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Synthesis and adsorption applications of PPY/Fe3O4 nanocomposite based material
Nano-Structures & Nano-Objects Pub Date : 2021-02-05 , DOI: 10.1016/j.nanoso.2021.100669
Naveen Chandra Joshi , Kirandeep Kaur , Neelam Kumar , Narendra Singh Bhandari , Abhishek Thakur

The present study deals with the synthesis of an efficient Polypyrrole/Fe3O4 (PPY/Fe3O4) nanocomposite based material and its utilisation in the adsorptive removal of Pb (II), Cd (II) and Zn (II) ions. The synthesised PPY/Fe3O4 nanocomposite based adsorbent has been characterised by means of FE-SEM (Field emission scanning electron microscope), EDX (Energy dispersive X-ray), P-XRD (Powder X-ray diffraction) and FTIR (Fourier transform infra-red) techniques. The characteristic FTIR peaks were found at 3427 cm−1, 1618 cm−1, 1395 cm−1, 1086 cm−1, 1180 cm−1, 525 cm1and 453 cm−1 and indicating the presence of N–H, C=N, C–O, C–N, C–C, C–Fe, Fe–O etc bonds on the surface of PPY/Fe3O4 nanocomposite. Adsorption of selected heavy metal ions on the surface of PPY/Fe3O4 was done by applying different adsorption parameters. The removal (%) of lead, cadmium and zinc ions was found to be 69.1%, 62.1% and 53.9% at 60 min, 54.9%, 51.9% and 36.9 at 1 g of PPY/Fe3O4 and 96.2%, 83.9% and 89.9% at pH 6, respectively. The suitability of adsorption process, mechanism and rate of adsorption has been observed using different isotherm and kinetic models. The maximum adsorption capacities (Kla) have been evaluated for lead, cadmium and zinc ions using Langmuir model as 11.350, 8.928 and 7.107 mg g−1, respectively. The values of pseudo first order rate constants (k1) for Pb (II), Cd (II) and Zn (II) ions on PPY/Fe3O4nanocomposite were found to be -0.644 min−1, -0.694 min1and -0.563 min−1, respectively. The pseudo second order rate constants were calculated for lead, cadmium and zinc ions as 1.122, 0.816 and 1.004 g mg−1 min−1, respectively.



中文翻译:

PPY / Fe 3 O 4纳米复合材料的合成及吸附应用

本研究涉及一种高效的聚吡咯/ Fe 3 O 4(PPY / Fe 3 O 4)纳米复合材料的合成及其在吸附去除Pb(II),Cd(II)和Zn(II)离子中的利用。合成PPY / Fe 3 O4基于纳米复合材料的吸附剂已通过FE-SEM(场发射扫描电子显微镜),EDX(能量色散X射线),P-XRD(粉末X射线衍射)和FTIR(傅立叶变换红外)技术进行了表征。特征FTIR峰被发现在3427厘米-1,1618厘米-1,1395厘米-1,1086厘米-1,1180厘米-1,525厘米-1个和453 cm -1表示在PPY / Fe 3 O表面存在N–H,C = N,C–O,C–N,CC–C,C–Fe,Fe–O等键4纳米复合材料。通过应用不同的吸附参数,在PPY / Fe 3 O 4表面吸附了选定的重金属离子。发现在1 g PPY / Fe 3 O 4中,铅,镉和锌离子的去除率(%)在60分钟时分别为69.1%,62.1%和53.9%,54.9%,51.9%和36.9,以及96.2%,83.9分别在pH值为6时为50%和89.9%。已使用不同的等温线和动力学模型观察了吸附过程的适用性,吸附机理和吸附速率。最大吸附量(ķ啦啦)已使用Langmuir模型分别评估为11.350、8.928和7.107 mg g -1的铅,镉和锌离子。PPY / Fe 3 O上Pb(II),Cd(II)和Zn(II)离子的伪一级速率常数(k 1)的值4发现纳米复合材料为-0.644 min -1,-0.694 min-1个和-0.563 min -1。计算出的铅,镉和锌离子的伪二级速率常数分别为1.122、0.816和1.004 g mg -1 min -1

更新日期:2021-02-05
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