摘要
氢能作为清洁二次能源,可为解决我国能源问题提供参考。光解水产氢技术因其可以直接利用太阳光把水分解成H2和O_(2)而备受关注,寻找合适的光催化剂是光解水产氢技术的关键。CdS具有良好的光催化活性,但仍存在能带结构有待进一步优化、光腐蚀及光生载流子复合率高等问题。对CdS光催化剂用于光解水产氢的机理进行了总结,针对CdS光催化剂现存的问题给出了具有参考性的解决方案。采用元素掺杂法可使催化剂获得合理的能带结构,通过设计保护层和去除O_(2)可提高催化剂光腐蚀抗性,通过构建内建电场、设计活性位点和形貌调控技术可提高光生载流子迁移效率。
As a clean secondary energy source,hydrogen energy can provide a reference for solving China’s energy problems.Photolysis of water to hydrogen has attracted much attention because it can directly use sunlight to split water to H2 and O_(2).Finding suitable photocatalyst is the key to photolysis of water to produce hydrogen.CdS has good photocatalytic activity,however,there are still some problems,such as the need for further optimization of the band structure,photocorrosion and high photogenerated carrier recombination rate.The mechanism of CdS photocatalyst for hydrogen production by photolysis of water was summarized,and a reference solution to the existing problems of CdS photocatalyst was gived.The reasonable band structure of the catalyst can be obtained by element doping,and the photocorrosion resistance can be improved by designing the protective layer and removing O_(2),and the photogenerated carrier migration efficiency can be increased by constructing the built-in electric field,designing the active site and morphology control technology.
作者
刘家如
刘喆
杨春维
LIU Jiaru;LIU Zhe;YANG Chunwei(College of Engineering,Jilin Normal University,Siping 136000,Jilin,China;Jilin Provincial Key Laboratory of Environmental Materials and Pollution Control,Jilin Normal University,Siping 136000,Jilin,China)
出处
《低碳化学与化工》
北大核心
2025年第7期118-124,共7页
Low-Carbon Chemistry and Chemical Engineering
基金
吉林省发改委项目(2023C032-5)
吉林省科技厅项目(2023101213JC)。
关键词
CdS光催化剂
光解水产氢
能带结构
光腐蚀
光生载流子
CdS photocatalyst
photolysis of water to produce hydrogen
band structure
photocorrosion
photogenerated carrier
