摘要
以硫代硫酸钠和乙酸锌为反应物、柠檬酸为调控剂,在紫外光辐照下制备出单分散的ZnS纳米颗粒。采用XRD、TEM、低温氮吸附-脱附、HRTEM和EDS等方法研究了反应物浓度、辐照时间和柠檬酸用量等因素对产物颗粒尺寸和分布的影响。结果表明,随着反应时间延长,产物收率增高,平均晶粒度增大,比表面积变小。反应物浓度对产物组成和比表面积有较大影响,但对产物的平均晶粒度影响不大。适量添加柠檬酸,有利于制备单分散的ZnS纳米颗粒。
Monodispersed ZnS nanoparticles were prepared under ultraviolet irradiation by using Na2S2O3·5H2O and Zn（CH3COO）2H2O as reactants,citric acid as controlling agent.The as-prepared samples were characterized by means of XRD,transmission electron microscopy（TEM）,low temperature N2 adsorption-desorption,high-resolution transmission electron microscopy（HRTEM） and energy dispersive X-ray spectroscopy（EDS）.The results show that with prolonging the reaction time the ZnS yield and average particle size increase while the specific surface area decreases.The reactant concentrations have significant influence on the composition and specific surface area of the samples,but little influence on their average size.Employing appropriate amount of citric acid in the reactant solution is favorable to the formation of monodispersed ZnS nanoparticles.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2008年第7期1084-1088,共5页
Chinese Journal of Inorganic Chemistry
关键词
ZNS
单分散纳米颗粒
紫外辐照
zinc sulfide,monodispersed nanoparticle,ultraviolet irradiation
