Enhanced photocatalytic degradation of LaMnO3/rGO nanocomposites under the irradiation of solar spectrum for methylene blue

IF 3.8 Q2 CHEMISTRY, PHYSICAL
Vaishali Misra , Manisha Yadav , Deepak Kumar , Jehova Jire L. Hmar , Vishal Singh , Sanjeev Kumar Sharma
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引用次数: 0

Abstract

This study presents the synthesis of pristine LaMnO3 (LMO) perovskite nanoparticles (NPs) and LMO/rGO nanocomposites (NCs) incorporating 5, 10, and 20 wt.% of reduced graphene oxide (rGO) through an ultrasonicated sol-gel method. The structural, morphological, and optical properties were determined from X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), and UV-Vis spectroscopy. The microstructure and crystallite size of NCs were observed as hexagonal perovskite structures in the 23.4 - 20.1 nm range. The specific surface area of LMO NPs and LMO/rGO NCs were observed to be 6.63 m²/g and 21.39 m²/g, respectively. The photocatalytic activity of NCs was estimated to be responsible for methylene blue (MB) degradation under sunlight irradiation. The LMO/rGO10 NC showed the highest photocatalytic degradation with a degradation rate of 0.00927 min-1 and the highest stability due to increased catalytic active sites. The LMO/rGO NCs hold the potential for the photocatalytic degradation of discharged dyes from textile industries under natural sunlight irradiation.

Abstract Image

太阳光谱照射下 LaMnO3/rGO 纳米复合材料对亚甲基蓝的光催化降解能力增强
本研究采用超声溶胶-凝胶法合成了原始的 LaMnO3(LMO)透晶纳米颗粒(NPs)和含有 5、10 和 20 wt.% 还原型氧化石墨烯(rGO)的 LMO/rGO 纳米复合材料(NCs)。通过 X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、拉曼光谱、傅立叶变换红外光谱 (FTIR) 和紫外可见光谱测定了其结构、形态和光学特性。经观察,NCs 的微观结构和晶粒大小为 23.4 - 20.1 nm 范围内的六方包晶结构。LMO NPs 和 LMO/rGO NCs 的比表面积分别为 6.63 m²/g 和 21.39 m²/g。据估计,在阳光照射下,NCs 的光催化活性可促进亚甲基蓝(MB)的降解。LMO/rGO10 NC 显示出最高的光催化降解能力,降解率为 0.00927 min-1,并且由于增加了催化活性位点而具有最高的稳定性。LMO/rGO NCs 具有在自然阳光照射下光催化降解纺织工业排放染料的潜力。
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来源期刊
Chemical Physics Impact
Chemical Physics Impact Materials Science-Materials Science (miscellaneous)
CiteScore
2.60
自引率
0.00%
发文量
65
审稿时长
46 days
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