双金属片
高分辨率透射电子显微镜
选区衍射
纳米颗粒
材料科学
4-硝基苯酚
量子点
石墨氮化碳
还原剂
光化学
二苯并噻吩
光谱学
氮化碳
金属
透射电子显微镜
催化作用
化学工程
光催化
纳米技术
化学
有机化学
工程类
物理
冶金
量子力学
作者
Pragati Fageria,Shravan Uppala,Roshan Nazır,S. Gangopadhyay,Chien Hsiang Chang,Mrinmoyee Basu,Surojit Pande
出处
期刊:Langmuir
[American Chemical Society]
日期:2016-09-21
卷期号:32 (39): 10054-10064
被引量:105
标识
DOI:10.1021/acs.langmuir.6b02375
摘要
In this study, we report the synthesis of monometallic (Au and Pd) and bimetallic (AuPd) nanoparticles (NPs) using graphitic carbon nitride (g-C3N4) quantum dots (QDs) and photochemical routes. Eliminating the necessity of any extra stabilizer or reducing agent, the photochemical reactions have been carried out using a UV light source of 365 nm where C3N4 QD itself functions as a suitable stabilizer as well as a reducing agent. The g-C3N4 QDs are excited upon irradiation with UV light and produce photogenerated electrons, which further facilitate the reduction of metal ions. The successful formation of Au, Pd, and AuPd alloy nanoparticles is evidenced by UV–vis, powder X-ray diffraction, X-ray photon spectroscopy, and energy-dispersive spectroscopy techniques. The morphology and distribution of metal nanoparticles over the C3N4 QD surface has been systematically investigated by high-resolution transmission electron microscopy (HRTEM) and SAED analysis. To explore the catalytic activity of the as-prepared samples, the reduction reaction of 4-nitrophenol with excellent performance is also investigated. It is noteworthy that the synthesis of both monometallic and bimetallic NPs can be accomplished by using a very small amount of g-C3N4, which can be used as a promising photoreducing material as well as a stabilizer for the synthesis of various metal nanoparticles.
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