Ag nanoparticles/hematite mesocrystals superstructure composite: a facile synthesis and enhanced heterogeneous photo-Fenton activity

被引：45

作者：

Chen, Xianjie ^{[1
]}

Chen, Fangge ^{[1
]}

Liu, Fenglin ^{[1
]}

Yan, Xiaodong ^{[2
]}

Hu, Wei ^{[1
]}

Zhang, Ganbing ^{[1
]}

Tian, Lihong ^{[1
,2
]}

Xia, Qinghua ^{[1
]}

Chen, Xiaobo ^{[2
]}

机构：

[1] Hubei Univ, Hubei Collaborat Innovat Ctr Adv Organochem Mat, Minist Of Educ, Key Lab Synth & Applicat Organ Funct Mol, Wuhan 430062, Peoples R China

[2] Univ Missouri, Dept Chem, Kansas City, MO 64110 USA

来源：

CATALYSIS SCIENCE & TECHNOLOGY | 2016年 / 6卷 / 12期

基金：

中国国家自然科学基金;

关键词：

PHOTOCATALYTIC PROPERTIES; HEMATITE MESOCRYSTALS; ALPHA-FE2O3; WATER; DEGRADATION; EFFICIENT; CATALYST; NANOSTRUCTURES; OXIDATION; MECHANISM;

D O I：

10.1039/c6cy00080k

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Mesocrystals, as a new class of crystals, compared to the more common single crystals and polycrystalline systems, have attracted unparalleled attention owing to their unique ordered superstructure. Herein, uniform, highly crystalline, nanoporous and cocoon-like hematite mesocrystals have been fabricated through a facile template-free approach in benzyl alcohol. They showed a relatively large surface area of 18.8 m2 g(-1) and an average pore size of 3.67 nm, which was within the range of hole diffusion lengths (2-4 nm) of alpha-Fe2O3. The loading of Ag nanoparticles on the alpha-Fe2O3 mesocrystals had no distinct effect on the surface area and pore distribution. The results of photoluminescence and photoelectrochemical measurements indicated that the synergistic effect of the suitable pore size and Ag nanoparticles resulted in effective charge carrier transfer. Thus, the Ag/hematite mesocrystal composites displayed high photo-Fenton activity in the oxidation of Rhodamine B, methyl orange and glyphosate under visible light.

引用

页码：4184 / 4191

页数：8

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