Mechanistic insights into defect chemistry and tailored photoluminescence and photocatalytic properties of aliovalent cation substituted Zn0.94M0.06−xLixO (M: Fe3+, Al3+, Cr3+) nanoparticles

光致发光 X射线光电子能谱 光催化 傅里叶变换红外光谱 兴奋剂 材料科学 罗丹明B 纳米颗粒 化学计量学 催化作用 无机化学 化学工程 化学 纳米技术 物理化学 有机化学 光电子学 工程类
作者
Sajid Ali Ansari,C. Manjunatha,Nazish Parveen,B.W. Shivaraj,R. Hari Krishna
出处
期刊:Dalton Transactions [Royal Society of Chemistry]
卷期号:50 (41): 14891-14907 被引量:12
标识
DOI:10.1039/d1dt01706c
摘要

In this work, we demonstrate the microwave assisted solution combustion synthesis of aliovalent cation substituted Zn0.94M0.06-xLixO (M: Fe3+, Al3+, Cr3+) nanoparticles. The structural features, photoluminescence and photocatalytic properties were characterized by X-ray powder diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and UV-visible and photoluminescence (PL) techniques. We have introduced aliovalent cations such as reducible Fe3+, stable Al3+ and oxidisable Cr3+ ions into ZnO and investigated its structural and optical properties. The charge balance and defect stoichiometric composition of ZnO were also studied by co-doping with Li+ ions. By understanding the photoluminescence and photocatalytic activity of doped and co-doped ZnO nanoparticles, the defect chemistry of ZnO is explained in detail. The photocatalytic efficiency of various doped and co-doped ZnO catalysts was compared with respect to the degradation of rhodamine B dye. Among them, the CZO, AZO and L3AZO catalysts showed enhanced photo-degradation efficiencies of 98.1%, 97.6% and 96.6%, respectively, which are high as compared to that of ZnO (89%). This work presents a novel and straightforward, low-cost, tunable and scalable fabrication protocol for highly efficient ZnO-based photocatalysts for practical applications.
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