Enhancing the Light‐Driven Photocatalytic Degradation Activity of ZnO Nanoparticles With the Synergistic Incorporation of Er and Tb Elements DOI Open Access
Y. Slimani, Mohamed Jaffer Sadiq Mohamed, R. Sivakumar

и другие.

Applied Organometallic Chemistry, Год журнала: 2024, Номер 39(3)

Опубликована: Ноя. 5, 2024

ABSTRACT The existence of organic pollutants in aqueous media has become a vital issue and critical threat to human health, where toxic dyes represent the major contaminants wastewater. Over past few years, photocatalytic techniques have garnered lot interest dye removal from In this study, series Er x Tb Zn 1 − 2 O nanophotocatalysts (where = 0.00, 0.01, 0.03, 0.05) were synthesized coded as ZET0, ZET1, ZET2, ZET3 NPs (nanoparticles). chemical physical characteristics investigated using Fourier‐transform infrared spectroscopy (FT‐IR), X‐ray diffraction (XRD), photoelectron (XPS), transmission electron microscopy (TEM), energy‐dispersive (EDX) spectroscopy, ultraviolet–visible diffuse reflectance (UV–vis DRS) techniques. Further examination by performing experiments, ZET1 demonstrated effective Rhodamine B (RhB) degradation within 60 min. It was found that kinetic rate constant values 0.008, 0.097, 0.050, 0.040 min −1 for NPs, respectively. Aside their remarkable efficiency, these photocatalysts are highly stable even after five consecutive cycles. addition, active species test revealed primary oxidation involved process holes (h + ) hydroxyl radicals (•OH), possible mechanism degrading RhB tentatively proposed. enhancement efficiency is due low recombination photogenerated charge carriers, well strong synergistic impact Tb, Er, ZnO components. Thus, current study could offer versatile strategy design new nano wastewater purification future.

Язык: Английский

Oilfield-produced water treatment using bare maghemite nanoparticles DOI Creative Commons

Jhouly Osorio,

Ramadan Ahmed, Rida Elgaddafi

и другие.

Results in Engineering, Год журнала: 2022, Номер 16, С. 100641 - 100641

Опубликована: Сен. 13, 2022

Oilfield-produced water (PW) can be cleaned using a variety of techniques. However, traditional methods are often expensive and generate secondary waste that pollutes the environment. In addition, PWs contain highly stable micronized dispersed oil, which makes conventional treatment ineffective in meeting regulatory requirements. As result their unique properties, magnetized nanoparticles effectively remove emulsified dissolved oil from PW. This study aims to evaluate residual removal efficiency bare maghemite (γ-Fe2O3) treating oilfield-produced (produced water). Several techniques for manufacturing were evaluated select one is both cost-effective produces high-quality nanoparticles. After with selected method, mineral composition properties determined. Subsequent experiments used synthetic commercial treat samples derived gas wells. By measuring content PW before after treatment, efficiencies Nanoparticles recovered treated samples, washed, reused. Over ten times, they recycled. The recycling potential by assessing reduction recycling. Using fresh nanoparticles, over 98% removed. Even more than 11 was below disposal limit. slight observed. could attributed dissolution carryover during treatment/demulsification operation.

Язык: Английский

Процитировано

11
Synergistic effects of plasma and catalyst in formaldehyde conversion over a Ni/α-Al2O3 catalyst in a dielectric barrier discharge reactor DOI Creative Commons

Amin Nemati Tamar,

Tayebeh Hamzehlouyan, Mohammad Reza Khani

и другие.

Results in Engineering, Год журнала: 2023, Номер 17, С. 100997 - 100997

Опубликована: Март 1, 2023

Plasma-catalytic conversion of formaldehyde, as a representative volatile organic compound, in dielectric barrier discharge reactor over NiOx/α-Al2O3 catalyst was studied. Effects plasma treatment on the physicochemical properties were studied and XPS analysis showed that increased surface contribution more active sites (i.e. Ni2+ adsorbed O). However, physical catalyst, including BET area porosity, did not significantly change after exposure. Presence oxygen plasma-catalytic process improved efficiency. Individual roles selective formaldehyde to CO2, desired product, decoupled. It found that, oxygen-containing atmosphere, can enhance due facilitating role O2-derived intermediates, such ozone, while improves selectivity toward CO2 through catalyzing complete oxidation path. Catalysts make substantial improvement compared corresponding plasma-only conditions, even an oxygen-free environment. Comparison between plasma-only, catalyst-only, conditions with in-plasma (IPC) post-plasma (PPC) configurations yield decreased following order: IPC > PPC catalyst-only plasma-only. Superior performance under to: i) upon treatment; ii) facilitated CHO formation impacts both catalyst; iii) dominance catalytic reaction steps resulting presence catalyst. The system greater than summation demonstrating synergistic effects These results provide new insights into conversion, beneficial selectivity,

Язык: Английский

Процитировано

6
FUTURE TRENDS FOR GREEN ENVIRONMENTAL APPLICATIONS OF NANOTECHNOLOGY: A REVIEW DOI Creative Commons

G. Sh. Al-Obaidy,

May F. Abdulrahman, B. Sh. J. Alobaidy

и другие.

Anbar Journal of Agricultural Sciences, Год журнала: 2023, Номер 21(1), С. 133 - 147

Опубликована: Июнь 30, 2023

Providing a clean and safe environment is one of the great challenges facing humanity. As result various human activities over thousands years in field agriculture, industry, housing, burning fuel elimination forests agricultural areas, has been greatly destroyed, water, air soil are polluted, this resulted several risks problems that It began threatening humanity, perhaps most important which spread diseases epidemics caused by pollution, such as climate change global warming, major climatic led to storms floods on hand, drought, desertification water scarcity other hand. may also lead bigger deeper if we delay challenge. Green environmental applications nanotechnology have for sanitation (land, air) treatment pollution resulting from industrial activities, accommodation others. set low-cost solutions cleaning problems. Environmental protection prominent applied fields pays attention because interrelationship between health which-it lives. technology aims use less harmful gradually leads storage, distribution systems non-polluting environment. Thus, it reduces carbon dioxide emissions significantly, saves world problem or warming. Hence, article review future green ecological nanotechnology.

Язык: Английский

Процитировано

6
Role of Co and Ni ferrites in the fabrication of Saccharum officinarum bioadsorbents for removing As(III) DOI

Abdul Sattar,

Shahzad Hussain,

Fozia Bibi

и другие.

Separation and Purification Technology, Год журнала: 2024, Номер 354, С. 128744 - 128744

Опубликована: Июль 9, 2024

Язык: Английский

Процитировано

2
Enhancing the Light‐Driven Photocatalytic Degradation Activity of ZnO Nanoparticles With the Synergistic Incorporation of Er and Tb Elements DOI Open Access
Y. Slimani, Mohamed Jaffer Sadiq Mohamed, R. Sivakumar

и другие.

Applied Organometallic Chemistry, Год журнала: 2024, Номер 39(3)

Опубликована: Ноя. 5, 2024

ABSTRACT The existence of organic pollutants in aqueous media has become a vital issue and critical threat to human health, where toxic dyes represent the major contaminants wastewater. Over past few years, photocatalytic techniques have garnered lot interest dye removal from In this study, series Er x Tb Zn 1 − 2 O nanophotocatalysts (where = 0.00, 0.01, 0.03, 0.05) were synthesized coded as ZET0, ZET1, ZET2, ZET3 NPs (nanoparticles). chemical physical characteristics investigated using Fourier‐transform infrared spectroscopy (FT‐IR), X‐ray diffraction (XRD), photoelectron (XPS), transmission electron microscopy (TEM), energy‐dispersive (EDX) spectroscopy, ultraviolet–visible diffuse reflectance (UV–vis DRS) techniques. Further examination by performing experiments, ZET1 demonstrated effective Rhodamine B (RhB) degradation within 60 min. It was found that kinetic rate constant values 0.008, 0.097, 0.050, 0.040 min −1 for NPs, respectively. Aside their remarkable efficiency, these photocatalysts are highly stable even after five consecutive cycles. addition, active species test revealed primary oxidation involved process holes (h + ) hydroxyl radicals (•OH), possible mechanism degrading RhB tentatively proposed. enhancement efficiency is due low recombination photogenerated charge carriers, well strong synergistic impact Tb, Er, ZnO components. Thus, current study could offer versatile strategy design new nano wastewater purification future.

Язык: Английский

Процитировано

2