As an important II-VI semiconductor with wide band gap, ZnS has been attracting extensive attention and has been applied in photocatalysis, optoelectronic devices, and sensors due to its unique optical and electrical properties [
1-
3]. Various methods had been used to synthesize nanostructural ZnS. For example, ZnS nanoporous nanoparticles were prepared by solution-phase thermal decomposition route using zinc acetate and thiourea as Zn and S sources, respectively [
4]. ZnS nanotubes were self-assembled via a thermochemistry process using ZnS powers as precursors [
5]. Owing to the fast generation of electron-hole pairs in photocatalysis reaction, ZnS nanocrystals have been used as photocatalyst in photodegadation of organic pollutions [
4]. However, a problem is that the ZnS nanocrystals incline to agglomerate in solution and then affect the photocatalysis effection. Therefore, TiO
2, CuS and carbon nanotubes had been used as a support to enhance the photocatalytic activity [
6-
8]. Recently, we have prepared carboxyl modified amorphous carbon nanotubes (ACNTs) by a simple solvothermal method. Thanks to its large surface area, ACNTs were a good candidate for the support to keep the nanoparticles from agglomeration.