硫化钨纳米花的制备及其在染料降解中的应用

以钨酸钠、硫脲、草酸为原料,采用水热法制备出由纳米薄膜组装而成的WS_2纳米花(WS_2NF)。反应过程中,硫脲的包覆作用和草酸的偶联作用,协同控制WS_2的增长,最终形成花瓣状结构。所制备的WS_2NF具有形变能力强、机械能捕获面积大、传质效率高和活性位点丰富的优点,有效提高了WS_2材料的压电催化性能,在5min内可将难降解有机染料完全降解,且该材料多次重复使用后依然保持高活性。

Preparation of Tungsten Disulfide and Its Application in Dye Degradation

Tungsten disulfide nanoflowers(WS2NF) with nanosheets was prepared by hydrothermal method applying sodium tungstate, thiourea and oxalic acid as raw materials. Capping effects of thiourea and coupling effects of oxalic acid synergistically controlled growth of WS2, which resulted in flower-like structure. WS2NF prepared with this process has advantages of excellent flexibility, large area for mechanical energy capture, high mass transfer efficiency and rich active sites. These greatly improve piezo-degradation activity of WS2 materials. The results show that refractory organics dyes can be completely degraded within 5 min with WS2NF as catalyst, and high activity remained after several recycles.