CdIn_(2)S_(4)光催化剂的合成及水分解产氢实验设计

Experiment design of CdIn_(2)S_(4)-related photocatalystsfor splitting water into H2

设计了一种新型的光催化剂产氢性能实验,以水热法合成出CdIn_(2)S_(4)(CIS)微球,探究磷掺杂对CIS材料光催化产氢性能的影响规律。结果表明,CIS样品250℃煅烧的磷具有最佳的光催化性能,其产氢速率为纯CIS的2.4倍。催化性能的增强,归结于磷掺杂降低了CIS的禁带宽度,增强了其在可见光波段的光吸收,使得更多的光生电子与空穴参与到光催化水分解反应中。本实验不仅能加深学生对半导体能带结构和光催化原理等基础知识的理解,还可通过对实验操作、现象观察与结果分析等环节加强学生创新能力的培养。

A new photocatalyst for H2 production performance experiment was designed,and CdIn_(2)S_(4)(CIS)microspheres were synthesized by hydrothermal method to explore the effect of phosphorus doping on the photocatalytic H2 production performance of CIS materials.The results show that the phosphorus-doped CIS sample calcined at 250℃has the best photocatalytic performance,and its H2 production rate is 2.4 times that of pure CIS.The enhancement of catalytic performance is attributed to the fact that phosphorus doping reduces the bandgap width of CIS and the enhancement of its optical absorption in the visible light band,making more photogenerated electrons and holes participate in the photocatalytic water decomposition reaction.This experimental project can not only deepen students’understanding of the basic knowledge of semiconductor energy band structure and photocatalysis principle,but also cultivate students’innovative ability through experimental operation,phenomena observation and result analysis.