Prepared PANI@nano hollow carbon sphere adsorbents with lappaceum shell like structure for high efficiency removal of hexavalent chromium
Prepared PANI@nano hollow carbon sphere adsorbents with lappaceum shell like structure for high efficiency removal of hexavalent chromium
复制标题
制备具有拉帕斯壳结构的PANI@纳米空心碳球吸附剂高效去除六价铬
DOI：
10.1016/j.chemosphere.2020.128109
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发表时间：
2021
期刊：
影响因子：
8.8
通讯作者：
Hangsheng Yang
中科院分区：
文献类型：
--
作者：
Fei Wang;Yimei Zhang;Qinglu Fang;Zhiying Li;Yuxian Lai;Hangsheng Yang
采用原位聚合法制备了不同质量的聚苯胺@纳米空心碳球（PANI@NHCS）吸附剂。通过扫描电子显微镜（SEM）和透射电子显微镜（TEM）对所制备的PANI@NHCS-10、PANI @ NHCS-20、PANI@NHCS-30和PANI@NHCS-40样品的微观结构进行了观察，结果表明PANI@NHCS-30具有类似于贝壳的中空结构。然后，研究了PANI@NHCS-30对废水中六价铬（Cr（VI））的去除性能。借助PANI@NHCS-30独特的中空结构和还原能力，Cr（VI）被快速吸附，然后被还原为毒性较小的Cr（III）。在最佳吸附条件下，PANI@NHCS-30的最大吸附量为250.0 mg/g。考察了Cr（VI）初始浓度、溶液pH值以及不同离子对吸附性能的影响。重要的是，PANI@NHCS-30在五次循环后仍显示出优异的吸附能力，这表明其令人满意的可重复使用能力。研究结果表明，PANI和中空结构协同促进作用对PANI@NHCS-30催化剂上Cr（VI）还原反应具有重要作用，可用于实际应用。
Herein, the novel polyaniline@nano hollow carbon sphere (PANI@NHCS) adsorbents with different mass of NHCS were prepared by in-situ polymerization method. The microstructure of obtained PANI@NHCS-10, PANI@NHCS-20, PANI@NHCS-30 and PANI@NHCS-40 samples were observed through both scanning electron microscopy (SEM) and transmission electron microscopy (TEM), which showed that the PANI@NHCS-30 possessed hollow structure like lappaceum shell. Then, the performance of obtained PANI@NHCS-30 was studied for removing hexavalent chromium (Cr(VI)) from waste water. With the help of unique hollow structure and reduction ability of PANI@NHCS-30, the Cr(VI) was fleetly adsorbed and then reduced to less toxic Cr(III). The maximum adsorption capacity was 250.0 mg/g for PANI@NHCS-30 under the optimal condition. Moreover, the effects of initial Cr(VI) concentration, solution pH and different ions on the adsorption performance were investigated in detail. Importantly, the PANI@NHCS-30 still shows superb adsorption ability after five cycles, which suggests its satisfactory reusability ability. The accumulated data revealed the crucial role of PANI and hollow structure co-promoting effect on Cr(VI) reduction reactions over PANI@NHCS-30, which could be applied to the practical use.