自组装合成微纳结构CeO_2-NiO花球及光催化性能研究  被引量:3

Self-assembly Synthesis and Photocatalytic Performance of Micro-/nano-Structures CeO_2-NiO Spheres

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作  者:宋伟明[1] 马帅[1] 孙晶晶[1] 图亚拉 刘鹏[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:《人工晶体学报》2015年第2期480-486,共7页Journal of Synthetic Crystals

基  金:黑龙江省自然科学基金(B201010);黑龙江省教育厅面上项目(12511595)

摘  要:采用阳离子表面活性剂十六烷基三甲基溴化铵(CTAB)和阴离子表面活性剂十二烷基苯磺酸钠(SDBS)复配形成的囊泡相自组装合成了微纳结构Ce O2-Ni O花球,考察了不同Ce/Ni摩尔比对花球微纳结构的影响以及不同微纳结构Ce O2-Ni O花球的光催化性能。结果表明:在n(Ce)∶n(Ni)为4至1范围内,均可形成Ce O2-Ni O微纳结构花球,晶体均保持Ce O2萤石结构特征。当n(Ce)∶n(Ni)=2∶1时,75 nm左右的纳米粒子有序排列组成厚度大约为140 nm花瓣,花瓣有序堆积成9μm左右Ce O2-Ni O花球。在紫外光照射下,Ce O2-Ni O微纳结构花球(n(Ce)∶n(Ni)=2∶1)在150 min时间内对活性艳红降解率为95.93%。Micro-/nano-structures CeO_2-NiO spheres were synthesized using anionic and cationic surfactant self-assembly as soft template. The CeO_2-NiO spheres' structure and catalytic activity were elaborately studied by varying the mole ratio of Ce and Ni. Both samples were characterized by XRD, SEM, TEM and XPS, the results reveal a variety of CeO_2-NiO spheres with different Ce/Ni molar ratios (n(Ce): n(Ni) = 1: 1, 2: 1, 3: 1, 4: 1) were prepared by self-assembly method, and all the catalysts provided typical diffraction patterns for the CeO2 fluorite structure characteristics. Micro-/nano-structues CeO_2-NiO ( n ( Ce ) : n ( Ni ) = 2 : 1 ) spheres ( around 9 μm ) shows a typical flowerlike hierarchical strueture, which is composed of ~ 140 nm petals (nanoribbons). The petals were found to be assemblies of ~ 75 nm nanoparticles. The CeO_2-NiO ( n (Ce) : n (Ni) = 2:1 ) microspheres has a better morphology, crystal configuration, photo-catalytic degradation performanee for reactive brilliant red under ultraviolet light.

关 键 词:自组装 软模板法 光催化 微纳结构 CeO:一NiO 

分 类 号:O643[理学—物理化学]

 

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