石墨烯
催化作用
化学
超顺磁性
氧化物
拉曼光谱
纳米材料基催化剂
三元运算
傅里叶变换红外光谱
核化学
纳米颗粒
穆斯堡尔谱学
分析化学(期刊)
磁化
无机化学
纳米技术
化学工程
材料科学
结晶学
有机化学
工程类
量子力学
计算机科学
物理
光学
磁场
程序设计语言
作者
Tran Viet Thu,Pil Ju Ko,To Van Nguyen,Nguyen Thanh Vinh,Doan Minh Khai,Le Trong Lu
摘要
Materials having both magnetic and catalytic properties have shown great potential for practical applications. Here, a reduced graphene oxide/iron oxide/silver nanohybrid (rGO/Fe 3 O 4 /Ag NH) ternary material was prepared by green synthesis of Ag on pre‐synthesized rGO/Fe 3 O 4 . The as‐prepared rGO/Fe 3 O 4 /Ag NH was characterized using Fourier transform infrared spectroscopy, X‐ray diffractometry, Raman spectroscopy, vibrating sample magnetometry, transmission electron microscopy and energy‐dispersive X‐ray spectroscopy. rGO sheets were covered with Fe 3 O 4 (8–16 nm) and Ag (18–40 nm) nanoparticles at high densities. The mass percentages were 13.47% (rGO), 62.52% (Fe 3 O 4 ) and 24.01% (Ag). rGO/Fe 3 O 4 /Ag NH exhibited superparamagnetic behavior with high saturated magnetization (29 emu g −1 at 12 kOe), and efficiently catalyzed the reduction of 4‐nitrophenol (4‐NP) with a rate constant of 0.37 min −1 , comparable to those of Ag‐based nanocatalysts. The half‐life of 4‐NP in the presence of rGO/Fe 3 O 4 /Ag NH was ca 1.86 min. rGO/Fe 3 O 4 /Ag NH could be magnetically collected and reused, and retained a high conversion efficiency of 94.4% after the fourth cycle. rGO/Fe 3 O 4 /Ag NH could potentially be used as a magnetically recoverable catalyst in the reduction of 4‐NP and environmental remediation.
科研通智能强力驱动
Strongly Powered by AbleSci AI