Effect of Ultraviolet and Solar Radiation on Photocatalytic Dye (Black-E and Congo Red) Degradation Using Copper Oxide Nanostructure Particles

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2021-09-10 DOI:10.22068/IJMSE.2145

Usha Vengatakrishnan, K. Subramanian, Vettumperumal Rajapand, Dhineshbabu Nattanmai Raman

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引用次数: 3

Abstract

Copper oxide (CuO) nanostructure particles were prepared using KOH/NaOH catalyst by low cost precipitation method and characterized by powder X-ray diffraction (PXRD), scanning electron microscope (SEM) and energy dispersive X-ray spectra (EDX) analysis. The photocatalytic dye degradation study of pure CuO nanostructure particles are analysed against two azo dyes (Direct black 38 (Black-E) and Congo red) under ultraviolet (UV) and solar irradiation. The release of major active species (*OH) in the photocatalytic degradation by as prepared CuO nanostructure particles were investigated by photoluminescence (PL) spectra with two different excitation wavelength (325 and 355nm). The band gap of CuO nanostructure particles was calculated from diffuse reflectance spectra. The photocatalytic effect of CuO nanostructure particles is confirmed by the UV – Vis and photoluminescence spectra and from the kinetic studies under UV and solar radiations. The photocatalytic degradation results revealed that 16.35 and 7.5% of black E and Congo red dye was degraded under UV, while the degradation was 47.2 and 17.6% under solar light. The influence of pH on the photodegradation and change in the reaction temperature under solar irradiation were also investigated.

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紫外线和太阳辐射对氧化铜纳米颗粒光催化降解染料（黑-E和刚果红）的影响

以KOH/NaOH为催化剂，采用低成本沉淀法制备了氧化铜(CuO)纳米结构颗粒，并通过粉末x射线衍射(PXRD)、扫描电镜(SEM)和能量色散x射线能谱(EDX)分析对其进行了表征。研究了纯CuO纳米结构粒子在紫外线和太阳照射下对两种偶氮染料(Direct black 38 (black - e)和刚果红)的光催化降解研究。采用不同激发波长(325 nm和355nm)的光致发光(PL)光谱研究了制备的CuO纳米结构粒子光催化降解过程中主要活性物质(*OH)的释放。利用漫反射光谱计算CuO纳米结构粒子的带隙。紫外可见光谱和光致发光光谱以及紫外和太阳辐射下的动力学研究证实了CuO纳米结构粒子的光催化作用。光催化降解结果表明，紫外光对黑E和刚果红染料的降解率分别为16.35%和7.5%，太阳光对黑E和刚果红染料的降解率分别为47.2%和17.6%。考察了pH对太阳辐照下光降解和反应温度变化的影响。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.