文献类型：期刊文献

英文题名：The photocatalytic reduction of U(VI) into U(IV) by ZIF-8/g-C3N4 composites at visible light

作者：Qiu M.; Liu Z.; Wang S.; Hu B.

机构：[1]School of Life Science, Shaoxing University, Huancheng West Road 508, Shaoxing, 312000, China

年份：2021

卷号：196

外文期刊名：Environmental Research

收录：Scopus(收录号：2-s2.0-85094941946)

语种：英文

外文关键词：Carbon nitride; Environmental remediation; Photo-reduction; Uranium; ZIF

外文摘要：The development of new photocatalyst towards the highly efficient photo-reduction of U(VI) was highly desirable. In this study, ZIF-8/g-C3N4 photocatalyst was fabricated to photo-reduce U(VI) from aqueous solutions under different water chemistry. It is demonstrated that ZIF-8/g-C3N4 exhibited the fast-photocatalytic rate (completely photoreduction within 30 min), high photocatalytic activity (Kd > 105 mL/g) and superior chemical stability (No significant decrease after fifth cycles). The photoreduction rate of U(VI) significantly decreased with increasing pH, H2O2 radicals and photo-generated electrons play an important role in U(VI) photoreduction by quenching experiments and ESR analysis. According to XPS and XANES analysis, adsorbed U(VI) was partly photo-reduced into U(IV) by ZIF-8/g-C3N4 photocatalyst. The highly efficient removal of U(VI) on ZIF-8/g-C3N4 photocatalyst was attributed to the synergistic effect of ZIF-8 and g-C3N4 photocatalyst. The present study may provide a new strategy to apply new photocatalyst for in-situ photoreduction of U(VI) in actual environmental remediation. ? 2020 Elsevier Inc.