CAJ | 학술논문

分别采用原位复合和简单混合方法制备了碳点/银( CDs/Ag)复合结构.原位复合的CDs/Ag对光的吸收和对亚甲基蓝的降解都高于简单混合的CDs/Ag.研究了H2 O2和碳点荧光强度对CDs/Ag原位复合结构的影响.结果表明， H2 O2的加入量会改变CDs/Ag原位复合结构的形貌与光吸收，从而导致不同的光催化性能；用强荧光发射的碳点原位制备的CDs/Ag复合结构具有更好的光吸收特性和更高的光催化活性. CDs/Ag原位复合结构具有高催化活性是由于碳点与纳米银间形成了强化学键，有利于等离子共振效应发生，从而促使了光的吸收及能量转化效率的提高.
분별채용원위복합화간단혼합방법제비료탄점/은( CDs/Ag)복합결구.원위복합적CDs/Ag대광적흡수화대아갑기람적강해도고우간단혼합적CDs/Ag.연구료H2 O2화탄점형광강도대CDs/Ag원위복합결구적영향.결과표명， H2 O2적가입량회개변CDs/Ag원위복합결구적형모여광흡수，종이도치불동적광최화성능；용강형광발사적탄점원위제비적CDs/Ag복합결구구유경호적광흡수특성화경고적광최화활성. CDs/Ag원위복합결구구유고최화활성시유우탄점여납미은간형성료강화학건，유리우등리자공진효응발생，종이촉사료광적흡수급능량전화효솔적제고.
The composites between carbon dots and silver nanostructures ( CDs/Ag ) were synthesized by in-situ synthesis and simple mixing, respectively. The products obtained by in-situ synthesis exhibit stronger light absorption and higher photocatalytic activity for methylene blue( MB) degradation than those of simple mixing. The effects of H2 O2 addition and the fluorescence intensity of CDs on photocatalytic activities of the obtained CDs/Ag were analyzed. The experimental results indicate that the amount of H2 O2 addition can change the morphology and light absorption of CDs/Ag, and then results in different photocatalytic performances. On the other hand, the CDs/Ag obtained from CDs with stronger fluorescence emission shows stronger light absorption and higher photocatalytic activities. The possible mechanism of photocatalytic activities of the in-situ synthe-sized CDs/Ag could be that strong combination between CDs and Ag nanocrystals induced much stronger sur-face plasma resonance, thus enhancing light absorption and the light energy conversion efficiency.