纳微结构Ag2CO3光催化材料的制备 及其在光催化的应用

Ag₂CO₃是近年来发现的一种新型的可见光响应光催化剂，对甲基橙（MO）、罗丹明B（RhB）和亚甲基蓝（MB）等染料和苯酚等有机物都具有较高的光催化降解能力.然而，在光催化反应过程中，Ag₂CO₃晶体中的Ag+会被自身的光生电子（e-）还原形成金属Ag单质，随着反应的进行，样品的稳定性和光催化效果迅速降低.贵金属沉积、非金属掺杂和形成异质结等方法，可以使Ag₂CO₃的光吸收得到扩展，同时促进光生电子空穴对的分离，从而提升Ag₂CO₃的抗光腐蚀性能和对污染物的降解效率.通过不同的物理和化学方法调控Ag₂CO₃催化材料的形貌、晶粒尺寸和晶体缺陷等，可以提升其比表面积和光生电子空穴的传输效率，进而提高其光催化活性.文中归纳了近年来Ag₂CO₃光催化材料的研究进展，分析了Ag₂CO₃光催化的特点，阐述了一系列提升Ag₂CO₃光催化性能的方法，并对Ag₂CO₃光催化材料的研究进行了总结与展望. 

Preparation and application of nano-micro Ag2CO3 photocatalytic materials

Ag₂CO₃ is a new type of visible light responsive photocatalyst discovered in recent years, which with efficient photodegradation ability for methyl orange (MO), rhodamine B (RhB), methylene blue (MB) dyes and phenols. But, Ag+ in Ag₂CO₃ is easy to be reduced Ag by the photogenarated e-, which induced the fast photocorrosion and poor stability in the photocatalytic reaction process.The light absorption region, the stability and photocatalytic activities of Ag₂CO₃ semiconductor can be extended by noble metal deposition, nonmetal doping and formation of heterojunction, meanwhile, the separation of photo-generated electron-hole pairs can also be promoted. The physical properties such as morphology, crystal size and crystal defects of Ag₂CO₃ can be controlled by different physical and chemical methods to obtain high specific surface area, unique morphology and high separation efficiency of photo-generated electron holes and superior photocatalytic activity. The research progress of Ag₂CO₃ nano photocatalyst is reviewed and its photocatalytic character is analyzed. The strategies for enhancing the photocatalytic activity and stability of Ag₂CO₃ are summarized and discussed, and the research prospect of Ag₂CO₃ nano-micro photocatalyst is proposed.