文献类型：期刊文献

英文题名：Graphene oxide decorated nanoscale iron sulfide for highly efficient scavenging of hexavalent chromium from aqueous solutions

作者：Wu, Hui[1];Li, Li[1];Chang, Kaikai[1];Du, Kui[1];Shen, Chao[2];Zhou, Shaodong[3];Sheng, Guodong[1];Linghu, Wensheng[5];Hayat, Tasawar[4];Guo, Xiaojie[5]

机构：[1]Shaoxing Univ, Coll Chem & Chem Engn, Huancheng West Rd 508, Shaoxing 312000, Zhejiang, Peoples R China;[2]Zhejiang Shuren Univ, Coll Biol & Environm Engn, Hangzhou 310015, Zhejiang, Peoples R China;[3]Zhejiang Univ, Coll Chem & Biochem Engn, Zhejiang Prov Key Lab Adv Chem Engn Manufacture T, Hangzhou 310027, Peoples R China;[4]King Abdulaziz Univ, Fac Sci, Dept Math, NAAM Res Grp, Jeddah, Saudi Arabia;[5]Hangzhou Dianzi Univ, Coll Mat & Environm Engn, Hangzhou 310018, Zhejiang, Peoples R China

年份：2020

卷号：8

期号：4

外文期刊名：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:000562078200010)、、EI(收录号：20204109335919)、Scopus(收录号：2-s2.0-85089906882)、WOS

基金：The work was supported by Zhejiang basic public welfare research project in 2018 year (LGG18B07002), and the National Natural Science Foundation of China (21777102, 21577093). We also sincerely thank the young and middle aged academic cadres from Shaoxing University.

语种：英文

外文关键词：Graphene oxide; Iron sulfide; Cr(VI); Decoration; Removal mechanism

外文摘要：In this paper, a novel graphene oxide (GO) decorated nanoscale FeS composite (GO/FeS) combining both advantages of GO and FeS was synthesized and tested for the highly efficient scavenging of Cr(VI) from aqueous solutions. The as- synthesized materials were characterized by scanning electron microscopy-energy dispersive spectrometer (SEM-EDS), transmission electron microscopy (TEM), atomic force microscopy (AFM), Raman spectra and X-ray photoelectron spectroscopy (XPS) in detail. The results indicated that FeS nanoparticles were effectively decorated onto the surface of GO through - OH, C-O, C=O, and O = C-O functional groups, resulting in larger specific surface area and higher reactivity The nanocomposites displayed an enhanced Cr(VI) scavenging capacity, and the acidic conditions favored the Cr(VI) scavenging by GO/FeS. The kinetics of Cr(VI) scavenging on GO/FeS nanoparticles was in accordance with the pseudo-second order kinetic model, suggesting that chemical interaction is mainly responsible for Cr(VI) scavenging on GO/FeS. Furthermore, the Langmuir model fit the best, and q(max), i.e. the maximum scavenging capacity of Cr(VI) obtained from the Langmuir model reached 138.5 mg/g, Surface sorption and reduction were the dominant scavenging mechanisms for Cr(VI) by GO/FeS. The present study demonstrated the promise of GO/FeS as an effective scavenger for the remediation of Cr(VI) in groundwater environment.