AgInS2/ZnIn2S4异质结高效降解罗丹明B研究

Study on the Highly Efficient Degradation of Rhodamine B by Ag AgInS2/ZnIn2S4 Heterojunction

通过一锅水热法成功制备AgInS2/ZnIn2S4(AIS/ZIS)异质结催化剂,表征了其物相组成和结构性质,测试了其光学性质和光电流响应和电化学阻抗,并使用罗丹明B作为目标污染物研究了催化剂的光催化性能。实验结果表明,制备的AIS/ZIS异质结能够有效抑制光生电子和空穴的分离,从而提高了光生载流子的分离效率,使光催化效果明显提高;Ag InS2、ZnIn2S4摩尔比为0.6:1的AIS/ZIS具有最好的降解效果,30 min对罗丹明B的降解效果可以达到98%,而且具有较广的pH适用范围,在循环使用10次后降解率仍然能够达到93%,说明制备的AIS/ZIS异质结性质稳定,循环性强,具有实际应用价值。

The AgInS2/ZnIn2S4 heterojunction catalyst was successfully prepared by a one-pot hydrothermal method, and the phase composition and structural properties of the catalysts were characterized, the optical properties, photocurrent response and electrochemical impedance were measured, and the photocatalytic performance of the catalysts was studied using Rhodamine B as the target contaminant. The results indicated that the as-prepared AgInS2/ZnIn2S4 heterojunction could efficient inhibit the separation of photogenerated electrons and holes to improve the separation efficiency of photogenerated carriers, resulting a significant increase of the photocatalytic properties. It was found that AgInS2/Znln2S4 with molar ratio of 0.6:1 had the best degradation for rhodamine B, which could reach 98% within 30 min, and it had a wider pH application range and could be reused at least ten times with a high degradation of 93%. It shows that the prepared AgInS2/ZnIn2S4 heterojunction has stable properties and strong cycle performance, which has practical application value.