摘要
采用水热反应釜法制备碳量子点,然后通过碳量子点还原硝酸银制备CQDs/Ag复合催化剂。利用FT-IR、TEM对样品进行表征,利用荧光分光光度计测试荧光谱,紫外-可见分光光度计测试吸收谱和亚甲基蓝浓度。结果表明:碳量子点表面具有含氧基团和具有还原性的基团,平均粒径约3.5nm,其吸收主要在紫外光区。CQDs/Ag复合催化剂能够使荧光猝灭,可见光区的吸收增强。在可见光照射下,复合催化剂比碳量子点的催化性能更好,CQDs/Ag复合催化剂在35min内能够使50mL 20mg/L的亚甲基蓝完全降解。
CQDs were prepared in a autoclave,and CQDs/Ag composite catalysts were synthesized using CQDs as a reducing agent. The samples were detected by TEM and FTIR. Fluorescence and absorption spectra were recorded on a flu- orescence spectrophotometer and UV-Vis spectrometer, respectively. The results showed that there were many surface groups on the CQDs, such as oxygen group, reducing group, etc, the average diameter of CQDs was about 3.5nm, absorption spectrum mainly lied in ultraviolet region. Fluorescence quenching happened after incorporating Ag into CQDs,and absorp- tion capacity was strengthen in visible light wavelength range. Photocatalytic property of catalysts became stronger than CQDs under visible light irradiation. The composite catalyzed methylene blue of 50mL, 20 mg/L degraded in 35minutes completely.
出处
《化工新型材料》
CAS
CSCD
北大核心
2015年第8期137-139,共3页
New Chemical Materials
基金
国家自然科学基金(51272301
51172120)
