pH值调节方式对LAB辅助合成纳米Cu_2O微球的影响与组装机理  

Influence of pH Adjustment Modes on LAB Assisted-Synthesis of Cu_2O Nanospheres and Self-assembly Mechanism

作　　者：殷广明[1] 张转芳[1] 宋坤[1] 辛建娇[1] 孙立[1] 

机构地区：[1]齐齐哈尔大学化学与化学工程学院,齐齐哈尔161006

出　　处：《无机化学学报》2016年第5期799-805,共7页Chinese Journal of Inorganic Chemistry

基　　金：黑龙江省自然科学基金(No.B201312);国家自然科学基金青年项目(No.201501104)资助项目

摘　　要：以Cu(Ac)2为原料,两性表面活性剂月桂酰胺丙基甜菜碱(LAB)为模板,采用两种不同的调节pH值方式制备了Cu_2O纳米材料。表征结果表明两种调节pH值方式均可获得Cu_2O纳米微球,并都呈立方晶相,而且样品的红外吸收峰、固体紫外吸收峰都不同程度的发生了蓝移;第一种Cu_2O纳米微球由针状纳米粒子积聚而成,针状纳米粒子间空隙孔径主要分布在25~50 nm之间,比表面积为22 m^2·g^(-1),禁带宽度为2.15 eV;第二种Cu_2O纳米微球由小的纳米球状体堆积而成,球状体间孔道直径集中在25~50 nm和50~125 nm两个区域,比表面积为9 m^2·g^(-1),禁带宽度为2.46 eV。两种不同的调节pH值方式获得的Cu_2O纳米微球,其反应历程和自组装机理存在不同。By two different ways of adjusting the pH value, Cu2O nanomaterials was prepared with Cu（Ac）2 as raw material and the ampholytic surfactant N-（3-Cocoamidopropyl）-N,N-dimethyl-N-earboxymethyl ammonium betaine （LAB） as the template. The characterization results show that Cu2O nanometer materials obtained by two kinds of adjusting pH value belong to cubic phase, and morphology is nanospheres. In the IR and UV-Vis DRS spectra, there are different degree of blue shift of the infrared and ultraviolet absorption peak of Cu2O nanosphere separately. The first kind of Cu2O nanosphere is composed of acicular nanoparticles, and the size of Nanometer pore between nanoparticles is mainly distributed in 25-50 nm; the specific surface area is 22 m^2·g^-1; the band gap is 2.15 eV. The second kind of Cu2O nanospheres assembles from smaller nano-structrue globules; the size of nanometer channel among smaller nano-structrue globules are 25-50 nm and 50-125 nm; the specific surface area is 9 m^2·g^-1; the band gap is 2.46 eV. There are different reaction mechanism and the self-assembly mechanism of Cu2O nanospheres obtained by two different ways of adjusting pH value.

关 键 词：LAB两性表面活性剂 Cu2O纳米微球 pH值调节 组装机理 

分 类 号：O614.411[理学—无机化学]