Polyaniline-modified 3D-flower-like molybdenum disulfide composite for efficient adsorption/photocatalytic reduction of Cr(VI)

Polyaniline (PANI) was modified onto 3D flower-like molybdenum disulfide (MoS2) to prepare a novel organic-inorganic hybrid material, PANI@MoS2. PANI@MoS2 was characterized by scanning and transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction and thermogravimetric analysis. The results indicate that PANI was modified onto MoS2. PANI@MoS2 was applied as an adsorbent to remove Cr(VI) from aqueous solutions, and the adsorption isotherms fit well to the Langmuir model; the maximum removal capacity of Cr(VI) by PANI@MoS2 was 526.3 and 623.2 mg/g at pH 3.0 and 1.5, respectively. PANI@MoS2 exhibited an enhanced removal capacity of Cr(VI) in comparison with bare MoS2 and other adsorbents. The adsorption of Cr(VI) on PANI@MoS2 might be attributed to the complexation between the amine and imine groups on the surface of PANI@MoS2 with Cr(VI). This study implies that the hybrid material PANI@MoS2 is a potential adsorbent for Cr(VI) removal from large volumes of aqueous solutions. (C) 2016 Elsevier Inc. All rights reserved.

聚苯胺（PANI）被修饰到三维花状二硫化钼（MoS₂）上，制备了一种新型有机 - 无机杂化材料PANI@MoS₂。通过扫描电子显微镜、透射电子显微镜、傅里叶变换红外光谱、X射线衍射和热重分析对PANI@MoS₂进行了表征。结果表明聚苯胺被修饰到了MoS₂上。PANI@MoS₂被用作吸附剂从水溶液中去除Cr(VI)，吸附等温线很好地符合朗缪尔模型；在pH为3.0和1.5时，PANI@MoS₂对Cr(VI)的最大去除量分别为526.3和623.2 mg/g。与纯MoS₂和其他吸附剂相比，PANI@MoS₂对Cr(VI)表现出更强的去除能力。Cr(VI)在PANI@MoS₂上的吸附可能归因于PANI@MoS₂表面的胺基和亚胺基与Cr(VI)之间的络合作用。这项研究表明杂化材料PANI@MoS₂是一种从大量水溶液中去除Cr(VI)的潜在吸附剂。（C）2016爱思唯尔公司。保留所有权利。