Optical band gap engineering of phosphotungstic acid upon hybridization with hexamine-nickel and -cobalt for solar/visible light photocatalysis: a combined experimental and theoretical approach

IF 1.2 4区物理与天体物理 Q4 OPTICS

Journal of Modern Optics Pub Date : 2023-03-30 DOI:10.1080/09500340.2023.2241568

M. Taghdiri, F. Akbarian, Aezam Dehghani-Firoozabadi, R. Behjatmanesh-Ardakani, S. Banitaba, Hamid Reza Zare-Mehrjardi

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引用次数: 0

Abstract

Two new organic hybrids of phosphotungstic acid (PTA) were prepared by means of hexamine complexes of nickel and cobalt. The effects of complexes were studied on the photocatalytic activity of PTA. The hybrids were characterized by elemental analyses, FTIR, powder XRD and TGA. The optical band gaps of phosphotungstate-hexamine-nickel and phosphotungstate-hexamine-cobalt were estimated from the diffuse reflectance spectra using the Tauc plots. Dye adsorption and photocatalytic properties of hybrids were tested by decolorizing of model dye solutions methylene blue, rhodamine B and methyl orange. Band gap engineering of the hybrids was investigated using the quantum chemical calculations based on density functional theory through variation in the composition. Theoretical analysis demonstrates how the band gap of these hybrids can be adjusted with variation in their composition. The scavengers were used to suggest photodegradation mechanism. The degradation advanced through the excitation of hybrid by light, followed the oxidation of dye by superoxide radicals.

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磷钨酸与六亚胺-镍和-钴杂化用于太阳/可见光光催化的光学带隙工程:实验与理论相结合的方法

利用镍和钴的六胺配合物制备了两种新型磷钨酸有机杂化物。研究了配合物对PTA光催化活性的影响。通过元素分析、红外光谱、粉末X射线衍射和热重分析对其进行了表征。利用Tauc图从漫反射光谱中估算了磷钨酸盐六胺镍和磷钨酸盐钴的光学带隙。通过对亚甲基蓝、罗丹明B和甲基橙模型染料溶液的脱色，测试了杂化物对染料的吸附和光催化性能。利用基于密度泛函理论的量子化学计算，通过成分的变化，研究了杂化物的带隙工程。理论分析表明，这些杂化物的带隙是如何随着其组成的变化而调整的。清除剂被用来提示光降解机制。降解是通过光激发杂化物，然后通过超氧化物自由基氧化染料来进行的。

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来源期刊

Journal of Modern Optics 物理-光学

CiteScore

2.90

自引率

0.00%

发文量

审稿时长

2.6 months

期刊介绍： The journal (under its former title Optica Acta) was founded in 1953 - some years before the advent of the laser - as an international journal of optics. Since then optical research has changed greatly; fresh areas of inquiry have been explored, different techniques have been employed and the range of application has greatly increased. The journal has continued to reflect these advances as part of its steadily widening scope. Journal of Modern Optics aims to publish original and timely contributions to optical knowledge from educational institutions, government establishments and industrial R&D groups world-wide. The whole field of classical and quantum optics is covered. Papers may deal with the applications of fundamentals of modern optics, considering both experimental and theoretical aspects of contemporary research. In addition to regular papers, there are topical and tutorial reviews, and special issues on highlighted areas. All manuscript submissions are subject to initial appraisal by the Editor, and, if found suitable for further consideration, to peer review by independent, anonymous expert referees. General topics covered include: • Optical and photonic materials (inc. metamaterials) • Plasmonics and nanophotonics • Quantum optics (inc. quantum information) • Optical instrumentation and technology (inc. detectors, metrology, sensors, lasers) • Coherence, propagation, polarization and manipulation (classical optics) • Scattering and holography (diffractive optics) • Optical fibres and optical communications (inc. integrated optics, amplifiers) • Vision science and applications • Medical and biomedical optics • Nonlinear and ultrafast optics (inc. harmonic generation, multiphoton spectroscopy) • Imaging and Image processing