光诱导合成氮化碳负载的银纳米催化剂

Characteristics of carbon nitride-supported silver nanocatalysts synthesized by photoinduced method

为提高g-C_3N_4的光催化活性,采用光诱导法将银纳米颗粒与g-C_3N_4复合在一起制得氮化碳负载的银纳米催化剂(Ag/g-C_3N_4)。产品分别采用紫外-可见分光光度计、X射线衍射仪与傅里叶变换红外光谱仪进行表征,其光催化活性通过在可见光照射下降解罗丹明B得出。结果表明,光诱导法可以将硝酸银还原成单质银并将其负载到氮化碳表面上,只用0.1 g的Ag/g-C_3N_4对罗丹明B能达到91.6%的降解率,并且循环使用5次后还有高达87.9%的降解率。Ag/g-C_3N_4具有催化活性高、耗量少、稳定性好的特点。

To improve the photocatalytic activity of g-C3N4, carbon nitride-supported silver nanocatalysts(Ag/g-C3N4) were synthesized by photoinduced method througth combining silver nanoparticles with carbon nitride. The products were characterized by UV-Vis spectrophotometer, X-ray diffractometer and Fourier transform infrared spectrometer, respectively. The photocatalytic activity of the as-obtained products was derived by degrading rhodamine B under visible light irradiation. The results showed that silver nitrate can be reduced and the obtained silver particles can then be loaded on the surface of g-C3N4 by photoinduced method. Only 0.1 g of Ag/g-C3N4 can achieve 91.6 % degradation rate for Rhodamine B, and 87.9% degradation rate after 5 cycles. Ag/g-C3N4 has the characteristics of high catalytic activity, low consumption and good stability.