聚吡咯/石墨相氮化碳光催化材料的制备及其铀降解性能研究

Synthesis of PPy/g-C3N4 photocatalytic materials and its degradation properties towards uranium

为了提高g-C3N4的光催化性能,通过原位聚合法制备了PPy/g-C3N4复合材料。通过SEM、XRD、BET和FTIR等表征手段研究PPy/g-C3N4的微观形貌、化学组成以及光催化降解铀的性能。结果表明,PPy抑制了g-C3N4晶粒的生长,提高了g-C3N4的比表面积。在降解时间60 min,pH=5,U(VI)初始浓度5 mg/L,光催化剂投加量200 mg/L的条件下,g-C3N4和PPy/g-C3N4复合材料对U(VI)的降解率分别为83.11%和96.20%。重复使用3次后,PPy/g-C3N4对U(VI)的降解率仍达92.4%。

In order to improve the photocatalytic performance of g-C 3N 4,PPy/g-C 3N 4 composites were prepared by in-situ polymerization.SEM,XRD,BET and FTIR were used to study the PPy/g-C 3N 4 micromorphology,chemical composition and photocatalytic degradation of uranium.The results show that PPy inhibits the growth of g-C 3N 4 grains and increases the specific surface area of g-C 3N 4.When the degradation time was 60 min,pH=5,the initial concentration of U(VI)was 5 mg/L,and the amount of photocatalyst was 200 mg/L.g-C 3N 4 and PPy/g-C 3N 4 composites on the degradation rates of U(VI)were 83.11%and 96.20%,respectively.After repeated use 3 times,the degradation rate of U(VI)by PPy/g-C 3N 4 still reached 92.4%.