Synthesis of Gd/N co-doped ZnO for enhanced UV-vis and direct solar-light-driven photocatalytic degradation

Alanazi, Hamdah S.; Ahmad, Naushad; Alharthi, Fahad A.

doi:10.1039/d0ra10698d

Cited by 46 publications

(19 citation statements)

References 31 publications

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“…The PL spectra of the prepared samples show three main peaks at 340, 380, and 466 nm. 49,50 We observed that the PL emission intensity of pure ZnO NPs was higher than those of Mo-ZnO NPs and Mo-ZnO/RGO NCs. A decrease in the emission intensity is allied with the hindrance of the recombination of charge carriers (e − /h + ), caused geometric distortions, and created more oxygen vacancies.…”

Section: Resultsmentioning

confidence: 87%

Enhanced Anticancer Performance of Eco-Friendly-Prepared Mo-ZnO/RGO Nanocomposites: Role of Oxidative Stress and Apoptosis

et al. 2022

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ZnO nanoparticles (NPs) have attracted great attention in cancer therapy because of their novel and tailorable physicochemical features. Pure ZnO NPs, molybdenum (Mo)-doped ZnO NPs, and Mo-ZnO/reduced graphene oxide nanocomposites (Mo-ZnO/RGO NCs) were prepared using a facile, inexpensive, and eco-friendly approach using date palm ( Phoenix dactylifera L.) fruit extract. Anticancer efficacy of green synthesized NPs/NCs was examined in two different cancer cells. The potential mechanism of the anticancer activity of green synthesized NPs/NCs was explored through oxidative stress and apoptosis. The syntheses of pure ZnO NPs, Mo-ZnO NPs, and Mo-ZnO/RGO NCs were confirmed by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and photoluminescence (PL). Dynamic light scattering (DLS) study indicated the excellent colloidal stability of green prepared samples. Mo-ZnO/RGO NCs exhibited threefold higher anticancer activity in human colon (HCT116) and breast (MCF7) cancer cells as compared to pure ZnO NPs. The anticancer activity of Mo-ZnO/RGO NCs was mediated through reactive oxygen species, p53, and the caspase-3 pathway. Moreover, cytocompatibility of Mo-ZnO/RGO NCs in human normal colon epithelial (NCM460) and normal breast epithelial cells (MCF10A) was much better than those of pure ZnO NPs. Altogether, green stabilized Mo-ZnO/RGO NCs exhibited enhanced anticancer performance and improved cytocompatibility because of green mediated good synergism between ZnO, Mo, and RGO. This study suggested the high nutritional value fruit-based facile preparation of ZnO-based nanocomposites for cancer therapy.

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Section: Resultsmentioning

confidence: 87%

Enhanced Anticancer Performance of Eco-Friendly-Prepared Mo-ZnO/RGO Nanocomposites: Role of Oxidative Stress and Apoptosis

et al. 2022

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“…After the nitridation at a higher temperature (>873 K), the O–H vibrations at around 3400 and 1600 cm –1 were barely observed, and CO 3 2– vibrations at around 1360 and 770 cm –1 disappeared due to the collapse of the layered structure and transformation to oxide species. The presence of O–Zn–N, Zn–N, and Al–N peaks at 1510, 1380, and 710 cm –1 confirms the incorporation of an N dopant into the oxide lattice. The Al–O vibration at 670 cm –1 was observed upon heating at 1073–1273 K, indicating the presence of ZnAl 2 O 4 .…”

Section: Resultsmentioning

confidence: 79%

“…After the nitridation at a higher temperature (>873 K), the O−H vibrations at around 3400 and 1600 cm −1 were barely observed, and CO 3 2− vibrations 33 at around 1360 and 770 cm −1 disappeared due to the collapse of the layered structure and transformation to oxide species. The presence of O−Zn−N, Zn−N, 37 and Al−N 38 Given the aforementioned results, we further investigated the local structure around Zn atoms in the nitridation products using XAFS, which can detect even small amounts of impurity phases because of its high sensitivity and element specificity. 39 The Zn−K edge X-ray absorption near edge structure (XANES) spectra of Zn−Al LDH changed after nitridation at temperatures greater than 773 K, indicating a transformation Notably, the spectra of samples nitrided at low temperatures (773−873 K) showed an absorption edge shoulder similar to that for Zn(CN 2 ) (Figure 4B).…”

Section: ■ Introductionmentioning

confidence: 99%

Orange Zn–Al–O–N Powder Active for Photocatalytic Water Reduction and Oxidation Synthesized from a Zn–Al Layered Double Hydroxide Using Urea as the Nitriding Agent

Suppaso

Nishioka

Kanazawa

et al. 2022

ACS Sustainable Chem. Eng.

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The development of colored inorganic powders that are inexpensive, chemically stable, and nontoxic is important for applications such as heterogeneous photocatalysts and pigments. Here, we show that a ZnO-based orange powder can be synthesized through thermal conversion of a two-dimensional Zn−Al layered double hydroxide (LDH) in the presence of urea as a nitriding agent, thereby avoiding the use of expensive, poisonous NH 3 gas. Heating a mixture of Zn−Al LDH and urea under a flow of N 2 at 773 K yielded N-doped ZnO as the main crystalline phase, along with a small amount of Zn(CN 2 ). At temperatures greater than 873 K, N-doped ZnO with deep-orange coloration began to appear as the main phase, accompanied by a small amount of γ-AlON. The orange color, which was attributed to the formation of a N-doped ZnO phase, became more prominent with increasing temperature up to 973 K. At temperatures greater than 973 K, an optically transparent ZnAl 2 O 4 phase was dominant, resulting in a loss of the orange coloration. Nitridation of Zn 5 (OH) 6 (CO 3 ) 2 and γ-AlOOH, which are analogous layered compounds prepared in a manner similar to that of Zn−Al LDH, with urea at 973 K did not yield an orange product. Under visible light, the Zn−Al−O−N powder produced H 2 from aqueous methanol solution and O 2 gas from a silver nitrate solution, with apparent quantum yields of 0.26 and 1.8% at 420 nm, respectively. This work highlights that the use of base metal-based LDH and an inexpensive solid nitrogen source may provide a unique platform for synthesizing a new photocatalyst material, which is unattainable with the previous method using toxic ammonia gas.

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“…Substances extracted from plants appeared as a very appropriate influencer for the extensive synthesis of alloy NPs else than various described procedures of using risky chemical compounds, causing severe damage if preserve in the environment. The plant material used also affects the consistency and flexibility of NPs [ 55 ]. More specifically, the use of peeled Solanum tuberosum common tuberous crop was suggested, because of the starch component; a major form of carbohydrate content could be proficiently utilized as a means for NP synthesis [ 56 ].…”

Section: The Followed Means Of Plant-derived Ag/zno Alloy Np Synthesismentioning

confidence: 99%

Plant-Based Bimetallic Silver-Zinc Oxide Nanoparticles: A Comprehensive Perspective of Synthesis, Biomedical Applications, and Future Trends

Ehsan

Waheed

Ullah

et al. 2022

BioMed Research International

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The universal emphasis on the study of green nanotechnology has led to biologically harmless uses of wide-ranged nanomaterials. Nanotechnology deals with the production of nanosized particles with regular morphology and properties. Various researches have been directed on nanomaterial synthesis by physical, chemical, and biological means. Understanding the safety of both environment and in vivo, a biogenic approach particularly plant-derived synthesis is the best strategy. Silver-zinc oxide nanoparticles are most effective. Moreover, these engineered nanomaterials via morphological modifications attain improved performance in antimicrobial, biomedical, environmental, and therapeutic applications. This article evaluates manufacturing strategies for silver-zinc oxide nanoparticles via plant-derived means along with highlighting their broad range of uses in bionanotechnology.

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Synthesis of Gd/N co-doped ZnO for enhanced UV-vis and direct solar-light-driven photocatalytic degradation

Abstract: The construction of a UV-Vis and direct sunlight functioning photocatalyst is a puzzling task for organic pollutant removal.

Cited by 46 publications

References 31 publications

Enhanced Anticancer Performance of Eco-Friendly-Prepared Mo-ZnO/RGO Nanocomposites: Role of Oxidative Stress and Apoptosis

Enhanced Anticancer Performance of Eco-Friendly-Prepared Mo-ZnO/RGO Nanocomposites: Role of Oxidative Stress and Apoptosis

Orange Zn–Al–O–N Powder Active for Photocatalytic Water Reduction and Oxidation Synthesized from a Zn–Al Layered Double Hydroxide Using Urea as the Nitriding Agent

Plant-Based Bimetallic Silver-Zinc Oxide Nanoparticles: A Comprehensive Perspective of Synthesis, Biomedical Applications, and Future Trends

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