Development and advancement of undoped and doped zinc sulfide for phosphor application

Lahariya, Vikas; Dhoble, S.J.

doi:10.1016/j.displa.2022.102186

Cited by 13 publications

(6 citation statements)

References 124 publications

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“…Although transition metals with modified CDs show fluorescent stability, such as cadmium (Cd), tellurium (Te), silver (Ag), selenium (Se) and cobalt (Co), they have low biological compatibility that has limited their application [ 25 ]. Additionally, the preparation of these materials is toxic and incurs an expensive cost to a great extent, which restricts their application in the fields of biology, medicine and so on [ 26 , 27 , 28 , 29 ]. Therefore, it is necessary to develop metal-modified CDs with low cytotoxicity.…”

Section: Introductionmentioning

confidence: 99%

Copper-Modified Double-Emission Carbon Dots for Rapid Detection of Thiophanate Methyl in Food

Yue

Zhu

et al. 2022

Foods

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The detection of food safety and quality is very significant throughout the food supply. Stable dual-emission copper-modified fluorescent carbon dots (Cu-CDs) were successfully synthesized by a simple and environment-friendly hydrothermal, which was used for the real-time detection of pesticide residues in agricultural products. By optimizing the reaction conditions, Cu-CDs showed two emission peaks, with the highest fluorescence intensities at 375 and 450 nm. The structure, chemical composition and optical properties of Cu-CDs were investigated by XRD, TEM and IR. The results showed that thiophanate methyl (TM) could induce fluorescence quenching of Cu-CDs with no other ligands by the electron transfer through π-π stacking. The synchronous response of the dual-emission sensor enhanced the specificity of TM, which showed remarkable anti-interference capability. The fluorescence quenching degree of Cu-CDs had a good linear relationship with the TM concentration; the low detection limit for a pear was 0.75 μM, and for an apple, 0.78 μM. The recoveries in the fruit samples were 79.70–91.15% and 81.20–93.55%, respectively, and the relative standard deviations (RSDs) were less than 4.23% for the pear and less than 3.78% for the apple. Thus, our results indicate the feasibility and reliability of our methods in detecting pesticide residues in agricultural products.

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Section: Introductionmentioning

confidence: 99%

Copper-Modified Double-Emission Carbon Dots for Rapid Detection of Thiophanate Methyl in Food

Yue

Zhu

et al. 2022

Foods

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“…Doping in ZnS quantum dots involves the deliberate introduction of foreign atoms, or dopants, into the ZnS crystal lattice to modify their electronic, optical, or magnetic properties. 26,27 The synthesis of transition and non-transition metal-doped ZnS quantum dots involves a range of techniques, each influencing the resultant properties of the nanomaterials. Chemical precipitation, sol-gel, hydrothermal synthesis, and co-precipitation are among the commonly employed methods, offering precise control over particle size, morphology, and dopant concentration.…”

Section: Doping: a Mechanistic Overviewmentioning

confidence: 99%

“…3 (A) PL emission of ZnS QDs, 24 (B) TEM and SAED images of pure ZnS, 25 and (C) ZnS XRD patterns at three different pH levels. 26 exchange reaction enables the temporal separation of the growth process of the nanocrystals from the doping of dopant ions into host nanocrystals. [33][34][35][36] The mechanism can be summarized as follows.…”

Section: Doping: a Mechanistic Overviewmentioning

confidence: 99%

Cation exchange doping by transition and non-transition metals: embracing luminescence for band gap tunability in a ZnS lattice

Pandey,

Singh,

Kaundal

et al. 2024

New J. Chem.

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“…ZnS is an inexpensive and easy-to-prepare material that offers good charge carrier mobility and reasonable photostability. , It has a wide bandgap (from 3.3 to 3.8 eV), − which narrows its activity to the UV-light range. ZnS nanomaterials have been recently tested in the processes of photocatalytic organic pollutant degradation, − CO 2 reduction, − water splitting, , and photocatalytic organic syntheses. − Due to the very negative potential of its conduction band edge, it appears a particularly promising photocatalyst in energy-demanding processes like CO 2 and water reduction. , Zinc sulfide is also well-known for its light emission properties, which are usually related to the presence of interband states. − The emission spectrum is usually composed of green (513–530 nm) and blue (435–450 nm) emissions. The observed significant red shift of the emission points to a considerable energy difference between the interband states and the band edge.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic and Spectroelectrochemical Studies on Redox Properties of Zinc Sulfide and Their Consequences on Photocatalytic Activity

Mróz,

Kobielusz,

Orzeł

et al. 2023

J. Phys. Chem. C

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Understanding the relationships between the electronic structure (and therefore redox properties) of semiconductors and their photoactivity is crucial for a rational design of photocatalysts. In this work, we undertake such analysis with the help of emission and absorption UV−vis spectroscopy, as well as diffuse reflectance spectroelectrochemistry (SE-DRS). Herein, we focus on zinc sulfide, which is considered a photocatalyst with strong reducing properties but is also known for its efficient visible light photoluminescence. A series of ZnS materials with a different Zn:S ratio was synthesized, in an anaerobic and oxygen atmosphere. The synthesized samples were thoroughly studied in terms of morphological, photophysical, and photocatalytic properties. Two groups of materials (sulfur-rich and sulfur-deficient) could be distinguished, with significantly different properties, such as the crystal size, oxygen concentration, bandgap energy, distribution of electronic states, and photoelectrocatalytic and photocatalytic activities. We confirmed the presence of deep electronic states, which significantly decrease the reduction abilities of ZnS, some of which are surface states. Models of the electronic structures associated with possible photophysical processes were proposed for both sulfur-rich and sulfur-deficient materials. Although in proposed models the energy of photogenerated electrons is significantly lower than that usually considered based on the level of the conduction band edge, the photocatalytic tests revealed their sufficient potential to perform hydrogen evolution and CO 2 reduction processes.

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Development and advancement of undoped and doped zinc sulfide for phosphor application

Cited by 13 publications

References 124 publications

Copper-Modified Double-Emission Carbon Dots for Rapid Detection of Thiophanate Methyl in Food

Copper-Modified Double-Emission Carbon Dots for Rapid Detection of Thiophanate Methyl in Food

Cation exchange doping by transition and non-transition metals: embracing luminescence for band gap tunability in a ZnS lattice

Spectroscopic and Spectroelectrochemical Studies on Redox Properties of Zinc Sulfide and Their Consequences on Photocatalytic Activity

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