文献类型：期刊文献

英文题名：One-pot fabrication of nanoscale zero-valent iron scaffolded onto graphitic carbon nitride as bifunctional nanohybrid in sequestering U(VI) and Cr(VI) with boost performance and intrinsic mechanism

作者：Zhang, Xinyu[1];Du, Kui[2];Deng, Liping[2];Zhang, Ziyou[3];Chen, Zhiqiang[3];Dong, Hongliang[3]

机构：[1]Beijing Univ Chem Technol, Dept Int Educ, Beijing 100029, Peoples R China;[2]Shaoxing Univ, Sch Chem & Chem Engn, Shaoxing 312000, Zhejiang, Peoples R China;[3]Ctr High Pressure Sci & Technol Adv Res, Pudong, Shanghai 201203, Peoples R China

年份：2024

卷号：654

外文期刊名：APPLIED SURFACE SCIENCE

收录：SCI-EXPANDED(收录号：WOS:001174513700001)、、EI(收录号：20240515450460)、Scopus(收录号：2-s2.0-85183173354)、WOS

基金：This work was also supported by the Opening Project of Zhejiang Engineering Research Center of Fat-soluble Vitamin.

语种：英文

外文关键词：U(VI)/Cr(VI); Graphitic carbon nitride; Nanoscale zero -valent iron; Boost performance; Intrinsic mechanism

外文摘要：In this paper, we reported an innovative one-pot fabrication approach of a bifunctional nanohybrid through scaffolding of nanoscale zero-valent iron onto the inter-layer structure of graphitic carbon nitride in sequestering U(VI) and Cr(VI) in wastewater. The microstructures, morphologies and chemical compositions of the as-fabricated g-C3N4/NZVI nanohybrid before and after U(VI)/Cr(VI) sequestration were exploited in detail by applying various physicochemical and spectroscopic methods. Batch experimental results demonstrated that sequestration of targeted U(VI)/Cr(VI) by g-C3N4/NZVI was higher than those of pure NZVI or g-C3N4 due to the pronounced boost performance, which was ascribed from the introduction of g-C3N4 as matrix inhibited the oxidation of NZVI and improved its reactivity. The pH effect was also elucidated and it was found that lower pH facilitated the sequestration of the negatively-charged Cr(VI), while higher pH benefited the sequestration of the positively-charged U(VI). Moreover, the characterization insights into intrinsic mechanism manifested that sequestration of U(VI)/Cr(VI) was fulfilled through a synergistic effect of adsorption, reduction and coprecipitation. This work is of great significance for understanding the combined sequestration mechanism of U(VI) and Cr(VI), and usage of g-C3N4/NZVI in sequestration of severe dangerous metal ions, especially efficient detoxification of toxic cations and anions in wastewater.