One-Pot Synthesis of Uniform Cu2O and CuS Hollow Spheres and Their Optical Limiting Properties

被引：202

作者：

Gao, Jining ^{[1
]}

Li, Quanshui ^{[2
]}

Zhao, Huabo ^{[1
]}

Li, Lianshan ^{[1
]}

Liu, Chunling ^{[2
]}

Gong, Qihuang ^{[2
]}

Qi, Limin ^{[1
]}

机构：

[1] Peking Univ, Beijing Natl Lab Mol Sci, State Key Lab Struct Chem Unstable & Stable Speci, Coll Chem, Beijing 100871, Peoples R China

[2] Peking Univ, Sch Phys, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China

来源：

CHEMISTRY OF MATERIALS | 2008年 / 20卷 / 19期

关键词：

D O I：

10.1021/cm801407q

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Uniform hollow spheres of Cu2O and CuS were successfully synthesized by chemical transformation of in situ formed sacrifical templates containing Cu(I) in aqueous solutions. The shell thickness of these hollow spheres can be adjusted through the choice of the bromide source used for the formationo of intermediate templates. Specifically, thick-shell hollow spheres (about 130-180 nm in shell thickness) were obtained by using CuBr solid spheres as the templates, which were formed by the reduction of CuBr2 with ascorbic acid; on the other hand, thin-shell hollow spheres (about 20-25 nm in shell thickness) were obtained by using spherical aggregates consisting of the Cu+, Br-, and (C4H9)(4)N+ ions as the templates, which were formed by the reduction CuCl2 with ascorbic acid in the presence of (C4H9)NBr. In both the cases, crystalline Cu2O hollow spheres were directly obtained at room temperature, while amorphous Cu2S hollow sphere were first obtained at room temperature and transformed into well crystallized CuS hollow spheres after a hydrothermal treatment at 160 degrees C. the optical limiting properties of the thin-shell hollow spheres of Cu2O and CuS were characterized by using nanosecond laser pulses. Strong optical limiting responses were detected for both the Cu2O and CuS hollow spheres, which make these semiconductor hollow spheres promising material for applications in the protection of human eyes or optical sensors from high-power laser irradiation.

引用

页码：6263 / 6269

页数：7

共 55 条

[1] High symmetric 18-facet polyhedron nanocrystals of Cu7S4 with a hollow nanocage [J].