Enhanced photocatalytic performance of ZnSe/PANI nanocomposites for degradation of organic and inorganic pollutants

被引：71
作者：
Shirmardi, Abbas [1 ]
Teridi, Mohd Asri Mat [2 ]
Azimi, H. R. [3 ]
Basirun, Wan Jeffrey [4 ]
Jamali-Sheini, Farid [5 ]
Yousefi, Ramin [3 ]
机构：
[1] IAU, Masjed Soleiman Branch, Dept Chem, Masjed Soleiman, Iran
[2] Univ Kebangsaan Malaysia, Solar Cell Res Inst SERI, Res Complex, Bangi 43600, Selangor, Malaysia
[3] IAU, Masjed Soleiman Branch, Dept Phys, Masjed Soleiman, Iran
[4] Univ Malaya, Dept Chem, Kuala Lumpur 50603, Malaysia
[5] Islamic Azad Univ, Ahvaz Branch, Dept Phys, Adv Surface Engn & Nano Mat Res Ctr, Ahvaz, Iran
来源：
APPLIED SURFACE SCIENCE | 2018年 / 462卷
关键词：
ZnSe/PANI nanocomposites; Type-II heterojunction; Optical properties; Photocatalytic performance; TIO2-GRAPHENE HYDROGEL; BISPHENOL-A; UV-LIGHT; REMOVAL; NANOPARTICLES; POLYANILINE; ADSORPTION; PHOTOSENSITIZATION; PHOTODEGRADATION; PANI/TIO2;
D O I：
10.1016/j.apsusc.2018.06.252
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Current work presents a study about the effect of polyaniline (PANI) as an organic semiconductor on the photocatalytic performance of ZnSe nanoparticles (NPs). Pristine ZnSe NPs and ZnSe/PANI nanocomposites were synthesized by a simple and cost-effective co-precipitation method in the ambient conditions. X-ray diffraction (XRD), Raman, and Fourier-transform infrared spectroscopy (FTIR) results confirmed that, a heterojunction was created by ZnSe NPs and PANI composite. High-resolution transmission electron microscopy (HRTEM) image showed that the NPs were deposited by PANI completely and a core-shell structure was generated by ZnSe and PANI. Photoluminescence (PL) spectroscopy results showed the optical properties of the pristine ZnSe NPs and ZnSe/PANI nanocomposites were similar with lower defect emission intensity for the ZnSe/PANI nanocomposites. However, the PL and UV-Vis results revealed that, the PANI caused a decrease in band-gap value of the ZnSe/PANI nanocomposites in compared to the band-gap value of the pristine ZnSe NPs. In addition, X-ray photoelectron spectroscopy (XPS) results indicated that, the PANI caused a shift in the valance band (VB) and conduction band (CB) edges of ZnSe/PANI nanocomposites in compared with pristine ZnSe NPS. Finally, the photocatalytic performance of the products for removing of methylene blue (MB) and chromate ions was examined under a visible-light source irradiation. An enhancement photocatalytic performance for ZnSe/PANI nanocomposites in compared to the pristine ZnSe NPs was observed. Brunauer-Emmett-Teller (BET) results indicated that textural properties of the nanocomposites were decreased by PANI. According to the optical properties and band gap-value of the products a type-II heterojunction was created by band alignment of the ZnSe and PANI and such heterojunction was the most important factor for the enhancement photocatalytic performance of the ZnSe/PANI nanocomposites in compared to the photocatalytic activity of the pristine ZnSe NPs.
引用
收藏
页码：730 / 738
页数：9
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