静电纺丝制备MoS_2/TiO_2复合纳米纤维材料

Preparation of MoS_2/TiO_2Nanofiber Based on Electrospinning Technology

以TiO_2和MoS_2为基底的纳米材料在太阳能电池、光电开关、光催化等方面应用广泛,但是单纯的TiO_2和MoS_2纳米材料还有诸多不足,例如:光致电子和空穴对的转移速度慢,复合率高,导致光催化量子效率低.因此本文通过静电纺丝技术合成TiO_2/MoS_2复合纳米材料,以改善单一纳米材料的不足.首先,通过超声的方法将多层片状的MoS_2固体粉碎变成小片、单层结构,之后加入TiO_2的静电纺丝前体溶液中,通过调控静电纺丝的参数,得到MoS_2在TiO_2纳米管分散的纳米纤维结构.通过调节MoS_2浓度,可以有效改善复合材料的形貌,并进一步利用XRD、TEM、SEM、IR等方法对TiO_2/MoS_2复合纳米材料进行详细表征.本文所制备的纳米复合材料,MoS_2均匀镶嵌在TiO_2内部,不易脱落,结构稳定,将在太阳能电池、光电开关、光催化等方面有潜在的应用价值.

Nano-materials based on TiO 2 and MoS 2 have been widely used in solar cells,photoelectric switches and photocatalysis.However,the pure TiO 2 and MoS 2 nano-materials have many disadvantages,such as the slow transfer rate of photoinduced electron and hole pairs,the high recombination rate,and the low quantum efficiency of photocatalysis.Herein,TiO 2 /MoS 2 composite nanomaterials were synthesized by electrospinning technology in order to improve the shortage of single nanomaterials.First of all,the multilayer flake MoS 2 solid was crushed into small pieces and single layer structure by ultrasonic method,and then the nano fiber structure of MoS 2 dispersed in TiO 2 nanotubes was obtained by adding the precursor solution of TiO 2 electrospinning and adjusting the parameters of electrospinning.The morphology of the composite could be improved by adjusting the concentration of MoS 2 ,and the composite was characterized by XRD,TEM,SEM and IR.The prepared nano-composite MoS 2 is embedded in the TiO 2 homogeneously,which is not easy to fall off and has stable structure,and it will have potential application value in solar cell,photoelectric switch and photocatalysis.