论文部分内容阅读
研究了沉淀煅烧法制备的纳米级(CuAg)0.15In0.3Zn1.4S2光催化剂以及产氢效率,并采用X射线衍射、透射电镜、扫描电镜、N2吸附-脱附、紫外-可见吸收光谱等手段对催化剂进行了表征.结果表明,(CuAg)0.15In0.3Zn1.4S2的结晶度、比表面积和吸收可见光能力与煅烧温度和煅烧时间有关.在可见光下,以KI为电子给体,考察了不同条件对光催化产氢能力的影响.发现在600℃煅烧5 h时所制的(CuAg)0.15In0.3Zn1.4S2光催化剂产氢活性最高,产氢速率为1750μmol g-1h-1,量子效率在420±5 nm达到12.8%,比未煅烧催化剂的光催化活性提高了约6倍.
The nano-scale (CuAg) 0.15In0.3Zn1.4S2 photocatalysts prepared by the precipitation calcination method and the hydrogen production efficiency were studied. The structures of the catalysts were characterized by X-ray diffraction, transmission electron microscopy, scanning electron microscopy, N2 adsorption-desorption and UV- The results show that the (CuAg) 0.15In0.3Zn1.4S2 crystallinity, specific surface area and the ability to absorb visible light are related to the calcination temperature and calcination time.Under the visible light, KI is used as the electron donor, It is found that the (CuAg) 0.15In0.3Zn1.4S2 photocatalyst prepared at 600 ℃ for 5 h has the highest hydrogen production rate and the hydrogen production rate is 1750 μmol g-1h-1. The quantum efficiency Reaching 12.8% at 420 ± 5 nm, about six-fold more than the photocatalytic activity of the uncalcined catalyst.