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Vijayan S, Umadevi G, Mariappan R, Kumar CS, Karthikeyan A. Effect of metal ion on optical, photoluminescence, morphological, and photocatalytic properties of ZnS nanoparticles. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023:10.1007/s11356-023-27709-4. [PMID: 37269509 DOI: 10.1007/s11356-023-27709-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 05/13/2023] [Indexed: 06/05/2023]
Abstract
The semiconducting materials of pure zinc sulfide (ZnS), 2.5 wt%, 5.0 wt%, 7.5 wt%, and 10 wt% of Ag-doped ZnS nanoparticles were prepared using the sol-gel technique. The prepared nanoparticles were analyzed by powder X-ray diffraction (PXRD), Fourier transformed infrared (FTIR), UV-visible absorption, diffuse reflectance photoluminescence (PL), high-resolution transmission electron microscope (HRTEM), and field emission scanning electron microscope (FESEM) to study the properties of pure ZnS and Ag-doped ZnS nanoparticles (NPs). The Ag-doped ZnS nanoparticles have a polycrystalline nature, which is confirmed by PXRD analysis. The functional groups were identified by the FTIR technique. The bandgap values decrease with increasing Ag concentration compared to pure ZnS NPs. The crystal size lies between 12 and 41 nm for pure ZnS and Ag-doped ZnS NPs. The presence of Zn, S, and Ag elements was confirmed by EDS analysis. Using methylene blue (MB), the photocatalytic activity of pure ZnS and Ag-doped ZnS NPs was performed. The highest degradation efficiency was observed for 7.5 wt% Ag-doped ZnS NPs.
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Affiliation(s)
- Selvaraj Vijayan
- Department of Physics, Govt. Arts College, Coimbatore, Tamilnadu, India
- Department of Physics, MGR College, Hosur, Tamilnadu, India
| | - Ganapathi Umadevi
- Department of Physics, Govt. Arts College, Coimbatore, Tamilnadu, India.
| | - Ramasamy Mariappan
- Department of Physics, Adhiyamaan College of Engineering, Hosur, Tamilnadu, India
| | | | - Anbalagan Karthikeyan
- Department of Physics, Government College of Engineering, Dharmapuri, Tamilnadu, India
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Liu Q, Fan Z, Yi X, Chen S, Li B, Luo W. Porous polyimide/carbon quantum dots/ZnS quantum dots material aerogel for efficient visible-light photocatalytic degradation over oxytetracycline. REACT FUNCT POLYM 2022. [DOI: 10.1016/j.reactfunctpolym.2022.105330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Tuning the Optical Band Gap of Semiconductor Nanocomposites-A Case Study with ZnS/Carbon. MATERIALS 2020; 13:ma13184162. [PMID: 32962171 PMCID: PMC7560407 DOI: 10.3390/ma13184162] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Revised: 09/11/2020] [Accepted: 09/14/2020] [Indexed: 11/17/2022]
Abstract
The linear photochemical response of materials depends on two critical parameters: the size of the optical band gap determines the onset of optical excitation, whereas the absolute energetic positions of the band edges define the reductive or oxidative character of photo-generated electrons and holes. Tuning these characteristics is necessary for many potential applications and can be achieved through changes in the bulk composition or particle size, adjustment of the surface chemistry or the application of electrostatic fields. In this contribution the influence of surface chemistry and fields is investigated systematically with the help of standard DFT calculations for a typical case, namely composites prepared from ZnS quantum dots and functionalized carbon nanotubes. After comparing results with existing qualitative and quantitative experimental data, it is shown conclusively, that the details of the surface chemistry (especially defects) in combination with electrostatic fields have the largest influence. In conclusion, the development of novel or improved photoresponsive materials therefore will have to integrate a careful analysis of the interplay between surface chemistry, surface charges and interaction with the material environment or substrate.
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Ballem E, Azeem A, Rayavarapu PR, Divi H. Structural and luminescent studies of erbium-doped CaZrO 3 green-emitting nanophosphors. LUMINESCENCE 2017; 32:1246-1251. [PMID: 28612410 DOI: 10.1002/bio.3318] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Revised: 01/02/2017] [Accepted: 02/21/2017] [Indexed: 11/08/2022]
Abstract
Erbium (Er) (0.5, 1.0 and 1.5 wt%)-doped CaZrO3 nanophosphors were synthesized by the sol-gel method using poly(vinyl alcohol) as the chelating agent. Their structural and photoluminescence properties were studied using X-ray diffraction (XRD), field emission scanning electron microscopy-energy dispersive spectroscopy (FESEM-EDS), transmission electron microscopy (TEM), photoluminescence and Fourier transform infrared spectroscopy (FTIR). The XRD patterns of the samples confirm that nanoscale crystallite sizes. Agglomeration of the samples was observed using field emission scanning electron microscopy images. Energy dispersive spectroscopy measurements confirmed the existence of Ca, Zr, O and Er in the samples. Average particle sizes for the samples were calculated from transmission electron microscopy images. FTIR spectra clearly show characteristic absorption bands related to the metal oxides, as well as some other organic molecules. The photoluminescence spectra show bands in the green region. The Commission International de l'Eclairage coordinates were calculated and found to be in green region.
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Affiliation(s)
- Evangeline Ballem
- Department of Physics, National Institute of Technology, Warangal, India
| | - Abdul Azeem
- Department of Physics, National Institute of Technology, Warangal, India
| | - Prasada Rao Rayavarapu
- Department of Materials Science and Engineering, National University of Singapore, Singapore
| | - Haranath Divi
- CSIR - National Physical Laboratory, New Delhi, India
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Baran M, Korsunskaya N, Stara T, Venger Y, Kryshtab T, Stroyuk O, Raevskaya A, Korzhak G, Kuchmiy S. Graded ZnS/ZnSxO1−x heterostructures produced by oxidative photolysis of zinc sulfide: Structure, optical properties and photocatalytic evolution of molecular hydrogen. J Photochem Photobiol A Chem 2016. [DOI: 10.1016/j.jphotochem.2016.07.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Kravtsova AN, Pankin IA, Budnyk AP, Butova VV, Lastovina TA, Soldatov AV. Synthesis and structure modeling of ZnS based quantum dots. J STRUCT CHEM+ 2016. [DOI: 10.1134/s0022476616050115] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Tayebi M, Tavakkoli Yaraki M, Mogharei A, Ahmadieh M, Tahriri M, Vashaee D, Tayebi L. Thioglycolic Acid-Capped CdS Quantum Dots Conjugated to α-Amylase as a Fluorescence Probe for Determination of Starch at Low Concentration. J Fluoresc 2016; 26:1787-94. [PMID: 27392974 DOI: 10.1007/s10895-016-1870-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Accepted: 06/14/2016] [Indexed: 11/28/2022]
Abstract
In the present research, water soluble thioglycolic acid-capped CdS quantum dots (QDs) were synthesized by chemical precipitation method. The characteristics of prepared quantum dots were determined using X-Ray Diffraction (XRD) and Transmission Electron Microscopy (TEM). The obtained results revealed that CdS QDs have 5.60 nm crystallite size, hexagonal wurtzite structure and spherical morphology with less than 10 nm diameter. The photoluminescence (PL) spectroscopy was performed in order to study the effect of the presence of starch solutions. Blue emission peaks were positioned at 488 nm and its intensity quenched by increasing the concentration of starch solutions. The result of PL quenches in range of studied concentrations (0-100 ppm) was best described by Michaelis-Menten model. The amount of Michaelis constant (Km) for immobilized α-amylase in this system was about 68.08 ppm which showed a great tendency of enzyme to hydrolyze the starch as substrate. Finally, the limit of detection (LOD) was found to be about 2.24 ppm.
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Affiliation(s)
- Mahnoush Tayebi
- Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
| | - Mohammad Tavakkoli Yaraki
- Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran.
| | - Azadeh Mogharei
- Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
| | - Mahnaz Ahmadieh
- Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
| | - Mohammadreza Tahriri
- Marquette University School of Dentistry, Milwaukee, WI, 53233, USA. .,Dental Biomaterials Department, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran. .,Biomaterials Group, Faculty of Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran.
| | - Daryoosh Vashaee
- Electrical and Computer Engineering Department, North Carolina State University, Raleigh, NC, 27606, USA
| | - Lobat Tayebi
- Marquette University School of Dentistry, Milwaukee, WI, 53233, USA.,Department of Engineering Science, University of Oxford, Oxford, OX1 3PJ, UK
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Xuan TT, Liu JQ, Yu CY, Xie RJ, Li HL. Facile Synthesis of Cadmium-Free Zn-In-S:Ag/ZnS Nanocrystals for Bio-Imaging. Sci Rep 2016; 6:24459. [PMID: 27074820 PMCID: PMC4830992 DOI: 10.1038/srep24459] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 03/29/2016] [Indexed: 12/23/2022] Open
Abstract
High quality cadmium-free Zn-In-S:Ag doped-nanocrystals (d-NCs) were synthesized via a simple one-step noninjection route using silver nitrate, indium acetate, zinc acetate, oleylamine, S powder and 1-dodecanethiol as starting materials in an organic phase. The size and optical properties can be effectively tailored by controlling the reaction time, reaction temperature, Ag(+) dopant concentration, and the molar ratio of In to Zn. The photoluminescence wavelength of as-prepared Zn-In-S:Ag NCs covered a broad visible range from 458 nm to 603 nm. After being passivated by protective ZnS shell, the photoluminescence quantum yield (PLQY) of Zn-In-S:Ag(+) /ZnS was greatly improved to 43.5%. More importantly, the initial high PLQY of the obtained core/shell d-NCs in organic media can be preserved when being transferred into the aqueous media via ligand exchange. Finally, high quality Zn-In-S:Ag(+) /ZnS d-NCs in aqueous phase were applied as bio-imaging agents for identifying living KB cells.
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Affiliation(s)
- Tong-Tong Xuan
- Engineering Research Center for Nanophotonics & Advanced Instrument, Ministry of Education, School of Physics and Materials Science, East China Normal University, Shanghai, 200062, China
| | - Jia-Qing Liu
- Engineering Research Center for Nanophotonics & Advanced Instrument, Ministry of Education, School of Physics and Materials Science, East China Normal University, Shanghai, 200062, China
| | - Cai-Yan Yu
- Engineering Research Center for Nanophotonics & Advanced Instrument, Ministry of Education, School of Physics and Materials Science, East China Normal University, Shanghai, 200062, China
| | - Rong-Jun Xie
- Sialon Group, National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba, Ibaraki 305-0044, Japan
| | - Hui-Li Li
- Engineering Research Center for Nanophotonics & Advanced Instrument, Ministry of Education, School of Physics and Materials Science, East China Normal University, Shanghai, 200062, China
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Cao J, Han D, Wang B, Fan L, Fu H, Wei M, Feng B, Liu X, Yang J. Low temperature synthesis, photoluminescence, magnetic properties of the transition metal doped wurtzite ZnS nanowires. J SOLID STATE CHEM 2013. [DOI: 10.1016/j.jssc.2013.01.046] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Siqueira GO, de Oliveira Porto A, Viana MM, da Silva HV, de Souza YG, da Silva HWA, de Lima GM, Matencio T. Bismuth sulphides prepared by thermal and hydrothermal decomposition of a single source precursor: the effect of reaction parameters on morphology, microstructure and catalytic activity. Phys Chem Chem Phys 2013; 15:16236-41. [DOI: 10.1039/c3cp51609a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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