Zuniga Jose P, Abdou Maya, Gupta Santosh K, Mao Yuanbing
Department of Chemistry, University of Texas Rio Grande Valley.
Department of Chemistry, University of Texas Rio Grande Valley; Radiochemistry Division, Bhabha Atomic Research Centre.
J Vis Exp. 2018 Oct 27(140):58482. doi: 10.3791/58482.
The development of feasible synthesis methods is critical for the successful exploration of novel properties and potential applications of nanomaterials. Here, we introduce the molten-salt synthesis (MSS) method for making metal oxide nanomaterials. Advantages over other methods include its simplicity, greenness, reliability, scalability, and generalizability. Using pyrochlore lanthanum hafnium oxide (La2Hf2O7) as a representative, we describe the MSS protocol for the successful synthesis of complex metal oxide nanoparticles (NPs). Furthermore, this method has the unique ability to produce NPs with different material features by changing various synthesis parameters such as pH, temperature, duration, and post-annealing. By fine-tuning these parameters, we are able to synthesize highly uniform, non-agglomerated, and highly crystalline NPs. As a specific example, we vary the particle size of the La2Hf2O7 NPs by changing the concentration of the ammonium hydroxide solution used in the MSS process, which allows us to further explore the effect of particle size on various properties. It is expected that the MSS method will become a more popular synthesis method for nanomaterials and more widely employed in the nanoscience and nanotechnology community in the upcoming years.
开发可行的合成方法对于成功探索纳米材料的新特性和潜在应用至关重要。在此，我们介绍一种用于制备金属氧化物纳米材料的熔盐合成（MSS）方法。与其他方法相比，其优点包括简单、绿色、可靠、可扩展和具有通用性。以焦绿石型氧化镧铪（La2Hf2O7）为代表，我们描述了成功合成复杂金属氧化物纳米颗粒（NP）的MSS方案。此外，该方法具有独特的能力，通过改变各种合成参数（如pH值、温度、持续时间和退火后处理）来制备具有不同材料特性的NP。通过微调这些参数，我们能够合成高度均匀、无团聚且高度结晶的NP。作为一个具体例子，我们通过改变MSS过程中使用的氢氧化铵溶液的浓度来改变La2Hf2O7 NP的粒径，这使我们能够进一步探索粒径对各种性能的影响。预计MSS方法将成为一种更受欢迎的纳米材料合成方法，并在未来几年在纳米科学和纳米技术领域得到更广泛的应用。
