不同胺模板剂合成有孔硫化锌纳米空球

Synthesis of ZnS hollow nanospheres with different amine templates

采用乙二胺、1，3-丙二胺、丁胺和β-羟乙基乙二胺等不同胺为模板剂，它们与CS2反应生成的H2S为硫源，在50℃与ZnSO4搅拌反应20min制备了有孔的ZnS纳米空球．用SEM和TEM表征了有孔ZnS纳米空球的形貌、粒子大小为100～850nm以及孔的大小为150～600nm，XRD和HRTEM阐明了其为B型立方晶系，并由2～5nm的ZnS纳米晶构成，UV—vis最大吸收峰蓝移表明其具有一定的量子尺寸效应．胺模板剂的两个氨基有利于与Zn^2＋作用而形成均匀、相对光滑的有孔ZnS纳米空球，引入羟乙基则不利，提出了由H2S冲出形成孔的合理机理．

The ZnS hollow nanospheres with holes were prepared by reacting ZnSO4 with H2S, the sulfide source, formed in the reaction of CS2 with ethylenediamine, 1,3-propylenediamine, hutylamine or 2-（2-Aminoethylamino） ethanol, which acted as template agent also, at 50 ℃ under agitating. The shape, particle size of about 100 ～ 850 nm and hole size of about 150 ～ 600 nm of ZnS hollow nanospheres with holes were shown by SEM and TEM images. These ZnS nanospheres with β cubic ZnS phase and composed by 2 ～ 5 nm of nanocrystals were proved by XRD and HRTEM. The blue shift of λmax in UV-vis displayed the effect of quantum size. The two aminos of amine template favor to act with Zn^2＋ form uniform and relatively smooth ZnS holey nanospheres, while hydroxyethyl took disadvantage. Reasonable mechanism of hole by H2S rushing out was suggested.