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, Muqing[1];Liu, Zhixin[1];Wang, Shuqin[1];Hu, Baowei[1]

机构：[1]Shaoxing Univ, Sch Life Sci, Huancheng West Rd 508, Shaoxing 312000, Peoples R China

年份：2021

卷号：196

外文期刊名：ENVIRONMENTAL RESEARCH

收录：SCI-EXPANDED(收录号：WOS:000649622900012)、、WOS

基金：Financial support from National Natural Science Foundation of China (No. 21876115) and Zhejiang Provincial Natural Science Foundation of China (No. LGF20C030001) are acknowledged.

语种：英文

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

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.