Mesoporous Nickel Ferrites with Spinel Structure Prepared by an Aerosol Spray Pyrolysis Method for Photocatalytic Hydrogen Evolution

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• 作者：Dachao Hong ; Yusuke Yamada ; Margaret Sheehan ; Shinya Shikano ; Chun-Hong Kuo ; Ming Tian ; Chia-Kuang Tsung ; Shunichi Fukuzumi
• 刊名：ACS Sustainable Chemistry & Engineering
• 出版年：2014
• 出版时间：November 3, 2014
• 年：2014
• 卷：2
• 期：11
• 页码：2588-2594
• 全文大小：388K
• ISSN：2168-0485

文摘

Submicron-sized mesoporous nickel ferrite (NiFe₂O₄) spheres were prepared by an aerosol spray pyrolysis method using Pluronic F127 as a structure-directing agent, and their photocatalytic performance for hydrogen (H₂) evolution was examined in an aqueous MeOH solution by visible light irradiation (位 > 420 nm). The structure of the spherical mesoporous nickel ferrites was studied by transmission electron microscopy, powder X-ray diffraction, and N₂ adsorption鈥揹esorption isotherm measurements. Mesoporous NiFe₂O₄ spheres of high specific surface area (278 m² g^鈥?) with a highly crystalline framework were prepared by adjusting the amount of structure-directing agent and the calcining condition. High photocatalytic activity of mesoporous NiFe₂O₄ for H₂ evolution from water with methanol was achieved due to the combination of high surface area and high crystallinity of the nickel ferrites.

Keywords:

Nickel ferrite; Hydrogen evolution; Photocatalysis; Metal oxide sphere; Crystallinilty; Surface area; Ramp rate