期刊论文

Xie, Shuibo(xiesbmr@263.net)

中文

材料工程

1001-4381

2022

50

10

157-164

10.11868/j.issn.1001-4381.2020.001009

11475080:国家自然科学基金 19A421:湖南省教育厅重点项目

本校为第一机构

以ZnO和三聚氰胺为原料,采用热聚合法制备ZnO/g-C3 N4复合型光催化剂,并将其用于光催化还原U(Ⅵ).通过SEM,XRD,XPS,PL,UV-Vis测试手段对样品的表面形貌、晶格结构、元素组成、光催化性能进行分析.结果表明:ZnO的掺杂降低光生电子与空穴的复合率,扩大材料对可见光的响应范围,使复合材料具有更高的光催化活性.在pH=5、投加量为0.5 g/L时,经过暗反应30 min和光反应30 min,对U(Ⅵ)的最高去除率可达97％.U(Ⅵ)可被还原为U(Ⅳ),光生电子e-是实现将U(Ⅵ)还原为U(Ⅳ)的主要因素.

Based on ZnO and melamine, the ZnO/g-C3N4for photocatalytic U(Ⅵ) reduction was pre-pared by thermal polymerization methods. The surface morphology, lattice structure, element composition and photocatalytic efficiency were analyzed by SEM, XRD, XPS, PL and UV-Vis methods.The results show that the doping of ZnO reduces the recombination rate of photogenerated electrons and holes, expands the response range of the material to visible light, makes ZnO/g-C3N4have higher photocatalytic activity. When pH=5 and dosage is 0.5 g/L, the highest U(Ⅵ) rem...