期刊论文

Ai, Zhihui;Zhang, Lizhi

英文

Applied Catalysis B: Environmental

0926-3373

2020

263

118364

10.1016/j.apcatb.2019.118364

National Key Research and Development Program of China [2016YFA0203000, 2018YFC1800801, 2018YFC1802003]; National Natural Science Funds for Distinguished Young ScholarsNational Natural Science Foundation of ChinaNational Science Fund for Distinguished Young Scholars [21425728]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China [21876058, 21872061]; 111 ProjectMinistry of Education, China - 111 Project [B17019]

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In this study, we demonstrate that surface phosphate modification of nZVI (p-nZVI) could enhance the electron selectivity of Cr(VI) reduction from 6.1% to 31.3%, as estimated by XANES and XPS, and thus promote the Cr(VI) removal efficiency by 4 folds. DFT calculation and experimental results revealed that phosphate groups were adsorbed on the surface of p-nZVI via a monodentate mononuclear model to inhibit the reaction with oxygen and/or water via the pendant protons of phosphate, accounting for high electron selectivity of p-nZVI. More importa...