Recent progress in rare earth oxides and carbonaceous materials modified ZnO heterogeneous photocatalysts for environmental and energy applications

Ahmad, Irshad; Shukrullah, Shazia; Naz, Muhammad Yasin; Bhatti, Haq Nawaz; Ahmad, Mahmood; Ahmed, Ejaz; Ullah, Sami; Hussien, Mohamed

doi:10.1016/j.jece.2022.107762

Cited by 30 publications

(5 citation statements)

References 201 publications

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“…In addition, the radical ( • OH) could be produced by the interaction between the holes in the VB and the H 2 O molecules, and/or the adsorbed hydroxy (−OH) functional group. Finally, the adsorbed molecules of the ) and hydroxyl ( • OH) radicals, into inorganic end product [1,2,8,48,78].…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, many reported studies have shown that ZnO modified with appropriate dopants (such as rare-Earth (RE) elements and noble metals) can exhibit improved properties compared to the pristine ZnO in different applications [8][9][10][11][12][13][14][15]. For example, the photocatalytic properties of ZnO nanoparticles have been enhanced upon doping with europium ions (Eu 3+ ) [16][17][18], erbium ions (Er 3+ ) [19][20][21][22][23][24][25], and by hybridization with selected noble metal such as silver (Ag) [26][27][28][29][30][31][32][33][34][35][36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

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Photocatalytic activity of hybrid Ag/Er:ZnO nanoparticles synthesized by pulsed laser ablation in distilled water

Ahmed¹,

Imam²

2023

Phys. Scr.

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We have studied the photocatalytic performance of ZnO, Er:ZnO, hybrid Ag/ZnO, and Ag/Er:ZnO colloidal nanoparticles (NPs) synthesized by pulsed laser ablation of stoichiometric targets and silver plate in double distilled water. The X-ray diffraction (XRD) analysis revealed the polycrystalline structure of the ablated NPs. The morphology of the nanoparticles was examined by the transmission electron microscope (TEM). The optical properties of the prepared colloidal NPs were investigated by the UV-visible absorption and photoluminescence spectroscopies. The photodegradation of the Rhodamine 6G organic dye was utilized to evaluate the photocatalytic activity of the produced colloidal NPs under illumination by UV light. The hybrid Ag/Er:ZnO colloidal NPs showed enhanced photodegradation efficiency of 96.4%, after 45 min of UV irradiation, compared to 79.7% of the pristine ZnO NPs. The obtained results point out the enhancing effect of the dopants on the photocatalytic performance of ZnO, and further demonstrate the pulsed laser ablation of bulk materials in pure water as a fast and eco-friendly technique for producing efficient nanoparticle photocatalysts.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photocatalytic activity of hybrid Ag/Er:ZnO nanoparticles synthesized by pulsed laser ablation in distilled water

Ahmed¹,

Imam²

2023

Phys. Scr.

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“…[1][2][3] It also has excellent chemical and thermal stability, low cost and high flexibility that allows synthesizing different nanostructures such as nanorods, nanowires, nanocolumns, etc. [2,4,5] The above properties make it possible to use in promising applications like sensors, [6,7] antimicrobial activity, [8,9] photocatalysis, [10][11][12] solar cells, [13,14] liquid crystals, [15] etc. The addition of dopant elements [16][17][18] in ZnO host material leads to tailor its optical, structural, electric and magnetic properties improving device applications.…”

Section: Introductionmentioning

confidence: 99%

Growth of ZnO thin Films from Depleted Batteries for Water Remediation

Melia,

Gallegos,

Juncal

et al. 2024

ChemistrySelect

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ZnO films were obtained by electrodeposition technique from commercial Zn2+ solutions and those obtained from spent alkaline batteries. The type of counterion and pH impact directly on the structural, morphological, and optical properties of the electrodeposited ZnO films. The morphological and crystallographic orientation differences observed by X‐ray diffraction (XRD) analysis and high‐resolution field emission scanning electron microscopy (HR‐FESEM), demonstrates the influence of the type and origin of precursors used in the ZnO synthesis process. Those samples grown from commercial nitrate solutions exhibit nanocolumns revealing a preferential growth in the (002) direction. On the other hand, random growth (hexagonal plates, agglomerations, clusters, etc.) is observed in samples obtained through recycled solutions. All deposited samples achieved a transparency close to 80 % and an optical band gap of around 3.30 eV. The as‐deposited films were evaluated toward the photodegradation capacity of methylene blue (MB) for potential technological applications. Results exhibit that samples prepared from recycled ZnCl2 solutions presented more than 80 % degradation per mass of ZnO. This work demonstrates a virtuous circle since ZnO films are deposited by a facile and scalable technique from discarded batteries and used for MB photodegradation. Furthermore, the simplicity of recovery of these substrates after application makes them an attractive and pragmatic option for a range of water treatment applications. Synopsis: Zinc from depleted alkaline batteries is reused to obtain ZnO thin films that remove contaminating dyes from water.

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“…Due to their ability to form high-performance functional materials in combination with other elements, rare-earth elements serve as the core components in a plethora of novel functional materials [ 2 ]. Various REE-containing functional materials, such as rare-earth magnetic materials, hydrogen storage materials, luminescent materials, catalytic materials, etc., find widespread applications in metallurgical machinery [ 3 ], petrochemicals [ 4 ], light industry and agriculture [ 5 ], energy and environmental protection [ 6 ], defense and military industries [ 7 ], and high-tech materials [ 8 ]. For instance, in the medical field, Chao Mi et al [ 9 ] have introduced a novel, non-radiative, high-resolution method for diagnosing skeletal diseases using lanthanide-doped nanocrystals in high-resolution near-infrared II (NIR-II) imaging.…”

Section: Introductionmentioning

confidence: 99%

Overview of Functionalized Porous Materials for Rare-Earth Element Separation and Recovery

Peng,

Zhu,

Zou

et al. 2024

Molecules

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The exceptional photoelectromagnetic characteristics of rare-earth elements contribute significantly to their indispensable position in the high-tech industry. The exponential expansion of the demand for high-purity rare earth and related compounds can be attributed to the swift advancement of contemporary technology. Nevertheless, rare-earth elements are finite and limited resources, and their excessive mining unavoidably results in resource depletion and environmental degradation. Hence, it is crucial to establish a highly effective approach for the extraction and reclamation of rare-earth elements. Adsorption is regarded as a promising technique for the recovery of rare-earth elements owing to its simplicity, environmentally friendly nature, and cost-effectiveness. The efficacy of adsorption is contingent upon the performance characteristics of the adsorbent material. Presently, there is a prevalent utilization of porous adsorbent materials with substantial specific surface areas and plentiful surface functional groups in the realm of selectively separating and recovering rare-earth elements. This paper presents a thorough examination of porous inorganic carbon materials, porous inorganic silicon materials, porous organic polymers, and metal–organic framework materials. The adsorption performance and processes for rare-earth elements are the focal points of discussion about these materials. Furthermore, this work investigates the potential applications of porous materials in the domain of the adsorption of rare-earth elements.

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Recent progress in rare earth oxides and carbonaceous materials modified ZnO heterogeneous photocatalysts for environmental and energy applications

Cited by 30 publications

References 201 publications

Photocatalytic activity of hybrid Ag/Er:ZnO nanoparticles synthesized by pulsed laser ablation in distilled water

Photocatalytic activity of hybrid Ag/Er:ZnO nanoparticles synthesized by pulsed laser ablation in distilled water

Growth of ZnO thin Films from Depleted Batteries for Water Remediation

Overview of Functionalized Porous Materials for Rare-Earth Element Separation and Recovery

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