CdWO_4纳米棒的制备及光致发光性能

Hydrothermal synthesis of CdWO_4 nanorods and their photoluminescence properties

以Na2WO4.2H2O和CdCl2.2.5H2O为主要原料,以表面活性剂十二烷基苯磺酸钠(SDBS)为添加剂,水热反应合成了CdWO4纳米棒。用XRD、TEM、EDS、SAED等对产物进行了表征,初步探讨了CdWO4纳米棒的形成机理,测试了CdWO4纳米棒的光致发光(PL)谱。结果表明:产物为长0.8～1.5μm,直径40～120nm的CdWO4纳米棒;SDBS对CdWO4纳米棒的形成起了关键作用,浓度为0.01mol/L条件下制备的CdWO4纳米棒的长径比最大;随着Cd-WO4纳米棒长径比的增大,其PL光谱增强。

CdWO4 nanorods with wolframite structure were synthesized in presence of the surfactant of SDBS by a hydrothermal method, and characterized by XRD, TEM, EDS and SAED, then the PL spectra of the CdWO4 nanorods pre-pared under different conditions were tested. The results showed that the products were CdWO4 nanorods with length of 0. 8-1.5nm and width of 40-120nm. The surfactant SDBS plaied a key role in formation of the nanorods. The aspect ratio of the nanorods synthesized with 0. 01mol/L SDBS was maximum. The intensity of PL emissions of the samples was increased with increasing aspect ratio of the nanorods.