Pure and alkaline metal ion (Mg, Ca, Sr, Ba) doped cerium oxide nanostructures for photo degradation of methylene blue

Murugan, R.; Lellala, Kashinath; Subash, R.; Sakthivel, P.; Byrappa, K.; Rajendran, S.; Ravi, G.

doi:10.1016/j.materresbull.2017.09.026

Cited by 69 publications

(17 citation statements)

References 35 publications

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“…The calculated values were also presented in Table 3. The micro-strain ( ε ), is defined by the equation below 21 .where β is the full width at half maximum intensity of the 3 most intense XRD peaks illustrated in Fig. 3B.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Carbon monoxide-sensing properties of Chromium-doped ZnO nanostructures

Habib

Tajuddin

Noor

et al. 2019

Sci Rep

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Low power consumption, fast response and quick recovery times are important parameters for gas sensors performance. Herein, we report the experimental and theoretical studies of ZnO and Cr doped ZnO nanostructures used in low temperature (50 °C) sensors for the detection of CO. The synthesized films were characterized by XRD, UV-Vis, FE-SEM and EDX. The XRD patterns for the ZnO and 0.5 wt% Cr/ZnO films confirm the formation of a single-phase hexagonal wurtzite structure. The reduction of the ZnO optical band gap from 3.12 eV to 2.80 eV upon 0.5 wt% Cr doping is well correlated with the simulation data. The FE-SEM images of the films show spherical morphology with the estimated particle sizes of about ~40 nm and ~ 25 nm were recorded for the ZnO and 0.5 wt% Cr/ZnO films, respectively. Enhanced gas sensing performance is achieved with Cr doping and the sensitivity of ZnO increases from 9.65% to 65.45%, and simultaneously decreasing the response and recovery times from 334.5 s to 172.3 s and from 219 s to 37.2 s, respectively. These improvements in gas sensing performance are due to the reduction in particle size and optical band gap, and an increase in specific surface area.

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Section: Resultsmentioning

confidence: 99%

Enhanced Carbon monoxide-sensing properties of Chromium-doped ZnO nanostructures

Habib

Tajuddin

Noor

et al. 2019

Sci Rep

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“…As shown, the absorption band located at 486 cm -1 is assigned to the stretching vibration of Ce-O bond [37]. The bands located within the wavenumber range of 713-1175 cm -1 are accredited to C-O stretching vibration [7]. The band located around 1423 cm −1 is attributed to C-H bending vibration [38].…”

Section: Resultsmentioning

confidence: 83%

“…In addition, highly reactive oxygen radicals ( • O2 − ) will be produced when the generated electrons (e − ) react with the surrounding atmospheric oxygen molecules (O2). These reactive species are responsible for MG photodegradation [7,36,46].…”

Section: Figure 6 Effect Of the Initial Concentration On The Percentmentioning

confidence: 99%

“…Over the last few years, various techniques have been developed to eliminate organic dyes from water environments including, coagulation-sedimentation [4], membrane filtration [5], photocatalysis [6,7], and adsorption [8][9][10]. Among these methods, photodegradation is attracted much attention because it has the ability to decompose and convert a wide range of dangerous contaminants including organic and inorganic compounds into safe by-products [3,11].…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

“…Recently, Murugan et al [7] used alkaline metal ion (Mg, Ca, Sr, Ba) doped ceria NPs for the photodegradation of methylene blue (MB). In one study, Yue and Zhang [28] used Fe-doped ceria for the photocatalytic degradation of methylene blue.…”

Section: Graphical Abstract Introductionmentioning

confidence: 99%

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Amar

Harara

Baqul

et al. 2020

Asian J. Nanosci. Mater.

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In this study, photocatalytic activity of Ca-doped ceria (CDC) for malachite green (MG) degradation was investigated. CDC was successfully synthesized via co-precipitation method using ammonium oxalate as a precipitating agent. CDC was characterized using Fourier transform infrared spectroscopy (FTIR), powder X-ray diffraction (XRD), UV-Vis spectroscopy, and scanning electron microscopy (SEM). The band gap energy (Eg) of CDC was found to be 3.96 eV. In addition, the factors affecting the photodegradation of MG including; irradiation time, photocatalyst dosage, initial dye concentration, and solution temperature were studied. The results revealed that CDC could degrade approximately 93% of MG dye at the concentration of 6 mg/L, irradiation time of 90 min, photocatalyst dosage of 0.1 g, and solution temperature of 35 °C. The obtained results indicate that CDC is a promising material for the photocatalytic applications and can be used to eliminate very toxic dyes such as MG.

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Method and Application of Surface Modification of Cerium Dioxide

Wang,

Xu,

Zhao

et al. 2024

Adv Eng Mater

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Airborne pollutants, such as nitrogen oxides (NOx), and waterborne contaminants, including heavy metals, dyes, and other pollutants, pose substantial environmental threats and jeopardize human health. Additionally, certain limitations have hindered the widespread application of some batteries, primarily attributed to elevated operating temperatures and the decreasing use of fossil fuels. In response to these challenges, cerium dioxide (CeO2) nanoparticles have garnered considerable attention due to their unique and advantageous physical and chemical properties. Furthermore, the incorporation of CeO2 into various coating materials has demonstrated the potential to significantly enhance their performance. In the realm of biotechnology, research into CeO2 nanoparticles continues to expand, encompassing a range of applications such as the scavenging of reactive oxygen species (ROS) in biological systems, the development of anti‐inflammatory agents, and cancer research. Nevertheless, in these diverse applications, CeO2 still exhibits certain limitations that hinder the achievement of desired outcomes. The modification of CeO2 nanoparticles presents a promising avenue to address these limitations, thereby improving their overall efficacy. As such, this review aims to comprehensively compare and summarize various methods for the modification of CeO2 nanoparticles, elucidate their practical applications, and provide insights into the potential challenges and future prospects in this field.This article is protected by copyright. All rights reserved.

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Pure and alkaline metal ion (Mg, Ca, Sr, Ba) doped cerium oxide nanostructures for photo degradation of methylene blue

Cited by 69 publications

References 35 publications

Enhanced Carbon monoxide-sensing properties of Chromium-doped ZnO nanostructures

Enhanced Carbon monoxide-sensing properties of Chromium-doped ZnO nanostructures

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Method and Application of Surface Modification of Cerium Dioxide

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