Facile fabrication of green nano pure CeO2and Mn-decorated CeO2withCassia angustifoliaseed extract in water refinement by optimal photodegradation kinetics of malachite green

被引：13

作者：

Antony, Dhivya ^{[1
]}

Yadav, Rakhi ^{[1
]}

机构：

[1] Univ Madras, Madras Christian Coll, Dept Chem, Chennai 600059, Tamil Nadu, India

来源：

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH | 2021年 / 28卷 / 15期

关键词：

Green nano-synthesis; Pure CeO2; Mn-decorated CeO2; Cassia angustifolia; Malachite green; Degradation; EFFICIENT PHOTOCATALYTIC DEGRADATION; DOPED CEO2; VISIBLE-LIGHT; OPTICAL-PROPERTIES; NANOPARTICLES; DYE; NANOSTRUCTURES; POLLUTANTS; CERIA; CA;

D O I：

10.1007/s11356-020-11153-9

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

To eradicate the aquatic pollution caused by dyes, trendily the global researchers provide dedication to dye degradation using nanostructured photocatalyst. This research work is dedicated to explore an advanced, facile, bio-compact green fabricated nanostructure for water refinement. In this regard, plant-mediated syntheses of pure CeO(2)and Mn-decorated CeO(2)nano-powders have been inspected using seed extract ofCassia angustifolia. Investigations through UV-diffuse reflectance spectroscopy explored the significantly tuned band gap of Mn:CeO2. FT-IR spectroscopy shows the existing functional groups of high-potential phenolic compounds, proteins, and amino acids inCassia angustifoliaact as reducing and capping agents involved in the green fabricated nanostructured samples. X-ray diffraction pattern has been exposed to crystalline cubic fluorite morphology in a single phase and it leads to a regulated optimized amount of Mn on CeO(2)nanostructure. The FESEM analysis predicts the morphology of CeO(2)in spherical and Mn:CeO(2)in flower-like structure. The HRTEM analysis has portrayed particle size of CeO(2)is 11 nm and tuned Mn:CeO(2)nanostructure is 9 nm. The HRTEM images revealed the average particle size in the range 10-12 nm in CeO(2)and 8-9 nm in 5 mol% Mn:CeO(2)nanoparticles. It showed a decrease in average particle size with an increase in Mn concentration and the reduction in size may be due to the replacement of Ce(IV) with Mn(II) ions. The elemental composition in nanostructure was predicted using energy-dispersive X-ray analysis. The rapid photocatalytic degradation efficiency of malachite green was effectually performed and compared with the kinetics model of Mn:CeO(2)and pure CeO(2)nanostructures. From the augmented results, tuned Mn:CeO(2)was found to act as the finest green fabricated photocatalyst in the amputation of lethal and carcinogenic dye.

引用

页码：18589 / 18603

页数：15

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