光降解
石墨烯
光催化
材料科学
甲基橙
氧化物
光电流
过渡金属
拉曼光谱
催化作用
兴奋剂
纳米颗粒
金属
无机化学
核化学
化学工程
纳米技术
化学
冶金
有机化学
光电子学
工程类
物理
光学
作者
Farheen Khurshid,M. Jeyavelan,Samuthira Nagarajan
标识
DOI:10.1016/j.synthmet.2021.116832
摘要
This study involved the synthesis and characterization of novel graphene oxide (GO) nanostructured materials modified with transition metal elements (Fe, Co, Ni, and Cu) as co-catalyst by using the chemical precipitation method. Microscopy analysis showed the formation and distribution of metal nanoparticles on the GO matrix and the co-existence of doped elements was identified using energy dispersive X-ray (EDX) spectroscopic analysis. The characteristic vibration bands of GO were examined by using Raman analysis. Brunauer-Emmett-Teller (BET) measurements confirmed decrement in the surface area of GO after metal addition. The photoelectrochemical performance and methyl orange (MO) degradation performance was investigated under ultraviolet light irradiation. The photocurrent of GO was significantly improved after the addition of metal nanoparticles. Predominantly, the Co and Ni-modified GO samples showed a high photocurrent generation of 64.9 μA/cm2 and 54.4 μA/cm2 respectively. The photocatalytic studies revealed that the modified GO samples exhibited greater dye degradation efficiency than the pristine GO. Among modified GO samples, Co and Ni-modified GO exhibited a remarkable photodegradation efficiency (84%) and rate constants (k = 13 ×10−3 min−1 & 16 ×10−3 min−1). The results imply that the Co and Ni-modified GO samples are the most efficient photocatalysts for MO dye removal.
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