Zhu Hongliang, Yang Deren, Yu Guixia, Zhang Hui, Jin Dalai, Yao Kuihong
Center of Materials Engineering, Zhejiang Sci-Tech University, Xiasha University Town, Hangzhou 310018, China.
J Phys Chem B. 2006 Apr 20;110(15):7631-4. doi: 10.1021/jp060304t.
Single crystalline Zn(2)SnO(4) (ZTO) nanorods 2-4 nm in diameter and around 20 nm in length were successfully synthesized by a simple hydrothermal process with use of hydrazine hydrate as an alkaline mineralizer instead of NaOH or NH(3).H(2)O. By analyzing the UV-vis diffuse reflectance spectrum, the optical band gap (E(g)) of the nanorods was found to be 3.87 eV, which indicates a blue shift of 0.27 eV from that of bulk ZTO (3.6 eV). In situ high-temperature X-ray diffraction was employed to study the thermal expansion coefficient and the variation of lattice parameter with temperature of the product. Furthermore, we discussed the chemical mechanism and key factors to the hydrothermal formation of the sub-5 nm ZTO nanorods.
通过简单的水热法，使用水合肼作为碱性矿化剂替代NaOH或NH₃·H₂O，成功合成了直径为2 - 4纳米、长度约为20纳米的单晶Zn₂SnO₄（ZTO）纳米棒。通过分析紫外可见漫反射光谱，发现纳米棒的光学带隙（E(g)）为3.87电子伏特，这表明相对于块状ZTO（3.6电子伏特）发生了0.27电子伏特的蓝移。采用原位高温X射线衍射研究了产物的热膨胀系数和晶格参数随温度的变化。此外，我们还讨论了亚5纳米ZTO纳米棒水热形成的化学机理和关键因素。
