of Fe3O4 hollow spheres both increase as the reaction time increases. With increasing hollowness, the attenuation ability of electromagnetic wave of Fe3O4 spheres increases first and then decreases, finally increases sharply after the spheres break down. Samples with strong attenuation ability can achieve good impedance matching, which it does preferentially as the absorber thickness increases. Fe3O4 hollow spheres show the best microwave absorption performance when the reaction time is 24 h. The minimum reflection loss (RL (min)) can reach −40 dB, while the thickness is only 3.2 mm.

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