化学原位还原法制备石墨烯-铜纳米颗粒复合物

化学原位还原法制备石墨烯-铜纳米颗粒复合物

田  甜，田  楠，汪  涛，张  博，张丹丹，刘丹敏*

(北京工业大学固体微结构与性能研究所， 北京100124)

摘  要  石墨烯-铜纳米颗粒复合物具有良好的电导率、电催化活性和化学可修饰性，在电化学和生物传感器等方面有广泛的应用前景。本文采用水合肼和KBH₄原位化学还原氧化石墨烯和Cu²⁺混合溶液制备石墨烯-铜纳米颗粒复合物，结果表明：石墨烯-铜纳米颗粒复合物只有在碱性或中性溶液中才能制备成功，水合肼比KBH₄的还原效果好。水合肼还原后的石墨烯呈半透明薄纱状，铜纳米颗粒成功地、均匀地沉积在石墨烯纳米片上，独立存在不团聚，大小均匀，边长 ≈1 μm，呈三角形或者六边形纳米片，正六边形纳米片的{111}面、不规则六边形和三角形纳米片的{110}面平行于石墨烯的二维平面。

关键词  石墨烯-铜纳米颗粒；原位化学还原；透射电镜

中图分类号：O76；O69   文献标识码：A    doi:10.3969/j.issn.1000-6281.2016.05.005

In situchemical reduction method for graphene-copper nanoparticle composite

TIAN Tian，TIAN Nan，WANG Tao，ZHANG Bo，ZHANG Dan-dan，LIU Dan-min^*

(Institute of Microstructure and Property of Advanced Materials，Beijing University of Technology，Beijing 100124，China)

Abstract Graphene-copper nanoparticle compositehas broad application prospects in electrochemical biosensors owing to its good conductivity, electro-catalytic activity and chemical modification. In this paper, graphene-copper nanoparticle composite was prepared by in situ chemical reduction of a mixture containing graphene oxide and copper (II) ions using hydrazine hydrateor potassium borohydride as a reductant. It is revealed that graphene-copper nanoparticle composite can only successfully prepared in alkaline or neutral solution. Graphene reduced by hydrazine hydrate is translucent chiffon-like. Copper nanoparticles with a uniform size (side length ≈ 1 μm) are non-agglomerated triangular or hexagonal, and uniformly deposited on graphene nanosheets. {111} surface of hexagonal copper nano-sheets and {110} surface of triangular copper nano-sheets parallel to the graphene plane.

Keywords graphene-copper nanoparticle composite；in situchemical reduction method；transmission electron microscopy

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