CAJ | 학술논문

光催化还原 CO2过程中，能带隙小的材料具备优良的可见光吸收性能，但吸收的可见光并不一定能够有效地被光催化还原作用所利用，这与催化剂能带位置有着直接关系，改变材料的能带结构对调节材料的氧化还原性能有着重要影响。本文从光催化还原 CO2的基本原理出发，介绍了半导体催化剂光催化还原 CO2的基本过程及催化剂价带、导带位置的决定性作用，简述了当今光催化还原 CO2过程中存在的催化剂价带、导带不匹配问题，并从特定晶面生长、材料复合、形成p-n结、第一性原理等方面综述了如何利用能带匹配理论来提高光催化还原CO2效率，为光催化还原CO2的材料的选择和设计提供了理论依据。
광최화환원 CO2과정중，능대극소적재료구비우량적가견광흡수성능，단흡수적가견광병불일정능구유효지피광최화환원작용소이용，저여최화제능대위치유착직접관계，개변재료적능대결구대조절재료적양화환원성능유착중요영향。본문종광최화환원 CO2적기본원리출발，개소료반도체최화제광최화환원 CO2적기본과정급최화제개대、도대위치적결정성작용，간술료당금광최화환원 CO2과정중존재적최화제개대、도대불필배문제，병종특정정면생장、재료복합、형성p-n결、제일성원리등방면종술료여하이용능대필배이론래제고광최화환원CO2효솔，위광최화환원CO2적재료적선택화설계제공료이론의거。
In the process of photocatalytic reduction of CO2,visible light could be absorbed perfectly by the catalyst with a narrowed band gap,but those absorbed light could not be entirely devoted to photocatalytic reduction of CO2,as photocatalytic reduction performance is directly related to energy band location and band structure changing has an important influence on redox ability. Beginning with the CO2 photocatalytic reduction basic principles,this paper is aimed to introduce the basic reduction process of CO2 by semiconductor photocatalyst,the decisive role of valence band and conduction band;to briefly discuss the existing mismatch problem of valence band and conduction band in the process of photocatalytic reduction of CO2;and also to describe how to improve the CO2 photocatalytic reduction efficiency using energy band match theory,such as crystal growth,composite materials,form“p-n junction” and the First Principles,which provides theoretical references for the selection and design of catalyst for the photocatalytic reduction of CO2.