钛酸盐纳米管与二硫化碳修饰钛酸盐纳米管的合成、表征及其去除重金属离子性能

在水热法制备钛酸盐纳米管的基础上, 通过形成黄原酸基反应合成了CS2修饰的钛氧纳米管. 采用粉末X射线衍射(XRD)、透射电镜(TEM)、红外光谱(FTIR)和拉曼光谱(Raman)等技术对产物进行了表征. 以水溶液中铅离子、铜离子和银离子作为目标重金属离子, 分别用纯钛酸盐纳米管和CS2修饰后的钛氧纳米管对其进行反应和吸附, 通过一系列对比性实验, 评价了不同形式纳米管去除重金属的能力. 实验结果表明, 与文献报道的吸附剂对重金属离子的吸附量相比, 纯钛酸盐纳米管和CS2修饰的钛氧纳米管吸附重金属离子的容量非常大, 尤其是经CS2修饰后的钛氧纳米管去除铅离子的能力明显增强, 它们去除重金属离子的能力还与重金属盐的阴离子、溶液的pH值相关. 在相同的pH条件下, 钛酸盐纳米管去除铅离子、铜离子和银离子的能力分别为599.37, 163.22和474.73 mg/g; CS2修饰的钛氧纳米管去除铅离子、铜离子和银离子的能力分别为663.37, 160.21和423.05 mg/g.

Synthesis and Characterization of Titanate and CS2-modified Titanate Nanotubes as Well as Their Adsorption Capacities for Heavy Metal Ions

CS_2-modified titanate nanotubes were synthesized by tubular titanate precursor via hydrothermal method.They were characterized with XRD,EDAX,TEM and Raman spectra.Adsorption capacity of the nanotubes for heavy metal ions,such as Cu2 ,Pb2 and Ag ions in water were also evaluated.Compared with ordinary sorbents,the nanotubes' adsorption performance are much better.The nanotubes' adsorption capacities increase apparently after being modified by CS2,and their adsorption performance is related to the anions and pH value of the solution.The adsorption capacities of pure titanate nanotubes for Pb2 ,Ag and Cu2 ions are 599.37,163.22 and 474.73 mg/g,respectively.After being modified by CS2,the adsorption capacities of the nanotubes changed to 663.37,160.21 and 423.05 mg/g,respectively.