碳量子点(CQDs)因其良好的光稳定性、生物相容性、光学电荷转移特性及荧光特性的等优点而备受关注。本篇论文使用简单的热解法，以葡萄糖酸亚铁、柠檬酸为碳源，L-丙氨酸为氮源，制备碳量子点复合催化剂(Ala-CQDs)。利用红外光谱仪、X射线衍射仪等手段对样品结构进行表征，研究其光催化降解罗丹明 B 的光催化性能，考察了催化剂投加量、初始 pH、溶液初始浓度等因素对Ala-CQDs光催化性能的影响。实验结果表明:以2 g葡萄糖酸亚铁、2 g柠檬酸和0。6 g L-丙氨酸为配比时，制备出的Ala-CQDs对罗丹明B溶液具有良好的光催降解效果。当Ala-CQDs投加量为10 mg，处理50 mL浓度为 10 mg/L的罗丹明B溶液120 min后，罗丹明B的降解为 81。26%。
Preparation and Photocatalytic Performance of Carbon Quantum Dot Composite Catalysts
Carbon quantum dots(CQDs)have attracted much attention due to their excellent photostability,biocompatibility,optical charge transfer properties and fluorescence properties.In this paper,carbon quantum dot composite catalysts(Ala-CQDs)were prepared by pyrolysis using ferrous gluconate and citric acid as carbon sources,L-alanine as N sources.The synthesis of Ala-CQDs was confirmed by the results of various analyses such as XRD,FT-IR,and XPS,Furthermore,the photocatalytic activity of the prepared Ala-CQDs was examined in the degradation of RhB under Vis irradiation,while the effective parameters including pH,amount of photocatalyst,and dye concentration were optimized.The experimental results show that the carbon quantum dot composite catalyst prepared with the ratio of 2 g ferrous gluconate,2 g citric acid and 0.6 g L-alanine has good photocatalytic degradation on RhB.The degradation rate of RhB was 81.26%after treatment of 50 mL Rhodamine B solution with concentration of 10 mg/mL for 120 min at the dosage of 10mg composite catalyst.
NETL
NSTL
万方数据
