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Enhanced photocatalytic degradation of organic dyes from aqueous environment using neodymium-doped mesoporous layered double hydroxide

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Journal of Rare Earths 2022年第10期40卷 1554-1563页

作者： Ajaz Ahmad Wani amjad mumtaz khan Yahiya Kadaf Manea Mansour A.S.Salem Department of Chemistry Aligarh Muslim UniversityAMUAligarh202002India

Neodymium-doped Zn-Al layered double hydroxide(Nd/Zn-Al LDH) with excellent photocatalytic activity was prepared by a one-step hydrothermal method. The morphology and physicochemical properties of as-synthesized photocatalysts were well analyzed by Fourier transform infrared(FT-IR), X-ray diffraction(XRD), scanning electron microscopy(SEM), transmission electron microscopy(TEM), photoluminescence(PL), UV-diffuse reflectance spectroscopy(UV-DRS), and Brunauer-Emmett-Teller(BET)surface analysis. Doping Nd^(3+) into Zn-Al LDH enhances the overall catalytic activity of the nanocomposite, like better electron-hole pair separation, increase in interplanar distance, fast electron transfer, and large surface area. The as-prepared nanocomposite shows excellent degradation of three different dyes under visible light irradiation. The degradation efficiency of these dyes follows the order of Congo red > rose Bengal > fast green. Furthermore, liquid chromatography-mass spectrometry(LC-MS)was employed to propose a possible photocatalytic degradation pathway for Congo Red and Rose Bengal dyes by Nd/Zn-Al LDH. With the help of radical trapping experiments, it is revealed that during the photoexcitation process, the primary reactive intermediates are hydroxyl radicals.

关键词： Organic pollutants Degradation Multifunctional Mesoporous LC-MS Rare earths

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Alterations in Quality Parameters of Mastitic Milk

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Veterinary Science Research 2020年第2期2卷 31-36页

作者： Maria Azam Muhammad Aamir Naseer Kiran mumtaz Iqra Muzammil KhazeenaAtta Rais Ahmed amjad Islam Aqib Cholistan University of Veterinary and Animal Sciences Bahawalpur63100Pakistan University of Veterinary and Animal Sciences Lahore 54000Pakistan University of Agriculture Faisalabad 38000Pakistan

Quality milk production in modern dairy systems is facing many *** in them is mastitis which is responsible for decline in milk production,altered milk composition and compromised udder *** malaise consists of multiple bacterial etiologies which can be broadly classified into contagious pathogens and environmental pathogens *** is being isolated invariably in all epidemiological studies,followed by *** virulence in mastitis is often accounted due to microbial ability of producing wide array of virulence factors that enhances pathogenicity and sustainment potential in the epithelial linings of *** affects quality parameters of milk *** as well as mineral profile due to local damage and inflammatory *** decreases the lactose secretion because of oxidative stress generated due to the formation of free radicals in the *** mastitic milk,IgG2 becomes the predominant antibody which is thought to be the main opsonin supporting neutrophil phagocytosis in the bovine mammary ***,it plays a significant role in the battle against mastitis *** infected cow shows a notable elevated level of the sodium and chloride and demoted level of calcium,potassium and inorganic *** micro minerals,mastitis effects are pretty much same as in most macro minerals *** down their concentration in milk *** preventive strategy alongside strict surveillance and biosecurity is recommended for combating this challenge.

关键词： Mastitis Milk quality Minerals Lactose Immunoglobulin

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