碳纳米管用氨水、乙二胺四乙酸(EDTA)进行表面改性, 然后通过硫代乙酰胺、醋酸锌、水和表面改性的碳纳米管在水浴超声条件下发生溶液化学反应, 在碳纳米管表面包裹了一层分布均匀、致密的ZnS纳米晶粒. 用XRD、TEM、SAED、SEM、FTIR、PL等表征手段对材料进行了结构及性能表征. 研究结果表明: 对碳纳米管进行乙二胺四乙酸处理是实现ZnS纳米晶粒在碳纳米管表面均匀、致密包裹的重要因素, 碳纳米管/ZnS复合材料的光致发光性较之相同方法合成的ZnS, 俘获态发射峰蓝移6nm, 而能带边缘发射峰蓝移16nm. 通过对FTIR及不同表面改性碳纳米管的对比试验研究, 给出了碳纳米管/ZnS复合材料的形成机理.
Carbon nanotubes were modified by NH3·H2O and EDTA, respectively. Then, ZnS nanoparticles were densely and
uniformly coated on modified surfaces of carbon nanotubes through reaction of thioacetamide and zinc acetate in water solution. The samples were characterized by XRD, TEM, SAED, SEM, FTIR and PL spectroscope. Experimental results indicate
that EDTA treatment of the carbon nanotubes is a key factor for the formation of carbon nanotubes/ZnS composite. The PL spectra show that the photoluminescence peaks of the carbon nanotubes/ZnS composite have a small blue shift in comparison with the as-prepared ZnS. A possible formation mechanism is proposed for the carbon nanotubes/ZnS composite．
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