A novel Sm doped Cr2O3 sesquioxide-decorated MWCNTs heterostructured Fenton-like with sonophotocatalytic activities under visible light irradiation

Eshaq, Ghada; Amer, Mohamed; Khan, Moonis Ali; ALOthman, Zeid A.

doi:10.1016/j.jhazmat.2021.127812

Cited by 10 publications

(3 citation statements)

References 91 publications

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“…These approaches cover from sophisticated device fabrication to wide material utilization [2][3][4][5]. Photocatalysts are a large class of materials comprised of organic conjugated polymers [6], supramolecular complexes [7], and, most important, semiconducting materials [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22], etc. Semiconducting materials are preferred photocatalysts due to their good efficiency in utilizing solar energy within the visible region to remove organic pollutants and generate green hydrogen from photoelectrochemical (PEC) water splitting [23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Scavenging of Organic Pollutant and Fuel Generation through Cost-Effective and Abundantly Accessible Rust: A Theoretical Support with DFT Simulations

et al. 2022

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Waste management and energy generation are the foremost concerns due to their direct relationship with biological species and the environment. Herein, we report the utilization of iron rust (inorganic pollutant) as a photocatalyst for the photodegradation of methylene blue (MB) dye (organic pollutant) under visible light (economic) and water oxidation (energy generation). Iron rust was collected from metallic pipes and calcined in the furnace at 700 °C for 3 h to remove the moisture/volatile content. The uncalcined and calcined rust NPs are characterized through scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), Fourier-transform infrared (FTIR) analysis, X-ray Diffraction (XRD), and thermogravimetric analysis (TGA). The morphological study illustrated that the shape of uncalcined and calcined iron rust is spongy, porous, and agglomerated. The XRD and DLS particle sizes are in a few hundred nanometers range. The photodegradation (PD) investigation shows that calcined rust NPs are potent for the PD of modeled MB, and the degradation efficiency was about 94% in a very short time of 11 min. The photoelectrochemical (PEC) measurements revealed that calcined rust NPs are more active than uncalcined rust under simulated 1 SUN illumination with the respective photocurrent densities of ~0.40 and ~0.32 mA/cm2. The density functional theory simulations show the chemisorption of dye molecules over the catalyst surface, which evinces the high catalytic activity of the catalyst. These results demonstrate that cheaper and abundantly available rust can be useful for environmental and energy applications.

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Section: Introductionmentioning

confidence: 99%

Scavenging of Organic Pollutant and Fuel Generation through Cost-Effective and Abundantly Accessible Rust: A Theoretical Support with DFT Simulations

et al. 2022

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“…Especially, as an important p-type semiconductor with a wide band gap ( E g = 3.4 eV), eco-friendly Cr 2 O 3 material possesses excellent corrosion resistance, high harness, gorgeous color, as well as good catalytic activity, magnetism, and conductivity. It has been widely used in many fields of applications, such as roof-top coating, green pigments, catalysts, magnetic materials, and gas sensors . At present, Cr 2 O 3 is often used as an auxiliary phase for hetero-doping or surface modification with other n-type metal oxides, and the chromium-based catalytic effect endows these composites with significantly enhanced sensing performance. , For example, SnO 2 microspheres decorated with Cr 2 O 3 coating can increase the selectivity to ethylene and trimethylamine .…”

Section: Introductionmentioning

confidence: 99%

Porous Cr₂O₃ Architecture Assembled by Nano-Sized Cylinders/Ellipsoids for Enhanced Sensing to Trace H₂S Gas

Song

Zhang

Huang

et al. 2022

ACS Appl. Mater. Interfaces

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How to achieve high sensing of Cr2O3-based sensors for harmful inorganic gases is still a challenge. To this end, Cr2O3 nanomaterials assembled from different building blocks were simply prepared by chromium salt immersion and air calcination with waste scallion roots as the biomass template. The hierarchical architecture calcined at 600 °C is constructed from nanocylinders and nanoellipsoids (named as Cr2O3-600), and also possesses multistage pore distribution for target gas accessibility. Interestingly, the synergism of two shapes of nanocrystals enables the Cr2O3-based sensor to realize highly sensitive detection of trace H2S gas. At 170 °C, Cr2O3-600 exhibits a high response of 42.8 to 100 ppm H2S gas, which is 3.45 times larger than that of Cr2O3-500 assembled from nanocylinders. Meanwhile, this sensor has a low detection limit of 1.0 ppb (S = 1.4), good selectivity, stability, and moisture resistance. These results show that the combination of nanosized cylinders/ellipsoids together with exposed (104) facet can effectively improve the sensing performance of the p-type Cr2O3 material. In addition, the Cr2O3-600 sensor shows satisfactory results for actual monitoring of the corruption process of fresh chicken.

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“…Moreover, gamma rays are also responsible for enhancing the hydrogen adsorption capacity of MWCNTs and the amount of functional-groups attached to the surface of MWCNTs. This is because of an increase in imperfections at MWCNTs surface by gamma radiations [ 38 , 39 , 40 ].…”

Section: Introductionmentioning

confidence: 99%

A Multi-Attribute Decision-Making Model for the Selection of Polymer-Based Biomaterial for Orthopedic Industrial Applications

et al. 2022

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The potential of quantifying the variations in IR active bands was explored while using the chemometric analysis of FTIR spectra for selecting orthopedic biomaterial of industrial scale i.e., ultra-high molecular weight PE (UHMWPE). The nano composites UHMWPE with multi-walled carbon nano-tubes (MWCNTs) and Mg-silicate were prepared and irradiated with 25 kGy and 50 kGy of gamma dose. Principal component analysis (PCA) revealed that first three principal components (PCs) are responsible for explaining the >99% of variance in FTIR data of UHMWPE on addition of fillers and/or irradiation. The factor loadings plots revealed that PC-1 was responsible for explaining the variance in polyethylene characteristics bands and the IR active region induced by fillers i.e., 440 cm−1, 456 cm−1, from 900–1200 cm−1, 1210 cm−1, 1596 cm−1, PC-2 was responsible for explaining the variance in spectra due to radiation-induced oxidation and cross linking, while the PC-3 is responsible for explaining the variance induced because of IR active bands of MWCNTs. Hierarchy cluster analysis (HCA) was employed to classify the samples into four clusters with respect to similarity in their IR active bands which is further confirmed by PCA. According to multi attribute analysis with PCA and HCA, 65 kGy irradiated sample is optimum choice from the existing alternatives in the group of irradiated pristine UHMWPE, UHMWPE/Mg-silicate irradiated with 25 kGy of gamma dose was the optimum choice for UHWMPE/Mg-silicate nano composites, and UHMWPE/γMWCNTs composites containing 1.0% dof γ MWCNTs for UHMWPE/MWCNTs nanocomposites, respectively. The results show the effectiveness of quantifying the variance for decision as far as optimization of biomaterials in orthopedic industrial applications is concerned.

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A novel Sm doped Cr2O3 sesquioxide-decorated MWCNTs heterostructured Fenton-like with sonophotocatalytic activities under visible light irradiation

Cited by 10 publications

References 91 publications

Scavenging of Organic Pollutant and Fuel Generation through Cost-Effective and Abundantly Accessible Rust: A Theoretical Support with DFT Simulations

Scavenging of Organic Pollutant and Fuel Generation through Cost-Effective and Abundantly Accessible Rust: A Theoretical Support with DFT Simulations

Porous Cr₂O₃ Architecture Assembled by Nano-Sized Cylinders/Ellipsoids for Enhanced Sensing to Trace H₂S Gas

A Multi-Attribute Decision-Making Model for the Selection of Polymer-Based Biomaterial for Orthopedic Industrial Applications

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A novel Sm doped Cr2O3 sesquioxide-decorated MWCNTs heterostructured Fenton-like with sonophotocatalytic activities under visible light irradiation

Cited by 10 publications

References 91 publications

Scavenging of Organic Pollutant and Fuel Generation through Cost-Effective and Abundantly Accessible Rust: A Theoretical Support with DFT Simulations

Scavenging of Organic Pollutant and Fuel Generation through Cost-Effective and Abundantly Accessible Rust: A Theoretical Support with DFT Simulations

Porous Cr2O3 Architecture Assembled by Nano-Sized Cylinders/Ellipsoids for Enhanced Sensing to Trace H2S Gas

A Multi-Attribute Decision-Making Model for the Selection of Polymer-Based Biomaterial for Orthopedic Industrial Applications

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Resources

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Porous Cr₂O₃ Architecture Assembled by Nano-Sized Cylinders/Ellipsoids for Enhanced Sensing to Trace H₂S Gas